A strand casting installation in which a conicity of a die is set during a casting procedure by measuring temperature values along a centric measuring path running in a casting direction along an adjustably disposed die wall; measuring temperature values along a peripheral measuring path running in a casting direction along the adjustably disposed die wall, wherein the peripheral measuring path runs between the centric measuring path and a lateral periphery of the die wall, and a spacing of the peripheral measuring path from the lateral periphery of the die wall is smaller than a spacing of the centric measuring path from the other lateral periphery of the die wall; determining a centric temperature distribution curve along the centric measuring path from the temperature values measured along the centric measuring path; determining a peripheral temperature distribution curve along the peripheral measuring path from the temperature values measured along the peripheral measuring path; determining a first area under the centric temperature distribution curve, and a second area under the peripheral temperature distribution curve; determining a difference between the second area and the first area; and setting the conicity of the die taking into account the difference.

A heat transfer coefficient between a solidified shell (2) and a mold (4) sandwiching a mold flux layer (3), and a heat transfer coefficient between a molten steel (1) and the solidified shell (2) are found by solving an inverse problem by using data from thermocouples (6), and a solidified shell thickness and a solidified shell temperature are estimated (solidified state in mold estimation amounts), and further, solidified state in mold evaluation amounts are obtained. It is determined whether a normal casting state or an abnormal casting state by comparing at least one or more kinds of amounts contained in the solidified state in mold estimation amounts and the solidified state in mold evaluation amounts with allowable limit values which are found based on at least one or more kinds of amounts contained in the solidified state in mold estimation amounts and the solidified state in mold evaluation amounts when the abnormal casting occurred in a past and stored in a data storage part.

A method for setting a conicity of a die of a strand casting installation during a casting procedure, including the steps of: measuring temperature values along a centric measuring path running in a casting direction along an adjustably disposed die wall; measuring temperature values along a peripheral measuring path running in a casting direction along the adjustably disposed die wall, wherein the peripheral measuring path runs between the centric measuring path and a lateral periphery of the die wall, and a spacing of the peripheral measuring path from the lateral periphery of the die wall is smaller than a spacing of the centric measuring path from the other lateral periphery of the die wall; determining a centric temperature distribution curve along the centric measuring path from the temperature values measured along the centric measuring path; determining a peripheral temperature distribution curve along the peripheral measuring path from the temperature values measured along the peripheral measuring path; determining a first area under the centric temperature distribution curve, and a second area under the peripheral temperature distribution curve; determining a difference between the second area and the first area; and setting the conicity of the die taking into account the difference.

Mould provided with a detection system of the level a liquid metal within a crystallizer of the mould in which the detection system is based on the transmission of at least one detection signal transmitted towards the crystallizer and a phase of reception of at least one received measuring signal dependent on the transmitted detection signal and mould and continuous casting machine provided with said mould.

A system of detection of a temperature of a crystallizer or a level of liquid metal in the crystallizer has a sensor positioned within a mould of the crystallizer. The sensor has a case, a closing cover positioned at a detection face of the case, a plurality of ultrasonic elements arranged in vertically spaced relation to a length of the case, and a plurality of attenuation elements positioned sideways with respect to the closing cover. The plurality of ultrasonic elements include a first ultrasonic element, a second ultrasonic element and a third ultrasonic element positioned in orthogonal relation to the length of the sensor. The plurality of ultrasonic elements transmit and receive ultrasonic waves.

A mold used in continuous steel casting includes a plurality of mold copper plates. At least one of the plurality of mold copper plates has an optical fiber temperature sensor embedded therein across a width direction of the mold copper plate at at least two different levels in a casting direction.