A method for preparing copper ingots using scrap copper materials

By employing oxygen-enriched side-blown smelting, gas-phase refining, and ultrasound-assisted in-situ synthesis, the problems of deep purification and nano-reinforced phase agglomeration of low-quality scrap copper were solved, resulting in the preparation of high-performance copper ingots suitable for high-end materials.

CN121006458BActive Publication Date: 2026-01-30HUBEI XINSHENG COPPER CO LTD
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Patent Information

Application Number
CN202511547621.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-10-28
Publication Date
2026-01-30
Estimated Expiration
2045-10-28

AI Technical Summary

Technical Problem

Existing technologies are unable to effectively solve the problems of deep purification of low-quality scrap copper and easy agglomeration of nano-reinforcing phases in molten copper, resulting in low product purity, unstable performance, and inability to prepare high-performance composite materials.

Method used

The process involves initial purification using oxygen-enriched side-blown melting combined with molecular-capturing flux, followed by controllable oxygen potential gas-phase refining to remove tin and zinc impurities. Then, under vacuum conditions, nano-titanium carbide reinforcing phases are synthesized in situ with ultrasonic field assistance, and finally cast using an electromagnetic crystallizer to form high-performance copper ingots.

Benefits of technology

It achieves efficient and deep purification of low-quality scrap copper, uniform dispersion of nano-reinforced phase, and produces high-purity, high-performance copper ingots suitable for high-end materials fields.

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Abstract

This application provides a method for preparing copper ingots from scrap copper materials, belonging to the field of scrap copper refining. The method includes: adding scrap copper materials and a composite flux into an oxygen-enriched side-blown smelting furnace, and injecting oxygen and fuel through the tuyeres on the side wall of the furnace to obtain a first copper liquid; introducing a mixed gas composed of water vapor and nitrogen into the bottom of the first copper liquid to obtain a second copper liquid; heating the second copper liquid to 1380–1450°C under vacuum conditions, adding titanium-containing and carbon-containing substances to the melt, and simultaneously subjecting the melt to ultrasonic field treatment; adding an aluminum-rare earth alloy to the melt, and continuing ultrasonic field treatment for 5–10 minutes to obtain a nano-reinforced copper-based composite melt; and casting the nano-reinforced copper-based composite melt into an electromagnetic crystallizer to obtain copper ingots. This method achieves high-value recycling of low-quality scrap copper and simultaneously solves the problem of easy agglomeration of the nano-reinforced phase in molten copper.
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