3块煤成焦的试验结果和分析-有色金属科学与工程.doc

PAGE 9 ???????????????????????????? 收稿日期：2013- 基金项目：国家自然科学基金“钢铁联合研究基金”；国家高技术研究发展(863)计划资助项目(2009AA06Z105) 作者简介：刘肖(1990-)，男，硕士研究生，主要进行焦炭、半焦反应性方面的研究，E-mail: 364510651@ 通讯作者：吴铿(1951-)，男，教授，博士生导师，E-mail： HYPERLINK mailto:wukeng@ wukeng@ 熔融气化炉内块煤成焦后粉化现象的相关研究 王文泽刘肖，刘起航，湛文龙，梁磊，任海亮，吴铿， (北京科技大学钢铁冶金新技术国家重点实验室，北京 100083) 摘要：采用200 kg级炼焦炉通过对熔融气化炉主要使用的两种块煤，A煤和B煤，在200 kg炼焦炉进行了不同时间的半焦裂解试验，比较研究了两种块煤成焦后的粒度分布和强度变化，发现B煤在炼焦炉内的粉化严重，随结焦时间的延长其粒度降解度随结焦时间的延长一直在升高，而A煤在降解度在达到最大值后，随着时间增加开始下降。对比了两种块煤在炼焦炉内生成半焦的矿相微观结构，A煤生成的半焦主要以镶嵌结构和各向同性结构为主，而B煤生成的半焦主要以类丝炭和各向同性结构为主；两种块煤形成的半焦均含有未成焦的煤。熔融气化炉内的条件与炼焦炉相差较大，对块煤形成半焦的影响因素更多，但仅影响块煤生成半焦不同结构的数量，不会影响其不同结构的种类。通过对分析熔融气化炉内取出的风口试样中不同粒度的含碳物质其的矿相微观结构分析，认为在炉缸内6.3 mm的颗粒是由两种块煤裂解成焦后的粉化现象所引起，且其中B煤的粉化是主要的因素。 关键词：熔融气化炉；块煤成焦和粉化；矿相微观结构；风口试样 中图分类号：TF557 Investigation on Pulverization pulverization Phenomena phenomena of Coke coke Formed formed by Lump lump Coal coal Pyrolysis pyrolysis in Melter melter Gasifiergasifier LIU XiaoWANG Wen-ze, LIU Qi-hang, ZHAN Wen-long, LIANG Lei, REN Hai-liang, WU Keng (State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083) Abstract：Through the different pyrolysis time tests in 200 kg coke oven of lump coal mainly used in melter gasifier, namely A coal and B coal, the size distribution and strength change of the two coals after coking was compared. Results showed that the pulverization of B coal in coke oven was severe, which size degradation rate (DR) was always increasing with the coking time prolonging. On the contrary, the DR of A coal was decreasing once reached the maximum value. The mineral microstructure of semi coke formed by the two coal pyrolysis in coke oven was also compared. It was found that semi coke formed by A coal was mainly mosaic and isotropy stucture, and the other semi coke formed by B coal was mainly fusain and isotropy structure. There was still some coal residue in both semi cokes. The conditions were much different between melter gasifier and cok