Scheelite beneficiation method

A technology of scheelite beneficiation and scheelite, applied in chemical instruments and methods, flotation, magnetic separation, etc., can solve the problems of low recovery rate of scheelite, low grinding efficiency, over-grinding, etc., and achieve mature process principles and reduce Over-grinding situation, technological process to achieve easy results

Active Publication Date: 2013-02-06
ZHONGXIANG TUNGSTEN IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In view of the above-mentioned characteristics of scheelite, the current beneficiation methods of scheelite have low grinding efficiency, high energy consumption for grinding, over-grinding is easy to occur in the flotation process, and the recovery rate of scheelite is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Coarse grinding of raw ore without desliming. After passing through a 200-250μm vibrating screen, the sieve is returned to the coarse grinding, and the ore under the sieve is subjected to strong magnetic separation and tailing, mainly to throw away magnetic garnet and other magnetic minerals. After grinding, it enters scheelite normal temperature flotation. The concentrate obtained by rough selection is subjected to a scheelite heating and selection to obtain scheelite concentrate; the tailing magnetic separation concentrate is also subjected to normal temperature flotation. The medium ore is merged into non-magnetic scheelite for fine grinding;

[0022] Strong magnetic separation and tailings: After the low-grade scheelite raw ore is coarsely ground and screened by a 200-250μm vibrating screen, the sieve returns to coarse grinding, and the material under the sieve is subjected to a magnetic induction intensity of 5000Gs to obtain magnetic separation tailings and magneti...

Embodiment 2

[0027] Coarse grinding of raw ore without desliming. After passing through a 200-250μm vibrating screen, the sieve is returned to the coarse grinding, and the ore under the sieve is subjected to strong magnetic separation and tailing, mainly to throw away magnetic garnet and other magnetic minerals. After grinding, it enters scheelite normal temperature flotation. The concentrate obtained by rough selection is subjected to a scheelite heating and selection to obtain scheelite concentrate; the tailing magnetic separation concentrate is also subjected to normal temperature flotation. The medium ore is merged into non-magnetic scheelite for fine grinding;

[0028] Strong magnetic separation and tailings: After the low-grade scheelite raw ore is coarsely ground and screened by a 200-250μm vibrating screen, the sieve returns to the coarse grinding, and the material under the sieve gets magnetic separation tailings and magnetic separation concentrate under the magnetic induction inte...

Embodiment 3

[0033] Coarse grinding of raw ore without desliming. After passing through a 200-250μm vibrating screen, the sieve is returned to the coarse grinding, and the ore under the sieve is subjected to strong magnetic separation and tailing, mainly to throw away magnetic garnet and other magnetic minerals. After grinding, it enters scheelite normal temperature flotation. The concentrate obtained by rough selection is subjected to a scheelite heating and selection to obtain scheelite concentrate; the tailing magnetic separation concentrate is also subjected to normal temperature flotation. The medium ore is merged into non-magnetic scheelite for fine grinding;

[0034] Strong magnetic separation and tailing: After the low-grade scheelite raw ore is coarsely ground and sieved by a 200-250μm vibrating sieve, the sieve returns to coarse grinding, and the material under the sieve is subjected to magnetic induction of 7000Gs to obtain magnetic separation tailings and magnetic separation con...

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Abstract

The invention discloses a scheelite beneficiation method. The scheelite beneficiation method comprises the steps of: roughly grinding raw mineral with no need of desliming; screening the raw mineral in a sieve with 200-250mu m, roughly grinding the material on the sieve again, carrying out strong magnetic separation and discarding on the mineral under the sieve, wherein mainly magnetic garnets and other magenetic minerals are mainly discarded; carrying out scheelite normal temperature flotation on the nonmagnetic mineral after the nonmagnetic mineral is finely ground; carrying out scheelite warming flotation on concentrate obtained after the rough flotation to obtain scheelite concentrate; and carrying out normal temperature floatation on discarded magnetic concentrate, adding flotation middlings into the nonmagnetic scheelite concentrate to be finely ground. The scheelite beneficiation method aims at the mineral characteristics of the scheelite, the raw mineral contains a large amount of weak magnetism calcium and iron garnet gangue, so the recovery rate can be influenced due to the argillization caused by excessive grinding. The scheelite beneficiation method utilizes a ferromagnetic beneficiation method to effectively separate the magnetic ores, so that the excessive grinding condition is lowered, and the scheelite is preliminarily separated and beneficiated. The scheelite beneficiation method can enhance the mineral grinding efficiency, reduces the mineral grinding energy consumption, enhance the selection grade of the scheelite, reduces the beneficiation amount of the flotation, lowers the dosage of flotation reagents, and enhances the total recovery rate of the scheelite. The scheelite beneficiation method is especially suitable for medium grade and low grade scheelite beneficiation.

Description

technical field [0001] The invention belongs to a mineral processing method for heavy metals, in particular to a scheelite mineral processing method. Background technique [0002] my country is a big tungsten-producing country with the largest reserves of tungsten resources in the world, and its output and export volume both rank first in the world. Tungsten resources mainly exist in the form of wolframite and scheelite. With the decreasing amount of wolframite resources, mining scheelite resources has become the main mineral variety for tungsten resource mining. Due to historical reasons and technical limitations, the utilization rate of scheelite resources is less than 50%, and a large amount of scheelite was lost in tailings in the past. With the advancement of high-efficiency smelting and processing technology, more attention has been paid to the mining of scheelite mines. Generally, compared with conventional non-ferrous metal ore varieties, the grade of tungsten ore r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03C1/30B03B1/04B03D1/00
Inventor 王战斌李义兵王小军邓波
Owner ZHONGXIANG TUNGSTEN IND
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