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.
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