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Method for treating lead anode slime

A lead anode slime and solution technology, applied in chemical instruments and methods, improvement of process efficiency, instruments, etc., can solve the problems of mechanical loss, harsh operating environment, large labor load, etc., and achieve high direct yield and good operating environment. , the effect of high production efficiency

Inactive Publication Date: 2013-07-17
ANHUI TONGGUAN NONFERROUS METALS (CHIZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This material preparation process will produce a large amount of poisonous gas and dust, the operating environment is harsh, the labor load is large, and there is a certain mechanical loss

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for processing lead anode slime, comprising the following steps:

[0024] (1) Put the lead anode slime in a HCl solution with a concentration of 5mol / L or a solution containing 5mol / L of HCl and FeCl 2 In the mixed solution of 3.5mol / L, the weight-to-volume ratio of the lead anode slime to the solution is 1:3. After stirring and reacting for 20-35 minutes, add a hydrogen peroxide solution with a concentration of 50% to stir and react, so that the reaction system The oxidation-reduction electrode potential is 400mv, and the selective leaching reaction is carried out at a temperature of 60°C for 1.5h to obtain acid leaching solution and acid leaching residue;

[0025] (2) Add the above-mentioned acid leaching residue to a sodium hydroxide solution with a concentration of 25%, the mass volume ratio of the acid leaching residue to the sodium hydroxide solution is 2:1, stirring and leaching at 85°C for 2 hours, and then filtering to obtain lead-containing alkali lea...

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PUM

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Abstract

The invention discloses a method for treating lead anode slime. The method has the advantages that preparation procedures for oxidization and state transition, fine grinding and the like are omitted, and the method is applicable to treating freshly produced anode slime; hydrogen peroxide solution is used as a leached oxidant and can be used safely and conveniently; the reaction speed and the production efficiency are high, and the method is suitable for batch production; reagents can be recycled, discharge of waste water containing heavy metal is prevented, and the direct yield and the recovery rate are high; precious metal and base metal which are separated from each other by a wet process can react at a low temperature, the direct gold yield and the direct silver yield are high, and an operation environment is good; interfering ions are omitted, process conditions are easy to control, and technical indexes are stable; and the method is thorough in comprehensive recovery performance and is obvious in merits of energy conservation and environmental protection, and particularly, arsenic pollution can be prevented.

Description

technical field [0001] The invention mainly relates to a method for processing lead anode slime, which belongs to the field of nonferrous metal hydrometallurgy. Background technique [0002] Lead anode slime is a by-product of crude lead electrolytic refining, which enriches a large amount of gold, silver, antimony, bismuth, lead, arsenic, copper and other associated elements, and its treatment can be divided into two types: fire method and wet method. The fire method-electrolysis method is the traditional treatment method. The lead anode slime is firstly reduced and smelted into noble lead, then refined into gold-silver alloy by blowing oxygen, and then electrolyzed into pure silver. Gold is extracted from the anode slime of silver electrolysis. This method oxidizes base metals other than gold and silver into oxidized states, which are produced in the form of slag and smoke. At the same time, some gold and silver are dispersed in the dust, resulting in a low direct reco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B30/02C22B30/06C22B30/04C22B13/00C25C1/20C01G49/10C01G28/00
CPCY02P10/20
Inventor 李连军陈海大袁永新丁伯忠
Owner ANHUI TONGGUAN NONFERROUS METALS (CHIZHOU) CO LTD
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