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对4种高炉喷吹用煤(晋城北、冬田良、青州和邯郸)进行了煤岩显微分析和工业分析,并且对各单煤的可磨性指数进行了测定,研究了磨煤温度对不同煤化程度单煤的哈氏可磨性指数的影响以及不同煤种混合煤的可磨性。试验结果表明,4种煤中冬田良煤含硫量以及青州和邯郸2种煤的灰分略高于指标要求,其他指标均可以满足喷吹用煤的指标要求;不同煤种单煤的可磨性指数相差较大,晋城北无烟煤的可磨性指数最低,不符合喷吹指标,需进行配煤提高其可磨性;随着磨煤温度的升高,不同煤化程度单煤的可磨性指数均有一些增加,对煤化程度较高的无烟煤的影响较小;不同煤种混合后煤样的可磨性指数并不等于各单一煤种的可磨性指数的加权平均值。
Coal and rock micro-analysis and industrial analysis were conducted on four kinds of blast furnace coal (Jinchengbei, Dongtianliang, Qingzhou and Handan), and the grindability index of each single coal was measured. The effects of grinding temperature The impact on the harshness index of single coal with different degree of coalification and the grindability of coal with different coal types. The test results show that the content of sulfur in winter coal and the ash content of two kinds of coal in Qingtian and Handan are slightly higher than the index requirements for the four kinds of coal. Other indexes can meet the index requirements of blowing coal; The difference of grindability index is larger, the grindability index of Jincheng northern anthracite is the lowest, it does not meet the injection index, and coal blending is needed to improve its grindability. With the increase of temperature of coal grinding, the grindability of single coal with different degree of coalification However, the index of grindability of coal samples mixed with different coal types is not equal to the weighted average of grindability index of each single coal type.