B - Operations – Transporting – 22 – D
Patent
B - Operations, Transporting
22
D
22/57
B22D 11/18 (2006.01) G01F 23/22 (2006.01) G01F 23/24 (2006.01)
Patent
CA 1219725
ABSTRACT OF THE DISCLOSURE: A method of automatically controlling changes in surface level of a melt in a continuous casting mold wherein a boundary layer including a gas phase without abrupt impedance change is provided between the melt and an overlying fluid medium. The method comprises the steps of: providing a bath of molten metal, forming the melt in a continuous casting mold overlain by the fluid medium; periodically thrusting a probe through the boundary layer toward the melt without contacting same and retracting the probe away from the melt so that the probe lies in the gas phase out of any cover of the melt; during the periodic advance and retraction of the probe measuring the electrical impedance between the melt and the probe to provide a control signal; and controlling the level of the melt in the mold in response to the control signal, reversing the direction of movement of the probe in a vertical sense when a selected value of the impedance has been reached. And an apparatus for carrying out the method.
456968
Christ Rolf
Naaf Rudiger
Schliefer Heinrich
Norddeutsche Affinerie Ag
Robic Robic & Associes/associates
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