国外某高铝赤褐铁矿选矿试验研究

摘要

对国外某高铝赤褐铁矿进行了选矿试验研究.采用还原磁化焙烧-磁选工艺,可获得精矿铁品位58.26％、铁回收率80.53％的试验指标;采用钠化还原磁化焙烧-磁选工艺,可获得精矿铁品位63.48％、回收率95.45％的试验指标.探索了在富集铁的同时富集镍、降低铁精矿中Al2 O3含量的可行性.%Experimental study was carried out on beneficiation of a high-aluminum hematite-limonite ore from abroad. Test with processes of reduction magnetic roasting-magnetic separation yielded a concentrate approaching 58.26％ Fe grade at 80.53％ recovery, while test adopting reduction magnetic roasting by adding sodium salts followed by magnetic separation resulted in 95.45％ recovery to concentrate grading 63.48％ Fe. Meanwhile, the feasibility for nickel enrichment and Al2 O3 reduction in iron concentrates whilst enriching iron was investigated.