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Lead and zinc tailing recycling method

A tailings, lead-zinc technology, applied in the direction of improving process efficiency, etc., can solve the problems of low leaching rate and high recycling cost of recycling technology, and achieve the effect of solving low leaching rate and reducing recycling cost

Active Publication Date: 2012-11-14
深圳市日昇生态科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of low leaching rate and high recovery cost in existing lead-zinc tailings recovery technology, the present invention provides a method for re-recycling lead-zinc tailings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Lead-zinc tailings recycling method, the method is to adopt the following steps to achieve:

[0009] 1) Mixing concentrated sulfuric acid and saturated sodium chloride solution to obtain leachate, the pH of the leachate is 0.5;

[0010] 2) Put the lead-zinc tailings slag in the mixing tank, then add leachate into the mixing tank and stir fully at 5°C to leach the lead ions, zinc ions and silver ions contained in the lead-zinc tailings slag; The mass ratio of lead-zinc tailings slag to leaching solution is 1:6; leaching time is 1 hour;

[0011] 3) Add sodium sulfide solution into the mixing tank and stir fully at 5°C, the leached lead ions and silver ions fully react with sodium sulfide respectively to form lead sulfide precipitation and silver sulfide precipitation; then lead sulfide precipitation, Silver sulfide precipitation is filtered, and obtain the filtrate that contains zinc ion;

[0012] 4) Add ammonium bicarbonate solution to the filtrate containing zinc ions...

Embodiment 2

[0014] Lead-zinc tailings recycling method, the method is to adopt the following steps to achieve:

[0015] 1) Mixing concentrated sulfuric acid and saturated sodium chloride solution to obtain leachate, the pH of the leachate is 1;

[0016] 2) Put the lead-zinc tailings slag in the mixing tank, then add leachate into the mixing tank and stir fully at 20°C to leach the lead ions, zinc ions and silver ions contained in the lead-zinc tailings slag; The mass ratio of lead-zinc tailings slag to leaching solution is 1:6; leaching time is 1 hour;

[0017] 3) Add sodium sulfide solution into the stirring tank and stir fully at 20°C, the leached lead ions and silver ions fully react with sodium sulfide respectively to form lead sulfide precipitation and silver sulfide precipitation; then lead sulfide precipitation, Silver sulfide precipitation is filtered, and obtain the filtrate that contains zinc ion;

[0018] 4) Add ammonium bicarbonate solution to the filtrate containing zinc io...

Embodiment 3

[0020] Lead-zinc tailings recycling method, the method is to adopt the following steps to achieve:

[0021] 1) Mixing concentrated sulfuric acid and saturated sodium chloride solution to obtain leachate, the pH of the leachate is 0.7;

[0022] 2) Put the lead-zinc tailings slag in the mixing tank, then add leachate into the mixing tank and stir fully at 12°C to leach the lead ions, zinc ions and silver ions contained in the lead-zinc tailings slag; The mass ratio of lead-zinc tailings slag to leaching solution is 1:6; leaching time is 1 hour;

[0023] 3) Add sodium sulfide solution into the mixing tank and stir fully at 12°C, the leached lead ions and silver ions fully react with sodium sulfide respectively to form lead sulfide precipitation and silver sulfide precipitation; then lead sulfide precipitation, Silver sulfide precipitation is filtered, and obtain the filtrate that contains zinc ion;

[0024] 4) Add ammonium bicarbonate solution to the filtrate containing zinc io...

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Abstract

The invention relates to a lead and zinc tailing recovery technique, in particular to a lead and zinc tailing recycling method, which solves the problems that the leaching efficiency is low and the recovery cost is high when the existing lead and zinc tailing recovery technique is adopted. The lead and zinc tailing recycling method is realized through the following steps of: 1) mixing concentrated sulfuric acid with saturated sodium chloride solution to obtain leaching solution; 2) placing lead and zinc tailing slag in an agitating tank, adding the leaching solution into the agitating tank and fully agitating at 5-20DEG C to leach lead ions, zinc ions and silver ions contained in the lead and zinc tailing slag; 3) adding sodium sulfide solution into the agitating tank and fully agitating at 5-20DEG C; and 4) adding ammonium hydrogen carbonate solution into filtrate containing the zinc ions and fully agitating at 5-30DEG C. The lead and zinc tailing recycling method effectively solves the problems that the leaching efficiency is low and the recovery cost is high when the existing lead and zinc tailing recovery technology is adopted, and is suitable for recovery of lead and zinc tailing.

Description

technical field [0001] The invention relates to a recovery technology of lead-zinc tailings, in particular to a method for recycling lead-zinc tailings. Background technique [0002] According to statistics, each ton of lead-zinc tailings usually contains about 20kg of lead, 35kg of zinc and 200g of silver. Therefore, lead-zinc tailings contain economic value for further recycling. However, the existing lead-zinc tailings recycling technology generally has the problems of low leaching rate and high recycling cost due to its own principle limitation. For this reason, it is necessary to invent a brand-new lead-zinc tailings recycling technology to solve the problems of low leaching rate and high recovery cost of the existing lead-zinc tailings recovery technology. Contents of the invention [0003] In order to solve the problems of low leaching rate and high recovery cost in the existing lead-zinc tailings recovery technology, the invention provides a method for re-recycli...

Claims

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Application Information

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IPC IPC(8): C22B3/08C22B3/44C22B11/00C22B13/00C22B19/00
CPCY02P10/20
Inventor 张晋敏
Owner 深圳市日昇生态科技股份有限公司
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