不同烟煤还原红土镍矿的研究  

Effects of Different Bitumite on Reduction of Nickel Laterite

作　　者：胡志强[1] 贾彦忠[1] 梁德兰[1] 张传炳 赵嵩[1] 陈奎元[1] 

机构地区：[1]北京科技大学,北京100083

出　　处：《矿冶工程》2015年第2期120-123,共4页Mining and Metallurgical Engineering

摘　　要：以含Ni1.83%,Fe15.25%的红土镍矿为研究对象,采用3种烟煤为还原剂,进行了红土镍矿回转窑焙烧预还原实验,研究了煤种、用量及粒度对镍矿预还原的影响。结果表明:增加烟煤用量可以提高镍、铁预还原率;固定碳相同的烟煤,挥发分越高,镍矿还原效果越好;增大烟煤粒度,镍、铁的预还原率呈下降趋势,但对于挥发分较高的烟煤,适当增加大粒度比例,可以促进镍矿的预还原。确定了最佳工艺条件为:以烟煤C为还原剂,烟煤粒度-10mm,镍矿/烟煤质量比为100∶5,此条件下,铁金属化率和镍预还原率分别为4.53%和80.64%。With three kinds of bitumite as reductant, experimental study was conducted on the roasting and prereduction of nickel laterite in a rotary kiln, and the effects of varieties, addition and particle size of bitumite on the prereduction process were investigated. Results showed that, the addition of bitumite can increase the pre-reduction rate nickel and iron, as for the bitumite with the same fixed carbon, the higher volatility can result in a better reducti efficiency, and a larger particle size of bitumite can lead to a downward trend in the reduction rate of nickel and ir~ However, as for the bitumite with high volatility, properly increasing the proportion of larger sized bitumite seems to beneficial to the pre-reduction. Therefore, under the determined optimum conditions for reduction with bitumite C reductant at the particle size of - 10 mm, the mass ratio of nickel laterite to bitumite at 100 ： 5, the metallization of ir and reduction rate of nickel reached 4.53% and 80.64%, respectively.

关 键 词：红土镍矿 还原焙烧 烟煤 镍 预还原 

分 类 号：TF046[冶金工程—冶金物理化学]