Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1983-03-21
1984-12-25
Andrews, M. J.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
266267, 266182, 266188, C21B 716
Patent
active
044901712
ABSTRACT:
A method for injecting a pulverized fuel into a blast furnace uses a pulverulent fuel injecting burner which is protruded into a blow pipe through a wall thereof near the tuyere of a blast furnace. The burner injects a pulverized fuel into the blast furnace along with a hot blast of air at a temperature higher than 950.degree. C. flowing through the blow pipe. The tip end of the burner is located at a distance L between 100 and 350 mm upstream from the boundary between the tuyere of the blast furnace and the blow pipe. According to one embodiment, the tip of the furnace is tapered by an angle .theta..ltoreq.1400L.sup.2 -1290L+295. According to a second embodiment, the inner diameter B.sub.1 of the blow pipe, and the inner and outer diameters of the burner tip (d and D) are selected such that 0.1.ltoreq.(D/Bi).ltoreq.0.25 and 0.6.ltoreq.(d/D).ltoreq.0.8. According to a third embodiment, the burner tip is removable.
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patent: 3558119 (1971-01-01), Demalander
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E. M. Summers, et al., Coal Injection into No. 5 Blast Furnace at Stanton and Staveley Ltd., May 22, 1963.
S. Garber, Ph.D., Recent Developments in Annealing, May 22, 1983.
J. H. Strassburger, et al., Solid Fuel Injection at the Hanna Furnace Corporation.
Solid Fuel Injection System No. 4 Blast Furnace Weirton Steel Company, Jun. 20, 1963.
Hirose Ryoichi
Kasai Taketsugu
Komatsu Hiroyuki
Suzuki Tomio
Tamada Shinichi
Andrews M. J.
Kobe Steel Limited
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