Differential flotation method for copper lead sulfide minerals

A technology for preferential flotation and sulfide ore, applied in flotation, solid separation, etc., can solve the problems of copper-lead mixed concentrate drug removal difficulties, dichromate environmental pollution, copper-lead separation difficulty, etc., and achieve low cost , The preparation method is simple, and the effect of adding safety

Active Publication Date: 2019-11-19
ZIJIN MINING GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The task of the present invention is to overcome the deficiencies of the existing technology and provide a preferential flotation method for copper-lead sulfide minerals, which can not only effectively solve the environmental pollution problem of dichromate, but also solve the problem of copper-lead mixing in the existing separation process. Difficulty in removing drugs from concentrate, difficulty in separating copper and lead, high cost, and poor quality of concentrate

Method used

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  • Differential flotation method for copper lead sulfide minerals
  • Differential flotation method for copper lead sulfide minerals

Examples

Experimental program
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Effect test

Embodiment 1

[0037] The amount of pyrite slag (containing 1% copper) is 20t / h. Use the returned leaching solution to adjust the slurry, add a certain amount of sulfuric acid (the waste acid produced by flue gas washing can be used) and water, and control the concentration of the slurry to 40 %, control sulfuric acid concentration 40g / L, leaching at about 80°C for 4h, copper leaching rate is 60%. The amount of leachate is about 30m 3 / h, the concentration of sulfuric acid is about 32g / L. 13m out of the way 3 / h leachate, use washing liquid and raffinate to dilute to sulfuric acid concentration 8g / L, then remove suspended matter, enter copper extraction-electrowinning process. The remaining leachate is returned as pyrite slag slurry. The extraction agent consumption is 2.81kg / t-Cu.

Embodiment 2

[0039] The amount of pyrite slag (containing 1% copper) is 20t / h. Use the returned leaching solution to adjust the slurry, add a certain amount of sulfuric acid (the waste acid produced by flue gas washing can be used) and water, and control the concentration of the slurry to 40 %, control sulfuric acid concentration 50g / L, leaching at about 80°C for 4h, copper leaching rate is 65%. The amount of leachate is about 30m 3 / h, the concentration of sulfuric acid is about 40g / L. 8m out of the way 3 / h leachate, use washing liquid and raffinate to dilute to sulfuric acid concentration 8g / L, then remove suspended matter, enter copper extraction-electrowinning process. The remaining leachate is returned as pyrite slag slurry. The extraction agent consumption is 2.89kg / t-Cu.

Embodiment 3

[0041] The amount of pyrite slag (containing 1% copper) is 20t / h. Use the returned leaching solution to adjust the slurry, add a certain amount of sulfuric acid (the waste acid produced by flue gas washing can be used) and water, and control the concentration of the slurry to 40 %, control sulfuric acid concentration 60g / L, leaching at about 80°C for 4h, copper leaching rate is 68%. The amount of leachate is about 30m 3 / h, the concentration of sulfuric acid is about 48g / L. 6m out of the way 3 / h leaching liquid, use washing liquid and raffinate to dilute to sulfuric acid concentration 7.20g / L, then remove suspended matter, enter copper extraction-electrowinning process. The remaining leachate is returned as pyrite slag slurry. The extraction agent consumption is 3.05kg / t-Cu.

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Abstract

The invention relates to a differential flotation method for copper lead sulfide minerals. The differential flotation method comprises the following conventional procedures: grinding raw ore; carryingout roughing on copper, and then separating the copper having undergone roughing into two copper paths; subjecting copper in one of the copper paths to secondary copper concentration so as to obtaina copper concentrate, and other in the other of the copper paths to secondary copper scavenging and secondary lead roughing; further dividing a material obtained after secondary copper scavenging andsecondary lead roughing into two branches; and subjecting one branch of the material to lead concentration so as to obtain a lead concentrate and subjecting the other branch of the material to secondary lead scavenging so as to obtain tailings. The differential flotation method is characterized by further comprising a step of preparation of a galena inhibitor ZJ2001. The ZJ201 is used for inhibiting lead sulfide ore at first, and then ethyl thio carbamate is used for flotation of the lead sulfide ore; and the lead sulfide ore suppressed by ZJ2001 can be floated without any activation in advance. The self-made galena inhibitor ZJ2001 is capable of efficiently separating various minerals in the copper lead sulfide minerals, substantially improves the recovery rate and quality of the copper concentrate and the lead concentrate, and has the advantages of no toxicity, environment friendliness, low usage amount, low cost, safety in addition, convenience in usage, promotion and application value in the flotation separation of copper lead sulfide minerals, etc. The method of the invention is applicable to the field of mineral processing.

Description

technical field [0001] The invention relates to a method for preferential flotation of copper-lead sulfide minerals, which is suitable for application in the field of mineral processing. Background technique [0002] With the improvement of the comprehensive utilization of resources, most non-ferrous metal mines will adopt the method of flotation to recover pyrite from the tailings. Pyrite is widely used in roasting to make acid, and the content of iron in pyrite slag is relatively high. , can be used as raw material for ironmaking. [0003] Pyrite is mostly obtained by flotation from the tailings of non-ferrous metal beneficiation, often accompanied by non-ferrous metals such as copper. Acid leaching is usually used in acid plants to recover copper from pyrite slag. However, due to pyrite The sulfur content of the pyrite ore is greater than 45%, which makes the boiling and roasting temperature of the pyrite ore 850-950°C higher, causing most of the copper in the pyrite sla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/00B03D1/018B03D1/08B03D101/06B03D103/02
CPCB03D1/00B03D1/018B03D1/08B03D2201/06B03D2203/02
Inventor 李国尧衷水平鲁军梁治安黄雄
Owner ZIJIN MINING GROUP
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