高碳粉煤灰微波还原钢渣实验研究  

Experimental Research on Microwave Reduction of Slag by High-Carbon Fly-Ash

作　　者：卫智毅 陈宇红[1] 蒋亮[1] 张丽丽[1] 韩凤兰[1] 杨奇星[1] 

机构地区：[1]北方民族大学材料科学与工程学院,银川750021

出　　处：《硅酸盐通报》2016年第4期1062-1066,共5页Bulletin of the Chinese Ceramic Society

基　　金：宁夏自治区科技攻关项目国际合作专项(NXIC2013ZYH181);国家科技支撑计划课题中小企业发展专项资金(SQ1013ZOG300003);北方民族大学研究生创新项目(YCX1544)

摘　　要：本文在以废治废理念指导下开发出一种钢渣还原回收利用的新途径。采用微波技术以高碳粉煤灰为还原剂对转炉钢渣进行还原,对原料的升温特性、还原效果和产物磁选分离情况进行了研究。粉煤灰和钢渣都具有很好的吸波性能,在1.5 k W微波功率条件下升温速率分别达到213℃/min和75℃/min。铁的金属化率随加热温度的升高而增大,当温度超过850℃时趋于平缓,达到86.3%。采用湿式弱磁选对反应产物进行分离,在0.074 T磁场强度条件下,得到铁品位为64.8%的铁精矿,对应于钢渣中铁的回收率约为52.7%,是原钢渣直接磁选回收率的2.32倍。A new route to recycling the basic oxygen furnace（ BOF） slag was developed under the concept of treating waste with waste. The BOF slag was reduced in microwave by using a high-carbon fly-ash as the reductive agent. The heating characteristics of the raw materials,the reduction reactions and the magnetic separation efficiency of the reaction products were investigated. The results indicated that both of the fly-ash and the BOF slag in the raw materials had high microwave absorption to reach a heating rate of 213 ℃ and 75 ℃ per min in a 1. 5 k W microwave,respectively. The iron metallization rate increased with the temperature in the first stage and then leveled off when the temperatures were 850 ℃,to reach a maximum iron metallization rate up to 86. 3%. After separation by a 0. 074 T magnetic field,content of the metallic iron was 64. 8wt%,corresponding to 52. 7wt% of the total iron content in the slag. This iron recycling rate was 2. 32 times as the iron recycling iron rate by direct magnetic separation of the slag.

关 键 词：微波 还原 粉煤灰 转炉钢渣 磁选 

分 类 号：TQ175[化学工程—硅酸盐工业]