Why do designers & owners choose structural steel?

A project can be very successful is to select structural steel which brings numerous benefits. All other materials are measured against the standard of structural steel and structural steel is still the material of choice. So, why do they choose structural steel yet?

Today, I am here to answers why it is so important according to my experience. Speed of construction is the main factor while making the project. Other materials may be able to start field work sooner, but the rapid design, fabrication and erection cycle with structural steel will allow the framing system to finish sooner and be available earlier to other trades.

Structural steel has remained the cost leader for construction materials over the past 30 years. And comparative studies indicate that a steel structure engineering including decking and fire protection will typically cost 5% to 7% less than a concrete framing system on a national basis.

Sustainability is structural steel's middle name. Structural steel is the most recycled material on our planet - today's structural steel is made of 88% recycled product, is fully recyclable in the future and can be reused without further processing. Energy used in the production of structural steel has been reduced by 9% in the past 10 years and over 30% in the past three decades.

Building owners and managers are always faced with changing requirements and a composite steel frame can be easily modified to satisfy existing or new tenant changing requirements such as increased floor loads for storage and equipment, new openings for mechanical equipment and vertical shafts for floor-to-floor staircases.

Steel structure buildings optimize building space efficiency through the use of slender columns maximizing useable floor space, longer spans for open, column-free spaces and the integration of HVAC systems into structural spaces allowing reduction of floor-to-floor heights.

Muyang Steel Structure

As a leading supplier of quality steel structures since 1996 we have forged a name for ourselves in this challenging sector by focusing on our Client's needs and the specific requirements and conditions within which our pre - engineered steel buildings will be used.

MYSS is certified ISO: 9000 2008 for Design, Manufacture, Fabrication, and Installation of Steel Structures and all divisions and products, including installation, turn-key projects, and After-Sales Service. We are also a certified Grade 1 Structural Steel Fabricator, and Grade 2 Integrated Engineering & Design Company.

Our prefabricated steel structure buildings are all designed and manufactured as tailor made, once off, steel structures to our Client's specific requirements. And, there's no extra cost for those tailored alterations in order to have the exact steel structure to suit your needs. Each and every one of our steel buildings is custom built to your exact specifications.

In order to keep with its corporate spirit featuring innovation, responsibility, cooperation and efficiency, Muyang will continue its persistent efforts aimed at “laying a solid foundation for a century’s glory by creating a world-class brand”.

Muyang Steel Structure Project

Steel structure is a structure which is made from organized combination of structural steel members designed to carry load and provide adequate rigidity.

Structural member is physically distinguishable part of steel structure engineering with independent structural function, e.g. member, element, cable and their combination.



Why use Muyang steel structure?

High strength
The high ratio of strength to weight (the strengthen unit weight);

Excellent ductility and seismic resistance
Withstand extensive deformation without failure even under high tensile stress;

Elasticity, uniformity of material
Predictability of properties, close to design assumption;

Ease of fabrication and speed of erection

Susceptibility to corrosion
Maintenance costs / thin-walled structure

Loss of strength at elevated temperature
Fireproofing costs

Susceptibility to buckling
Slender member in compression

Fatigue and brittle fracture



Business Scope:
Long-span structures;
Multi-storey & high-rise buildings;
Steel structure buildings of heavy duty plants;
Tower & mast structures;
Portal frames;
Bridges;
Infrastructures;
Deployable structures;
Generalized structures: mechanical

Fast and Efficient Service

"Golden Services"---- Since 2007, Muyang have started the activity of “Golden Services” to serve customers door-to-door, solving the practical problems for customer on-site and training them in accordance with the use of equipment at the same time. 

Muyang Steel Structure Info

Muyang is one of the large steel manufacturing companies, which has a national steel structure engineering contractor qualification and special steel structure design qualification, passing IS09001 quality system certification and has won the national steel product tracking inspection unit, Jiangsu Province construction steel top ten enterprises, "China famous Trademark", "Chinese famous brand" title. Muyang provides full service for many customers at home and abroad with industrial plants, and more high-rise residential, public buildings, large-span steel structure, tunnel bridge steel, oil steel, shipbuilding steel and marine power, transportation and other special steel structure design, production and installation.

The company has three major steel production bases of Yangzhou, Huai'an, Jiangsu, Chongqing Yongchuan, with more than 50 advanced mechanical processing equipments and maintenance of production lines, production capacity of 180,000 tons. The main products include H-beam, steel truss, box beams, box columns, lattice columns, pipe trusses, columns and other steel structure buildings with cross products, and transportation projects such as tunnels, subway engineering steel, steel sheet and other specialty steel products.

Business Scope:
1. Industrial factory building;
2. Multi-story steel structure workshop, office building, civilian construction;
3. High rise steel structure building (residential houses, office building, etc);
4. Large span steel structure (airport, gymnasium, conference hall, etc);
5. Bridge and road;

Muyang Steel Structure around the World

Steel is widely used as a building material. This is because of a number of factors including its mechanical properties, availability in a variety of useful and practical shapes, economy, design simplicity, and ease and speed of construction. Steel can be produced with a variety of properties to suit different requirements. The principle of the steel structure buildings requirements are strength, ductility, weld ability, and corrosion resistance.

Muyang Steel Structure is the world's leading manufacturer of large steel structure, with top steel structure engineering contractor intelligence, and has passes the IS09001 quality system certification for many domestic and foreign customers to provide industrial plants, multi-level residential, public buildings, large-span steel structure, tunnel bridge steel, oil steel, ship building steel and marine power, transportation and other steel structure engineering, fabrication and installation services.

Since year 2012, due to the old plant relocation fulfilled at the same time, the project works progress becomes tight, as well as multi-unit cross construction; Muyang always finds ways in order not to delay the progress of other construction units. Therefore, Muyang has obtained praise from many fraternal companies.

The Advantage of Steel Structure

The advantages of steel structure in safety problem are steel has a known, uniform strength when it compared with the strength of concrete structure that changed based on a mixture of cement and the water. Because manufactured in workshop, steel have uniform quality and accuracy of the size than concrete material. Steel is also very hard, so even though calm has reached a point because the burden of the bridge, steel can still return to the original form, with different concrete that is very fragile, will intensify once he cracked. Steel structure engineering is not problematic, such as concrete, which have a tendency to crack when the appliance because of the effect of harden. In this case, the steel bridge better than the appearance of concrete. In the case of an earthquake steel also show greater resistance to such tremors.

Muyang steel structure is the world's well-known large manufacturer of steel structure buildings with top contracting qualifications and passes the IS09001 quality system certification. Muyang steel structure provides for many global customers with industrial plants, multi-level residential, public buildings, large-span steel structure, bridge tunnel steel, oil steel, shipbuilding steel and marine power, transportation and other special steel design, fabrication and installation services.

Steel Structure Success Stories

Muyang Steel Structure is the world's leading manufacturer of large steel structure, with top steel structure engineering contractor intelligence, and has passes the IS09001 quality system certification for many domestic and foreign customers to provide industrial plants, multi-level residential, public buildings, large-span steel structure buildings, tunnel bridge steel, oil steel, ship building steel and marine power, transportation and other special steel design, fabrication and installation services.

Muyang has successfully implemented thousands of large and medium steel works, in the United States, Japan, China , Saudi Arabia, Brazil, Thailand, Malaysia, Egypt, Sudan, Pakistan, South Africa, Kazakhstan, Libya and other countries and regions, including public buildings, multi-rise steel buildings, heavy-duty steel construction, light steel construction, transportation and other special steel. Typical customers: U.S. Belem, Russia GRIGOROVICH, Brazil MASTER AGROPECUARIA, Thailand KCF, Egypt AL-VATANIA, Pittsburgh Metro , Sudan MATTHEW, Japan Tokyo subway, Suning Group, Huai'an Airport Terminal, Yancheng Sports Center, Shanghai Maritime Research Building and so on, among them, dozens of projects obtained steel quality engineering award. Muyang steel structure engineering world-class technology and first-rate product quality obtains highly praise by customers around the world.

Muyang's Goal on Steel Structure

Muyang is managed by dedicated and qualified professionals who are committed to understanding and serving the needs of our clients. Muyang is known for the quality of its products and services and for its attention to safety and we are determined to maintain our high standards through continuous improvement of processes and procedures. Our organization and all the plants are ISO 9001 certified.

Muyang specializes in the cost effective building of steel structure buildings for churches, factories, warehouses, hangers, shopping centers and offices. We pride ourselves in honesty and integrity. We offer an in house detailing and architectural studio enabling us to assist our customers from the early design stages right up to the final construction of their project.

We supply and erect steel structure engineering for end-user clients, and also sell turnkey solutions wholesale to property developers and specialize in the design of structures, using digital rendering tools on both architectural- and engineering-driven projects. But the company is also equipped to oversee the full erection and sheeting of the structure.

High quality, timely delivery and satisfied customers have been the key to our success. We have worked hard to establish a long-term business relationship with our customers who have responded by coming back repeatedly for their project requirements. If you are one of these customers, welcome back. If you have not previously worked with Muyang, we would be delighted to hear from you and look forward to serving you.

Steel Structure Solutions

According to customer solutions demand for various types of steel structures, Muyang can provide a variety of steel structure solutions:
● steel public buildings
● multilayer steel structure construction
● high-rise steel buildings
● heavy-duty steel construction
● lightweight steel construction
● Traffic specialty steel (eg steel form, etc.)…..

1. Steel Public Buildings

Airports, exhibition centers, sports stadiums and other large-span space-based truss, truss building, structure complex and large span, unique appearance, with pipe truss, square truss, and steel truss are the main structure.

2. High-rise steel buildings

Mainly steel, steel plate welded into components, and then bolted, welded structural system. Common steel form, steel form, concrete core wall, steel plate shear wall structure are used in high-grade office buildings, high-rise industrial plants, steel structure buildings, residential, significantly reducing building its own weight and construction costs.

3. Heavy-duty steel structure construction

Used in large industrial plants, steel structure engineering, heavy-duty H-beam, box girder, steel / steel lattice columns as the main structure.

4. Light steel structure construction

Widely used in all kinds of light industrial plants, storage room, supermarket, etc., to forming, welding H-beam as the main structure, providing a large span of space.

Muyang SWFL Vertical Ultra-fine Pulverizer

SWFL D series vertical ultra-fine pulverizer is a new type of equipment for large-, medium- and small-sized feed mill to process various coarse ground materials after preliminary cleaning, magnetic separation and mixing, such as corn, sorghum, rice, wheat, soybean meal, fish and shrimp, so as to obtain the materials in superfine particle size as required. It is especially suitable for fine grinding or ultra-fine grinding of feeds for prawn, turtle, eel and young animals.



It is characterized by compact structure and small floor space required. It is structured without any sieve, both grinding and grading systems are put in the same closed space, so that they can be finished at one shot and the energy loss due to over-grinding can be reduced.

With a hydraulic opening mechanism, the grinding chamber of the grinding machinery can be quickly opened and ease of maintenance. The grading system is an optimized design with high grading efficiency. The particle size of grind is uniform and adjustable, and the temperature of product is lower thanks to aspiration and pneumatic conveying. The ground particle size of 60-200 mesh is continuously adjustable, so the special requirements of ultra-fine grinding can be fulfilled. A special silencer is equipped, which can greatly reduce noise. The unique anti-bridging feeding device can protect the in-taken materials from bridging. It runs stably with litter vibration.

Muyang SWFL Vertical Ultra-fine Pulverizer

SWFL D series vertical ultra-fine pulverizer is a new type of equipment for large-, medium- and small-sized feed mill to process various coarse ground materials after preliminary cleaning, magnetic separation and mixing, such as corn, sorghum, rice, wheat, soybean meal, fish and shrimp, so as to obtain the materials in superfine particle size as required. It is especially suitable for fine grinding or ultra-fine grinding of feeds for prawn, turtle, eel and young animals.



It is characterized by compact structure and small floor space required. It is structured without any sieve, both grinding and grading systems are put in the same closed space, so that they can be finished at one shot and the energy loss due to over-grinding can be reduced.

With a hydraulic opening mechanism, the grinding chamber of the grinding machinery can be quickly opened and ease of maintenance. The grading system is an optimized design with high grading efficiency. The particle size of grind is uniform and adjustable, and the temperature of product is lower thanks to aspiration and pneumatic conveying. The ground particle size of 60-200 mesh is continuously adjustable, so the special requirements of ultra-fine grinding can be fulfilled. A special silencer is equipped, which can greatly reduce noise. The unique anti-bridging feeding device can protect the in-taken materials from bridging. It runs stably with litter vibration.

Muyang SWFL Vertical Ultra-fine Pulverizer

SWFL D series vertical ultra-fine pulverizer is a new type of equipment for large-, medium- and small-sized feed mill to process various coarse ground materials after preliminary cleaning, magnetic separation and mixing, such as corn, sorghum, rice, wheat, soybean meal, fish and shrimp, so as to obtain the materials in superfine particle size as required. It is especially suitable for fine grinding or ultra-fine grinding of feeds for prawn, turtle, eel and young animals.



It is characterized by compact structure and small floor space required. It is structured without any sieve, both grinding and grading systems are put in the same closed space, so that they can be finished at one shot and the energy loss due to over-grinding can be reduced.

With a hydraulic opening mechanism, the grinding chamber of the grinding machinery can be quickly opened and ease of maintenance. The grading system is an optimized design with high grading efficiency. The particle size of grind is uniform and adjustable, and the temperature of product is lower thanks to aspiration and pneumatic conveying. The ground particle size of 60-200 mesh is continuously adjustable, so the special requirements of ultra-fine grinding can be fulfilled. A special silencer is equipped, which can greatly reduce noise. The unique anti-bridging feeding device can protect the in-taken materials from bridging. It runs stably with litter vibration.

Muyang Feed Processing Systems

Muyang feed processing systems are used by thousands of companies around the world to produce poultry & livestock and aqua feeds, pet food, premixes and concentrates. Muyang has so far designed and constructed over 3000 feed milling machines of different kinds throughout the world.



Feed manufacturers know they will rely on not only the feed equipment but also the support that accompanies it. A service network combining local presence with global expertise lowers feed millers' operating costs and increases plant capacity utilization. Muyang's point of departure is to provide complete and multi-disciplined supports from process design with the up-to-the-minute technology, unsurpassed machinery and plant control products up to excellent after-sales service, with an aim of producing the highest quality feed products and gaining more profit for the clients. That's why Muyang has established a long-term strategic partnership with 18 feed companies out of the top 20 in China, and enjoys the same prestige worldwide.

STHJ Series A Type Paddle Molasses Mixer

STHJ Series Type Paddle Molasses Mixer is widely used in feed, cereal, food, chemicals, medicine and pesticide industries, and suitable for mixing mash feeds (adding molasses) in feed mill, so that all the ingredients can be uniformly distributed and the quality of the compound feeds can be ensured.

STHJ Series Type Paddle Mixer is a horizontal continuous type mixer. It is featured of new rotor structure, good mixing homogeneity and no any dead angle during mixing. The clearance between the rotor and the machine casing is adjustable. It is equipped with a clearing gate to facilitate cleaning inside the working barrel. With a molasses intake in it, the machine is characterized by reasonable structure, handsome appearance, and easy operation and maintenance.

It is also important for the material characteristics, the particle size of intake ingredient particles should not exceed 8mm, and the bulk density is should be 0.15～0.8kg/dm. Also, the moisture should not exceed 18% with the molasses mixture temperature of 32~38℃. Relative humidity can't exceed 90%, and the elevation should not exceed 1000m. It is better for stable working voltage with a deviation not more than ±5%.

Muyang also provide you with steel silo project, you can visit our site and leave messages there.

Muyang Steel Structure Company Informations

Muyang Steel Structure Company has 4 shops. The main shop has 13 production bays with an area of 47,000m2. The fabrication target is 170kg/m, or approximately 8,000 metric tons in full production. Due to a mixed-use of the facility during 2012, the shop is running at 50% capacity, able to produce about 4000 tons per month of medium or mixed weight structural steel.

Fabricating at the rate of 10 tons per man, the shop currently maintains 400 workers. The staffing arrangement is based upon the project sales, therefore if any large project is awarded, additional staff will be added to increase output by 1000 tons. In 2013 after completion of the 3rd production base, the steel structure shop will run at full production.

Muyang Group has attained an "AAA" long-term credit rating by the Industrial and Commercial Bank of China and has extremely strong capacity to meet its financial commitments. Our group has been evaluated for its credit worthiness and ability to pay back any debts in the event of any default. The high rating indicates the opinion that Muyang has a low-risk of default, based on ICBC Bank of China analysis of Muyang history, and analysis of long-term economic prospects. Muyang will supply goods and services conforming to the project specifications and agreed quality plan.

If our company fails to perform according to the specifications within the stated time, we will take responsibility and do what is required to correct any problems and comply. Our current guarantee amount is USD $40,000,000 Million. All goods/services manufactured are subject to inspection and testing. If goods/services are defective or fail to meet the bid specifications, Muyang will repair or replace the effected products.

The SJHA4A Double-circle Paddle Mixer

Muyang double-circle paddle mixer is independently researched and designed by Muyang and wins international patent technologies. It has advantages of quick mixing time, high homogeneity and no residues.

The rotor of the SJHA4A Double-circle paddle mixer is equipped with two layers of paddles (4 big paddles with special angles in the outer layer and 4 small paddles with special angles in inner layer). The outer big paddles drive the materials to turn over leftward and rightward in fast-flow zone and make continuous circular movement in the through at all directions, keeping material mix evenly under the effect of strong convective mixing; the small paddles also greatly increase the convective mixing at slow-flow zone. In addition, the two layers of paddles can increase the effect such as diffusion, shear and impulsion in materials, so as to obtain fast mixing with high homogeneity.

The mixing machinery consists of rotor, machine body, machine housing, speed reducer, upper cover, liquid application device, access doors, etc. The rotor is installed on the machine body through the two bearings (with pedestal) at the shaft ends. It is driven by the output hollow shaft of the reducing motor. A discharge gate is installed at the bottom of machine housing, whose opening or closing is controlled by pneumatic cylinders according to the mixing cycle. The access doors for cleaning and maintenance are on the upper part of machine housing. There are two feeding inlets on the top cover for adding major materials and additives. The air-return duct is installed between top cover and the machine bottom.

Main Parts on Muyang PHGM200 Rice Extruder

The PHGM200 rice extruder mainly consists of a belt pulley and a hood shield, a main motor, an extruding device, a cutting device, a disassembling tool, an extruder base, a lubricating oil-way and a motor base etc.

Cutting device

By dint of side hanging, the cutting device can fasten the replacement of knives. The cutting device is composed of a knife assembly, a power unit and a supporting bracket. Generally, hard blades are used for this cutting device, and they can be adjusted forward and backward or upward and downward.

Extruding device

The extruding machine device is composed of a bearing pedestal, a feeding section, the first barrel section, the assembly of extruding chamber, a screw rotor and a discharging device.

Installation of electric control part

Adapted electric control cabinet of the equipment should be put on the chute side of the bypass, better to be 0.8 m ~1.0 m away from the bypass, without any spacing object in between.

It is incorrect to install the control cabinet far away from the principal machine or even right in the face of the material outlet of the feed extruder, or on the side of the main motor, because the operators must pass by the material outlet of the extruder to carry out operation. This violates the common practice that "it is inadvisable to stand in the front of the material outlet of the extruder" and may cause potential safety hazard.

For the installation of on-site power supply, the connection can be carried out according to the drawing of electrical control, and the motor can be adjusted for its forward and backward rotation. There is an indication mark of rotation direction on the hood shield of each motor.

In addition, for the layout of wire casing for the principal machine, we should consider that there may be water on the ground around the extruding machinery, so the wire can be laid overhead or embedded under the ground instead of placing at the ground beside the extruder, otherwise long period of water invasion into the wire casing may cause disastrous aftereffect and the exposed wire casing on the ground is also not favorable for site cleaning.

Muyang MUZL350T Pelleting Machine

This pelleting machine mainly consists of a feeder, a conditioner and a principal machine of pellet mill (mainly including a main motor, an Assembly of rotor, a ring die, press rollers, an assembly of cutting knives and a lubrication system).

The principal machine is composed of main motor, magnetic plate, Assembly of rotor, pelletizing chamber (including assembly of press roller, assembly of front plat and ring die), machine body, door and so on, Fig 1.5 shows the section of MUZL350TA type pellet mill.

Working procedure:

The mash with water content less than 18% as required enters the feeding auger from the pelletizing chamber in a proper feeding amount through adjusting the rotating speed of the frequency control motor, and then enters the conditioner. The material will be sufficiently mixed with steam in the conditioner by stirring paddles of the conditioner, and molasses or oil can be added through the feeding inlet for molasses if necessary. The temperature of compound mash is normally controlled within 65~95℃and the humidity 14~17% based on different formulas, and finally the material enters the pelletizing chamber and is pelletized to pellets by the press rollers and the ring die.

Muyang Vertical Emery Roll Rice Whitener

For Dampening Iron Roll Rice Whitener, the water is pumped by water pump from upper end of hollow shaft and atomized under effects of jetting air flow. The materials surface can be covered by a layer of water film, thus, the rice bran can be softened and then removed effectively. And the rice in whitening chamber can be cooled and the good polishing result of the white rice can be obtained.



Main features of Muyang MNMP21A Vertical Iron Roll Rice Whitener

1) The iron roll and the screw head adopt the split structure, which can be replaced conveniently.

2) This machine structure is compact and multi-machines can be in series for lightly whitening, without increase in hoisting equipment, thus can reduce the land use area and reduce the costs.

3) The feed machinery serving several purposes, not only can be used as iron roll to whiten brown rice, but also can be used as a polisher when it is equipped with a dampening device.

Requirement for installation site

The foundation for installing the grinding machinery should be strong enough to support the machine weight (see “weight to be transported”). The rice whitener occupies a land of 1.5×1.3 m2, around which 1 m wide empty area should be kept for operation and maintenance. In addition, 1 m high space should be kept above the machine for vertically taking out main shaft to replace bearing. The gate should be provided at feed inlet for guaranteeing the uniform flow rate.



The rice whiteners can be used in group for reducing the hoisting equipment and land use area.



During installation, use M16 foundation bolts (6 pieces) to fix the grinding machine and checkup whether machine for horizontality. If necessary, place an iron plate with certain thickness under the pedestal, in order to ensure leveling. The feed machine vibration can be avoided and the noise can be reduced by uniform stress. The floor shall be bored for installation of discharge pipe and electric cables.



1-Iron roll rice whitener (Dampening)
2-Iron roll rice whitener
3-Emery roll rice whitener
4-Feed inlet 5-Discharge outlet

Muyang Automatic Feeder

This Muyang automatic feeder mainly consists of a box body, a feeding roll, an adjusting plate, a magnetic gate mechanism, an impurity discharging hopper and others, as shown in Fig. 1.

Working principle

The material enters the trough of the feeding roll from top and is brought to the material outlet through a rotary roll and an adjusting plate, therefore, the feeding is continuous and uniform. A plate magnetic separator is mounted near the material outlet and can remove iron impurity from materials.

The feeding amount can be automatically adjusted. The control principle is as follows: A sensor detects the working current of the grinding machine real time, and transmits the signals to the controller of frequency conversion motor of the feeder, and then adjust the opening of the adjusting plate and the rotating speed of the frequency conversion motor through comparison with set current, so as to automatically control the feeding amount.

Installation procedures, methods and attention points

For installing the principal machine of the feeder, flanges are all used for jointing the upper inlet with the gate and the lower outlet with the hammer mill. A soft connection is recommended and the machine body should be kept horizontal. After installation, the feeding roll should be checked whether it rotates in the box body flexibly without any hindrance.

It is recommended to hang the controller onto the wall in the power distribution room for the grinding machine, and the screen is about 1.6m apart from the ground, for the convenience of operation and maintenance.

The current transformer delivered together with the controller should be mounted in the power distribution cabinet for the grinding machinery, and any one of power lines L1, L2 or L3 for the grinding machine should pass through the mutual inducting coil.

Functional Inspection Prior to Test-run

Before leaving the manufacture plant, a perfect test-run has already been conducted to the mixing machine. The initial test run in the user's factory cannot be done until following checks have been conducted. There should be no abnormal contact inside the mixing chamber or between the other accessories. All connecting points must be checked carefully to ensure there is not any looseness. Check the rotors for flexible rotation, and make sure there is not any abnormal sounds resulted from blockage, collision or abrasion etc. Check the rotors for their rotating directions matching with that indicated, for this it may need to start the motor for a short time; meanwhile, check the motor for any change in its rotating direction.



Check whether the emergency stop switch is in good working condition or not, safety switch of the access door As a part of the safety control of the mixing machinery, whether the safety switch of the access door works normally or not is directly related with the safety of the mixer, so the safety switch should be frequently checked for its functioning. Check the discharge gate mechanism for flexible rotation. When opening or closing the gates, there should be no abnormal sounds resulted from blockage, collision or abrasion etc.

Before each commissioning or after each unexpected interruption, the residual materials in the mixer chamber must be emptied. Only when the access door is closed and other related equipment is running, the principal machine of the paddle mixer can be started, and do not feed materials into the mixer until the rotor is running normally. Inch the mixer to check for any abnormal situation. If any, correct it. The temperature rise of bearing should not higher than 35℃ when ideal running for 0.5h, and the lubricating and sealing function still perform well. Check the running condition of the motor, which should be consistent with that required in its instruction. Screws, fasteners and lubricating points should be checked for normal performance after ideal running for 1 hour.

Extruding Chamber and Feeding Device on Muyang PHG135 Extruder

Being an important part of extruder, extruding chamber is composed of main shaft, extruding screw rod, tapered pressure ring, wear ring and extruding sleeve. The extruding screw rod adopts segmental structure, equal diameter and variable pitch form to meet the demand for flexible assemble of different screw rods according to different raw materials. Configure the tapered pressure rings with different diameters to adjust and control the temperature and pressure in the chamber during extruding process. The extruding machine sleeve is composed of a feeding extruding chamber part, two middle extruding chamber parts and a discharging extruding chamber.

The feeding device on the extruding machinery is composed of mixing chamber, screw feeder, retarding mechanism and variable frequency motor. The rotating paddle type rotor prevents the blocking in feeding hopper. Using the infinitely variable speed screw feeder, can adjust the feeding speed flexibly to ensure the normal running of the extruder.

For some extruded fee (except extruded soybean), they must be cut into pellet feed with a certain length. The cutting device is composed of cutting knife and variable transmission. Control the cut length through the rotate speed adjustment of the cutting knife. The variable transmission adopts electromagnetic variable speed motor; the rotate speed can be adjusted in a range of 200-1200 r/M.

The dry-way extruder makes use of friction as the only source of the heat energy. It is entirely different from other getting heat energy methods, such as utilizing steam and other preheating device. The main parts of extruding machines are screw rod and extruding chamber, the material sprayed out from the outlet with the help of the heat energy and the high pressure, at this moment, the temperature and pressure has nosedived, the material will expanded due to the abrupt change from the high temperature and pressure to the normal temperature and pressure, the starch structure will be destroyed due to the evaporation of water, the expansion degree is related not only to the starch content but also the temperature, pressure and water content.

Muyang SJHS3 Double-circle Paddle Mixer

Thanks for purchasing Muyang SJHS3 Double-circle Paddle Mixer. This Operation Manual is an important technical document for the safe and correct operation of SJHS2A Double-circle Paddle Mixer. Prior to operation, please read over this operation manual carefully, well know the attention item for safety, different performances, requirements to installation and operation etc. of this mixer so that you able to adroitly operate and use this machine, and create more benefits.

This mixing machine must be operated in accordance with this Manual. Improper operation or breach of the operation regulations will cause severe loss. Prior to use, please read through this Manual and well understand the signal words, especially the DANGER points. Operation and maintenance personal should read carefully this Operation Manual prior to use and then carry out the operation and maintenance of the equipment.

Keep the Manual in a place near the mixing machinery, so as to look up it at any moment. Please operate and maintenance this machine with thoroughly understanding this Operation Manual. Please contact our Company to purchase a new Operation Manual for this machine if there is any omission or damaged of this Manual. If the machine is transferred to the third party, please over this Manual together with the machine. Attention, Following are some explanations about the application and the warranty of this machine.

1. Application: For mixing powdery and specific granular material.
2. Content of Warranty: Mixer body
3. Warranty period: within 1 year after purchase of the equipment, except wearing parts.

Muyang Superb Steel Structure

Specialized technical team: Muyang Steel Structure Co. employs over 100 engineers who specialize in the design of large-size industrial building, civil engineering, public utility buildings, special structure, and special steel structure buildings.

Meticulous product management ensures excellent product and projects. In order to create China's top-class structural steel fabrication line, Muyang has procured full range or capital equipment from Japan, USA, Switzerland, and Germany. This has provided mature fabrication processes and employs highly skilled workforce capable of excellent fabrication and meticulous quality assurance from all details.

Human Resources Management
Based on the people-oriented principle, Muyang has formulated a complete human resources management procedure and has developed an "Employee Development Plan", which is aimed promoting the development of each employee.



Recruitment
In order to maintain continuity of its technical competitive edge, Muyang Steel Structure Co. recruits mature technical staff from all over the world in addition to admitting fresh graduates from prestigious universities each year.

Employee Development
Muyang Business School contributes to the cultivation of specialized technicians, provides trainings targeted at different job requirements, and effectively heightens employee work-related skill and professionalism.

Excellent Performance Management
Since its founding in 1996, Muyang has stuck to its "excellence and efficiency" objective and has developed an effective management procedure.

Ring Die of MUZL 610TW Type Pellet Mill

It is essential to select ring die with correct material quality, structure, and dimension of die holes for improving the efficiency of the pellet mill. The ring die is usually made of forged material of high chrome alloy by vacuum heat treatment after being machined, and it is of good abrasion resistance and corrosion resistance.

Types of die hole structure of the ring die include:

Standard cylindrical holes
Holes with a conic inlet
Special die holes such as square holes, conic holes, and special number of holes

The ring die should be replaced as following procedures:
1. Ensure the power of the pelleting machine is cut off, the cutting knives are screwed off from ring die and the pelletizing chamber is opened before replacement.
2. Install the lifting device of the ring die to the lifting beam at the top of the machine body, ensure that the eye ring is fixed, and tighten the butterfly bolt to prevent the lifting beam from drawing out entirely.
3. Remove the rotary feeding cone and conic die flange.
4. Regulate the press roller to the place far away from the ring die.
5. Dismount the access door at both sides of the machine body so as to remove fastening bolts of the ring die.
6. Loosen the fastening bolts of the ring die
7. Screw in three top die bolts of ring die, and turn same number of turns by the wrench, thus the ring die can be ejected out of the driving flange.
8. Take out the whole ring die from the driving flange and place it on the press roller.
9. Lift the ring die by lifting device until pushing it wholly out of the pellet mill, scratching the surface of press roller should be avoided during this process.
10. Check whether the scraper on the front support is worn excessively or not after removing the ring die.
Installation of the ring die（see fig.2.4、2.5、2.6、2.7）：





The ring die should be installed as following procedures:
1. Turn off the power, adjust the cutting knives at a required distance to ring die for preventing the ring die.
2. The procedures for ring die assembling are contrary to the disassembling procedures.（for the details see as follows）.
3. Install the lifting device of the ring die to the lifting beam at the top of machine body and ensure that the eye ring is fixed, and then tighten the butterfly bolt to prevent the lifting beam from drawing out entirely.
4. Regulate the press roller to the place far away from the ring die.
5. Remove the access doors from two sides of the pellet mill, and screw the top die bolts into the bolt holes on driving flange of ring die.
6. Clean the end face, conic matching surface and inner surface of the ring die completely, and thoroughly clean the conic matching surface of driving flange of the ring die and end face of rotor.
7. Install the four centering pins to the ring die and then fasten it.
8. Fasten the tackle hook on the screw hole of the ring die and lift the ring die to corresponding installation height.
9. Move the ring die to the driving wheel flange, rotate the rotor to allow the centering pin of the ring die to align with the through hole of the rotor and ensure it is equally installed in the driving wheel flange of the ring die.
10. Fix the ring die with the nut, and then disassembly the lifting device of the ring die.
11. Screw in the other four fastening bolts for ring die and screw down them with centering-pin fastener of ring die by torque wrench on the cross in order. Refer to Fig. 2.8 and Torque List of Ring Die Fasteners for torque value.
12. The ring die must be assembled upright and aligned by dial indicator.
13. Screw the top die bolt slightly until it reaches the ring die.
14. Adjust the clearance between the three press rollers and the ring die properly（please refer to the section 2.3.8.4 for the adjustment of the press roll）.
15. Install cleaned feeding conic pulley fixing ring and rotation feeding cone to the outer end face of the ring die successively.
16. Install the access door at both sides of the pellet mill body.
17. Close the pellet mill gate.
18. Adjust the cutting knives to required distance from the ring die.

The ring dies of pelleting machines can be installed positively and reversely, however, it is suggested to install the ring die reversely in regular for operation such as after producing 1000 tons, so that the surface of the ring die and press rollers can be worn equably. It is recommended to use our fasteners for the ring die and apply lubricating oil or grease on the screws for a longer service life of the ring die when fastening.

Main Structure and Working Principle on Pellet Mill

This machine mainly consists of a feeder, a conditioner and a principal machine of pellet mill (mainly including a main motor, an assembly of rotors, a ring die, press rollers, an assembly of cutting knives, roller adjusting device, a lifting device for the ring die and a lubrication system) (Fig 2.1).



1. Principal machine of the pellet mill
2. Conditioner
3. Feeding auger
4. Driving unit of conditioner
5. Main motor
6. Motor of conditioner
7. Driving unit of feeder
8. Assembly of cutting knife
9. Lubricating system
10. Machine base
11. Rotor
12. Bearing at the rear end
13. Bearing at the front end
14. Inner scraper
15. Ring die
16. Assembly of roller
17. Deflector

The working procedure is shown as follows:

The mixed mash enters the feeding auger from the pelletizing chamber in a proper feeding amount through adjusting the rotating speed of the frequency control motor, and then enters the conditioner. The material will be sufficiently mixed with steam in the conditioner by stirring paddles of the conditioner, and molasses or oil can be added through the feeding inlet for molasses if necessary. The temperature of conditioned compound mash is normally controlled within 65~95℃ and the humidity 14~18% based on different formulas, and finally the material enters the pelletizing chamber and is pelletized to pellets by the press rollers and the ring die.

Installation of Extruder

The principal machine of extruder is the heaviest equipment in the whole system, and also considering the main motor, thus it is demanded highly to the bearing capacity of foundation. The extruder cannot be directly put onto foundation during installation, it is required to underlay a frame, which is made of channel steel according to the size of extruder base, at the bottom of equipment base, and use the expansion bolt to fix with foundation. Ensure the plainness of the whole frame when making the base frame, especially the principal machine base and the mo tor base must be at the same plane. This is especially important for the extruding machine with driving device of elastic coupling directly connected with reducing gear box.



Because the main motor and the reducing gear box are directly connected with a drum type coupling, it is necessary to ensure the coaxiality between the output shaft of main motor and the input shaft of the reducing gear box during installation. Comparatively, it is convenient to adjust the position of main motor for adjusting the coaxiality.

The coaxiality between the two shafts can be also ensured by lying channel steel under the extruder.

Muyang Chaoyue SWFP Series Fine-grinding Hammer Mill

"Chaoyue" Series Fine-grinding Hammer mills can be used for grinding various granular feedstuffs, such as corn, sorghum, wheat, crumbled oil meals and etc. They are applicable for grinding granular raw materials in various large- and medium-sized livestock feed mills, alcohol plants, citric acid plants, food factories and cooking oil mills.

With advanced design of water-drop shaped grinding chamber and structural configuration for regrinding, it is good for increasing the machine's capacity. Optimized array of hammers makes the capacity higher. The design for air supplementing in axial direction effectively destroys the circumfluent material layer, it is of the benefit of grinding and screening, and it also do good to bearing cooling. Various accurate detection instruments including dynamic balancing device with high precision ensure much smoother running, lower noise level and more perfect performance.

The rotor on the hammer mill which is capable of both coronation and reversion greatly increases the service life of wearing parts. With the movable full-size access door and interlock device ensure safety and operational convenience. The coupled screen holding-down mechanism makes the screen segments be replaced conveniently and reliably. Equipped with the feeder of either advanced converter impeller type or automatic type, the grinding machinery works more reliably. The gap between hammers and screen can be adjusted to suit the highly efficient grinding of different materials. In order to bring the performance of the hammer mill into a full play, it is recommended that the feeding inlet size shall not be over 8mm and material moisture content shall not be more than 16%.

Safety Points While Operating the Grinding Machine

It is prohibited to open the operating gate until the grinding machine has been fully stopped; the safety mechanism of the access door is equipped with a locking cylinder for prevention of opening and a proximity switch for prevention of starting up after the door is opened. Do connect the electric circuit and air piping as required, ensuring that the cylinder locks the access door when the equipment is running, and the door cannot be opened until the equipment is stopped absolutely, and the equipment cannot be started up when the access door is opened.

It is forbidden to approach the rotating components by finger during running of the grinding machinery. The inspection, maintenance and cleaning work can only be done after the pulverizer rotor has been completely stopped.

If the coupling bolts between the convex cover and the grinding chamber and between the discharge outlet and the air pipe are not removed, do not pull the handle of the manual hydraulic pump so as to avoid any damages of the equipment.

When choosing the grinding machines with a hydraulic opening mechanism, it is a must to ensure there is no leakage at joints of each pipe, to avoid any danger due to pressure loss during operation. Customers should not adjust the guiding counterbalance valve at will, so as to avoid possible dangers.

When using the hydraulic opening mechanism to open the top cover for repair, do not turn the unloading valve of the manual pump at will, so as to avoid personal injury resulted from falling of the top cover.

Before power cut-off, do not open the junction box of the motor, so as to avoid personal injury resulted from electric shock. Set the rotating direction for the motor strictly according to the rotation direction indicating mark, so as to avoid any damages of the equipment.

Prevent tramp metals or other foreign sundries from entering the grinding chamber, so as to avoid any damages to the hammer blades and geared rings.

Introduction on Extruding Principle

Firstly, the materials prepared and pulverized enter the feeding bin for bridge-breaking and are to be processed. When working, the feeder of the extruder continuously feeds the material in bridge-breaking feeding bin to the different diameter cylinder conditioner for conditioning, adds evenly, the continuous and metered steam, water and other liquids into conditioner while material is entering into it.

The material being conditioned for a certain period enters the feeding section of the extruding assembly for extruding, the material is conveyed from the feeding section, and the feeding section on the extruding machinery is mainly used for conveying the material to kneading section and primarily compressing the material; in the kneading section, the material will be gradually ripened or dissolved through strong stirring, mixing and cutting; the pressure and temperature will rise gradually after entering the final ripening section, and the material will be ripened further, the starch will be gelatinized further, the fat and protein will be modified and homogenized to form a non-crystal texture; finally, the material will be extruded and cut into shapes through the discharging assembly.

Three sections of extruding assembly can be adjusted as required by the production. The screw conveys the material to the whole expanding chamber, the mechanical energy of rotating screw will be transformed as heat energy through abrasion between material and parts of the extruder as well as internal abrasion of material. The rotating speed of the extruding screw is adjustable, and therefore, it is possible to adjust the extruding effect during the process according to processing requirement, so as to control the product density and ripeness.

When material is extruded to pass through the die holes in the end of the extruding machine chamber, doughy material will be processed to a certain shape. Because of the great push and mix of screw in the machine chamber, a certain pressure and temperature will be formed in material, so that the material will expand greatly when extruded from the die holes or when most of water is evaporated momentarily or lightly expanded because less water is lost. This can be realized through strictly control each operation parameter as required.

During production, material will be greatly expanded and kept in a corresponding shape and dimension depending on structural features of material.