高炉喷煤直吹管内气粉两相流的流场  

Flow Field of Two-Phase Flow in Blowpipe of Blast Furnace with Pulverized Coal Injection

作　　者：周宗彦[1] 邹宗树[1] 王文忠[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110006

出　　处：《钢铁研究学报》2000年第B09期1-5,共5页Journal of Iron and Steel Research

摘　　要：在高炉富氧喷煤过程中 ,直吹管使喷入的煤粉与氧气预混、预热 ,并促使煤粉的热解和部分煤的燃烧。运用多相流的拟流体模型建立了高炉局部富氧喷煤直吹管内气粉两相流动的数学模型 ,对气粉两相流场进行了数值研究 ,探讨了气相和煤粉的速度分布规律及其影响因素 ,其中包括氧 -煤喷枪的结构、漩流数和富氧率等。结果表明 ,氧 -煤喷枪的漩流、富氧率等仅在氧枪出口的有限区域内对流场有较大的影响 ;喷煤对整个直吹管内的流场影响较小 ,但在氧 -煤喷枪出口附近区域会促使气相和煤粉激烈混合 。In the process of pulverized coal injection (PCI) into blast furnace, the blowpipe plays an important role in pre mixing the pulverized coal and oxygen, pre heating them and improving the pulverized coal pyrolization and combustion of the coal. On the basis of slip diffusion model of multiphase flow, a three dimensional mathematical model of gas particle flow in blowpipe has been developed and debugged to calculate the gas solid two phases flow, including gas velocity and particle velocity inside the blowpipe. The rotational jet and local oxygen enrichment can improve the mixing of oxygen and pulverized coal, but the effect of coal injection is weak on the whole flow field in blowpipe. The mass and momentum transfer near the exit of lance are very strong.

关 键 词：高炉 喷煤 直吹管 气粉两相流 流场 氧-煤喷枪 

分 类 号：TF538.6[冶金工程—钢铁冶金]