粉煤制电石用半焦的黏结剂与黏结机理  

Binders and bonding mechanism of semi-coke preparation technique for carbide production with pulverized coal

作　　者：蔡志丹[1,2] 武建军[1,2] 周国莉[1,2] 商玉坤[1,2] 石鑫[1,2] 李国宁[1,2] 李霞[1,2] 胡雪莲[1,2] 

机构地区：[1]中国矿业大学国家煤加工与洁净化工程技术研究中心,江苏徐州221116 [2]中国矿业大学化工学院,江苏徐州221116

出　　处：《煤炭学报》2013年第8期1465-1470,共6页Journal of China Coal Society

基　　金：国家重点基础研究发展计划(973)资助项目(2012CB214902);国家自然科学基金资助项目(51104159)

摘　　要：为探索煤粉制电石用半焦的黏结剂与不同黏结剂的黏结机理,以及黏结剂对半焦冷、热强度的影响,以不黏煤为主要原料,添加黏结剂,将粉煤冷压成型后热解制得半焦。用热重(TG)和红外光谱(FTIR)的方法研究不同黏结剂的黏结机理,得到不同黏结机理下黏结剂对半焦冷、热强度的影响规律。结果表明:黏结剂A在高温下芳环上的烷基、芳香醚取代基脱落,形成较多的胶质体,黏结能力高;黏结剂B在低温下依靠分子间作用力和表面张力,高温下依靠羧基官能团水化反应形成胶质体,黏结能力高;黏结剂C在高温下芳环上的烷基、羟基官能团脱落,热解产生胶质体,黏结能力高。冷强度为98.66%,热强度为95.12%的半焦可以代替焦炭应用于生产电石。The major objective of this research is to explore binders and bonding mechanism of semi-coke preparation technique for carbide production with pulverized coal and the effect on the cold and thermal strength of semi-coke. The major objective of this research was to explore the non-caking coal as main material of producing formed semi-coke which was formed under a certain pressure at room temperature added with different binders. With the TG and FTIR methods, it was investigated that different binders had different bonding mechanism and binders had the influence on the cold and thermal strength of semi-coke. The results show that alkyl, aromatic ether in the aromatic ring of A binder falls off to form a lot of colloid and performance a high bonding ability under high temperature. Besides, B binder has possession of a high bonding ability to rely on molecular force and surface tension under low temperature and to depend on carboxyl hydration reaction forming colloid under high temperature. What＇ s more, C binder is a high bonding ability, because the alkyl, hydroxyl in the aromatic ring come off and form a lot of colloid under high temperature. The results show that the cold strength of semi-coke is over 98.66% as well as its thermal strength also surpasses 95. 12%. It has been proved that the semi-coke was qualified to be used in producinz carbide.

关 键 词：电石 半焦 黏结剂 黏结机理 冷 热强度 

分 类 号：TQ522[化学工程—煤化学工程]