Method and device for the injection of pulverised coal into...

Details Method and device for the injection of pulverised coal into... Method and device for the injection of pulverised coal into...

C - Chemistry, Metallurgy

21

B

C21B 5/00 (2006.01) C21B 7/16 (2006.01) F27D 3/16 (2006.01)

Patent

CA 2098514

METHOD AND DEVICE FOR THE INJECTION OF PULVERISED COAL INTO A BLAST-FURNACE CRUCIBLE ABSTRACT A method is provided for the combined injection of pulverised coal and a gaseous oxidant into a crucible of a shaft furnace, especially a blast furnace, through a hot-air blast tuyere. In the region of the nozzle end of the tuyere in the crucible, the pulverised coal is injected into the hot-air blast, in the form of a hollow annular jet and the gaseous oxidant is injected inside the hollow annular jet. A lance for implementing the method comprises two coaxial tubes (16 and 18) and a distributing unit provided with a central bore (52) for the pulverised coal. Fig. 3.

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