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Ore dressing method for separation and recovery of scheelite and fluorite from sulfur flotation tailings of polymetallic ore

A technology for separation and recovery of polymetallic ores, applied in the field of beneficiation, can solve the problems of difficulty in increasing the total recovery rate of fluorite, affecting the recovery rate of fluorite, and fluorite easily falling out of the tank, so as to solve the problem of heating and beneficiation, reduce acid The effect of reducing the consumption and drug consumption and improving the recovery rate

Inactive Publication Date: 2012-06-13
SOUTH CHINA NORMAL UNIVERSITY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the adsorption of inhibitors on the surface, during the fluorite flotation process of floating tungsten tailings, fluorite is easy to fall off the tank, especially in multiple beneficiation operations under low concentration conditions, which greatly affects Increased recovery rate of fluorspar
[0010] (3) Fatty acid is used as a collector in the priority flotation of scheelite, and the obtained scheelite coarse concentrate contains CaF 2 20-65%, taking away about 15-30% of the fluorite recovery rate, this part of fluorite will eventually be lost in the process of heating and refining scheelite, making it difficult to increase the total recovery rate of fluorite

Method used

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  • Ore dressing method for separation and recovery of scheelite and fluorite from sulfur flotation tailings of polymetallic ore
  • Ore dressing method for separation and recovery of scheelite and fluorite from sulfur flotation tailings of polymetallic ore
  • Ore dressing method for separation and recovery of scheelite and fluorite from sulfur flotation tailings of polymetallic ore

Examples

Experimental program
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Effect test

Embodiment 1

[0045] In this embodiment, the above-mentioned floating sulfur tailings are used as ore feed, and the mineral processing method for separating and recovering scheelite and fluorite is as follows: Figure 4 As shown, the steps are as follows:

[0046] (1) Mixed flotation of scheelite and fluorite with floating sulfur tailings (rough selection section)

[0047] The ore feeding particle size is -200 mesh 82%, adding water glass as a gangue inhibitor, and the collector is oleic acid fat in parts by weight: sodium carbonate=1: 0.2 modified fatty acid, under the condition of pH 9, through a rough Two rough one scan one fine process (see Figure 5 ), the total time is 14 minutes, and the foam product obtained is the mixed rough concentrate of scheelite and fluorite;

[0048] (2) Fluorite flotation of mixed coarse concentrate of scheelite and fluorite (concentrated section)

[0049] With water glass in parts by weight: sulfuric acid: sodium hexametaphosphate: oxalic acid=1: 0.3: 0....

Embodiment 2

[0055] This embodiment differs from Embodiment 1 in that:

[0056] 1, step (1), the ore feeding granularity is-200 order 85%, and collector is the modified fatty acid of oleic acid fat in parts by weight: sodium carbonate=1: 0.1; Total time is 20 minutes.

[0057] 2, step (2), with water glass by weight: sulfuric acid: sodium hexametaphosphate: oxalic acid=1: 0.1: 0.2: 0.25 composite acidic water glass as scheelite inhibitor; Total time is 25 minutes.

[0058] 3. In step (3-1), the grinding particle size of the fluorite coarse concentrate regrinding is -400 mesh 85%; the total time is 15 minutes.

[0059] 4. In step (4), the ore feeding concentration of the shaking table is 30%.

Embodiment 3

[0061] This embodiment differs from Embodiment 1 in that:

[0062] 1, step (1), feed particle size is-200 order 90%, collector is by weight oleic acid fat: the modified fatty acid of sodium carbonate=1: 0.3; Flotation under the condition of pH 8.5, total time for 10 minutes.

[0063] 2, step (2), with water glass by weight: sulfuric acid: sodium hexametaphosphate: oxalic acid=1: 0.5: 0.25: 0.1 composite acidic water glass as scheelite inhibitor; Total time is 15 minutes.

[0064] 3. In step (3-1), the grinding particle size of the fluorite coarse concentrate regrinding is -400 mesh 75%; the total time is 5 minutes.

[0065] 4. In step (4), the ore feeding concentration of the shaking table is 35%.

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Abstract

The invention discloses an ore dressing method for separation and recovery of scheelite and fluorite from sulfur flotation tailings of polymetallic ore. The ore dressing method can eliminate the shortcomings caused by a preferential flotation process in the prior art by simultaneously performing bulk flotation on the scheelite and the fluorite and further separating the scheelite from the fluorite, further significantly improve the recovery rate of the scheelite and the fluorite and realize high-efficient recovery of two minerals, namely the scheelite and the fluorite in the polymetallic ore.Furthermore, the scheelite and the fluorite are dressed through a rough concentration bulk flotation and fine concentration separation two-stage process, so that indexes in various stages of operations are convenient to stipulate and control, and quantification of the indexes of the ore dressing process of the scheelite and the fluorite and operation management can be effectively realized.

Description

technical field [0001] The invention relates to the technical field of mineral processing, in particular to a mineral processing method for scheelite and fluorite in polymetallic ores. Background technique [0002] At present, in the prior art, for relatively simple scheelite or fluorspar, the beneficiation process is relatively mature, and the flotation method is usually used, and the process is simple and effective. For polymetallic ores containing sulfide ores such as molybdenite, bismuthite, pyrite, and minerals such as scheelite and fluorite, the recovery of scheelite and fluorite in the prior art usually adopts the method of preferential flotation. The method is to first float scheelite, and then carry out flotation of fluorite on the floating tungsten tailings. In the priority flotation process, the existing technology is to use the high alkali method to achieve the purpose of suppressing fluorite flotation scheelite, that is, by adding Na 2 CO 3 , CaO, NaOH, Na 2...

Claims

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Application Information

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IPC IPC(8): B03B9/06
CPCY02W30/60
Inventor 叶志平杨文李晓东韦权锋李焕文林颖吕清纯
Owner SOUTH CHINA NORMAL UNIVERSITY
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