Sand mill

An outer cylinder is fixedly arranged, a rotor is rotatably arranged in the outer cylinder, a stator is arranged in the rotor, the stator is fixedly connected with the outer cylinder, a first grinding channel is formed between the rotor and the outer cylinder, a second grinding channel is formed between the rotor and the stator, and a discharging channel is arranged in the stator. Materials sequentially pass through the first grinding channel and the second grinding channel to be ground, and after grinding is completed, the materials enter the discharging channel to be discharged. And when the materials are located in the first grinding channel, first rod nails are arranged on the outer wall of the rotor, second rod nails are arranged on the inner wall of the outer barrel, the rod nails are additionally arranged, the grinding times are increased, the retention time of the materials in the cavity is prolonged, and therefore the grinding efficiency is improved. 本实用新型是一种砂磨机，外筒体固定设置，外筒内转动设置有转子，转子内设置有定子，定子与外筒体固定连接