振动梯级分选机细粒煤分选特性研究  

Research on Separation Characteristics of Fine Coal by Vibration Step Separator

作　　者：王自祥 张衡 张富豪 许钦赐 张芳芳 WANG Zixiang;ZHANG Heng;ZHANG Fuhao;XU Qinci;ZHANG Fangfang(Shandong Coal Science and Technology Research Institute Branch,Yankuang Energy Group Co.,Ltd.,Jinan 250014,China)

机构地区：[1]兖矿能源集团股份有限公司山东煤炭科技研究院分公司,济南250014

出　　处：《煤炭技术》2025年第4期274-278,共5页Coal Technology

摘　　要：为解决<6 mm粒级煤炭干法分选效果不理想的问题,以兖矿集团杨村煤为原料,采用偏心激振梯级分选机对<6 mm细粒煤进行分选试验,研究了细粒煤在振动梯级分选机中的分选机理,分析了不同结构参数、操作参数对振动梯级分选机中细粒煤颗粒的分选效果,结果表明:细粒煤在振动、气流复合力场作用下,颗粒群发生明显的入料铺展-快速扩散-梯度分级-煤矸分离过程;合理稳定的布风和工况参数调节能有效提高分选效果,在卸料倾角为5°、入料倾角为2°、振动电机频率为35 Hz、鼓风机频率为12 Hz最佳操作参数条件下,精煤产品的灰分和产率分别为9.26%和79.32%,排出矸石的灰分和产率分别为80.06%和20.68%,数量效率为94.8%,可能偏差E_(p)=0.15 g/cm^(3)。In order to solve the problem of unsatisfactory dry separation effect of<6 mm coal,with fine coal from the Yangcun coal mines of Yankuang group as raw material,the vibration step separator was used to separate<6 mm coal tests.The separation mechanism of fine coal in the vibration step separator,influence of separating effect made by the structural and operational parameters were experimentally studied.The results show that under the combined force field of vibration and airflow,fine-grained coal undergoes a significant process of feed spreading,rapid diffusion,gradient classification,and separation.Reasonable and stable air distribution and adjustment of operating parameters can effectively improve the separating effect.Under the optimal operating parameters of discharge inclination angle of 5°,feeding inclination angle of 2°,vibration motor frequency of 35 Hz,and blower frequency of 12 Hz,The ash content of clean coal products is 9.26%,with a yield of 79.32%.The ash content of gangue is 80.06%,with a yield of 20.68%.The quantity efficiency is 94.8%,and the possible deviation E_(p) value is 0.15 g/cm^(3).

关 键 词：干法选煤 细粒煤 振动梯级分选机 煤炭分选 提质 

分 类 号：TD94[矿业工程—选矿]