B - Operations – Transporting – 02 – C
Patent
B - Operations, Transporting
02
C
B02C 18/08 (2006.01)
Patent
CA 2147666
A centrifugal rock pulverizing machine with rigid arms is proposed where the principle of self/autogenous airborne impacting is used together with the high speed shock sonic cracking impact effect; the cracks generated by the high speed impact rigid arms are self propagated through the rock to be pulverized with a speed close to the speed of sound in the rock; at the same time the airflow inside the machine is patterned in such a way that to maximize the airborne self-impacting autogenous cracking/grinding effect; an optimum airborne and sonic crack propagation spectra was determined determining in turn the optimum rpm of the centrifugal rotor of the machine as well as a proper configuration of the reaction and wear surfaces; applying the said configuration and the sonic crack generation/propagation and the airborne self impacting/autogenous pulverizing pattern it is possible to achieve sizes from 0 to 100 microns eliminating substantial or all stages of comminution immediately after the first crushing stage in ore processing in mining industry and reducing considerably the power consumption, making possible, for example in the gold ore processing industry, to eliminate all stages after the primary jaw or gyratory crusher delivering the pulverized rock directly to the cyanide process, by this reducing substantially the pulverizing cost and power consumption for such operations.
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