... sifting Automatic Drum Rotary Sieve for Sand Washing and Grading machine 1. Operating PrincipleDrum screen ... , clay, mountain meal, sand, etc.2) Coal Industry: lump coal, coal dust, coal washing, etc.3) Cold Mine: gold screening and ... Φ6001500-3000 or as requested, itis related to the sifting ratio of the material 1-53GS ... -proof device.3) With pump for mineral ore washing, such as gold, sand, etc.4) With ...