Ore crushing device

The utility model provides an ore crushing device, and belongs to the technical field of ore crushing. The dry-mixed mortar circulating crusher comprises a base and a speed regulating mechanism. The base comprises a box body, the speed adjusting mechanism comprises a surrounding plate, a fixed arm and a baffle, an operator pours ore into the surrounding plate and close to the feeding groove area, meanwhile, the operator can drive a rotating disc to rotate, and the rotating disc rotates to drive one end of the fixed arm to rotate; a baffle connected with one end of a fixed arm slides in a strip-shaped groove in a reciprocating mode under the action of a guide rod, the baffle continuously closes and opens and closes a feeding groove, and therefore the effect of controlling the ore entering speed is achieved, it is avoided that a large amount of ore is poured in at the same time, and it is avoided that a pulverizer needs long-time cyclic pulverizing treatment; the cyclic crushing efficiency of the crusher is ens