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为了提高邯钢高炉喷吹煤比,模拟煤粉在高炉内的热解。以邯钢喷吹用长治煤(以下简称CL)和大湾煤(以下简称DW)为原料,采用等离子体进行快速热解,计算反应后煤粉的分解率,利用气相色谱仪对气体产物进行分析以及用扫描电镜(SEM)观察反应产物的形貌特征。试验结果表明,CL和DW的分解率分别为43.10%和52.04%,气相产物主要为CO、H2、CH4、C2H2及少量C2H4等气体,热解产物的粒径减小,形貌发生明显变化。在CL煤的基础上配加不同比例的DW后,煤粉颗粒出现了孔状结构,因此可以提高炉内风口回旋区固定碳颗粒的燃烧率,为提高煤粉燃烧率提供理论依据。
In order to improve the coal injection rate of Handan Iron and Steel blast furnace pulverized coal pyrolysis in the blast furnace simulation. Using the Changzhi coal (hereinafter referred to as CL) and Taiwan coal (hereinafter referred to as DW) as the raw materials for the blow-out of Handan Iron and Steel Co., Ltd., rapid pyrolysis was performed by plasma to calculate the decomposition rate of the pulverized coal after the reaction. The gas product was subjected to gas chromatograph The morphology of the reaction product was observed and analyzed by scanning electron microscopy (SEM). The experimental results showed that the decomposition rates of CL and DW were 43.10% and 52.04%, respectively. The main products of the gas phase were CO, H2, CH4, C2H2 and a small amount of C2H4. The particle size of pyrolysis products decreased and the morphology changed significantly. After adding different proportions of DW on the basis of CL coal, the pulverized coal particles have a hole structure, thereby improving the combustion rate of the fixed carbon particles in the tuyere raceway in the furnace and providing a theoretical basis for increasing the combustion rate of the pulverized coal.