Method of manufacture of pig iron using hollow tube to reseal ta

Details Method of manufacture of pig iron using hollow tube to reseal ta Method of manufacture of pig iron using hollow tube to reseal ta

1991-03-06

1991-10-22

Andrews, Melvyn J.

Metallurgical apparatus

Process

Plugging or tapping

75467, 75584, 266271, C21B 712

Patent

active

050588648

ABSTRACT:
In the manufacture of pig-iron in a shaft furnace, a taphole is closed with hardened plugging compound during making of the iron and is opened for the tapping of the iron and then resealed. The resealing of the taphole comprises inserting hardenable plugging compound into the taphole and, before hardening thereof, driving a hollow tube into the plugging compound. The hollow tube has an open front end. The tube is pulled out at the next tapping. The use of a tube avoids disturbance of the plugging compound and creates a smoother taphole, leading to improved flow of liquid iron.

REFERENCES:
patent: 3618926 (1971-11-01), Barnat
patent: 4909487 (1990-03-01), Schneider
patent: 4960379 (1990-10-01), Schneider
T. Nagai, Patent Abstracts of Japan, vol. 7, No. 66 (C157) [1211], 03/18/83.
S. Hogi, Patent Abstracts of Japan, vol. 7, No. 118 (C-167) [1263], 05/21/83.
T. Yamane, Patent Abstracts of Japan, vol. 12, No. 202 (C-503) [3049], 06/10/88.

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