Preparation of Metallic Iron Powder from Pyrite Cinder by Carbothermic Reduction and Magnetic SeparationReport as inadecuate




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School of Metallurgical Engineering, Anhui University of Technology, Ma’anshan 243002, China





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Academic Editor: Corby G. Anderson

Abstract The reduction and magnetic separation procedure of pyrite cinder in the presence of a borax additive was performed for the preparation of reduced powder. The effects of borax dosage, reduction temperature, reduction time and grinding fineness were investigated. The results show that when pyrite cinder briquettes with 5% borax were pre-oxidized at 1050 °C for 10 min, and reduced at 1050 °C for 80 min, with the grinding fineness <0.44 mm passing 81%, the iron recovery was 91.71% and the iron grade of the magnetic concentrate was 92.98%. In addition, the microstructures of the products were analyzed by optical microscope, scanning electron microscope SEM, and mineralography, and the products were also studied by the X-ray powder diffraction technique XRD to investigate the mechanism; the results show that the borax additive was approved as a good additive to improve the separation of iron and gangue. View Full-Text

Keywords: pyrite cinder; carbothermic reduction; magnetic separation; metallic iron powder pyrite cinder; carbothermic reduction; magnetic separation; metallic iron powder





Author: Hongming Long, Tiejun Chun * , Zhanxia Di, Ping Wang, Qingmin Meng and Jiaxin Li

Source: http://mdpi.com/



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