还原剂种类对高磷鲕状赤铁矿直接还原提铁降磷的影响  

Effects of Reductant Types on Direct Reduction and Phosphorus Removal of High-phosphorus Oolitic Hematite Ore

作　　者：李永利[1] 孙体昌[1] 徐承焱[1] 

机构地区：[1]北京科技大学金属矿山高效开采与安全教育部重点实验室,北京100083

出　　处：《矿冶工程》2012年第4期66-69,共4页Mining and Metallurgical Engineering

基　　金：国家自然科学基金项目(51074016)

摘　　要：以褐煤、烟煤、无烟煤、焦炭为还原剂,使用直接还原-磨矿-磁选的方法,对高磷鲕状赤铁矿煤基直接还原提铁降磷过程进行了详细研究。结果表明:不同温度条件下,不同还原剂对还原铁的铁品位、铁回收率和磷品位影响趋势相同。在1 150℃时,焦炭对直接还原提铁降磷并没有明显优势,调节不同煤或者焦炭的用量都可以达到铁品位90%以上,磷品位0.1%以下,铁回收率80%以上的指标;另外煤的变质程度越高,所需煤用量越少。With lignite, bituminous coal, anthracite and coke as reductant, the process of coal-based direct reduction and phosphorus removal of high-phosphorus oolitic hematite was studied by using the technique of direct reduction-grinding- magnetic separation. The results showed that different reductants had similar tendency of impact on the iron grade, iron recovery and phosphorus content under different temperatures. At 1 150℃, coke had no obvious advantage in the direct reduction for iron upgrading and phosphorus removal. Adjusting the dosages of different coals or coke can obtain iron grade of over 90%, phosphorus content below 0.1% and iron recovery of 80%. Moreover, the higher the coal rank, the less the coal dosage.

关 键 词：高磷鲕状赤铁矿 直接还原 脱磷 还原铁 烟煤 褐煤 无烟煤 焦炭 

分 类 号：TF111[冶金工程—冶金物理化学]