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Method for recycling valuable metal from silver electrolysis mother liquor copper deposition drags

A technology of valuable metals and copper slag, applied to the improvement of process efficiency, photographic technology, instruments, etc., can solve the problems of high anti-corrosion requirements, low metal recovery rate, high production cost, etc., and achieve significant economic benefits and metal recovery. The effect of high efficiency and low environmental pollution

Active Publication Date: 2018-05-25
CHENZHOU CITY JINGUI SILVER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process of this treatment method is long, the operation is complicated, the production cost is high, and the metal recovery rate is low. In addition, since chloride ions enter the system, the requirements for equipment anticorrosion are high.

Method used

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  • Method for recycling valuable metal from silver electrolysis mother liquor copper deposition drags

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take by weighing 200g silver electrolysis mother liquor copper precipitation slag (wherein containing Pb0.61%, Bi0.51%, Ag15.13%, Cu35.02%) and put into beaker, adding concentration is that the nitric acid of 85g / L carries out leaching, and control nitric acid and The liquid-solid ratio of the copper precipitation slag is 5:1, the temperature is 30°C, the stirring speed is 600r / min, and the reaction is carried out for 45 minutes under constant stirring. After the copper precipitation slag is completely dissolved, the leaching solution is obtained. After washing, insert it into the leaching solution for silver replacement, filter and separate after replacement for 1 hour to obtain sponge silver powder and replacement solution, and add enough Na to the replacement solution 2 S to deposit valuable metals such as copper, bismuth and lead, and filter to obtain metal slag, and then return the obtained metal slag to the smelting system to recover copper, bismuth and lead, the c...

Embodiment 2

[0021] Take by weighing 200g silver electrolysis mother liquor copper precipitation slag (wherein containing Pb0.44%, Bi0.36%, Ag13.22%, Cu32.17%) and put into beaker, add the nitric acid that concentration is 75g / L and carry out leaching, control nitric acid and The liquid-solid ratio of the copper precipitation slag is 6:1, the temperature is 60°C, the stirring speed is 500r / min, and the reaction is continued for 30 minutes under constant stirring. After the copper precipitation slag is completely dissolved, adjust the pH to 0.5, clean the copper sheet and insert it into the leach solution Replace silver in the medium, filter and separate after replacing for 2 hours, obtain sponge silver powder and replacement liquid, add enough Na to the replacement liquid 2 S deposits valuable metals such as copper, bismuth, lead, etc., filters to obtain metal slag, and then returns the obtained metal slag to the smelting system to recover copper, bismuth and lead, the contents of which are...

Embodiment 3

[0023] Take by weighing 200g silver electrolysis mother liquor copper precipitation slag (wherein containing Pb0.57%, Bi0.49%, Ag14.64%, Cu34.16%) and put into beaker, add the nitric acid that concentration is 110g / L and carry out leaching, control nitric acid and The liquid-solid ratio of the copper precipitation slag is 4:1, the temperature is 85°C, the stirring speed is 700r / min, and the reaction is continued for 60 minutes under constant stirring. After the copper precipitation slag is completely dissolved, adjust the pH to 1.5, clean the copper sheet and insert it into the leaching solution Replace silver in the medium, filter and separate after 4 hours to obtain sponge silver powder and replacement liquid, add enough Na to the replacement liquid 2 S to deposit valuable metals such as copper, bismuth, lead, etc., filter to obtain metal slag, and then return the obtained metal slag to the smelting system to recover copper, bismuth and lead, the contents are respectively Cu3...

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Abstract

The invention discloses a method for recycling valuable metal from silver electrolysis mother liquor copper deposition drags. The method comprises the steps of (1) nitric acid leaching, wherein nitricacid is added into the silver electrolysis mother liquor copper deposition drags, and leachate is obtained; (2) silver replacing with copper sheets, wherein the thoroughly cleaned copper sheets are taken and inserted into the leachate, the pH is controlled to be equal to 0.5 to 1.5, and sponge silver powder and displacement liquid are obtained; (3) valuable metal deposition, wherein Na2S is addedinto the displacement liquid for deposition of copper, bismuth, lead and other valuable metal, and metal residues are obtained; (4) valuable metal recycling, wherein the obtained metal residues are returned into a smelting system, and copper, bismuth and lead are recycled; and (5) silver recycling, wherein the sponge silver powder is cast, then a silver electrolysis procedure is carried out, andsilver is obtained. The method has the beneficial effects of being good in environmental friendliness performance, simple in process, convenient to operate, high in comprehensive recycling degree andthe like.

Description

technical field [0001] The invention belongs to the field of nonferrous metallurgy wet methods, and in particular relates to a method for recovering valuable metals from silver electrolysis mother liquor and copper precipitation slag. Background technique [0002] In the silver electrolytic refining process, when impurities such as bismuth, copper, palladium, lead in the silver electrolyte accumulate to a certain extent, it is necessary to purify the electrolytic mother liquor in order to realize the open circuit of impurity elements. The traditional silver electrolytic mother liquor purification method is Add caustic soda or silver oxide to the mother liquor to adjust the pH, so that most of the impurities such as lead, bismuth, copper, palladium and some silver are hydrolyzed and precipitated. Pb: 0.1-2.0%; Bi: 0.5-8.0%; Ag: 8-40%; Cu: 15-35%, mainly in the form of hydroxide and oxide. [0003] At present, domestic treatment of silver electrolysis mother liquid copper pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B11/00C22B15/00C22B30/06C22B13/00C25C1/20
CPCC22B7/001C22B7/007C22B11/042C22B13/025C22B13/045C22B15/0054C22B15/0073C22B30/06C25C1/20Y02P10/20
Inventor 黄前军黄鹏飞陈兰粟明辉
Owner CHENZHOU CITY JINGUI SILVER IND CO LTD
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