METHOD OF PRODUCING PELLET POWDER FOR SMALL ARMS CARTRIDGES Russian patent published in 2016 - IPC C06B21/00 

FIELD: weapons and ammunition.

SUBSTANCE: invention relates to production of spherical gun powders (SGP) for small arms. Method comprises producing powder lacquer, dispersion of its spherical particles, dewatering and ethyl acetate distillation from powder followed by washing, sorting with tap water and drying. On rotating drums of two-stage sorting irrigated water is supplied from water collector through nozzles. Water-powder suspension after sorting is collected in target fraction and back-and-technological wastes (BTW) collectors, where deposition of powder elements is conducted due to forces of sedimentation. Later target fraction is supplied on phlegmatisation phase or drying, and BTW are returned to technological process for subsequent processing. Excess water from powder target fraction and BTW collectors is cleaned of fine micrometre particles of powder in labyrinth, from which waste water enters into water collector for further use in closed cycle with irrigation of rotating drums in two-stage separation.

EFFECT: method allows to reduce process water discharge in sewerage and provides re-use of tap water in closed process cycle.

1 cl, 1 tbl, 5 ex