神东烟煤水分对其高炉喷吹性能的影响

Effect of moisture of Shendong bituminous coal on its blast furnace injection performance

神东烟煤具有水分含量高的特征,这对其生产、运输、储存或用于高炉喷吹都会有影响。针对神东烟煤的这个特性,选用5种不同矿区的具有代表性的高水分神东烟煤,探究不同干燥时间条件下水分对其可磨性的影响,并使用高炉喷煤燃烧模拟试验装置研究其燃烧率随水分含量的变化趋势,将不同条件下的失水质量分数与分析水质量分数的比值定义为失水率,探究可磨性和燃烧率与失水率的变化关系。结果表明,失水率增大时,煤的可磨性和燃烧率均呈上升的趋势,随着干燥时间的延长,可磨性增大的趋势变缓,随着失水的增多,燃烧率和失水率近似呈线性增长的关系。

Shendong bituminous coal has the characteristics of high moisture content,which has different effects on its production,transportation,storage or application in blast furnace injection.In view of this characteristic of Shendong bituminous coal,five representative high-water Shendong bituminous coal from different mining areas were selected to explore the effects of moisture on its grindability under the condition of different drying time,and the blast furnace coal injection simulation test device was used to study the variation trend of the combustion rate with the moisture content.The water loss mass fraction under different conditions to the analytical moisture content was defined as the water loss rate to explore the relationship between grindability and burning rate relates and the water loss rate.It could be concluded that when the water loss rate increased,the coal grindability and combustion rate both showed an upward trend.With the increase of drying time,the grindability increased slowly.With the increase of water loss,the combustion rate and combustion rate showed an approximately linear growth.