Method and a device for detecting slag
AssigneeMPC, Metal Process Control A.B.
InventorsMats Jalk, Willy Ohlsson, Håkan Kelvesjö
Life of this patent
Estimating the term…
Abstract
A method and device are provided for detecting the presence of slag in a shroud through which molten metal passed from a ladle to a tundish. An induced voltage generated at a receiving coil is compared with a defined voltage range. If the induced voltage has a value outside the defined voltage range, it is indicative of the presence of slag. The voltage range is defined in dependence of the flow of molten metal passing through the shroud. A casting plant is also provided.
Claims27
A method of detecting the presence of slag in a shroud for guiding molten metal from a ladle to a tundish, the method comprising:
- generating, by means of at least one transmitting coil, an electromagnetic field that enters the shroud and its contents;
- generating an induced voltage by means of at least one receiving coil which is subjected to the electromagnetic field having entered the shroud and its contents, wherein any induced voltage having a value outside a defined voltage range is indicative of the presence of slag in said contents;
- determining the flow of the molten metal passing through the shroud;
- and
- defining said voltage range depending on the magnitude of the determined flow of molten metal.
A device for detecting the presence of slag in a shroud for guiding molten metal from a ladle to a tundish, comprising:
- at least one transmitting coil for generating an electromagnetic field to be entered into the shroud and its contents;
- at least one receiving coil for receiving the electromagnetic field that has entered the shroud and its contents, and for generating an induced voltage, wherein any induced voltage having a value outside a defined voltage range is indicative of the presence of slag in said contents;
- means for determining the flow of the molten metal passing through the shroud;
- and
- means for defining said voltage range depending on the magnitude of the measured flow.
Dependencies are inferred from the claim text.