Abstract:

In order to strictly control the cost of coal washing, with considering the reasons of high medium consumption, Chengjiao coal preparation plant has performed a series of technology and management measures, optimizing treatment technology of coarse coal slime, completing low density dense medium coal preparation, improving the subsequent technology and equipment of dense medium system and establishing evaluation system. These technical measures completed the high efficient recovery and purification of medium, and reduced medium consumption sharply. Finally, the value of medium consumption is stable in approximate 0.3 kg/t relative to raw coal, and some key technologies of controlling medium consumption in a full dense medium coal preparation plant has been developed, with the advanced international level.

Key words: dense medium, coal preparation practice, medium consumption, ultralow medium consumption