The utility model relates to the technical field of open pit
coal mining, in particular to a dust removal device for open pit
coal mining, which comprises a bottom frame, the upper end of the bottom frame is fixedly connected with a U-shaped sun shield through a support rod, a cooling-water
machine is mounted in the bottom frame, and the outer wall of the cooling-water
machine is communicated with a drainage
pipe. The outer wall of the drainage
pipe communicates with two vertical pipes which are distributed left and right, the other ends of the two vertical pipes penetrate through the sun shield and communicate with flow guide pipes, and a plurality of evenly-distributed atomizing nozzles are installed on the opposite faces of the two flow guide pipes; cold water in the cooling-water
machine is drained to the atomization spray head through the drainage
pipe and the flow guide pipe to be sprayed out through the water pump, normal-temperature water is cooled into low-temperature
ice water through the cooling-water machine, the water mist
evaporation speed can be preliminarily reduced, the atomization spray head can be shielded through the sun shield, and the situation that the temperature of the spray head rises due to
sun exposure is prevented; and the water mist
evaporation speed is further reduced.