Method for removing copper ash through short kiln smelting

Through the oxidation, reduction and slag refining stage treatment in the short kiln smelting method, the problems of low copper element recovery and poor tail residue separation are solved, and efficient enrichment of copper elements and the improvement of smelting economic benefits are achieved.

CN119194079AActive Publication Date: 2024-12-27HUBEI CHUKAI METALLURGY
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Patent Information

Application Number
CN202411383361.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-09-30
Publication Date
2024-12-27
Estimated Expiration
2044-09-30

AI Technical Summary

Technical Problem

In the smelting process, copper elements are difficult to effectively recover, and the tailings and ice copper separation effect is poor, resulting in low copper recovery rate and external selling price.

Method used

The short kiln smelting method is adopted to remove copper ash through three stages: oxidation, reduction and slag refining. Only copper ash is put into removal in the oxidation stage, pig iron filings and anthracite are put into refining stage, and copper and tailings are released in the slag refining stage. Combustion power and oxygen-fuel ratio are used to improve the enrichment rate of copper elements.

Benefits of technology

Without adding smelting furnaces, by adjusting the existing smelting mode and ingredients, efficient enrichment of copper elements is achieved, copper recovery rate is improved, and the economic benefits of smelting are improved.

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Abstract

The invention provides a method for removing copper ash through short kiln smelting, and belongs to the field of non-ferrous metal smelting. According to the method provided by the invention, the copper element in the copper removal ash is enriched into the matte as much as possible, so that the recovery rate of copper is increased to the maximum extent. The smelting process comprises the three stages of oxidation, reduction and slag smelting, in the oxidation stage, only copper ash is added, and no auxiliary material is added; auxiliary materials fed in the reduction stage are raw scrap iron and anthracite; auxiliary materials are not added in the slag smelting stage; low-copper lead is mainly discharged in the oxidation stage and the reduction stage, and the lead element in the furnace is reduced as much as possible; and high-copper and low-lead matte and low-copper and low-lead tailings are discharged in the slag smelting stage. According to the method, on the premise that a new smelting furnace is not used, the effect of enriching copper is achieved by adjusting an existing smelting mode and ingredients and using a small amount of auxiliary materials, the yield of the copper element is increased, and the economic benefit of smelting is good.
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Citation Information

Patent Citations

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  • Method for recovering valuable metal from high-impurity-content copper-contained materials through double-top-blowing smelting

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    CN116411174A

  • Method for smelting tin ash in short kiln

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  • Method for refining matte in anode slag from lead antimony ore

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