Grinding device for grinding materials for boron nitride production

The utility model relates to the technical field of boron nitride production equipment, in particular to a crushing device for grinding materials for boron nitride production, which comprises a bottom plate, two material boxes are fixedly connected to the top of the bottom plate, three supporting rods are fixedly connected to the top of the bottom plate, and a first case is fixedly connected to the tops of the supporting rods. A first driving rod is arranged on the first machine box, two discharging pipes are fixedly connected to the first machine box, a smashing pipe is fixedly connected to the discharging pipes, first driving motors are fixedly connected to the outer walls of the discharging pipes, the number of the first driving motors is six, and a feeding pipe is fixedly connected to the top of the smashing pipe. The first driving motor is started to enable the screen to rotate, the screen rotates to screen boron nitride abrasives, the large-particle boron nitride abrasives are prevented from falling int