METHOD OF HYDROELECTRIC GRINDING BY HYDROELECTRIC GRINDER (VERSIONS) AND DEVICE TO THIS END (VERSIONS) Russian patent published in 2013 - IPC B02C19/00 

FIELD: process engineering.

SUBSTANCE: invention relates to fine grinding of various materials. In compliance with first version, proposed method comprises grinding the stock, sizing the product and regrinding of underground product. Said underground product is sized to, at least, two size fractions. Fractions are sent back in separate flows. Coarse fraction 11 is carried by mechanical means 13 while fine fraction 12 is transferred by either hydraulic and/or hydropneumatic means 14. In compliance with second version, fine fraction 12 is additionally subjected to dehydration before recycling. Device, in compliance with first version, comprises hydroelectric grinder 3 including discharge grate 4, sorting means and recycling means. Note here that sorting means allow sizing underground product to, at least, two fractions while recycling means allow separate recycling of every fraction. Coarse fraction 11 is carried by mechanical means 13 while fine fraction 12 is transferred by either hydraulic and/or hydropneumatic means 14. In compliance with second version, proposed device comprises dehydration means. In compliance with third version, at least, portion of working electrodes is mounted above grinding chamber bottom solid part.

EFFECT: electric power savings.

11 cl, 6 dwg