某高磷鲕状铁矿石气基直接还原-磁选提铁降磷研究  

High⁃Phosphorus Oolitic Iron Ore Processed with Gas⁃based Direct Reduction and Magnetic Separation for Iron Increasing and Phosphorus Reduction

作　　者：延黎 黄武胜 吴世超 孙体昌[2] YAN Li;HUANG Wu-sheng;WU Shi-chao;SUN Ti-chang(Sinosteel Equipment Co Ltd,Beijing 100080,China;School of Civil and Resources Engineering,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]中钢设备有限公司,北京100080 [2]北京科技大学土木与资源工程学院,北京100083

出　　处：《矿冶工程》2021年第1期72-75,共4页Mining and Metallurgical Engineering

基　　金：国家自然科学基金(51874017)。

摘　　要：以国外某高磷鲕状铁矿石为原料,研究了气基直接还原-磁选生产粉末还原铁工艺。考察了CaCO_3用量、还原温度、还原气体组成、还原气体总流量以及还原时间对提铁降磷的影响。结果表明,该矿石通过气基直接还原提铁降磷是可行的,在CaCO_3用量25%、还原温度1 200℃、还原时间90 min、H_2与CO流量比3∶1、还原气体总流量5 L/min条件下,可获得铁品位、铁回收率以及磷含量分别为93.24%、92.83%以及0.085%的粉状还原铁。With a foreign high⁃phosphorus oolitic iron ore as raw material,a process of gas⁃based direct reduction followed by magnetic separation was adopted in the study for producing powdered reduced iron.The effects of CaCO3 dosage,reduction temperature,reducing gas compositions,total reducing gas flow,and reduction time on iron increasing and phosphorus reduction were investigated.The results show that it is feasible to reach the purpose of iron increasing and phosphorus reduction by using the process of gas⁃based direct reduction.It is shown that after the reduction process at 1200℃for 90 min,with the addition of CaCO3 at an amount of 25%,the flow ratio of H2 to CO at 3∶1 and the total flow of reducing gas at 5 L/min,a kind of reduced iron powder grading 93.24%Fe at 92.83%recovery,with phosphorus content of 0.085%,can be obtained.

关 键 词：高磷鲕状铁矿 气基直接还原 还原铁 提铁降磷 磁选 

分 类 号：TD925.7[矿业工程—选矿]