Specialized metallurgical processes – compositions for use therei – Processes – Process control responsive to sensed condition
Patent
1990-11-29
1993-02-02
Andrews, Melvyn J.
Specialized metallurgical processes, compositions for use therei
Processes
Process control responsive to sensed condition
75446, 75707, 266 80, 266 89, 266172, C21B 724, C21B 1314
Patent
active
051834952
ABSTRACT:
A method for controlling a flow rate of gas for prereducing ore comprises the steps of prereducing ore in a prereduction furnace having a fluidized bed with a gas generated in a smelting reduction furnace and controlling a pressure of gas generated in the smelting reduction furnace and introduced into the prereduction furnace, thereby controlling the actual flow rate of gas introduced into the prereduction furnace. An apparatus for controlling a flow rate of gas for prereducing ore comprises a flow passage for introducing gas generated in a smelting reduction furnace into a prereduction furnace and a gas pressure control valve positioned in the flow passage.
REFERENCES:
patent: 3033673 (1962-05-01), Collin et al.
patent: 4591381 (1986-05-01), Axelsson et al.
patent: 4940488 (1990-07-01), Maeda et al.
Ariyama Tatsuro
Isozaki Shinichi
Kanatani Genji
Matsuo Masahiro
Yamada Kenzo
Andrews Melvyn J.
NKK Corporation
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