FIELD: technological processes.
SUBSTANCE: method of granular materials treatment is implemented in two stages. At the first stage granular material is heated for 30-90 sec by means of convection heat supply up to temperature of 105-120°C with pressure increase in chamber of up to 0.15-0.20 MPa. At the second stage granular material is heated for 10-30 sec up to temperature of 120-180°C, using electromagnet microwave filed with specific power of at least 5 kilojoule/kg·s, with simultaneous reduction of pressure in microwave chamber down to 0.01-0.02 MPa.
EFFECT: invention allows to reduce portion of the most expensive component of power inputs for process implementation.
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