MATERIALS GRINDING APPARATUS Russian patent published in 2007 - IPC B02C23/12 

FIELD: technique for grinding of various ore materials and also materials other than ore.

SUBSTANCE: apparatus has percussion centrifugal mill and air-gravitational classifier connected to mill having working tool mounted within casing on vertical pin. Classifier has housing consisting of battery of cascade-type classification shafts having rectangular section and arranged along perimeter of equilateral polygon, funnel adapted for feeding of large-sized fraction for repeated grinding and positioned immediately above mill working tool, and branch pipe designed for discharge of small-sized fraction in conjunction with air flow and positioned within upper part of housing. Lower part of outer walls of classification shafts is connected to upper part of mill casing.

EFFECT: increased efficiency in grinding of various materials.

2 dwg