Research status and suggestion of mid-low temperature pyrolysis semi-coke as the PCI fuel in blast furnace
ZOU Chong
MA Cheng
ZHAO Junxue
WEN Liangying
BAI Chenguang
Abstract：In order to optimize the structure of blast furnace fuel and reduce the production cost,the research status of low temperature pyrolysis semi-coke as the fuel of blast furnace was discussed from the aspects of the basic properties,technological properties and injection effects.The main problems existed in the semi-coke instead of the coal powder were analyzed.The quality of status middle-low temperature pyrolysis semi-coke and most of the technical process met the requirements of the blast furnace,while the grindability and combustion performance of semi-coke fluctuated greatly.With the increase of semi-coke proportion,the combustion and grinding performance of mixed coal presented a declining trend.The quality could be improved by controlling the pyrolysis process of fuel and other co-pyrolysis and catalytic fuel,the ironmaking cost could be reduced by increasing the proportion of cheap fuel in the injection fuel.
Keywords：blast furnace injectionsemi-cokeproximate analysiscombustion performance
Publication Date：2017-01-01