Optimization study on the application of induced dust suppression cover in primary crushing station of open-pit mine

Aiming at the problems of large dust production, high dust removal cost and poor dust suppression effect of primary crushing station in open-pit mine, the new type dry device-dust suppression cover was put forward, which induced dust to complete the circular clean movement with closed loop eddy current inside the enclosure by means of pressure balance and closed loop flow. After field application, it was found that the dust suppression effect of the device was not ideal and it was seriously affected by wind. By means of fluid dynamics simulation, the structure of the device was optimized for design and engineering application. The simulation results showed that the optimized device enhanced the overall upward movement trend of the internal air flow, weakened the transverse movement trend of air flow, and blocked the interference of ambient wind, which can effectively inhibit the driving effect of overdraft on dust dispersion. The monitoring results showed that the dust concentration around the optimized device was significantly lower than that before optimization, and the lowest concentration can reach 0.33 mg/m(3), which met the requirements of environmental protection emission.