There are four types of classfiers: high weir single spiral typr and double spiral type, submerged single spiral type and double spiral type.
Spiral classifier works based on the principle that the solid particles have different sizes and different specific gravities, which thus makes the settling velocity in the liquid different. In this process the fine ore particles float in the water and overflow, and the coarse ore particles sink to the bottom of the tank. It is a device for mechanical classification moving the material to the upper part. After that the classifier can filtrate the powder from the mill and then screw the coarse material into the feed inlet of the mill with the spiral blade. The filtrated fines are discharged from the overflow pipe.
The cyclone and cyclone group can almost meet the needs of all mines for classification, dewatering, desliming, slag removal, concentration, tailings dry discharge, etc., and its classification operation efficiency can be increased by 15%-25% compared with spiral classifiers. 70%-85%.
The fluid cyclone is a common separation and classification device, which is commonly used in the principle of centrifugal sedimentation. When the two-phase mixture to be separated cuts into the cyclone at a certain pressure from the periphery of the cyclone, a strong three-dimensional elliptical strong rotating shear turbulent motion is generated. Due to the difference in particle size between the coarse particles and the fine particles, they are subjected to centrifugal force, centripetal buoyancy, fluid drag, etc. Due to centrifugal sedimentation, most of the coarse particles are discharged through the bottom opening of the cyclone, and most of the fine particles are The overflow pipe is discharged to achieve the purpose of separation and classification.