Working principle of nylon spiral chute

According to the differences in specific gravity, particle size and shape between useful minerals and gangue minerals, the spiral chute generates a dynamic centrifugal flow film of pulp on the inclined plane of the spiral. In the comprehensive force field of gravity and centrifugal force, the separation of useful minerals and gangue is realized by using the gravity, hydrodynamic pressure and friction force of different particles. In addition to the downward spiral motion, the water in the spiral groove also makes a transverse circulating flow. The flow velocity in the upper layer is fast, resulting in large inertial centrifugal force, which is thrown to the outer edge of the groove.

The lower water flow adjacent to the bottom of the tank has slow rotation speed and small centrifugal force. Under the action of gravity, it flows from the outer edge to the inner edge, resulting in secondary reflux. The heavy ore particles in the pulp settle rapidly, gradually move to the inner edge along the convergent helix, and then produce in the form of concentrate. Light minerals settle slowly, are located on the surface of ore flow, have fast flow velocity and large centrifugal force. Under the action of transverse circulation, they gradually move to the outer edge along the spiral line of the expanding nylon spiral chute, and then output in the form of tailings.