含硼铁精矿选择性还原-选分新工艺的实验研究  

Experimental Study on New Process for Selective Reduction and Separation of Boron-Bearing Iron Concentrate

作　　者：付小佼[1] 于洪翔[1] 柳政根[1] 储满生[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2013年第7期966-970,共5页Journal of Northeastern University(Natural Science)

基　　金：教育部高等学校博士学科点专项科研基金资助项目(20100042110004);中央高校基本科研业务费专项资金资助项目(N090502004)

摘　　要：针对现有含硼铁精矿硼铁分离工艺所存在的弊端,提出了含硼铁精矿选择性还原-选分新工艺,并通过热力学分析和实验室研究进行了验证.研究表明:对于辽宁凤城Fe和B2O3质量分数分别为56.05%和3.86%的含硼铁精矿,最佳的选择性还原-选分工艺参数如下:配碳比0.8～1.0,还原温度1 275～1 300℃,还原时间不小于20 min,还原煤粒度为-0.075 mm,分选时的磁场强度为50 mT.得到的选分产物为高金属化率的金属铁粉,可进一步处理用于钢铁生产;选分尾矿为高品位的含硼资源,可作为硼工业的优质原料.In view of disadvantages of present boron and iron separation technology,a new process for selective reduction and separation of the boron-bearing iron concentrate was proposed,which was verified by the thermodynamic feasibility analysis and laboratory tests.The laboratory experiments indicated that for the boron-bearing iron concentrate in Fengcheng city of Liaoning province with Fe and B2O3 mass fraction of 56.05% and 3.86%,respectively,the optimized parameters of selective reduction and separation were as followed： the carbon ratio 0.8~ 1.0,the reduction temperature 1 275~1 300 ℃,the reduction time no less than 20 min,the particle size of coal about 0.075 mm and the magnetic field strength of the separation 50 mT.The selected product was the iron powder with high metallization,which could be used in steel production through further processing.The tailings of separation were high grade sources containing boron,which could be used as the superior raw material in boron industry.

关 键 词：含硼铁精矿 选择性还原 选分 磁场 硼铁分离 

分 类 号：TF046.6[冶金工程—冶金物理化学]