COREX喷煤燃烧利用的研究  

Research on the combustion and utilization of PCI for COREX

作　　者：曹希荣[1] 张丙怀[1] 阳海彬[1] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400044

出　　处：《钢铁研究》2009年第2期17-19,30,共4页Research on Iron and Steel

摘　　要：喷吹的煤粉主要在回旋区内燃烧,COREX熔融气化炉的氧口回旋区较小,而回旋区空腔内氧气浓度高,燃烧带的理论燃烧温度高。采用数学模型计算了煤粉在氧口回旋区内的燃烧率。研究表明:当煤粉平均粒度为0.075 mm,煤比不超过125 kg/t时,煤粉在回旋区内的燃烧率可达65%以上。未燃煤粉将参与气化反应、直接还原和渗碳反应等过程。从这个角度分析,COREX熔融气化炉可接受的未燃煤粉量约为75 kg/t;而在煤比为200 kg/t时,COREX可接受的煤粉的燃烧率为60%左右。Pulverized coal is burnt mainly in the raceway. Compared with blast furnace, the raceway of COREX melt-gasifier is smaller and the oxygen concentration is higher, resulting in higher theoretical combustion temperature. The combustion efficiency of pulverized coal in the raceway was studied using a mathematical model. According to the research, the combustion efficiency could keep at the level of 65 % when the mean size of particle was 0. 075 mm and the coal ratio was under 125 kg/t. Non-combustion coal would undergo gasification reaction, direct reduction, carburization and so on. From this perspective, the acceptable quantity of non-combustion coal for COREX meltgasifier was about 75 kg/t. When the coal ratio was 200 kg/t, the combustion efficiency of COREX process could be about 60 %.

关 键 词：COREX熔融气化炉 回旋区 燃烧率 数学模型 

分 类 号：TF531[冶金工程—钢铁冶金]