MICROSPHERES SELECTION METHOD BY STRENGTH TO SET PRESSURE Russian patent published in 2018 - IPC B03B5/28 G01N3/12 C04B18/10 

FIELD: technological processes.

SUBSTANCE: microspheres selection method by strength to a set pressure includes hydrostatic reduction of microspheres by the set pressure, separation of undestroyed microspheres after reduction with the help of flotation technique and drying the separated microspheres. The selected microspheres are checked for consistency with the strength to the set pressure, for example, by isotropic reduction. Before hydrostatic reduction, the necessary fraction of microspheres is separated. As a raw material, hollow ash or glass microspheres are used.

EFFECT: production of strong microspheres withstanding the required pressures, with a slight change in the density of the microspheres.

3 cl, 3 tbl, 6 ex