Recovery of iron from high phosphorus oolitic iron ore using coal-based reduction followed by magnetic separation
Recovery of iron from high phosphorus oolitic iron ore using coal-based reduction followed by magnetic separation
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DOI：
10.1007/s12613-013-0744-1
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发表时间：
2013-05
期刊：
影响因子：
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通讯作者：
Yong-sheng Sun;Yue-xin Han;Peng Gao;Ze-hong Wang;Duo-zhen Ren
中科院分区：
文献类型：
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作者：
Yong-sheng Sun;Yue-xin Han;Peng Gao;Ze-hong Wang;Duo-zhen Ren
鲕状铁矿是重要的铁矿资源之一。研究了煤基还原磁选法从高磷鲕状铁矿石中回收铁的工艺。研究了还原温度、还原时间、C/O摩尔比、CaO含量对金属化率和铁回收率的影响。实验结果表明，在最佳工艺条件下，可以得到金属化度为95.82%的还原产物，还原温度，1250°C;还原时间，50分钟; C/O摩尔比，2.0;和CaO含量，10重量%）。获得含铁89.63wt%、铁回收率96.21%的磁精矿。根据矿物学和形态学分析，铁矿物已被还原，铁主要以球形颗粒的形式富集到包埋在渣基体中的金属铁相中。磷灰石也被还原为磷，其部分迁移到金属铁相中。
Oolitic iron ore is one of the most important iron resources. This paper reports the recovery of iron from high phosphorus oolitic iron ore using coal-based reduction and magnetic separation. The influences of reduction temperature, reduction time, C/O mole ratio, and CaO content on the metallization degree and iron recovery were investigated in detail. Experimental results show that reduced products with the metallization degree of 95.82% could be produced under the optimal conditions (i.e., reduction temperature, 1250°C; reduction time, 50 min; C/O mole ratio, 2.0; and CaO content, 10wt%). The magnetic concentrate containing 89.63wt% Fe with the iron recovery of 96.21% was obtained. According to the mineralogical and morphologic analysis, the iron minerals had been reduced and iron was mainly enriched into the metallic iron phase embedded in the slag matrix in the form of spherical particles. Apatite was also reduced to phosphorus, which partially migrated into the metallic iron phase.