Method for recovering powder materials and device therefor

The invention discloses a method and a device for recovering powder materials. The device is characterized in that a recoverer is arranged between a slurry tank and an exhaust pipe; a hollow plastic ball is employed to slow down the air current and adsorb the powder materials; and a sprayer is arranged inside the recoverer, and is used for spraying the adsorbed powder materials back to the slurry tank under the sprayer. The recoverer consists of a housing, a bottom baffle, the sprayer and a recovering ball, which is characterized in that the bottom baffle has a porous structure or a screen structure, and has a pore size less than the diameter of the recovering ball. The recovering ball is located in the hosing, a buffer zone is provided between the recovering ball and a top of the housing, and the sprayer is installed at the top of the housing. The recovering ball is a lightweight hollow plastic ball with a smooth surface, just like a table-tennis ball and the like. By adopting the above scheme, the content o