用添加有机结合剂和造孔剂的球团制备海绵铁

Direct Reduction Iron with Pellets Containing Organic Binder and Pore-forming Agent

以程潮铁矿铁精粉为原料,煤粉为还原剂,对添加有机结合剂和造孔剂的铁精粉球团的直接还原工艺进行了研究。结果表明,在铁精粉、造孔剂、有机结合剂质量比=20∶1∶5,煤与球团的配比1∶3,1250℃还原5h,可得到TFe含量为93%以上的海绵铁。该方法可以缩短还原时间,从原来的15h以上缩短到5h,大大降低能耗。

Process parameters of direct reduction of pellets containing organic binder and pore-forming agent,in which the refined iron ore was from Chengchao Iron Mine as well as the reducing agent was coal,has been investigated.The result shows that the appropriate weight ratio of refined iron ore,pore-forming agent and organic binder was 20∶1∶5.When reducing at 1 250 ℃ for 5 h as the weight ratio of coal and pellet was 1∶3,the total Fe of DRI was more than 93%.Because of the effect of pore-forming agent,the reducing time was reduced to 5h as to more than 15h other reference mentioned.Then the power cost could be decreased greatly.