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Method for separating black and white tungsten bulk flotation rough concentrates

A technology of mixed flotation and separation methods, applied in solid separation, wet separation, chemical instruments and methods, etc., can solve the problem of wolframite selection recovery rate, low grade of wolframite concentrate, difficulty and instability of wolframite recovery and other problems, to achieve the effect of high recovery rate, easy activation and easy recovery

Active Publication Date: 2011-10-12
INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the addition of a large amount of water glass, caustic soda and sodium sulfide in the heating and stirring flotation scheelite concentration process, wolframite is strongly suppressed, which brings great difficulties to the recovery of wolframite
Wolframite is strongly inhibited and difficult to activate, therefore, wolframite concentration recovery rate and wolframite concentrate grade are low and unstable

Method used

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  • Method for separating black and white tungsten bulk flotation rough concentrates
  • Method for separating black and white tungsten bulk flotation rough concentrates
  • Method for separating black and white tungsten bulk flotation rough concentrates

Examples

Experimental program
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Effect test

Embodiment 1

[0013] with WO 3 12.67%, Sn 0.2-0.5%, black and white tungsten ratio 1:9 black and white tungsten mixed flotation machine concentrate. Use a high gradient magnetic separator with a background magnetic field of 0.5 Tesla to separate wolframite from scheelite. After a rough separation, the output contains WO 3 10.65% wolframite coarse concentrate and containing WO 3 13.02% scheelite coarse concentrate. Black tungsten coarse concentrate is thickened to a weight concentration of 35%. Add sodium fluorosilicate, water glass, aluminum sulfate, lead nitrate, benzohydroxamic acid and sulfated oleic acid soap according to Table 1. After one roughing and three times of sweeping And four selections, the output contains WO 3 42.18% black tungsten concentrate and black tungsten concentrated tailings; thick scheelite coarse concentrate to a weight concentration of 65%, add sulfated fatty acid soap, sodium sulfide, caustic soda and water glass according to Table 2, and heat to 90-95 ℃, he...

Embodiment 2

[0015] with WO 3 24.43%, Sn 0.2-0.5%, black and white tungsten ratio 3.5:6.5 black and white tungsten mixed flotation rough concentrate. Use a high gradient magnetic separator with a background magnetic field of 0.8 Tesla to separate wolframite from scheelite. After a rough separation, the output contains WO 3 26.82% wolframite coarse concentrate and containing WO 3 23.42% scheelite coarse concentrate. Black tungsten coarse concentrate is dense to 35% in weight concentration, adding chemicals according to Table 1, after one roughing, three times of sweeping and four times of beneficiation, the output contains WO 3 65.87% black tungsten concentrate and black tungsten concentrated tailings; thick scheelite coarse concentrate to a weight concentration of 65%, add sulfated fatty acid soap, sodium sulfide, caustic soda and water glass according to Table 2, and heat to 90-95 ℃, heat preservation and stirring for 1 hour, after one roughing, three times of sweeping and three times ...

Embodiment 3

[0017] with WO 3 11.46%, Sn 0.2-0.5%, black and white tungsten ratio 5.3:4.7 black and white tungsten mixed flotation rough concentrate. Use a high gradient magnetic separator with a background magnetic field of 1 Tesla to separate wolframite from scheelite. After a rough separation, the output contains WO 3 15.08% wolframite coarse concentrate and containing WO 3 8.89% scheelite coarse concentrate. Black tungsten coarse concentrate is dense to 35% in weight concentration, adding chemicals according to Table 1, after one roughing, three times of sweeping and four times of beneficiation, the output contains WO 3 64.40% black tungsten concentrate and black tungsten concentrated tailings; thick scheelite coarse concentrate to a weight concentration of 65%, add sulfated fatty acid soap, sodium sulfide, caustic soda and water glass according to Table 2, and heat to 90-95 ℃, heat preservation and stirring for 1 hour, roughing once, sweeping three times and refining three times, t...

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Abstract

The invention relates to a method for separating black and white tungsten bulk flotation rough concentrates. The method is characterized in that a black tungsten rough concentrate and a white tungsten rough concentrate are obtained by virtue of high-gradient magnetic separation, roughing or roughing and scavenging; black tungsten concentrates and black tungsten cleaner tailings are obtained via carrying out once roughing, three-time scavenging and four-time concentrating on the black tungsten rough concentrate by utilizing sodium fluosilicate, sodium silicate, aluminum sulfate, lead nitrate, benzohydroxamic acid and sulfated nascent soap; white tungsten concentrates and white tungsten cleaner tailings are obtained via carrying out once roughing, three-time scavenging and three-time concentrating on the white tungsten rough concentrate after the white tungsten rough concentrate is heated up and stirred by utilizing sulfated fatty acid soap, sodium silicate, caustic soda and sodium sulfide; cassiterites in the white tungsten cleaner tailings are recovered by a table concentrator. The method related by the invention has the advantages of small mutual interference of black tungsten ore and white tungsten ore in the black and white tungsten bulk flotation rough concentrates, high recovery ratio of black tungsten ore and high and stable quality of the black tungsten ore; and the method is suitable for the black and white tungsten bulk flotation rough concentrates containing 5-40% of WO3.

Description

technical field [0001] The invention relates to a method for separating tungsten ore, in particular to a method for separating black and white tungsten mixed flotation rough concentrate. Background technique [0002] At present, the method of flotation recovery of scheelite and wolframite from complex polymetallic ores such as sulfide ore, scheelite, wolframite, cassiterite, garnet, fluorite or calcite is more successful. GY method (China Patent 200410051961.1), CF method (Chinese patent 95117062.7) and persimmon and bamboo garden method (combination of GY method and CF method). Their common feature is to use chelating collector benzylhydroxamic acid or nitrosophenylamine salt to mix and float black and white tungsten in neutral pulp to obtain WO-containing tungsten. 3 It is 5-40% black and white tungsten mixed flotation rough concentrate, the rough concentrate contains 0.2-0.5% Sn, and the recovery rate of tungsten is 75-80%. These methods have made great progress in bene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03B9/06
CPCY02W30/60
Inventor 邱显扬汤玉和张先华林日孝石志中
Owner INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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