Department of Mining and Design, Tiandi Science and Technology Company Limited China Mining Industry
International Engineering Design and Research Institute Company Limited

针对块煤重介质分选机、末煤重介质旋流器选煤工艺存在系统复杂,管理难度大的缺陷,提出了一种基于块煤与末煤重介质回收系统共用的选煤工艺,块矸石及块精煤都进入末煤脱介系统,通过调整补水量以及合格介质的分流量,实现块煤和末煤系统分选密度的独立调控。将该工艺应用于新窑选煤厂的设计及生产,结果表明:块精煤和末精煤灰分均为5%~6%,水分分别为12%和15%,分选系统运行稳定;同时省去了块精煤脱介筛、块矸石脱介筛以及稀介质桶,降低了投资;块煤与末煤重介质回收系统共用的选煤工艺对动力煤分选具有良好的适应性,可为其在炼焦煤选煤厂推广提供依据。

According to system complicated and high difficult management existed in the lump coal heavy medium separator and the fine coal heavy medium cyclon e preparation technique, coal preparation technique was provided based on heavy medium recovery system jointly applied to lump coal and fine coal. The lump refuse a nd clean lump coal would both run into fine heavy medium removing system and with an adjustment of water refilling quantity and bypass flow quantity of qualified medi um, an independent adjustment on the separation density of the lump coal and fine coal system could be realized. The technique was applied to the design and producti on of Xinyao Coal Preparation Plant. The results showed that ash content of the cleaned lump coal and cleaned fine coal both was 5% ~ 6%, moisture content was 12% and 1 5% individually and the separation system was stable in operation. Meanwhile, heavy medium removing screen of cleaned lump coal, heavy medium removing scr een of lump refuses and dilute medium barrel were eliminated and the investment would be reduced. The coal preparation technique with heavy medium recovery syste m jointly applied to lump coal and fine coal could have good suitability to the steam coal separation and could provide basis to the promotion in the coking coal preparat ion plant.

天地科技开采设计事业部青年创新基金资助项目(KJ-2013-TDKC-20)；