Abstract: The problem facing the coal preparation plant is that in operation of the ZM600 high-efficiency mineral separator, rise of dust occurs from the screen, bunk-bottom feeder, belt conveyor transfer point and bunkering crusher.To tackle the problem, the plant adopted a series of measures, such as addition or improvement of dust collection equipment at the dust raising sources, optimization of control program, addition of automatic dust suppression water sprayer.Practice shows that through adoption of the dust control measures, the dust concentrations in the main workshop and at the outlet of induced draft fan, refuse belt conveyor transfer point and crusher are respectively reduced to 4.0, 4.5, 20.0, 9.5 mg/m³, well meeting the environmental protection requirements.