Method for wet processing of high antimony-lead anode mud

A technology of wet treatment and anode slime, which is applied in the direction of chemical instruments and methods, antimony compounds, process efficiency improvement, etc., can solve the problems of incomplete treatment, achieve low production cost, high direct antimony recovery rate, and benefit the environment The effect of protection

Inactive Publication Date: 2010-07-28
广西华锡集团股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method of controlled electric chlorination leaching only considers the separation of noble and base metals, and does not involve the change of the valence state of antimony ions in the process of chlorination leaching.

Method used

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  • Method for wet processing of high antimony-lead anode mud

Examples

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Embodiment 1

[0022] With content being (wt%): Sb70.52, Ag0.722, Pb11.72, As1.13, Bi1.78, the high antimony lead anode slime of Cu1.02, press the high antimony lead anode slime in 8M hydrochloric acid medium The degree of oxidation and the liquid-solid ratio required by the concentration of 400g / l Sb in the leaching solution are used to carry out one-stage chlorination leaching through chlorine, and the oxidation-reduction potential at the end point of the first-stage chlorination leaching is controlled at 200mv for 3 hours, and there is no pentavalent antimony ion in the first-stage chlorination leaching solution Standard: the first-stage chlorination leaching residue is passed through chlorine in 2M hydrochloric acid medium for second-stage chlorination leaching, and the oxidation-reduction potential at the end point of the second-stage chlorination leaching is controlled at 400mv for 3 hours, and the second-stage chlorination leaching solution is returned to the next batch of first-stage c...

Embodiment 2

[0026] The content is (wt%): Sb63.6, Ag1.08, Pb12.64, As4.04, Bi3.31, the high antimony lead anode slime of Cu1.47, press the high antimony lead anode slime in 12M hydrochloric acid medium The degree of oxidation and the liquid-solid ratio required by the concentration of 500g / lSb in the leachate are used to carry out one-stage chlorination leaching with chlorine, and the oxidation-reduction potential at the end point of the first-stage chlorination leaching is controlled at 300mv for 3 hours. The standard is that there is no pentavalent antimony ion in the first-stage chlorination leachate. The first stage of chlorination leaching slag is passed through chlorine in 4M hydrochloric acid medium to carry out second stage chlorination leaching, and the oxidation-reduction potential of the end point of the second stage chlorination leaching is controlled at 450mv for leaching for 3 hours, and the second stage chlorination leaching solution is returned to the next batch of one stage ...

Embodiment 3

[0029] With the high antimony lead anode slime described in Example 2, in 10M hydrochloric acid medium, according to the oxidation degree of high antimony lead anode slime and the liquid-solid ratio of leaching solution 500g / L Sb concentration requirement, carry out one stage of chlorine chlorination leaching, control one stage chlorine The oxidation-reduction potential at the end point of the chemical leaching is leached at 280mv for 3 hours, based on the absence of pentavalent antimony ions in the first-stage chlorinated leaching solution; The oxidation-reduction potential of the end point of chlorination leaching is leaching at 400mv for 3 hours, and the second-stage chlorination leaching solution is returned to the next batch of first-stage chlorination leaching, and 99.3% of gold and 99% of silver are enriched in the second-stage chlorination leaching residue.

[0030] Concentrate the chlorinated leaching solution with the composition (g / l): Sb492.16, Ag0.43, Pb2.76, As31.55...

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Abstract

The invention discloses a method for wet processing of high antimony-lead anode mud, which comprises the following steps: putting high antimony-lead anode mud of which the content of antimony generated during the lead electrolysis is between 40% and 75% in hydrochloric aid medium, adopting two-section electric potential control of chlorination leaching, wherein oxidation-reduction potential of the end point of the first section chlorination leaching is controlled to be between 200-300mv, while oxidation-reduction potential of the end point of the second chlorination leaching is controlled to be 400-450mv, and 99.5% of golden and 99% of silver are enriched in the slag of the second chlorination leaching and can be subjected to further process. The silicofluoric acid in the first section chloridizing leachate is evaporated by concentration and distillation, the high-purity antimony butter is prepared from distilled and concentrated mother liquor by a continuous distillation method, and the yield of antimony metal is 95%.

Description

technical field [0001] The invention relates to a nonferrous metal hydrometallurgy method. In particular, it is a method for wet treatment of high antimony lead anode slime. Background technique [0002] Lead anode slime is one of the main raw materials for extracting metallic silver and gold, and the traditional treatment method is fire method. Lead anode slime is reduced and smelted to obtain precious lead, soot and thin slag, precious lead is oxidized and refined to remove lead and separate silver to obtain crude silver, and crude silver is electrolyzed to obtain product silver. The disadvantage of the fire method is that the direct silver recovery rate is low, and part of the silver is dispersed in the smoke and slag along with copper, antimony, bismuth, and arsenic. The smoke and slag are difficult to handle and comprehensive recovery is difficult. Chinese patent CN85106670 proposes a method for extracting precious metals from lead, antimony and nickel anode slime by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B3/06C22B11/06C22B13/00C01G30/00
CPCY02P10/20
Inventor 郑国渠陈进中廖春图曹华珍王学洪邓崇进叶有明
Owner 广西华锡集团股份有限公司
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