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

A molten steel temperature and electric arc furnace technology, which is applied in the field of electric arc furnace steelmaking, can solve the problems of limited number of temperature measurements, inability to stably pass through the spectral signal, and high content of smoke and dust in the furnace gas, and achieve the effect of ensuring accuracy.

Active Publication Date: 2016-03-02
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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

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example 1

[0050] The present invention is applied in 100-ton electric arc furnace steelmaking. The position of the spray gun on the wall of the electric arc furnace is 60° from the horizontal plane. It is smelted with a ratio of 50% molten iron. The Mach number of the nozzle is 2 and the gas flow rate is 2500m. 3 / h, pressure 0.8MPa, a total of 4 furnace wall spray guns (No. 1~4) (such as image 3 shown), wherein No. 4 furnace wall spray gun is installed according to the transformation of the present invention, and the temperature measuring gas adopts N 2 , The transparent protective glass is made of pressure-resistant transparent quartz glass, the purge gas is air, the furnace wall spray gun of the electric arc furnace adopts a cluster jet spray gun, and the infrared temperature measuring device adopts an infrared thermometer. The molten steel temperature measurement in the smelting process adopts the online discontinuous measurement mode of molten steel temperature, which specifically...

example 2

[0060] The present invention is applied in 150-ton electric arc furnace steelmaking. The position of the spray gun on the electric arc furnace wall and the horizontal plane are installed at 60°. It is smelted with 100% solid metal material. The Mach number of the nozzle is 2 and the gas flow rate is 3000m 3 / h, pressure 0.8MPa, a total of 4 furnace wall spray guns (No. 1~4), wherein No. 4 furnace wall spray guns are rebuilt and installed according to the present invention, and the temperature measuring gas adopts N 2 , The transparent protective glass is pressure-resistant transparent quartz glass, the purge gas is air, the electric arc furnace wall spray gun is a supersonic gun, and the infrared temperature measurement device is an infrared thermal imager. The molten steel temperature measurement in the smelting process adopts the online continuous measurement mode of molten steel temperature, which specifically includes the following contents:

[0061] During the smelting pr...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/52
CPCC21C5/52C21C2005/5288Y02P10/20
Inventor 朱荣魏光升董凯刘润藻马国宏王云胡绍岩程挺苏荣芳王洪朱长富
Owner UNIV OF SCI & TECH BEIJING
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