A copper-removing composition for secondary lead refining and its application

A composite and recycled lead technology, which is applied in the field of non-ferrous metal smelting, can solve the problems of difficult control of the reaction process, increase the cost of lead refining, and affect the effect of copper treatment, etc., so as to prolong the reaction and treatment time, shorten the refining and copper removal time, and improve The effect of copper removal efficiency

Active Publication Date: 2018-01-02
ZHEJIANG TIANNENG POWER SOURCE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the temperature of the lead liquid is high, the reaction process is difficult to control, and it is easy to cause the combustion of sulfur element to generate SO 2 Released into the atmosphere, it is easy to cause air pollution. At the same time, the amount of sulfur used is large, the utilization rate is low (the utilization rate is less than 80wt%), and the cost of lead refining is increased.
However, if the copper is not treated in time during the slagging process, and the time left is too long, the reverse growth of copper will occur, causing the copper to be discharged into the lead liquid again, which will affect the treatment effect of copper.
At the same time, lowering the temperature of the system to near the melting point of lead will cause the lead liquid to become viscous, which will easily cause the loss of lead liquid during the copper scum salvage process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Put regenerated lead into the smelting pot, the feeding amount is 90% of the capacity of the smelting pot, heat up to melt, use a colander to scoop out the impurities to get the regenerated lead liquid, when the furnace temperature of the smelting pot rises to 580℃~620℃, Add 0.02wt% white coal of the total weight of the regenerated lead liquid, stir for several minutes, wait for the white coal to burn fully, salvage lead ash and lead slag to obtain crude lead liquid.

[0049] Turn on the mixer, put in 0.06wt% sodium nitrate and 0.02wt% sodium hydroxide of the total amount of crude lead liquid under stirring, and continue stirring for 30 minutes until the scum on the surface of the lead liquid is yellow-gray granular, then turn off the mixer, and use a colander to Remove the scum to get antimony and lead liquid.

[0050] The temperature of the above-mentioned antimony and lead removal liquid is lowered to 450°C to 500°C, and a copper removal composition whose mass is 0.2...

Embodiment 2

[0059] Put regenerated lead into the smelting pot, the feeding amount is 90% of the capacity of the smelting pot, heat up to melt, use a colander to scoop out the impurities to get the regenerated lead liquid, when the furnace temperature of the smelting pot rises to 580℃~620℃, Add 0.03wt% white coal of the total weight of the regenerated lead liquid, stir for several minutes, wait for the white coal to burn fully, salvage lead ash and lead slag to obtain crude lead liquid.

[0060] Turn on the mixer, put in 0.1wt% sodium nitrate and 0.05wt% sodium hydroxide of the total amount of crude lead liquid under stirring, and continue stirring for 30 minutes until the scum on the surface of the lead liquid is yellow-gray granular, then turn off the mixer, and use a colander to Remove the scum to get antimony and lead liquid.

[0061] Under stirring, the copper removal composition whose quality is 0.1wt% of the total amount of the antimony lead liquid is dropped into the above-mentione...

Embodiment 3

[0070] Put regenerated lead into the smelting pot, the feeding amount is 90% of the capacity of the smelting pot, heat up to melt, use a colander to scoop out the impurities to get the regenerated lead liquid, when the furnace temperature of the smelting pot rises to 580℃~620℃, Add white coal with a total weight of 0.01wt% of the regenerated lead liquid, stir for several minutes, and wait for the white coal to burn completely, then salvage lead ash and lead slag to obtain crude lead liquid.

[0071] Turn on the mixer, put in 0.02wt% sodium nitrate and 0.005wt% sodium hydroxide of the total amount of crude lead liquid under stirring, and continue stirring for 30 minutes until the scum on the surface of the lead liquid is yellow-gray granular, then turn off the mixer, and use a colander to Remove the scum to get antimony and lead liquid.

[0072] The temperature of the above-mentioned antimony and lead removal liquid is lowered to 450°C to 500°C, and a copper removal composition...

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Abstract

The invention discloses a copper removal composition for secondary lead refining, the copper removal composition is composed of 30-45wt% Fe, 40-55wt% S, 3-15wt% SiO2 and 0.0002-0.02wt% The above-mentioned copper-removing composition is added into the lead liquid to carry out the copper-removal reaction. After the reaction, the copper scum is removed to obtain the copper-removal lead liquid. The copper-removal lead liquid is obtained after slagging and cleaning of caustic soda and ingot casting Refined lead. The invention also includes the application of the copper removal composition in secondary lead refining. The copper removal composition provided by the invention has a high removal rate of copper in lead liquid; the copper removal reaction process is smokeless and tasteless, and the working environment is good.

Description

technical field [0001] The invention relates to the field of nonferrous metal smelting, in particular to a copper-removing composition for secondary lead refining and its application. Background technique [0002] Lead is one of the most commonly used non-ferrous metals, and it can be used as a material for corrosion resistance to sulfuric acid, anti-rays, batteries, etc. The melting point of lead is 327.5°C, the boiling point is 1740°C, and the density is 11.3437g / cm 3 , the specific gravity of the density is very large, and most compounds will float on the top of the lead solution. Through this performance, the lead solution can be purified only after a simple salvage process. [0003] Secondary lead contains compounds such as arsenic, antimony, tin, tellurium, silver, bismuth, etc. The content of antimony in secondary lead is higher than that of copper, and the content of copper is generally about 0.001-0.3%. Secondary lead needs to be refined before it can be widely us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B13/06C22B9/10
Inventor 娄可柏胡建平张志勇
Owner ZHEJIANG TIANNENG POWER SOURCE MATERIAL
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