Method for reducing impurity bismuth ions in lead electrolyte

A technology of lead electrolyte and bismuth ions, which is applied in the field of lead electrolysis, and can solve problems such as hidden dangers in the quality of lead and increased bismuth content in lead.

Pending Publication Date: 2021-06-18
湖南省桂阳银星有色冶炼有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the continuous accumulation of bismuth ions in the electrolysis process of high-bismuth coarse lead brings hidden dangers to the quality of the lead or the sudden increase of bismuth in the lead due to accidental factors. Unfavorable consequences brought by the method, the pre

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] After running for a period of time, the high-bismuth crude lead electrolysis precipitated lead containing more than 30g / t of bismuth, and the concentration of bismuth ions in the test electrolyte was 0.0035g / L, which brought hidden dangers to the quality of electrolytic lead. This circulation system has a total of 360 electrolytic cells, and 6 reverse electrolytic cells are set at the end. In these 6 electrolytic cells, 18 cathode mother sheets are installed in half of the original cathode mother sheets, and 17 cathode mother sheets are installed between the mother sheets. The precipitated lead out of the normal tank is the same pain point as the normal electrolytic tank after installation. When the normal production cycle is 3 days, the reverse electrolytic tank cycle is set to 1 day, that is, it is lifted every day and the cathode and anode are exchanged and then reinstalled. Electrolysis continues in the tank.

[0013] After 5 days of operation, the electrolyte was t...

Embodiment 2

[0015] During the normal operation of the electrolysis, due to improper operation of the workers, the washing water without precipitation after the press filter was pumped directly into the electrolyte circulation system by mistake, resulting in the lead and bismuth content of the electrolysis reaching 65g / t, which exceeded the national standard of 40g / t for 1# electrolytic lead and bismuth Requirements, the test electrolyte containing bismuth up to 0.013g / L. The workshop immediately arranged to carry out reverse electrolysis on the 80 tanks that were ready to be released in the next two shifts on the same day. After two days of operation, 35g / t of lead and bismuth was produced, which reached the national 1# electric lead standard. , resume normal production in the shortest possible time.

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Abstract

The invention discloses a method for reducing impurity bismuth ions in a lead electrolyte. The technical problem to be solved is that potential hazards are brought to the quality of electrolytic lead due to continuous accumulation of bismuth ions in the electrolysis process of high-bismuth lead bullion or the bismuth content of the electrolytic lead is suddenly increased due to accidental factors; and for the adverse consequences brought by two common treatment methods, under the conditions that production is not stopped for a long time and a large amount of unqualified precipitated lead is not produced, long-time normal and stable production of the high-bismuth lead bullion is realized or the problem of unqualified electrolytic lead caused by the accidental factors is quickly solved.

Description

technical field [0001] The invention relates to the technical field of lead electrolysis, in particular to a method for reducing impurity bismuth ions in lead electrolyte. Background technique [0002] The invention relates to the technical field of lead electrolysis, in particular to a method for reducing impurity bismuth ions in lead electrolyte. As the grade of lead concentrate continues to decline, the grade of crude lead produced by lead smelting enterprises also continues to decrease, while impurity elements continue to increase, especially bismuth, which is the main impurity element in lead electrolysis. The electrolysis of high-bismuth crude lead brings great hidden dangers to normal production. With the prolongation of electrolysis time, bismuth ions accumulate in the electrolyte, and after reaching a certain level, they will be precipitated in the precipitated lead, resulting in the precipitation of bismuth in lead. It is difficult to sell more than 20g / t, and eve...

Claims

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Application Information

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IPC IPC(8): C25C1/18
CPCC25C1/18
Inventor 蔡鑫尹升
Owner 湖南省桂阳银星有色冶炼有限公司
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