低阶烟煤制取型煤的成型机理研究  

STUDY ON BRIQUETTE'S MECHANISM IN BRIQUETTE OF LOW RANK BITUMINOUS COALS

作　　者：黄山秀[1] 黄光许[1] 张传祥[1] 马名杰[1] 

机构地区：[1]河南理工大学材料科学与工程学院,河南焦作硕士生454000

出　　处：《煤炭转化》2010年第4期52-55,共4页Coal Conversion

基　　金：河南理工大学博士基金资助项目(648216);河南理工大学青年基金资助项目(Q2008-10)

摘　　要：选用水玻璃、膨润土和赤泥三种无机黏结剂,分别以四种不同的掺入量和低阶烟煤粉煤混合制取型煤.对型煤样品进行抗压强度的测定表明,型煤抗压强度随黏结剂掺比增大而增大,其中以膨润土为黏结剂的型煤强度远高于以水玻璃和赤泥为黏结剂的型煤强度,进一步的型煤微观结构电镜分析也证实了以膨润土为黏结剂的型煤其黏结性能相对最好,电镜切片表明,膨润土以朵状凝胶体楔入煤粒孔隙中并在煤粒表面形成整体网状结构.由于低阶烟煤自身的性质,以其制取的型煤往往对成型压力比较敏感,实验表明型煤的冷强度随成型压力的增大先增大后减小,存在一个最优成型压力.Three different materials such as sodium silicate,bentonite,red mud were chosen as the inorganic binder,which were mixed into the powder of low rank bituminous coals from Shenmu or Yuzhou to make coal briquette in four ration.The results of coal strength determination show that the cold strength is increased with the binder ration,thereinto,the cold strength of coal briquette with bentonite is far higher than that of these briquette with sodium silicate or red mud.Further analysis of micro-structure of coal briquette by electron microscopic also verifies that the cohesion of coal briquette with bentonite is strongest,and it is because that bentonite by form of flower-shaped gels wedges the hole of coal granules and form the net-structure on coal granules surface.Owing to the property of low rank bituminous coal,the coal briquette made of the coal is always sensitive to the forming pressure.The cold strength of coal briquette increases with the forming pressure at first,and 20 kN is the optimum pressure,then it decreases.

关 键 词：低阶烟煤 型煤 无机黏结剂 微观分析 成型压力 

分 类 号：TQ536[化学工程—煤化学工程]