Loading patent…
AssigneeWieland-Werke A.G., Metallwerke
InventorsManfred Beller, Hans Wiedenmann
Estimating the term…
A process and apparatus for controlling the level of a molten metal surface in a continuous casting mould uses a probe located either in the molten or above the surface of the molten metal. The probe is connected to a high-frequency transmitter which is arranged to induce voltages in each of two secondary receiver-coils, the receiver-coils being in coupling relationship with a compensating coil and a further coil connected to the probe. The receiver-coils are connected in opposition to one another so that a difference voltage of zero is arranged to be produced when the molten metal surface is at the required level but that the difference voltage is used, when departing from zero, for control purposes of the height of the molten metal surface.
A process for controlling the level of a molten metal level in a continuous casting mold comprising the steps:
In a continuous casting system, an apparatus for controlling the level of a molten metal surface in a continuous casting mold, said apparatus including a probe located in the vicinity of the continuous casting mold for sensing the molten metal surface, a first coil connected to said probe, a compensating coil associated with said first coil, two secondary receiver coils connected in opposition and in coupling arrangement with said first coil and said compensating coil, a primary coil associated with said secondary receiver coils and a high frequency transmitter connected to said primary coil, whereby with all said coils spatially separated from the mold, said secondary receiver coils being spaced apart and solely inductively electrically connected to said first coil and said compensating coil such that a voltage difference may be induced in said secondary receiver coils by the influence of the first coil acting on said secondary receiver coils which voltage difference will be reduced substantially to zero when the molten metal surface attains a predetermined level and the voltage difference in the secondary receiver coils may thereafter be balanced to maintain substantially zero difference thereby to control the level of the molten metal surface in the mold.
Dependencies are inferred from the claim text.