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Iron pyrite inhibitor for use under low-alkalinity condition

An inhibitor and low alkalinity technology, applied in solid separation, flotation, etc., can solve the problems of inhibitor stability and inhibition effect, can not meet the needs of mineral processing production, etc., to achieve low cost, stable performance, The effect of small dosage

Inactive Publication Date: 2012-10-03
NORTHWEST RES INST OF MINING & METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing inhibitors have poor stability and inhibitory effect under low alkali conditions, and cannot well meet the needs of mineral processing production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Inhibitor of the present invention is prepared by the following method:

[0019] Weigh 45 kg of sodium thiosulfate, 45 kg of citric acid, and 10 kg of polyacrylamide at room temperature and pressure, and mix them uniformly by general methods at room temperature and pressure, then stir until they are fully dissolved, and there is no suspended solids and precipitates in the solution substance, prepared as an aqueous solution with a concentration of 1% by weight, is the inhibitor of the present invention. Then use the inhibitor aqueous solution to carry out the beneficiation test on the copper sulfide ore containing associated gold.

Embodiment 2

[0021] A copper sulfide mine contains associated gold, and its pyrite minerals are mainly pyrrhotite and pyrite. The ore copper grade is 0.91%, gold grade is 0.23%, and sulfur is 15.30%. The grinding fineness is -0.074mm70%. The beneficiation process is one roughing, two sweeping and two beneficiation. Receiver. The total amount of lime is 4000g / t (added in copper roughing and concentration 1 operations respectively), the pH of copper roughing slurry is 10.5, and the pH of copper concentration 1 slurry is 12. The mineral processing test results are as follows: the copper concentrate contains 21.47% copper, The gold content is 4.10g / t, the sulfur content is 33.76%, the copper recovery rate is 92.19%, and the gold recovery rate is 61.22%.

Embodiment 3

[0023] The inhibitor is selected, and its parts by weight are composed as follows: 50 kilograms of sodium thiosulfate, 40 kilograms of citric acid, and 10 kilograms of polyacrylamide, prepared according to the method in Example 1, and the aqueous solution with a weight percent concentration of 5% of the obtained inhibitor is used In a beneficiation test of a copper sulfide ore, the raw ore copper grade of the copper sulfide ore is 0.91%, the gold grade is 0.23%, and the sulfur is 15.30%. The additive amount of the inhibitor is 300 g / t (respectively added in copper roughing and concentration-1 operation, the same below) to replace the lime in Example 2, the pH of copper roughing and copper concentration-1 pulp is 8, and other conditions are the same as in the example 2. The beneficiation test results are as follows: copper concentrate contains 24.67% copper, 5.20g / t gold, 27.55% sulfur, 94.72% copper recovery and 79.08% gold recovery.

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PUM

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Abstract

The invention discloses an iron pyrite inhibitor for use under a low-alkalinity condition. The iron pyrite inhibitor consists of the following components in parts by weight: 40-50 parts of sodium thiosulfate, 40-50 parts of citric acid and 5-15 parts of polyacrylamide, wherein the polyacrylamide is hydroxyl-containing low molecular polyacrylamide of which the molecular content is 400-600. The inhibitor is prepared by using a method comprising the following steps of weighing sodium thiosulfate, citric acid and polyacrylamide; uniformly mixing to obtain 1-5 percent by weight of aqueous solution; and stirring. The iron pyrite inhibitor is used for selectively inhibiting iron sulfide minerals under a low-alkalinity condition, has good inhibition effects on minerals such as pyrite, magnetic pyrite and the like, has the advantages of stable performance, small using amount, low cost and environment friendliness, can be widely applied to sulfide ore dressing of copper, copper lead, copper zinc, lead zinc, copper lead zinc, gold and the like, and contributes to effectively increasing the scoring indexes of copper, lead, zinc, metal minerals and pyrite, effectively enhancing the flotation separation effect of multi-metal sulfide minerals and increasing the recovery rate of associated gold and silver.

Description

technical field [0001] The invention relates to a pyrite inhibitor, in particular to a pyrite inhibitor used under low alkalinity conditions. Background technique [0002] Pyrite (including pyrite, pyrrhotite, etc.) is the most widely distributed sulfide in the earth's crust, which can be formed under various geological conditions and often coexists with other minerals, such as copper, lead, and zinc sulfide Minerals etc. Pyrite is one of the main minerals that affect the separation of polymetallic sulfide ores and the grades of copper, lead, zinc, and gold concentrates. Whether pyrite can be effectively suppressed has become a key issue for the success of mineral processing technology. At present, the suppression of pyrite generally adopts the high-alkali process represented by lime, but the high-alkali process is not conducive to the separation of the target metal minerals and pyrite, the separation of polymetallic sulfide ores, and the comprehensive recovery of associate...

Claims

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Application Information

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IPC IPC(8): B03D1/018B03D101/06B03D103/02
Inventor 黄建芬周涛余江鸿师伟红张析李振宇
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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