Sand mill is also known as ball mill. It is mainly used for wet grinding in all walks of life. According to its performance, it can be divided into vertical ultra-fine nano sand mill, horizontal bar pin sand mill, horizontal disc sand mill, basket sand mill, etc. It is mainly composed of body, grinding cylinder, disperser, bottom valve, motor and material cylinder of feed pump. The feeding speed is controlled by feed pump. The grinding media of the equipment are generally divided into zirconia beads, alumina beads, zirconium silicate beads, etc. Generally, pneumatic diaphragm pump is used as conveying pump. Gear pump, peristaltic pump and other thick slurry pump are recommended for special materials.