TWI627284B - Molten pig iron preparation processing method and molten pig iron preparation processing control device - Google Patents

Abstract

高精度地推定脫磷處理後之熔融生鐵中之碳濃度。 The carbon concentration in the molten pig iron after the dephosphorization treatment is accurately estimated.

提供一種熔融生鐵預備處理方法，是在使用轉爐之熔融生鐵預 備處理中包含以下步驟：資料取得步驟，取得與脫磷處理前之熔融生鐵相關的熔融生鐵資料、以及包含在脫磷處理時從上述轉爐排出之排氣成分及排氣流量的排氣資料；碳濃度推定步驟，將基於上述排氣資料而算出之脫磷處理時之脫碳量，使用基於上述脫磷處理時之作業因素而算出之補正值來予以補正，並基於經過補正之脫碳量與上述熔融生鐵資料而推定脫磷處理後之碳濃度。 A method for preparing molten pig iron is provided. The preparation process includes the following steps: a data obtaining step, obtaining molten pig iron data related to the molten pig iron before dephosphorization treatment, and exhaust data including an exhaust gas component and an exhaust flow rate discharged from the converter during the dephosphorization treatment; In the carbon concentration estimation step, the decarburization amount calculated during the dephosphorization process based on the exhaust gas data is corrected using a correction value calculated based on the operational factors during the dephosphorization process, and based on the corrected decarburization amount. The carbon concentration after dephosphorization is estimated from the above molten pig iron data.

Description

熔融生鐵預備處理方法及熔融生鐵預備處理控制裝置 Molten pig iron preparation processing method and molten pig iron preparation processing control device

本發明是涉及在使用轉爐之熔融生鐵預備處理對脫磷處理後之熔融生鐵中之碳濃度進行推定之熔融生鐵預備處理方法及熔融生鐵預備處理控制裝置。 The present invention relates to a molten pig iron preliminary treatment method and a molten pig iron preliminary treatment control device for estimating a carbon concentration in a molten pig iron after dephosphorization treatment by using a molten pig iron preliminary treatment of a converter.

關於製鋼程序中之轉爐吹煉，為了令停吹時(脫碳處理結束時)之熔鋼成分濃度(例如碳濃度等)、熔鋼溫度命中目標值，將靜態控制與根據副槍測量之動態控制組合而進行吹煉控制。靜態控制是在吹煉開始之前，基於熔融生鐵中之成分濃度等之熔融生鐵資料，使用根據質量平衡、熱平衡而來之數學模型等，決定為了令停吹時之熔鋼成分濃度及熔鋼溫度命中目標值而必要之氧吹入量、各種副原料之投入量，依循此而進行吹煉。另一方面，動態控制是在吹煉中使用副槍而實際測量熔鋼成分濃度、熔鋼溫度，基於該等測量值，使用根據質量平衡、熱平衡而來之數學模型等，對在靜態控制決定之氧吹入量、各種副原料之投入量進行更新，使用更新後之該等值而進行吹煉。 Regarding the converter blowing in the steel making process, in order to make the molten steel component concentration (such as carbon concentration) and molten steel temperature hit the target value when the blowing is stopped (at the end of the decarburization treatment), the static control and the dynamics measured by the sub gun are used. The combination is controlled to perform the blowing control. The static control is based on the molten pig iron data such as the concentration of the constituents in the molten pig iron before the start of the blowing process, using mathematical models based on mass balance and thermal balance to determine the concentration of molten steel components and the temperature of the molten steel when the blowing is stopped. The amount of oxygen required to hit the target value and the amount of input of various auxiliary materials are blown in accordance with this. On the other hand, dynamic control is the actual measurement of the molten steel component concentration and molten steel temperature by using a sub gun in the blowing process. Based on these measured values, a mathematical model based on mass balance and thermal balance is used to determine the static control. The oxygen blowing amount and the input amounts of various auxiliary materials are updated, and the updated values are used to perform the blowing.

近年來，關於轉爐吹煉，有被稱作MURC(Multi Refining Converter：多功能轉爐法)之技術正在開發進展，可將熔融生鐵預備處理與脫碳處理在同 一轉爐一連串地進行。MURC可將身為吹煉中之熔融生鐵預備處理之其中一者之脫磷處理與吹煉中之脫碳處理連續地進行。藉此，起因於在製鋼程序中將熔融生鐵送到其他轉爐之熱損失會減少。所以，可將大量廢料使用在吹煉，令製鋼程序之生產效率顯著提昇將成為可能。 In recent years, with regard to converter blowing, a technology called MURC (Multi Refining Converter) is being developed, which can be used to prepare molten pig iron and decarburize it simultaneously. A series of converters proceed. MURC can continuously perform dephosphorization treatment, which is one of the molten pig iron preliminary treatments in the blowing process, and decarburization treatment in the blowing process. As a result, the heat loss caused by sending molten pig iron to other converters during the steelmaking process is reduced. Therefore, a large amount of waste material can be used in the smelting, which will make it possible to significantly improve the production efficiency of the steelmaking process.

於轉爐裝入大量廢料的情況下，當脫磷處理結束後，可能發生在熔融生鐵存在有未熔解廢料之情形。若如此地存在有未熔解廢料，則要針對轉爐內之熔融生鐵進行上述之副槍測量會變得困難。這是因為，可能由於副槍對未熔解廢料衝突而造成副槍破損，引起重大事故。因此，當在脫磷結束後而要開始脫碳處理時，難以使用副槍來測量脫碳處理開始時之熔融生鐵中之碳濃度。所以，要藉由同一轉爐來將脫磷處理、脫碳處理連續進行的情況下，將不是基於脫碳處理開始時之熔融生鐵中之碳濃度之實際值，而是基於脫磷處理開始時之熔融生鐵中之碳濃度之實際值，藉由靜態控制來決定吹入之氧量、各種副原料之投入量。 In the case where a large amount of waste is loaded into the converter, after the dephosphorization treatment is completed, it may happen that there is unmelted waste in the molten pig iron. If there is unmelted waste material in this way, it will be difficult to perform the above-mentioned sub-gun measurement on the molten pig iron in the converter. This is because the secondary gun may be damaged due to the conflict between the secondary gun and the unmelted waste material, which may cause a serious accident. Therefore, when the decarburization process is to be started after the dephosphorization is completed, it is difficult to use a sub-gun to measure the carbon concentration in the molten pig iron at the start of the decarburization process. Therefore, when the dephosphorization treatment and decarburization treatment are performed continuously by the same converter, the actual value of the carbon concentration in the molten pig iron at the beginning of the decarburization treatment will not be based on the actual value of the carbon concentration in the molten pig iron at the beginning of the decarburization treatment. The actual value of the carbon concentration in the molten pig iron is determined by the static control of the amount of oxygen to be blown and the amount of various auxiliary materials to be input.

然而，熔融生鐵中之碳濃度可能因為脫磷處理之進行狀況而比原先設想的還要大幅地減少，或是不太減少。此情況下，脫碳處理後之熔鋼中之碳濃度可能大幅地偏離目標之碳濃度。所以，為了確實地獲得具有目標之碳濃度之熔鋼，需要基於脫磷處理後之熔融生鐵中之碳濃度來進行靜態控制，而非基於脫磷處理前之熔融生鐵中之碳濃度來進行靜態控制。由於直接測量脫磷處理後之熔融 生鐵中之碳濃度會有困難，故需要可合理地推定脫磷處理後之熔融生鐵中之碳濃度之技術。 However, due to the progress of dephosphorization, the carbon concentration in the molten pig iron may be reduced significantly or less. In this case, the carbon concentration in the molten steel after the decarburization treatment may greatly deviate from the target carbon concentration. Therefore, in order to reliably obtain a molten steel with a target carbon concentration, it is necessary to perform static control based on the carbon concentration in the molten pig iron after dephosphorization treatment, rather than static based on the carbon concentration in the molten pig iron before dephosphorization treatment. control. Due to direct measurement of melting after dephosphorization The carbon concentration in pig iron can be difficult, so a technology that can reasonably estimate the carbon concentration in molten pig iron after dephosphorization is needed.

關於推定轉爐吹煉之碳濃度之技術，已經有各式各樣之技術在進行開發。舉例來說，在下述專利文獻1已揭示到如下技術：使用在脫碳處理中從轉爐排出之排氣資料來算出與脫碳氧效率相關之參數，使用該參數來推定正在進行脫碳處理之熔鋼中之碳濃度。該技術使用之模型是將脫碳處理中之以下舉動予以組合：當吹入之氧與熔鋼中之碳以幾乎1對1之比例(在此，1對1之比例是指莫耳比之1對1)來反應之脫碳最旺盛期之階段下，脫碳氧效率成為一定；當熔鋼中之碳濃度低於臨界值之階段下，脫碳氧效率降低。藉此，將脫碳處理之推移反映之碳濃度推定成為可能，故熔鋼中之碳濃度及熔鋼溫度之推定精度獲得提昇。 A variety of technologies have been developed for estimating the carbon concentration of converter blowing. For example, the following patent document 1 has disclosed a technology that uses the exhaust gas data discharged from the converter during the decarburization process to calculate a parameter related to the decarburization oxygen efficiency, and uses this parameter to estimate that the decarburization process is being performed. Carbon concentration in molten steel. The model used in this technology is to combine the following actions in the decarburization process: when the blowing oxygen and the carbon in the molten steel are in a ratio of almost one to one (here, the ratio of one to one refers to the molar ratio 1 to 1) The decarburization oxygen efficiency becomes constant during the most vigorous decarburization phase of the reaction; when the carbon concentration in the molten steel is lower than the critical value, the decarburization oxygen efficiency decreases. As a result, it is possible to estimate the carbon concentration reflected by the decarburization process, so the estimation accuracy of the carbon concentration in the molten steel and the temperature of the molten steel is improved.

先行技術文獻 Advance technical literature

專利文獻 Patent literature

專利文獻1：日本特開2012-117090號公報 Patent Document 1: Japanese Patent Application Publication No. 2012-117090

發明概要 Summary of invention

然而，藉由上述專利文獻1記載之技術而推定之熔鋼中之碳濃度僅僅是針對脫碳處理下之熔融生鐵中之碳濃度進行推定。在脫磷處理吹入轉爐內之氧流量是不同於脫碳處理。具體而言，在脫碳處理是為了熔鋼之脫碳，而令氧從 上吹槍高速地吹入，在脫磷處理則是為了效率佳地生成用於促進脫磷之氧化鐵熔渣，而令氧以低速吹入。若吹入轉爐內之氧流量不同，則在轉爐內發生之氧化反應之機制亦不同。所以，即便將上述專利文獻1所揭示之與碳濃度推定相關之技術直接用在脫磷處理下之熔融生鐵中之碳濃度推定，亦難以高精度地推定脫磷處理後之熔融生鐵中之碳濃度。 However, the carbon concentration in the molten steel estimated by the technique described in the aforementioned Patent Document 1 is only estimated for the carbon concentration in the molten pig iron under the decarburization treatment. The oxygen flow rate into the converter during dephosphorization is different from decarburization. Specifically, the decarburization treatment is for the decarburization of molten steel, The upper blowing gun blows in at a high speed. In the dephosphorization process, the iron oxide slag used to promote dephosphorization is efficiently generated, and oxygen is blown in at a low speed. If the oxygen flow rate into the converter is different, the mechanism of the oxidation reaction occurring in the converter is also different. Therefore, it is difficult to estimate the carbon in the molten pig iron after dephosphorization with high accuracy even if the technology related to the estimation of carbon concentration disclosed in the above Patent Document 1 is directly used to estimate the carbon concentration in the molten pig iron under dephosphorization. concentration.

於是，本發明是鑑於上述問題而建構，本發明之目的是提供可高精度地推定脫磷處理後之熔融生鐵中之碳濃度之新穎且經過改良之熔融生鐵預備處理方法及熔融生鐵預備處理控制裝置。 Therefore, the present invention is constructed in view of the above-mentioned problems, and an object of the present invention is to provide a novel and improved molten pig iron pretreatment method and a molten pig iron pretreatment control method that can accurately estimate the carbon concentration in molten pig iron after dephosphorization treatment. Device.

為了解決上述課題，根據本發明之某觀點，提供一種熔融生鐵預備處理方法，是在使用轉爐之熔融生鐵預備處理中包含以下步驟：資料取得步驟，取得與脫磷處理前之熔融生鐵相關的熔融生鐵資料、以及包含在脫磷處理時從上述轉爐排出之排氣成分及排氣流量的排氣資料；碳濃度推定步驟，將基於上述排氣資料而算出之脫磷處理時之脫碳量，使用基於上述脫磷處理時之作業因素而算出之補正值來予以補正，並基於經過補正之脫碳量與上述熔融生鐵資料而推定脫磷處理後之碳濃度。 In order to solve the above-mentioned problems, according to a certain aspect of the present invention, a method for preparing molten pig iron is provided. The method includes the following steps in a molten pig iron preparation process using a converter: a data acquisition step to obtain a melt related to molten pig iron before dephosphorization treatment. Pig iron data and exhaust gas data including exhaust gas components and exhaust gas flows discharged from the converter during the dephosphorization process; the carbon concentration estimation step will calculate the decarburization amount during the dephosphorization process based on the exhaust gas data, The correction value calculated based on the operation factors during the dephosphorization treatment is used for correction, and the carbon concentration after dephosphorization treatment is estimated based on the corrected decarburization amount and the molten pig iron data.

亦可以如下：在上述碳濃度推定步驟，上述補正值是藉由以上述作業因素作為解釋變數之迴歸式而算出。 It may also be as follows: In the step of estimating the carbon concentration, the correction value is calculated by a regression formula using the operation factor as an explanatory variable.

亦可以如下：上述脫磷處理時之作業因素是包含顯示上述脫磷處理時之熔渣之渣化狀況之作業因素。 It may also be as follows: the operational factors during the above-mentioned dephosphorization treatment include operational factors that show the slagging status of the slag during the aforementioned dephosphorization treatment.

亦可以如下：上述顯示熔渣之渣化狀況之作業因素是包含與上述轉爐內之聲響資訊相關之作業因素。 It can also be as follows: The above-mentioned operational factors showing the slag slagging status include operational factors related to the above-mentioned sound information in the converter.

亦可以如下：在上述資料取得步驟更取得上述脫磷處理後之目標碳濃度、及在上述脫磷處理後進行之脫碳處理之往上述轉爐內之氧吹入量；上述熔融生鐵預備處理方法更包含：氧量修正步驟，基於推定之上述脫磷處理後之碳濃度及上述脫磷處理後之上述目標碳濃度的比較結果，將上述氧吹入量修正。 It may also be as follows: the target carbon concentration after the dephosphorization treatment and the oxygen blowing amount into the converter in the decarburization treatment performed after the dephosphorization treatment are further obtained in the above-mentioned data obtaining step; the above-mentioned molten pig iron preliminary treatment method The method further includes an oxygen amount correction step of correcting the oxygen blowing amount based on a comparison result between the estimated carbon concentration after the dephosphorization treatment and the target carbon concentration after the dephosphorization treatment.

另外，為了解決上述課題，根據本發明之別的觀點，提供一種熔融生鐵預備處理控制裝置，是控制使用轉爐之熔融生鐵預備處理的熔融生鐵預備處理控制裝置，具有：資料取得部，取得與脫磷處理前之熔融生鐵相關的熔融生鐵資料、以及包含在脫磷處理時從上述轉爐排出之排氣成分及排氣流量的排氣資料；碳濃度推定部，將基於上述排氣資料而算出之脫磷處理時之脫碳量，使用基於上述脫磷處理時之作業因素而算出之補正值來予以補正，並基於經過補正之脫碳量與上述熔融生鐵資料而推定脫磷處理後之碳濃度。 In addition, in order to solve the above-mentioned problems, according to another aspect of the present invention, a molten pig iron preliminary processing control device is provided. The molten pig iron preliminary processing control device controls a molten pig iron preliminary processing using a converter. The molten pig iron data related to the molten pig iron before the phosphorus treatment, and the exhaust gas data including the exhaust gas components and the exhaust gas flow rate discharged from the converter during the dephosphorization process; the carbon concentration estimation unit will calculate the exhaust gas data based on the exhaust gas data. The decarburization amount during the dephosphorization process is corrected using a correction value calculated based on the operating factors during the dephosphorization process, and the carbon concentration after the dephosphorization process is estimated based on the corrected decarburization amount and the molten pig iron data. .

上述熔融生鐵預備處理方法是使用補正脫碳量來推定脫磷處理後之熔融生鐵中之碳濃度，前述補正脫碳量是將使用排氣資料所獲得之脫碳量藉由補正值而予以補正，前述補正值是藉由以脫磷處理時之作業因素作為 解釋變數之迴歸式而表現。藉此，即便未在脫磷處理後進行副槍測量，亦可高精度地推定脫磷處理後之熔融生鐵中之碳濃度。所以，可更確實地獲得在脫碳處理後具有目標值碳濃度之熔鋼。 The above-mentioned preparation method of molten pig iron is to estimate the carbon concentration in the molten pig iron after dephosphorization treatment by using a corrected decarburization amount. The aforementioned correction value is based on the operating factors during dephosphorization. Explain the regression expression of the variables. Thereby, even if the sub-gun measurement is not performed after the dephosphorization treatment, the carbon concentration in the molten pig iron after the dephosphorization treatment can be estimated with high accuracy. Therefore, a molten steel having a target carbon concentration after the decarburization treatment can be obtained more reliably.

如以上說明，根據本發明，可高精度地推定脫磷處理後之熔融生鐵中之碳濃度。 As described above, according to the present invention, the carbon concentration in the molten pig iron after the dephosphorization treatment can be estimated with high accuracy.

1‧‧‧熔融生鐵預備處理系統 1‧‧‧ molten pig iron pre-treatment system

1a‧‧‧孔部 1a‧‧‧hole

10‧‧‧轉爐吹煉設備 10‧‧‧Converter blowing equipment

11‧‧‧轉爐 11‧‧‧ converter

12‧‧‧煙道 12‧‧‧ flue

13‧‧‧上吹槍 13‧‧‧up blowing gun

14‧‧‧氧 14‧‧‧ oxygen

15‧‧‧底吹氣體 15‧‧‧ bottom blown gas

20‧‧‧熔融生鐵預備處理控制裝置 20‧‧‧ Molten pig iron preparation processing control device

21‧‧‧熔融生鐵預備處理資料庫 21‧‧‧ molten pig iron preparation database

22‧‧‧輸入輸出部 22‧‧‧I / O Department

30‧‧‧測量控制裝置 30‧‧‧Measurement control device

101‧‧‧排氣成分分析計 101‧‧‧Exhaust gas composition analyzer

102‧‧‧排氣流量計 102‧‧‧Exhaust flowmeter

111‧‧‧聲級計 111‧‧‧ Sound Level Meter

112‧‧‧集音麥克風 112‧‧‧Collection microphone

201‧‧‧資料取得部 201‧‧‧Data Acquisition Department

202‧‧‧碳濃度推定部 202‧‧‧Carbon concentration estimation unit

203‧‧‧修正量算出部 203‧‧‧ Correction calculation unit

211‧‧‧熔融生鐵資料 211‧‧‧ molten pig iron information

212‧‧‧參數 212‧‧‧parameters

213‧‧‧目標資料 213‧‧‧Target information

S101、S103、S105‧‧‧步驟 S101, S103, S105‧‧‧ steps

圖1...顯示與本發明之一實施形態相關之熔融生鐵預備處理系統之構成例的圖。 FIG. 1 is a diagram showing a configuration example of a molten pig iron preliminary processing system according to an embodiment of the present invention.

圖2...顯示與同一實施形態相關之熔融生鐵預備處理系統之熔融生鐵預備處理方法之流程圖的圖。 Fig. 2 is a view showing a flowchart of a molten pig iron preparation processing method of a molten pig iron preparation processing system according to the same embodiment.

圖3...顯示比較例之基於排氣資料之脫碳量△C_offgas之推定誤差的圖。 Fig. 3 shows _graphs of estimated errors of decarburization amount ΔC _offgas based on exhaust gas data of a comparative example.

圖4...顯示實施例1之基於排氣資料之脫碳量△C_offgas+補正項△C_correct之推定誤差的圖。 Fig. 4 shows _graphs of estimated errors of the decarburization amount ΔC _offgas + correction term ΔC _correct based on the exhaust gas data of Example 1.

圖5...顯示實施例2之基於排氣資料之脫碳量△C_offgas+補正項△C_correct之推定誤差的圖。 FIG. 5... Shows the estimated error of the decarburization amount ΔC _offgas + correction term ΔC _correct based on the exhaust gas data of Example 2. FIG.

圖6...顯示實施例1之碳濃度C_deP之推定誤差的圖。 Fig. 6 shows _graphs of estimated errors of carbon concentration C _deP in Example 1.

圖7...顯示實施例2之碳濃度C_deP之推定誤差的圖。 7 is a graph showing estimated errors of the carbon concentration C _deP in Example 2. FIG.

用以實施發明之形態 Forms used to implement the invention

以下，一面參考附加圖面，一面詳細說明本發明之較佳實施形態。附帶一提，在本說明書及圖面，實質上具有 相同機能構成之構成要素是加上相同之符號，藉此省略重複說明。 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Incidentally, in this description and the drawings, Components having the same functional configuration are denoted by the same reference numerals, and redundant descriptions are omitted.

附帶一提，在脫碳處理時之轉爐內，因應其碳濃度而存在生鐵或鋼，但為了避免說明變得煩雜，以下說明是將轉爐內之熔融生鐵或熔鋼皆稱作熔鋼。另外，在脫磷處理時是使用熔融生鐵這樣之字詞。另外，在本說明書，只要沒有特別區分，則「脫磷處理後」是指「脫磷處理結束之時間點(脫磷處理結束時)」。亦即，「脫磷處理後」並不包含脫碳處理開始以後之時間點。 Incidentally, pig iron or steel exists in the converter during the decarburization process due to its carbon concentration, but in order to avoid confusing the description, the following description refers to the molten pig iron or molten steel in the converter as molten steel. In the dephosphorization treatment, a term such as molten pig iron is used. In addition, in this specification, as long as there is no special distinction, "after the dephosphorization treatment" means "the time point when the dephosphorization treatment is completed (at the end of the dephosphorization treatment)". That is, "after the dephosphorization treatment" does not include the time point after the start of the decarburization treatment.

另外，雖然與本發明之一實施形態相關之熔融生鐵預備處理方法所設想的是對MURC之脫磷處理後之熔融生鐵中之碳濃度進行推定，但本發明並非限定於該例。舉例來說，與本發明之一實施形態相關之熔融生鐵預備處理方法亦可以對使用SRP(Simple Refining Process：簡單精煉程序)等其他之轉爐吹煉方式之脫磷處理後之熔融生鐵中之碳濃度進行推定。亦即，與本發明之一實施形態相關之熔融生鐵預備處理方法並不管在熔融生鐵預備處理(尤其脫磷處理)所使用之轉爐吹煉方式，而可推定脫磷處理後之熔融生鐵中之碳濃度。 In addition, although the molten pig iron preliminary processing method related to one embodiment of the present invention contemplates estimating the carbon concentration in the molten pig iron after the dephosphorization treatment of MURC, the present invention is not limited to this example. For example, the molten pig iron pre-treatment method related to one embodiment of the present invention can also be applied to carbon in molten pig iron after dephosphorization treatment using other converter blowing methods such as SRP (Simple Refining Process). The concentration is estimated. That is, the molten pig iron preparation processing method related to one embodiment of the present invention does not matter the converter blowing method used in the molten pig iron preparation treatment (especially the dephosphorization treatment), but it can be estimated that Carbon concentration.

<1.系統之構成> <1. System configuration>

圖1是顯示與本發明之一實施形態相關之熔融生鐵預備處理系統1之構成例的圖。參考圖1，與本實施形態相關之熔融生鐵預備處理系統1具有轉爐吹煉設備10、熔融生鐵預備處理控制裝置20及測量控制裝置30。 FIG. 1 is a diagram showing a configuration example of a molten pig iron preliminary processing system 1 according to an embodiment of the present invention. Referring to FIG. 1, a molten pig iron preliminary processing system 1 according to this embodiment includes a converter blowing device 10, a molten pig iron preliminary processing control device 20, and a measurement control device 30.

(轉爐吹煉設備) (Converter blowing equipment)

轉爐吹煉設備10具有轉爐11、煙道12、上吹槍13、排氣成分分析計101及排氣流量計102。另外，轉爐吹煉設備10可更具有聲級計111及集音麥克風112。轉爐吹煉設備10舉例來說是基於測量控制裝置30輸出之控制訊號，而開始及停止由上吹槍13進行之對熔融生鐵之氧供給、將冷材投入、以及進行與轉爐11之熔融生鐵及熔渣之排渣相關之處理。附帶一提，雖然圖示是予以省略，但轉爐吹煉設備10可設有用於測量熔融生鐵之成分濃度及熔融生鐵溫度之副槍、用於對上吹槍13供給氧之送氧裝置、具有用於對轉爐11投入冷材之驅動系統之冷材投入裝置、以及具有用於對轉爐11投入副原料之驅動系統之副原料投入裝置等一般之轉爐吹煉所使用之各種裝置。 The converter blowing equipment 10 includes a converter 11, a flue 12, an upper blowing gun 13, an exhaust gas composition analyzer 101, and an exhaust gas flow meter 102. In addition, the converter blowing device 10 may further include a sound level meter 111 and a sound collecting microphone 112. The converter blowing device 10 is based on, for example, a control signal output from the measurement control device 30, and starts and stops oxygen supply to the molten pig iron by the upper blowing gun 13, inputs cold materials, and performs molten pig iron with the converter 11. And slag discharge related treatment. Incidentally, although the illustration is omitted, the converter blowing equipment 10 may be provided with a sub gun for measuring the concentration of molten pig iron and the temperature of the molten pig iron, an oxygen supply device for supplying oxygen to the upper blowing gun 13, Various devices used in general converter smelting such as a cold material input device for driving a cold material into the converter 11 and a secondary material input device having a driving system for inputting a secondary material into the converter 11.

用於吹煉之上吹槍13是從轉爐11之爐口***，從送氧裝置送來之氧14是通過上吹槍13而供給至爐內之熔融生鐵。另外，可為了攪拌熔融生鐵，將氮氣、氬氣等之惰性氣體等當作底吹氣體15而從轉爐11之底部導入。於轉爐11內，裝入/投入從高爐流出之熔融生鐵、少量之鐵廢料、用於調整熔融生鐵溫度之冷材、生石灰等之用於形成熔渣之副原料。附帶一提，若副原料是粉體，則亦可通過上吹槍13而將其與氧14一起供給至轉爐11內。 The upper blowing gun 13 used for smelting is inserted from the furnace mouth of the converter 11, and the oxygen 14 sent from the oxygen feeding device is the molten pig iron supplied into the furnace through the upper blowing gun 13. In addition, in order to stir the molten pig iron, an inert gas such as nitrogen, argon, or the like may be introduced from the bottom of the converter 11 as the bottom blowing gas 15. In the converter 11, molten pig iron flowing out of the blast furnace, a small amount of iron waste, cold materials for adjusting the temperature of the molten pig iron, quicklime, and other auxiliary materials for forming slag are charged / input. Incidentally, if the auxiliary raw material is a powder, it can also be supplied into the converter 11 together with the oxygen 14 by the upper blowing gun 13.

在脫磷處理，如下述式(1)所示，熔融生鐵含有之磷會與轉爐內之熔渣含有之氧化鐵、及包含有含氧化鈣物質之副原料進行化學反應(脫磷反應)，藉此，令磷被 熔渣帶走。亦即，可利用吹煉令熔渣之氧化鐵之濃度增加，藉此促進脫磷反應。附帶一提，在下述式(1)，「[物質X]」是是表示熔融生鐵中之物質X，「(物質Y)」是表示熔渣中之物質Y。 In the dephosphorization treatment, as shown in the following formula (1), the phosphorus contained in the molten pig iron undergoes a chemical reaction (dephosphorization reaction) with the iron oxide contained in the slag in the converter and the auxiliary raw materials containing the calcium oxide-containing substance, With this, the phosphorus is The slag is taken away. That is, the concentration of iron oxide in the slag can be increased by blowing to promote the dephosphorization reaction. Incidentally, in the following formula (1), "[substance X]" means substance X in molten pig iron, and "(substance Y)" means substance Y in slag.

[式1]3(CaO)+5(FeO)+2[P]=(3CaO．P₂O₅)+5[Fe]‧‧‧(1) [Formula 1] 3 (CaO) +5 (FeO) +2 [P] = (3CaO.P ₂ O ₅ ) +5 [Fe] ‧‧‧ (1)

另外，熔融生鐵中之碳是與從上吹槍13供給之氧進行氧化反應(脫碳反應)。藉此，生成CO或CO₂之排氣。該等排氣是從轉爐11往煙道12排出。 The carbon in the molten pig iron undergoes an oxidation reaction (decarbonization reaction) with oxygen supplied from the upper blowing gun 13. Thereby, exhaust gas of CO or CO ₂ is generated. The exhaust gas is discharged from the converter 11 to the flue 12.

如此，在轉爐吹煉，吹入之氧與熔融生鐵中之碳、磷、或矽等反應，產生氧化物。在此產生之氧化物是作為排氣而排出，或是作為熔渣而穩定化。利用吹煉之氧化反應，令碳被去除，且令磷等被熔渣帶走而去除，藉此，生成低碳且不純物少之鋼。 In this way, blowing in a converter, the blown oxygen reacts with carbon, phosphorus, or silicon in the molten pig iron to produce oxides. The oxides generated here are discharged as exhaust gas or stabilized as slag. By the oxidation reaction of blowing, carbon is removed, and phosphorus and the like are taken away and removed by the slag, thereby producing a steel with low carbon and few impurities.

另外，除了上吹槍13之外，還可將未圖示之副槍從轉爐11之爐口***爐內。在預定之時間點令副槍之前端浸漬於熔鋼(或熔融生鐵)，藉此包含碳濃度之熔鋼中之成分濃度、及熔鋼溫度等。將藉由該副槍測量成分濃度及/或熔鋼溫度等之行為稱作副槍測量。副槍測量之結果是透過測量控制裝置30而朝熔融生鐵預備處理控制裝置20發送。附帶一提，雖然本實施形態在脫磷處理是因為轉爐11內可能有未熔解廢料存在而未進行副槍測量，但可以在脫碳處理中之預定之時間點實施副槍測量。 In addition to the blow gun 13, a sub gun (not shown) can be inserted into the furnace from the furnace port of the converter 11. The front end of the sub gun is immersed in molten steel (or molten pig iron) at a predetermined time point, thereby including the component concentration in the molten steel containing the carbon concentration, the molten steel temperature, and the like. The measurement of the component concentration and / or the temperature of the molten steel by the sub-gun is called sub-gun measurement. The measurement result of the sub gun is transmitted to the molten pig iron preliminary processing control device 20 through the measurement control device 30. Incidentally, although the sub-gun measurement is not performed in the dephosphorization treatment in this embodiment because the unmelted waste may exist in the converter 11, the sub-gun measurement may be performed at a predetermined time point in the decarburization treatment.

因為吹煉而發生之排氣是往設在轉爐11外之煙道12流動。在煙道12設有排氣成分分析計101、及排氣流量計102。排氣成分分析計101是對排氣含有之成分進行分析。排氣成分分析計101舉例來說是分析排氣含有之CO及CO₂之濃度。排氣流量計102是測量排氣之流量。排氣成分分析計101及排氣流量計102是以預定之取樣周期(例如5~10(sec)周期)而依序進行排氣之分析及測量。藉由排氣成分分析計101而分析出之與排氣成分相關之資料、及藉由排氣流量計102而測量到之與排氣流量相關之資料(以下，將該等資料稱作「排氣資料」)是透過測量控制裝置30而朝熔融生鐵預備處理控制裝置20輸出作為時間序列資料。該排氣資料可以是依序朝熔融生鐵預備處理控制裝置20輸出，亦可以是在脫磷處理結束時總括地朝熔融生鐵預備處理控制裝置20輸出。 The exhaust gas generated by the blowing process flows to the flue 12 provided outside the converter 11. An exhaust gas composition analyzer 101 and an exhaust gas flow meter 102 are provided in the flue 12. The exhaust gas component analyzer 101 analyzes components contained in the exhaust gas. The exhaust gas composition analyzer 101 analyzes, for example, the concentrations of CO and CO ₂ contained in the exhaust gas. The exhaust gas flow meter 102 measures the flow rate of the exhaust gas. The exhaust gas composition analyzer 101 and the exhaust gas flow meter 102 sequentially analyze and measure exhaust gas at a predetermined sampling period (for example, a period of 5 to 10 (sec)). The data related to the exhaust gas components analyzed by the exhaust gas component analyzer 101 and the data related to the exhaust gas flow volume measured by the exhaust gas flow meter 102 (hereinafter, these data are referred to as " Gas data ") is output as time-series data to the molten pig iron preliminary processing control device 20 through the measurement control device 30. The exhaust gas data may be sequentially output to the molten pig iron preliminary processing control device 20, or may be collectively output to the molten pig iron preliminary processing control device 20 at the end of the dephosphorization process.

另外，轉爐吹煉設備10可具有聲級計111及集音麥克風112。集音麥克風112是取得從轉爐11內發生之聲音，將與該聲音相關之訊號朝聲級計111輸出。聲級計111是針對取得之訊號而進行訊號處理，生成聲響資訊來作為處理結果。在此生成之聲響資訊是透過測量控制裝置30而朝熔融生鐵預備處理控制裝置20輸出。該聲響資訊是將脫磷處理時之轉爐11內之熔渣之渣化狀況反映之資訊，可當作脫磷處理時之作業因素之參數來使用。附帶一提，脫磷處理時之作業因素之詳細是後述。 In addition, the converter blowing device 10 may include a sound level meter 111 and a sound collecting microphone 112. The sound collecting microphone 112 obtains a sound generated from the converter 11 and outputs a signal related to the sound to the sound level meter 111. The sound level meter 111 performs signal processing on the acquired signal, and generates sound information as a processing result. The sound information generated here is output to the molten pig iron preparation processing control device 20 through the measurement control device 30. The acoustic information is information reflecting the slagging status of the slag in the converter 11 during the dephosphorization treatment, and can be used as a parameter of operating factors during the dephosphorization treatment. Incidentally, the details of the operating factors during dephosphorization are described later.

附帶一提，可以在轉爐吹煉設備10設置聲級 計111及集音麥克風112以外之顯示脫磷處理時之轉爐11內之熔渣之渣化狀況以取得作業因素之參數之裝置。舉例來說，可在轉爐11內照射微波而測量轉爐11之熔渣等級，藉此把握熔渣之渣化狀況。要取得該熔渣等級來作為作業因素之參數的情況下，舉例來說，可在轉爐吹煉設備10設置用於朝轉爐11內照射微波之微波照射裝置、用於接收在熱池面反射之微波之天線、及基於該天線所接收之微波而解析熔渣等級之熔渣等級測量裝置。 Incidentally, the sound level can be set in the converter blowing equipment 10 A device that displays the slag slagging condition in the converter 11 during dephosphorization treatment other than 111 and the sound collecting microphone 112 to obtain parameters of operation factors. For example, the slag level of the converter 11 can be measured by irradiating microwaves in the converter 11 to grasp the slag slagging status. In the case of obtaining the slag level as a parameter of the operation factor, for example, a microwave irradiating device for radiating microwaves into the converter 11 may be provided in the converter blowing device 10, and may be used for receiving reflections on the surface of the hot pool Microwave antenna and slag level measuring device for analyzing slag level based on microwave received by the antenna.

(熔融生鐵預備處理控制裝置) (Molten pig iron preparation processing control device)

熔融生鐵預備處理控制裝置20具有資料取得部201、碳濃度推定部202、修正量算出部203、熔融生鐵預備處理資料庫21、及輸入輸出部22。熔融生鐵預備處理控制裝置20是具有CPU(Central Processing Unit)、ROM(Read Only Memory)、RAM(Random Access Memory)、儲存器及通訊裝置等之硬體構成，藉由該等硬體構成而實現資料取得部201、碳濃度推定部202、修正量算出部203、及熔融生鐵預備處理資料庫21之各機能。另外，輸入輸出部22是藉由鍵盤、滑鼠、或觸控面板等之輸入裝置、顯示器或印表機等之輸出裝置、及通訊裝置而實現。 The molten pig iron preliminary processing control device 20 includes a data acquisition unit 201, a carbon concentration estimation unit 202, a correction amount calculation unit 203, a molten pig iron preliminary processing database 21, and an input / output unit 22. The molten pig iron preliminary processing control device 20 has a hardware configuration including a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), a memory, a communication device, and the like, and is realized by the hardware configuration Each function of the data acquisition unit 201, the carbon concentration estimation unit 202, the correction amount calculation unit 203, and the molten pig iron preliminary processing database 21 is performed. The input / output unit 22 is implemented by an input device such as a keyboard, a mouse, or a touch panel, an output device such as a display or a printer, and a communication device.

附帶一提，圖1是僅以熔融生鐵預備處理控制裝置20所具有之機能中之就本發明而言有特徴之機能為主，而予以圖示。除了圖示之機能之外，熔融生鐵預備處理控制裝置20還具有進行與熔融生鐵預備處理相關之控制時所必要之一般機能。 Incidentally, FIG. 1 shows only the functions which are special to the present invention among the functions of the molten pig iron preliminary processing control device 20 and are shown in the drawing. In addition to the functions shown, the molten pig iron preliminary processing control device 20 also has general functions necessary for performing control related to molten pig iron preliminary processing.

舉例來說，熔融生鐵預備處理控制裝置20具有控制將氧吹入轉爐11、將冷材及副原料投入等之與熔融生鐵預備處理相關之程序整體之機能。另外，舉例來說，熔融生鐵預備處理控制裝置20具有在一般之靜態控制進行之、在吹煉開始前使用預定之數學模型等而決定往轉爐11之氧吹入量、冷材之投入量(以後，稱作冷材量)及副原料之投入量等之機能等。另外，舉例來說，熔融生鐵預備處理控制裝置20具有針對在一般之動態控制進行之副槍測量而控制其測量對象、測量時間點等之機能。 For example, the molten pig iron preliminary processing control device 20 has a function of controlling the entire process related to the molten pig iron preliminary processing such as blowing oxygen into the converter 11 and inputting cold materials and auxiliary materials. In addition, for example, the molten pig iron preliminary processing control device 20 includes a general static control, and a predetermined mathematical model is used to determine the amount of oxygen to be blown into the converter 11 and the amount of cold material ( Hereafter, functions such as the amount of cold materials), the amount of input of auxiliary materials, etc. In addition, for example, the molten pig iron preliminary processing control device 20 has a function of controlling a measurement object, a measurement time point, and the like for a sub-gun measurement performed in a general dynamic control.

關於未圖示之各機能之具體處理(例如，上述之冷材及副原料投入之控制方法、在靜態控制之在吹煉開始前決定氧吹入量或各種冷材及副原料之投入量等之方法、副槍測量之控制方法)，由於可套用各種之公知之方法，故在此是省略詳細之說明。 Specific processing of each function not shown (for example, the above-mentioned control method for the input of cold materials and auxiliary materials, the static control of the amount of oxygen blowing or the input of various cold materials and auxiliary materials, etc. before the start of the blowing process, etc. Method and control method of sub-gun measurement), since various well-known methods can be applied, detailed description is omitted here.

熔融生鐵預備處理控制裝置20是以儲存在熔融生鐵預備處理資料庫21之各種資料、及排氣資料當作輸入值，而推定脫磷處理後之熔融生鐵中之碳濃度。然後，熔融生鐵預備處理控制裝置20是基於推定之熔融生鐵中之碳濃度而修正在脫磷處理前藉由靜態控制決定之氧吹入量及冷材量之指示值。熔融生鐵預備處理控制裝置20更進一步將推定之熔融生鐵中之碳濃度、以及經過修正之氧吹入量及冷材量之指示值朝輸入輸出部22輸出。另外，輸出至輸入輸出部22之各指示值是朝控制轉爐吹煉設備10之動作之測量控制裝置30輸出。測量控制裝置30是進行與從 熔融生鐵預備處理控制裝置20取得之各指示值對應之與往轉爐11內送酸及投入冷材相關之控制。 The molten pig iron pre-treatment control device 20 estimates the carbon concentration in the molten pig iron after dephosphorization treatment by taking various data stored in the molten pig iron pre-treatment database 21 and exhaust data as input values. Then, the molten pig iron preliminary processing control device 20 corrects the indicated values of the oxygen blow-in amount and the amount of cold materials determined by the static control before the dephosphorization process based on the estimated carbon concentration in the molten pig iron. The molten pig iron preliminary processing control device 20 further outputs the estimated values of the carbon concentration in the molten pig iron, and the corrected values of the oxygen blow-in amount and the cold material amount to the input / output unit 22. In addition, each of the instruction values output to the input / output unit 22 is output to a measurement control device 30 that controls the operation of the converter blowing equipment 10. The measurement control device 30 is The respective control values obtained by the molten pig iron preliminary processing control device 20 correspond to controls related to the feeding of acid into the converter 11 and the input of cold materials.

熔融生鐵預備處理控制裝置20之各機能部所具有之具體機能是後述。 The specific functions of each functional section of the molten pig iron preliminary processing control device 20 will be described later.

熔融生鐵預備處理資料庫21是將在熔融生鐵預備處理控制裝置20使用之各種資料儲存之資料庫，藉由儲存器等之記憶裝置而實現。熔融生鐵預備處理資料庫21舉例來說是如圖1所示，儲存熔融生鐵資料211、參數212、及目標資料213等。該等資料可以是透過未圖示之輸入裝置、通訊裝置而追加、更新、變更、或削除。熔融生鐵預備處理資料庫21所記憶之各種資料是藉由資料取得部201來叫出。另外，熔融生鐵預備處理資料庫21亦可以是儲存碳濃度推定部202之推定結果(例如，脫磷處理後之熔融生鐵中之碳濃度)、或修正量算出部203之修正結果(例如，氧吹入量之修正後之指示值)。附帶一提，雖然與本實施形態相關之具有熔融生鐵預備處理資料庫21之記憶裝置是如圖1所示，與熔融生鐵預備處理控制裝置20一體地構成，但在其他之實施形態，具有熔融生鐵預備處理資料庫21之記憶裝置可以是與熔融生鐵預備處理控制裝置20分離之構成。 The molten pig iron preliminary processing database 21 is a database that stores various data used in the molten pig iron preliminary processing control device 20, and is realized by a memory device such as a memory. The molten pig iron preliminary processing database 21 is, for example, as shown in FIG. 1, storing molten pig iron data 211, parameters 212, and target data 213. Such data may be added, updated, changed, or deleted through input devices and communication devices (not shown). Various data stored in the molten pig iron preparation processing database 21 are called by the data acquisition unit 201. In addition, the molten pig iron preliminary processing database 21 may store the estimation result of the carbon concentration estimation section 202 (for example, the carbon concentration in the molten pig iron after dephosphorization treatment) or the correction result of the correction amount calculation section 203 (for example, oxygen Corrected instruction value of blow-in volume). Incidentally, although the memory device having the molten pig iron preparation processing database 21 related to this embodiment is shown in FIG. 1 and is integrally configured with the molten pig iron preparation processing control device 20, in other embodiments, it has melting The memory device of the pig iron preparation processing database 21 may be configured separately from the molten pig iron preparation processing control device 20.

熔融生鐵資料211是與轉爐11內之熔融生鐵相關之各種資料。舉例來說，熔融生鐵資料211包含關於熔融生鐵之資訊(依各次加注而分之初期之熔融生鐵重量、熔融生鐵成分(碳、磷、矽、鐵、錳等)之濃度、熔融 生鐵溫度、熔融生鐵率等)。熔融生鐵資料211亦可以包含其他像是在一般之熔融生鐵預備處理及脫碳處理必要之各種資訊(例如，關於副原料及冷材之投入之資訊(關於副原料及冷材量之資訊)、關於副槍測量之資訊(關於測量對象、測量時間點等之資訊)、關於氧吹入量之資訊等)。參數212是被碳濃度推定部202及修正量算出部203拿來使用之各種參數。舉例來說，參數212包含以作業因素作為解釋變數之迴歸式之參數、及用於算出修正量之參數。目標資料213包含脫磷處理後、脫碳處理後、及副槍測量時等之熔融生鐵中(熔鋼中)之目標成分濃度及目標溫度等之資料。 The molten pig iron data 211 is various data related to the molten pig iron in the converter 11. For example, the molten pig iron information 211 contains information about the molten pig iron (the weight of the molten pig iron at the beginning of each injection, the concentration of molten pig iron (carbon, phosphorus, silicon, iron, manganese, etc.), the melting Pig iron temperature, molten pig iron rate, etc.). The molten pig iron data 211 may also include other information necessary for general molten pig iron preparation and decarburization (for example, information on the input of auxiliary raw materials and cold materials (information on the amount of auxiliary raw materials and cold materials), Information about sub-gun measurement (information about the measurement object, measurement time point, etc.), information about the oxygen blow-in amount, etc.). The parameter 212 is various parameters used by the carbon concentration estimation unit 202 and the correction amount calculation unit 203. For example, the parameter 212 includes a parameter of a regression formula using an operational factor as an explanatory variable, and a parameter for calculating a correction amount. The target data 213 includes data such as target component concentration and target temperature in molten pig iron (in molten steel) after dephosphorization treatment, after decarburization treatment, and during sub-gun measurement.

輸入輸出部22舉例來說是具有如下之機能：取得藉由碳濃度推定部202而求得之碳濃度之推定結果、或藉由修正量算出部203而求得之氧吹入量之修正值等之修正結果，朝各種輸出裝置輸出。舉例來說，輸入輸出部22可以是將從修正量算出部203取得之氧吹入量之修正後之指示值朝轉爐吹煉設備10輸出。藉此，實行將氧吹入量之修正後之指示值反映之吹煉。另外，輸入輸出部22亦可以是將推定之熔融生鐵中之碳濃度、或氧吹入量之修正後之指示值顯示給操作員。此情況下，輸入輸出部22亦可以是更進一步將藉由閱覽了顯示資訊之操作員之操作而輸入之與送氧或投入冷材等之指示相關之資訊朝轉爐吹煉設備10輸出。另外，輸入輸出部22亦可以是將熔融生鐵預備處理資料庫21所記憶之推定結果等輸出。 The input / output unit 22 has, for example, a function of obtaining an estimation result of the carbon concentration obtained by the carbon concentration estimation unit 202 or a correction value of an oxygen blowing amount obtained by the correction amount calculation unit 203. The correction result is output to various output devices. For example, the input / output unit 22 may output the corrected instruction value of the oxygen blowing amount obtained from the correction amount calculation unit 203 to the converter blowing equipment 10. With this, the blowing is performed by reflecting the corrected instruction value of the oxygen blowing amount. In addition, the input / output unit 22 may display an estimated value of the carbon concentration in the molten pig iron or a corrected instruction value of the oxygen blowing amount to the operator. In this case, the input / output unit 22 may further output the information related to the instructions for supplying oxygen or inputting cold materials, etc., which is input by an operator who has viewed the displayed information, to the converter blowing equipment 10. The input / output unit 22 may output an estimation result or the like stored in the molten pig iron preliminary processing database 21.

(測量控制裝置) (Measurement control device)

測量控制裝置30具有CPU、ROM、RAM、儲存器及通訊裝置等之硬體構成。測量控制裝置30具有如下機能：與轉爐吹煉設備10具有之各裝置進行通訊，控制轉爐吹煉設備10之整體之動作。舉例來說，測量控制裝置30是因應來自熔融生鐵預備處理控制裝置20之指示而控制往轉爐11之冷材及副原料之投入等。另外，測量控制裝置30是取得由排氣成分分析計101及排氣流量計102等之轉爐吹煉設備10之各裝置獲得之資料，而朝熔融生鐵預備處理控制裝置20發送。 The measurement control device 30 has a hardware configuration such as a CPU, a ROM, a RAM, a memory, and a communication device. The measurement control device 30 has a function of communicating with each device included in the converter blowing equipment 10 and controlling the overall operation of the converter blowing equipment 10. For example, the measurement control device 30 controls the input of cold materials and auxiliary materials to the converter 11 in response to an instruction from the molten pig iron preliminary processing control device 20. In addition, the measurement control device 30 acquires data obtained from each device of the converter blowing equipment 10 such as the exhaust gas composition analyzer 101 and the exhaust gas flow meter 102, and sends the data to the molten pig iron preliminary processing control device 20.

<2.由熔融生鐵預備處理控制裝置進行之處理> <2. Processing by the molten pig iron preliminary processing control device>

以下，依序說明圖1顯示之熔融生鐵預備處理控制裝置20之各機能。附帶一提，在以下之說明中，只要沒有特別說明，則各成分之濃度之單位(質量%)是記載成(%)。 Hereinafter, each function of the molten pig iron preliminary processing control device 20 shown in FIG. 1 will be described in order. Incidentally, in the following description, unless otherwise specified, the unit (mass%) of the concentration of each component is described as (%).

(資料取得部) (Data Acquisition Department)

資料取得部201是取得熔融生鐵預備處理資料庫21所記憶之熔融生鐵資料211、參數212、目標資料213、以及從排氣成分分析計101及排氣流量計102輸出的排氣資料。資料取得部201可以是在脫磷處理中將排氣成分分析計101及排氣流量計102所依序測量到之資料依序取得，亦可以是在脫磷處理後總括地取得。資料取得部201是將取得之資料朝碳濃度推定部202輸出。 The data acquisition unit 201 acquires molten pig iron data 211, parameters 212, target data 213, and exhaust gas data output from the exhaust gas component analyzer 101 and the exhaust gas flow meter 102, which are stored in the molten pig iron preliminary processing database 21. The data acquisition unit 201 may acquire the data sequentially measured by the exhaust gas composition analyzer 101 and the exhaust gas flow meter 102 during the dephosphorization process, or may acquire the data after the dephosphorization process. The data acquisition unit 201 outputs the acquired data to the carbon concentration estimation unit 202.

(碳濃度推定部) (Carbon concentration estimation section)

碳濃度推定部202是基於以資料取得部201取得之各種資料而推定脫磷處理後之熔融生鐵中之碳濃度。以下，針對碳濃度推定部202之碳濃度之推定方法進行說明。 The carbon concentration estimation unit 202 estimates the carbon concentration in the molten pig iron after the dephosphorization process based on various data obtained by the data acquisition unit 201. The method of estimating the carbon concentration of the carbon concentration estimating unit 202 will be described below.

脫磷處理後之熔融生鐵中之碳濃度可藉由脫磷處理前後之與熔融生鐵中之碳相關之質量平衡來推定。亦即，可以想到的是，脫磷處理前後之熔融生鐵所含有之碳之質量之差會與因為脫磷處理而產生之排氣所含有之碳之質量一致(亦即，質量平衡會守恆)。本發明人們對如此之使用與碳相關之質量平衡模型來推定脫磷處理後之熔融生鐵中之碳濃度之方式進行了檢討。 The carbon concentration in the molten pig iron after the dephosphorization treatment can be estimated from the mass balance related to the carbon in the molten pig iron before and after the dephosphorization treatment. That is, it is conceivable that the difference in the mass of the carbon contained in the molten pig iron before and after the dephosphorization treatment will be consistent with the mass of the carbon contained in the exhaust gas generated by the dephosphorization treatment (that is, the mass balance will be conserved) . The present inventors have reviewed the manner in which such a carbon-related mass balance model is used to estimate the carbon concentration in the molten pig iron after dephosphorization.

首先，基於排氣資料來算出因為脫磷處理而產生之排氣所含有之碳之質量(脫碳量)。基於排氣資料之脫碳量△C_offgas(ton)是如下述式(2)所示。 First, based on the exhaust gas data, the mass (decarbonization amount) of carbon contained in the exhaust gas generated by the dephosphorization treatment was calculated. The decarburization amount ΔC _offgas (ton) based on the exhaust gas data is shown in the following formula (2).

在此，由排氣資料求出之每單位時間之脫碳量wc[i](g/sec)是藉由下述式(3)而算出。 Here, the decarburization amount wc [i] (g / sec) per unit time determined from the exhaust gas data is calculated by the following formula (3).

在此，CO[i+N](%)是排氣中之CO濃度，CO₂[i+N](%)是排氣中之CO₂濃度，V_offgas[i](Nm³/hr(NTP))是總排氣流量。CO[i](%)及 CO₂[i](%)可藉由排氣成分分析計101而取得。另外，V_offgas[i](Nm³/hr(NTP))可藉由排氣流量計102而取得。另外，方括號[]內之i是表示排氣成分分析計101及排氣流量計102之取樣周期。另外，方括號[]內之N是與排氣成分分析計101之分析延遲(排氣到達排氣成分分析計101之設置位置為止之時間延遲)對應。分析延遲N之具體值可以因應在煙道12之排氣成分分析計101之設置位置等而適宜地決定。另外，「NTP」是Normal Temperature Pressure 的意思。將V_offgas[i]乘上1000之值除以3600的理由是將單位轉換成(L/sec)。另外，以22.4(L/mol)來除之理由是換算莫耳數。另外，12是碳之原子量。 Here, CO [i + N] (%) is the CO concentration in the exhaust gas, CO ₂ [i + N] (%) is the CO ₂ concentration in the exhaust gas, and V _offgas [i] (Nm ³ / hr ( NTP)) is the total exhaust flow. CO [i] (%) and CO ₂ [i] (%) can be obtained by the exhaust gas composition analyzer 101. In addition, V _offgas [i] (Nm ³ / hr (NTP)) can be obtained by the exhaust gas flow meter 102. In addition, i in square brackets [] indicates a sampling period of the exhaust gas composition analyzer 101 and the exhaust gas flow meter 102. In addition, N in square brackets [] corresponds to the analysis delay (time delay until the exhaust gas reaches the installation position of the exhaust gas composition analyzer 101) of the exhaust gas composition analyzer 101. The specific value of the analysis delay N can be appropriately determined depending on the installation position of the exhaust gas component analyzer 101 in the flue 12 and the like. In addition, "NTP" means Normal Temperature Pressure. The reason for multiplying V _offgas [i] by 1000 and dividing by 3600 is to convert the unit to (L / sec). The reason for dividing by 22.4 (L / mol) is to convert the number of moles. In addition, 12 is the atomic weight of carbon.

另一方面，基於脫磷處理前後之熔融生鐵中之碳濃度之成分實測之脫碳量(以後稱作基於成分變化之脫碳量)△C_c(ton)是如下述式(4)所示。 On the other hand, the amount of decarburization measured by a component based on the carbon concentration in the molten pig iron before and after the dephosphorization treatment (hereinafter referred to as the amount of decarburization based on a change in composition) ΔC _c (ton) is as shown in the following formula (4) .

在此，C_HM(%)是脫磷處理前之熔融生鐵中之碳濃度，W_HM(ton)是脫磷處理前之熔融生鐵之重量，C_SC(%)是脫磷處理前裝入轉爐11內之廢料中之碳濃度，W_SC(ton)是脫磷處理前裝入轉爐11內之廢料之重量，C_CM(%)是脫磷處理前之冷卻生鐵中之碳濃度，W_CM(ton)是脫磷處理前之冷卻生鐵之重量，C_sub,j(%)是脫磷處理前 投入轉爐11內之副原料j中之碳濃度，W_sub,j(ton)是脫磷處理前投入轉爐11內之副原料j之重量。該等實際量是含於熔融生鐵資料211。 Here, C _HM (%) is the carbon concentration in the molten pig iron before the dephosphorization treatment, W _HM (ton) is the weight of the molten pig iron before the dephosphorization treatment, and C _SC (%) is the converter put into the converter before the dephosphorization treatment. The carbon concentration in the waste material in _W11 (ton) is the weight of the waste material loaded into the converter 11 before dephosphorization treatment, and C _CM (%) is the carbon concentration in the cooling pig iron before dephosphorization treatment, W _CM ( ton) is the weight of cooled pig iron before dephosphorization treatment, C _{sub, j} (%) is the carbon concentration in the auxiliary raw material j put into converter 11 before dephosphorization treatment, W _{sub, j} (ton) is before dephosphorization treatment The weight of the auxiliary raw material j put into the converter 11. These actual amounts are included in the molten pig iron data 211.

另外，C_deP(%)是脫磷處理後之熔融生鐵中之碳濃度。 In addition, C _deP (%) is the carbon concentration in the molten pig iron after dephosphorization.

脫磷處理前後之與碳相關之質量達成平衡的情況下，基於排氣資料之脫碳量△C_offgas與基於成分變化之脫碳量△C_C會相等。亦即，基於排氣資料之脫碳量△C_offgas與基於成分變化之脫碳量△C_C之關係是如下述式(5)所示。 The case related to a balance of carbon with mass, based on the amount of exhaust gas decarburization data of _△ C offgas based on a change of the component is equal to the amount of decarburization will △ _C C before and after dephosphorization. That is, the amount of decarburization _△ C offgas exhaust gas based on the amount of decarburization based on the information of the composition change of △ C _C is the relationship as represented by the following formula (5).

[式5]△C _C =△C _offgas ‧‧‧(5) [Formula 5] △ C _C = △ C _offgas ‧‧‧ (5)

由以上，藉由將上述式(2)~(4)套用在上述式(5)，脫磷處理後之熔融生鐵中之碳濃度C_deP是如下述式(6)地表示。藉此，理論上可算出脫磷處理後之熔融生鐵中之碳濃度C_deP。 From the above, by applying the above formulae (2) to (4) to the above formula (5), the carbon concentration C _deP in the molten pig iron after the dephosphorization treatment is expressed as the following formula (6). With this, the carbon concentration C _deP in the molten pig iron after the dephosphorization treatment can be theoretically calculated.

然而，本發明人們發現，藉由上述式(6)獲得之基於排氣資料之脫磷處理後之熔融生鐵中之碳濃度C_deP會與從實際脫磷處理後而取樣之熔融生鐵所獲得之碳濃度 之實際值C_deP,a大幅地不同。這是因為，在上述式(2)及式(3)算出之基於排氣資料之脫碳量△C_offgas含有許多誤差。 However, the present inventors have found that the carbon concentration C _deP in the molten pig iron after dephosphorization treatment based on exhaust gas data obtained by the above formula (6) will be obtained from the molten pig iron sampled after the actual dephosphorization treatment. The actual value of carbon concentration, C _{deP, a} , varies greatly. This is because the decarburization amount ΔC _offgas calculated based on the exhaust gas data calculated in the above formulas (2) and (3) contains many errors.

關於如上述般之誤差，可以想到的是主要來自排氣流量計102之測量誤差。當排氣通過排氣流量計102之配管時，可能有從轉爐11產生之煤等之粉塵進入配管的情形。因為如此之粉塵附著於配管內(例如孔口等)之情形，配管內之排氣之通過變成不穩定之狀態，排氣流量計102之測量誤差變大。由於排氣流量計102之配管之內部之狀態時時刻刻變化，故難以抑制由排氣流量計102產生之測量誤差。 Regarding the errors as described above, it is conceivable that the measurement errors mainly come from the exhaust flow meter 102. When the exhaust gas passes through the piping of the exhaust gas flow meter 102, there may be cases where dust such as coal generated from the converter 11 enters the piping. When such dust adheres to the piping (such as an orifice), the passage of the exhaust gas in the piping becomes unstable, and the measurement error of the exhaust flow meter 102 becomes large. Since the internal state of the piping of the exhaust gas flow meter 102 changes from moment to moment, it is difficult to suppress measurement errors caused by the exhaust gas flow meter 102.

於是，經過本發明人們努力研究之結果，而想出在上述式(5)加入用於補正基於排氣資料之脫碳量△C_offgas之補正值、亦即加入補正項△C_correct(ton)，來改善藉由上述式(6)獲得之脫磷處理後之熔融生鐵中之碳濃度C_deP之推定精度。在上述式(5)加入補正項△C_correct，則如下述式(7)所示。 Therefore, after studying the results of the present inventors' hard work, it is thought to add a correction value for correcting the decarburization amount △ C _offgas based on the exhaust gas data in the above formula (5), that is, add a correction term △ C _correct (ton) To improve the estimation accuracy of the carbon concentration C _deP in the molten pig iron after the dephosphorization treatment obtained by the above formula (6). Adding a correction term ΔC _{correct to the} above formula (5) is as shown in the following formula (7).

[式7]△C _C =△C _offgas +△C _correct ‧‧‧(7) [Formula 7] △ C _C = △ C _offgas + △ C _correct ‧‧‧ (7)

該補正項△C_correct之推定模型是藉由各種統計手法而建構。舉例來說，與本實施形態相關之補正項△C_correct是藉由周知之複迴歸分析手法而獲得，是藉由以各種之作業因素X作為解釋變數之迴歸式而算出之目的變數。具體而言，補正項△C_correct是如下述式(8)所示。 The estimation model of the correction term △ C _correct is constructed by various statistical methods. For example, the correction term ΔC _correct related to this embodiment is obtained by a well-known complex regression analysis method, and is an objective variable calculated by a regression formula using various operational factors X as explanatory variables. Specifically, the correction term ΔC _correct is as shown in the following formula (8).

在此，α_k是與第k個作業因素X_k對應之迴歸係數，α₀是常數。另外，作業因素X之具體例是如下述表1所示。不過，下述表1顯示之作業因素僅僅是一例，在補正項△C_correct之推定可考慮各式各樣之作業因素X。另外，補正項△C_correct之推定可以是使用下述表1所包含之作業因素之全部或一部分。 Here, α _k is a regression coefficient corresponding to the k-th working factor X _k , and α ₀ is a constant. A specific example of the work factor X is shown in Table 1 below. However, the operating factors shown in Table 1 below are just examples, and various operating factors X may be considered in the estimation of the correction term △ C _correct . In addition, the estimation of the correction term ΔC _correct may be using all or part of the operating factors included in Table 1 below.

本發明人們發現，藉由將以上述之作業因素X_j作為解釋變數之補正項△C_correct加入質量平衡模型，而令脫磷處理後之熔融生鐵中之碳濃度C_deP之推定精度獲得改善。 The present inventors have found that by adding the correction factor ΔC _{correct using the} above-mentioned operational factor X _j as an explanatory variable to the mass balance model, the estimated accuracy of the carbon concentration C _deP in the molten pig iron after dephosphorization treatment is improved.

再者，經過本發明人們努力研究之結果，本發明人們發現，除了一般可想到之脫磷處理時之作業因素(熔融生鐵量、熔融生鐵率、熔融生鐵溫度、熔融生鐵成分、氧吹入量、副原料投入量等，相當於表1之編號1~編號N-2)之外，還將反映脫磷處理時之轉爐11內之熔渣之渣化狀況之作業因素反映在補正項△C_correct，藉此，脫磷處理後之熔融生鐵中之碳濃度C_deP之推定精度進一步獲得改善。 Furthermore, as a result of diligent research by the present inventors, the present inventors have found that in addition to the work factors (melted pig iron quantity, molten pig iron ratio, molten pig iron temperature, molten pig iron composition, and oxygen blow-in amount) that are generally conceivable during dephosphorization treatment In addition to the input amount of auxiliary materials, it is equivalent to No. 1 to No. N-2 in Table 1), and the operating factors that reflect the slagging status of the slag in the converter 11 during dephosphorization are reflected in the correction item △ C _Correct , thereby further improving the estimation accuracy of the carbon concentration C _deP in the molten pig iron after the dephosphorization treatment.

關於反映熔渣之渣化狀況之作業因素令脫磷處理後之熔融生鐵中之碳濃度C_deP之推定精度進一步獲得改善的理由，可想到的是因為熔渣之渣化狀況反映脫磷處理時之轉爐11內之脫碳氧效率。脫碳氧效率是顯示吹入轉爐11內之氧與熔融生鐵中之碳之反應效率之指標。若吹入之氧碰到在熱池面露出之熔融生鐵，則會發生脫碳反應。然而，在脫磷處理是優先進行以熔渣帶走磷。因此，在熔融生鐵之表面會存在有大量之熔渣。在此，隨著熔渣之渣化狀況，可能是因為吹入之氧不易碰到熔融生鐵而造成脫碳反應不易發生的情況，或者是即便吹入之氧不易碰到熔融生鐵，熔渣中之氧化鐵亦成為脫碳反應之氧供給源而令脫碳反應發生的情況。所以，難以單純地預測熔渣之渣化狀況會抑制或促進脫碳反應。然而，可推想的是，熔渣之渣化狀況可能對脫碳反應具有影響。亦即，可想到的是，轉爐11內之熔渣之渣化狀況對脫碳反應之容易發生之程度、亦即脫碳氧效率具有影響。所以，可將反映熔渣之渣化狀況之作業因素反映在補正項△C_correct，藉此，將由脫磷處理中之轉爐11之脫碳氧效率之變動造成之影響納入而推定脫磷處理後之熔融生鐵中之碳濃度C_deP。本發明人們想出藉此令脫磷處理後之熔融生鐵中之碳濃度C_deP之推定精度獲得改善。 Regarding the reason that the operational factors reflecting the slagging status of the slag have further improved the estimated accuracy of the carbon concentration C _deP in the molten pig iron after dephosphorization treatment, it is conceivable that the slagging status reflects the dephosphorization treatment Oxygen removal efficiency in converter 11. The decarburization oxygen efficiency is an index showing the reaction efficiency of the oxygen blown into the converter 11 and the carbon in the molten pig iron. If the blown oxygen hits the molten pig iron exposed on the surface of the hot pool, a decarburization reaction occurs. However, in the dephosphorization treatment, it is preferred to carry away the phosphorus with the slag. Therefore, a large amount of slag exists on the surface of the molten pig iron. Here, as the slag is slagged, the decarburization reaction may not easily occur because the blown oxygen does not easily touch the molten pig iron, or even the blown oxygen does not easily touch the molten pig iron and the slag. The iron oxide also becomes the oxygen supply source of the decarburization reaction and the decarburization reaction occurs. Therefore, it is difficult to predict simply that the slag slagging condition will suppress or promote the decarburization reaction. However, it is conceivable that the slag slagging condition may have an effect on the decarburization reaction. That is, it is conceivable that the slagging condition of the slag in the converter 11 has an influence on the degree to which the decarburization reaction easily occurs, that is, the decarburization oxygen efficiency. Therefore, the operational factors reflecting the slagging status of the slag can be reflected in the correction item △ C _correct , thereby taking into account the influence caused by the change in the decarburization and oxygenation efficiency of the converter 11 during the dephosphorization treatment and estimating the dephosphorization treatment The carbon concentration C _deP in the molten pig iron. The inventors have _conceived to improve the estimation accuracy of the carbon concentration C _deP in the molten pig iron after the dephosphorization treatment.

關於反應脫磷處理中之熔渣之渣化狀況之作業因素，如表1所示，舉例來說是包含聲級計值(db)及利用微波進行之熔渣高度之測量值(m)等。 The operating factors of the slag slagging status in the reaction dephosphorization process are shown in Table 1. For example, they include the sound level meter value (db) and the measurement value (m) of the slag height by microwave. .

聲級計值是藉由聲級計111而輸出之值。聲級計111是透過集音麥克風112取得轉爐11內之聲音來作為聲響訊號，當作聲級計值而輸出。聲級計值會隨著轉爐11內之熔渣之渣化狀況而變動。可藉由將聲級計值當作作業因素來使用，而將熔渣之渣化狀況反映在補正項△C_correct。 The sound level meter value is a value output by the sound level meter 111. The sound level meter 111 obtains the sound in the converter 11 through the sound collecting microphone 112 as a sound signal, and outputs it as a sound level meter value. The sound level meter value will change according to the slagging condition of the slag in the converter 11. The sound level meter value can be used as an operational factor, and the slagging status of the slag can be reflected in the correction item △ C _correct .

另外，熔渣等級是從未圖示之熔渣等級測量裝置輸出之值。熔渣等級測量裝置舉例來說是透過天線而取得朝轉爐11內照射之微波，由該微波解析熔渣等級。該熔渣等級會隨著轉爐11內之熔渣之渣化狀況而變動。與聲級計值同樣，可藉由將熔渣等級當作作業因素來使用，而將熔渣之渣化狀況反映在補正項△C_correct。 The slag level is a value output from a slag level measuring device (not shown). For example, the slag level measuring device obtains a microwave radiated into the converter 11 through an antenna, and analyzes the slag level by the microwave. The level of the slag varies according to the slagging condition of the slag in the converter 11. Like the sound level meter value, the slag level can be used as an operating factor, and the slag slagging status can be reflected in the correction term △ C _correct .

另外，如果能藉由其他之物理測量方法來把握熔渣之渣化狀況，則亦可將藉由該等測量方法而獲得之測量結果當作作業因素來使用。經過本發明人們努力研究之結果，發現適合將聲級計值當作反映熔渣之渣化狀況之作業因素來使用。 In addition, if the slag slagging status can be grasped by other physical measurement methods, the measurement results obtained by these measurement methods can also be used as operational factors. As a result of diligent research by the inventors, it was found that the sound level meter is suitable for use as an operating factor reflecting the slagging status of the slag.

附帶一提，隨然本實施形態是藉由複迴歸分析來建構補正項△C_correct之推定模型，但該推定模型亦可以是藉由其他之統計手法來建構。關於其他之統計手法，舉例來說，可以是類神經網路或隨機森林等之使用機械學習演算法之統計手法等。 Incidentally, although the present embodiment forms a presumption model of the correction term ΔC _correct by complex regression analysis, the presumption model can also be constructed by other statistical methods. Regarding other statistical methods, for example, a statistical method using a machine learning algorithm such as a neural network or a random forest can be used.

以上，針對補正項△C_correct之推定方法進行了說明。脫磷處理後之熔融生鐵中之碳濃度C_deP是藉由在 上述式(7)套用上述式(2)~(4)、及上述式(8)，而表示成如下述式(9)。 The estimation method of the correction term ΔC _correct has been described above. The carbon concentration C _deP in the molten pig iron after the dephosphorization treatment is expressed by the following formula (9) by applying the formulas (2) to (4) and the formula (8) to the formula (7).

碳濃度推定部202是藉由將資料取得部201所取得之各種資料代入上述式(9)，而推定脫磷處理後之熔融生鐵中之碳濃度C_deP。碳濃度推定部202是將推定之碳濃度C_deP朝修正量算出部203。另外，碳濃度推定部202亦可以是將推定之碳濃度C_deP朝輸入輸出部22輸出。 The carbon concentration estimation unit 202 estimates the carbon concentration C _deP in the molten pig iron after the dephosphorization treatment by substituting various data obtained by the data acquisition unit 201 into the above formula (9). The carbon concentration estimation unit 202 is a unit 203 for estimating the estimated carbon concentration C _deP toward the correction amount. The carbon concentration estimation unit 202 may output the estimated carbon concentration C _{deP to} the input / output unit 22.

(修正量算出部) (Correction calculation unit)

修正量算出部203是基於由碳濃度推定部202推定之碳濃度C_deP與目標資料213含有之脫磷處理後之目標碳濃度C_aim的比較結果，修正目標資料213含有之脫碳處理之氧吹入量。脫磷處理後之目標碳濃度C_aim、及脫碳處理之氧吹入量O_2,aim是由脫磷處理前之靜態控制所決定之量。修正量算出部203是使用上述之推定結果等而算出氧吹入量之修正量△O_2,correct。然後，修正量算出部203是使用氧吹入量之修正量△O_2,correct而更新原先決定之氧吹入量O_2,aim，取得更新後之氧吹入量O_2,corrected。 The correction amount calculation unit 203 corrects the decarbonized oxygen contained in the target data 213 based on a comparison result between the carbon concentration C _deP estimated by the carbon concentration estimation unit 202 and the target carbon concentration C _aim after dephosphorization included in the target data 213. Blow-in volume. The target carbon concentration C _aim after the dephosphorization treatment and the oxygen blowing amount O _{2, aim} of the decarburization treatment are determined by the static control before the dephosphorization treatment. The correction amount calculation unit 203 calculates the correction amount ΔO _{2, correct of the} oxygen injection amount using the above-mentioned estimation results and the like. Then, the correction amount calculation unit 203 updates the previously determined oxygen injection amount O _{2, aim} using the correction amount ΔO _{2, correct} of the oxygen injection amount _, and obtains the updated oxygen injection amount O _{2, corrected} .

氧量之修正量可藉由下述式(10)而算出。 The correction amount of the oxygen amount can be calculated by the following formula (10).

[式10] △O _2,correct =β×(C _aim -C _deP )‧‧‧(10) [Formula 10] △ O _{2, correct} = β × ( C _aim - C _deP ) ‧‧‧ (10)

在此，β是參數。關於該參數，舉例來說，可以是代入相當於與碳反應之氧之化學當量之理論值。藉此，算出相當於推定碳濃度C_deP與目標碳濃度C_aim之差之氧量。 Here, β is a parameter. Regarding this parameter, for example, it may be a theoretical value substituted with a chemical equivalent of oxygen that reacts with carbon. Thereby, the amount of oxygen corresponding to the difference between the estimated carbon concentration C _deP and the target carbon concentration C _aim is calculated.

修正量算出部203是將與修正後之氧吹入量O_2,corrected相關之資訊朝輸入輸出部22輸出。 The correction amount calculation unit 203 outputs information related to the _corrected oxygen injection amount O _{2 and correcteded} to the input / output unit 22.

附帶一提，修正量算出部203亦可以是除了修正原先決定之氧吹入量O_2,aim之外還修正原先之冷材量。舉例來說，當修正後之氧吹入量O_2,corrected是比原先決定之氧吹入量O_2,aim還少的情況下，在脫碳處理，轉爐11之熔融生鐵溫度可能會變低。因此，修正量算出部203舉例來說可以是基於修正後之氧吹入量O_2,corrected及熔融生鐵溫度(熔鋼溫度)而進行將投入轉爐11之冷材量減少之修正。藉此，即便在脫磷處理後對脫碳處理之氧吹入量進行了減少修正，亦可到達原先決定之目標熔鋼溫度。修正量算出部203是將與修正後之冷材量相關之資訊朝輸入輸出部22輸出。 Incidentally, the correction amount calculation unit 203 may also correct the original amount of cold materials in addition to the previously determined oxygen blowing amount O _{2, aim} . For example, when the corrected oxygen injection amount O _{2, corrected} is less than the originally determined oxygen injection amount O _{2, aim} , the molten pig iron temperature of the converter 11 may be lowered in the decarburization process. . Therefore, for example, the correction amount calculation unit 203 may perform a correction to reduce the amount of cold material input into the converter 11 based on the corrected oxygen injection amount O _{2, correcteded} and the molten pig iron temperature (steel temperature). With this, even if the oxygen blowing amount of the decarburization treatment is reduced and corrected after the dephosphorization treatment, the originally determined target molten steel temperature can be reached. The correction amount calculation unit 203 outputs information related to the amount of cold material after correction to the input / output unit 22.

以上，參考圖1而針對與本實施形態相關之熔融生鐵預備處理系統1之構成例進行了說明。 The configuration example of the molten pig iron preliminary processing system 1 according to the present embodiment has been described above with reference to FIG. 1.

<3.熔融生鐵預備處理方法之流程> <3. Process flow of molten pig iron preparation processing method>

圖2是顯示與本實施形態相關之熔融生鐵預備處理系統1之熔融生鐵預備處理方法之流程圖的圖。一面參考圖 2，一面針對與本實施形態相關之熔融生鐵預備處理系統1之熔融生鐵預備處理方法之流程進行說明。附帶一提，圖2顯示之各處理是與由圖1顯示之熔融生鐵預備處理控制裝置20實行之各處理對應。因此，圖2顯示之各處理之詳細是予以省略，僅止於說明各處理之概要。 FIG. 2 is a flowchart showing a molten pig iron preparation processing method of the molten pig iron preparation processing system 1 according to the present embodiment. Reference picture 2. The flow of the molten pig iron preparation processing method 1 of the molten pig iron preparation processing system 1 related to this embodiment will be described. Incidentally, each process shown in FIG. 2 corresponds to each process executed by the molten pig iron preparation process control device 20 shown in FIG. 1. Therefore, the details of each process shown in FIG. 2 are omitted, and only the outline of each process is explained.

在與本實施形態相關之熔融生鐵預備處理方法，首先，資料取得部201取得熔融生鐵資料及排氣資料(步驟S101)。具體而言，資料取得部201是取得在圖1顯示之熔融生鐵資料211、參數212、及目標資料213、以及由排氣成分分析計101及排氣流量計102所測量到的排氣資料。 In the molten pig iron preliminary processing method related to this embodiment, first, the data acquisition unit 201 acquires molten pig iron data and exhaust gas data (step S101). Specifically, the data acquisition unit 201 acquires the molten pig iron data 211, the parameters 212, and the target data 213 shown in FIG. 1 and the exhaust gas data measured by the exhaust gas component analyzer 101 and the exhaust gas flow meter 102.

接著，碳濃度推定部202是基於取得之各種資料而推定脫磷處理後之熔融生鐵中之碳濃度(步驟S103)。具體而言，碳濃度推定部202是藉由將熔融生鐵資料及排氣資料含有之各種資料代入上述式(9)，而推定脫磷處理後之熔融生鐵中之碳濃度。附帶一提，在上述式(9)之補正項△C_correct之推定，可選擇各種作業因素。舉例來說，為了令脫磷處理後之熔融生鐵中之碳濃度更加提昇，在△C_correct之推定，宜選擇反映熔渣之渣化狀況之作業因素。 Next, the carbon concentration estimation unit 202 estimates the carbon concentration in the molten pig iron after the dephosphorization process based on the obtained various data (step S103). Specifically, the carbon concentration estimation unit 202 estimates the carbon concentration in the molten pig iron after dephosphorization treatment by substituting various data contained in the molten pig iron data and exhaust gas data into the above-mentioned formula (9). Incidentally, in the estimation of the correction term △ C _correct in the above formula (9), various operating factors can be selected. For example, in order to further increase the carbon concentration in the molten pig iron after dephosphorization treatment, it is appropriate to select the operating factors that reflect the slagging status of the slag in the estimation of △ C _correct .

接著，修正量算出部203是基於推定之脫磷處理後之熔融生鐵中之碳濃度與脫磷處理後之熔融生鐵中之目標碳濃度的比較結果，修正在脫碳處理吹入轉爐11內之氧吹入量(步驟S105)。附帶一提，為了令熔融生鐵溫度 對上脫磷處理後之目標熔融生鐵溫度，宜配合氧吹入量之修正而將脫碳處理時之冷材量修正。另外，輸入輸出部22是對轉爐吹煉設備10發出指示，以基於經過修正之氧量及冷材量來進行氧之吹入及冷材之投入。轉爐吹煉設備10是進行因應該指示之與往轉爐11送酸及投入冷材相關之處理。 Next, the correction amount calculation unit 203 corrects the carbon concentration in the molten pig iron after dephosphorization treatment and the target carbon concentration in the molten pig iron after dephosphorization treatment, based on the comparison result of the estimated carbon concentration in the molten pig iron after dephosphorization treatment. Oxygen blowing amount (step S105). Incidentally, in order to make molten pig iron temperature Regarding the target molten pig iron temperature after the upper dephosphorization treatment, the amount of cold material during the decarburization treatment should be corrected in conjunction with the correction of the oxygen blowing amount. In addition, the input / output unit 22 instructs the converter blowing equipment 10 to perform oxygen blowing and cold material input based on the corrected oxygen and cold material quantities. The converter blowing equipment 10 performs processing related to the feeding of acid to the converter 11 and the input of cold materials in accordance with the instructions.

以上，參考圖2而說明了與本實施形態相關之熔融生鐵預備處理方法之處理順序。附帶一提，雖然在以上說明之實施形態是基於推定之脫磷處理後之熔融生鐵中之碳濃度而將朝轉爐11吹入之氧吹入量及投入之冷材量皆予以修正，但本實施形態並非限於此例。舉例來說，與本實施形態相關之熔融生鐵預備處理方法亦可以是僅將氧吹入量修正成令熔鋼中之碳濃度滿足目標值。此情況下，步驟S105可以是基於推定之脫磷處理後之熔融生鐵中之碳濃度而只計算令熔鋼中之碳濃度滿足目標值之氧吹入量。 The processing sequence of the molten pig iron preliminary processing method according to this embodiment has been described above with reference to FIG. 2. Incidentally, although the embodiment described above is based on the estimated carbon concentration in the molten pig iron after the dephosphorization treatment, the amount of oxygen to be blown into the converter 11 and the amount of cold material to be charged are corrected, but The embodiment is not limited to this example. For example, the molten pig iron pre-treatment method related to this embodiment may also be modified by only adjusting the oxygen blowing amount so that the carbon concentration in the molten steel satisfies the target value. In this case, step S105 may be based on the estimated carbon concentration in the molten pig iron after the dephosphorization treatment and calculate only the oxygen blow-in amount such that the carbon concentration in the molten steel meets the target value.

<4.總結> <4. Summary>

如以上說明，本實施形態是使用補正脫碳量來推定脫磷處理後之熔融生鐵中之碳濃度，前述補正脫碳量是將使用排氣資料所獲得之脫碳量藉由補正值而予以補正，前述補正值是藉由以脫磷處理時之作業因素作為解釋變數之迴歸式而表現。藉此，即便未在脫磷處理後進行副槍測量，亦可高精度地推定脫磷處理後之熔融生鐵中之碳濃度。 As described above, in this embodiment, the carbon concentration in the molten pig iron after dephosphorization treatment is estimated using the corrected decarburization amount. The aforementioned corrected decarburization amount is obtained by correcting the decarburization amount obtained using the exhaust gas data by the correction value. For correction, the aforementioned correction value is expressed by a regression formula that uses an operational factor during dephosphorization as an explanatory variable. Thereby, even if the sub-gun measurement is not performed after the dephosphorization treatment, the carbon concentration in the molten pig iron after the dephosphorization treatment can be estimated with high accuracy.

在與本實施形態相關之前述補正值之推 定，可藉由使用反映轉爐11內之熔渣之渣化狀況之作業因素來作為作業因素，而將轉爐11內之脫碳效率反映在上述之補正項。藉此，可更高精度地推定脫磷處理後之熔融生鐵中之碳濃度。 Inferring the aforementioned correction value related to this embodiment It is determined that the decarburization efficiency in the converter 11 can be reflected in the above-mentioned correction term by using an operation factor reflecting the slagging status of the slag in the converter 11 as the operation factor. Thereby, the carbon concentration in the molten pig iron after the dephosphorization treatment can be estimated with higher accuracy.

再者，根據本實施形態，使用碳濃度之推定結果而修正脫碳處理時吹入之氧吹入量。藉由基於修正後之氧量來進行脫碳處理，可更確實地獲得滿足脫碳處理後之目標碳濃度之熔鋼。另外，藉由因應氧吹入量之修正而將朝轉爐11內投入之冷材量修正，可更確實地獲得滿足脫碳處理後之目標熔鋼溫度之熔鋼。 Furthermore, according to this embodiment, the amount of oxygen blown in during the decarburization process is corrected using the estimated result of the carbon concentration. By performing the decarburization treatment based on the corrected amount of oxygen, a molten steel that satisfies the target carbon concentration after the decarburization treatment can be obtained more reliably. In addition, by correcting the amount of cold material that is fed into the converter 11 in response to the correction of the oxygen blowing amount, it is possible to more reliably obtain a molten steel that satisfies the target molten steel temperature after the decarburization treatment.

附帶一提，圖1顯示之構成只不過是與本實施形態相關之熔融生鐵預備處理系統1之一例，熔融生鐵預備處理系統1之具體構成並不限定於該例。熔融生鐵預備處理系統1只要是能實現以上說明之機能之構成即可，可採用一般能設想到之各式各樣之構成。 Incidentally, the configuration shown in FIG. 1 is only an example of the molten pig iron pre-treatment system 1 related to this embodiment, and the specific configuration of the molten pig iron pre-treatment system 1 is not limited to this example. The molten pig iron pre-treatment system 1 may be any configuration as long as it can realize the functions described above, and various configurations that can be generally conceived can be adopted.

舉例來說，熔融生鐵預備處理控制裝置20具有之各機能可以不是在1台裝置中全部實行，亦可以藉由複數裝置之合作來實行。舉例來說，可以是將具有資料取得部201、碳濃度推定部202、修正量算出部203中之其中1機能或任意之複數機能之一裝置連接成能與具有其他機能之其他裝置進行通訊，藉此實現與圖示之熔融生鐵預備處理控制裝置20同等之機能。 For example, each of the functions of the molten pig iron preliminary processing control device 20 may not be implemented in one device, or may be implemented by cooperation of a plurality of devices. For example, a device having one of the functions of the data acquisition section 201, the carbon concentration estimation section 202, and the correction amount calculation section 203 or any of a plurality of functions may be connected to communicate with other devices having other functions. This achieves the same function as the molten pig iron preliminary processing control device 20 shown in the figure.

另外，亦可以是製作用於實現圖1顯示之與本實施形態相關之熔融生鐵預備處理控制裝置20之各機 能之電腦程式，而安裝在PC等之處理裝置。另外，亦可以是提供儲存有如此之電腦程式之電腦可讀取之記錄媒體。記錄媒體舉例來說是磁碟、光碟、磁光碟、快閃記憶體等。另外，上述之電腦程式亦可以不使用記錄媒體、而透過例如網路來散布。 In addition, it is also possible to make each machine for realizing the molten pig iron preliminary processing control device 20 related to the present embodiment shown in FIG. 1. A computer program that can be installed on a processing device such as a PC. Alternatively, a computer-readable recording medium provided with such a computer program may be provided. The recording medium is, for example, a magnetic disk, an optical disk, a magneto-optical disk, a flash memory, or the like. In addition, the computer program described above may be distributed via, for example, the Internet without using a recording medium.

[實施例] [Example]

接著，說明本發明之實施例。為了確認本發明之效果，本實施例是針對藉由與本實施形態相關之熔融生鐵預備處理方法而獲得之補正項之有效性、與本實施形態相關之熔融生鐵預備處理方法之碳濃度之推定精度、與本實施形態相關之熔融生鐵預備處理方法之對實際作業之適用，進行了檢證。附帶一提，以下進行之實施例只是用於檢證本發明之效果，本發明並非限定於以下之實施例。 Next, an embodiment of the present invention will be described. In order to confirm the effect of the present invention, the present embodiment is an estimation of the effectiveness of the correction term obtained by the molten pig iron preliminary processing method related to this embodiment, and the carbon concentration of the molten pig iron preliminary processing method related to this embodiment. The accuracy and applicability of the molten pig iron pre-treatment method related to this embodiment to actual work have been verified. Incidentally, the following examples are only used to verify the effect of the present invention, and the present invention is not limited to the following examples.

(補正項之有效性及碳濃度之推定精度) (Effectiveness of correction term and estimated accuracy of carbon concentration)

首先，針對藉由與本實施形態相關之熔融生鐵預備處理方法而獲得之補正項△C_correct之有效性、與本實施形態相關之熔融生鐵預備處理方法之脫磷處理後之熔融生鐵中之碳濃度C_deP之推定精度進行檢證。 First, with regard to the effectiveness of the correction term ΔC _correct obtained by the molten pig iron preparation processing method related to this embodiment, the carbon in the molten pig iron after dephosphorization treatment of the molten pig iron preparation processing method related to this embodiment The estimated accuracy of the concentration C _deP is verified.

首先，實施例是使用排氣資料、熔融生鐵資料、作業因素而算出基於成分變化之脫碳量△C_c、基於排氣資料之脫碳量△C_offgas及補正項△C_correct。基於排氣資料之脫碳量△C_offgas是使用前述式(2)、式(3)而算出，補正項△C_correct是使用前述式(8)而算出。另外，基於成分變化之脫碳量△C_c是使用前述式(4)而算出。在此，在基於成分變 化之脫碳量△C_c、基於排氣資料之脫碳量△C_offgas及補正項△C_correct之間具有前述式(7)之關係。 First, embodiment is to use the exhaust gas data, data molten pig iron, calculated based on the amount of operational factors of the decarburization variation component _△ C _c, △ C offgas and a correction item △ C _correct amount of exhaust gas based on information of the decarburization. The decarburization amount ΔC _offgas based on the exhaust gas data is _calculated using the aforementioned formulas (2) and (3), and the correction term ΔC _correct is calculated using the aforementioned formula (8). The decarburization amount ΔC _c based on the change in the composition is calculated using the above-mentioned formula (4). Here, the relationship with the formula (7) between the △ C _c based on the change of the composition the amount of _{decarburization,} △ C offgas and a correction item △ C _correct amount of exhaust gas based on information of the decarburization.

另一方面，比較例是使用排氣資料及熔融生鐵資料而算出基於成分變化之脫碳量△C_c及基於排氣資料之脫碳量△C_offgas。基於排氣資料之脫碳量△C_offgas及基於成分變化之脫碳量△C_c的算出方法是與本實施例相同。在此，未使用補正項△C_correct，在基於成分變化之脫碳量△C_c及基於排氣資料之脫碳量△C_offgas之間具有前述式(5)之關係。 On the other hand, Comparative Example materials using exhaust gas and the molten pig iron data △ C _c is calculated based on the change of the composition of decarburization and decarburization _△ C offgas based on information of the amount of exhaust gas. _△ C offgas exhaust gas based on an amount of information of the decarburization and the method of calculating the change amount of decarburization △ C _c component based on the present embodiment is the same as Example. Here, the correction term is not used △ C _correct, have a relationship of the formula (5) of △ C _c between decarburization based on the amount of change _△ C offgas composition and amount of exhaust gas based on information of the decarburization.

附帶一提，為了檢證補正項△C_correct之有效性，在實施例及比較例是將脫磷處理後從轉爐取樣之熔融生鐵中之碳濃度之實際值代入上述式(4)之C_deP。亦即，在本實施例，基於成分變化之脫碳量△C_c是基於實際值而獲得之值。 Incidentally, in order to verify the validity of the correction item △ C _correct , in the examples and comparative examples, the actual value of the carbon concentration in the molten pig iron sampled from the converter after the dephosphorization treatment was substituted into the C _deP of the above formula (4) . That is, in the present embodiment, the amount of decarburization ΔC _c based on a change in composition is a value obtained based on an actual value.

另外，以未將反映熔渣之渣化狀況之作業因素使用在補正項△C_correct之推定的例子當作實施例1，以將反映熔渣之渣化狀況之作業因素使用在補正項△C_correct之推定的例子當作實施例2。表2顯示在實施例1、實施例2、比較例中被使用在脫磷處理後之熔融生鐵中之碳濃度之推定之資料及作業因素之清單。附帶一提，本實施例是使用聲級計值來作為反映熔渣之渣化狀況之作業因素。 In addition, an example in which an operation factor reflecting the slagging status of the slag is not used in the correction item △ C _correct is taken as Example 1, and an operation factor reflecting the slagging status of the slag is used in the correction item △ C. An example of _correct presumption is taken as the second embodiment. Table 2 shows a list of estimated data and operational factors of the carbon concentration in the molten pig iron used in the dephosphorization treatment in Example 1, Example 2, and Comparative Examples. Incidentally, in this embodiment, the sound level meter value is used as an operating factor reflecting the slagging status of the slag.

作為顯示補正項△C_correct之有效性之指標，將在實施例1、實施例2、比較例算出之基於排氣資料之脫碳量△C_offgas(加上補正項△C_correct之補正脫碳量)之與基於成分變化之脫碳量△C_c的誤差(推定誤差)分別算出，求出該推定誤差之標準差σ。標準差σ越小則推定誤差越小，亦即，可以說是補正項△C_correct之有效性高。 As an indicator showing the effectiveness of the correction term △ C _correct , the decarburization amount ΔC _offgas based on the exhaust gas data calculated in Example 1, Example 2, and the comparative example (plus the correction decarbonization of the correction term △ C _correct) The error (estimated error) between the amount) and the decarburization amount ΔC _c based on the composition change is calculated separately, and the standard deviation σ of the estimated error is obtained. The smaller the standard deviation σ, the smaller the estimation error, that is, it can be said that the validity of the correction term ΔC _correct is high.

另外，作為顯示碳濃度之推定精度之指標，將在實施例1及實施例2使用上述式(9)而推定之碳濃度C_deP與在脫磷處理後從轉爐取樣之熔融生鐵中之碳濃度之實際值的誤差分別算出，求出該推定誤差之標準差σ。標準差σ越小則推定誤差越小，亦即，可以說是推定精度高。 In addition, as an index showing the estimated accuracy of the carbon concentration, the carbon concentration C _deP estimated using the above formula (9) in Examples 1 and 2 and the carbon concentration in the molten pig iron sampled from the converter after the dephosphorization treatment will be used. The error of the actual value is calculated separately, and the standard deviation σ of the estimated error is obtained. The smaller the standard deviation σ, the smaller the estimation error, that is, it can be said that the estimation accuracy is high.

將結果顯示在圖3~圖5。圖3是顯示比較例之基於排氣資料之脫碳量△C_offgas之推定誤差的圖。圖4是顯示實施例1之基於排氣資料之脫碳量△C_offgas+補正項△C_correct之推定誤差的圖。另外，圖5是顯示實施例2之基於排氣資料之脫碳量△C_offgas+補正項△C_correct之推定誤差的圖。在各圖中，x軸是顯示基於由碳濃度之成分分析而來之實際值之脫碳量，y軸是顯示基於排氣資料(包含補正項△C_correct)之脫碳量。 The results are shown in FIGS. 3 to 5. FIG. 3 is a graph showing an estimation error of a decarburization amount ΔC _offgas based on exhaust gas data of a comparative example. FIG. 4 is a graph showing an estimated error of the decarburization amount ΔC _offgas + correction term ΔC _correct based on the exhaust gas data of Example 1. FIG. In addition, FIG. 5 is a graph showing an estimated error of the decarburization amount ΔC _offgas + correction term ΔC _correct based on the exhaust gas data of Example 2. In each figure, the x-axis shows the decarburization amount based on the actual value obtained from the component analysis of the carbon concentration, and the y-axis shows the decarburization amount based on the exhaust gas data (including the correction term ΔC _correct ).

參考圖3~圖5，比較例1之推定誤差之標準差σ是0.80，相較於此，實施例1之推定誤差之標準差σ是0.51，實施例2之推定誤差之標準差σ是0.40。由該結果可確認到，藉由補正項△C_correct之補正，脫碳量之對實際資 料之誤差變小。再者，由於實施例2之標準差σ顯示出比實施例1之標準誤差σ還小之值，故表示將反映熔渣之渣化狀況之作業因素加入補正項△C_correct是有效。 Referring to FIGS. 3 to 5, the standard deviation σ of the estimated error of Comparative Example 1 is 0.80, compared with that, the standard deviation σ of the estimated error of Example 1 is 0.51, and the standard deviation σ of the estimated error of Example 2 is 0.40. . From this result, it can be confirmed that by correcting the correction term △ C _correct , the error of the decarburization amount to the actual data becomes smaller. In addition, since the standard deviation σ of Example 2 shows a value smaller than the standard error σ of Example 1, it indicates that it is effective to add a work factor reflecting the slagging status of the slag to the correction term ΔC _correct .

接著，在圖6及圖7顯示與脫磷處理後之碳濃度之推定相關之結果。圖6是顯示實施例1之碳濃度C_deP之推定誤差的圖。另外，圖7是顯示實施例2之碳濃度C_deP之推定誤差的圖。在各圖中，x軸是顯示由碳濃度之成分分析而來之實際值，y軸是顯示使用與本實施形態相關之熔融生鐵預備處理方法而推定之碳濃度之推定值。 Next, the results related to the estimation of the carbon concentration after the dephosphorization treatment are shown in FIGS. 6 and 7. FIG. 6 is a graph showing an estimated error of the carbon concentration C _deP in Example 1. FIG. 7 is a graph showing an estimated error of the carbon concentration C _deP in Example 2. In each figure, the x-axis shows the actual value obtained from the component analysis of the carbon concentration, and the y-axis shows the estimated value of the carbon concentration estimated by using the molten pig iron preliminary processing method related to this embodiment.

參考圖6及圖7，實施例1之推定誤差之標準差σ是0.15，實施例2之推定誤差之標準差σ是0.11。因為任一標準差σ皆顯示低水準，故可以說是碳濃度C_deP之推定精度高。另外，由於實施例2之標準差σ顯示出比實施例1之標準誤差σ還小之值，故確認到可藉由使用反映熔渣之渣化狀況之作業因素而令碳濃度C_deP之推定精度更提高。 6 and 7, the standard deviation σ of the estimated error in Embodiment 1 is 0.15, and the standard deviation σ of the estimated error in Embodiment 2 is 0.11. Since any standard deviation σ shows a low level, it can be said that the estimation accuracy of the carbon concentration C _deP is high. In addition, since the standard deviation σ of Example 2 shows a value smaller than the standard error σ of Example 1, it was confirmed that the carbon concentration C _{deP can} be estimated by using operating factors that reflect the slagging status of the slag. Increased accuracy.

如以上所示，與比較例相較之下，本實施例可藉由導入補正項△C_correct而精度佳地推定碳濃度C_deP。尤其，如實施例2所示，可藉由將反映熔渣之渣化狀況之作業因素使用在補正項△C_correct之推定，令碳濃度C_deP之推定精度更加提高。 As shown above, compared with the comparative example, the present embodiment can estimate the carbon concentration C _deP with high accuracy by introducing a correction term ΔC _correct . In particular, as shown in Example 2, the estimation accuracy of the carbon concentration C _{deP can} be further improved by using the operation factor reflecting the slagging status of the slag in the correction term ΔC _correct .

(對作業之適用) (Applicable to operations)

接著，使用過去之作業實際資料來檢證與本實施形態相關之熔融生鐵預備處理方法是否可適用於作業。具體而言，對過去之作業實際資料，檢證藉由與實施形態相關之 熔融生鐵預備處理方法而獲得之脫磷處理後之熔融生鐵中之碳濃度之推定結果、以及脫碳處理時之氧吹入量及冷材量之修正結果。 Then, the actual operation data of the past is used to verify whether the molten pig iron preparation processing method related to this embodiment is applicable to the operation. Specifically, for the actual data of past operations, verification The estimated results of the carbon concentration in the molten pig iron after the dephosphorization treatment obtained by the molten pig iron preliminary treatment method, and the correction results of the oxygen blowing amount and the amount of cold materials during the decarburization treatment.

表3是顯示對作業實際資料之碳濃度之推定結果及氧量等之修正結果之套用例的表。參考表3，顯示熔融生鐵中之碳濃度、熔融生鐵溫度、氧吹入量、冷材量各自之預定值、實際值、推定值或修正指示值之履歷。預定值是藉由脫磷處理前之靜態控制而事先推定之值。實際值是在過去之作業中測量或設定之值。推定值及修正指示值是藉由與本實施形態相關之熔融生鐵預備處理方法而獲得之碳濃度之推定值、以及氧吹入量與冷材量之修正量之指示值。在此，氧吹入量之修正量之指示值舉例來說是相當於基於上述式(10)而獲得之修正後之氧吹入量O_2,corrected。 Table 3 is a table showing an application example of the estimation result of the carbon concentration of the actual operation data and the correction result of the oxygen amount. Referring to Table 3, a history of the predetermined value, actual value, estimated value, or correction instruction value of each of the carbon concentration, molten pig iron temperature, oxygen blowing amount, and amount of cold material in the molten pig iron is displayed. The predetermined value is a value estimated in advance by static control before the dephosphorization treatment. The actual value is a value measured or set in a past operation. The estimated value and the corrected instruction value are the estimated values of the carbon concentration obtained by the molten pig iron preliminary processing method related to the present embodiment, and the instruction values of the correction amounts of the oxygen blowing amount and the amount of the cold material. Here, the instruction value of the correction amount of the oxygen injection amount is equivalent to the corrected oxygen injection amount O _{2, corrected} obtained based on the above formula (10), for example.

參考表3，藉由脫磷處理前之靜態控制，設想脫磷處理結束時之熔融生鐵中之碳濃度是4.0%，脫碳處理中之副槍測量時之熔鋼中之碳濃度是0.5%，脫碳處理之結束時之熔鋼中之碳濃度(目標碳濃度)是0.1%。因應於此，藉由脫磷處理前之靜態控制，將氧吹入量決定成在脫碳處理開始時是7.0Nm³/ton，在脫碳處理中之副槍測量時是25.0Nm³/ton(7.0+18.0)，在脫碳處理之結束時是30.0Nm³/ton(7.0+18.0+5.0)。關於冷材量之值，脫磷吹煉中是2.0ton，從脫碳處理之開始至副槍測量時是5.0ton。 Referring to Table 3, by static control before dephosphorization treatment, it is assumed that the carbon concentration in the molten pig iron at the end of the dephosphorization treatment is 4.0%, and the carbon concentration in the molten steel at the time of the measurement by the sub-gun in the decarburization treatment is 0.5% The carbon concentration (target carbon concentration) in the molten steel at the end of the decarburization treatment is 0.1%. In response thereto, the former by Static Control dephosphorization, will determine the amount of oxygen blown into the start of the decarburization treatment is 7.0Nm ³ / ton, when the sub-lance decarburization measurements 25.0Nm ³ / ton (7.0 + 18.0) and 30.0 Nm ^{3 /} ton (7.0 + 18.0 + 5.0) at the end of the decarburization treatment. Regarding the value of the amount of cold materials, it was 2.0 tons during dephosphorization and blowing, and 5.0 tons from the start of the decarburization treatment to the measurement by the sub-gun.

然而，實際作業之副槍測量時之熔鋼中之碳濃度是0.10%。另一方面，副槍測量時之熔融生鐵溫度仍是預定值之1600℃。結果，在脫碳處理之結束時，熔鋼中之碳濃度變成比原先之目標碳濃度還要低之0.04%。可以想到的理由是脫磷處理之結束時之熔融生鐵中之碳濃度比原先決定之4.0%還要低。 However, the carbon concentration in the molten steel at the time of the actual measurement of the sub-gun was 0.10%. On the other hand, the molten pig iron temperature at the time of the sub-gun measurement was still 1600 ° C, which was a predetermined value. As a result, at the end of the decarburization process, the carbon concentration in the molten steel became 0.04% lower than the original target carbon concentration. The conceivable reason is that the carbon concentration in the molten pig iron at the end of the dephosphorization treatment was lower than the originally determined 4.0%.

另一方面，根據與本實施形態相關之熔融生鐵預備處理方法，將脫磷處理之結束時之熔融生鐵中之碳濃度推定成3.5%。另外，因應該推定結果，將從脫碳處理之開始至副槍測量時之氧量從18.0修正成13.0Nm³/ton。再者，因應碳濃度之推定結果及氧量之修正結果，將冷材量修正成2.5ton。由表3顯示之結果可察知，若基於該修正來進行作業，則副槍測量時之碳濃度會滿足事先設想之0.5%，故令脫碳處理之結束時之熔鋼中之碳濃度沒有下吹而接近目標碳濃度是可能的。亦即，可藉由將與本實施形 態相關之熔融生鐵預備處理方法套用到實際作業，而令熔鋼中之碳濃度更確實地命中目標碳濃度。 On the other hand, according to the molten pig iron preliminary processing method related to this embodiment, the carbon concentration in the molten pig iron at the end of the dephosphorization treatment is estimated to be 3.5%. In addition, according to the estimation result, the amount of oxygen from the start of the decarburization treatment to the measurement of the sub-gun was corrected from 18.0 to 13.0 Nm ³ / ton. In addition, the amount of cold material was corrected to 2.5 tons in accordance with the estimation result of the carbon concentration and the correction result of the oxygen amount. From the results shown in Table 3, it can be known that if the operation is performed based on the correction, the carbon concentration during the measurement of the sub-gun will meet the 0.5% expected in advance, so that the carbon concentration in the molten steel at the end of the decarburization treatment is not reduced. It is possible to approach the target carbon concentration. That is, by applying the molten pig iron pre-treatment method related to this embodiment to actual work, the carbon concentration in the molten steel can be more accurately hit the target carbon concentration.

以上雖然是一面參考附加圖面一面詳細說明本發明之較佳實施形態，但本發明並不限定於該例。對在本發明所屬技術領域中具有通常知識者而言，可在申請專利範圍所記載之技術思想之範疇內想出各種變更例或修正例是非常明顯，而這些當然亦屬於本發明之技術範圍。 Although the preferred embodiment of the present invention has been described in detail with reference to the attached drawings, the present invention is not limited to this example. It is very obvious for those who have ordinary knowledge in the technical field to which the present invention pertains to conceive various modifications or amendments within the scope of the technical ideas described in the scope of patent application, and these naturally belong to the technical scope of the present invention. .

Claims (8)

一種熔融生鐵預備處理方法，是在使用轉爐之熔融生鐵預備處理中包含以下步驟：資料取得步驟，取得與脫磷處理前之熔融生鐵相關的熔融生鐵資料、以及包含在脫磷處理時從前述轉爐排出之排氣成分及排氣流量的排氣資料；碳濃度推定步驟，將基於前述排氣資料而算出之脫磷處理時之脫碳量，使用基於前述脫磷處理時之作業因素而算出之補正值來予以補正，並基於經過補正之脫碳量與前述熔融生鐵資料而推定脫磷處理後之碳濃度。A molten pig iron preliminary treatment method includes the following steps in a molten pig iron preliminary treatment using a converter: a data acquisition step, obtaining molten pig iron data related to molten pig iron before dephosphorization treatment, and including from the aforementioned converter during dephosphorization treatment Exhaust gas data of exhaust gas components and exhaust gas flow; in the carbon concentration estimation step, the decarburization amount during dephosphorization treatment calculated based on the exhaust gas data is calculated using the operation factors during the dephosphorization treatment. The correction value is used for correction, and the carbon concentration after dephosphorization treatment is estimated based on the corrected decarburization amount and the aforementioned molten pig iron data. 如請求項1之熔融生鐵預備處理方法，其中在前述碳濃度推定步驟，前述補正值是藉由以前述作業因素作為解釋變數之迴歸式而算出。The molten pig iron preparation method according to claim 1, wherein in the carbon concentration estimation step, the correction value is calculated by a regression formula using the operation factor as an explanatory variable. 如請求項1或2之熔融生鐵預備處理方法，其中前述脫磷處理時之作業因素是包含顯示前述脫磷處理時之熔渣之渣化狀況之作業因素。The molten pig iron pretreatment method according to claim 1 or 2, wherein the operation factors during the aforementioned dephosphorization treatment include operation factors that indicate the slagging status of the slag during the aforementioned dephosphorization treatment. 如請求項3之熔融生鐵預備處理方法，其中前述顯示熔渣之渣化狀況之作業因素是包含與前述轉爐內之聲響資訊相關之作業因素。For example, the method for preparing molten pig iron according to claim 3, wherein the operation factors showing the slagging status of the molten slag include operation factors related to the sound information in the converter. 如請求項1或2之熔融生鐵預備處理方法，其中在前述資料取得步驟更取得前述脫磷處理後之目標碳濃度、及在前述脫磷處理後進行之脫碳處理之往前述轉爐內之氧吹入量；前述熔融生鐵預備處理方法更包含：氧量修正步驟，基於推定之前述脫磷處理後之碳濃度及前述脫磷處理後之目標碳濃度的比較結果，將前述氧吹入量修正。For example, the method for preparing molten pig iron according to claim 1 or 2, wherein the target carbon concentration after the dephosphorization treatment and the oxygen from the decarburization treatment after the dephosphorization treatment to the converter are obtained in the foregoing data obtaining step. The amount of blow-in; the method for preparing molten pig iron further includes an oxygen amount correction step, which corrects the amount of oxygen blow-in based on a comparison result between the estimated carbon concentration after the dephosphorization treatment and the target carbon concentration after the dephosphorization treatment. . 如請求項3之熔融生鐵預備處理方法，其中在前述資料取得步驟更取得前述脫磷處理後之目標碳濃度、及在前述脫磷處理後進行之脫碳處理之往前述轉爐內之氧吹入量；前述熔融生鐵預備處理方法更包含：氧量修正步驟，基於推定之前述脫磷處理後之碳濃度及前述脫磷處理後之目標碳濃度的比較結果，將前述氧吹入量修正。For example, the method for preparing molten pig iron according to claim 3, wherein the target carbon concentration after the dephosphorization treatment and the decarburization treatment performed after the dephosphorization treatment are performed before the data acquisition step. The aforementioned molten pig iron preliminary treatment method further includes an oxygen amount correction step of correcting the oxygen blow-in amount based on a comparison result between the estimated carbon concentration after the dephosphorization process and the target carbon concentration after the dephosphorization process. 如請求項4之熔融生鐵預備處理方法，其中在前述資料取得步驟更取得前述脫磷處理後之目標碳濃度、及在前述脫磷處理後進行之脫碳處理之往前述轉爐內之氧吹入量；前述熔融生鐵預備處理方法更包含：氧量修正步驟，基於推定之前述脫磷處理後之碳濃度及前述脫磷處理後之目標碳濃度的比較結果，將前述氧吹入量修正。For example, the molten pig iron pretreatment method of claim 4, wherein the target carbon concentration after the dephosphorization treatment and the decarburization treatment performed after the dephosphorization treatment are performed before the data acquisition step. The aforementioned molten pig iron preliminary treatment method further includes an oxygen amount correction step of correcting the oxygen blow-in amount based on a comparison result between the estimated carbon concentration after the dephosphorization process and the target carbon concentration after the dephosphorization process. 一種熔融生鐵預備處理控制裝置，是控制使用轉爐之熔融生鐵預備處理的熔融生鐵預備處理控制裝置，具有：資料取得部，取得與脫磷處理前之熔融生鐵相關的熔融生鐵資料、以及包含在脫磷處理時從前述轉爐排出之排氣成分及排氣流量的排氣資料；碳濃度推定部，將基於前述排氣資料而算出之脫磷處理時之脫碳量，使用基於前述脫磷處理時之作業因素而算出之補正值來予以補正，並基於經過補正之脫碳量與前述熔融生鐵資料而推定脫磷處理後之碳濃度。A molten pig iron pre-treatment control device is a molten pig iron pre-treatment control device for controlling molten pig iron pre-treatment using a converter. The molten pig iron preparation processing control device includes a data acquisition unit that acquires molten pig iron data related to molten pig iron before dephosphorization treatment, and includes Exhaust gas data of exhaust gas components discharged from the converter during the phosphorus treatment and exhaust gas flow; the carbon concentration estimation unit uses the amount of decarburization during the dephosphorization treatment calculated based on the exhaust gas data, and uses The correction value calculated based on operational factors is corrected, and the carbon concentration after dephosphorization treatment is estimated based on the corrected decarburization amount and the aforementioned molten pig iron data.