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Zhao Q.,Key Laboratory for Ecological Metallurgy of Multimetallic Ores Ministry of Education Northeastern UniversityShenyang110819China | Liu C.,Key Laboratory for Ecological Metallurgy of Multimetallic Ores Ministry of Education Northeastern UniversityShenyang110819China | Zhang B.,Key Laboratory for Ecological Metallurgy of Multimetallic Ores Ministry of Education Northeastern UniversityShenyang110819China | Jiang M.,Key Laboratory for Ecological Metallurgy of Multimetallic Ores Ministry of Education Northeastern UniversityShenyang110819China | And 3 more authors.
Steel Research International | Year: 2015

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 2h 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. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source

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