宝钢炼钢尘泥再生利用的工艺试验研究

Research on Recycling Technology of Steelmaking Dust and Mud at Baosteel

对宝钢炼钢尘泥进行了试验研究,结果表明:炼钢尘泥都是微粉级的,甚至含有不少亚微米颗粒;在1200℃,3h的情况下,几乎所有粉尘铁的还原率达到了73%以上,还原后粉尘的锌和钾、钠几乎为零,加碳没有显著提高还原率;铁还原反应的传质途径主要是通过气相实现的;对于含促进剂A的尘泥,1200℃,1h就可以把锌、碱金属和铅全部还原蒸发出来,铁的还原率达到90%以上。

The experiment results on steelmaking dust and mud at Baosteel show steelmaking dust and mud are fine powder, and some of them are even sub-micron particles. Processed at 1 200℃ for 3 hours, iron reduction ratio of all dust and mud is over 73% ,and there are almost no metals such as zinc, kalium,natrium, etc. in it. Carbon addition doesn＇ t obviously improve iron reduction ratio. Iron redox is mainly carried out through the gas phase. When accelerant A is added, zinc, alkaline metals and lead can be reduced and evaporated out from the dust and mud at 1 200℃ for 1 hour, and iron reduction ratio can be over 90%.