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A kind of comprehensive recovery method of lead-zinc-silver mixed concentrate

A technology of mixing concentrate and recovery method, applied in the direction of improving process efficiency, can solve the problems of low recovery rate, high cost, high sulfur content in lead concentrate, and achieve low construction and renovation costs, elimination of inhibition, and simple operation. Effect

Inactive Publication Date: 2014-10-22
招金矿业股份有限公司金翅岭金矿
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high sulfur content of lead concentrate and a certain amount of impurities such as copper and zinc that are harmful to the production of crude lead, it needs to be mixed in a limited amount, otherwise it will cause difficulties in sintering and smelting, affect various technical and economic indicators, and There are problems such as high cost, low recovery rate, and serious environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The number of lead-zinc-silver mixed concentrate used in this example is A1, its gold content is 3.26g / t, silver content is 2802.25g / t, lead content is 14.73%, zinc content is 12.5%, sulfur content is 29.62%, take 10 tons are used in embodiment 1.

[0022] First, mix the lead-zinc-silver concentrate A1 with water in a stirring tank, then add 40kg of sodium phosphate, and stir for 10 minutes (sodium phosphate can also be added during the pulping process); the obtained pulp enters a ball mill for grinding, The mass fraction of ore powder less than 0.0375 microns is 93%; after grinding, settling filtration is carried out to obtain the first filtrate and filter cake; the filter cake is re-slurried with water and / or the lean liquid produced in the following steps to obtain the primary pulp. In the above steps, the first filtrate is used to replace water to carry out the operation of water mixing in the stirring tank, or the water and the first filtrate are used simultaneous...

Embodiment 2

[0027] The number of lead-zinc-silver mixed concentrate used in this example is A2, its gold content is 4.32g / t, silver content is 2632.26g / t, lead content is 13.65%, zinc content is 11.8%, sulfur content is 28.32%, take 15 tons are used in embodiment 2.

[0028] First, mix the lead-zinc-silver concentrate A1 with water in a stirring tank, then add 75kg of sodium phosphate, and stir for 10 minutes (sodium phosphate can also be added during the slurry mixing process); the obtained slurry enters a ball mill for grinding, The mass fraction less than 0.0375 micron ore powder is 92%; carry out settling filtration after ore grinding to obtain the first filtrate and filter cake; re-slurry the filter cake with water and / or the barren solution produced in the following steps to obtain primary pulp. Using the lean liquid produced in the following steps for re-sizing can more fully recover valuable metals and improve the recovery rate.

[0029] Sodium cyanide is added to the primary pu...

Embodiment 3

[0033] The number of lead-zinc-silver mixed concentrate used in this example is A3, its gold content is 3.85g / t, silver content is 2728.65g / t, lead content is 12.85%, zinc content is 12.3%, sulfur content is 28.65%, take 20 tons are used in embodiment 3.

[0034] First, mix lead-zinc-silver concentrate A1 with water in a stirring tank, then add 120kg of sodium phosphate, and stir for 10 minutes (sodium phosphate can also be added during the slurry mixing process); the obtained pulp enters a ball mill for grinding, grinding The mass fraction less than 0.0375 micron ore powder is 94%; carry out settling filtration after ore grinding to obtain the first filtrate and filter cake; re-slurry the filter cake with water and / or the barren solution produced in the following steps to obtain primary pulp.

[0035] Sodium cyanide is added to the primary pulp, and cyanide leaching is carried out in the cyanide leaching tank; the amount of sodium cyanide added during the cyanide leaching pr...

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PUM

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Abstract

The invention relates to a lead-zinc-silver mixed concentrate comprehensive recovering method. The method comprises the following steps of pulping lead-zinc-silver mixed concentrate, adding sodium phosphate into the obtained ore pulp, carrying out the ore grinding, sedimentation and filtering on the ore pulp to obtain a first filter liquor and a filter cake; pulping the filter cake again to obtain the primary ore pulp; adding sodium cyanide into the primary ore pulp to carry out the cyanide leaching, carrying out the solid-liquid separation and washing to obtain a pregnant solution and leached slag; adding zinc powder into the pregnant solution to carry out the replacement, then filtering the pregnant solution to obtain gold mud and a second filtering liquor, wherein the second filtering liquor is barren liquor; and pulping the leached slag, adding hydrogen peroxide for activation, and adding floatation reagent for floatation, wherein the concentrate obtained through the floatation is lead-zinc concentrate, and the tailing is the sulfur concentrate. By adopting the method, the comprehensive recovery of multiple valuable elements in the lead-zinc-silver mixed concentrate can be realized. The method is a wet-method reaction process and is simple to operate, low in cost, low in construction and modification cost and easy to implement and hardly causes pollution.

Description

technical field [0001] The invention relates to the technical field of recovery of mixed concentrates, in particular to a method for comprehensive recovery of lead-zinc-silver mixed concentrates. Background technique [0002] With the deep mining of mineral resources, there are more and more polymetallic associated minerals, especially lead-zinc-silver minerals. These minerals can be enriched through flotation, but it is very difficult to separate them. At present, for lead-zinc-silver mixed concentrate, it is generally mixed with lead concentrate for smelting, and after a series of pyrotechnic processes, gold and silver are finally recovered from lead electrolysis anode slime. However, due to the high sulfur content of lead concentrate and a certain amount of impurities such as copper and zinc that are harmful to the production of crude lead, it needs to be mixed in a limited amount, otherwise it will cause difficulties in sintering and smelting, affect various technical an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/00C22B11/00C22B13/00C22B19/02
CPCY02P10/20
Inventor 徐忠敏翁占平何毅高利发毕凤琳李俊杰
Owner 招金矿业股份有限公司金翅岭金矿