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Method for recovering valuable metals by electrolysis of high bismuth crude lead

A valuable metal, electrolytic recovery technology, applied in the direction of photography technology, instruments, photography auxiliary technology, etc., can solve the problem of no reported processing method, and achieve the effect of broadening the adaptability of raw materials, excellent recovery rate index, and high efficiency

Active Publication Date: 2017-10-10
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, in the face of the above-mentioned high-bismuth crude lead containing bismuth up to several times or even more than ten times, the literature in the field of electrolytic lead technology has not yet reported a treatment method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for recovering valuable metals by electrolysis of high bismuth crude lead: has the following steps:

[0020] 1. Mix and match high-bismuth crude lead containing 26.38% bismuth with crude lead containing less than 1.0% bismuth, and produce an anode plate after preliminary refining by fire method. The composition is as follows: Pb 86.22%, Bi 8.53%, Cu 0.09 %, Sb 2.51%, As 0.15%, Ag0.76%;

[0021] 2. Put the above-mentioned anode plate into the electrolytic cell for electrolytic refining. The process conditions are: current density 120 A / m 2 , cell voltage 0.40V, electrolyte circulation speed 26 l / min, electrolyte temperature 33°C, electrolyte solution containing lead ions 70g / l, total acid 160g / l, free acid 80g / l;

[0022] 3. After 24 hours of electrolytic refining, the anode plate in the electrolytic tank is lifted out and sent to the anode scrap washing machine for mechanical cleaning, and then hoisted into a special tank for manual cleaning with high-pressure...

Embodiment 2

[0026] A method for recovering valuable metals by electrolysis of high bismuth crude lead: has the following steps:

[0027] 1. Reasonably mix crude lead, and properly control the composition of the anode plate; that is, mix and match high-bismuth crude lead containing 35% bismuth with crude lead containing 0.2% bismuth, and then add 5% lead scum or lead dioxide ash by total weight , the anode plate is produced after preliminary refining by fire method, and its composition is as follows: Pb 88.31%, Bi 8.41%, Cu 0.10%, Sb 2.32%, As 0.19%, Ag 0.67%;

[0028] 2. Put the above-mentioned anode plate into the electrolytic cell for electrolytic refining, replenish lead ions in time to ensure the composition of the electrolyte; the process conditions are: current density 110 A / m 2 , cell voltage 0.50V, electrolyte circulation speed 20 l / min, electrolyte temperature 35°C, electrolyte solution containing lead ions 75 g / l, total acid 155 g / l, free acid 78 g / l;

[0029] 3. After 24 hours...

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Abstract

The invention relates to a method for electrolyzing and recycling valuable metal from high-bismuth lead bullion, and belongs to the field of nonferrous metallurgy. The method comprises the steps that the lead bullion is rationally combined, and compositions of an anode plate are properly controlled; the current density is properly reduced, and the cell voltage is controlled; lead ions are supplemented in time, and compositions of electrolytes are ensured; a washing operation system of the anode plate is adjusted; final refining is carried out; and a qualified lead ingot is obtained. According to the method, the requirement for lead and bismuth contained in the lead bullion in an existing production technology is broken through, and the method allows the lead-contained range in a lead anode to be expanded to more than 85% and the bismuth-contained range to be expanded to smaller than or equal to 10%; and through electrolytic refining, the qualified lead ingot is produced, and the aim of rapidly recycling the valuable metal such as the bismuth, gold and silver is achieved.

Description

technical field [0001] The invention belongs to the field of nonferrous metal metallurgy, and relates to a method for recovering valuable metals by electrolysis of high-bismuth crude lead. technical background [0002] The electrolytic lead factories at home and abroad all use crude lead as raw material. While producing electrolytic lead through electrolytic refining, other valuable metals in the crude lead are recovered. With the increasing output and consumption of non-ferrous metals in my country, the structural contradictions in the non-ferrous metal industry have been intensified, the resources of non-ferrous metals have become increasingly tense, the main grade of ores has continued to decline, and the content of impurities has continued to increase. Relevant metallurgical enterprises have developed secondary resources in order to survive and develop in the fierce market competition. Using secondary resources to produce crude lead has complex components and a large fl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C1/18C22B13/00
CPCC22B13/00C25C1/18
Inventor 杨跃新刘金铭粟明辉张剑峰欧亚晖
Owner CHENZHOU CITY JINGUI SILVER IND CO LTD
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