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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 15    No. 4    August 2005

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Fundamental study on utilization of tin and zinc-bearing iron concentrate by selective chlorination
JIANG Tao(姜 涛), ZHANG Yuan-bo(张元波),
 HUANG Zhu-cheng(黄柱成), LI Guang-hui(李光辉), 
GUO Yu-feng(郭宇峰), YANG Yong-bin(杨永斌), JIN Yong-shi(金勇士)

School of Resources Processing and Bioengineering, Central South University, Changsha 410083, China

Abstract: The feasibility and technologies of comprehensive recovery of tin, zinc, arsenic and iron from the complex iron ores by selective chlorination roasting were studied by thermodynamic analysis and roasting experiments. Investigation shows that the product pellets with the compression strength of 2625N/P, the tumble index of 97.26%, the abrasion index of 1.35%, tin, arsenic and zinc residue of 0.043%, 0.046% and 0.058% respectively can be achieved if balling a concentrate containing 0.39% tin, 0.40% arsenic and 0.28% with addition of 8% coke breeze and 0.5% CaCl2 and roasting the pellets at 1060-1080℃ for 40min. The volatilization of tin, arsenic and zinc is 91.75%, 93.42% and 81.12% respectively. The performances of the product pellets are able to meet the requirements of blast furnace ironmaking.

 

Key words: selective chlorination; comprehensive recovery; tin; zinc; complex iron ore 

ISSN 1672-7029
CN 43-1423/U

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