Gradient magnetic weight centrifugal screening chute, equipment and method for magnetic minerals

Abstract

The invention belongs to the technical field of magnetic mineral separation. The gradient magnetic weight centrifugal screening chute, equipment and method for magnetic minerals comprises a screeningmagnetic system and a spiral chute, wherein the screening magnetic system comprises multiple groups of magnetic units which are in homo-polar arrangement along a cylindrical surface; the spiral chuteis coaxially arranged on the outer side of the screening magnetic system and is positioned in the radial direction of the spiral chute; the magnetic field intensity, which acts on the spiral chute, ofthe screening magnetic system is dispersed and weakened from inside to outside to form a radial magnetic field gradient; the intersecting line of the chute surface of the spiral chute and the coaxialcylindrical surface alpha is a spatial spiral line beta; in the spatial spiral line beta, the intensity of the magnetic field of each point on at least one lead is the same. According to the invention, the screening efficiency of the magnetic minerals is higher, in addition, the screening quality of the magnetic minerals is effectively guaranteed, non-magnetic minerals with a high particle size can be prevented from being mixed in the magnetic minerals, the loss of fine-grained magnetic minerals can be avoided, and therefore, screening quality and yield can be improved.

Description

technical field [0001] The invention belongs to the technical field of magnetic mineral separation, and in particular relates to a gradient magnetic gravity centrifugal screening chute, equipment and method for magnetic minerals. Background technique [0002] During the flow of ore slurry along the surface of the spiral chute of conventional gravity separation equipment, under the action of centrifugal force and gravity, heavy minerals move along the inner side of the chute surface, and light minerals move along the outer side of the chute surface. However, for magnetic mineral separation, coarse particles are low When the high-grade joint minerals slide down the trough surface, due to their coarse particle size, they are more affected by gravity than centrifugal force, so they are easier to move along the inner side of the trough surface, and finally mix with magnetic minerals into the concentrate product to reduce Concentrate grade index; and for fine-grained magnetic mine...

AI Technical Summary

Problems solved by technology

[0002] During the flow of ore slurry along the surface of the spiral chute of conventional gravity separation equipment, under the action of centrifugal force and gravity, heavy minerals move along the inner side of the chute surface, and light minerals move along the outer side of the chute surface. However, for magnetic mineral separation, coarse particles are low When the high-grade joint minerals slide down the trough surface, due to their coarse particle size, they are more affected by gravity than centrifugal force, so they are easier to move along the inner side of the trough surface, and finally mix with magnetic minerals into the concentrate product to reduce Concentrate grade index; and for fine-grained magnetic minerals, because of their finer particle size, they are easier to move along the outside of the tank surface, and finally mix with the fine-grained mud outside the tank surface into the tailings products, resulting in magnetic Mineral loss, reducing the recovery rate of magnetic minerals in concentrate products

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