Li Lei, Zhu Hongbo, Peng Jinhui, Zhang Libo, Dai Linqing, Wu Kuilin. Preparation of Low-carbon Ferrochromium from Chromite Fines by Microwave Silicothermic Reduction[J]. IRON STEEL VANADIUM TITANIUM, 2015, 36(4): 134-139. doi: 10.7513/j.issn.1004-7638.2015.04.024
Citation:
Li Lei, Zhu Hongbo, Peng Jinhui, Zhang Libo, Dai Linqing, Wu Kuilin. Preparation of Low-carbon Ferrochromium from Chromite Fines by Microwave Silicothermic Reduction[J]. IRON STEEL VANADIUM TITANIUM, 2015, 36(4): 134-139. doi: 10.7513/j.issn.1004-7638.2015.04.024
Li Lei, Zhu Hongbo, Peng Jinhui, Zhang Libo, Dai Linqing, Wu Kuilin. Preparation of Low-carbon Ferrochromium from Chromite Fines by Microwave Silicothermic Reduction[J]. IRON STEEL VANADIUM TITANIUM, 2015, 36(4): 134-139. doi: 10.7513/j.issn.1004-7638.2015.04.024
Citation:
Li Lei, Zhu Hongbo, Peng Jinhui, Zhang Libo, Dai Linqing, Wu Kuilin. Preparation of Low-carbon Ferrochromium from Chromite Fines by Microwave Silicothermic Reduction[J]. IRON STEEL VANADIUM TITANIUM, 2015, 36(4): 134-139. doi: 10.7513/j.issn.1004-7638.2015.04.024
Yunnan Provincial Key Laboratory of Intensification Metallurgy, National Local Joint Engineering Laboratory of Engineering Application of Microwave Energy and Equipment Technology, Faculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China
To achieve chromite fines resources utilization effectively,the new process of preparation of low-carbon ferrochromium from chromite fines by microwave silicothermic reduction was investigated.FactSage software was used to simulate the ternary slag （SiO2-CaO-Cr2O3） and the binary slag （SiO2-CaO）,in order to generate the optimum technological conditions in combination with experimental data.The results show that with combining parameters of final temperature at 1 450 ℃ and binary basicity of 1.64,ferrochrome and slag can be entirely separated during the reaction and the recovery of chromium reach to 81.03%. XRD and XRF analysis on the phase and chemical composition of the products indicate that ferrochrome does not contain the slag and its chemical composition meet the standard of FeCr55C25 Ⅱ. SEM observation and EDX analysis show that crystalline grain contains tiny amounts of Si and C mainly distribute in the grain boundary.
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