School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing)

为改善空气重介质流化床分选机分选效果,采用反倾角振动方式替代原刮板输送方式排出重产物,研制了新型空气重介质流化床分选机并建立了半工业性试验系统,考察了风量、入料粒度、单元处理量、入料可选性对分选效果的影响。结果表明,新型空气重介质干法分选机可对粒度80~6 mm的入选煤进行有效分选,随着入料粒度的增大,分选效果变好,分选室最大单位处理量为7 t/(h·m2);在合适的风量以及振动参数下,对可选性为易选的不黏煤可能偏差Ep为0.05 g/cm3,对可选性属难选的褐煤可能偏差Ep为0.07 g/cm3,实现了对不同可选性煤炭的高精度分选。

In order to improve the separation effect of air-dense medium fluidized bed separator, a new-style air-dense medium fluidized bed separator was develop ed which used anti-dip vibration instead of scraper to discharge gangue, semi-industrial test system was set up and the influence of air volume, feed size, unit handling capacity and feed washability on the separation effect was studied. The results showed that coal with the particle size of 80 ~ 6 mm could be effectively separated by se parator, and the separation efficiency became better with the increase of particle size. The largest unit handling capacity of separator was 7 t/ (h.m2) . Under suitable ai r volume and vibration parameters, easy-to-wash coal could be separated with probable error Epof 0. 05 g/cm3, and difficult-to-wash coal could be separated with proba ble error Epof 0.07 g/cm3, which indicated that a high-precision separation for coal with different washability was achieved.

国家自然科学基金资助项目(51174214)；国家重点基础研究发展计划(973计划)资助项目(2012CB214904)；“十二五”国家科技支撑计划资助项目(2012BAA04B02)；高等学校博士学科点专项科研基金资助项目(20120023110017)；