Copper liquid deoxidation method

Through top blowing, hydrogen is introduced and combined with pressurized dissolution, reaction smelting, reduced pressure exhaust and exhaust gas circulation and recovery methods, the problems of poor copper liquid pollution and reduction effects in the copper smelting industry are solved, and the efficient deoxygenation and clean and environmentally friendly smelting process of copper liquid are achieved.

CN116043030BActive Publication Date: 2025-03-28WUHAN UNIV OF SCI & TECH
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Patent Information

Application Number
CN202310061289.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-01-20
Publication Date
2025-03-28
Estimated Expiration
2043-01-20

AI Technical Summary

Technical Problem

During the refining process of crude copper fire in the existing copper smelting industry, the use of fossil fuels leads to copper liquid pollution, resource waste and environmental pollution, and the reduction effect is poor, making it difficult to effectively remove oxides.

Method used

The hydrogen is introduced by the top blowing method, and through four stages: pressurized dissolution, reaction smelting, reduced pressure exhaust and exhaust gas circulation and recovery, the high-efficiency deoxygenation reaction of the crude copper melt pool is carried out, and the gas recycling and utilization is realized.

Benefits of technology

It achieves efficient deoxidation of copper liquid, avoids the introduction of impurities and fossil fuel pollution, reduces resource waste and environmental pollution, widens the casting temperature window, and improves the cleanliness and environmental protection of the smelting process.

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Abstract

The present invention discloses a method for deoxidizing molten copper, which introduces hydrogen by top blowing, and carries out efficient deoxidation of a blister copper bath through four stages of pressurized dissolution, reaction smelting, decompression exhaust, and tail gas circulation. By combining the top blowing means with the high-pressure smelting-decompression exhaust means, pressurization is used to promote the dissolution of hydrogen so that the deoxidation reaction can be fully carried out, and at the same time, decompression is used to fully escape the water vapor generated by the reaction and the excess hydrogen dissolved in the melt, and the hydrogen collected after drying and dust removal of the obtained tail gas can be recycled, thereby realizing the fine deoxidation smelting of blister copper, and the smelting process does not introduce other impurity elements, thereby avoiding the pollution of the blister copper bath by fossil fuels; the means of decompression exhaust improves the degassing rate of the bath, effectively reduces the dissolution of hydrogen and oxygen elements in the bath, and is conducive to the development of the subsequent electrolytic refining process. The whole process has the advantages of excellent deoxidation effect and clean and environmental protection.
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