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The operation method of the shaker beneficiation experiment, the shaker beneficiation is a process of sorting ore by means of asymmetric reciprocating motion of the bed surface and thin layer bevel water flow. The shaker has high precision and high enrichment ratio. After one sorting, the final concentrate, the final tailings and one or two intermediate products can be obtained. 1. Under the action of water flow and shaking action, the ore particles are loosely layered. The operation method of the shaker beneficiation experiment, the stratification of the ore particles is mainly due to the combined results of sedimentation stratification and separation stratification. The vortex formed by the horizontal flow of water flowing through the bed causes pulsation of the water flow, loosening the material and stratifying according to the sedimentation speed. The shaking of the bed surface makes the heavy mineral fine particles drill through the gap of the particles and sink to the bottom layer. This separation layering is an important feature of the shaker sorting. The stratification results are: coarse and light ore particles in the uppermost layer, followed by fine and light ore particles, again coarse and coarse ore particles, and the bottom layer is fine and heavy ore particles. 2. The movement of the ore particles on the bed surface and the separation of mineral particles at different levels in the bed layer have different movement directions due to different longitudinal and lateral movement speeds. (1) The lateral movement of the ore along the bed surface. The operation method of the shaker beneficiation experiment, under the action of the lateral water flow, the ore particles move along the lateral direction, the light and coarse ore particles move faster in the lateral direction, and the heavy minerals move slowly. Under the lateral water flow, the particles at the same level have larger particle size than the smaller particle size, and the density is smaller than the density. This difference in the movement of the ore particles is more pronounced due to the different density and size of the particles after stratification occupying different bed heights. The water flow has the strongest flushing force on the particles close to the height of the bed, so the coarse particles of the light mineral are first washed down and the lateral movement speed is maximum. As the bed moves toward the concentrate end, the height of the bed strip decreases, and the mineral particles that originally occupied the intermediate layer are constantly exposed to the upper surface. Thus, fine particles of light minerals and coarse particles of heavy minerals are successively washed out to form different lateral movement speeds. The heavy mineral fine particles located at the bottom layer have a small lateral movement speed. They are always pushed to the smooth area at the end of the bed surface, which is called the selection area. The opposite part of the bed is the roughing area. In the middle of the two, the bed is tipped out and the width is the backwashing area. (2) The longitudinal movement of the ore along the bed surface. The operation method of the shaker beneficiation experiment, the longitudinal movement of the ore along the bed surface is caused by the non-slip movement of the bed surface. The condition that the ore particles move relative to the bed surface is that the inertial force of the ore particles is greater than the friction of the bed surface. . In the operation method of the shaker beneficiation experiment, when the inertial force of the particles is less than the frictional force, the particles are accelerated together with the bed surface under the frictional force, as if the ore particles adhere to the bed surface. When the acceleration to the bed surface is increased to a certain value acr, the inertial force of the particles is equal to the frictional force. After this limit is exceeded, the friction is insufficient to overcome the inertial force of the particles, so that the particles move in the direction of the inertial force (opposite to the acceleration of the bed surface) relative to the bed surface. Acr is the critical acceleration of the particles, which is the acceleration of the bed surface when the particles start to move relative to each other on the bed surface. The acr is related to the density of the ore particles and the medium, and the surface properties of the shaker. When other conditions are fixed, the density of the particles is larger and the critical acceleration is also greater. Obviously, to make the particles move on the bed surface, the acceleration of the shaker motion must exceed the critical acceleration. The operation method of the shaker beneficiation experiment, now we will discuss the difference in the longitudinal movement of the two ore particles with different densities on the bed surface. It is assumed that the two ore particles have the same particle size and similar shape, but the density (?1a2 > a3 > a4) constitutes the fan-shaped zoning of light and heavy minerals. The wider the zoning, the higher the separation accuracy. The width is determined by the difference in the speed of movement of different ore particles in the transverse and longitudinal directions.
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