欢迎访问《金属矿山》杂志官方网站,今天是 分享到:
×

扫码分享

金属矿山 ›› 2014, Vol. 43 ›› Issue (09): 43-47.

• 矿物工程 • 上一篇    下一篇

某海滨铁砂矿流态化气基还原—高温熔分试验

刘瑛1,郭汉杰1,郭磊2,李永麒1,孙贯永1   

  1. 1.北京科技大学冶金与生态工程学院,北京 100083;2.钢铁冶金新技术国家重点实验室,北京 100083
  • 出版日期:2014-09-15 发布日期:2015-04-15

Fluidized Gas Reduction-High Temperature Smelting Tests of a Beach Iron Placer

Liu Ying1,Guo Hanjie1,Guo Lei2,Li Yongqi1,Sun Guanyong1   

  1. 1.School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China;2.Stake Key Laboratory of Advanced Metallurgy,Beijing 100083,China
  • Online:2014-09-15 Published:2015-04-15

摘要: 为了确定印度尼西亚某海滨铁砂矿的合理开发利用方案,在模拟流化床的竖直管式炉内,以CO与H2的混合气体为还原剂,对该海滨铁砂矿进行了直接还原试验,并对最佳条件下的还原产物进行了熔分条件试验。结果表明:①反应温度和还原气氛对还原效果影响显著,在还原温度为900 ℃、还原气体H2和CO的体积比为7∶3、还原时间为80 min情况下,还原产物中铁的还原度为96.11%、铁的金属化率为93.40%。②确定条件下的还原产物适宜的熔分温度为1 570 ℃、碱度为1.2、熔分时间为15 min,对应的铁回收率为92.99%。因此,流态化气基还原—高温熔分工艺是该海滨铁砂矿开发利用的有效工艺。

关键词: 海滨铁砂矿, 流态化气基还原, 流化床, 高温熔分, 还原度, 金属化率

Abstract: In order to find a reasonable development and utilization program for a beach placer in Indonesia,the direct reduction experiments using CO-H2 gas mixture as reducing gas were conducted in a vertical tubular resistance furnace.Smelting tests on products obtained at optimum condition were conducted.The results revealed that ① both reaction temperature and reduction circumstances can dramatically influence the reaction efficiency,reduction products with iron reduction degree of 96.11% and metallization ratio of 93.40% was obtained at conditions of volume ratio of H2 to CO 7〖DK(〗∶〖DK)〗3,and reducing temperature at 900 ℃ for 80 min.② under the optimum smelting temperature 1 570 ℃,alkalinity 1.2,smelting time 15 min for the reduction products,the recovery of iron reached 92.99%.To sum up,the fluidized gas reduction-high temperature smelting process is an efficient process in developing the beach placer.

Key words: Beach iron placer, Fluidized gas reduction, Fluidized bed, High temperature smelting, Reduction degree, Metallization ratio