Converter splashing forecast control and temperature measurement integrated device and method

Abstract

The invention relates to a converter splashing forecast control and temperature measurement integrated device and method, and belongs to the technical field of steelmaking devices and methods. According to the technical scheme, a thermal imager directly and continuously detects the furnace temperature in the converter on line through a visual hole via a spray gun in the whole process, splashing is detected and forecasted according to different radiation constants of high-temperature furnace gas and slag, the information of the furnace temperature and the slag is transmitted to an electrical control system of the converter, and automation of operation is achieved. When a splashing sign is detected, a powder spraying and splashing inhibiting system is automatically started, dolomite powder is blown into the furnace through a fluidized powder spraying tank, related pipelines and a spraying gun by adopting argon, and splashing is inhibited in time. According to the method, online whole-course continuous detection of the temperature of the converter is achieved, splashing can be accurately forecasted and automatically inhibited, the steelmaking process is better guided, more early warning information is provided for operators and a control system earlier, operation is optimized in time, safety of the operators and equipment is guaranteed, environmental pollution is reduced, and production efficiency is improved.

Description

Technical Field

[0001] The invention relates to an integrated device and method for converter splash prediction control and temperature measurement, belonging to the technical field of steelmaking devices and methods. Background Art

[0002] Splashing is the most frequent accident in the converter smelting process. Splashing can cause foamy slag containing a large number of metal droplets to overflow from the furnace mouth, or even erupt explosively, which not only seriously affects the production stability of the converter, increases the consumption of steel and slag materials and heat loss, causes environmental pollution, and in severe cases endangers personal and equipment safety. According to statistics, scalding accidents caused by converter splashing account for more than 80% of scalding accidents in front of the furnace; the metal loss rate caused is 0.5% to 5%. When severe splashing occurs, the loss of metal materials can even reach more than 10%; it causes the loss of molten steel temperature and slag materials, affecting the dephosphorization and desulfurization effect of the converter. The temperature control of the converter is also crucial to the stability of smelting. If the furnace temperature is not well controlled, it will affect slag, affect the normal removal of C and P, reduce the end point hit rate, and also cause splashing. The online continuous detection of the converter temperature is an effective means to achieve stable and accurate control of the furnace temperature, thereby ensuring the efficient and smooth operation of the converter smelting. Since the converter is a high-temperature, high-pressure, multi-component and multi-phase reaction vessel, there are many reasons for splashing, which makes it quite difficult to predict and control splashing. It is also very difficult to conduct online continuous detection of furnace temperature under high temperature and high pressure. This makes suppressing converter splashing and online continuous detection of furnace temperature two key common technical problems in the steel industry.

[0003] Research on converter splash prediction control and furnace temperature monitoring has been ongoing at home and abroad. First, sonar slagging technology was introduced for splash prediction, but this technology has a high accuracy for slag return prediction and a low accuracy for splash prediction. Some companies and research institutes have conducted research on flue gas analysis technology prediction and control of splashing. Relevant literature proposes to use the curve change law of CO in the furnace gas composition to predict the occurrence of splashing; Patent CN113564296B proposes that when the real-time concentration of CO in the flue gas exceeds the preset safe concentration range, an early warning message indicating converter splashing is generated. However, after the actual application of these studies, it was found that due to reasons such as characteristic curve delay, it was impossible to achieve the characterization of the online slag state and the early warning of slag overflow and splashing. In addition, inspired by the experience of steelmaking by observing the furnace mouth flame with the human eye, domestic and foreign companies have also conducted research on furnace mouth flame image recognition and splash prediction. Patents CN110309973B, CN118064668A, CN117350973A, CN117496429A and Japanese JFE Company's patent CN113661257B all proposed methods for predicting converter splashing based on mouth flame recognition. Although there are many studies on mouth flame recognition and different recognition methods have been proposed, the machine cannot fully imitate and replace the human eye, and it is difficult to recognize subtle changes in splashing feature images and the prediction model requires high requirements. At present, this type of technology is limited to the experimental research stage and cannot be applied to actual production. For the monitoring of converter temperature, current research mainly focuses on the use of mathematical models to calculate the molten pool temperature. Relevant literature proposes to use the temperature model in the flue gas analysis technology to predict and monitor the molten pool temperature, but the flue gas analysis detects the composition of the gas in the flue outside the furnace, which is lagging and different from the actual situation in the furnace. Therefore, the temperature model established based on this is mostly an indirect prediction model. In addition, the influence of the instability of raw materials means that the molten pool temperature predicted by this technology is deviated from the actual situation. Although the auxiliary gun technology can detect the temperature of the converter molten pool, it only detects at a certain point in time and does not achieve continuous detection. There are few public and reported online continuous monitoring technologies for converter furnace temperature. Therefore, in order to effectively predict and control converter splashing and furnace temperature, ensure the safety of personnel and equipment, reduce environmental pollution, ensure efficient and smooth smelting, improve production efficiency, and improve economic and technical indicators, it is urgent to find an effective method to achieve splashing prediction and control, as well as online continuous detection of furnace temperature. Summary of the invention

[0004] The object of the present invention is to provide an integrated device and method for predicting and controlling splashing and measuring temperature of a converter. By integrating a thermal imager and a spray gun and adopting a thermal imager to continuously detect the converter temperature online throughout the whole process, the occurrence of splashing can be accurately predicted and automatically suppressed, and the steelmaking process can be better guided. More early warning information can be provided to operators and control systems earlier, and operations can be optimized in time to ensure the safety of personnel and equipment, reduce environmental pollution, promote good slag and efficient dephosphorization, ensure efficient and smooth smelting, improve production efficiency, improve the technical and economic indicators of the converter, and effectively solve the above-mentioned problems existing in the background technology.

[0005] The technical solution of the present invention is: a converter splash prediction control and temperature measurement integrated device, comprising a viewing hole, a pneumatic ball valve 1, a thermal imager, a pneumatic pipeline, a thermal imager signal circuit, a powder spray pipeline, a medium rotary joint, an electrical rotary joint and a powder spray splash suppression device, wherein the powder spray splash suppression device comprises a fluidized powder spray tank, a fluidized conveying pipeline and a spray gun, the viewing hole is opened on the furnace wall of the converter, the spray gun is inserted and arranged in the viewing hole, the thermal imager is installed at the rear of the spray gun, and the pneumatic ball valve 1 is arranged between the spray gun and the thermal imager; the spray gun is connected to the fluidized powder spray tank through the fluidized conveying pipeline, the fluidized powder spray tank is connected to an argon gas source, a pneumatic ball valve 2 is arranged on the fluidized conveying pipeline, and a pressure sensor and a pressure reducing valve are arranged on the connecting pipeline between the fluidized powder spray tank and the argon gas source; the pneumatic ball valve 1, the thermal imager, the pneumatic ball valve 2, the pressure sensor and the pressure reducing valve The valves are connected to the electrical control system respectively; the medium rotary joint and the electrical rotary joint are arranged in the ear shaft, and the powder spraying pipeline, the pneumatic pipeline and the thermal imager signal line are connected through the medium rotary joint and the electrical rotary joint in the ear shaft, and are connected to the spray gun, the pneumatic ball valve and the thermal imager respectively close to the furnace wall; the spray gun can rotate with the converter, the spray gun can be used for a long period of time, and does not need to be moved during the entire converter production process; the thermal imager directly detects the furnace temperature in the converter online through the visible hole of the spray gun, and uses the different radiation constants of high-temperature furnace gas and slag to detect and predict splashing, and transmits the furnace temperature and slag information to the converter electrical control system to realize automatic operation; when signs of splashing are detected, the powder spraying suppression system is automatically started, and argon gas is used to spray dolomite powder into the furnace from the fluidized powder spraying tank, related pipelines, and spray guns to timely suppress the occurrence of splashing.

[0006] The pneumatic ball valve 2, the pressure sensor, the pressure reducing valve and the electrical control system are installed outside the converter.

[0007] The spray gun is made of high-temperature resistant and long-life refractory material. A sealing cover is provided at the front of the spray gun and a box is provided at the rear. A bent pipe is pre-buried on one side of the spray gun and a straight pipe is pre-buried at the rear of the spray gun. A pneumatic ball valve and the box are connected behind the straight pipe, and a thermal imager is placed in the box at the rear of the spray gun.

[0008] The viewing hole is opened on the ear axis side of the converter, is coaxial with the ear axis, and is at a distance from the furnace mouth that meets the safety height. The viewing hole is inclined downward at an angle of 30-60 degrees.

[0009] The safety height is matched with a height that ensures that splashing tendency is discovered and there is sufficient reaction time to suppress splashing.

[0010] The gas used in the gas source is argon.

[0011] A converter splash prediction control and temperature measurement integrated method comprises the following steps: (1) Connect a thermal imager to the rear of the spray gun, and set a pneumatic ball valve between the spray gun and the thermal imager; (2) A visual hole is opened on the furnace wall on the converter trunnion side; (3) Insert the spray gun into the visible hole, set the medium rotary joint and the electrical rotary joint in the trunnion, connect the powder spraying pipeline, the pneumatic pipeline and the thermal imager signal line through the medium rotary joint and the electrical rotary joint, and connect them to the spray gun, the pneumatic ball valve and the thermal imager close to the furnace wall, so that the spray gun can rotate with the converter. The long-life spray gun adopts high-temperature resistant and long-life refractory materials, can be used for a long period of time, and does not need to be moved during the entire converter production process; (4) The thermal imager detects the furnace temperature in the converter directly and continuously online through the viewing hole via the spray gun, and uses the different radiation constants of high-temperature furnace gas and slag to detect and predict splashing, and transmits the furnace temperature and slag information to the electrical control system; (5) When signs of splashing are detected, the electrical control system starts the powder spraying and splashing suppression device, using argon gas to spray dolomite powder into the furnace to suppress the occurrence of splashing in time.

[0012] In the step (2), a visual hole is opened on the converter trunnion side, coaxial with the trunnion and at a certain safety height Ha from the furnace mouth, and the visual hole is inclined downward by 30-60 degrees; the safety height must ensure that splashing tendency is detected and there is sufficient reaction time to suppress splashing. The calculation method of the safety height Ha is as follows: Ha=Hn×K Where: Hn—converter height; K—Safety factor, take 0.15-0.25.

[0013] In the step (3), after the converter is repaired and before the converter is opened, the spray gun is inserted into the viewing hole by 200-290 mm, and the front sealing cover of the spray gun covers the viewing hole to keep the thermal imager away from the high temperature area as much as possible.

[0014] In the step (4), when the converter starts blowing, a pneumatic ball valve 1 on the spray gun pipeline in front of the thermal imager is opened, and the temperature in the furnace is measured by the thermal imager. The thermal imager detection radiation constant is set to the radiation constant of the furnace gas. When slag appears in the visible hole area, the thermal imager detection shows that the temperature of the slag area exceeds the detection radiation constant, and the size of the slag area within the visible hole range is identified. When the slag area exceeds 1 / 2 to 2 / 3 of the visible hole area, splashing is about to occur.

[0015] In the step (5), while closing the pneumatic ball valve 1 in front of the thermal imager, the pneumatic ball valve 2 and the pressure reducing valve are opened, and 8.5-9.5 kg of high-pressure gas is used to allow the dolomite powder to enter the spray gun from the fluidized powder spray tank through the fluidized conveying pipeline and the elbow, and then be sprayed into the converter through the visible hole through the spray gun. The amount of dolomite powder sprayed is 0.45-0.55 kg / t steel.

[0016] The beneficial effects of the present invention are as follows: by integrating the thermal imager and the spray gun, the thermal imager is used to continuously detect the converter temperature online throughout the entire process, the occurrence of splashing can be accurately predicted and automatically suppressed, and the steelmaking process can be better guided, more early warning information can be provided to operators and control systems earlier, operations can be optimized in a timely manner, the safety of personnel and equipment can be guaranteed, environmental pollution can be reduced, good slagging and efficient dephosphorization can be promoted, efficient and smooth smelting can be ensured, production efficiency can be improved, and the technical and economic indicators of the converter can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; In the figure: visual hole 1, spray gun 2, pneumatic ball valve 1 3, thermal imager 4, pneumatic pipeline 5, thermal imager signal circuit 6, powder spray pipeline 7, medium rotary joint 8, ear shaft 9, pneumatic ball valve 2 10, fluidized powder spray tank 11, pressure sensor 12, pressure reducing valve 13, air source 14, electrical rotary joint 15, converter 16. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the invention implementation cases clearer, the technical solutions in the implementation cases of the present invention will be clearly and completely described below in conjunction with the drawings in the implementation cases. Obviously, the implementation cases described are only a small part of the implementation cases of the present invention, rather than all the implementation cases. Based on the implementation cases in the present invention, all other implementation cases obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] A converter splash prediction control and temperature measurement integrated device, comprising a visual hole 1, a pneumatic ball valve 3, a thermal imager 4, a pneumatic pipeline 5, a thermal imager signal circuit 6, a powder spray pipeline 7, a medium rotary joint 8, an electrical rotary joint 15 and a powder spray splash suppression device, wherein the powder spray splash suppression device comprises a fluidized powder spray tank 11, a fluidized conveying pipeline and a spray gun 2, the visual hole 1 is opened on the furnace wall of the converter 16, and the spray gun 2 is inserted into the visual hole 1 , the thermal imager 4 is installed at the rear of the spray gun 2, and the pneumatic ball valve 13 is arranged between the spray gun 2 and the thermal imager 4; the spray gun 2 is connected to the fluidized powder spray tank 11 through the fluidized delivery pipeline, the fluidized powder spray tank 11 is connected to the argon source 14, the fluidized delivery pipeline is provided with a pneumatic ball valve 10, and the connecting pipeline between the fluidized powder spray tank 11 and the argon source 14 is provided with a pressure sensor 12 and a pressure reducing valve 13; the pneumatic ball valve 13, the thermal imager 4, the pneumatic ball valve 10, The pressure sensor 12 and the pressure reducing valve 13 are connected to the electrical control system respectively; the medium rotary joint 8 and the electrical rotary joint 15 are arranged in the ear shaft 9, and the powder spraying pipeline 7, the pneumatic pipeline 5 and the thermal imager signal line 6 are connected through the medium rotary joint 8 and the electrical rotary joint 15 in the ear shaft 9, and are connected to the spray gun 2, the pneumatic ball valve 3 and the thermal imager 4 respectively close to the furnace wall; the spray gun can rotate with the converter, and the spray gun can be used for a long period of time without being moved during the entire converter production process; the thermal imager directly detects the furnace temperature in the converter online through the visible hole of the spray gun, and uses the different radiation constants of high-temperature furnace gas and slag to detect and predict splashing, and transmits the furnace temperature and slag information to the converter electrical control system to realize the automation of operation; when signs of splashing are detected, the powder spraying suppression system is automatically started, and argon gas is used to spray dolomite powder into the furnace through the fluidized powder spraying tank, related pipelines, and spray guns to timely suppress the occurrence of splashing.

[0020] The pneumatic ball valve 10 , the pressure sensor 12 , the pressure reducing valve 13 and the electrical control system are installed outside the converter 16 .

[0021] The spray gun 2 is made of high-temperature resistant and long-life refractory material. A sealing cover is provided at the front of the spray gun 2 and a box is provided at the rear. A bent pipe is pre-buried on one side of the spray gun 2 and a straight pipe is pre-buried at the rear of the spray gun 2. A pneumatic ball valve 3 and the box are connected behind the straight pipe, and a thermal imager 4 is placed in the box at the rear of the spray gun 2.

[0022] The visible hole 1 is opened on the trunnion side of the converter 16, coaxial with the trunnion 9, and the distance from the furnace mouth meets the safety height. The visible hole 1 is inclined downward at an angle of 30-60 degrees.

[0023] The safety height is matched with a height that ensures that a splashing tendency is discovered and that there is sufficient reaction time to suppress the splashing.

[0024] The gas used in the gas source is argon.

[0025] A converter splash prediction control and temperature measurement integrated method comprises the following steps: (1) Connect a thermal imager to the rear of the spray gun, and set a pneumatic ball valve between the spray gun and the thermal imager; (2) A visual hole is opened on the furnace wall on the converter trunnion side; (3) Insert the spray gun into the visible hole, set the medium rotary joint and the electrical rotary joint in the trunnion, connect the powder spraying pipeline, the pneumatic pipeline and the thermal imager signal line through the medium rotary joint and the electrical rotary joint, and connect them to the spray gun, the pneumatic ball valve and the thermal imager close to the furnace wall, so that the spray gun can rotate with the converter. The long-life spray gun adopts high-temperature resistant and long-life refractory materials, can be used for a long period of time, and does not need to be moved during the entire converter production process; (4) The thermal imager detects the furnace temperature in the converter directly and continuously online through the viewing hole via the spray gun, and uses the different radiation constants of high-temperature furnace gas and slag to detect and predict splashing, and transmits the furnace temperature and slag information to the electrical control system; (5) When signs of splashing are detected, the electrical control system starts the powder spraying and splashing suppression device, using argon gas to spray dolomite powder into the furnace to suppress the occurrence of splashing in time.

[0026] In the step (2), a visual hole is opened on the converter trunnion side, coaxial with the trunnion and at a certain safety height Ha from the furnace mouth, and the visual hole is inclined downward by 30-60 degrees; the safety height must ensure that splashing tendency is detected and there is sufficient reaction time to suppress splashing. The calculation method of the safety height Ha is as follows: Ha=Hn×K Where: Hn—converter height; K—Safety factor, take 0.15-0.25.

[0027] In the step (3), after the converter is repaired and before the converter is opened, the spray gun is inserted into the viewing hole by 200-290 mm, and the front sealing cover of the spray gun covers the viewing hole to keep the thermal imager away from the high temperature area as much as possible.

[0028] In the step (4), when the converter starts blowing, a pneumatic ball valve 1 on the spray gun pipeline in front of the thermal imager is opened, and the temperature in the furnace is measured by the thermal imager. The thermal imager detection radiation constant is set to the radiation constant of the furnace gas. When slag appears in the visible hole area, the thermal imager detection shows that the temperature of the slag area exceeds the detection radiation constant, and the size of the slag area within the visible hole range is identified. When the slag area exceeds 1 / 2 to 2 / 3 of the visible hole area, splashing is about to occur.

[0029] In the step (5), while closing the pneumatic ball valve 1 in front of the thermal imager, the pneumatic ball valve 2 and the pressure reducing valve are opened, and 8.5-9.5 kg of high-pressure gas is used to allow the dolomite powder to enter the spray gun from the fluidized powder spray tank through the fluidized conveying pipeline and the elbow, and then be sprayed into the converter through the visible hole through the spray gun. The amount of dolomite powder sprayed is 0.45-0.55 kg / t steel. Example 1

[0030] On the converter trunnion side, a viewing hole is opened at a certain safety height from the furnace mouth, coaxial with the trunnion. The viewing hole is inclined downward at 60°. The converter height is 12.9m, and the safety factor K is 0.25. The safety height of the viewing hole from the furnace mouth is selected as Ha=Hn×K=12.9×0.25=3.2m. After the converter is repaired and before the furnace is opened, the spray gun is inserted into the viewing hole 200mm to keep the thermal imager away from the high temperature area as much as possible.

[0031] The steel grade smelted in a certain batch of converter is IF steel, and argon is used as the injection gas.

[0032] When the converter starts blowing, open the pneumatic ball valve 1 on the spray gun pipeline in front of the thermal imager, use the thermal imager to measure the temperature in the furnace, set the thermal imager detection radiation constant to the radiation constant of the furnace gas, and detect that the temperature of the high-temperature furnace gas is 1400℃ in the early stage of smelting. As the smelting progresses, the thermal imager detects that the furnace temperature in the visible hole area appears in the 1760℃ area. Since the radiation constant of the furnace gas is less than the radiation constant of the slag, it means that foamed slag appears in the visible hole area. At this time, the size of the slag area within the visible hole range is identified by the computer system, and it is found that the slag area exceeds 2 / 3 of the visible hole area, indicating that the slag in the furnace has been seriously foamed and has risen to the position of the visible hole, and splashing is about to occur; At this time, the electrical control system closes the pneumatic ball valve 1 in front of the thermal imager, opens the pneumatic ball valve 2 and the pressure reducing valve of the dolomite powder injection pipeline, starts the powder injection device, and uses 8.5 kg of high-pressure gas to spray dolomite powder into the converter through the visible hole through the spray gun. The injection amount is 0.45 kg / t steel. After the dolomite powder is blown into the furnace, the continuity of the slag foam is destroyed, the slag is thickened, and the degree of foaming of the slag is quickly reduced, thereby achieving the purpose of suppressing splashing. Example 2

[0033] On the converter trunnion side, a viewing hole is opened on the furnace wall at a certain safety height from the furnace mouth, coaxial with the trunnion. The viewing hole is inclined downward at 30°. The converter height is 12.9m, and the safety factor K is 0.15. The safety height of the viewing hole from the furnace mouth is selected as Ha=Hn×K=12.9×0.15=1.9m. After the converter is repaired and before the furnace is opened, the spray gun is inserted into the viewing hole 290mm to keep the thermal imager away from the high temperature area as much as possible.

[0034] The steel grade smelted in a certain batch of converter is pipeline steel X65M, and argon is used as the injection gas.

[0035] When the converter starts blowing, open the pneumatic ball valve 1 on the spray gun pipeline in front of the thermal imager, use the thermal imager to measure the temperature in the furnace, set the thermal imager detection radiation constant to the radiation constant of the furnace gas, and detect that the temperature of the high-temperature furnace gas is 1700℃ in the later stage of smelting. As the smelting progresses, the thermal imager detects that the furnace temperature in the visible hole area appears in the 1780℃ area. Since the radiation constant of the furnace gas is less than the radiation constant of the slag, it means that foamed slag appears in the visible hole area. At this time, the size of the slag area within the visible hole range is identified by the computer system, and it is found that the slag area exceeds 1 / 2 of the visible hole area, indicating that the slag in the furnace has been seriously foamed and has risen to the position of the visible hole, and splashing is about to occur; At this time, the electrical control system closes the pneumatic ball valve in front of the thermal imager, opens the pneumatic ball valve and pressure reducing valve of the dolomite powder injection pipeline, starts the powder injection device, and uses 9.5 kg of high-pressure gas to spray dolomite powder into the converter through the visible hole through the spray gun. The injection amount is 0.55 kg / t steel. After the dolomite powder is blown into the furnace, it destroys the continuity of the slag foam, thickens the slag, and then quickly reduces the degree of foaming of the slag, thereby achieving the purpose of suppressing splashing.

[0036] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A converter splash prediction control and temperature measurement integrated device, characterized in that: The invention comprises a viewing hole (1), a pneumatic ball valve (3), a thermal imager (4), a pneumatic pipeline (5), a thermal imager signal circuit (6), a powder spraying pipeline (7), a medium rotary joint (8), an electrical rotary joint (15) and a powder spraying splash suppression device, wherein the powder spraying splash suppression device comprises a fluidized powder spraying tank (11), a fluidized conveying pipeline and a spray gun (2), the viewing hole (1) is opened on the furnace wall of the converter (16), the spray gun (2) is inserted into the viewing hole (1), and the thermal imager (4) is installed on the spray gun (11). At the rear of the gun (2), a pneumatic ball valve (3) is arranged between the spray gun (2) and the thermal imager (4); the spray gun (2) is connected to the fluidized powder spray tank (11) through a fluidized delivery pipeline, the fluidized powder spray tank (11) is connected to an argon gas source (14), a pneumatic ball valve (2) (10) is arranged on the fluidized delivery pipeline, and a pressure sensor (12) and a pressure reducing valve (13) are arranged on the connecting pipeline between the fluidized powder spray tank (11) and the argon gas source (14); the pneumatic ball valve (3), the thermal imager (4), and the pneumatic ball valve The second (10), the pressure sensor (12) and the pressure reducing valve (13) are respectively connected to the electrical control system; the medium rotary joint (8) and the electrical rotary joint (15) are arranged in the ear shaft (9); the powder spraying pipeline (7), the pneumatic pipeline (5) and the thermal imager signal line (6) are connected through the medium rotary joint (8) and the electrical rotary joint (15) in the ear shaft (9), and are respectively connected to the spray gun (2), the pneumatic ball valve one (3) and the thermal imager (4) close to the furnace wall; the spray gun can rotate with the converter, The spray gun can be used for a long period of time and does not need to be moved during the entire converter production process; the thermal imager directly monitors the furnace temperature in the converter online through the viewing hole of the spray gun, and uses the different radiation constants of high-temperature furnace gas and slag to detect and predict splashing, and transmits the furnace temperature and slag information to the converter electrical control system to achieve automated operation; when signs of splashing are detected, the powder spraying and splashing suppression system is automatically started, and argon gas is used to spray dolomite powder into the furnace through the fluidized powder spray tank, related pipelines, and spray gun to promptly suppress the occurrence of splashing.

2. The converter splash prediction control and temperature measurement integrated device according to claim 1, characterized in that: The pneumatic ball valve 2 (10), the pressure sensor (12), the pressure reducing valve (13) and the electrical control system are installed outside the converter (16).

3. The converter splash prediction control and temperature measurement integrated device according to claim 1, characterized in that: The spray gun (2) is made of a high-temperature resistant and long-life refractory material. A sealing cover is provided at the front of the spray gun (2) and a box is provided at the rear. A bent pipe is pre-buried at one side of the spray gun (2) and a straight pipe is pre-buried at the rear of the spray gun (2). A pneumatic ball valve (3) and the box are connected behind the straight pipe. A thermal imager (4) is placed in the box at the rear of the spray gun (2).

4. The converter splash prediction control and temperature measurement integrated device according to claim 1, characterized in that: The viewing hole (1) is opened on the trunnion side of the converter (16), is coaxial with the trunnion (9), and is at a distance from the furnace mouth that meets the safety height. The viewing hole (1) is inclined downward at an angle of 30-60 degrees.

5. The converter splash prediction control and temperature measurement integrated device according to claim 1, characterized in that: The gas used in the gas source is argon.

6. A converter splash prediction control and temperature measurement integrated method, characterized in that The following steps are involved: (1) Connect a thermal imager to the rear of the spray gun, and set a pneumatic ball valve between the spray gun and the thermal imager; (2) A visual hole is opened on the furnace wall on the converter trunnion side; (3) Insert the spray gun into the visible hole, set the medium rotary joint and the electrical rotary joint in the trunnion, connect the powder spraying pipeline, the pneumatic pipeline and the thermal imager signal line through the medium rotary joint and the electrical rotary joint, and connect them to the spray gun, the pneumatic ball valve and the thermal imager close to the furnace wall, so that the spray gun can rotate with the converter. The long-life spray gun adopts high-temperature resistant and long-life refractory materials, can be used for a long period of time, and does not need to be moved during the entire converter production process; (4) The thermal imager detects the furnace temperature in the converter directly and continuously online through the viewing hole via the spray gun, and uses the different radiation constants of high-temperature furnace gas and slag to detect and predict splashing, and transmits the furnace temperature and slag information to the electrical control system; (5) When signs of splashing are detected, the electrical control system starts the powder spraying and splashing suppression device, using argon gas to spray dolomite powder into the furnace to suppress the occurrence of splashing in time.

7. The integrated method for converter splash prediction control and temperature measurement according to claim 6, characterized in that: In the step (2), a visual hole is opened on the converter trunnion side, coaxial with the trunnion and at a certain safety height Ha from the furnace mouth, and the visual hole is inclined downward by 30-60 degrees; the safety height must ensure that splashing tendency is detected and there is sufficient reaction time to suppress splashing. The calculation method of the safety height Ha is as follows: Ha=Hn×K Where: Hn—converter height; K—Safety factor, take 0.15-0.

25.

8. The integrated method for converter splash prediction control and temperature measurement according to claim 6, characterized in that: In the step (3), after the converter is repaired and before the converter is opened, the spray gun is inserted into the viewing hole by 200-290 mm, and the front sealing cover of the spray gun covers the viewing hole to keep the thermal imager away from the high temperature area as much as possible.

9. The integrated method for converter splash prediction control and temperature measurement according to claim 6, characterized in that: In the step (4), when the converter starts blowing, a pneumatic ball valve 1 on the spray gun pipeline in front of the thermal imager is opened, and the temperature in the furnace is measured by the thermal imager. The thermal imager detection radiation constant is set to the radiation constant of the furnace gas. When slag appears in the visible hole area, the thermal imager detection shows that the temperature of the slag area exceeds the detection radiation constant, and the size of the slag area within the visible hole range is identified. When the slag area exceeds 1 / 2 to 2 / 3 of the visible hole area, splashing is about to occur.

10. The integrated method for converter splash prediction control and temperature measurement according to claim 6, characterized in that: In the step (5), while closing the pneumatic ball valve 1 in front of the thermal imager, the pneumatic ball valve 2 and the pressure reducing valve are opened, and 8.5-9.5 kg of high-pressure gas is used to allow the dolomite powder to enter the spray gun from the fluidized powder spray tank through the fluidized conveying pipeline and the elbow, and then be sprayed into the converter through the visible hole through the spray gun. The amount of dolomite powder sprayed is 0.45-0.55 kg / t steel.

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