SCREW-TUBE FURNACE (VERSIONS) Russian patent published in 2017 - IPC F27B7/00 

FIELD: furnaces.

SUBSTANCE: invention relates to burning furnaces of continuous operation for thermal processing a material with controlled gas atmosphere and heating temperature in the continuous operation mode and with continuous stirring the material, in particular, to a screw-tube furnace. Screw-tube furnace includes a heat-insulating housing, electric heaters, a pipe-retort equipped with a loading and an unloading chutes, a branch pipe for air feed/intake and an uptake; a screw located inside the pipe-retort and made with the possibility of rotation from an electric drive; a gas duct, a dust collection system and a control instrumentation system, herewith the pipe-retort diameter is 1.4–2.5 times larger than that of the screw forming an above-screw space inside the pipe-retort. Screw-tube furnace can be made of two, three or four stages. Provided is the possibility of processing both powder and fine materials with the humidity of up to 70 % abs. and the content burnt out and highly volatile components from 5 to 95 %, herewith the dust entrainment makes ~0.5 % from the load.

EFFECT: screw-tube furnace for processing powder and fine materials.

18 cl, 4 dwg