METHOD OF DRYING SPHERICAL POWDER Russian patent published in 2017 - IPC C06B21/00 

FIELD: weapons and ammunition.

SUBSTANCE: method of drying spherical powder (SP) involves feeding the powder with graphite via a cyclone-precipitator into the drying chamber, powder drying by supplying the coolant to the lower part of the chamber at a temperature of 88-98°C for 60-80 minutes, then for 140-180 minutes at a temperature of 65-75°C, powder cooling and unloading into the receiving hopper. The powder drying is carried out in a rotary two-chamber apparatus in the first chamber along with the powder loading in an amount of 20-40 kg (dry weight), where the powder is dried in the first zone at a temperature of 98-65°C and with an air head of 1.5-4.9 kPa together with moisture removal. Then, by rotating the mechanism, the first chamber with the powder moves to the second zone, where, by supplying air at a temperature of 20-30°C, the powder is cooled down to a temperature of 40-60°C for 15-25 minutes, while the powder is loaded to and then dried in the second chamber.

EFFECT: increased capacity of the powder drying device by using a two-chamber drying apparatus with a separation into zones of moisture removal and powder cooling.

1 dwg, 1 tbl