Anshan Bayuquan Steel No.1 BF starts coke oven gas(COG)injection in 2010,and the first industrial test of in-jection of COG and pulverized coal mixture is carried out in the 4000m3 blast furnace.The test results reveal that:(1)the injection of COG can significantly reduce the consumption of solid fuel and reducing CO2 emissions:when COG injection a-mount accounts for 16.06-36.49 m3/t,the fuel rate drops by 11-18 kg/t;the replacement ratio of COG and solid fuel rea-ches 0.49-0.68 kg/m3 without considering other influencing factors,and the CO2 emission is reduced by 29-55 kg/t HM;(2)injection of COG can make hearth gas increasing,both the gas utilization rate and H2 content in the top gas increase more or less,but the theoretical combustion temperature before the tuyere decreases.(3)the COG shall be cleaned seconda-rily before injection to prevent the COG injection system fails to keep long time stable running due to clogging problem.
关键词
大型高炉/焦炉煤气喷吹/混合喷吹/理论燃烧温度/置换比
Key words
large-sized blast furnace/coke oven gas injection/hybrid injection/theoretical combustion temperature/re-placement ratio
万方数据