Circulating device for ball grinder

The utility model relates to a circulating device for a ball grinder, which comprises the ball grinder and is characterized by further comprising a storage tank, wherein the bottom of the storage tank is connected with the top of the cylinder body of the ball grinder through a pipeline; a first circulating pump is arranged on the pipeline between the bottom of the storage tank and the top of the cylinder body of the ball grinder; the top of the storage tank is connected with the bottom of the cylinder body of the ball grinder through another pipeline; and a second circulating pump is arranged between the top of the storage tank and the bottom of the cylinder body of the ball grinder. When the circulating device for the ball grinder is used, powder in the storage tank is pumped into the cylinder body of the ball grinder through the first circulating pump to be ground, after the grinding, coarse powder gradually settles to the bottom of the cylinder body of the ball grinder, and the coarse powder at the bottom