Reduction behavior of tin-bearing iron concentrate pellets using diverse coals as reducers

详细信息	查看全文 | 推荐本文 |

• 作者：Y.B. Zhang¹ ; ^{zybcsu@126.com} ; G.H. Li ; T. Jiang ; ^{jiangtao@csu.edu.cn} ; Y.F. Guo ; Z.C. Huang
• 关键词：Iron ore ; Reduction roasting ; Tin ; Coal reactivity
• 刊名：International Journal of Mineral Processing
• 出版年：2012
• 期刊代码：43_03017516
• 类别：ce
• 出版时间：18 July, 2012
• 卷：110-111
• 期：Complete
• 页码：109-116
• 文件大小：1590 K

摘要

Using optical microscopy, XRD, SEM, and EDS, the effects of diverse coals on the reduction behavior of tin-bearing iron concentrate pellets were studied in this research. The results indicated that anthracite and coke breeze could be used as suitable reducers to separate tin from the tin-bearing iron concentrate pellets. Lignite and semi-coke with good reactivity accelerated the generation of metallic iron and metallic tin and caused Fe-Sn alloy to easily form in the reduced pellets; this had an adverse effect on tin volatilization from the roasted pellets. When using anthracite and coke breeze as reducers, the majority of the tin was effectively volatilized as SnO_(g) at higher temperature. The finished pellets contained a large amount of recrystallized wustite, some unreduced magnetite, and a small amount of metallic iron. Some fayalite also formed in all of the reduced pellets but was incompletely crystallized.