Magnetizing roast and magnetic separation of iron in rare-earth tailings

被引：0

作者：

杨合 ^{[1
]}

荣宜 ^{[1
]}

韩冲 ^{[1
]}

唐荣 ^{[1
]}

薛向欣 ^{[1
]}

李勇 ^{[1
]}

李英楠 ^{[1
]}

机构：

[1] School of Metallurgy, Northeastern University

来源：

Journal of Central South University | 2016年 / 23卷 / 08期

基金：

中央高校基本科研业务费专项资金资助; 中国国家自然科学基金;

关键词：

rare-earth tailings; iron; magnetizing roast; magnetic separation; iron grade; iron recovery;

D O I：

暂无

中图分类号：

TD926.4 []; TD924 [电磁选矿];

学科分类号：

摘要：

Magnetic separation of iron in rare-earth tailings was achieved by magnetizing roast process with coal as reductant. Effects of the temperature, carbon to oxygen ratio, and cooling type on magnetic susceptibility and composition of rare-earth tailings were investigated. The results show that roast conditions with the temperature of 650 °C, carbon to oxygen ratio of 3.85, and holding time of 2.5 h are in favor of reduction of Fe;O;to Fe;O;when the roasted rare-earth tailings is cooled along with furnace. Under these roast conditions, magnetic susceptibility of rare-earth tailings is 2.36 that is very close to theoretical value（2.33）. However, magnetic separation results of iron in rare-earth tailings cooled along with furnace are not satisfactory. Through comparing magnetic separation results of iron in rare-earth tailings cooled by different ways, it is found that water cooling is more favored of magnetic separation of iron in the roasted rare-earth tailings than furnace cooling and air cooling. Grade and recovery of iron in concentrate from rare-earth tailings cooled by water are 45.00%-49.00% and 65.00%-77.50%, respectively.

引用

页码：1899 / 1905

页数：7

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