A method for efficiently separating black tungsten concentrate and scheelite concentrate from tungsten ore

A technology of black and white tungsten and concentrate, applied in the field of comprehensive utilization of tungsten ore resources, can solve the problems of low flotation recovery rate of wolframite, low separation efficiency of black and white tungsten, inconsistent pH range, etc., and achieve high quality scheelite concentrate, Efficient flotation separation and easy operation

Active Publication Date: 2018-07-27
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

General oxide ore collectors have weak collection ability for wolframite, but strong collection for scheelite, which leads to low flotation recovery rate of wolframite and serious loss of metal content
(2) The commonly used collectors have weak adaptability to the pH of the pulp, and the optimal flotation pH ranges of wolframite and scheelite are inconsistent
(3) Wolframite is brittle and relatively easy to overgrind than scheelite
However, in the strong magnetic separation process, the separation efficiency of black and white tungsten is relatively low. A large amount of scheelite is entrained in black tungsten, and a large amount of black tungsten is entrained in scheelite. Tungsten loss is serious

Method used

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  • A method for efficiently separating black tungsten concentrate and scheelite concentrate from tungsten ore
  • A method for efficiently separating black tungsten concentrate and scheelite concentrate from tungsten ore
  • A method for efficiently separating black tungsten concentrate and scheelite concentrate from tungsten ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Mix 1mol / L benzoic acid with 3mol / L anhydrous methanol, slowly add 30mL of concentrated acid, add a few grains of zeolite, heat to 75°C and reflux for 2h. Distill off excess methanol with a distillation device, and the residue is washed three times to obtain the corresponding ester; add 2.2 mol of hydroxylamine hydrochloride into a single-necked flask, and add 50 mL of ethanol, stir and cool in a water bath, add 88 g of sodium hydroxide therein, Stir in a water bath for 2 hours, filter out insoluble free hydroxylamine to obtain free hydroxylamine hydrochloride; add free hydroxylamine hydrochloride and 25mL methanol to a three-necked flask equipped with an electric stirrer and a dropping funnel, and stir dropwise at 45°C Add 1.7 mol of the obtained ester, react for 45 minutes after the dropwise addition, add 0.5 mol of lead nitrate to the solution obtained in the third step under stirring conditions, and keep the reaction at 40°C for 2 hours to obtain the complex collecto...

Embodiment 2

[0068] Mix 1mol / L salicylic acid with 3mol / L anhydrous methanol, slowly add 30mL of concentrated acid, add a few grains of zeolite, heat to 80°C and reflux for 1h. Distill off excess methanol with a distillation device, and the residual liquid is washed 5 times to obtain the corresponding ester; add 2.2 mol of hydroxylamine hydrochloride into a single-necked flask, and add 50 mL of ethanol, stir and cool in a water bath, add 88 g of sodium hydroxide to it, Stir in a water bath for 1.5h, filter out insoluble free hydroxylamine to obtain free hydroxylamine hydrochloride; add free hydroxylamine hydrochloride and 25mL methanol to a three-neck flask equipped with an electric stirrer and a dropping funnel, and stir at 48°C Add 1.7 mol of the obtained ester dropwise, react for 45 minutes after the dropwise addition, add 0.25 mol of aluminum sulfate to the solution obtained in the third step under stirring conditions, and keep the reaction at 40° C. for 2 hours to obtain the complex co...

Embodiment 3

[0073] Utilize this process to process Yaogangxian tungsten-tin-molybdenum-bismuth polymetallic ore, adjust the pH of the desulfurization tailings to 7.8 by sodium carbonate, add metal ion ligand collector (prepared in Example 1) 500g / t, inflate the slurry and stir 5min, after a rough and a fine double sweep flotation operation to obtain WO 3 53% black and white tungsten mixed concentrate, after the mixed concentrate passes through the thickener, put it into the mixing tank, the mass concentration of the pulp is 72%, add sodium oleate, sodium sulfide, caustic soda, water glass 2Kg / t, 8Kg / t, 1Kg / t, 80Kg / t, stirring speed 800r / min, high-speed stirring 1, flotation separation after slurry mixing is completed, foam product is added with 8Kg / t nitric acid with a mass fraction of 10% for dephosphorization treatment to obtain WO 3 73% scheelite concentrate, adding 3Kg / t of sulfuric acid to the flotation tailings, settling, filtering and drying, it is WO 3 36% wolframite concentrate....

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Abstract

The invention discloses a method for efficiently separating wolframite concentrate and scheelite concentrate from tungsten ore. According to the method, wolframite and scheelite mixed concentrate pulp is obtained through floatation enrichment of tungsten ore; and fatty acid, sodium sulfide, caustic soda and sodium silicate are sequentially added into the wolframite and scheelite mixed concentrate pulp, strong stirring and pulp mixing are performed, flotation separation is performed, the scheelite concentrate is obtained from flotation foam, and flotation tailings are the wolframite concentrate. By means of the method, wolframite and scheelite can be thoroughly separated, the quality of the scheelite concentrate is high, and the problems that products contain both wolframite and scheelite, and the quality of the scheelite concentrate is poor are solved; and the technological process is short, chemical agents are simple, operation is convenient, labor intensity is low, energy consumption is low, environmental protection and high efficiency are achieved, and not only is the beneficiation cost greatly reduced, but also the tungsten resource utilizing rate is remarkably increased.

Description

technical field [0001] The invention relates to a method for efficiently separating black tungsten concentrate and scheelite concentrate from tungsten ore, belonging to the field of comprehensive utilization of tungsten ore resources. Background technique [0002] Tungsten is a precious rare metal, which has the highest melting point, the lowest thermal expansion coefficient, and the lowest vapor pressure among metal elements, and is one of the highest density metal elements. Tungsten has excellent high-temperature mechanical properties, very high compression modulus and With a series of unique properties such as elastic modulus, excellent high temperature creep resistance, high electrical and thermal conductivity, and very high electron emission coefficient, it is widely used in various fields such as civil, industrial, and military industries. For a long time, the mineral resources developed by my country's tungsten industry are mainly wolframite. According to the reserve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/018B03D1/02B03D101/02B03D101/04B03D101/06B03D103/02
CPCB03D1/018B03D1/02B03D2201/005B03D2201/007B03D2201/02B03D2201/04B03D2201/06B03D2203/025
Inventor 孙伟胡岳华韩海生李晓东伏彩萍刘润清黄伟生谢加文陈玉林唐鸿鹄刘杰孟祥松郭衍哲
Owner CENT SOUTH UNIV
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