Temperature measuring system and method for on-line measurement of molten steel temperature in steelmaking process of electric-arc furnace

Abstract

The invention belongs to the field of steelmaking process of an electric-arc furnace and relates to a temperature measurement system and method for on-line measurement of molten steel temperature in the steelmaking process of the electric-arc furnace. A device comprises a control system, an air supply system and a collection system; the method includes the steps that a spray gun throat on the furnace wall of the electric-arc furnace serves as a measurement window of an infrared temperature measurement device, supersonic gas jet generated when temperature measurement gas is sprayed and blown through a spray gun on the furnace wall of the electric-arc furnace is utilized to discharge smoke-containing furnace gas in the hearth, a foam slag layer on the surface of molten steel is penetrated through, a stable molten steel temperature feature signal transmission channel is established between the molten steel and a sensor, and continuous or intermittent one-line measurement of the temperature of the molten steel in the furnace is achieved in the steelmaking process of the electric-arc furnace. The temperature measurement system and method are applicable to molten steel temperature detection in the steelmaking process of the electric-arc furnace, the molten steel temperature in the steelmaking process of the electric-arc furnace can be effectively measured, the response speed of the measurement device is high, the service life is long, measurement accuracy is high, use of a temperature thermocouple is reduced, the manual temperature measurement time in the smelting process is shortened, and intelligent smelting of steelmaking of the electric-arc furnace is achieved.

Description

technical field [0001] The invention belongs to the field of electric arc furnace steelmaking, in particular to a method for continuously or discontinuously measuring the temperature of molten steel on-line during the electric arc furnace steelmaking process. Background technique [0002] Electric arc furnace steelmaking is one of the main steelmaking methods at present. The temperature of molten steel is very important for dephosphorization, decarburization, quality control and labor safety in the smelting process. Usually, the "one-time fast thermocouple" method is used to measure the temperature of molten steel in the electric arc furnace. This method is limited by the number of temperature measurements and cannot continuously monitor the change of molten steel temperature during the smelting process, which is not conducive to the optimization of the steelmaking and smelting process of the electric arc furnace. and terminal control. [0003] Conventional infrared tempera...

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Problems solved by technology

Usually, the "one-time fast thermocouple" method is used to measure the temperature of molten steel in the electric arc furnace. This method is limited by the number of temperature measurements and cannot continuously monitor the change of molten steel temperature during the smelting process, which is not conducive to the optimization of the steelmaking and smelting process of the electric arc furnace. and endpoint control

[0003] Conventional infrared temperature measurement and other non-contact temperature measurement devices are difficult to be effectively used in the smelting process of the electric arc furnace. Observation window for non-contact temperature measurement; in the process of electric arc furnace steelmaking, the furnace gas has high smoke content and poor light transmission, and the spectral signal cannot pass through stably; at the same time, the surface of the molten pool is covered with foam slag, which makes it impossible to measure the temperature of molten steel

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