Beneficiation method of low-grade tungsten ore

A beneficiation method and low-grade technology, applied in the direction of chemical instruments and methods, wet separation, solid separation, etc., can solve problems such as difficult to achieve large-scale, long process, difficult production operation, etc. The effect of taste and efficient use

Inactive Publication Date: 2020-10-30
ZIJIN MINING GROUP
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the beneficiation of all grades of tungsten ore in the industry mainly adopts normal temperature flotation or heating flotation. The recovery rate of low-grade tungsten ore is about 60% by normal temperature flotation, and about 70% by heating flotation. , with these two methods of flotation of low-grade tungsten ore, there are the following problems: one is to obtain W in the tungsten concentrate 2 o 3 The grade is only about 30% to 40%, which cannot be qualified; second, the cost of sorting is high, so that low-grade tungsten ore resources cannot be recycled
[0004] The black and white tungsten ore with a particle size below 0.04mm is desulfurized by flotation first, and the floating sulfur tailings are flotation + centrifugal concentrator gravity separation to obtain fine slime tungsten concentrate. , the production operation is difficult to control, and the processing capacity is limited; of course, some people have made breakthroughs in the recycling of relatively close low-grad

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  • Beneficiation method of low-grade tungsten ore

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Experimental program
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Embodiment 1

[0033] The raw ore is coarsely crushed to below -80mm, screened by a double-layer original vibrating sieve, and the +60mm particle size is crushed by a medium and fine crushing cone, and then returned to the original vibrating sieve for screening, -12mm particle size enters the grinding, and the 12-60mm particle size enters the photoelectric select. The 12-60mm particle size enters the photoelectric separation for pre-throwing tailings, and the photoelectric separation machine can get the disposable tailings 1 with a yield of 27.265%, W 2 o 3 Grade 0.02%, Concentrate 1 Medium W 2 o 3 The content is increased to 0.403%; the concentrate 1 is crushed to a particle size below -12mm through the fine crushing-screening closed-circuit process; the particle size below -12mm obtained by coarse crushing-screening and the particle size below -12mm obtained by photoelectric separation concentrate 1 After the two parts of ore are combined, they are fed into the ball mill. The ore and wa...

Embodiment 2

[0035] The raw ore is coarsely crushed to below -80mm, screened by a double-layer original vibrating sieve, and the +60mm particle size is crushed by a medium and fine crushing cone, and then returned to the original vibrating sieve for screening, -12mm particle size enters the grinding, and the 12-60mm particle size enters the photoelectric select. The 12-60mm particle size enters the photoelectric separation for pre-throwing tailings, and the photoelectric separation machine obtains the discardable tailings 1. The yield rate is 27.678%, W 2 o 3 Grade 0.023%, Concentrate 1 Medium W 2 o 3The content is increased to 0.4%; the concentrate 1 is crushed to a particle size below -12mm through the fine crushing-screening closed-circuit process; the particle size below -12mm obtained by coarse crushing-screening and the particle size below -12mm obtained by photoelectric separation concentrate 1 After the two parts of ore are combined, they are fed into the ball mill, and the ore ...

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Abstract

The invention relates to a beneficiation method of low-grade tungsten ore. A combined technology including crushing and screening, photoelectric sorting, fine screening, ore grinding and dual-temperature flotation is utilized. Qualified tungsten concentrate is obtained through three-stage tailings throwing, low-grade tungsten ore resources are utilized, tungsten can be efficiently recycled, the recovery rate of the tungsten ore W2O3 reaches 85% or above, the grading cost can also be reduced, and the comprehensive utilization rate of the resources is improved. The method has the advantages of being simple and feasible, high in operability and environmentally friendly and having important reference significance for utilization of other mineral low-grade ore, and is suitable for the mining and metallurgy industry to use.

Description

technical field [0001] The invention relates to a beneficiation method of low-grade tungsten ore, which is suitable for application in the mining and metallurgy industry. Background technique [0002] The mining and metallurgy industry puts tungsten ore in W 2 o 3 Content ≤0.2% is defined as low-grade tungsten ore, that is, tungsten ore without industrial mining value. At present, the beneficiation of all grades of tungsten ore in the industry mainly adopts two processes of normal temperature flotation or heating flotation. The recovery rate of low-grade tungsten ore is about 60% when using normal temperature flotation technology, and the recovery rate is about 70% when using heating flotation technology. , with these two methods of flotation of low-grade tungsten ore, there are the following problems: one is to obtain W in the tungsten concentrate 2 o 3 The grade is only about 30% to 40%, which cannot be qualified; second, the cost of sorting is high, so that low-grade ...

Claims

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Application Information

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IPC IPC(8): B03B7/00
CPCB03B7/00
Inventor 闫军宁张建强李长亮赵德志刘显华巫銮东赖伟强李广
Owner ZIJIN MINING GROUP
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