The document discusses processing potassium feldspar into a 3000 mesh powder and recommends using a powder grinder machine. The powder grinder machine from Shanghai Clirik Machinery Co. can process potassium feldspar, a non-renewable resource, into a superfine powder up to 3000 mesh. It has features like high efficiency, long lifecycle, high safety and reliability, flexible adjustment, and environmentally-friendly operation. The powder grinder machine is suitable for producing very fine powders from non-flammable and non-explosive brittle materials.