... , and then into the main grinding chamber evenly by the electromagnetic vibrating feeder, the material into the grinding chamber is cooped up by ... under negative pressure.technicalModel8021Power50kwFeeding size1-5mmProduct fineness500-8000meshDealing capacity800kgYield95% ultrafine grinding machine mining machine used in calcite, diatomite, barite, gypsum, alunite, graphite, phosphate ...