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福山钢铁厂继5号高炉于1990年3月喷吹煤粉之后,4号高炉也建设了喷煤设施。该装置1994年3月投入运行,1周后煤比即达100kg/t铁。此后喷煤量逐步增长,半年后,即1994年10月,为探索极限喷吹量,进行了大喷煤量试验,创造了月平均煤比218ks/t铁的记录。大喷吹煤的首要条件是高炉能接受喷入的煤粉,亦即尽可能使喷入的煤粉在风口循环区内充分燃烧,而未燃尽煤粉通过熔损反应加以消化吸收,否则将导致透气性变差而恶化炉况。为此,在燃烧实验装置上进行了喷
Fukuyama Iron & Steel Plant Following the No. 5 blast furnace pulverized coal injection in March 1990, No. 4 blast furnace also constructed a coal injection facility. The plant was put into operation in March 1994, after 1 week the coal ratio reached 100kg / t iron. Since then, the amount of coal injected has gradually increased. After half a year, that is, in October 1994, a large coal injection test was conducted to explore the ultimate injection volume, creating a record of 218ks / t of iron per month. The main requirement of large PCI coal blast furnace can accept the injection of pulverized coal, that is, as far as possible so that the injection of pulverized coal in the tuyere circulation area full combustion, and unburnt pulverized coal melt loss reaction to be digested and absorbed, or Will result in deterioration of permeability and deterioration of furnace conditions. For this purpose, a jet test was carried out on a combustion test apparatus