TY - JOUR T2 - Journal of Mining and Metallurgy, Section B: Metallurgy TI - Reduction behavior of tin-containing phase in tin-bearing iron concentrates under CO-CO2 mixed gases VL - 55 IS - 2 SP - 177 EP - 185 PY - 2019 DO - 10.2298/JMMB181121025Y AU - Y. Yu AU - H.-J. Li AU - L. Li AD - a State Key Laboratory of Complex Non-ferrous Metal Resources Clean Utilization, Engineering Research Center of Metallurgical Energy Conservation and Emission Reduction of Ministry of Education, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, China b Quality Development Institute, Kunming University of Science and Technology, Kunming, China AB - The main purpose of this study was to ascertain the reduction behavior of tin phase (SnO2) in tin-bearing iron concentrates at the respective temperature of 1273 and 1373 K in diverse CO-CO2 mixed gases using chemical analysis, XRD, and SEMEDS analysis. The results show that the reduction behavior of SnO2 depends on the roasting temperature and CO content. At 1273 K, the SnO2 will be reduced to Sn (l) with the CO content being higher than 17.26 vol%, and there is no formation of SnO(s). With the temperature increased to 1373 K, the SnO2 is reduced stepwise in the order to form SnO2 → SnO (l) → Sn(l) with CO content over 15.75 vol%. The kinetic study shows that activation energy of the reaction SnO 2(s)+CO(g)=Sn(l)+ CO2(g) is 144.75 kJ/mol at 1073-1223 K, being far lower than the one in the reduction of SnO2(s) into SnO(g) at 1273-1323 K, which leads to a conclusion that the tin in tin-bearing iron concentrates could be removed effectively after the Sn(l) sulfurated into SnS at relatively lower temperatures (1073-1223 K) using the sulfidation roasting method. KW - Reduction behavior KW - SnO2; CO-CO2 mixed gases KW - Kinetics KW - Tin-bearing iron concentrates N1 - Correspondence Address: H.-J. Li, a State Key Laboratory of Complex Non-ferrous Metal Resources Clean Utilization, Engineering Research Center of Metallurgical Energy Conservation and Emission Reduction of Ministry of Education, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, China b Quality Development Institute, Kunming University of Science and Technology, Kunming, China email: 252972286@qq.com N1 - J. Min. Metall. Sect. B-Metall. 55 (2) B (2019) 177-185. DOI:10.2298/JMMB181121025Y PB - Technical Faculty in Bor SN - 14505339 (ISSN) LA - English J2 - J. Min. Metall. Sect. B Metall. M3 - Article ER