高磷鲕状赤铁矿直接还原同步脱磷研究  

Study of Direct Reduction and Synchronous Dephosphorization for High-phosphorus Oolitic Hematite

作　　者：李永利[1] 孙体昌[1] 杨慧芬[1] 徐承焱[1] 杨大伟[1] 祁超英[2] 李志祥[2] 

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 [2]武汉钢铁集团矿业有限责任公司,湖北武汉430080

出　　处：《矿冶工程》2011年第2期68-70,共3页Mining and Metallurgical Engineering

基　　金：国家自然科学基金资助项目(51074016)

摘　　要：对含铁品位为43.58%、含磷0.83%的鄂西某宁乡式高磷鲕状赤铁矿进行了直接还原焙烧脱磷试验研究。研究了焙烧温度、还原剂用量、焙烧时间、脱磷剂用量对直接还原铁指标的影响。在还原剂用量17.5%,TS用量50%,NCP用量2.5%,焙烧时间60 min,一段磨矿粒度为-0.074 mm粒级占89.56%,磁选磁场强度为87.58 kA/m;二段磨矿粒度为-0.025 mm粒级占100%,磁选磁场强度为87.58 kA/m时可得到铁品位91.58%,回收率84.96%,磷品位0.049%的直接还原铁磁选精矿。Experimental studies on direct reduction roasting and synchronous dephosphorizaton were conducted for some Ningxiang type high-phosphorus oolitic hematite with iron content of 43.58%,phosphorus content of 0.83% in west of Hubei Province.The effects of roasting temperature,the reductant dosage,roasting time and dephosphorizer dosage on the index of DRI（Direct Reduced Iron） were investigated.Iron concentrates with iron grade of 91.58%,recovery of 84.96% and phosphorus grade of 0.049% can be obtained through direct reduction roasting and magnetic separation under conditions as follows： reductant dosage of 17.5%,TS dosage of 50%,NCP dosage of 2.5%,roasting time of 60 min,first-stage grinding size of 89.56%-0.074 mm with magnetic field intensity of 87.58 kA/m,second-stage grinding size of 100%-0.025 mm with magnetic field intensity of 87.58 kA/m.

关 键 词：高磷鲕状赤铁矿 直接还原焙烧 脱磷剂 磁选 铁矿选矿 

分 类 号：TF111[冶金工程—冶金物理化学]