某高铁二次铜渣深度还原—磁选试验研究  

Experimental Research of Deep Reduction and Magnetic Separation Process of a High-iron Copper Slag

作　　者：王红玉[1] 李克庆[1] 倪文[1] 黄晓燕[1] 贾岩[1] 

机构地区：[1]北京科技大学土木与环境工程学院

出　　处：《金属矿山》2012年第11期141-144,共4页Metal Mine

基　　金：国家高技术研究发展计划(863计划)项目(编号:2012AA062406)

摘　　要：某二次铜渣铁含量较高,主要以铁橄榄石、磁铁矿等形式存在,难以用传统的选矿方法回收。采用深度还原—磁选工艺对该二次铜渣中铁回收的工艺技术条件进行了探讨,结果表明,在深度还原褐煤用量为20%、氧化钙用量为8.9%、还原温度为1 250℃、还原时间为3 h,还原产品磨矿细度为-0.074 mm占70%、弱磁选磁场强度为60.8 kA/m条件下,可获得铁品位为93.64%、回收率为88.08%的优质磁选铁粉,其杂质含量较低,可作为耐候钢的优质原料。The content of iron in a secondary copper slag is high, but it occurs mainly in form of fayalite,resulting in difficulty to be concentrated by using traditional processing. In the experiment, the technical conditions for the iron recovery from the secondary copper slag are discussed by the process of deep reduction-magnetic separation. The result shows that under the conditions of lignite 20% and calcium oxide 8.9% , the reduction temperature at 1 250 ~C for 3 h, the grinding fineness of - 0. 074 mm 70%, and the magnetic field intensity 60. 8 kA/m, high-quality magnetic iron powder with the grade of 93.64% and the recovery rate of 88. 08% is obtained. It contains low impurity and can be used as high-quality raw materials of weathering steel.

关 键 词：铜渣 深度还原 磁选 磁选铁粉 

分 类 号：TD951.1[矿业工程—选矿]