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A low-temperature casting process of lead anode plate

A low-temperature technology for lead anodes and plates, applied in the field of lead pyrometallurgy, can solve the problems of incomplete copper removal, affect economic benefits, affect the current efficiency of lead electrolysis, etc., and achieve the effects of avoiding lead foam, improving purity, and eliminating lead foam.

Active Publication Date: 2022-02-11
JIANGXI COPPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most smelters adopt the process of casting lead anode plates as follows: the crude lead is smelted to remove copper in the decopper pot, and after copper removal, the copper content of the lead liquid is about 0.12%, or even higher, and then the temperature of the lead liquid is controlled to 370 Casting at -390°C, due to incomplete copper removal, there is a certain amount of foamed lead in the cast anode plate, after the anode plate with foamed lead is electrolyzed, the foamed lead floats on the surface of the electrolytic cell, forming a short circuit, which seriously affects the The current efficiency of lead electrolysis, which in turn affects economic benefits

Method used

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  • A low-temperature casting process of lead anode plate

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Effect test

Embodiment 1

[0037] The crude lead liquid is added to the continuous decopper furnace, and sulfur is added according to the copper content of the lead liquid to obtain lead matte and impurity-removing lead liquid. Carry out elution and decopper at 330°C, and the obtained copper-removing lead solution contains 0.065wt% copper, then keep the temperature at 330°C, and perform casting to obtain a lead anode plate containing less than 0.04wt% copper, and no lead foam is generated during the casting process.

Embodiment 2

[0039] Add crude lead liquid to the continuous decopper furnace, add sulfur according to the calculation of copper content in lead liquid, obtain lead matte and lead liquid for removing impurities, lead liquid for removing impurities contains less than 1wt% copper, then cool the lead liquid for removing impurities to Carry out elution and decopper at 335°C, and the obtained copper-removing lead solution contains 0.067wt% copper, and then keep the temperature at 335°C, and perform casting to obtain a lead anode plate containing less than 0.04wt% copper, and no lead foam is generated during the casting process.

Embodiment 3

[0041] Add crude lead liquid to the continuous decopper furnace, add sulfur according to the calculation of copper content in lead liquid, obtain lead matte and lead liquid for removing impurities, lead liquid for removing impurities contains less than 1wt% copper, then cool the lead liquid for removing impurities to Carry out elution and decopper at 340°C, the obtained copper-free lead solution contains 0.07wt% copper, then keep the temperature at 340°C, and perform casting to obtain a lead anode plate containing less than 0.05wt% copper, and no lead foam is produced during the casting process.

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Abstract

The invention belongs to the field of lead fire smelting, and relates to a low-temperature casting process for lead anode plates. In the process, crude lead liquid is first decoppered continuously to obtain impurity-removing lead liquid, and then the impurity-removing lead liquid is cooled to 330-340°C. Copper in the impurity-removing lead solution is further removed by cooling and elution, and then casting is carried out at a constant temperature of 330-340°C to obtain a lead anode plate. Compared with the existing lead anode plate casting process, the beneficial effects of the present invention are: the cooling and dissolution ensures the deep removal of copper and other impurities, improves the purity of the anode plate, prevents the occurrence of foamed lead on the anode plate, and improves the efficiency of lead electrolysis. Current efficiency; at the same time, due to the low casting temperature, the natural gas consumption is reduced.

Description

technical field [0001] The invention belongs to the field of lead pyrometallurgy and relates to a low-temperature casting process for lead anode plates. Background technique [0002] At present, most smelters adopt the process of casting lead anode plates as follows: the crude lead is smelted to remove copper in the decopper pot, and after copper removal, the copper content of the lead liquid is about 0.12%, or even higher, and then the temperature of the lead liquid is controlled to 370 Casting at -390°C, due to incomplete copper removal, there is a certain amount of foamed lead in the cast anode plate, after the anode plate with foamed lead is electrolyzed, the foamed lead floats on the surface of the electrolytic cell, forming a short circuit, which seriously affects the The current efficiency of lead electrolysis affects the economic benefits. Facing the problem of lead foam on the anode plate. Contents of the invention [0003] In order to solve the above problems, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B13/06C22B9/10C22B9/02B22D25/04
CPCC22B13/06C22B9/10C22B9/02B22D25/04Y02P10/20
Inventor 谢斌郭建荣荆旭冬段永红赵海亮陈龙
Owner JIANGXI COPPER
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