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A kind of preparation method of lead-containing electrolyte

A preparation method and technology of lead electrolyte, which are applied to the improvement of process efficiency, photographic technology, instruments, etc., can solve the problems of shortening boiler life, difficult waste water treatment, low crude lead yield, etc., to save production costs, realize The effect of reuse, energy consumption and low cost

Active Publication Date: 2017-06-20
CHENZHOU CITY JINGUI SILVER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pyrochemical treatment of lead oxide scum requires raising the furnace temperature to a high temperature above 1000°C, high energy consumption, low yield of crude lead, and the presence of alkaline substances will corrode the boiler and shorten the life of the boiler
Wet treatment of lead oxide scum requires the addition of lead oxide scum to acidic or alkaline solutions, resulting in a large amount of wastewater that is difficult to handle and liquid-solid separation is also very troublesome

Method used

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  • A kind of preparation method of lead-containing electrolyte
  • A kind of preparation method of lead-containing electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Get 500g dry lead oxide scum, which contains 88.22% lead, 0.1907% antimony, 0.23% copper, and 0.0015% bismuth. The specific steps for preparing lead-containing electrolyte are as follows:

[0028] (1) roasting: put the lead peroxide scum into an electric furnace for roasting, and roast for 2 hours at a temperature of 550°C;

[0029] (2) One-time water washing: crush and ball-mill the roasted product obtained in step (1) to below 120 mesh, add water, the liquid-solid mass ratio is 6:1, control the temperature at 70°C, and stir for 2 hours until the pH is detected as 11-12, After filtering, the primary washing water enters the three-effect evaporator system;

[0030] (3) Secondary water washing: add water to the washed slag obtained in step (2) again, the liquid-solid mass ratio is 8:1, the temperature is 60°C, stir for 3 hours until the pH is 7-9, and the secondary washing water is returned once after filtering The washing water enters the three-effect evaporator system...

Embodiment 2

[0035] Get 1000g dry lead oxide scum, which contains 90.01% lead, 0.3673% antimony, 0.0014% copper, and 0.0006% bismuth. The specific steps for preparing lead-containing electrolyte are as follows:

[0036] (1) roasting: put the lead peroxide scum into an electric furnace for roasting, and roast for 4 hours at a temperature of 500°C;

[0037] (2) One-time water washing: crush and ball-mill the roasted product obtained in step (1) to below 120 mesh, add water, the liquid-solid mass ratio is 3:1, control the temperature at 90°C, and stir for 3 hours until the pH is detected as 11-12, After filtering, the primary washing water enters the three-effect evaporator system;

[0038] (3) Secondary water washing: add water to the washed slag obtained in step (2) again, the liquid-solid mass ratio is 4:1, the temperature is 80°C, and stir for 2 hours until the pH is detected as 7-9, and the secondary washing water is returned once after filtering The washing water enters the three-effec...

Embodiment 3

[0042] Get 500g dry lead oxide scum, which contains 87.56% lead, 0.2358% antimony, 0.0019% copper, and 0.0010% bismuth. The specific steps for preparing lead-containing electrolyte are as follows:

[0043] (1) roasting: put the lead peroxide scum into an electric furnace for roasting, and roast for 3 hours at a temperature of 530°C;

[0044] (2) One-time water washing: crush and ball-mill the roasted product obtained in step (1) to below 120 mesh, add water, the liquid-solid mass ratio is 4:1, control the temperature at 85°C, and stir for 2 hours until the pH is detected as 11-12, After filtering, the primary washing water enters the three-effect evaporator system;

[0045] (3) Secondary water washing: add water to the washed slag obtained in step (2) again, the liquid-solid mass ratio is 5:1, the temperature is 75°C, and stir for 3 hours until the pH is 7-9, and the secondary washing water is returned once after filtering The washing water enters the three-effect evaporator ...

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Abstract

The invention relates to the non-ferrous metal metallurgy field, in particular to a preparation method for leaded electrolyte. The preparation method for the leaded electrolyte is high in lead recovery, low in cost, easy to operate and capable of effectively using lead oxide scum. The preparation method for the leaded electrolyte uses the lead oxide scum as preparation raw material. The preparation method for the leaded electrolyte includes steps that (1) roasting, to be specific, roasting the lead oxide scum for 2 to 4 hours at 500 to 550 degrees centigrade; (2) primary washing, to be specific, crushing and ball milling the roasted substance obtained through the step (1) to less than 120 meshes, adding water, and stirring for a certain time till the pH is 11 to 12; (3) secondary washing, to be specific, adding water to the washed scum of the step (2), and stirring for a certain time till the pH is 7 to 9; (4) acid leaching, to be specific, adding the washed scum of the step (3) to fluosilicic acid solution, dissolving and leaching lead ions, and filtering to obtain the leaded electrolyte.

Description

technical field [0001] The invention relates to the field of nonferrous metal smelting, in particular to a preparation method of lead-containing electrolyte. Background technique [0002] At present, in the process of lead electrolytic refining, the impurity content of crude lead is relatively high, and the lead content cannot meet the requirements of electrolysis. In order to ensure the smooth progress of production, the common method is to add yellow lead to the lead electrolyte to supplement the concentration of lead ions. However, the production cost of Huang Dan is relatively high, which greatly increases the production cost. [0003] Lead oxide scum is produced in the process of lead melting and casting. The lead oxide scum is mainly a mixture of lead oxide, containing some impurities and a small amount of alkali. In production, the lead oxide scum is often treated by fire and wet methods, and finally it will be Lead oxide is reduced to lead and separated for extracti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/06C22B1/02C25C1/18
CPCY02P10/20
Inventor 粟明辉柴承平杨跃新谢兆凤
Owner CHENZHOU CITY JINGUI SILVER IND CO LTD
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