鄂西某高磷鲕状赤铁矿磁化焙烧及浸出除磷试验  

Research on Magnetic Roasting and Leaching Dephosphorization of High-phosphorus Oolitie Hematite in Western Hubei

作　　者：李育彪[1] 龚文琪[1] 辛桢凯[1] 皮科武[1] 胡纯[1] 

机构地区：[1]武汉理工大学

出　　处：《金属矿山》2010年第5期64-67,共4页Metal Mine

基　　金："十一五"国家科技支撑计划项目(编号:2007BAB15B01);国家重点基础研究发展计划(973计划)项目(编号:2004CB619204)

摘　　要：针对鄂西某高磷鲕状赤铁矿(铁品位43.50%),在实验室条件下采用磁化焙烧—磁选工艺获取铁精矿,并对该铁精矿进行酸浸、生物浸出除磷试验。研究结果表明,在焙烧温度850℃,焙烧时间25min,还原剂用量为矿石质量的5%,磨矿时间4min,磁场强度120kA/m条件下,得到铁精矿铁品位为54.92%,铁回收率为86.78%,P含量为0.83%;酸浸试验中矿浆浓度2%,分别用0.1mol/L的H2SO4,HNO3,HCl,草酸(C2H2O4),柠檬酸(C6H8O7)除磷,其中H2SO4除磷提铁效果最佳,铁精矿品位为57.98%,回收率为96.47%,除磷率为95.30%;生物浸出试验中矿浆浓度2%,用嗜酸氧化亚铁硫杆菌(At.f菌)对铁精矿作用后,磷含量为0.23%,用黑曲霉菌滤液对铁精矿作用后,磷含量为0.20%。Roasting-magnetic separation was used to treat a high-phosphorus oolitic hematite in western Hubei（iron grade at 43.50%）,dephosphorization methods,including acid leaching and bioleaching,were used for the iron concentrate.The results showed that,under the condition of roasting at 850 ℃ for 25 min,reductant to ore ratio of 5%,grinding time of 4min,magnetic field strength 120 kA/m,the iron concentrate grade was 54.92%,iron recovery rate was 86.78%,with P 0.83%;in the acid leaching test,pulp density was 2%,with 0.1 mol /L of H2SO4,HNO3,HCl,C2H2O4,C6H8O7 for phosphorus removal,in which H2SO4 was the most effective,and the iron grade,recovery rate,phosphorus removal rate were 57.98%,96.47%,95.30%,respectively;in the bioleaching test,pulp density was 2%,with the filtrate of the Acidophilic Thiobacillus ferrooxidans（At.f）and the Aspergillus niger on iron concentrate ore,the phosphorus content were 0.23%,0.20%,respectively.

关 键 词：鲕状赤铁矿 高磷铁矿石 磁化焙烧 酸浸 生物浸出 除磷 

分 类 号：TQ624[化学工程—精细化工]