热黏结剂对低阶煤制取型煤的热态性能影响  

STUDY ON INFLUENCE OF HEAT BINDER ON PROPERTIES OF BRIQUETTE FROM LOW RANK BITUMINOUS COALS UNDER HOT STATE

作　　者：黄山秀[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,河南焦作硕士助教454000

出　　处：《煤炭转化》2013年第2期74-78,共5页Coal Conversion

基　　金：河南理工大学博士基金资助项目(648216);河南理工大学重点学科基金资助项目(509929)

摘　　要：选用煤焦油沥青、高黏结肥煤作为热黏结剂,分别以不同的掺入量和低阶烟煤粉煤及其他原料混合制取型煤.型煤样品热强度测定结果表明:以煤焦油沥青为热黏结剂的型煤热强度高于以高黏结肥煤为热黏结剂的型煤热强度,进一步对型煤微观结构电镜分析也证实了以煤焦油沥青为热黏结剂的型煤其黏结性能和防水性相对较好,电镜切片表明,煤焦油沥青热态下析出的挥发分经过胶质体时产生的气泡相互作用能使胶质体受压形成更坚固的整体网状结构;研究还发现煤焦油沥青的粒度对型煤热强度也有一定的影响.Two different materials such as coal tar pitch, fat coal with high adhesion were chosen as the heat binder, which were mixed into the powder of low rank bituminous coals from Shenmu or Yuzhou and other raw materials to make coal briquette in different ration. The deter- mination results show that the thermal strength of coal briquette with tar pitch is higher than that of coal briquette with fat coal. Further analysis of micro-structure of coal briquette by electron microscopic also verifies that the cohesion and water resistance of coal briquette with tar pitch is stronger, and it is because that interaction of air bubble poduced by volatile separated under hot state through colloid pressures the colloid and form the stronger net-structure on coal granules surface. Moreover, the particle size of tar pitch also have certain effect on thermal strength of coal briquette.

关 键 词：低阶烟煤 型煤 热强度 热黏结剂 微观分析 沥青粒度 

分 类 号：TQ536[化学工程—煤化学工程]