WO2023008170A1 - 高炉のスラグレベル推定方法、操業ガイダンス方法、溶銑の製造方法、高炉のスラグレベル推定装置及び操業ガイダンス装置 - Google Patents
高炉のスラグレベル推定方法、操業ガイダンス方法、溶銑の製造方法、高炉のスラグレベル推定装置及び操業ガイダンス装置 Download PDFInfo
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- Prior art keywords
- slag
- blast furnace
- level
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- low
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- 239000002893 slag Substances 0.000 title claims abstract description 175
- 238000000034 method Methods 0.000 title claims abstract description 45
- 239000002184 metal Substances 0.000 title claims abstract description 29
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 54
- 238000010079 rubber tapping Methods 0.000 claims abstract description 32
- 239000000155 melt Substances 0.000 claims abstract description 19
- 238000003860 storage Methods 0.000 claims description 35
- 230000009471 action Effects 0.000 claims description 33
- 230000005540 biological transmission Effects 0.000 claims description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- 230000035699 permeability Effects 0.000 claims description 14
- 238000004364 calculation method Methods 0.000 claims description 12
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 239000012466 permeate Substances 0.000 claims description 5
- 238000009423 ventilation Methods 0.000 claims description 5
- 229910000805 Pig iron Inorganic materials 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 11
- 238000004088 simulation Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 6
- 239000004065 semiconductor Substances 0.000 description 6
- 238000005259 measurement Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005401 electroluminescence Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
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- 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
- C21B7/24—Test rods or other checking devices
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- 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
- F27D19/00—Arrangements of controlling 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
-
- 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
- F27D21/0028—Devices for monitoring the level of the melt
-
- 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
- F27D21/02—Observation or illuminating 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
- F27D19/00—Arrangements of controlling devices
- F27D2019/0028—Regulation
- F27D2019/0071—Regulation using position sensors
Definitions
- the present disclosure relates to a blast furnace slag level estimation method, an operation guidance method, a molten iron production method, a blast furnace slag level estimation device, and an operation guidance device.
- the liquid level of slag (hereinafter also simply referred to as "slag level”) is an important management index.
- slag level gas permeability in the furnace of the blast furnace deteriorates. If the slag level rises to a significant extent, it can lead to tuyere failure.
- the factors that increase the slag level are thought to be a decrease in the porosity of the coke packed bed at the bottom of the furnace and an increase in slag viscosity due to a decrease in the temperature at the bottom of the furnace.
- Operational actions to reduce the slag level include adjusting the basicity (CaO/SiO 2 ) of the charge to reduce the viscosity of the slag and reducing the slag generation rate by reducing the wind. be.
- Patent Document 1 a plurality of measurement electrode groups arranged in the height direction are installed over the outer periphery of the furnace, and based on the electrical resistance, the melt level in the furnace is measured near the installation position of each measurement electrode group. Disclose how.
- Patent Document 1 can accurately measure the liquid level, but the measurement target is limited to the liquid level near the furnace wall. Also, as a conventional technique, there is an estimation method of calculating the slag level based on the mass balance, but it is limited to estimating the average slag level of the furnace cross section, and it is difficult to estimate local changes.
- a blast furnace slag level estimation method includes: At least one of tapping speed, slag output speed, ironmaking speed, and slag-making speed is input, and using a physical model based on a mass balance that assumes the existence of a low-permeability phase at the bottom of the furnace that makes it difficult for slag to permeate, the above Calculating the liquid level of the slag-containing melt for each of a plurality of regions separated by the low-permeability phase.
- An operation guidance method includes The step of presenting an operator with an operation action for reducing ventilation resistance based on the liquid surface level of the melt calculated by the blast furnace slag level estimation method described above.
- a method for producing hot metal according to an embodiment of the present disclosure includes: Hot metal is produced according to the operational actions presented by the operational guidance method described above.
- a blast furnace slag level estimation device includes: A storage unit that receives at least one of tapping speed, slag output speed, ironmaking speed, and slag-making speed as an input and stores a physical model based on a mass balance that assumes the existence of a low-permeability phase at the bottom of the furnace through which slag hardly permeates. and, and a liquid level calculation unit that calculates a liquid level of the melt containing slag for each of the plurality of regions separated by the low-permeability phase using the physical model.
- An operation guidance device includes An operation action presenting unit is provided for presenting an operation action for reducing ventilation resistance to an operator based on the liquid surface level of the melt calculated by the blast furnace slag level estimation device.
- a blast furnace slag level estimation method and a blast furnace slag level estimation device capable of estimating the liquid level of slag with high accuracy. Further, according to the present disclosure, it is possible to provide an operation guidance method, a hot metal production method, and an operation guidance device for guiding the operation of a blast furnace based on the highly accurately estimated slag liquid level.
- FIG. 1 is a diagram showing input/output information of a physical model used in the present disclosure.
- FIG. 2 is a diagram illustrating the configuration of a blast furnace.
- FIG. 3 is a diagram illustrating the correlation of tap hole deviation in an actual blast furnace.
- FIG. 4 is a diagram showing one result of a simulation using a physical model.
- FIG. 5 is a diagram showing a comparison result between the correlation using the physical model and the correlation of the actual data.
- FIG. 6 is a diagram illustrating the relationship between the area ratio of a plurality of regions and the amount of ⁇ slag.
- FIG. 7 is a diagram showing one result of a simulation using a physical model that reflects the daily position of the low-permeability phase.
- FIG. 8 is a diagram showing the correlation between ventilation resistance and slag level.
- FIG. 9 is a diagram showing a configuration example of a blast furnace slag level estimation device and an operation guidance device according to one embodiment.
- FIG. 10 is a flowchart showing a blast furnace slag level estimation method according to an embodiment.
- FIG. 11 is a flowchart illustrating an operational guidance method according to one embodiment.
- the physical model used in the present disclosure is a physical model capable of calculating the state inside the blast furnace.
- the physical model used in the present disclosure is based on reference 1 (Yoshitaka Sawa et al., "Influence of bottom temperature distribution and tapping slag of low liquid permeability region in blast furnace hearth", Tetsu to Hagane, vol.78 , p. 1171), this model assumes the existence of a low-permeability phase (low-permeability region) in the lower part of the furnace.
- the low-permeability phase is a region in which the porosity of the coke packed bed in the lower part of the furnace has decreased and the liquid permeability has deteriorated extremely.
- the lower part of the furnace is separated by a low-permeability phase.
- the low-permeability phase cannot be directly observed, it is thought that the low-permeability phase exists in large-scale blast furnaces where the liquid level is non-uniform.
- the physical model used in the present disclosure determines the position of the low-permeability phase and, when input is given, outputs the liquid level of the melt in each region divided by the low-permeability phase as an output.
- the physics model is input with areas of both sides, ironmaking and slag making speeds (ironmaking speed and slag making speed), and tap closing time (taper hole closing time).
- the physical model includes tapping/slag tapping speed (tapping speed and slag tapping speed), slag/hot metal liquid level (slag liquid level and hot metal liquid level), Outputs hot metal/slag amount (hot metal amount and slag amount) and tap cycle time.
- the sides are two regions separated by a low transmission phase as in FIG. A taphole is provided in each of the two zones and the blast furnace process is carried out such that one is open and the other is closed.
- Tap means tapping or taphole.
- the tap cycle time is calculated based on this determination. be done.
- the blast furnace is a large blast furnace (eg, 5000m3 class, 9000mm radius) and has four tapholes as shown in FIG.
- the number of tap holes in the blast furnace is not limited to four, and may be two or more.
- the tapholes are divided into two groups: two tapholes on the south side (No. 2 and No. 3) and two tapholes on the north side (No. 1 and No. 4).
- the south and north tapholes are used alternately, as described above.
- the slag levels in each of the south and north regions are estimated assuming the existence of a low permeability phase between the south and north regions.
- Fig. 3 is a diagram exemplifying the correlation of the tap hole deviation in an actual blast furnace.
- the ⁇ slag amount on the horizontal axis of FIG. 3 indicates the tap hole deviation (area deviation) of the slag amount.
- the ⁇ slag amount indicates the difference in the slag output amount in each of the plurality of regions.
- the deviation is calculated based on the value obtained by subtracting the south side (No. 2 and No. 3) from the north side (No. 1 and No. 4). That is, the ⁇ slag amount is obtained using a value obtained by subtracting the amount of slag output from the south side from the amount of slag output from the north side.
- ⁇ slag ratio, ⁇ hot metal amount, and ⁇ tapping time on the vertical axis of FIG. 3 are similarly calculated based on the values obtained by subtracting the south side from the north side for the slag ratio, the amount of hot metal, and the tapping time.
- the slag ratio is the ratio of the amount of slag to the amount of hot metal, and is indicated by the amount of slag per ton of hot metal.
- One point plotted in FIG. 3 corresponds to the average value for one day. In each figure, normalization is performed using the average value of the values on the north and south sides.
- the ⁇ slag amount is calculated by (the amount of slag on the north side - the amount of slag on the south side)/((the amount of slag on the north side + the amount of slag on the south side)/2).
- the amount of slag output is large, there is a strong tendency for the amount of tapped iron to be large, the slag ratio to be high, and the tapping time to be long.
- the above correlation of tap hole deviation can be explained by assuming the existence of a low permeability phase.
- a large amount of slag must be discharged from the wide side (the side of the taphole 2) among the plurality of regions separated by the low-permeability phase, so the amount of slag increases.
- the volume of the tapped iron and slag increases, the time required to close the tap hole 2 is also extended.
- the amount of hot metal increases at the tap hole 2 on the side with the larger area.
- the low permeability phase is impermeable to slag, while being highly permeable to hot metal. Therefore, the tap hole deviation of the amount of slag is larger than the tap hole deviation of the amount of hot metal, so the slag ratio is higher at the tap hole 2 side.
- FIG. 4 shows the results of a simulation performed using a physical model under average operating conditions during the operating period shown in FIG.
- the tap closing time is given and the amount of slag and hot metal at each tap is estimated and calculated. That is, tapping speed and slag tapping speed are calculated as outputs of the physical model.
- the low-permeability phase divides the taphole 1 side (north side) and the taphole 2 side (south side) at a ratio of 2:8 in terms of cross-sectional area in the furnace. It is shown that the amount of slag is large on the taphole 2 side with a large area, and the time from the start to the end of tapping is long (especially see the tapping/slag speed (taphole 2) in Fig. 4). .
- the iron-making speed and slag-making speed in an actual blast furnace are the number of raw material layers descending per hour (ch/hour), the amount of hot metal (t/ch) and the amount of slag (t/ch) contained in one charge (ch). It can be obtained by multiplying by ch).
- the tapping speed and the slag output speed can be obtained by linear interpolation based on the data for each tapping cycle.
- FIG. 7 shows the results of estimating (calculating) the liquid levels on the north and south sides by determining the position of the low-permeability phase for each day and using a physical model that reflects the position.
- the liquid level estimated in this way was compared on the north side and the south side, and the higher value was selected as the maximum slag level.
- a comparison between the maximum slag level and the gas flow resistance in the actual blast furnace yielded the correlation shown in the graph labeled (with low permeation phase) in FIG.
- the slag level on the horizontal axis means the maximum slag level.
- R is a correlation coefficient.
- the ventilation resistance increases as the slag level increases. Therefore, a high correlation between the airflow resistance and the slag level means that the estimated slag level is highly accurate.
- the graph labeled (without low-permeability phase) in FIG. 8 is the correlation obtained with the prior art that does not assume the existence of the low-permeability phase.
- the method of this embodiment in which the position is estimated assuming the existence of the low-permeability phase, obtains a higher correlation, and the estimated slag level Accuracy is improved compared to the prior art.
- the operation guidance device (details will be described later) can provide guidance to reduce the slag level when the estimated slag level exceeds the threshold.
- the threshold value is not particularly limited, it may be set to 0.5 m below the tuyere height as an example.
- Guidance may be to suggest operational actions such as adjusting basicity (CaO/SiO 2 ) on the charge to reduce slag viscosity, reducing slag production rate by dewinding. .
- the operation guidance device presents appropriate operation actions to the operator, thereby avoiding operational troubles (eg, tuyere damage).
- FIG. 9 is a diagram showing a configuration example of the blast furnace slag level estimation device 10 and the operation guidance device 20 according to one embodiment.
- the blast furnace slag level estimation device 10 includes a storage unit 11 , a low transmission phase position calculation unit 12 , and a liquid level calculation unit 13 .
- the operation guidance device 20 includes a storage section 21 and an operation action presentation section 22 .
- the blast furnace slag level estimation device 10 acquires various measurement values (also referred to as actual measurements) from a sensor or the like provided in the blast furnace, estimates the position assuming the existence of a low permeability phase, and reflects it. Calculations are performed using the above physical model.
- the operation guidance device 20 causes the display unit 30 to display an operation action as guidance when the estimated slag level exceeds the threshold.
- the display unit 30 may be a display device such as a liquid crystal display or an organic electroluminescence panel.
- the storage unit 11 stores a physical model based on a mass balance that assumes the existence of a low-permeability phase in the bottom of the furnace through which slag is less likely to permeate.
- the storage unit 11 also stores a program and data regarding calculation of the liquid level of the melt containing slag in the blast furnace.
- the storage unit 11 may include any storage device such as a semiconductor storage device, an optical storage device, and a magnetic storage device.
- a semiconductor storage device may include, for example, a semiconductor memory.
- the storage unit 11 may include multiple types of storage devices.
- the low transmission phase position calculation unit 12 uses the relationship between the area ratio of the plurality of regions and the ⁇ slag amount, which is the difference in the slag amount of slag in each of the plurality of regions (see FIG. 6), to determine the most recent predetermined
- the position of the low transmission phase is calculated based on the delta slag amount for the period.
- the relationship between the area ratios of the plurality of regions and the amount of delta slag is a linear relationship as described above, and the storage unit 11 may store an equation representing this linear relationship.
- the low-transmittance phase position calculator 12 may read, for example, a relational expression from the storage unit 11 and predict (calculate) the position of the low-transmittance phase based on the ⁇ slag amount in the most recent predetermined period.
- the predetermined period is one day as described above, and the position of the low transmission phase is estimated by the low transmission phase position calculator 12 for each day.
- the predetermined period is not limited to one day, and may be a period longer than one day or a period shorter than one day.
- the liquid level calculator 13 uses a physical model to input at least one of tapping speed, slag tapping speed, ironmaking speed, and slag making speed, and calculates for each of a plurality of regions separated by the low-permeability phase. Calculate the liquid level of the melt.
- the physical model is a model that reflects the position of the low transmission phase calculated by the low transmission phase position calculator 12 .
- the melt level includes the slag level and the hot metal level.
- the liquid level calculator 13 outputs the calculated liquid level of the melt to the operation guidance device 20 .
- the storage unit 21 stores programs and data relating to operational guidance.
- the storage unit 21 may include any storage device such as a semiconductor storage device, an optical storage device, and a magnetic storage device.
- a semiconductor storage device may include, for example, a semiconductor memory.
- the storage unit 21 may include multiple types of storage devices.
- the operational action presentation unit 22 determines whether the estimated slag level exceeds the threshold value based on the liquid surface level of the melt calculated by the slag level estimation device 10 for the blast furnace. When determining that the slag level exceeds the threshold, the operation action presentation unit 22 causes the display unit 30 to display an operation action for lowering the slag level. The operation action presentation unit 22 may cause the display unit 30 to display, for example, reducing the slag generation speed by reducing the wind as an operation action.
- the operator may change the operating conditions of the blast furnace according to the operating actions shown on the display unit 30.
- Such blast furnace operating guidance can be implemented as part of a manufacturing process for producing hot metal.
- the computer that manages the production of hot metal may automatically change the conditions of production of hot metal according to the operational actions presented by the operation guidance device 20 .
- the blast furnace slag level estimation device 10 and the operation guidance device 20 may be realized by a computer such as a process computer that controls the operation of the blast furnace or the production of hot metal, for example.
- a computer includes, for example, a memory and a hard disk drive (storage device), a CPU (processing unit), and a display device such as a display.
- An operating system (OS) and application programs for performing various processes can be stored in a hard disk drive, and read from the hard disk drive into memory when executed by the CPU.
- data in the process of being processed is stored in the memory, and if necessary, is stored in the HDD.
- Various functions are realized by organically cooperating hardware such as a CPU and memory with an OS and necessary application programs.
- the storage unit 11 and the storage unit 21 may be realized by, for example, a storage device.
- the low transmission phase position calculation unit 12, the liquid level calculation unit 13, and the operation action presentation unit 22 may be realized by, for example, a CPU.
- the display unit 30 may be realized by, for example, a display device.
- FIG. 10 is a flowchart showing a blast furnace slag level estimation method according to one embodiment.
- the blast furnace slag level estimation device 10 outputs the estimated liquid level according to the flowchart shown in FIG.
- the blast furnace slag level estimation method shown in FIG. 10 may be executed as part of the method for producing hot metal.
- the low transmission phase position calculator 12 calculates the low transmission phase position based on the ⁇ slag amount for the most recent predetermined period (step S1).
- the liquid level calculator 13 calculates the liquid level of the melt containing slag for each of a plurality of regions separated by the low-permeable phase using a physical model that reflects the position of the low-permeable phase calculated in step S1.
- Calculate (step S2) As shown in FIG. 10, the step of calculating the low transmission phase position is performed before the step of calculating the melt level.
- step S1 may be performed, for example, once a day (daily estimation of the position of the low transmission phase), and step S2 may be performed many times a day.
- the tapping speed, slag tapping speed, ironmaking speed and slag making speed input to the physical model may be measured or calculated every 10 minutes, and step S2 may be executed every 10 minutes.
- FIG. 11 is a flowchart showing an operation guidance method according to one embodiment.
- the operational guidance device 20 presents operational actions according to the flowchart shown in FIG.
- the operational guidance method shown in FIG. 11 may be executed as part of the hot metal manufacturing method.
- the operating action presentation unit 22 presents an operating action for lowering the slag level when determining that the slag level exceeds the threshold based on the calculated liquid surface level of the melt (step S11).
- the blast furnace slag level estimation method and the blast furnace slag level estimation device 10 according to the present embodiment can estimate the slag liquid level with high accuracy due to the above configuration. Further, the operation guidance method, the method for manufacturing molten iron, and the operation guidance device 20 according to the present embodiment can guide the operation of the blast furnace based on the slag surface level estimated with high accuracy. For example, the operator can avoid operational troubles (eg tuyere breakage) by following the operational actions shown as guidance.
- operational troubles eg tuyere breakage
- the configuration of the blast furnace slag level estimation device 10 and the operation guidance device 20 shown in FIG. 9 is an example.
- the blast furnace slag level estimation device 10 and the operation guidance device 20 may not include all of the components shown in FIG. Further, the blast furnace slag level estimation device 10 and the operation guidance device 20 may include components other than those shown in FIG.
- the operation guidance device 20 may be configured to further include a display section 30 .
- the operation action presentation unit 22 of the operation guidance device 20 causes the display unit 30 to display the operation action when determining that the slag level exceeds the threshold.
- the operation action presentation unit 22 causes the display unit 30 to display the operation action even if the slag level does not exceed the threshold, and if the slag level exceeds the threshold, the content of the operation action is displayed, and the slag level is lowered. You can change it to whatever you want. For example, when the slag level does not exceed the threshold, the operation action presentation unit 22 may cause the display unit 30 to display an operation action indicating that wind reduction is not required and the current setting may be used.
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Abstract
Description
出銑速度、出滓速度、造銑速度及び造滓速度の少なくとも1つを入力とし、炉底部にスラグを透過しにくい低透過相の存在を仮定する物質収支に基づく物理モデルを用いて、前記低透過相によって区切られた複数の領域ごとにスラグを含む溶融物の液面レベルを算出するステップを含む。
上記の高炉のスラグレベル推定方法によって算出された前記溶融物の液面レベルに基づき、通気抵抗を低下させるための操業アクションをオペレータに提示するステップを含む。
上記の操業ガイダンス方法によって提示される前記操業アクションに従って溶銑を製造する。
出銑速度、出滓速度、造銑速度及び造滓速度の少なくとも1つを入力とし、炉底部にスラグを透過しにくい低透過相の存在を仮定する物質収支に基づく物理モデルを記憶する記憶部と、
前記物理モデルを用いて、前記低透過相によって区切られた複数の領域ごとにスラグを含む溶融物の液面レベルを算出する液面レベル算出部と、を備える。
上記の高炉のスラグレベル推定装置によって算出された前記溶融物の液面レベルに基づき、通気抵抗を低下させるための操業アクションをオペレータに提示する操業アクション提示部を備える。
11 記憶部
12 低透過相位置算出部
13 液面レベル算出部
20 操業ガイダンス装置
21 記憶部
22 操業アクション提示部
30 表示部
Claims (7)
- 出銑速度、出滓速度、造銑速度及び造滓速度の少なくとも1つを入力とし、炉底部にスラグを透過しにくい低透過相の存在を仮定する物質収支に基づく物理モデルを用いて、前記低透過相によって区切られた複数の領域ごとにスラグを含む溶融物の液面レベルを算出するステップを含む、高炉のスラグレベル推定方法。
- 前記溶融物の液面レベルは、スラグの液面レベル及び溶銑の液面レベルを含む、請求項1に記載の高炉のスラグレベル推定方法。
- 前記複数の領域の面積比と、前記複数の領域のそれぞれにおけるスラグの出滓量の差であるΔスラグ量との関係を用いて、直近の所定期間の前記Δスラグ量に基づいて、前記低透過相の位置を算出するステップを含み、
前記低透過相の位置を算出するステップは、前記溶融物の液面レベルを算出するステップの前に実行される、請求項1又は2に記載の高炉のスラグレベル推定方法。 - 請求項1から3のいずれか一項に記載の高炉のスラグレベル推定方法によって算出された前記溶融物の液面レベルに基づき、通気抵抗を低下させるための操業アクションをオペレータに提示するステップを含む、操業ガイダンス方法。
- 請求項4に記載の操業ガイダンス方法によって提示される前記操業アクションに従って溶銑を製造する、溶銑の製造方法。
- 出銑速度、出滓速度、造銑速度及び造滓速度の少なくとも1つを入力とし、炉底部にスラグを透過しにくい低透過相の存在を仮定する物質収支に基づく物理モデルを記憶する記憶部と、
前記物理モデルを用いて、前記低透過相によって区切られた複数の領域ごとにスラグを含む溶融物の液面レベルを算出する液面レベル算出部と、を備える、高炉のスラグレベル推定装置。 - 請求項6に記載の高炉のスラグレベル推定装置によって算出された前記溶融物の液面レベルに基づき、通気抵抗を低下させるための操業アクションをオペレータに提示する操業アクション提示部を備える、操業ガイダンス装置。
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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 |
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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 |
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