WO2022201721A1 - 溶融物高さの検出方法 - Google Patents
溶融物高さの検出方法 Download PDFInfo
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- WO2022201721A1 WO2022201721A1 PCT/JP2021/048667 JP2021048667W WO2022201721A1 WO 2022201721 A1 WO2022201721 A1 WO 2022201721A1 JP 2021048667 W JP2021048667 W JP 2021048667W WO 2022201721 A1 WO2022201721 A1 WO 2022201721A1
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- WIPO (PCT)
- Prior art keywords
- melt
- height
- discharge
- tap
- hole
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000012768 molten material Substances 0.000 title abstract description 36
- 238000007599 discharging Methods 0.000 claims abstract description 5
- 239000000155 melt Substances 0.000 claims description 127
- 238000001514 detection method Methods 0.000 claims description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 42
- 239000002893 slag Substances 0.000 description 39
- 239000002184 metal Substances 0.000 description 18
- 229910052751 metal Inorganic materials 0.000 description 18
- 229910052742 iron Inorganic materials 0.000 description 16
- 239000007789 gas Substances 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000010079 rubber tapping Methods 0.000 description 8
- 239000007788 liquid Substances 0.000 description 7
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 6
- 238000003384 imaging method Methods 0.000 description 6
- 238000004364 calculation method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000002344 surface layer Substances 0.000 description 4
- 229910000805 Pig iron Inorganic materials 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 125000004430 oxygen atom Chemical group O* 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/14—Discharging devices, e.g. for slag
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/24—Test rods or other checking devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
Definitions
- the present invention relates to a melt height detection method for detecting the melt height of a blast furnace.
- a blast furnace is one of the blast furnaces where the inside of the furnace cannot be seen directly.
- a blast furnace is a blast furnace in which iron-rich ore and coke are charged from the top of the furnace and a mixed gas such as air or pure oxygen is blown from the bottom of the furnace to make iron.
- the produced molten iron slag is stored at the bottom of the blast furnace, and is discharged out of the furnace through a hole called a tap hole before it reaches the blast furnace ancillary equipment.
- Patent Document 1 There is a technology that aims to grasp the height of the melt in a blast furnace.
- Patent Document 1 two or more images of the surface pattern of the melt discharged from the discharge hole of the blast furnace are photographed in a short time, and the discharge speed of the melt is calculated from the change in the pattern, and the discharge speed and the It is disclosed that the melt height can be calculated from the furnace pressure.
- Means for solving the above problems are as follows.
- a method for detecting the height of a melt in a blast furnace having a discharge hole for discharging the melt in the lower part of the furnace comprising: measuring a discharge distance of the melt discharged from the discharge hole; calculating the discharge speed of the melt discharged from the discharge hole using the height of the discharge hole and the discharge angle of the melt, and detecting the height of the melt using the discharge speed; Height detection method.
- the melt height detection method according to (1) wherein the height of the discharge hole is measured.
- the melt height is detected by using the resistance force received by the melt from the discharge hole until it is discharged from the discharge hole and the discharge speed. melt height detection method.
- the discharge speed of the melt is calculated using the discharge distance of the melt discharged from the discharge hole, the height of the discharge hole, and the discharge angle of the melt.
- the discharge speed of the melt can be calculated more accurately than the method of obtaining the discharge speed of the melt by photographing.
- the melt height can be detected with high accuracy.
- FIG. 3 is a partial cross-sectional view of the lower part of the blast furnace 10.
- FIG. FIG. 3 is a schematic diagram showing a state in which a molten material 12 is discharged from a tap hole 14; It is a cross-sectional schematic diagram of the tap hole 14 through which the melt 12 passes.
- 2 is an image showing the discharge flow of invention example 1 and invention example 2.
- FIG. 5 is a graph showing detection results of melt height H in Invention Examples 1 and 2.
- FIG. It is a graph which shows the time change of molten iron slag balance.
- a blast furnace is used as a blast furnace, and an embodiment of a method for detecting the height of a molten material in the blast furnace will be described.
- the method for detecting the melt height according to the present invention is applicable not only to the blast furnace but also to any blast furnace having a discharge hole for discharging the melt out of the furnace in the lower part of the furnace.
- the discharge speed of the melt discharged from the discharge hole to the outside of the furnace is calculated, and the discharge speed is used to determine the height of the melt stored in the lower part of the blast furnace.
- a method for calculating the discharge speed of the molten material discharged from the discharge hole to the outside of the furnace will be described with reference to FIGS. 1 to 3.
- FIG. 1 a method for calculating the discharge speed of the molten material discharged from the discharge hole to the outside of the furnace will be described with reference to FIGS. 1 to 3.
- FIG. 1 is a partial cross-sectional view of the lower part of the blast furnace 10.
- FIG. A plurality of tapping holes 14 are provided in the lower part of the blast furnace 10 to discharge the molten material 12 stored in the lower part of the furnace.
- the melt 12 is hot metal and slag, or mixtures thereof, that exist as liquids in the furnace.
- the melt 12 is discharged out of the furnace through the taphole 14 and falls in a parabolic discharge stream 16 to the surface 20 of the melt 12 in the trough 18 .
- the tap hole 14 is an example of a discharge hole for discharging the molten material 12 stored in the lower part of the blast furnace to the outside of the furnace.
- FIG. 2 is a schematic diagram showing how the molten material 12 is discharged from the tap hole 14.
- the discharge distance L tap of the melt 12 is used to calculate the ejection speed of the melt 12 .
- the ejection distance L tap of the melt 12 is the distance from the ejection of the melt 12 from the tap hole 14 to the position where the melt 12 falls on the surface of the melt 12 .
- the discharge distance L tap can be measured, for example, using an image obtained by imaging the discharge flow 16 together with a subject serving as a length reference.
- the taphole 14 height h tap is the height from the center of the taphole 14 to the liquid surface 20 where the melt 12 falls.
- the height from the center of the tap hole 14 to the liquid surface 20 on which the molten material 12 falls may be measured using an image obtained by imaging the discharge stream 16 together with an object serving as a length reference.
- a design value for providing the tap hole 14 may be used.
- the central position of the tapping hole 14 changes as the molten material 12 is discharged from the tapping hole 14 and the refractory is melted. Also, the height of the liquid surface 20 may change. Therefore, it is preferable to measure the height from the center of the tap hole 14 to the liquid surface 20 where the molten material 12 falls using an image obtained by imaging the discharge flow 16 .
- the discharge angle ⁇ tap of the melt 12 is the angle between the discharge flow 16 and the horizontal plane as the melt 12 is discharged from the taphole 14 .
- the discharge angle ⁇ tap may be measured using an image obtained by imaging the discharge flow 16, or may be the same as the design value of the inclination angle of the center axis of the tap hole 14 with respect to the horizontal plane. That is, the height h tap of the taphole 14 and the ejection angle ⁇ tap of the melt 12 do not necessarily have to be measured.
- FIG. 2(b) is a diagram showing a state in which the obliquely projected object 30 moves along a parabolic trajectory.
- FIG. 2B for example, if an object 30 is obliquely projected from a height h at a projection angle ⁇ and lands after flying a flight distance L, the only force acting on the object 30 is gravity.
- x be the horizontal direction and z be the vertical direction.
- vx in the above equation (1) is the initial velocity (m/s) in the x direction
- vz in the equation (2) is the initial velocity (m/s) in the z direction
- m is the mass (kg) of the object 30
- g is the gravitational acceleration (9.8 m/s 2 ).
- v ini in the above equation (3) is the initial velocity (m/s) of the object 30, ⁇ is the projection angle (rad), and h is the height (m).
- the second term on the right side of equation (3) multiplies the initial velocity in the z direction by ⁇ t.
- L in the above equation (4) is the flying distance (m) of the object 30 in the x direction.
- v ini is the initial velocity of the object 30 (m/s) and ⁇ is the projection angle (rad).
- the following equation (5) is obtained by arranging the initial velocity v int of the object 30 using the above equations (3) and (4).
- the reference for the height h is the landing position of the object 30 .
- the height of the melt 12 is calculated using the discharge speed V tap of the melt 12 and the following equation (6).
- ⁇ l in the above equation (6) is the density of the melt 12 (kg/m 3 ), v tap is the discharge speed of the melt 12 (m/s), and P 1 is the furnace gas pressure (Pa).
- g is the gravitational acceleration (9.8 m/s 2 )
- H is the height (m) of the melt 12 stored in the lower part of the furnace
- P 2 is the gas pressure at the outlet of the tapping hole 14 ( Pa)
- h tap is the taphole 14 height (m).
- a past actual value may be used for the density ⁇ l of the melt 12 .
- the density ⁇ l of the melt 12 can be calculated by proportionally dividing the hot metal density and the slag density by the mixing ratio.
- the ejection speed v tap of the melt 12 is v int calculated by the above equation (5).
- the in-furnace gas pressure P1 is obtained from the measured value of the pressure gauge installed in the lower part of the blast furnace 10 . Atmospheric pressure may be used as the gas pressure P2 at the outlet of the tap hole 14 .
- the base of the height H of the molten material 12 and the height h tap of the tap hole 14 in the above equation (6) is the bottom position of the blast furnace 10 .
- One item on the left side of the above equation (6) is a term that indicates the mechanical energy of the melt 12 stored in the lower part of the blast furnace 10 .
- the two items on the left side of the above equation (6) represent the mechanical energy of the melt 12 immediately after being discharged from the tap hole 14 .
- the term of the kinetic energy of the melt 12 stored in the lower part of the furnace is a sufficiently small value compared to the other terms, so it can be ignored.
- the above formula (6) is a formula in which these mechanical energies are equal (the difference between the first and second items is 0), and by using the formula (6), the molten material 12 can be detected.
- FIG. 3 is a schematic cross-sectional view of the tapping hole 14 through which the melt 12 passes.
- f tap is the pipe friction coefficient (-) of the tap hole 14
- W tap is the length (m) of the tap hole 14
- D tap is the inner diameter of the tap hole 14 (m )
- Ke is the tube inlet loss coefficient (-). Note that (-) means dimensionless.
- the length W tap of the tap hole 14 is obtained from the penetration length of the drill when the tap hole 14 is provided.
- the inner diameter D tap of the tap hole 14 is obtained from the diameter of the drill used when forming the tap hole 14 .
- the pipe friction coefficient f tap of the tap hole 14 can be calculated by Swamy Jane's equation shown in the following equation (8).
- e tap is the tap hole roughness (m)
- D tap is the inner diameter (m) of the tap hole 14
- Re is the Reynolds number (-) of the fluid flowing through the tap hole 14.
- the tap hole roughness e tap varies depending on the hole opening method, mud material, elapsed time from the start of tapping, etc., but it is appropriate to use a value within the range of 0.0001 to 0.01 m based on operation analysis. One thing has been confirmed.
- the Reynolds number Re can be calculated by the following equation (9).
- ⁇ in the above equation (9) is the viscosity (Pa ⁇ s) of the melt 12 .
- the viscosity ⁇ of the melt 12 is calculated by proportionally dividing the viscosities of the hot metal and molten slag by the mixing ratio.
- Past performance values may be used for the viscosities of hot metal and slag, and the viscosities of slag are estimated from the concentrations of components such as CaO, MgO, Al 2 O 3 , SiO 2 , and FeO and temperature. may be estimated using the method described in
- the pipe inlet loss coefficient Ke can be calculated using the following formula (10) described in Non-Patent Document 2.
- ⁇ tap is the ejection angle (rad) of the melt 12 .
- the discharge distance L tap of the molten material 12 discharged from the tap hole, the height h tap of the tap hole 14, and the height h tap of the molten material 12 is calculated.
- the discharge speed v tap of the melt 12 can be calculated more accurately than the method of obtaining the discharge speed of the melt 12 by photographing the pattern of the melt 12 .
- the calculated discharge speed v tap of the melt 12 is calculated using the above equation (6) which assumes that .
- the discharge speed v tap of the melt 12 calculated more accurately than the method of obtaining the discharge speed of the melt 12 by photographing the pattern of the melt 12 is used. Since the height H of the melted material 12 is calculated by using the height H of the melted material 12, the detection accuracy of the height H of the melted material 12 is also improved.
- the adequacy of the melt height detection method according to the present embodiment was confirmed using a large blast furnace with a capacity of about 5000 m 3 .
- the discharge flow of the molten material was imaged immediately after the hole was opened, and the discharge distance L tap and the taphole height h tap were measured from the image generated by the imaging.
- the imaging of the discharge stream was performed using a video camera capable of capturing image data of an image size of 2064 ⁇ 1544 and having a guaranteed operating temperature of 70°C.
- a video camera was used to take two images of the discharged flow at different times.
- An example in which the ejection speed v tap and the melt height H are detected from the first captured image is Invention Example 1, and an example in which the ejection speed v tap and the melt height H are detected from the second captured image is the invention. Take example 2.
- FIG. 4 is an image showing the discharge flow of Inventive Example 1 and Inventive Example 2.
- FIG. 4(a) is an image of the discharge flow of Invention Example 1
- FIG. 4(b) is an image of the discharge flow of Invention Example 2.
- FIG. 4S. 4(a) and 4(b) the surface layer of the exhaust flow, that is, the interface between the exhaust flow and the outside air is not smooth but has an irregularly wavy shape. This indicates that the surface layer of the discharge flow is subject to strong viscous resistance from the inner wall of the discharge hole and the outside air, so that the discharge flow is turbulent only in the vicinity of the surface layer of the discharge flow.
- the calculation method according to the present invention is more accurate than the conventional method of estimating the flow velocity from the position change of the image, for example. confirmed.
- the discharge distance L tap and the tap hole height h tap were measured from the image, and the discharge speed v tap was calculated using these.
- Table 1 below shows the measurement results of the discharge distance L tap , the tap hole height h tap , the tap hole inclination angle ⁇ tap and the discharge speed v tap .
- melt height H in Invention Examples 1 and 2 was calculated using the discharge speed v tap .
- Each parameter used when calculating the melt height H is shown in Table 2 below.
- FIG. 5 is a graph showing the detection results of the melt height H in Invention Examples 1 and 2.
- the melt heights H detected in Invention Examples 1 and 2 were both within the height of the tap hole and the height of the tuyere. Furthermore, the melt height H was higher in invention example 2, which has a higher discharge speed than in invention example 1.
- the hot metal slag balance means a value obtained by subtracting the amount of slag produced from the amount of slag tapped in terms of volume.
- a hot metal slag balance of 0 means that the amount of tapped slag is equal to the amount of slag produced.
- the hot metal slag balance is greater than 0, it means that the amount of tapped slag is larger than the amount of slag produced, and the amount of molten material stored in the lower part of the furnace is small, so the molten material height H is low.
- the hot metal slag balance is less than 0, it means that the amount of tapped slag is less than the amount of slag produced, and the amount of molten material stored in the lower part of the furnace increases, so the height H of the molten material increases.
- the amount of ironmaking slag was obtained from the oxygen balance of the blast furnace per unit time, the percentage of oxygen contained in iron oxide in the raw material charged from the top of the furnace, and the percentage of gangue in the charged raw material. Specifically, the pig iron production amount was calculated using the following formula (11), the slag production amount was calculated using the following formula (12), and the iron production slag amount was calculated by adding these values.
- Wp is the pig iron production amount (t/hour)
- Ws is the slag production amount ( t /hour).
- N top is the amount of oxygen atoms per hour in the top gas (mol/hour)
- N tuy is the amount of oxygen atoms per hour blown from the tuyeres (mol/hour).
- R Fe/O is the average number ( ⁇ ) of iron atoms per oxygen atom in the iron oxide in the raw material charged from the furnace top
- M Fe is the molar mass of iron (t/mol).
- R FeHM is the mass fraction (-) of iron in hot metal
- R G/Fe is the mass of charged gangue per ton of hot metal (t/hot metal).
- N top is obtained by analyzing the components of the furnace top gas.
- N tuy can be obtained by analyzing the components of the blast gas blown from the tuyeres.
- R Fe/O and R G/Fe can be obtained by analyzing the composition of raw materials charged from the top of the furnace.
- R FeHM is obtained by component analysis of hot metal tapped from the tap hole.
- Fig. 6 is a graph showing the time change of the molten iron slag balance.
- the time of invention example 1 shown in FIG. 6 is the time when the discharge flow was imaged as invention example 1.
- the time of invention example 2 is the time when the discharge flow was imaged as invention example 2.
- FIG. 6 is a graph showing the time change of the molten iron slag balance.
- the time of invention example 1 shown in FIG. 6 is the time when the discharge flow was imaged as invention example 1.
- the time of invention example 2 is the time when the discharge flow was imaged as invention example 2.
- the amount of molten material stored in the lower part of the furnace increases from the time of Invention Example 1 to the time of Invention Example 2. Therefore, the height H of the molten material stored in the lower part of the blast furnace is higher at the time of invention example 2 than at the time of invention example 1.
- the melt height H detected by the melt height detection method according to the present embodiment is also higher in Invention Example 2 than in Invention Example. The trends coincided.
- the melt height balance is calculated from the hot metal balance and the slag balance.
- the hot metal balance is the value obtained by subtracting the amount of tapped iron (t) from the amount of pig iron (t) in the target tapped iron
- the slag balance is the amount of slag output from the amount of slag (t). It is the value after subtracting (t). If these balance values are negative, it indicates that the amount of molten iron slag in the furnace increases, and if positive, it indicates that it decreases.
- these balances are weights (t)
- they can be converted to melt height balances by dividing these balance values by the density and the cross-sectional area of the hearth.
- the molten iron balance, the slag balance, and the following equation (13) were used to calculate the melt height balance.
- Molten material height balance [hot metal balance (t)/hot metal density (kg/m 3 ) + slag balance (t)/molten slag density (kg/m 3 )]/hearth effective cross-sectional area (m 2 ) ⁇ (13)
- Table 3 below shows the hot metal balance, the slag balance, and the melt height balance calculated using these at the time of Invention Example 1 and at the time of Invention Example 2 shown in FIG.
- the effective cross-sectional area of the hearth (m 2 ) in the above equation (13) was calculated by multiplying the cross-sectional area of the furnace lower part by the porosity, taking the porosity of the lower part of the furnace as 0.35 based on the past results.
- the melt height difference of 1.63 m calculated from this melt height balance the difference between the melt height of Invention Example 1 and the melt height of Invention Example 2 shown in FIG. I know it will be. From this result, it was confirmed that the melt height in the blast furnace can be detected with high accuracy by using the melt height detection method according to the present embodiment.
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Abstract
Description
(1)炉下部に溶融物を排出する排出孔を有する溶鉱炉の溶融物高さの検出方法であって、前記排出孔から排出される溶融物の排出距離を測定し、前記排出距離と、前記排出孔の高さと、前記溶融物の排出角度と、を用いて前記排出孔から排出される前記溶融物の排出速度を算出し、前記排出速度を用いて前記溶融物高さを検出する、溶融物高さの検出方法。
(2)前記排出孔の高さを測定する、(1)に記載の溶融物高さの検出方法。
(3)前記排出孔から排出されるまでに前記溶融物が前記排出孔から受ける抵抗力と、前記排出速度とを用いて前記溶融物高さを検出する、(1)または(2)に記載の溶融物高さの検出方法。
上記(6)式のρlは溶融物12の密度(kg/m3)であり、vtapは溶融物12の排出速度(m/s)であり、P1は炉内ガス圧力(Pa)であり、gは重力加速度(9.8m/s2)であり、Hは炉下部に貯留される溶融物12の高さ(m)であり、P2は出銑孔14出口のガス圧力(Pa)であり、htapは出銑孔14の高さ(m)である。
上記(7)式のftapは出銑孔14の管摩擦係数(-)であり、Wtapは出銑孔14の長さ(m)であり、Dtapは出銑孔14の内径(m)であり、Keは管入口損失係数(-)である。なお、(-)は無次元であることを意味する。
上記(9)式のμは溶融物12の粘度(Pa・s)である。溶融物12の粘度μは溶銑および溶滓の粘度を混合率で按分して算出される。溶銑および溶滓の粘度は過去の実績値を用いてよく、また、溶滓の粘度はCaO、MgO、Al2O3、SiO2、FeOなどの成分濃度と温度とから推定する非特許文献1に記載されている方法を用いて推定してもよい。
12 溶融物
14 出銑孔
16 排出流
18 樋
20 液面
30 物体
Claims (3)
- 炉下部に溶融物を排出する排出孔を有する溶鉱炉の溶融物高さの検出方法であって、
前記排出孔から排出される溶融物の排出距離を測定し、
前記排出距離と、前記排出孔の高さと、前記溶融物の排出角度と、を用いて前記排出孔から排出される前記溶融物の排出速度を算出し、
前記排出速度を用いて前記溶融物高さを検出する、溶融物高さの検出方法。 - 前記排出孔の高さを測定する、請求項1に記載の溶融物高さの検出方法。
- 前記排出孔から排出されるまでに前記溶融物が前記排出孔から受ける抵抗力と、前記排出速度とを用いて前記溶融物高さを検出する、請求項1または請求項2に記載の溶融物高さの検出方法。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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EP21933311.9A EP4282987A1 (en) | 2021-03-26 | 2021-12-27 | Method for detecting height of molten material |
JP2022509614A JP7056813B1 (ja) | 2021-03-26 | 2021-12-27 | 溶融物高さの検出方法 |
KR1020237031144A KR20230145157A (ko) | 2021-03-26 | 2021-12-27 | 용융물 높이의 검출 방법 |
CN202180095703.5A CN116981783A (zh) | 2021-03-26 | 2021-12-27 | 熔融物高度的检测方法 |
BR112023017992A BR112023017992A2 (pt) | 2021-03-26 | 2021-12-27 | Método de detecção de altura de material fundido |
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JP2021-052876 | 2021-03-26 | ||
JP2021052876 | 2021-03-26 |
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JP2003155507A (ja) * | 2001-11-22 | 2003-05-30 | Nippon Steel Corp | 高炉内の銑滓レベル評価方法及び評価装置 |
JP2015206107A (ja) * | 2014-04-08 | 2015-11-19 | 新日鐵住金株式会社 | 高炉状態解析装置、高炉状態解析方法、およびプログラム |
JP2017160498A (ja) | 2016-03-10 | 2017-09-14 | 株式会社神戸製鋼所 | 竪型炉における溶融物レベルの推定方法、及びその推定装置 |
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JP2003155507A (ja) * | 2001-11-22 | 2003-05-30 | Nippon Steel Corp | 高炉内の銑滓レベル評価方法及び評価装置 |
JP2015206107A (ja) * | 2014-04-08 | 2015-11-19 | 新日鐵住金株式会社 | 高炉状態解析装置、高炉状態解析方法、およびプログラム |
JP2017160498A (ja) | 2016-03-10 | 2017-09-14 | 株式会社神戸製鋼所 | 竪型炉における溶融物レベルの推定方法、及びその推定装置 |
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