Mineral separation method for recovering fluorite from flotation tailings of wolframite and scheelite

A technology for flotation tailings and black and white tungsten, applied in flotation, solid separation, etc., can solve the problems of production safety management safety hazards, poor water solubility of collector oleic acid, large amount of soda ash added, etc., and achieve the goal of eliminating residual chemicals Influence and eliminate hidden dangers of acid and alkali production management and improve recovery rate

Active Publication Date: 2018-10-19
BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, in the fluorite beneficiation industry, soda ash is usually used to adjust the pH value of the pulp, and water glass is used as an inhibitor and oleic acid or sodium oleate is used as a collector. Production safety management and worker operation have caused major safety hazards; in order to improve the grade of fluorite concentrate, the amount of water glass added is also large, which makes the fine tailings suspended and the tailings are difficult to settle. The storage capacity requirements are very high, resulting in great environmental pressure; at the same time, the collector oleic acid has disadvantages such as poor water solubility, poor dispersibility, easy stratification, and unstable performance.
Inhibitors such as water glass and acidified water glass are generally added to the fluorite beneficiation operation, which also causes disadvantages such as difficulty in sedimentation of tailings and acid corrosion.

Method used

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  • Mineral separation method for recovering fluorite from flotation tailings of wolframite and scheelite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The flotation tailings of a black and white tungsten mine contain CaF 2 20.37%, CaCO 3 3.51%, SiO 2 47.05%, the flotation process adopts the process of one roughing, one sweeping and seven refining, in which the middle ore from the first selection and sweeping returns to roughing, and the middle ore from the second, third, fourth, fifth, sixth and seventh selections are successively Return to the previous featured job.

[0051] Such as figure 1 Shown, follow the steps below to perform flotation:

[0052] (1) Add modified oleic acid collector to black and white tungsten ore flotation tailings, the addition amount is 400g / t, obtain foam product fluorite coarse concentrate and tailings after a rough separation, the modified oleic acid The collector is a combination of oleic acid, kerosene and octylphenyl polyoxyethylene ether according to the mass ratio of 7:2:1;

[0053] (2) Sweep the tailings obtained after the roughing in step (1), the amount of the modified ole...

Embodiment 2

[0057] The flotation tailings of a black and white tungsten mine contain CaF 2 25.81%, CaCO 3 5.69%, SiO 2 46.62%, the flotation process adopts one roughing, one sweeping and eight refining processes, in which the middle ore from the first selection and sweeping returns to roughing, and the second, third, fourth, fifth, sixth, seventh and eighth selections The middle mine returns to the previous selection operation in turn.

[0058] Follow the steps below for flotation:

[0059] (1) Add modified oleic acid collector to black and white tungsten ore flotation tailings, the addition amount is 600g / t, obtain foam product fluorite coarse concentrate and tailings after a rough separation, the modified oleic acid The collector is a combination of oleic acid, kerosene and octylphenyl polyoxyethylene ether according to the mass ratio of 8:2.5:1;

[0060] (2) Sweep the tailings obtained after the roughing in step (1), the addition of modified oleic acid collector is 80g / t in the ...

Embodiment 3

[0064] The flotation tailings of a black and white tungsten mine contain CaF 2 18.82%, CaCO 3 2.58%, SiO 2 49.72%, the flotation process adopts a process of roughing, sweeping and nine refining, in which the middle ore of the first selection and sweeping returns to roughing, and the second, third, fourth, fifth, sixth, seventh, eighth, and ninth times The middle ore obtained from the concentration returns to the previous concentration operation in turn.

[0065] Follow the steps below for flotation:

[0066] (1) Add modified oleic acid collector to black and white tungsten ore flotation tailings, the addition amount is 300g / t, obtain foam product fluorite coarse concentrate and tailings after a rough separation, the modified oleic acid The collector is a combination of oleic acid, kerosene and octylphenyl polyoxyethylene ether according to a mass ratio of 10:3:1;

[0067] (2) Sweep the tailings obtained after the roughing in step (1), the amount of modified oleic acid c...

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Abstract

The invention relates to a mineral separation method for recovering fluorite from the flotation tailings of wolframite and scheelite. The method comprises the following steps: a modified oleic collector is added into the flotation tailings of wolframite and scheelite, roughing is carried out and then the rough concentrates and tailings of fluorite are obtained, wherein the modified oleic collectoris the combination of oleic acid, kerosene and octylphenyl polyoxyethylene ether; a gangue inhibitor is added into the rough concentrates of fluorite and fine separation working is carried out, wherein the gangue inhibitor is the combination of aluminum sulfate, tannin extract and sodium hexametaphosphate. According to the mineral separation method disclosed by the invention, through improvementfor a flotation reagent, the disadvantages of high pressure, corrosion resistance and the like of a tailing pond, caused due to the difficult sedimentation of tailings, which are brought by the adoption of sodium silicate, acidified sodium silicate and other inhibitors in fluorite flotation in the prior art, are overcome, and safe, environment-friendly and efficient development and utilization forfluorite resources in the flotation tailings of wolframite and scheelite are realized; and meanwhile, the grade and recovery rate of fluorite concentrates are increased, the content of CaF2 in the fluorite concentrates is higher than 95%, the recovery rate is higher than 75%, and good economic benefits and application prospect are achieved.

Description

technical field [0001] The invention relates to the technical field of mineral processing, in particular to a beneficiation method for recovering fluorite from flotation tailings of black and white tungsten ore. Background technique [0002] Fluorspar, also known as fluorspar, fluorspar powder, or fluorspar powder, is an equiaxed mineral whose main component is calcium fluoride (CaF 2 ), is the main fluorine raw material. With the rapid development of my country's economy, the demand for fluorine is increasing day by day, and the high-grade single-type fluorite ore resources are gradually exhausted. Therefore, how to maximize the use of associated (symbiotic) fluorite ore, especially poly The fluorite resource in the metal tailings has become an urgent problem to be solved in the development of the fluorine industry today, and the flotation process is the most important beneficiation method for fluorite ore. [0003] There are many existing methods for utilizing flotation t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/008B03D1/018B03D101/02B03D101/06B03D103/02
CPCB03D1/008B03D1/018B03D2201/02B03D2201/06B03D2203/02
Inventor 凌石生王中明肖巧斌呼振峰刘方谭欣张云海刘书杰苏建芳赵杰
Owner BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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