临江羚羊铁矿石深度还原试验研究

针对原矿品位为34.79%的吉林临江羚羊铁矿石,进行了深度还原单因素条件试验;考察了还原温度、还原时间、料层厚度等因素对深度还原及磁选分离结果的影响.试验结果表明,还原温度、还原时间对深度还原过程的影响较大.在配煤过剩倍数2.0,还原煤粒度-1.5 mm和矿石粒度-2.0 mm的条件下,适宜的深度还原条件为还原温度1 275℃,还原时间50 min,料层厚度30 mm.在该试验条件下,获得了最终产品含铁质量分数93.05%,回收率85%,金属化率91.29%,达到我国炼钢用直接还原铁H92产品标准要求.

Deep Reduction Tests of Antelope Iron Ore in Linjiang Area

Deep reduction single factor condition tests on antelope iron ore with the grade of 34.79% from Linjiang area in Jilin Province were conducted,and effect of the factors such as reduction temperature,reduction time and thickness of feed layer on deep reduction and magnetic separation result was investigated.The results indicated that reduction process is considerably influenced by reduction temperature and reduction time.Optimal conditions are as follow: reduction temperature 1 275 ℃,reduction time 50 min,thickness of feed layer 30 mm,excess coal blending multiples 2.0,reduction coal particle size-1.5 mm,and ore particle size size-2.0 mm.Under these conditions,final product with content of Fe 93.05%,recovery 85% and metallization rate 91.29% is obtained,which meets the H92 standard requirement of direct reduction iron product of steelmaking field in China.