Abstract: A device for measuring the temperature of a bath of metal contains a sleeve and an optical head. The sleeve and optical head may be joined together or taken apart by rotation with respect to each other. The sleeve is made at least partially of a refractory material. A method for measuring the temperature of a bath of molten metal makes use of the inventive device. By virtue of this device, mounting and removal is rendered easier while keeping the measuring zone centered and decreasing measurement disturbances caused by the emission of gas from the sleeve.

Abstract: A device for measuring the temperature of a bath of metal contains a sleeve and an optical head. The sleeve and optical head may be joined together or taken apart by rotation with respect to each other. The sleeve is made at least partially of a refractory material. A method for measuring the temperature of a bath of molten metal makes use of the inventive device. By virtue of this device, mounting and removal is rendered easier while keeping the measuring zone centered and decreasing measurement disturbances caused by the emission of gas from the sleeve.

Abstract: A device for measuring the thickness of slag on the surface of liquid metal contained in an ingot mould comprises a wire made of electrically conductive material and capable of being eliminated under the effect of the heat at the temperature of the slag, the wire having a free end able to be dipped into the slag, a wire feeder capable of displacing the wire so that its free end dips vertically into the slag according to a predetermined trajectory, a wire displacement measurer capable of measuring a distance travelled by the free end of the wire during a time interval between two predetermined events when the latter is displaced under the action of the feeding means, and a wire feeder controller having a molten metal contact detector capable of detecting contact between the free end and the surface of the liquid metal.

Abstract: A device for measuring the thickness of slag on the surface of liquid metal contained in an ingot mould comprises a wire made of electrically conductive material and capable of being eliminated under the effect of the heat at the temperature of the slag, the wire having a free end able to be dipped into the slag, a wire feeder capable of displacing the wire so that its free end dips vertically into the slag according to a predetermined trajectory, a wire displacement measurer capable of measuring a distance travelled by the free end of the wire during a time interval between two predetermined events when the latter is displaced under the action of the feeding means, and a wire feeder controller having a molten metal contact detector capable of detecting contact between the free end and the surface of the liquid metal.

Abstract: A sensor for measuring the surface level of a liquid phase metal includes an air excitation coil and lower and upper air reception coils. Excitation coil is perpendicular to an upper surface of an ingot mold and powered by a current for generating a magnetic field. Magnetic field lines propagate along upper field lines away from the ingot mold and along lower field lines covering the upper surface and the molten metal surface. Lower air coil is parallel to the excitation coil, whereby an induced voltage is generated by the lower field lines, the latter being modified by varying the level of the metal surface. Upper air coil is parallel to the excitation coil, vertically adjacent to the lower air coil, with a shape and characteristics identical to the lower air coils. Upper field lines generate the induced voltage and are substantially free of disturbances generated by the metal surface.

Abstract: The invention relates to a sensor (1) for measuring the surface level of a liquid phase metal in a continuous casting plant including an ingot mold having an upper surface into which an opening (4), in which a liquid metal is fed, leads, characterized in that the sensor includes: an air excitation coil (7) perpendicular to the upper surface of the ingot mold and arranged near the opening, powered by a current for generating a magnetic field, the field lines of which propagate along upper field lines away from the ingot mold and along the lower field lines covering the upper surface of the ingot mold and the molten metal surface; a lower air reception coil (8) parallel to the excitation coil, in which an induced voltage is generated by the action of the lower field lines, wherein the latter can be modified by a variation in the level of the molten metal surface; and an upper air reception coil (9) parallel to the excitation coil, vertically adjacent to the lower excitation coil, and having a shape and characte

Abstract: The installation according to the invention comprises at least one mould, a vessel intended to receive the liquid metal and means for directly determining the evolution of the level of molten metal in the impression of the mould. These determination means comprise means for detecting the presence of this liquid metal in the impression, particularly of electromagnetic nature, which are adapted to penetrate at least partially in the interior volume of this impression.

Abstract: A control assembly for controlling reciprocal motion of a stopper used with a tundish dish including a shaft movably guided within a guiding assembly and connected to the stopper and wherein a motor is movable between a first postion wherein output from the motor is disengaged from a motion converting device connected to the shaft and a second position wherein the motor is drivingly engaged with the motion converting device. A linking device is also provided to secure the motor relative to the motion converting device in the second position thereof.

Abstract: The control assembly according to the invention comprises a guiding assembly, a shaft for drive of the stopper, a motor presenting a rotary shaft, as well as means for converting the rotational movement of the motor into a movement of translation of the drive shaft.