WO2021149490A1 - ランスチップ、転炉内測温設備および転炉内測温方法 - Google Patents
ランスチップ、転炉内測温設備および転炉内測温方法 Download PDFInfo
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- WO2021149490A1 WO2021149490A1 PCT/JP2021/000183 JP2021000183W WO2021149490A1 WO 2021149490 A1 WO2021149490 A1 WO 2021149490A1 JP 2021000183 W JP2021000183 W JP 2021000183W WO 2021149490 A1 WO2021149490 A1 WO 2021149490A1
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- temperature
- converter
- molten iron
- lance
- camera unit
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
Definitions
- the present invention relates to a lance tip used for measuring the temperature of molten iron blown in a converter, a temperature measuring facility in a converter, and a temperature measuring method in a converter using these.
- a top-blown lance is used to oxidize (burn) phosphorus and carbon in the molten iron by blowing oxygen gas onto the molten iron to adjust the composition of the molten iron and to adjust the composition of the molten iron.
- the temperature is adjusted to be the optimum temperature for the next process.
- the measurement of the molten iron temperature during blowing is important not only for adjusting the temperature of the molten iron but also for adjusting the composition of the molten iron.
- Patent Document 1 discloses a technique in which a probe for observing the inside of a furnace equipped with a CCD camera is provided at the tip of a sublance, and the sublance is inserted into the furnace to measure the temperature inside the converter.
- Patent Document 2 discloses a technique in which a CCD camera is provided at an end opposite to the tip of the main lance, and molten iron is photographed through a hole for injecting gas from above the outside of the lance, thereby measuring the temperature of the molten iron. Has been done.
- Patent Document 3 discloses a technique of measuring the brightness of molten iron from a tuyere provided at the bottom of a converter using a CCD camera and thereby measuring the temperature of the molten iron.
- Patent Document 4 describes a technique in which a single-core optical fiber small enough not to interfere with the injection of an oxygen jet is installed near the injection nozzle port of the main lance, and the temperature is measured by a single-color thermometer connected to the single-core optical fiber. It is disclosed.
- Japanese Unexamined Patent Publication No. 10-88221 Japanese Unexamined Patent Publication No. 2006-126062 JP-A-2007-322382 Japanese Unexamined Patent Publication No. 62-226025
- Patent Document 1 is a device that intermittently measures the state inside the furnace, there is a problem that it is difficult to continuously grasp the temperature change and improve the accuracy of the end point temperature. rice field. Further, since the probe is consumed at each measurement timing, it is necessary to frequently replace the probe, which causes a problem that the running cost becomes high.
- the present invention has been made in view of such problems of the prior art, and an object of the present invention is an in-converter temperature measuring facility and an in-converter temperature measuring device capable of continuously measuring the molten iron temperature in a converter. It is an object of the present invention to provide a lance chip used in the above and a temperature measurement method in a converter using these.
- a lance tip of a lance to be inserted into a converter the lance tip has a cylindrical lance tip main body and a camera unit, and the lance tip main body has an accommodating portion and the above.
- a peripheral hole through which the gas blown to the molten iron in the converter passes and a cooling water channel arranged so as to surround the periphery of the accommodating portion are provided, and the camera unit photographs the molten iron to generate image data.
- a lance chip having an image sensor, a lens, and a radiant heat blocking filter, and the camera unit is provided in the housing portion.
- the temperature measuring equipment in the converter having the lance tip according to the present invention By using the temperature measuring equipment in the converter having the lance tip according to the present invention, the temperature of the molten iron can be continuously measured while observing the molten iron in the converter. As a result, the accuracy of hitting the end point temperature in the smelting process is improved, which makes it possible to shorten the smelting time and reduce the amount of auxiliary raw materials used.
- FIG. 1 is a schematic cross-sectional view showing a state in which the molten iron 102 in the converter 100 is continuously measured by using the temperature measuring equipment 10 in the converter according to the first embodiment.
- FIG. 2 is a cross-sectional view (a) and a front view (b) of the lance tip 12.
- FIG. 3 is a perspective view showing the configuration of the camera unit 26.
- FIG. 4 is a diagram showing a simulation result simulating the temperature change of the image sensor 40 and the lens 42 when the sublance 14 is inserted into the converter 100.
- FIG. 5 is a graph showing the temperature change of molten iron in smelting for the purpose of decarburization.
- FIG. 1 is a schematic cross-sectional view showing a state in which the molten iron 102 in the converter 100 is continuously measured by using the temperature measuring equipment 10 in the converter according to the first embodiment.
- FIG. 2 is a cross-sectional view (a) and a front view (b) of the lance tip 12.
- FIG. 6 is a schematic cross-sectional view showing a state in which the molten iron 102 in the converter 100 is continuously measured by using the temperature measuring equipment 50 in the converter according to the second embodiment.
- FIG. 7 is a graph showing the temperature measurement result of the stainless molten steel by the temperature measurement equipment 50 in the converter.
- FIG. 8 is a graph showing the atmospheric temperature inside the housing.
- FIG. 1 is a schematic cross-sectional view showing a state in which the molten iron 102 in the converter 100 is continuously measured by using the temperature measuring equipment 10 in the converter according to the first embodiment.
- the temperature measurement of the molten iron 102 using the temperature measuring facility 10 in the converter according to the present embodiment can be applied to a blowing step for the purpose of desiliconization, dephosphorization, decarburization and the like.
- the following embodiment will explain the temperature measuring equipment 10 in the converter according to the first embodiment, assuming that it is applied to a blowing step for the purpose of decarburizing molten iron.
- Oxygen is supplied from the top-blown lance 104 to the molten iron 102 housed in the converter 100, and bottom-blown gas such as nitrogen is blown from the bottom-blown tuyere 106 to be agitated.
- bottom-blown gas such as nitrogen is blown from the bottom-blown tuyere 106 to be agitated.
- decarburization of carbon contained in the molten iron 102 proceeds, and the concentration of carbon contained in the molten iron 102 decreases.
- decarburization smelting static control and dynamic control are performed for the target end point component concentration and end point temperature of the molten iron 102, and the end point component concentration and end point temperature of the molten iron 102 after smelting are hit to the target values. I'm letting you.
- the static control is a control for calculating the amount of oxygen to be blown into the molten iron 102 from the operating conditions before the start of blowing.
- the dynamic control is a control for adjusting the amount of oxygen blown into the molten iron 102 based on the component concentration and the temperature measurement value of the molten iron 102 measured in the latter half of the blowing step.
- the temperature measuring equipment 10 in the converter according to the first embodiment is used for measuring the temperature of the molten iron 102 in the latter half of the blowing process used for dynamic control.
- the temperature measuring equipment 10 in the converter according to the first embodiment includes a sublance 14 provided with a lance chip 12 at the tip, a nitrogen gas supply device 20, a repeater 22, and an operation for converting image data into temperature data. It has a device 24 and.
- the lance tip 12 has a camera unit 26.
- the sub lance 14 is a measuring probe inserted into the converter separately from the top blowing lance 104, and means a lance provided with a measuring device such as a thermocouple inside.
- the sublance 14 may be provided with a gas flow path or a cooling water channel, if necessary, in order to protect the measuring device provided inside.
- the sublance 14 has a triple tube structure.
- the nitrogen gas is supplied from the nitrogen gas supply device 20 and is blown onto the molten iron 102 through the central pipe.
- the cooling water is supplied from the cooling water supply device 110, which is a converter facility, and circulates through two outer pipes.
- reference numeral 16 indicates a nitrogen gas flow
- reference numeral 18 indicates a cooling water flow.
- the sublance 14 takes a picture of the molten iron 102 in the converter 100 with a camera unit 26 provided at the tip while blowing nitrogen gas onto the molten iron 102 in a state of being inserted into the converter 100.
- nitrogen gas is an example of an inert gas, and argon gas may be used as the inert gas.
- the camera unit 26 continuously photographs the molten iron 102 and continuously generates image data.
- the camera unit 26 may capture a moving image of the molten iron 102.
- the image data generated by the camera unit 26 is transmitted to the arithmetic unit 24 through the repeater 22.
- the transmission of the image data from the camera unit 26 to the repeater 22 and the transmission of the image data from the repeater 22 to the arithmetic unit 24 may be wired transmission or wireless transmission.
- the arithmetic unit 24 is, for example, a general-purpose computer such as a workstation or a personal computer.
- the arithmetic unit 24 converts the image data transmitted from the camera unit 26 into temperature data.
- the arithmetic unit 24 When converting the luminance data into the temperature data, acquires, for example, the integrated value of the luminance within a predetermined sampling time and the maximum value of the luminance as the luminance data from the acquired image data. The arithmetic unit 24 converts the acquired luminance data into temperature data by using the correspondence between the luminance data measured in advance in the blackbody furnace and the temperature.
- a measurement principle using a two-color radiation thermometer (also called a two-color thermometer or ratio thermometer) can be applied.
- the two-color radiation thermometer measures the radiance at two different wavelengths, calculates the ratio of these, and converts it into the temperature of the object by comparing it with the pre-measured radiance ratio of the blackbody.
- This method enables relatively stable temperature measurement even if the emissivity fluctuates.
- the arithmetic unit 24 uses the three primary colors of image data, red (R), green (G), and blue (B).
- spectral radiance data of R and G is acquired, and the ratio of radiance is calculated from the radiance data.
- the computing device 24 converts the spectral radiance data into temperature data by using the correspondence between the intensity ratio of the spectral radiance data and the temperature, which have been examined in advance in a blackbody radiation furnace or the like.
- the arithmetic unit 24 When using image data from an infrared camera, the arithmetic unit 24 creates luminance data corresponding to the wavelength of infrared rays.
- the arithmetic unit 24 converts the luminance data into temperature data by using the correspondence between the intensity and the temperature of the luminance data examined in advance by a blackbody radiation furnace or the like.
- the luminance data obtained from the image data if the relationship between the intensity of the wavelength component and the temperature is known in advance, the data of an arbitrary wavelength component in the infrared wavelength range can be used.
- the arithmetic unit 24 When the camera unit 26 uses a device such as an infrared thermography camera that includes functions from acquisition of image data to conversion to temperature data, the arithmetic unit 24 has a function of converting image data into temperature data. It does not have to be.
- the arithmetic unit 24 displays the temperature data on a display device 28 such as a display, for example. In this way, the liquid level temperature of the molten iron 102 is continuously measured by using the temperature measuring facility 10 in the converter according to the first embodiment.
- the arithmetic unit 24 may display the image data transmitted together with the temperature data on the display device 28. By displaying the image data on the display device 28 in this way, the temperature can be measured while observing the molten iron in the converter.
- the temperature measuring equipment 10 in the converter does not have to have the display device 28.
- FIG. 2 is a cross-sectional view (a) and a front view (b) of the lance tip 12.
- the cross-sectional view (a) shown in FIG. 2 is a cross-sectional view taken along the line AA in the front view (b).
- the lance tip 12 has a cylindrical shape having the same diameter as the sub lance 14, and is attached to the tip of the sub lance 14.
- the lance tip 12 has a lance tip main body 30 and a camera unit 26.
- the lance tip main body 30 has, for example, a cylindrical shape having a diameter of 300 to 600 mm (400 mm in the example shown in FIG. 2), and is provided with an accommodating portion 32, a peripheral hole 34, and a cooling water channel 36.
- the accommodating portion 32 is a through hole having a diameter of 35 to 70 mm (57 mm in the example shown in FIG. 2) provided at the center of the axis of the lance tip main body 30.
- a camera unit 26 is installed in the accommodating portion 32.
- the accommodating portion 32 may be a recess that does not penetrate the sublance 14 side, but if the accommodating portion 32 penetrates the sublance 14 side, the camera unit 26 is cooled by nitrogen gas and the temperature of the camera unit 26 is increased. It is more preferable because the rise is suppressed.
- the peripheral hole 34 is a hole through which the nitrogen gas sprayed on the molten iron 102 passes.
- the peripheral hole 34 is connected to the central canal of the sublance 14.
- six peripheral holes 34 are provided in an annular shape on the end surface of the lance tip main body 30.
- FIG. 2 shows an example in which six peripheral holes 34 are provided, the present invention is not limited to this, and at least one peripheral hole may be provided.
- the number of peripheral holes 34 is preferably 4 or more and 8 or less, and by reducing the number of peripheral holes 34 to 4 or more and 8 or less, the periphery of the camera unit 26 can be uniformly cooled.
- a peripheral hole facing the photographing path may be provided.
- the cooling water channel 36 is a pipe through which the cooling water supplied from the cooling water supply device 110 passes.
- the cooling water channel 36 is provided so as to surround the periphery of the accommodating portion 32.
- the cooling water channel 36 is connected to two outer pipes on the outside of the sublance 14, and the cooling water circulates in the cooling water channel 36.
- the camera unit 26 installed in the accommodating portion 32 is cooled by the cooling water of 40 ° C. or lower flowing through the cooling water channel 36. As a result, even if the camera unit 26 is inserted into the high temperature converter, the temperature of the camera unit 26 can be maintained below the guaranteed operating temperature of the camera unit 26.
- a camera unit having a guaranteed operating temperature of, for example, 85 ° C. can be used.
- ICETAH series products manufactured by IMPERX fall under this category.
- a heat-resistant camera manufactured by Integrated Systems, Inc. that can withstand a temperature of 200 ° C. may be used. Even when a commercially available camera having a guaranteed operating temperature of about 60 ° C. is used, it may be able to withstand an atmospheric temperature of 85 to 100 ° C. if it is used for a short period of about several months.
- FIG. 2 an example in which the accommodating portion 32 is provided at the center of the axis of the lance tip main body 30 is shown, but the present invention is not limited to this.
- the accommodating portion 32 may be provided in a range surrounded by the cooling water channel 36.
- FIG. 3 is a perspective view showing the configuration of the camera unit 26.
- FIG. 3A is a perspective view of the camera unit 26
- FIG. 3B is a perspective view showing each configuration of the camera unit 26.
- the camera unit 26 includes a housing 38, an image sensor 40, a lens 42, two radiant heat blocking filters 44, a fixing ring 46, and a battery 48.
- the housing 38 is a hollow cylindrical container made of a metal having high thermal conductivity, for example, Cu, and having a hole for photographing on one end surface side.
- the outer diameter of the housing 38 is the same as the inner diameter of the accommodating portion 32. In the example shown in FIG. 2, the inner diameter of the accommodating portion 32 is 57 mm.
- the image sensor 40 is a sensor that captures the molten iron 102 and generates image data.
- the image sensor 40 includes a CCD sensor and a data processing circuit that processes the data generated by the CCD sensor into image data.
- Two radiant heat blocking filters 44 are fixed to the fixing ring 46 on the side of the lens 42 facing the molten iron 102. By providing the radiant heat blocking filter 44, the temperature rise of the lens 42 and the image sensor 40 due to the radiant heat from the molten iron is suppressed, thereby preventing the lens 42 and the image sensor 40 from being damaged. If the two radiant heat blocking filters 44 can be fixed to the lens 42 by other means, the fixing ring 46 may not be provided.
- An example of having a CCD sensor is shown as the image sensor 40, but the present invention is not limited to this, and a CMOS sensor may be used instead of the CCD sensor.
- the radiant heat blocking filter 44 includes a Thorlab ND filter (model NDUV10B, model NDUV20B, model NDUV30B), a Thorlab hot mirror (infrared cut filter) (model M254H00), and a Thorlab bandpass filter (model).
- a Thorlab ND filter model NDUV10B, model NDUV20B, model NDUV30B
- a Thorlab hot mirror infrared cut filter
- M254H00 infrared cut filter
- a Thorlab bandpass filter model.
- One or more of FL532-1 can be used.
- FIG. 3 an example in which two radiant heat blocking filters 44 are provided is shown, but the present invention is not limited to this, and if one or more radiant heat blocking filters 44 are provided, the temperature of the camera unit 26 due to the radiant heat of molten iron It is possible to suppress the ascent and prevent the camera unit 26 from being damaged.
- a radiant heat blocking filter that blocks radiant heat having a wavelength different from the wavelength used for converting into temperature
- the image sensor 40, the lens 42, the two radiant heat blocking filters 44, and the battery 48 are installed in the housing 38, and the camera unit 26 is attached to the lance chip main body by fixing the housing 38 to the housing portion 32. Will be done.
- the image sensor 40, the lens 42, and the two radiant heat blocking filters 44 may be mounted directly in the accommodating portion 32, and therefore the camera unit 26 does not have to have a housing. However, since it is better to fix the image sensor 40 or the like in the housing 38 in advance and fix the housing to the housing portion 32 in order to replace the camera unit 26, the camera unit 26 should have the housing 38. Is preferable.
- the battery 48 is a device that supplies electric power to drive the image sensor 40. If the camera unit 26 and the external power supply are connected, the camera unit 26 does not have to have the battery 48.
- the cooling water channel 36 is arranged around the accommodating portion 32 to cool the lens 42, and the radiant heat blocking filter 44 is located on the side of the lens 42 facing the molten iron 102. Is provided to suppress the temperature rise of the image sensor 40 and the lens 42.
- FIG. 4 is a diagram showing a simulation result simulating the temperature change of the image sensor 40 and the lens 42 when the sublance 14 is inserted into the converter 100.
- STAR-CCM + manufactured by SIEMENS
- the cooling water temperature, cooling water amount, heat transfer rate on the outer surface of the lance chip, heat transfer rate on the inner surface of the lance chip, temperature on the outer surface of the lance, and inner surface of the lance are shown in Table 1 below.
- Table 1 the temperature change of the portion where the image sensor 40 and the lens 42 are housed was simulated. The simulation does not consider the cooling effect of nitrogen gas.
- the heat flux from the outer surface of the lance in the furnace was set to 800 kW / m 2 .
- This value is a value set on the assumption that the amount of heat input to the cooling water is calculated based on the values of the inlet side temperature and the outlet side temperature of the cooling water, and this is balanced with the amount of heat input from the outer surface of the lance in the furnace. ..
- the average temperature of the first radiant heat blocking filter 44 (A) was 84 ° C, and the maximum temperature was 94 ° C.
- the average temperature of the second radiant heat blocking filter 44 (B) was 62 ° C, and the maximum temperature was 66 ° C.
- the average temperature of the portion where the image sensor 40 and the lens 42 are housed was 32 ° C, and the maximum temperature was 61 ° C. Since the guaranteed operating temperature of the camera unit 26 used in the first embodiment is 100 ° C. or lower, if at least one radiant heat blocking filter 44 is provided, the temperature of the image sensor 40 and the lens 42 in the camera unit 26 can be set to 100. It was confirmed that the temperature could be maintained below °C.
- FIG. 5 is a graph showing the temperature change of molten iron in smelting for the purpose of decarburization.
- the vertical axis represents the molten iron temperature (° C.) and the horizontal axis represents the carbon concentration (mass%). Since oxygen is supplied from the top blown lance 104 and the carbon concentration of the molten iron 102 decreases, the carbon concentration changes from right to left on the horizontal axis as the blowing progresses. On the other hand, the temperature of the molten iron 102 rises as the blowing progresses.
- the temperature of the molten iron 102 is measured by intermittently inserting a sublance, and the timing at which the end point temperature of the molten iron 102 becomes the target temperature is predicted from the measured value. ..
- the timing is only predicted, the end point temperature may not reach the target temperature for some reason.
- the molten iron 102 in the latter half of the blowing process can be blown while continuously measuring the temperature, so that the end point temperature and the target temperature can be set. There is no deviation.
- the temperature of the molten iron 102 is measured in the latter half of the smelting step, but the molten iron 102 in all the smelting steps is continuously measured by using the temperature measuring facility 10 in the converter according to the first embodiment.
- the temperature may be measured.
- the temperature measuring equipment 10 in the converter As described above, by using the temperature measuring equipment 10 in the converter according to the first embodiment, it is possible to continuously measure the temperature of the molten iron while observing the molten iron 102 in the converter 100. As a result, the accuracy of hitting the end point temperature in the smelting process is improved, and as a result, the smelting time can be shortened and the amount of auxiliary raw materials used can be reduced. Since the consumable probe used for the conventional sublance is not used, the running cost for temperature measurement can be reduced.
- FIG. 6 is a schematic cross-sectional view showing a state in which the molten iron 102 in the converter 100 is continuously measured by using the temperature measuring equipment 50 in the converter according to the second embodiment.
- the temperature measuring equipment 50 in the converter according to the second embodiment switches between oxygen gas and nitrogen gas, the top blowing lance 52 provided with the lance tip 12 at the tip, the nitrogen gas supply device 20, and the nitrogen gas supply device 20 shown in FIG. It has a switching device 54, a repeater 22, and an arithmetic device 24 that converts image data into temperature data.
- the lance tip 12 has a camera unit 26.
- the same reference number is given to the configuration common to the temperature measuring equipment 10 in the converter shown in FIG. 1, and duplicate description is omitted.
- the top blown lance 52 has a triple pipe structure.
- the nitrogen gas supplied from the nitrogen gas supply device 20 or the oxygen gas supplied from the oxygen gas supply device 112 which is a converter facility is blown to the molten iron 102 through the central pipe.
- the cooling water is supplied from the cooling water supply device 110, which is a converter facility, and circulates through two outer pipes.
- reference numeral 56 is a nitrogen gas flow or an oxygen gas flow.
- oxygen gas is supplied to the molten iron 102 from the top blowing lance 52. As a result, decarburization of carbon contained in the molten iron 102 proceeds, and the concentration of carbon contained in the molten iron 102 decreases.
- the gas conveyed by the switching device 54 is switched from oxygen gas to nitrogen gas, and while the nitrogen gas is blown onto the molten iron 102, the converter 100 is provided by the camera unit 26 provided at the tip. The molten iron 102 inside is photographed. In this way, the temperature measuring equipment 50 in the converter is used to continuously measure the temperature of the molten iron 102 in the converter 100.
- the nitrogen gas supply device 20 may be an argon supply device that supplies, for example, argon as an inert gas.
- the lance tip 12 shown in FIG. 2 can be used.
- a lance tip having a plurality of wide peripheral holes 34 in order to increase the area where oxygen gas comes into contact with the molten iron surface, and it is preferable to use 4 to 8 peripheral holes.
- the peripheral hole 34 faces slightly outward from the axial center of the lance tip main body 30.
- the temperature measuring equipment 50 in the converter according to the second embodiment it is possible to continuously measure the temperature of the molten iron 102 while observing the molten iron 102 in the converter 100.
- the accuracy of hitting the end point temperature in the smelting process is improved, and as a result, the smelting time can be shortened and the amount of auxiliary raw materials used can be reduced. Since the consumable probe used for the conventional sublance is not used, the running cost for temperature measurement can be reduced.
- the stainless molten steel to be measured is 130 tons of hot metal that has been pretreated and heated to about 1500 ° C. by bottom-blown oxygen.
- the upper blowing lance 52 having a triple tube structure is installed so that the position of the camera unit 26 is 4.6 m from the slag surface.
- the switching device 54 switched between nitrogen gas and oxygen gas supplied from the top-blown lance 52.
- oxygen gas is blown from the central pipe of the top blown lance 52, and when measuring the temperature of stainless molten steel, nitrogen gas (flow rate 300 Nm 3 / min) is blown and provided at the tip.
- the molten iron 102 in the converter 100 was photographed by the camera unit 26.
- a camera equipped with a CMOS sensor was used as the camera unit 26.
- the guaranteed operating temperature of the camera used is 55 ° C.
- the maximum value of the brightness within the sampling time of the image data generated by the camera unit 26 is used as the brightness data, and the brightness data is converted into the temperature data by using the correspondence between the brightness and the temperature measured in advance in the blackbody furnace.
- the liquid level temperature of the molten stainless steel was continuously measured.
- a conventional batch temperature measurement using a sublance was also performed.
- a temperature sensor was provided in the housing 38 of the camera unit 26, and the atmospheric temperature in the housing 38 during standby on the furnace and the atmospheric temperature in the housing 38 during insertion into the furnace were also measured.
- FIG. 7 is a graph showing the temperature measurement result of the stainless molten steel by the temperature measurement equipment 50 in the converter.
- the horizontal axis is the elapsed time (min), and the vertical axis is the stainless molten steel temperature (° C.).
- the black circles shown in FIG. 7 indicate the temperature data measured by the batch temperature measurement, and the numerical values indicate the temperature.
- the temperature measured by the batch temperature measurement and the temperature measured by the temperature measuring facility 50 in the converter coincided with each other. From this result, it was confirmed that the temperature of the liquid level of the molten stainless steel heated to about 1500 ° C. by bottom-blown oxygen can be continuously measured by using the temperature measuring equipment 50 in the converter.
- FIG. 8 is a graph showing the atmospheric temperature inside the housing.
- the horizontal axis is the elapsed time (min: sec), and the vertical axis is the atmospheric temperature inside the housing (° C.). As shown in FIG. 8, it was confirmed that the temperature inside the housing 38 was maintained at about room temperature from the standby on the furnace to the insertion into the furnace.
- the lance tip 12 was removed from the top blowing lance 52, and when the camera unit 26 provided in the accommodating portion 32 was checked, it was confirmed that the camera unit 26 operated normally. From this result, in the converter temperature measuring facility 50 according to the present embodiment, even if the temperature of the molten stainless steel at 1500 ° C. is measured, the image sensor 40 and the lens 42 can be kept at about room temperature, and the camera is heated by heating the molten stainless steel. It was confirmed that the unit 26 could be prevented from being damaged.
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Abstract
Description
(1)転炉内に挿入されるランスのランスチップであって、前記ランスチップは、円筒状のランスチップ本体と、カメラユニットとを有し、前記ランスチップ本体には、収容部と、前記転炉内の溶鉄に吹き付けられるガスが通過する周孔と、前記収容部の周囲を囲むように配された冷却水路とが設けられ、前記カメラユニットは、前記溶鉄を撮影して画像データを生成するイメージセンサと、レンズと、輻射熱遮断フィルターとを有し、前記カメラユニットは前記収容部に設けられる、ランスチップ。
(2)転炉内の溶鉄を測温する転炉内測温設備であって、(1)に記載のランスチップが先端に設けられたサブランスと、不活性ガス供給装置と、前記画像データを温度データに変換する演算装置と、を有する、転炉内測温設備。
(3)転炉内の溶鉄を測温する転炉内測温設備であって、(1)に記載のランスチップが先端に設けられた上吹きランスと、不活性ガス供給装置と、酸素ガスおよび不活性ガスを切り替える切り替え装置と、前記画像データを温度データに変換する演算装置と、を有する、転炉内測温設備。
(4)前記演算装置は、画像データから作成した分光放射輝度データを温度データに変換する、(2)または(3)に記載の転炉内測温設備。
(5)前記転炉内測温設備は、さらに前記イメージセンサにより生成された画像データを表示する表示装置を有する、(2)から(4)の何れか1つに記載の転炉内測温設備。
(6)(2)から(5)の何れか1つに記載の転炉内測温設備を用いた転炉内測温方法であって、前記溶鉄に不活性ガスを吹き付けながら前記カメラユニットで前記溶鉄を撮影し、生成された画像データを温度データに変換する、転炉内測温方法。
演算装置24は、カメラユニット26から伝送される画像データを温度データに変換する。画像データを温度データに変換する方法としては、画像データから輝度データを取得して、輝度データから温度データに変換する方法と、画像データから分光放射輝度データを取得して、分光放射輝度データから温度データに変換する方法とがある。
12 ランスチップ
14 サブランス
16 窒素ガス流れ
18 冷却水流れ
20 窒素ガス供給装置
22 中継器
24 演算装置
26 カメラユニット
28 表示装置
30 ランスチップ本体
32 収容部
34 周孔
36 冷却水路
38 ハウジング
40 イメージセンサ
42 レンズ
44 輻射熱遮断フィルター
46 固定リング
48 バッテリー
50 転炉内測温設備
52 上吹きランス
54 切り替え装置
56 窒素ガス流れまたは酸素ガス流れ
100 転炉
102 溶鉄
104 上吹きランス
106 底吹き羽口
110 冷却水供給装置
112 酸素ガス供給装置
114 スラグ
Claims (6)
- 転炉内に挿入されるランスのランスチップであって、
前記ランスチップは、円筒状のランスチップ本体と、カメラユニットとを有し、
前記ランスチップ本体には、収容部と、前記転炉内の溶鉄に吹き付けられるガスが通過する周孔と、前記収容部の周囲を囲むように配された冷却水路とが設けられ、
前記カメラユニットは、前記溶鉄を撮影して画像データを生成するイメージセンサと、レンズと、輻射熱遮断フィルターとを有し、
前記カメラユニットは前記収容部に設けられる、ランスチップ。 - 転炉内の溶鉄を測温する転炉内測温設備であって、
請求項1に記載のランスチップが先端に設けられたサブランスと、
不活性ガス供給装置と、
前記画像データを温度データに変換する演算装置と、
を有する、転炉内測温設備。 - 転炉内の溶鉄を測温する転炉内測温設備であって、
請求項1に記載のランスチップが先端に設けられた上吹きランスと、
不活性ガス供給装置と、
酸素ガスおよび不活性ガスを切り替える切り替え装置と、
前記画像データを温度データに変換する演算装置と、
を有する、転炉内測温設備。 - 前記演算装置は、画像データから作成した分光放射輝度データを温度データに変換する、請求項2または請求項3に記載の転炉内測温設備。
- 前記転炉内測温設備は、さらに前記イメージセンサにより生成された画像データを表示する表示装置を有する、請求項2から請求項4の何れか一項に記載の転炉内測温設備。
- 請求項2から請求項5の何れか一項に記載の転炉内測温設備を用いた転炉内測温方法であって、
前記溶鉄に不活性ガスを吹き付けながら前記カメラユニットで前記溶鉄を撮影し、生成された画像データを温度データに変換する、転炉内測温方法。
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113686449A (zh) * | 2021-08-19 | 2021-11-23 | 中冶赛迪工程技术股份有限公司 | 机器人测温取样用测距测温枪 |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5868945U (ja) * | 1981-11-02 | 1983-05-11 | 品川白煉瓦株式会社 | 混銑車用熱間自動吹付ノズル装置 |
JPS62226025A (ja) | 1986-03-28 | 1987-10-05 | Sumitomo Metal Ind Ltd | 製鋼炉の火点温度測定方法 |
JPS63317614A (ja) * | 1987-06-19 | 1988-12-26 | Kobe Steel Ltd | 測定用ランスにおけるホルダ−の曲がり検出装置 |
JPH1088221A (ja) | 1996-09-06 | 1998-04-07 | Nkk Corp | 冶金炉内観察用プローブ及び冶金炉内観察方法 |
JP2005315779A (ja) * | 2004-04-30 | 2005-11-10 | Jfe Steel Kk | 火点放射計測方法及びその装置 |
JP2006126062A (ja) | 2004-10-29 | 2006-05-18 | Jfe Steel Kk | 溶融金属の温度計測方法及び装置 |
JP2007322382A (ja) | 2006-06-05 | 2007-12-13 | Nippon Steel Corp | 転炉内溶鋼の測温方法 |
JP2015067875A (ja) * | 2013-09-30 | 2015-04-13 | スチールプランテック株式会社 | ランス設備、およびそれを用いた精錬炉、ならびにランス位置調節方法 |
-
2021
- 2021-01-06 WO PCT/JP2021/000183 patent/WO2021149490A1/ja unknown
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5868945U (ja) * | 1981-11-02 | 1983-05-11 | 品川白煉瓦株式会社 | 混銑車用熱間自動吹付ノズル装置 |
JPS62226025A (ja) | 1986-03-28 | 1987-10-05 | Sumitomo Metal Ind Ltd | 製鋼炉の火点温度測定方法 |
JPS63317614A (ja) * | 1987-06-19 | 1988-12-26 | Kobe Steel Ltd | 測定用ランスにおけるホルダ−の曲がり検出装置 |
JPH1088221A (ja) | 1996-09-06 | 1998-04-07 | Nkk Corp | 冶金炉内観察用プローブ及び冶金炉内観察方法 |
JP2005315779A (ja) * | 2004-04-30 | 2005-11-10 | Jfe Steel Kk | 火点放射計測方法及びその装置 |
JP2006126062A (ja) | 2004-10-29 | 2006-05-18 | Jfe Steel Kk | 溶融金属の温度計測方法及び装置 |
JP2007322382A (ja) | 2006-06-05 | 2007-12-13 | Nippon Steel Corp | 転炉内溶鋼の測温方法 |
JP2015067875A (ja) * | 2013-09-30 | 2015-04-13 | スチールプランテック株式会社 | ランス設備、およびそれを用いた精錬炉、ならびにランス位置調節方法 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113686449A (zh) * | 2021-08-19 | 2021-11-23 | 中冶赛迪工程技术股份有限公司 | 机器人测温取样用测距测温枪 |
CN113686449B (zh) * | 2021-08-19 | 2023-12-05 | 中冶赛迪工程技术股份有限公司 | 机器人测温取样用测距测温枪 |
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