干馏温度对高炉喷吹用半焦可磨性能的影响研究  

Effects of pyrolysis temperature on grindability of char using pulverized coal injection in Blast furnace

作　　者：邹冲[1] 李宝[1] 赵俊学[1] 李小明[1] 

机构地区：[1]西安建筑科技大学冶金工程学院,陕西西安710055

出　　处：《洁净煤技术》2016年第1期71-76,共6页Clean Coal Technology

基　　金：国家自然科学基金资助项目(51374166)

摘　　要：为了研究干馏温度对高炉喷吹用低温干馏半焦可磨性能的影响,采用哈氏可磨性指数测定仪研究了3种原煤在不同干馏温度下制得半焦的可磨性,并采用激光粒度分析仪考查了半焦的破碎特征。研究表明,半焦的可磨性指数随着干馏温度的提高,呈现先升高后降低的趋势,低温干馏半焦的最大可磨性指数对应的最佳干馏温度为540℃;煤的可磨性预测方程不能预测半焦的可磨性;半焦的破碎过程以体积破碎为主,也进行表面破碎,干馏温度对半焦的破碎特征影响较大,半焦破碎后的粒度大小与可磨性存在对应关系。在煤低温干馏的规模化生产过程中,可以通过适当降低现有干馏操作条件优化半焦的可磨性能,以利于低温干馏半焦在高炉喷吹中的应用。In order to investigate the effects of pyrolysis temperature on grindability of char,Hardgrove grindability index（ HGI） of different char prepared from three kinds of coal was tested by HGI apparatus,and the crushing feature of chars was investigated by laser particle size analyzed. The results showed that the grindability of char increased first then decreased with the increase of pyrolysis temperature. The pyrolysis temperature corresponding to the highest value of HGI was 540 ℃. The grindbility of char couldn＇t be predicted by the prediction equations of coal. The pulverization pathway of char was volume crushing-based,followed by surface crushing. The pyrolysis temperature played a critical role in char crushing process,and there should be corresponding relationships between the level of particle size and grindability. During the low temperature pyrolysis technology,the grindability of char for using PCI could be improved by properly decreasing the pyrolysis temperature in the scale production of lower temperature pyrolysis of coal.

关 键 词：半焦 低温干馏 干馏温度 可磨性 粒度分布 

分 类 号：TQ534[化学工程—煤化学工程]