External magnetic separator for fine-fraction refractory ore separation

Abstract

The invention discloses an external magnetic separator for fine-fraction refractory ore separation. The magnetic separator comprises a transmission device, a magnetic system, a magnetic separation cylinder, a concentrate tank and a flushing pipe. The magnetic system is in a long-strip arc shape, and the magnetic separation cylinder is mounted on the inner side of the long-strip arc-shaped magneticsystem in a manner of rotating relative to the magnetic system. The transmission device drives the magnetic separation cylinder to rotate. At least one spiral plate spirally extending along the axialdirection of the cylinder is arranged on the inner wall of the magnetic separation cylinder. One end of the magnetic separation cylinder is a feeding port, and the other end of the magnetic separation cylinder is a tailing port. A long-strip concentrate tank and the flushing pipe are installed in the magnetic separation cylinder corresponding to the external magnetic system, the flushing pipe islocated above the concentrate tank, a water outlet of the flushing pipe faces the inner wall of the magnetic separation cylinder, and the water outlet direction is reflected by the inner wall of the magnetic separation cylinder to fall into the concentrate tank. The magnetic separator is beneficial to separation of iron tailing extremely-fine particle magnetic minerals.

Description

technical field [0001] The invention relates to an external magnetic type magnetic separator used for the separation of fine-grained refractory ore, which is suitable for the iron tailings magnetization roasting magnetic separation process. Background technique [0002] In the prior art, the magnetic separator mostly adopts a semi-countercurrent structure, which is mainly composed of a transmission device, a magnetic system 10, a magnetic separation cylinder 20, a tank body 30 and a flushing pipe 40, such as figure 1 shown. When working, after the pulp flows into the tank body 30, under the action of the magnetic field generated by the magnetic system 10, the magnetic ore particles undergo magnetic aggregation to form a "magnetic group". Adsorbed on the magnetic separation cylinder 20. The magnetic separation cylinder 20 is driven to rotate by the transmission device. Since the polarities of the magnetic system 10 are arranged alternately along the rotation direction of t...

AI Technical Summary

Problems solved by technology

[0005] 2. The magnetic system 10 is installed in the magnetic separation cylinder 20, and the magnetic aggregation occurs outside the magnetic separation cylinder 20, and the magnetic aggregation is weak, which is not conducive to the capture of fine particles;

[0006] 3. The magnetic field of the magnetic system 10 always maintains sufficient strength, and the tailings (especially very fine particles) are likely to be wrapped in magnetic minerals and brought into the concentrate, which is not conducive to separation;

[0007] 4. The magnetic field of the magnetic system 10 always maintains a consistent strength. If the strength is too large, it will cause waste. If the strength is not enough, it is not conducive to sorting

Images