Preparation of novel reducing agent and its application in copper pyrorefining

Authors: Liu, Zhonghua; Chen, Wen; Shen, Qianghua

Source: Mineral Processing and Extractive Metallurgy, Volume 112, Number 2, 2003 , pp. 137-139(3)

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Abstract:

A novel type of carbonaceous reagent was studied as a substitute for charcoal or heavy oil in copper pyrorefining. Several carbonaceous substances (metallurgical coke, petroleum coke, peat, anthracite and brown coal) were tested and brown coal was found to be the best. Treatment with HNO₃, NaOH, H₂O₂ and H₂SO₄ was used to remove impurities from the brown coal. Most of the iron and sulphur was removed following treatment in H₂O₂+ HNO₃ solution. After adding quartz sand flux to decrease the melting point of the brown coal ash, the reagent was applied in copper pyrorefining. The novel substitute has been used successfully instead of charcoal and heavy oil in two industrial plants.

Keywords: REDUCING AGENTS; COPPER; BROWN COAL; PYROREFINING

Document Type: Technical Note

DOI: http://dx.doi.org/10.1179/037195503225002781

Publication date: 2003-08-01

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Australasian Institute of Mining and Metallurgy

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