Method for heating ingot in soaking pit

Details Method for heating ingot in soaking pit Method for heating ingot in soaking pit

1977-05-02

1978-10-17

Cohan, Alan

Heating

Processes of heating or heater operation

Treating an article, container, batch or body as a unit

432 18, C21D 152, F27B 302

Patent

active

041206428

ABSTRACT:
A steel ingot having a still-liquid portion therein is charged into a soaking pit; then, said ingot is heated by injecting a fuel from a combustion unit of said soaking pit into said soaking pit with a constant and minimum fuel flow rate capable of holding a pit temperature higher by from 10 to 100.degree. C than the cold point temperature of said ingot at the completion of solidification of said still-liquid portion in said ingot, until said still-liquid portion in said ingot is completely solidified; and then, upon the completion of said solidification, the surface portions of said ingot are further heated up to above a prescribed temperature permitting rolling thereof by injecting a fuel from said combustion unit into said soaking pit with a constant fuel flow rate of at least 60% of the maximum fuel flow rate of said combustion unit, thereby reducing the fuel consumption in said soaking pit.

REFERENCES:
patent: 2983499 (1961-05-01), Sidwell
patent: 3548171 (1970-12-01), Kody
patent: 3672654 (1972-06-01), Knaak
patent: 3689041 (1972-09-01), Pere

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