Refractory-lined shaft furnace containing free carbon

Metallurgical apparatus – Means for treating ores or for extracting metals – By means applying heat to work – e.g. – furnace

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266280, C21B 706

Patent

active

041391837

ABSTRACT:
Shaft furnace having a shell, a refractory lining along at least part of its inner surface of a material which contains at least 50% free carbon, and which furthermore is provided with a water-cooled tuyere which is in contact with the refractory lining, including at least one extra layer of a material provided below the cooled tuyere in the refractory lining, over at least part of its thickness and substantially transversely to the direction towards the cooled tuyere which at the temperature of this layer during operation cannot locally react chemically with water and/or with the reaction products of water and carbon and a closed circular gutter which is connected to one or more de-watering openings through the shell, at least one of the extra layers at the side of the furnace shell being connected to said gutter.

REFERENCES:
patent: 486110 (1892-11-01), Kennedy
patent: 628790 (1899-07-01), Gaines et al.
patent: 2124437 (1938-07-01), Steinbacher
patent: 3810610 (1974-05-01), Berczynski
patent: 3953007 (1976-04-01), VAN Laar
PUBLICATION: Carbon Hearths in Republic Blast Furnaces; by the American Institute of Mining & Metallurgical Eng.; 1948.
Carbon Hearths in Republic Blast Furnaces; American Institute of Mining & Metallurgical Eng.; 1948.
Unger; Blast Furnace & Steel Plant; Apr. 1948; pp. 434-438.

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