Mineral dust removal design in ore dressing production in crushing screening, loading and unloading transportation, dry grinding powder dry separation process, etc, the population accounts for about 0.5% ~ 1.0%, the rate of ore initial concentration of 2 ~ 5 g/m3, dust of true density of about 4 t/m3, particle size is greater than 20 microns accounted for 60% ~ 80%. Mineral dust comprehensive dust control measures should be taken to, basically have airtight, wet dust prevention and dust source mechanical dust removal.

(1) sealed dust source. Different features according to the production equipment of producing dust point respectively set up local airtight cover, airtight cover whole airtight cover and big volume. Airtight cover is strong and durable, sealed performance is good, easy operation and maintenance.

(2) the wet dust. Including the humidifying water dust removal, the supplies to the indoor air spray dust and comprehensive water rinse. Hydraulic dust removal of water allocation in the starting point of dust and ore crushing processing centers to some more. Spray dust use rotary spray unit more regular spray for indoor air with dust, in order to reduce the dust density. Comprehensive water flushing, refers to the dust of the surface of the equipment, walls, floor flushing regularly, in order to reduce the secondary dust. The role of water washing facilities at 10 ~ 15 m radius, water supply pressure is not less than 196 kpa, each at point of water consumption of 1.5 L/s, flush per metre 2 area water 6 L. In cold area of cold season, wet dust should strengthen warm anti-freezing measures.

(3) mechanical dust removal. The layout of the dust removal system design division generally correspond to craft series, can be divided into distributed system and centralized system. Wet dust collector is generally selected dust removal system of purification equipment, such as impulse type dust collector, low pressure venturi dust catcher, etc. When insufficient water or antifreeze solution and using dry grinding dry cleaning process, can choose the bag filter. Wet dust collector of dust discharge sewage to the pulp thickening pool.