Method and apparatus for automatically controlling the rate of f

Details Method and apparatus for automatically controlling the rate of f Method and apparatus for automatically controlling the rate of f

1975-04-08

1979-01-30

Lake, Roy

Metallurgical apparatus

With control means responsive to sensed condition

With analyzer or computation means

266 83, 266245, C21L 534

Patent

active

041368576

ABSTRACT:
Flux is injected into the oxygen stream being fed to the tuyeres of a steel-refining converter, such as a Q-BOP converter or the like, and the rate of injection is controlled by varying the size of the outlet orifice of the flux-containing tank. The tank is pressurized to the same pressure as the oxygen stream into which the flux is being injected. The weight of flux in the tank is continuously measured and the actual weight is compared with a preset reference weight for each point in time. The difference between the two weights is used to drive a motor in either the forward or reverse direction to open or close the variable-orifice flux tank outlet valve an amount sufficient to adjust the actual injection rate to match the reference weight for a given time.
The current weight of flux remaining in the tank is compared with an initial weight; when the difference between the two exceeds a preset total, a signal is generated which causes the motor to close the variable orifice valve. At the same time, a fluid by-pass valve is opened to by-pass the injection apparatus.

REFERENCES:
patent: 2897009 (1959-07-01), Gianniny, Jr. et al.
patent: 3011773 (1961-12-01), Metz
patent: 3319828 (1967-05-01), Maxwell
patent: 3820768 (1974-06-01), Sieckman et al.
patent: 3871633 (1975-03-01), Kolb et al.
patent: 3884453 (1975-05-01), Pearce et al.
patent: 3897047 (1975-07-01), Kolb et al.
patent: 3920447 (1975-11-01), Schroeder et al.

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