COMBINED BURNER AND TUYERE FOR ELECTRIC ARC FURNACES Russian patent published in 2013 - IPC F27B3/22 

FIELD: metallurgy.

SUBSTANCE: proposed device comprises burner to fire fuel and oxidiser and tuyere. Note here that the latter is equipped with convergent-divergent nozzle with critical section of d diameter. Note also that tuyere and nozzle outlets are not concentric and spaced by distance D where D is smaller than or equal to 20 * d, preferably, smaller than or equal to 10 * d, while tuyere axis and burner axis make the angle varying from 10° to 40°, preferably from 15° to 30°. Note that said burner is used in, at least, one part of smelting process for fuel and oxidiser combustion to generate flame inside electric arc furnace while tuyere is used at refining to generate supersonic jet.

EFFECT: higher power efficiency.

16 cl, 4 dwg