Coal Preparation Technique with Heavy Medium Recovery System Jointly Applied to Lump Coal and Fine Coal

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.