METHOD OF PRODUCING GRAINY FILTER MEDIUM, PARTICULARLY, ANTHRACITE CRUMB FOR LIQUIDS Russian patent published in 2002 - IPC

FIELD: methods of production of GRAINY filter media for mechanical purification of liquids in systems of water treatment. SUBSTANCE: method includes crushing of material, its drying, stage fractionation. Oversize fraction of the first stage of fractionation is crushed. Drying is carried out before fractionation to moisture content not more 2%. Crushing of oversize fraction of the first fractionation stage is carried out in vertical hammer crusher with single-blade hammers and linear motion speed of 18-22 m/s and their number not more 12 pieces. EFFECT: economical use of raw materials due to reduced losses of them and increased yield of quality standardized material. 1 dwg