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Method for floatation and recovery of lead zinc mixed concentrate from gold mine cyaniding slag tails

A technology for cyaniding tailings and mixed concentrates, applied in flotation, process efficiency improvement, solid separation, etc., can solve problems such as excess flotation reagents, high cyanide concentration, and impact, and achieve good flotation effect, The effect of high recovery rate of lead and zinc

Inactive Publication Date: 2006-11-22
青岛黄金铅锌开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cyanide tailings contain a large amount of slime, cyanide and excessive flotation reagents, which will have a great impact on the subsequent lead-zinc flotation process
Due to the fine grinding particle size, serious ore mudification, excess flotation reagents, and high cyanide concentration, these factors not only affect the grade of lead-zinc minerals, but also affect the recovery rate of lead-zinc

Method used

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  • Method for floatation and recovery of lead zinc mixed concentrate from gold mine cyaniding slag tails
  • Method for floatation and recovery of lead zinc mixed concentrate from gold mine cyaniding slag tails

Examples

Experimental program
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Embodiment

[0030] (1) Pretreatment of gold ore cyanidation tailings:

[0031] Add water to the cyanide tailings, stir to form a slurry, add activated carbon and YO chemicals to the slurry,

[0032] The pretreatment process conditions are:

[0033] Pulp concentration: 35%

[0034] Activated carbon dosage: 1.3Kg / T

[0035] Dosage of YO agent: 0.2Kg / T, YO agent component is 1 part of FeSO 4 +3 parts ammonium persulfate

[0036] Stirring time: 30 minutes

[0037] (2) Asynchronous mixed selection:

[0038] Pump the pretreated ore slurry to the flotation unit I for the first step of roughing, add YO agent, lime, butyl xanthate, and float the galena; send the tailings slurry after the first step of roughing to Go to the flotation unit II, then enter the second step of roughing, add YO reagent, lime, copper sulfate, butyl xanthate, and flotation sphalerite.

[0039] The process conditions of asynchronous mixed selection are:

[0040] The first rough selection: PH value: 9

[0041] YO: 5...

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Abstract

The invention discloses a lead-zinc floating recycling method from gold ore cyanation tailings, which comprises the following steps: (1) predisposing: adding water in the cyanation tailings; stirring to form ore paste; adding active carbon, Y0 agent, FeSO4+ammonium persulphate in the ore paste; (2) asynchronous mixing-selecting: sending the predisposed ore paste to the floater group I to proceed first roughing separation; adding Y0 agent, limestone, butyl airpotato yam to float galena; sending the tailings in the first roughing separation to floater group II; adding Y0 agent, limestone, cupric sulfate, butyl airpotato yam to float zincblende; (3) recycling and purifying tailing water: adding chlorinated lime in the tailing water to decompose CN- less than 0.5 mg per L; recycling the tailing water.

Description

Technical field [0001] The invention belongs to a method for separating useful metal minerals and gangue minerals in minerals, in particular to a method for recovering lead-zinc minerals from gold mine cyanide tailings. Background technique [0002] At the beginning of the 20th century, gold extraction by cyanidation was widely used in industry. At present, about 80% of the new gold mines in the world use the cyanidation method to extract gold. At present, the development of this process has reached a very high level in the world. Cyanide dissolves gold, and there is a big drawback that it is highly toxic. Over the years, people have tried to replace it with other less toxic leaching agents. Research in this area has made great progress in recent years. The developed leaching agents include thiourea, chlorine, bromine, iodine, nitrogen, thiocyanate, and thiosulfate, but because cyanide dissolves gold effectively , the recovery effect is the best, so the cyanide gold extr...

Claims

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Application Information

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IPC IPC(8): C22B3/04B03D1/002C22B3/24C22B13/00C22B19/00
CPCY02P10/20
Inventor 王明勤孙书平吴向阳
Owner 青岛黄金铅锌开发有限公司
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