高可磨指数煤种引起中速磨机排渣口吐料原因探究  

Investigation of the causes of spitting at the discharge port of medium speed mill caused by high HGI coal types

作　　者：王宇哲[1] 邹冲[2] 郑雅青[1] 白中辉 俞楠 Wang Yuzhe;Zou Chong;Zheng Yaqing;Bai Zhonghui;Yu Nan(Beijing Shougang Co.,Ltd.;Xi'an University of Architecture and Technology)

机构地区：[1]北京首钢股份有限公司 [2]西安建筑科技大学冶金工程学院

出　　处：《冶金能源》2023年第3期13-17,共5页Energy For Metallurgical Industry

基　　金：陕西省自然科学基金项目(2022JQ-541);陕西省教育厅服务地方专项计划项目(22JC042)。

摘　　要：文章研究了高炉制粉车间在使用哈氏可磨指数为100左右的煤种时出现中速磨机排渣口吐料问题。通过对该煤种的哈氏可磨指数、工业分析、制粉产物形态、岩相分析等结果的研究发现,不同批次煤样的变质程度改变造成了煤体硬度的差异。在相同的哈氏可磨指数和工业分析条件下,因高可磨性煤硬度低,在受到垂直方向碾压后易形成饼状形态并在辊缝之间难以翻转,在进一步粉碎过程中又因表面结构差异产生“黏磨”现象,进而造成中速磨机间断性排渣。The problem of spitting at the discharge port of a medium-speed mill when using a coal with a HGI of about 100 was studied in a blast furnace pulverizing plant.Through the study of the HGI,industrial analysis,pulverized product morphology and petrology analysis of this coal,it is found that under the same HGI and industrial analysis conditions,the change in the degree of metamorphism of different batches of coal samples causes the difference in coal hardness.In the process of further crushing,“sticky grinding”phenomenon occurs due to the difference of surface structure,which causes intermittent slag discharge from medium speed mill.

关 键 词：高炉喷煤 哈氏可磨指数 显微组分 镜质组反射率 

分 类 号：TF321[冶金工程—冶金机械及自动化]