Process for melting of metal materials in a shaft furnace

摘要

PCT No. PCT/CH97/00080 Sec. 371 Date Feb. 6, 1998 Sec. 102(e) Date Feb. 6, 1998 PCT Filed Mar. 3, 1997 PCT Pub. No. WO97/33134 PCT Pub. Date Sep. 12, 1997A process for smelting metallic raw materials in a shaft furnace having beds of metallic raw material and coke comprises injecting concurrently into the shaft furnace (1) a mixture of flue gases and oxygen at a subsonic velocity and (2) preheated oxygen at supersonic velocity wherein the supersonic velocity oxygen is injected into the coke bed.