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Desilting bucket, also known as cone classifier, is a simple equipment for classification, desliming and concentration. Its shape is an upside-down cone. The ore feeding cylinder is set at the center of the liquid surface, and the bottom edge of the cylinder is submerged to a certain depth below the liquid surface. The pulp is fed into the central cylinder along the tangential direction, and flows out from the bottom edge after buffering. The outflowing pulp flows radially to the surrounding overflow weir. In this process, the coarse particles whose settling velocity is greater than the rising velocity of the liquid flow will settle in the tank and be discharged through the bottom grit. The fine particles enter the overflow tank with the surface slurry. The feeding particle size is generally less than 2mm. Grading particle size is 75pm or finer.

The mud separator has the advantages of simple structure, easy manufacture and no power consumption. Due to the large volume of the cone, it also has a role of ore storage in the production process. At present, it is mainly used to de-slime the raw ore before the hydraulic classifier to improve the classification efficiency; it is also installed in front of the grinding equipment for ore concentration and dehydration to improve the ore feeding concentration of the grinding machine; it is also used in various mines. Control the ore concentration and ore quantity before the mud sorting equipment.