氧煤喷吹中高炉渣脱硫能力研究

Study on Desulfurization Ability of Blast Furnace at Oxygen coal Injection

以某厂喷煤粉高炉的同炉渣、铁为原料，参照现场的操作条件确定实验条件，模拟实验研究每吨铁喷煤量增至２００ｋｇ时，不同煤种、不同炉渣碱度和不同温度对生铁中硫含量的影响及其规律，并分析了不同煤种灰分成分对炉渣脱硫能力的影响．结果表明，每吨铁喷煤量增至２００ｋｇ时，炉渣碱度不应低于１．１，铁水温度不应低于１４３０℃，选择煤种和配比时，须注意混合煤粉灰分中ＣａＯ，ＭｇＯ含量高，ＳｉＯ２。

The effects of factors,such as coal slag basicity and temperature,on content of (S) in hot metal were studied. The slag and iron used in experiment were got from a certain factory. The conditions of experiment were similar to those of blast furnace operation with injection by 200 kg P.C/t Fe. The influence of different ash and component on desulfurization of slag have been analyzed. The results show that when the amount of coal injection increases to 200 kg/t Fe,the slag basicity should not be less than 1.1,the temperature of melted iron should not be below 1430℃,and when selecting coal and its mixture ratio,make sure that in the mixtured coal ash,the content of CaO,MgO should be high and the contents of SiO 2,Al 2O 3 should be low.