Although the above-mentioned hydraulic classification equipment has the advantages of simple structure, low operating cost, small maintenance, less fluctuation of the input material, fewer factors that affect the classification index, and strong adaptability, the density, shape and settlement conditions of the particles have the advantages of The speed has an impact, therefore, the phenomenon of particle group mixing is more serious during classification, and the classification efficiency is not high. The more prominent problem is that these equipment occupies a large area and the processing capacity per unit area is low. For this reason, people have developed inclined plate (inclined tube) hydraulic grading equipment.
The working principle of the classifier is as follows: the slurry is fed downward from the vertical pipe, merges with the flushing water at the bottom and enters the tank. Sliding upwards, after passing the top of the cone, it falls into the sand discharge channel, and is subjected to the action of supplementary water. Finally, the coarse particles that fall into the bottom become sedimentation. The separation particle size can be changed by adjusting the flushing water, supplemental water, the amount of ore supply and the slope of the slope to meet the needs of different particle size materials. The height-to-diameter ratio of the equipment is generally 3~4, and the overflow discharge path is short, which can effectively avoid the short circuit of fine particles. The minimum separation particle size can reach tens of microns, and the classification efficiency can reach more than 70%.
