Process for measuring the level of metal in vessels, especially in continuous casting molds
AssigneeARBED Acieries Reunies de Burbach-Eich-Dudelange, Societe Anonyme
InventorFranz-Rudolf Block
Life of this patent
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Abstract
A method of measuring the level of molten metal in a continuous casting m comprises inducing in the molten metal a magnetic field by a primary electrically energized coil and, by the relationship of this magnetic field to a pair of symmetrical secondary coils coaxial with the primary coil, inducing voltages in these secondary coils which are electrically connected in a circuit opposition so that the resultant voltage represents the level of the molten metal.
Claims12
A method of detecting the level of the top of a column of molten metal in a continuous casting mold which comprises the steps of:
- surrounding the column with a primary coil and energizing the primary coil with an electric current to induce a magnetic field within the column;
- disposing a pair of symmetrical secondary coils in a coaxial relationship with said primary coil and connecting said secondary coils in a circuit opposition whereby secondary currents are induced in said secondary coils by said magnetic field;
- and
- detecting the resultant voltage induced in said secondary coils, thereby deriving a value representing the position of the top of said column with respect to a plane of symmetry of said secondary coils and hence an asymmetrical orientation of said column relative to said secondary coils.
An apparatus for measuring the height of the top of the column of molten metal in a continuous casting ingot mold, said apparatus comprising:
- a primary coil to induce a magnetic field in said column;
- a pair of secondary coils surrounding said column and disposed coaxially with one another and with said primary coil and symmetrically while being connected in a circuit opposition, said magnetic field inducing currents in said secondary coils which are a function of the position of said column relative to said secondary coils;
- and
- means for deriving from said secondary coils a resultant voltage representing an asymmetrical position of said column with respect to the secondary coils thereby providing a value representing the height of the top of said column.
Dependencies are inferred from the claim text.