钢厂高炉Zn负荷控制与含铁尘泥利用研究  

Research on Zn load control and utilization of ferrous dust in blast furnace of steel plant

作　　者：马贵生[1] 夏秋雨 张树华[1] 康凌晨 Ma Guisheng;Xia Qiuyu;Zhang Shuhua;Kang Lingchen(Wuhan Iron and Steel Company Limited,Wuhan 430080,Hubei;Wuhan Branch,Academia Sinica,Baosteel,Wuhan 430080,Hubei)

机构地区：[1]武汉钢铁有限公司,湖北武汉430080 [2]宝钢股份中央研究院武汉分院,湖北武汉430080

出　　处：《烧结球团》2020年第5期77-82,共6页Sintering and Pelletizing

摘　　要：针对某钢厂厂内处置含铁尘泥致使高炉Zn负荷高且各个高炉Zn负荷差异大的问题,通过调整含铁尘泥使用路径、合理搭配等措施,将各高炉Zn负荷控制在相同水平。并通过对钢厂Zn平衡进行分析,探究高炉Zn负荷承受范围,将含Zn量高的含铁尘泥制备为球团直接在转炉使用,同时利用外部水泥厂协同处置利用的方式大幅度降低了高炉Zn负荷水平。结果表明:通过烧结工序合理配料,转炉工序适量承担,外部水泥厂协同处置利用等方式,将各高炉Zn负荷控制在0.25 kg/t左右水平,可以在稳定炉况的前提下有效利用含铁尘泥。同时,对目前含铁尘泥利用的几种方式进行分析与对比,提出各钢厂建设专用的含铁尘泥集中处置工艺设施才是解决Zn等有害元素循环富集的根本方法,从而实现含铁尘泥的"不出厂"高效利用。In view of such problems as the high Zn load of blast furnace caused by the disposal of ferrous dust in a steel plant and the Zn load with significant difference of each blast furnace,the Zn load of each blast furnace is controlled at the same level by adjusting such measures as the use path of ferrous dust,reasonable collocation,etc.Based on the analysis on the Zn balance in the steel plant,the Zn load tolerance range of each blast furnace is explored,the ferrous dust with high Zn content is prepared into pellets for direct use in the converter,while the co-processing and utilization method of external cement plants is used to greatly reduce the Zn load level of each blast furnace.The results show that the Zn load of each blast furnace can be controlled at about 0.25 kg/t by such means as reasonable ingredients in sintering process,appropriate burden in converter process,co-processing and utilization of external cement plants,etc.,and the ferrous dust can be effectively used under the premise of stable furnace conditions.At the same time,several ways of using ferrous dust are analyzed and compared,and it is proposed that the centralized disposal process facilities of ferrous dust special for steel plants construction are the fundamental method to solve the cyclic enrichment of such harmful elements as Zn,so as to achieve the efficient use of ferrous dust "without leaving the plant".

关 键 词：含铁尘泥 Zn负荷 转底炉 铁质矫正原料 

分 类 号：X705[环境科学与工程—环境工程] TF53[冶金工程—钢铁冶金]