Study on extraction of iron from chromite

Qing Zhao, Chengjun Liu, Bo Zhang, Maofa Jiang, Qi Jie, Henrik Saxén, Ron Zevenhoven

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Abstract

Research about extraction of iron from chemical-grade South African chromite by carbothermic reduction and hydrochloric acid leaching was conducted in this study. It was found that temperature had a remarkable effect on the extraction yield of iron and that the optimum experimental temperature was 1100 °C, which coincides with the theoretically predicted value. The effect of reduction duration and the process of precipitate development at 1100 °C were also investigated. It was found that selective reduction of iron reached near completion within 2 h with only minor loss of chromium. Results also demonstrated that 20% hydrochloric acid was strong enough to extract iron from the reduction product selectively and at the same time increased the porosity of the chromium-rich solid particle. Ultimately, there is a clear improvement of the Cr/Fe ratio, Cr2O3% and specific surface area of chromite, and magnetite was obtained as by-product.
Original languageUndefined/Unknown
Pages (from-to)1541–1547
JournalSteel Research International
Volume86
Issue number12
DOIs
Publication statusPublished - 2015
MoE publication typeA1 Journal article-refereed

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