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Lead anode plate low-temperature casting process

A lead anode and plate low-temperature technology, which is applied in the field of lead fire smelting, can solve the problems of affecting the current efficiency of lead electrolysis, affecting economic benefits, and incomplete copper removal, so as to avoid foamed lead, improve purity, and eliminate foamed lead.

Active Publication Date: 2019-08-30
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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  • Lead anode plate low-temperature casting process

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Effect test

Embodiment 1

[0037] 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 330°C, the obtained copper-free 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 produced 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 pyrometallurgy, and relates to a lead anode plate low-temperature casting process. With the process, a crude lead liquid is subjected to continuous copper removal to obtain an impurity-removed lead liquid; after the impurity-removed lead liquid is cooled to 330-340 DEG C, copper in the impurity-removed lead liquid is further removed through the cooling dissolution; and then casting is carried out under the constant-temperature condition of 330-340 DEG C to obtain a lead anode plate. Compared with the existing lead anode plate casting process, the process has the beneficial effects that the cooling dissolution ensures the deep removal of the copper and other impurities, improves the purity of the anode plate, prevents the anode plate from generating foamed lead, and improves the current efficiency of lead electrolysis. Meanwhile, the consumption of natural gas is reduced due to the fact that casting temperature is low.

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 Applications(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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