Blast pipe and tuyere arrangement for a blast furnace and method

Details Blast pipe and tuyere arrangement for a blast furnace and method Blast pipe and tuyere arrangement for a blast furnace and method

1993-07-14

1994-08-02

Andrews, Melvyn J.

Metallurgical apparatus

Process

Tuyere operation

266 87, 266221, 266225, 266267, 75459, 75460, C21B 716

Patent

active

053338405

ABSTRACT:
Fuel and combustion gas are supplied to the blast pipes and tuyeres of a blast furnace through injection lances which have an inner tube and an outer tube. The inner tube is generally used to carry the fuel, while the space formed between the inner and outer tubes is used to carry the combustion gas. Such a lance can have a heat resistant tip which has a bore for forming an extension of the inner fuel supply tube, and which also has a number of helical channels disposed about the bore for forming an extension of the space between the tubes. It is advantageous to have more than one such lance in each blast pipe and to have the lances extend obliquely into the hot blast channel that is formed by the blast pipe and the tuyere.

REFERENCES:
patent: 3758090 (1973-09-01), Shimotsuma et al.
patent: 3832121 (1974-08-01), Metz et al.
patent: 3920230 (1975-11-01), Murphy
patent: 4490171 (1984-12-01), Suzuki et al.
patent: 4921532 (1990-05-01), Corbett et al.

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