ROTARY-PERCUSSION CRUSHER Russian patent published in 2015 - IPC B02C13/14 B02C23/12 

FIELD: process engineering.

SUBSTANCE: proposed mill can be used in construction, mining, chemical industry and metallurgy. This mill comprises rotary-percussion crusher and air sizer arranged there above. Crusher comprises case 1, accelerator 2, baffle plates 4, funnel 8 to feed material into accelerator, pipe to feed initial material into funnel and pipes 11 at case bottom to force air into mill. Baffle plates and funnel can displace vertically. Air sizer comprises hollow case 12 with material separation chamber 13, horizontal insert 14, blades to turn in horizontal, means to return coarse particles in accelerator for additional grinding and pipe 18 to discharge ground particles with air. Said means to return coarse particles comprises circular top and bottom parts with chutes 16. The latter are spaced apart in circle about case 12. Blades are fitted between case insert 12 and top part of said particles return means. Clearance 5 between crusher case inner surface and baffle plates is communicated with sizer material separation chamber.

EFFECT: higher efficiency of grinding.

1 dwg