Tungsten Carbide Porous Nozzle Factors V

The spraying distance ensures that the smallest rebound degree and the best strength, which plays a significant role in rock cracking. In general, it requires intensive compound and a rebound degree, which is as small as possible. If the spraying distance is inappropriate, the greater pressure can not improve the efficiency of rock cracking even if it exceeds the threshold pressure of rock.

There is a scope of the spraying distance, which is normally 5-6 times longer than the equivalent diameter of nozzle. The main reason is that the flow is independent and inadequately mixed with other flows in a small range of spraying distance. When the spraying distance exceeds a certain range, the flow will be blocked by surrounding media so that the energy is decreasing until it is lower than the threshold pressure for rock cracking, which reduces the efficiency.

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