稀缺炼焦煤中煤再选潜势研究  

Study of the potentials for rewashing the middling product produced through primary scarce coking coal washing process

作　　者：夏灵勇[1] 魏立勇[1] 刘敏[2,3] 田立新[1] 桂夏辉[2] XIA Lingyong;WEI Liyong;LIU Min;TIAN Lixin;GUI Xiahui(Kailuan (Group) Limited Liability Corporation,Tangshan 063018 ,China;National Engineering Research Center of Coal Preparation and Purification ,China University of Mining and Technology ,Xuzhou 221116 ,China;School of Chemical Engineering & Technology,China University of Mining & Technology,Xuzhou 221116 ,China)

机构地区：[1]开滦(集团)有限责任公司,河北唐山063018 [2]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 [3]中国矿业大学化工学院,江苏徐州221116

出　　处：《选煤技术》2019年第1期18-23,共6页Coal Preparation Technology

基　　金：国家重点研发计划资助项目(2018YFC0604702);国家自然科学基金资助项目(51774286;51574236)

摘　　要：为了明确钱家营选煤厂稀缺炼焦煤中煤再选的可能性,对钱家营选煤厂三种中煤产品开展破碎、磨矿和浮选试验,分析了三种中煤的再选潜势。根据试验结果,并结合技术经济效益,研究发现:块中煤占中煤总量的6.97%,再选精煤质量合格,但分选难度大、加工成本高,仍需要进一步深入研究其工业规模的再选可能性;末中煤占中煤总量的60.47%,但常规解离后再选的精煤灰分难以达标,再选难度极大;浮选中煤占中煤总量的32.56%,通过解离再选试验可以释放出大量合格精煤,具有较好的再选价值。In order to explore the possibility of nlaking rewashing of the middling product of the scarce coking coal primary washing process at Qianjiay ing Coal Preparation Plant, flotation test is con ducted on 3 kinds of crushed and ground middling products for determining their respective rewashing potentials. Accord ing to the test result and tech no-economical analysis, it is found that: the coarse middling product which accounts for 6. 97% of the total is highly adaptable to rewashing in quality , yet the process is difficult and high in cost. So the possibility of making rewashing of the middling product on an industrial basis needs to be further investigated;for the small-size middling which makes up 60. 47% of the total, its rewashing process is extremely difficult because only through ordinary liberation process, the ash of rewashed clean coal can hardly meet the required standard;rewashing of the liberated flotation middling product, which shares 32. 56% of the total, can have a high yield of up-to-standard product, indicating that the middling has a high rewashing potential.

关 键 词：稀缺炼焦煤 解离再选 浮选 潜势分析 

分 类 号：TD943[矿业工程—选矿]