DEVICE FOR HEAT TREATMENT OF INORGANIC POWDER MATERIALS TO PRODUCE HOLLOW LIGHTWEIGHT GRANULES AND METHOD FOR HEAT TREATMENT OF INORGANIC POWDER MATERIALS USING IT Russian patent published in 2021 - IPC F27B15/10 

FIELD: chemistry.

SUBSTANCE: invention relates to a method for heat treatment of inorganic powder materials of hollow lightweight inorganic fine fillers based on perlite, pehstein, vermiculite and other natural and synthetic materials. The method includes the supply of feedstock injected from below together with a flow of preheated air, heat treatment of the resulting feedstock flow in a core, which has hydraulically independent heating and cooling belts, while heat treatment of the flow is carried out by heating by burners independent of each other equipped with flameless burner panels that ensure the combustion of a fuel-air mixture with the formation of flue gases, which are supplied under pressure to corresponding core heating belts through at least one gas-permeable partition forming walls of a gas-permeable chamber, a predetermined temperature mode is created in each core heating belt, while one or more cooling belts are created in the upper part of the core by primary suction of atmospheric air and feeding its flow through the gas-permeable partition into the core for mixing with the flow of distend particles, preheated air is fed to the lower part of the core at a predetermined speed, and at the output from the core, discharge is created by forced suction of exhaust gases, the flow of hollow lightweight granules formed at the output from the core is cooled with air by means of its secondary suction and collected in a container. A device for heat treatment of inorganic powder materials with the production of hollow lightweight granules of inorganic fine fillers is disclosed.

EFFECT: hollow lightweight granules with closed porosity and high strength are obtained from inorganic raw materials of fractions from 0 to 1000 mcm, including those containing a fine fraction of 0-250 mcm, with a yield of hollow lightweight granules of 90-98.5%.

13 cl, 12 dwg, 5 tbl