The invention provides a dense medium coarse slime sorting device and a sorting process. Four rows of water spraying nozzles of a raw
coal desliming screen of the sorting device are arranged, and the size of screen cuts is 1 mm. Two rows of water spraying nozzles are formed in a fine
coal slime vibration arc desliming screen, and screen bars are prismatic. The height of an overflow weir of a TBS sorting
machine can be adjusted. A dense medium
hydrocyclone is adopted for a main washing process; according to the auxiliary washing process,
coal slime sequentially passes through a conical inclined plate
settling pond, the TBS classifying
hydrocyclone, the TBS sorting
machine, an ore concentration arc desliming screen, a
clean coal magnetic
tail barrel, a concentration
hydrocyclone set, the fine coal slime vibration arc desliming screen and a fine coal slime centrifugal
machine to obtain
clean coal, the fine coal slime is floated to obtain the fine coal, and the rest is tailing. The sorting device enables the dense medium coal selecting process to be further optimized. After the coarse coal slime is separated from a dense medium main washing
system, the coarse coal slime sorting process is more reasonably, and the
recovery efficiency of the
tail fine coal is obviously improved; as a coarse coal slime sorting
system is improved, the content of ash in the coarse coal slime is lowered, the dense medium main washing sorting density and the sorting precision are effectively improved, and the effect of dense medium main washing is ensured.