FURNACE FOR ANNEALING FINE-GRAINED MATERIAL IN FLUIDISED LAYER Russian patent published in 2013 - IPC F27B15/02 

FIELD: metallurgy.

SUBSTANCE: furnace comprises heating chamber with gas-distribution grate provided with feeder and communicated with sanitary cyclone, annealing chamber with fuel burners and overflow device inside cylindrical cavity wherefrom extends hot cyclone, guide baffle to separate material load zone from discharge zone, annular gas-distribution grate with shaped vanes, and cooling chamber with gas-distribution grate furnished with aid duct. Annular gas-distribution grate has thin shaped vanes. Besides, said blades are arranged at variable uniformly alternating spacing. Note here that annular gas distribution grate is furnished with thin shaped blades and guide baffle separating material feed zone from discharge zone. Fuel burners may be provided with tangential inlet for, at least, one of fuel components. Note also that maximum diameter of fuel burner spray corresponds to fluidised material thickness while its length corresponds to its width.

EFFECT: uniform annealing.

3 cl, 5 dwg