1. The distance between the blade and gear ring can be adjusted conveniently and at will, realizing coarse and fine grinding. 2. Materials passes through grinding chamber from top to bottom and ground fully. 3. Materials distributed equally in grinding chamber in homogenizing plate, make each blade obtain equal load. 4. Grinding chambers destroy materials circulation layer effectively, improving the grinding efficiency. 5. The frame welded by steel. 6. The part of materials touches with grinding chamber use wear resistant replaceable parts. 7. Select high quality imported bearing, ensure main engine operate reliably.