Method for pre-separating lead and indium from bottom lead

A technology of pre-separation and lead solution, applied in the field of indium, pre-separation of lead from bottom lead, can solve the problems of waste of resources and high recovery cost of bottom lead and lead, and achieve the effect of solving the waste of resources

Inactive Publication Date: 2017-12-15
MAGUAN YUNNAN COPPER IND ZINC IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a method for pre-separating lead and indium from bottom lead, aiming to solve the problem of the bottom lead being difficult to be broken in the existing zinc pyrometallurgy production. The cost of recycling valuable metal indium and lead is high, and there is a problem of waste of resources in long-term accumulation in warehouses

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  • Method for pre-separating lead and indium from bottom lead

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Effect test

Embodiment 1

[0037] Put 1 ton of bottom lead into the melting furnace, raise the temperature to 500°C, melt all the bottom lead to obtain a molten liquid, control the temperature of the molten liquid at 400°C, and slowly add sodium hydroxide to the molten liquid while stirring 200kg, sodium nitrate 100kg, sodium chloride 50kg, after 4 hours of reaction, remove the scum on the upper layer of the bottom lead solution to realize the pre-separation of lead and indium. At this time, the indium remaining in the molten liquid accounted for 1% of the total indium amount.

Embodiment 2

[0039] Add 1 ton of bottom lead into the melting furnace, raise the temperature to 510°C, melt all the bottom lead to obtain a molten liquid, control the temperature of the molten liquid at 430°C, and slowly add sodium hydroxide to the molten liquid while stirring 220kg, 130kg of sodium nitrate, and 80kg of sodium chloride. After reacting for 5 hours, remove the scum on the upper layer of the bottom lead solution to realize the pre-separation of lead and indium. At this time, the indium remaining in the molten liquid accounted for 0.7% of the total indium amount.

Embodiment 3

[0041] Add 1 ton of bottom lead into the melting furnace, raise the temperature to 520°C, melt all the bottom lead to obtain a molten liquid, control the temperature of the molten liquid at 450°C, and slowly add sodium hydroxide to the molten liquid while stirring 250kg, 150kg of sodium nitrate, and 100kg of sodium chloride. After 6 hours of reaction, remove the scum on the upper layer of the bottom lead solution to realize the pre-separation of lead and indium. At this time, the indium remaining in the molten liquid accounted for 0.5% of the total indium amount.

[0042] In summary, the present invention adopts that the bottom lead is melted at a high temperature, and sodium hydroxide, sodium nitrate and sodium chloride are added to the melted bottom lead to react to oxidize metal indium into sodium indium acid (Na 3 InO 3 ), at this time, sodium indium is dissolved in the solution of sodium hydroxide and sodium chloride to form scum and separate from lead, and the obtained ...

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Abstract

The invention discloses a method for pre-separating lead and indium from bottom lead. The method for pre-separating the lead and indium from the bottom lead comprises the following steps that (1), the bottom lead is heated and melted to obtain a melted liquid, and the melted liquid is kept at a preset temperature; (2), sodium hydroxide, sodium nitrate and sodium chloride are added to the melted liquid to perform a reaction, and a bottom lead solution with the surface containing scums is obtained after the reaction is performed for preset time; (3), the scums are fished out of the bottom lead solution, and the pre-separation of the lead and indium is achieved. By means of the method for pre-separating the lead and indium from the bottom lead, the problems that the recycling cost of the valuable metal indium and lead is high, and the waste of resources exists due to the fact that the bottom lead is difficult to break up in existing pyrogenic zinc-smelting production are solved.

Description

technical field [0001] The invention relates to the field of zinc smelting, in particular to a method for pre-separating lead and indium from bottom lead. Background technique [0002] In the existing pyrometallurgy production process, bottom lead will be produced after zinc steaming and slag removal. Bottom lead is a multi-element alloy and metal compound with lead as the main body. Since bottom lead contains valence metal indium and is difficult to be broken, the recovery cost of metal indium and lead is high and the recovery rate is low. For a long time, because there is no good recovery method for the indium and lead in the bottom lead, the bottom lead has been backlogged in the warehouse, resulting in a certain waste of resources. [0003] Therefore, the prior art still needs to be improved and developed. Contents of the invention [0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a method for pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B58/00C22B13/02
CPCC22B13/02C22B58/00Y02P10/20
Inventor 李城龙张少广陶家荣徐宏凯谭晓明杨荣净朱世波陈凯张泽林赵永喜杨勇斌
Owner MAGUAN YUNNAN COPPER IND ZINC IND
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