WO2018020929A1 - 排滓重量推定方法及び排滓重量推定装置 - Google Patents
排滓重量推定方法及び排滓重量推定装置 Download PDFInfo
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- WO2018020929A1 WO2018020929A1 PCT/JP2017/023437 JP2017023437W WO2018020929A1 WO 2018020929 A1 WO2018020929 A1 WO 2018020929A1 JP 2017023437 W JP2017023437 W JP 2017023437W WO 2018020929 A1 WO2018020929 A1 WO 2018020929A1
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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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0087—Treatment of slags covering the steel bath, e.g. for separating slag from the molten metal
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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
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/02—Dephosphorising or desulfurising
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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
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/04—Removing impurities other than carbon, phosphorus or sulfur
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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 disclosed technology relates to a waste weight estimation method and a waste weight estimation device for estimating the weight of slag discharged from a converter.
- the converter After performing desiliconization treatment to remove silicon as an impurity from the molten iron in the converter or dephosphorization treatment to remove phosphorus as an impurity, the converter is tilted while the molten iron remains in the converter. Part of the upper slag from the mouth flows down to the slag pan located below the converter and is evacuated. After that, the converter is erected again, and auxiliary raw materials such as quick lime (CaO is the main component) are added.
- auxiliary raw materials such as quick lime (CaO is the main component) are added.
- the slag is formed (bubbled) in the converter to increase the bulk volume of the slag, thereby making it easy to remove the slag and securing the weight of the slag.
- slag forming is caused by carbon monoxide (CO) gas generated by the reaction of carbon (C) in molten iron and iron oxide (FeO) in slag during desiliconization or dephosphorization. It is generated by being held by the slag.
- CO carbon monoxide
- the converter After the slag is discharged, the converter is kept upright and auxiliary raw materials such as quick lime are added to continue the refining of the molten iron.
- auxiliary raw materials such as quick lime are added to continue the refining of the molten iron.
- the addition amount of the auxiliary raw material is determined in accordance with the residual slag weight in the furnace. Therefore, if the estimation accuracy of the residual slag weight in the furnace is low, the addition amount of the auxiliary raw material becomes excessive or insufficient. For example, when the estimated value of the residual slag weight in the furnace is larger than the actual weight, the cost is deteriorated due to the excessive addition of the auxiliary raw material.
- auxiliary materials are often added excessively.
- the excessive addition of the auxiliary material has problems such as an increase in the amount of the auxiliary material used, an increase in the slag weight, an increase in heat loss, and a deterioration in cost due to a deterioration in iron yield.
- the estimation of the slag drainage weight or the residual slag weight in the furnace has been carried out by visual observation by an operator or by weighing with a weighing machine installed on the trolley truck.
- the slag formed during slag drainage calms down and the bulk density of the slag changes every moment, there is a problem that the accuracy of the drainage weight estimation by the operator is low.
- the formed slag may overflow beyond the capacity of the slag pan and damage the weighing machine, increasing the equipment maintenance load of the weighing machine.
- the weighing accuracy of the weighing machine deteriorates due to the vibration of the waste cart, etc.
- JP-A-2007-308773 finds that there is a correlation between the tilt angle of the converter and the residual slag weight in the furnace.
- a method for estimating the in-furnace residual slag weight is disclosed. However, this method uses the relationship between the tilt angle of the converter and the volume of slag remaining in the furnace, and the slag is not formed after decarburization treatment, that is, slag with a constant bulk density. Is assumed to be applied. For this reason, the method described in Japanese Patent Application Laid-Open No. 2007-308773 cannot be applied to the formed slag after desiliconization or dephosphorization.
- the disclosed technology provides a waste weight estimation method and a waste weight estimation device that easily and accurately estimates the weight of slag accompanied by forming discharged from a converter. For the purpose.
- the inventors of the present application estimate the slag volume flow rate and bulk density change over time from the converter for accurate estimation of the evacuated weight, and the evacuated weight is estimated based on these estimated values. The idea was to make an estimate, and we conducted an extensive study.
- the waste weight estimation method includes a method of tilting the converter after desiliconization treatment or dephosphorization treatment in the converter to leave the molten iron in the converter while leaving the molten iron.
- volume flow rate transition Deriving the volume flow rate transition, deriving the volume density transition estimating the time change of the bulk density of the slag discharged from the converter, and the volume of the slag at each time point corresponding to the volume flow rate transition and the bulk density transition Deriving a value obtained by integrating the product of the flow rate and the bulk density as an estimated value of the weight of slag discharged from the converter.
- the integration is performed over a period from the slag evacuation start time to the evacuation end time.
- the volume flow rate transition may be derived based on a change over time in the tilt angle of the converter when slag is discharged from the converter.
- a first regression equation showing a relationship between the tilting speed of the converter and the volume flow rate of slag discharged from the converter is derived, and the converter of the converter when slag is discharged from the converter is derived.
- the volume flow rate transition may be derived based on the change over time in the tilt angle and the first regression equation.
- At least one of the weight, temperature, and composition of the slag in the converter after the desiliconization process or the dephosphorization process, and the process since the desiliconization process or the dephosphorization process was completed The bulk density transition may be derived based on time.
- a second regression equation showing the relationship with the bulk density of the slag discharged from the converter the weight of the slag in the converter after the desiliconization treatment or the dephosphorization treatment.
- the bulk density transition may be derived based on at least one of the temperature and the composition, the elapsed time from when the desiliconization process or the dephosphorization process is completed, and the second regression equation.
- the waste weight estimation apparatus performs the desiliconization process or the dephosphorization process in the converter, and then tilts the converter to leave the molten iron in the converter.
- a waste weight estimation device for estimating a weight of slag discharged from the converter in a discharge operation for discharging slag from a furnace, wherein a change in volume flow rate of slag discharged from the converter with time is measured.
- a volume flow transition deriving section for deriving an estimated volume flow transition
- a bulk density transition deriving section for deriving a bulk density transition estimating a temporal change in a bulk density of the slag discharged from the converter, and the volume flow transition.
- a waste weight deriving unit for deriving a value obtained by integrating the products at corresponding time points of the bulk density transition as an estimated value of the waste weight of the slag discharged from the converter.
- the disclosed technology makes it easy to estimate the discharge weight of slag discharged from the converter and improves the estimation accuracy. Thereby, the estimation accuracy of the residual slag weight in the furnace is improved, and the auxiliary raw material can be added without excess or deficiency. Due to the above effects, it is possible to reduce costs (reduction of the amount of secondary raw materials used, reduction of the amount of generated slag, suppression of heat loss, improvement of iron yield).
- FIG. 1A is a side cross-sectional view schematically showing a state of a discharge operation in which the converter 1 is tilted and the molten iron 3 is left in the converter 1 and the upper slag 4 is discharged from the furnace port 2.
- FIG. 1B is a front view. If the present inventors can estimate the change over time of the volume flow rate of the slag 4 discharged from the furnace port 2 of the converter 1 and the change over time of the bulk density of the slag 4, the product at each corresponding time point can be expressed as a time axis. The idea is that it is possible in principle to estimate the weight of the slag 4 by integrating along the slag. That is, the waste weight of the slag 4 is expressed by the following equation (1).
- W S is the weight of the slag 4 discharged (ton) from the start of the discharge until time t elapses
- ⁇ S is the bulk density of the slag 4 discharged from the converter 1 (per unit volume).
- Q S volume per volume flow rate per unit time of the slag 4 being Haikasu from the converter 1 [m 3 / sec]
- t is from Haikasu beginning of slag 4 Represents the elapsed time (sec).
- the inventors have found that (1) in order to realize the estimation of Haikasu weight of the slag 4 using type, the volume flow rate Q S and the bulk of the slag 4 being Haikasu from the converter 1 during Haikasu operation The method of estimating the time-dependent change of the density ⁇ S was studied earnestly.
- volume flow rate Q S of slag 4 being Haikasu from the converter 1 during Haikasu operation is believed to be possible to estimate the time course of the tilting angle of the converter 1.
- volumetric flow rate Q S of slag 4 being Haikasu from the converter 1 when the tilting speed of the converter 1 is fast becomes large and the tilting speed of Tenro 1 Conversely slow decreases.
- the volume flow rate Q S of slag 4 being Haikasu from the converter 1 is also influenced by the shape of the converter 1 (volume or throat size).
- the method of obtaining the regression equation by numerical fluid calculation is illustrated, but as an example of another method, a regression equation similar to the above may be obtained by a model experiment in which the tilting speed of the converter 1 is varied. .
- the volume flow rate Q S of slag 4 being Haikasu from the converter 1 is affected by the shape of the converter 1, it is preferable to acquire the regression equation to the converter each.
- the weight and composition of the slag 4 are calculated by mass balance calculation from the amount of silicon contained in the hot metal before desiliconization or dephosphorization and the amount of auxiliary raw materials such as quick lime added during the desiliconization or dephosphorization. it can.
- the temperature can be measured, but may be estimated by heat balance calculation.
- the elapsed time after processing can be measured. Therefore, the bulk density ⁇ S of the slag 4 can be estimated in principle from the weight, temperature and composition of the slag 4 in the converter 1 after the desiliconization process or the dephosphorization process, and the elapsed time after the process.
- estimation of the change with time of the bulk density ⁇ S of the slag 4 discharged from the converter 1 during the discharge operation can be performed as follows, for example.
- a furnace is used during the discharge of slag 4 under the condition that the weight, temperature and composition of slag 4 in converter 1 and the elapsed time after treatment are changed within the range of normal operating conditions.
- the slag 4 flowing down from the mouth 2 is sampled, the bulk density ⁇ S of the slag 4 is measured, and a regression equation that associates these relationships is created.
- a regression equation is created in which the weight, temperature and composition of the slag 4 in the converter 1 and the elapsed time after processing are input conditions (explanatory variables), and the bulk density ⁇ S of the slag 4 is output (objective variable).
- the bulk density of the slag 4 discharged from the converter 1 is substituted by substituting the weight, temperature, composition, and elapsed time after treatment into the above regression equation. to derive the bulk density transition estimating the temporal change of the ⁇ S.
- the bulk density ⁇ S of the slag 4 can be measured by performing the following processes (1) to (3).
- (1) The slag 4 flowing down from the furnace port 2 is collected using a slag collection container capable of rapidly cooling the slag 4.
- (2) The collected slag 4 is pulverized, the iron particles inevitably mixed in the slag 4 are removed, and the weight of the slag 4 is measured.
- (3) The weight of the measured slag 4 is divided by the volume of the slag collection container.
- the reason why the granular iron is inevitably mixed in the slag 4 is because the granular iron having a diameter of about several mm or less, which is separated from the molten iron bath by stirring in the converter 1, is suspended in the slag 4.
- the granular iron is mixed in the slag 4 by several tens of weight%. Since the density of the granular iron is several tens of times higher than the density of the forming slag 4, the weight is greatly affected, but the volume is hardly affected. Therefore, if the granular iron is removed, the bulk density ⁇ S of the slag 4 can be measured almost accurately.
- Converter 1 from Haikasu is the slag 4 of the volume flow Q volume was estimated changes with time of S flow transition and the converter 1 bulk density transition estimating the time course of the bulk density [rho S of slag 4 being Haikasu from The value obtained by integrating the products at the corresponding time points along the time axis is the estimated value of the waste weight of the slag 4 discharged from the converter 1.
- FIG. 2 is a functional block diagram showing the configuration of the waste weight estimation apparatus 10 according to the embodiment of the present invention that estimates the waste weight of the slag using the waste weight estimation method according to the embodiment of the present invention described above. is there.
- the waste weight estimation apparatus 10 includes a volume flow rate transition deriving unit 11, a bulk density transition deriving unit 12, and a waste weight deriving unit 13.
- the volume flow rate transition deriving unit 11 inputs the volume flow rate Q S of the slag 4 discharged from the converter 1 based on the information indicating the change with time of the tilt angle of the converter 1 during the discharge operation input from the outside. Determining the volume flow rate transition that estimated the change with time. Volume flow changes deriving unit 11, the tilting speed of the converter 1 and an explanatory variable, the volumetric flow rate Q S of slag 4 being Haikasu from the converter 1 to a first regression equation of interest variables, input from the outside The volume flow transition is derived by substituting the time-dependent change of the tilt angle of the converter 1 indicated by the information.
- the bulk density transition deriving unit 12 receives information on the weight, temperature, and composition of the slag 4 in the converter 1 input from the outside, and the elapsed time from the time when the desiliconization process or the dephosphorization process is completed (the elapsed time after the process). Based on the information indicating the above, the transition of the bulk density estimated from the change with time of the bulk density ⁇ S of the slag 4 discharged from the converter 1 is derived.
- the bulk density transition deriving unit 12 uses the weight, temperature, composition, and post-treatment elapsed time of the slag 4 in the converter 1 as explanatory variables, and the second regression equation using the bulk density ⁇ S of the slag 4 as an objective variable.
- the bulk density transition is derived by substituting the weight, temperature and composition of the slag 4 in the converter 1 indicated by information input from the outside, and the elapsed time after treatment.
- the information which shows the time-dependent change of the tilt angle of the converter 1 and the information which shows the elapsed time after processing have the same time point as the time zero point, and the temporal correspondence between the two can be recognized.
- the waste weight deriving unit 13 calculates the product of the volume flow rate transition derived by the volume flow rate transition deriving unit 11 and the bulk density transition derived by the bulk density transition deriving unit 12 as shown in the equation (1).
- a value integrated along the time axis is derived as an estimated value of the waste weight of the slag 4 discharged from the converter 1 in the discharge operation.
- the reject weight estimation device 10 can be realized by, for example, the computer 20 shown in FIG.
- the computer 20 includes a CPU (Central Processing Unit) 21, a main storage device 22 that provides a temporary storage area, an auxiliary storage device 23 that provides a nonvolatile storage area, and an input / output interface (I / F) 24.
- the CPU 21, main storage device 22, auxiliary storage device 23, and input / output I / F 24 are connected to each other via a bus 25.
- the auxiliary storage device 23 can be realized by a hard disk drive (HDD), a solid state drive (SSD), a flash memory, or the like.
- the auxiliary storage device 23 stores a waste weight estimation program 30 for causing the computer 20 to function as the waste weight estimation device 10, and the first regression equation 31 and the second regression equation 32 described above.
- the CPU 21 reads the waste weight estimation program 30 from the auxiliary storage device 23, develops it in the main storage device 22, and sequentially executes the processes described in the waste weight estimation program 30, whereby the volume flow rate transition deriving unit 11, It functions as a bulk density transition deriving unit 12 and a waste weight deriving unit 13.
- FIG. 4 is a flowchart showing a flow of processing performed in the CPU 21 that executes the reject weight estimation program 30.
- step S ⁇ b> 1 the CPU 21 discharges from the converter 1 based on information indicating the change over time in the tilt angle of the converter 1 during the discharge operation input from the outside via the input / output interface (I / F) 24. deriving the volumetric flow rate changes estimating the time course of the volume flow Q S of slag 4 being debris.
- CPU 21 may converter the first tilting speed as explanatory variables, the first regression equation 31 an auxiliary storage device for the purpose variable volume flow Q S of slag 4 being Haikasu from the converter 1 23, and the change in the tilt angle of the converter 1 with time is substituted into the first regression equation 31 to derive the volume flow rate transition.
- step S ⁇ b> 2 the CPU 21 receives information on the weight, temperature, and composition of the slag 4 in the converter 1 input from the outside via the input / output interface (I / F) 24 and the time when the desiliconization process or the dephosphorization process is completed. Based on the information indicating the elapsed time from the time (elapsed time after processing), the bulk density transition in which the temporal change of the bulk density ⁇ S of the slag 4 discharged from the converter 1 is estimated is derived.
- step S3 the CPU 21 derives a value obtained by integrating the products at the corresponding time points of the volume density transition and the bulk density transition derived in steps S1 and S2 along the time axis as an estimated value of the slag 4 waste weight.
- Example 1 Exhaust operation was carried out in a 350-ton scale top-bottom blow converter, and the slag discharge weight was estimated.
- the converter inner diameter was about 4.6 m
- the inner diameter of the straight body of the converter was about 6.6 m
- the distance from the upper end of the straight body to the furnace mouth was about 2.7 m.
- FIG. 5 shows the result.
- FIG. 5 also shows the change over time in the tilt angle of the converter during the exhaust operation. As shown in FIG.
- the basicity of slag (CaO concentration in slag / SiO 2 concentration in slag) falls within a predetermined range according to the amount of hot metal and silicon concentration.
- the auxiliary raw material such as quicklime was put into the converter and the hot metal was dephosphorized.
- the silicon concentration in the hot metal is in the range of 0.3 to 0.7 mass%
- the basicity of the slag is in the range of 1.0 to 1.3, and normal operating conditions are included in this range.
- the weight and composition of the slag in the converter were calculated by mass balance calculation.
- the temperature of the slag was measured with a temperature measuring probe immediately after the dephosphorization treatment. Thereafter, the slag flowing down from the furnace port was collected several times during the slag drainage, the elapsed time after the treatment was changed, and the bulk density ⁇ S of the slag was measured. Based on the data of the bulk density ⁇ S obtained by this method, a regression equation was created that correlates the relationship between the slag weight, temperature and composition in the converter, the elapsed time after the treatment, and the slag bulk density ⁇ S.
- FIG. 7 shows the result.
- the estimated value of the slag evacuation weight at the time of evacuation completion almost coincided with the actual weighed value by the weigher.
- Example 2 The waste operation was carried out a plurality of times, and in each operation, the estimated value of the waste weight of the slag was derived using the method according to the embodiment of the disclosed technology. Further, in each operation, an estimated value of the slag excretion weight was derived using a method visually observed by the operator (Comparative Example 1) and a method described in Japanese Patent Application Laid-Open No. 2007-308773 (Comparative Example 2). Moreover, in each operation, the actual scale value by the weighing machine of the waste weight of slag was acquired. In estimating the slag waste weight using the method described in Japanese Patent Application Laid-Open No.
- FIG. 8 shows a graph in which the horizontal axis represents the actual value measured by a weigher, and the vertical axis represents the estimated value of the slag waste weight, using the methods according to Examples, Comparative Example 1 and Comparative Example 2. It is the figure which plotted the estimated value of the discharge weight of each derived slag.
- the straight line in the graph shown in FIG. 8 is a line where the estimated value and the actual balance value match, and the closer the plot is to this straight line, the closer the estimated value is to the actual balance value.
- the average value (average error) of the difference between the estimated weight value derived using the method according to the example of the disclosed technology and the actual balance value was 0.45 ton.
- the average value of the difference between the estimated value of the waste weight (Comparative Example 1) derived by visual observation of the operator and the actual balance value was 1.28 tons.
- the average value of the difference between the estimated weight value derived using the method described in JP-A-2007-308773 and the actual balance value was 1.59 tons. That is, it can be confirmed that the estimated value derived using the method according to the embodiment of the disclosed technique is closer to the actual measured value than the estimated value derived using the method according to Comparative Example 1 and Comparative Example 2. It was. That is, according to the method for estimating the waste weight according to the embodiment of the disclosed technique, it is possible to easily and accurately estimate the waste weight of the slag.
- Example 3 Using the same converter as in Example 1, a test for evaluating the effect of reducing the amount of auxiliary raw material used was performed. After charging scrap and hot metal into the converter, secondary materials such as quick lime are introduced into the converter so that the basicity of the slag is within the specified range according to the amount of hot metal and silicon concentration. Processed. Thereafter, the converter was tilted and a part of the upper slag was discharged from the furnace port, and then the converter was made upright again to add the auxiliary material, followed by decarburization treatment. Under the present circumstances, the waste weight of the slag was estimated by the method according to the embodiment of the disclosed technology and the conventional visual method of the operator, and the amount of the auxiliary material to be added during the decarburization process was determined.
- secondary materials such as quick lime are introduced into the converter so that the basicity of the slag is within the specified range according to the amount of hot metal and silicon concentration. Processed. Thereafter, the converter was tilted and a part of the upper slag was discharge
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Abstract
Description
(1)式において、WSは排滓開始から時間tが経過するまでのスラグ4の排滓重量(ton)、ρSは転炉1から排滓されるスラグ4の嵩密度(単位体積あたりの重量[ton/m3])、QSは転炉1から排滓されるスラグ4の体積流量(単位時間あたりの体積[m3/sec])、tはスラグ4の排滓開始時点からの経過時間(sec)を表す。
350ton規模の上底吹き転炉において排滓操業を実施し、スラグの排滓重量を推定した。転炉の炉口内径は、約4.6m、転炉の直胴部内径は約6.6m、直胴部上端から炉口までの距離は約2.7mであった。
排滓操業を複数回に亘って実施し、各操業において、開示の技術の実施例に係る方法を用いてスラグの排滓重量の推定値を導出した。更に、各操業において、オペレータの目視による方法(比較例1)、及び特開2007-308773号公報に記載の方法(比較例2)を用いてスラグの排滓重量の推定値を導出した。また、各操業において、スラグの排滓重量の秤量器による実秤値を取得した。なお、特開2007-308773号公報に記載の方法(比較例2)を用いたスラグの排滓重量の推定では、転炉の最終傾転角度から転炉内に残留するスラグの容積を推定し、転炉内に残留しているスラグの嵩密度を一定としてスラグの排滓重量を推定した。また、秤量器による実秤値については、スラグ中に不可避的に混入している粒鉄分の重量を除去する補正を行っている。補正方法としては、スラグの一部を採取し、その中に含まれている粒鉄分の比率を求め、求めた比率から、排滓したスラグに含まれる粒鉄分の重量を算出し、算出した粒鉄分の重量を実秤値から差し引いた。一方、開示の技術の実施例に係るスラグの排滓重量の推定では粒鉄分の補正は必要ない。
実施例1と同じ転炉を用いて、副原料使用量の削減効果を評価する試験を実施した。スクラップおよび溶銑を転炉内に装入した後、溶銑量および珪素濃度に応じて、スラグの塩基度が所定範囲内となるように生石灰等の副原料を転炉に投入して溶銑の脱燐処理を行った。その後、転炉を傾転して炉口から上層のスラグの一部を排滓した後、再度転炉を直立させて副原料を添加し、引き続き脱炭処理を行った。この際、開示の技術の実施例に係る方法と従来のオペレータの目視による方法でスラグの排滓重量を推定し、脱炭処理時に添加する副原料の量を決定した。
Claims (6)
- 転炉内において脱珪処理または脱燐処理を行った後に前記転炉を傾転させることにより前記転炉内に溶鉄を残したまま前記転炉からスラグを排滓する排滓操業において前記転炉から排滓されたスラグの重量を推定する排滓重量推定方法であって、
前記転炉から排滓されるスラグの体積流量の経時変化を推定した体積流量推移を導出し、
前記転炉から排滓されるスラグの嵩密度の経時変化を推定した嵩密度推移を導出し、
前記体積流量推移および前記嵩密度推移の対応する各時点におけるスラグの体積流量と嵩密度との積を積算して得られる値を、前記転炉から排滓されたスラグの排滓重量の推定値として導出する
排滓重量推定方法。 - 前記転炉からスラグを排滓するときの前記転炉の傾転角度の経時変化に基づいて前記体積流量推移を導出する
請求項1に記載の排滓重量推定方法。 - 前記転炉の傾転速度と、前記転炉から排滓されるスラグの体積流量との関係を示す第1の回帰式を導出し、
前記転炉からスラグを排滓するときの前記転炉の傾転角度の経時変化と、前記第1の回帰式とに基づいて前記体積流量推移を導出する
請求項2に記載の排滓重量推定方法。 - 前記脱珪処理または前記脱燐処理を行った後の前記転炉内のスラグの重量、温度及び組成のうちの少なくとも一つ、並びに前記脱珪処理または前記脱燐処理が完了した時点からの経過時間に基づいて前記嵩密度推移を導出する
請求項1から請求項3のいずれか1つに記載の排滓重量推定方法。 - 前記脱珪処理または前記脱燐処理を行った後の前記転炉内のスラグの重量、温度及び組成のうちの少なくとも一つ、並びに脱珪処理または脱燐処理が完了した時点からの経過時間と、前記転炉から排滓されるスラグの嵩密度との関係を示す第2の回帰式を導出し、
前記脱珪処理または前記脱燐処理を行った後の前記転炉内のスラグの重量、温度及び組成のうちの少なくとも一つ、並びに脱珪処理または脱燐処理が完了した時点からの経過時間と、前記第2の回帰式とに基づいて前記嵩密度推移を導出する
請求項4に記載の排滓重量推定方法。 - 転炉内において脱珪処理または脱燐処理を行った後に前記転炉を傾転させることにより前記転炉内に溶鉄を残したまま前記転炉からスラグを排滓する排滓操業において前記転炉から排滓されたスラグの重量を推定する排滓重量推定装置であって、
前記転炉から排滓されるスラグの体積流量の経時変化を推定した体積流量推移を導出する体積流量推移導出部と、
前記転炉から排滓されるスラグの嵩密度の経時変化を推定した嵩密度推移を導出する嵩密度推移導出部と、
前記体積流量推移および前記嵩密度推移の対応する各時点におけるスラグの体積流量と嵩密度との積を積算して得られる値を前記転炉から排滓されたスラグの排滓重量の推定値として導出する排滓重量導出部と、
を含む排滓重量推定装置。
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2018119195A (ja) * | 2017-01-27 | 2018-08-02 | Jfeスチール株式会社 | 溶融金属精錬容器からの排滓量の推定方法および溶融金属の精錬方法 |
WO2020129887A1 (ja) * | 2018-12-17 | 2020-06-25 | 日本製鉄株式会社 | 炉内残留スラグ量の推定方法および推定装置 |
WO2023074085A1 (ja) * | 2021-10-28 | 2023-05-04 | Jfeスチール株式会社 | 炉内スラグ量推定装置、炉内スラグ量推定方法及び溶鋼製造方法 |
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007077483A (ja) * | 2005-09-16 | 2007-03-29 | Nippon Steel Corp | 転炉製鋼法 |
JP2010126790A (ja) * | 2008-11-28 | 2010-06-10 | Nippon Steel Corp | 転炉の精錬方法 |
JP2016048235A (ja) * | 2014-08-27 | 2016-04-07 | Jfeスチール株式会社 | スラグ組成の分析方法及び溶融金属の精錬方法 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03158408A (ja) * | 1989-11-14 | 1991-07-08 | Kawasaki Steel Corp | 製鋼炉内残留スラグ量の推定方法 |
US6562285B1 (en) * | 2000-11-15 | 2003-05-13 | Metallurgical Sensors, Inc. | Method and apparatus for detecting slag carryover |
JP4421314B2 (ja) | 2004-01-26 | 2010-02-24 | 株式会社神戸製鋼所 | 溶銑の精錬でのスラグ量の決定方法 |
JP4790489B2 (ja) * | 2006-05-19 | 2011-10-12 | 新日本製鐵株式会社 | 転炉製鋼法 |
CN102183288B (zh) * | 2011-03-03 | 2013-01-02 | 浙江大学 | 基于远程红外监测的精炼铝用量控制方法 |
CN102643947B (zh) * | 2012-05-08 | 2013-06-26 | 首钢总公司 | 一种缩短转炉溅渣护炉时间的方法 |
CN105073305B (zh) * | 2013-04-27 | 2017-08-29 | 国立大学法人山梨大学 | 浇注控制方法以及存储有用于使计算机作为浇注控制单元发挥功能的程序的存储介质 |
CN103397134B (zh) * | 2013-07-15 | 2014-12-31 | 江苏省沙钢钢铁研究院有限公司 | 一种根据转炉倾动角度计算转炉留渣量的方法 |
CN103468859A (zh) * | 2013-09-24 | 2013-12-25 | 武汉钢铁(集团)公司 | 计算转炉留渣量确定石灰用量的方法 |
-
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Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007077483A (ja) * | 2005-09-16 | 2007-03-29 | Nippon Steel Corp | 転炉製鋼法 |
JP2010126790A (ja) * | 2008-11-28 | 2010-06-10 | Nippon Steel Corp | 転炉の精錬方法 |
JP2016048235A (ja) * | 2014-08-27 | 2016-04-07 | Jfeスチール株式会社 | スラグ組成の分析方法及び溶融金属の精錬方法 |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2018119195A (ja) * | 2017-01-27 | 2018-08-02 | Jfeスチール株式会社 | 溶融金属精錬容器からの排滓量の推定方法および溶融金属の精錬方法 |
WO2020129887A1 (ja) * | 2018-12-17 | 2020-06-25 | 日本製鉄株式会社 | 炉内残留スラグ量の推定方法および推定装置 |
JPWO2020129887A1 (ja) * | 2018-12-17 | 2021-03-18 | 日本製鉄株式会社 | 炉内残留スラグ量の推定方法および推定装置 |
KR20210091793A (ko) * | 2018-12-17 | 2021-07-22 | 닛폰세이테츠 가부시키가이샤 | 로 내 잔류 슬래그양의 추정 방법 및 추정 장치 |
CN113195746A (zh) * | 2018-12-17 | 2021-07-30 | 日本制铁株式会社 | 炉内残留熔渣量的估计方法和估计装置 |
KR102463279B1 (ko) | 2018-12-17 | 2022-11-07 | 닛폰세이테츠 가부시키가이샤 | 로 내 잔류 슬래그양의 추정 방법 및 추정 장치 |
CN113195746B (zh) * | 2018-12-17 | 2023-10-20 | 日本制铁株式会社 | 炉内残留熔渣量的估计方法和估计装置 |
WO2023074085A1 (ja) * | 2021-10-28 | 2023-05-04 | Jfeスチール株式会社 | 炉内スラグ量推定装置、炉内スラグ量推定方法及び溶鋼製造方法 |
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