阅读说明：本技术 一种转炉炼钢倒炉时非接触式的钢水温度检测方法 (Non-contact molten steel temperature detection method during converter steelmaking and converter reversing ) 是由 雷家柳 胡志刚 陈跃 赵栋楠 廖庆铃 于 2019-09-24 设计创作，主要内容包括：本发明公开了一种转炉炼钢倒炉时非接触式的钢水温度检测方法,包括转炉,检测方法步骤如下：红外摄像机将连续拍摄的图像信息传输至计算机系统,由计算机识别拍摄识别钢水和钢渣的分界轮廓线,利用热像测温的方法对所有区域的温度场进行识别,显示出钢液区域的最高温度作为钢水温度。与现有技术相比,本发明的有益效果如下：采用非接触的方式检测转炉倒炉期间炉内钢水温度的功能,温度检测精度±0.1℃；采用热像非接触的方式进行测温,安全便捷,无需消耗测温探头,检测成本低,可实现连续的温度检测和温度曲线的实时显示,温度检测区间和范围更大；非接触式测温方法比传统的电偶测温方法,速度要快20秒,能提高转炉冶炼效率和生产产量。(The invention discloses a non-contact molten steel temperature detection method during converter steelmaking and converter dumping, which comprises a converter, and comprises the following steps: the infrared camera transmits the continuously shot image information to the computer system, the computer identifies, shoots and identifies the boundary contour lines of the molten steel and the steel slag, the thermal imagery temperature measurement method is utilized to identify the temperature fields of all the areas, and the highest temperature of the molten steel area is displayed as the molten steel temperature. Compared with the prior art, the invention has the following beneficial effects: the function of detecting the temperature of molten steel in the converter during the converter turnover by adopting a non-contact mode, wherein the temperature detection precision is +/-0.1 ℃; the temperature measurement is carried out in a thermal image non-contact mode, the safety and convenience are realized, a temperature measurement probe is not required to be consumed, the detection cost is low, the continuous temperature detection and the real-time display of a temperature curve can be realized, and the temperature detection interval and range are larger; compared with the traditional galvanic couple temperature measurement method, the non-contact temperature measurement method has the advantages that the speed is 20 seconds faster, and the smelting efficiency and the production yield of the converter can be improved.)

1. A non-contact molten steel temperature detection method during converter steelmaking and converter turning comprises a converter, and is characterized in that an infrared camera is installed right above a converter mouth of the converter and connected with a computer system installed in an operating chamber of the converter, and the detection method comprises the following steps:

a. the lens of the infrared camera is over against the position of the converter tap hole, and the camera can acquire the boundary line between the molten steel and the steel slag in the converter and the converter wall by adjusting the lens angle and the installation height of the infrared camera;

b. when a converter molten steel smelting task is completed and converter-reversing temperature measurement is prepared, a computer system in a converter operating room acquires converter-reversing information by judging the change of the converter tilting angle;

c. controlling an infrared camera to continuously shoot the molten steel during the converter turning period through a computer system;

d. the infrared camera transmits the continuously shot image information to a computer system, the computer identifies, shoots and identifies the boundary contour lines of the molten steel and the steel slag, the thermal imagery temperature measurement method is utilized to identify the temperature fields of all areas, the highest temperature of the molten steel area is displayed as the molten steel temperature, and the detected temperature is displayed on a computer interface and a temperature measuring instrument in a data and continuous curve mode;

e. when the computer system judges that the converter-reversing action is finished, the converter returns to the original smelting position, and the computer system controls the infrared camera to stop working.

2. The non-contact molten steel temperature detection method during converter steelmaking converter reversing according to claim 1, characterized in that the temperature detection range of the infrared camera is 400-.

3. The method as claimed in claim 1, wherein a compressed air purging device is mounted at a lens of the infrared camera, the compressed air purging device comprises a compressed air connecting pipe and an external compressed air pump, a water cooling system is used inside the lens of the infrared camera to cool the equipment and the lens, and the water cooling system comprises a water cooling circulating pipe and an external circulating water pump.

4. The method as claimed in claim 3, wherein the compressed air pressure is in the range of 0.1-0.5 MPa; the pressure range of cooling water in the lens is 0.2-0.5 Mpa; and the compressed air blowing device and the water cooling system of the infrared camera are kept in a 24-hour normally-open state.

5. The method for detecting the non-contact molten steel temperature during converter steelmaking converter according to claim 1, wherein the infrared camera is connected with the computer system in a network connection mode, a USB (universal serial bus) line mode or a serial port mode.

6. The method as claimed in claim 1, wherein the computer system identifies boundary contour lines of molten steel and steel slag based on image information processing technology.

Technical Field

The invention relates to a method for detecting the temperature of molten steel, in particular to a non-contact method for detecting the temperature of molten steel during converter steelmaking and converter dumping.

Background

The steel-making process generally needs to adopt a converter or an electric furnace to smelt molten steel, the temperature of the molten steel is an important parameter for judging whether the molten steel is qualified, different steel types have strict requirements on tapping temperature, and a serious person needs to return to the converter to smelt again for an improper tapping temperature, and a non-serious person can also have adverse effects on the quality of the molten steel.

Generally, most of converters with more than 200t are provided with sublance systems, so that the sublance systems can be used for temperature measurement and sampling without reversing the converter, and for converters without the sublance systems, the converter needs to be reversed after molten steel is smelted, namely, the converter is rotated from a vertical state to a state that an included angle between the axis of the converter and the ground plane is 15-35 degrees, so that the surface of the molten steel is inclined, the temperature measurement operation is convenient, and the temperature measurement gun can be inserted into a converter mouth manually or by a manipulator for temperature measurement. At present, the steelmaking process generally adopts a disposable consumption temperature thermocouple to measure temperature, and a converter is rotated to form an included angle of about 15-35 degrees with the ground level by a converter shaker in the temperature measuring process. At the moment, the molten steel surface is closer to the furnace mouth, a steelmaking worker stretches a temperature measuring gun provided with a temperature measuring thermocouple probe into the furnace from the furnace mouth, inserts the temperature measuring gun into the liquid molten steel, pulls out the temperature measuring gun after the temperature of the molten steel is successfully detected, the furnace with qualified temperature and components can directly tap steel, the furnace with improper temperature and components needs to continue oxygen blowing smelting, and temperature measurement and sampling are carried out again until the requirements of the tapping process are met.

The current temperature measurement mode is adopted, the operations of manually installing a probe, manually inserting a temperature measurement gun and the like are generally needed, the labor intensity is high, and in the temperature measurement process, molten steel and slag are easy to splash out to hurt people and cause safety accidents; meanwhile, the contact temperature measurement method also needs to consume a large number of temperature measurement probes, and the production cost is high.

If a non-contact temperature measuring method can be adopted, the current steelmaking temperature measuring process can be optimized, the cost can be reduced, and the production safety is improved.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a non-contact molten steel temperature detection method during converter steelmaking and converter reversing.

In order to solve the technical problems, the invention provides the following technical scheme:

the invention relates to a non-contact molten steel temperature detection method during converter steelmaking and converter turning, which comprises a converter, wherein an infrared camera is installed right above a converter mouth of the converter, the infrared camera is connected with a computer system installed in an operating chamber of the converter, and the detection method comprises the following steps:

a. the lens of the infrared camera is over against the position of the converter tap hole, and the camera can acquire the boundary line between the molten steel and the steel slag in the converter and the converter wall by adjusting the lens angle and the installation height of the infrared camera;

b. when a converter molten steel smelting task is completed and converter-reversing temperature measurement is prepared, a computer system in a converter operating room acquires converter-reversing information by judging the change of the converter tilting angle;

c. controlling an infrared camera to continuously shoot the molten steel during the converter turning period through a computer system;

d. the infrared camera transmits the continuously shot image information to a computer system, the computer identifies, shoots and identifies the boundary contour lines of the molten steel and the steel slag, the thermal imagery temperature measurement method is utilized to identify the temperature fields of all areas, the highest temperature of the molten steel area is displayed as the molten steel temperature, and the detected temperature is displayed on a computer interface and a temperature measuring instrument in a data and continuous curve mode;

e. when the computer system judges that the converter-reversing action is finished, the converter returns to the original smelting position, and the computer system controls the infrared camera to stop working.

As a preferred technical scheme of the invention, the temperature detection range of the infrared camera is 400-2000 ℃, the field angle of the lens is 10-50 degrees, and the distance between the infrared camera and the converter mouth is 10-30 meters.

As a preferred technical scheme of the invention, a compressed air purging device is installed at the position of a lens of the infrared camera, the compressed air purging device comprises a compressed air connecting pipe and an external compressed air pump, a water cooling system is adopted inside the lens of the infrared camera to cool equipment and the lens, and the water cooling system comprises a water cooling circulating pipe and an external circulating water pump.

As a preferred technical scheme of the invention, the pressure range of the compressed air is 0.1-0.5 Mpa; the pressure range of cooling water in the lens is 0.2-0.5 Mpa; and the compressed air blowing device and the water cooling system of the infrared camera are kept in a 24-hour normally-open state.

As a preferred technical scheme of the invention, the infrared camera is connected with the computer system in a network mode, a USB mode or a serial port mode.

As a preferred technical scheme of the invention, the computer system identifies the boundary contour lines of the molten steel and the steel slag based on an image information processing technology.

Compared with the prior art, the invention has the following beneficial effects:

(1) the function of detecting the temperature of the molten steel in the converter during the converter tilting period in a non-contact mode is adopted, and the temperature detection precision is +/-0.1 ℃.

(2) The thermal imaging non-contact mode is adopted for temperature measurement, safety and convenience are realized, a temperature measuring probe is not required to be consumed, the detection cost is low, continuous temperature detection and real-time display of a temperature curve can be realized, and the temperature detection interval and range are larger.

(3) Compared with the traditional galvanic couple temperature measurement method, the non-contact temperature measurement method has the advantages that the speed is 20 seconds faster, and the smelting efficiency and the production yield of the converter can be improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic diagram of the frame construction of the present invention;

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.