Provided is a large type crushing and
grinding machine for crushing and
grinding alumina crusting blocks. The large type crushing and
grinding machine for crushing and grinding the
alumina crusting blocks comprises a feeding part, a
main bearing, a rotation part, a driven gear, a
discharge part, a driving gear, a speed
reducer, a main motor, a low-speed driving device and a lubricating device. One end of the feeding part stretches inside the rotation part of the crushing and grinding
machine, the rotation part penetrates through the
main bearing, the
main bearing supports the rotation part as a supporting device, the rotation part is connected with the driven gear through bolts, the driving gear is meshed with the driven gear and drives the driven gear to rotate, the driving gear is connected with the speed
reducer, the speed
reducer is connected with the main motor through a coupler, the other end of the main motor is connected with the low-speed driving device through a
clutch, and the lubricating device is arranged on the main bearing. The rotation part further comprises a feeding end cover plate, a feeding port, a feeding hollow journal, a feeding cone end cover, an end lining plate, a
barrel body, a groove plate, a corrugated plate, an upper shifting plate, a lower shifting plate, a
barrel body lining plate, a pressing bar, a
discharge cone end cover, a
discharge hollow journal and a discharge spiral. The large type crushing and grinding machine for crushing and grinding the
alumina crusting blocks aims at achieving large energy generation under small wind action.