Wet pan mill is widely used for selecting ferrous metals, nonferrous metals and nonmetals, as well as precious metals like gold and silver. It mainly consists of driving device, frame, water basin, grinding wheels and grinding base, etc. It grinds ores by wheel driving force: firstly, the power is transferred from the motor to the reducer, then to the horizontal shaft, and finally to the grinding wheel; the wheels then rotate anticlockwise. The wheels can revolve around the vertical shaft of the pan mill, at the same time, it can revolve on its own axis, while the grinding base will remain still. The ores are then pressed, rubbed and grinding repeatedly.