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Li L.,Kunming University of Science and Technology | Li L.,State Key Laboratory Breeding Base of Complex Nonferrous Metal Res Cleaning Utilization in Yunnan Province | Liao B.,Kunming University of Science and Technology | Liao B.,State Key Laboratory Breeding Base of Complex Nonferrous Metal Res Cleaning Utilization in Yunnan Province | And 8 more authors.
Guocheng Gongcheng Xuebao/The Chinese Journal of Process Engineering | Year: 2013

Based on the thermodynamic analysis, the removal process of tin from tin-bearing iron ores was studied by chemical and X-ray diffraction analysis. The results showed that raising roasting temperature and prolonging holding time were beneficial to increasing of the tin removal rate in a certain range. However, when the temperature increased above 1473 K, the calcium ferrite was cohesive, causing the unreacted tin-bearing particles being enclosed and tin removal rate being decreased. With increasing of addition of pyrite and anthracite, the tin removal rate increased first and then deceased. The tin content in the tin-bearing iron ore was decreased from 0.35% to 0.05% under the conditions of holding time 60 min, pyrite addition amount 5%(ω), anthracite addition amount 5%(ω), and N2 flow rate 15 L/h. Tin could be removed effectively from tin-bearing iron ore by sulfidation roasting. Source

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