Impact of PCI Coal Quality on Blast Furnace （PCI高炉煤质量的影响）.pdf

Impact of PCI Coal Quality on Blast Furnace Operations P Bennett*, T Fukushima** *CoalTech Pty Ltd, **F-TeCon Pty Ltd Contact: pbennett@.au ABSTRACT Pulverized coal injection has assisted the steel industry to lower operating costs, extend coke oven life and lower greenhouse emissions. As the understanding of the impact of quality of the injected coal has increased, there has been a shift from high volatile thermal coals to low volatile semi-anthracites. A heat and mass model was used to investigate the impact of the injected coal properties on coke replacement ratio and operating costs under two sets of operating conditions corresponding to European and Japanese practices. The model was also used to investigate the impact of the injected coal ash content on the likely operating costs of a blast furnace. th 12 ICCS - November 2 003 Impact of PCI Coal Quality on BF Operations INTRODUCTION Blast furnace technology is central to the crude steel industry and is continually undergoing refinements to improve productivity and reduce operating costs. In the next two decades the blast furnace route for iron production will continue to contribute 50 to 60 % of world requirements. It will be the preferred route wherever the demand is large, scrap is not available, iron ore and coal are available and electric power is expensive. Continuous improvements in productivity, coke consumption and fuel use within the steelworks have been driven by competition in world steel markets. One such process refinement has been the injection of auxiliary fuels. Prior to the 1980s the preferred injection fuel was oil, but sharply increasing oil prices led to other fuels being used,