铁矿石在含氢煤气中的还原行为研究  

Reduction behaviors of iron ore lump and pellets with H_2-CO gas

作　　者：李建[1] 朱锦明[2] 熊林[1] 赵晓岩[1] 林金嘉[2] 彭新[1] 

机构地区：[1]宝山钢铁股份有限公司研究院,上海201900 [2]宝山钢铁股份有限公司炼铁厂,上海200941

出　　处：《宝钢技术》2013年第2期18-22,共5页Baosteel Technology

基　　金：上海市科学技术委员会资助课题;编号为11QB1400200

摘　　要：通过低温还原粉化、静态荷重还原和熔滴试验,模拟COREX还原温度和含氢煤气条件,研究了球团和块矿还原行为的差异。结果表明,与球团相比,块矿因其结构致密、孔隙率低,导致其低温还原粉化率差,还原前中期还原速率慢,还原过程中强度低,开始软化和熔融温度低,熔融区间窄,最大压差高。为解释现场使用块矿后压差上升、金属化率下降、易黏结等生产现象提供一定依据。The differences of reduction behaviors between iron ore lump and pellets were studied by conducting low temperature reduction degradation, static load reduction and droplet tests. These tests simulated the conditions of reduction temperature and hydrogen-containing gas in COREX. Due to its dense structure and low porosity compared with pellets, lump ore possesses poor reduction degradation index （RDI） and slower reduction rate in early and medium reaction stages, showing signs of lower strength, lower softening and melting temperatures, as well as a wider melting zone and higher AP. That provides some basis to explain the phenomena of differential pressure rise, metallization decline and more sticking after the usage of lump ore in COREX plant.

关 键 词：还原行为 球团和块矿 H2-CO 

分 类 号：TF533[冶金工程—钢铁冶金]