摘要
对铁品位高达48.05%的某氰化尾渣进行了直接还原焙烧—磁选试验研究。结果表明,在烟煤2用量为20%,还原温度为1 150℃,还原时间为40 min,还原产物磨矿细度为-0.074 mm占78%,1次弱磁选磁场强度为87.56 kA/m情况下获得了铁品位为94.11%、回收率为90.14%的还原铁粉。该工艺不仅高效地富集了铁,而且使硫等含量较高的有害成分富集到了尾矿中。
Experimental research on cyanided tailings containing 48.05% grade of iron by the process of direct reduc- tion roast-magnetic separation tests was carried out. The results indicated that under the condition of roasting at 1 150 ℃ for 40 min with 20% bituminous coal 2, and grinding fineness of -0. 074 mm 78% and magnetic intensity, the DRI with Fe grade of 94. 11% and recovery of 90. 14% was obtained by the process of one roughing low intensity magnetic separation with intensity of 87.56 kA/m. In the process, iron was concentrated efficiently, meanwhile high content of harmful ingredi- ents, sulfur are enriched into tailings.
出处
《金属矿山》
CAS
北大核心
2012年第11期145-147,共3页
Metal Mine
关键词
氰化尾渣
直接还原焙烧
磁选
还原铁粉
Cyanided tailings, Direct reducing roast, Magnetic separation, Direct reduction iron
