Iron tapping regulation and control method for iron making furnace

Abstract

The invention discloses a method for regulating and controlling tapping of an ironmaking furnace, which aims to solve the technical problem of poor stability of steelmaking production in the prior art, and comprises the following steps: in the process of receiving molten iron of the ironmaking furnace by an iron receiving container, acquiring comprehensive heat of the molten iron in the iron receiving container; under the condition that the comprehensive heat is larger than a first preset value, the iron receiving amount of the iron receiving container is not larger than a set amount; under the condition that the comprehensive heat is smaller than a second preset value, the iron receiving amount of the iron receiving container is larger than a set amount; wherein the first preset value is greater than the second preset value; and the iron receiving container is controlled to receive the molten iron with the iron receiving amount. According to the iron tapping regulation and control method for the iron making furnace, the stability of steel making production is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of ironmaking, and particularly relates to a method for regulating and controlling the tapping of an ironmaking furnace. Background Art

[0002] In the modern iron and steel industry, blast furnaces are the main ironmaking equipment. During the production process, molten iron is continuously generated in the furnace and discharged from multiple tapping holes in turn. The duration of continuous tapping at each tapping hole is about 2 hours. The equipment for receiving molten iron is generally a torpedo-type hot metal mixer or a ladle.

[0003] In the related art, the amount of molten iron received by the equipment for receiving molten iron is determined according to the amount of molten iron charged in the next steelmaking process, generally 70% - 100% of the furnace charge amount in the steelmaking process, and is set as a fixed value according to the steelmaking production plan, the market supply and price of various metal materials for a certain period. For example, a 100-ton converter in a steel plant plans to continuously smelt common steel grades in the next three days. Since the market price of scrap steel is relatively high, the metal charge structure in the furnace is fixedly set as "95 tons of blast furnace molten iron + 10 tons of in-plant recycled scrap steel". However, this production method will result in poor production stability of the converter in the steelmaking process. Summary of the Invention

[0004] To solve the technical problem of poor production stability of the converter in the above-mentioned steelmaking process, the present invention provides a method for regulating and controlling the tapping of an ironmaking furnace.

[0005] The technical solution of the present invention is as follows:

[0006] The present invention provides a method for regulating and controlling the tapping of an ironmaking furnace, including the following steps:

[0007] During the process of receiving molten iron from the ironmaking furnace by the molten iron receiving container, obtain the comprehensive heat of the molten iron in the molten iron receiving container;

[0008] When the comprehensive heat is greater than the first preset value, the amount of molten iron received by the molten iron receiving container is not higher than the set amount; when the heat is less than the second preset value, the amount of molten iron received by the molten iron receiving container is greater than the set amount; wherein, the first preset value is greater than the second preset value;

[0009] Control the molten iron receiving container to receive the molten iron of the amount of molten iron received.

[0010] In some embodiments, when the comprehensive heat is greater than the first preset value, the amount of molten iron received by the molten iron receiving container is less than the set amount; when the comprehensive heat is less than the first preset value and greater than the second preset value, the amount of molten iron received by the molten iron receiving container is equal to the set amount.

[0011] In some embodiments, the obtaining of the comprehensive heat of the molten iron in the molten iron receiving container specifically includes:

[0012] Measure the temperature and silicon content of the molten iron in the ladle.

[0013] According to T = a×Tz + b×Si + c, determine the comprehensive heat T of the molten iron in the ladle, where a, b, and c are all constants, with values of 1, 250, and -30 respectively, Tz is the temperature of the molten iron, and Si is the silicon content of the molten iron.

[0014] In some embodiments, when the amount of molten iron in the ladle is 50% - 70% of the set amount, measure the temperature and silicon content of the molten iron in the ladle.

[0015] In some embodiments, the first preset value and the second preset value are obtained by the following method:

[0016] Obtain the historical temperature and historical silicon content of the multiple ladles of molten iron charged into the steelmaking furnace.

[0017] Calculate the heat of the multiple ladles of molten iron based on the historical temperature and historical silicon content.

[0018] Sort the heat of the multiple ladles of molten iron from largest to smallest. Among them, the average value of the heat of the molten iron in the top 5 - 12% is the first preset value, and the average value of the heat of the molten iron in the bottom 5 - 12% is the second preset value.

[0019] In some embodiments, the ladle filling amount is less than the set amount, specifically: the ladle filling amount is 80 - 95% of the set amount.

[0020] In some embodiments, the ladle filling amount is greater than the set amount, specifically: the ladle filling amount is 105 - 120% of the set amount.

[0021] In some embodiments, the ladle filling amount is less than the set amount, specifically: the ladle filling amount is 90 - 98% of the set amount; the ladle filling amount is greater than the set amount, specifically: the ladle filling amount is 102 - 110% of the set amount.

[0022] In some embodiments, the capacity of the ladle is 50 - 400t.

[0023] In some embodiments, the ladle filling time is 10 - 60min.

[0024] The beneficial effects of the present invention at least include:

[0025] A method for regulating the tapping of an iron-smelting furnace provided by the present invention, during the process of receiving molten iron from the iron-smelting furnace by a molten-iron receiving container, obtains the comprehensive heat of the molten iron in the molten-iron receiving container; when the comprehensive heat is greater than a first preset value, the amount of molten iron received by the molten-iron receiving container is not higher than a set amount; when the comprehensive heat is less than a second preset value, the amount of molten iron received by the molten-iron receiving container is greater than the set amount; wherein, the first preset value is greater than the second preset value; controls the molten-iron receiving container to receive the molten iron in the amount of the received amount of molten iron.

[0026] Taking the comprehensive heat of the molten iron being tapped as a comparison benchmark, the accuracy of the tapping amount is higher. Comparing this comprehensive heat with two preset values to determine the tapping amount. When the comprehensive heat is greater than the first preset value, the amount of molten iron received is not higher than the set amount, that is, normal tapping or less tapping. In the case of less tapping, in order to ensure the total charging amount in the converter steelmaking process, the charging amount of steel scrap for cooling will be increased, so that the total iron amount and total heat input by the raw materials in the converter smelting are maintained at a certain level.

[0027] When the comprehensive heat is less than the second preset value, the amount of molten iron received is greater than the set amount, that is, more tapping. In this way, in order to ensure the total charging amount in the converter steelmaking process, the charging amount of steel scrap for cooling will be reduced, so that the total heat input by the raw materials in the converter smelting is kept as close as possible to the total heat of the converter process in the case where the comprehensive heat is greater than the first preset value.

[0028] Therefore, the heat input by the raw materials (molten iron and steel scrap) for each furnace of converter smelting fluctuates little, the operations for a certain steel grade during the converter smelting process are basically the same, and the differences in the end-point temperatures of different converter heats are small, thereby improving the production stability of the converter in the steelmaking process. Description of the Drawings

[0029] Figure 1 Shows the process step diagram of a method for regulating the tapping of an iron-smelting furnace according to an embodiment of the present application; Detailed Embodiments

[0030] In order to enable those skilled in the art in the technical field to which the present application belongs to more clearly understand the present application, the technical solutions of the present application will be described in detail below with reference to the drawings through specific embodiments.

[0031] In converter steelmaking, molten iron and steel scrap raw materials need to be added for smelting, and a suitable end-point temperature is required at the end of the converter smelting. Since the heat input by the raw materials of molten iron and steel scrap added to the converter is affected by the temperature of the molten iron, the differences between different converter heats are relatively large. This will cause that in the converter smelting operation, furnace heats with low temperatures may need to add ferro-silicon heat supplement agents, while furnace heats with high temperatures may need to add coolants. The converter operation parameters and production rhythms of each furnace are very different, affecting the stability of converter steelmaking.

[0032] The present application provides a method for regulating the tapping of an ironmaking furnace. The tapping amount is regulated according to the comprehensive heat of the current molten iron, so that the heat fluctuation brought by the converter raw materials is small, and the stability of converter smelting is improved.

[0033] Please refer to Figure 1 , the method for regulating the tapping of an ironmaking furnace provided by the present application includes the following steps:

[0034] S1. During the process of receiving the molten iron from the ironmaking furnace by the iron-receiving container, obtain the comprehensive heat of the molten iron in the iron-receiving container;

[0035] S2. When the comprehensive heat is greater than the first preset value, the iron-receiving amount of the iron-receiving container is not higher than the set amount; when the heat is less than the second preset value, the iron-receiving amount of the iron-receiving container is greater than the set amount; wherein, the first preset value is greater than the second preset value;

[0036] S3. Control the iron-receiving container to receive the iron-receiving amount of molten iron.

[0037] The iron-receiving container can be a torpedo ladle, a tundish or a torpedo can, and the ironmaking furnace can be a blast furnace. The iron-receiving by the iron-receiving container means that the molten iron from the blast furnace is tapped into the iron-receiving container. The set amount is generally the data estimated or calculated based on the molten iron charging amount of the converter. Obtain the comprehensive heat of the molten iron in the iron-receiving container during the iron-receiving process, and then use the comprehensive heat of the current molten iron to determine the iron-receiving amount of the iron-receiving container.

[0038] When the comprehensive heat is greater than the first preset value, it means that the comprehensive heat of the molten iron tapped into the iron-receiving container is relatively high. In converter smelting, more scrap steel can be added while still ensuring the tapping temperature of the converter. Therefore, when the comprehensive heat is greater than the first preset value, the iron-receiving amount of the iron-receiving container is not higher than the set amount, that is, the amount of molten iron tapped into the iron-receiving container is less or the normal tapping amount. When the iron-receiving amount of the iron-receiving container is equal to the set amount, the iron-receiving process in the ironmaking plant will be simplified. The charging amount of the converter generally remains unchanged. When the amount of molten iron in the iron-receiving container is the set amount, the heat in the converter smelting stage will be slightly more. When the amount of molten iron in the iron-receiving container is less than the set amount, the addition amount of scrap steel can be increased. The molten iron with a higher comprehensive heat can melt the scrap steel in converter smelting, making full use of the heat in the molten iron, and improving the scrap ratio on the premise of ensuring the tapping temperature of the converter. That is to say, less molten iron with a high comprehensive heat combined with more scrap steel can not only reach the end-point temperature of the converter but also will not waste heat.

[0039] The comprehensive heat is less than the second preset value, indicating that the comprehensive heat of the molten iron in the iron-receiving container is relatively low. During the converter smelting stage, heat may be insufficient and a heat supplement agent needs to be added. Therefore, when the comprehensive heat is less than the second preset value, the iron-receiving amount of the iron-receiving container is greater than the set amount, that is, the amount of molten iron tapped into the iron-receiving container is relatively large. In this way, the amount of scrap steel added during the converter stage is reduced, thus ensuring the charging amount of the converter. That is, more low-heat molten iron is combined with less scrap steel, which can not only ensure the tapping temperature of the converter but also eliminate the need for additional heat sources.

[0040] That is to say, by adjusting the amount of tapped iron according to the comprehensive heat of the currently tapped molten iron, it can be matched with the amount of scrap steel added to the converter, so that the heat level brought in by the raw materials for each furnace fluctuates little, improving the stability of converter production in the steelmaking process.

[0041] In some embodiments, when the comprehensive heat is greater than the first preset value, the iron-receiving amount of the iron-receiving container is less than the set amount; the charging amount of the converter generally remains unchanged. In this way, the amount of scrap steel added can be increased. The molten iron with a higher comprehensive heat can melt the scrap steel during converter smelting, making full use of the heat in the molten iron. On the premise of ensuring the tapping temperature of the converter, the scrap ratio is increased. That is to say, less molten iron with a high comprehensive heat is combined with more scrap steel, which can not only reach the end-point temperature of the converter but also avoid wasting heat.

[0042] In some embodiments, when the comprehensive heat is less than the first preset value and greater than the second preset value, the iron-receiving amount of the iron-receiving container is equal to the set amount.

[0043] The comprehensive heat of the molten iron is between the first preset value and the second preset value, that is to say, the comprehensive heat of the molten iron is neither particularly high nor particularly low. At this time, there is no need to adjust the amount of tapped iron, and the iron is directly tapped according to the set amount.

[0044] In some embodiments, in step S1, the comprehensive heat of the molten iron in the iron-receiving container can be obtained by the following means, specifically including:

[0045] S11. Measure the temperature and silicon content of the molten iron in the iron-receiving container;

[0046] S12. Determine the comprehensive heat T of the molten iron in the iron-receiving container according to T = a×Tz + b×Si + c; where a, b, and c are all constants, and their values are 1, 250, and -30 respectively, Tz is the temperature of the molten iron, and Si is the silicon content of the molten iron.

[0047] The comprehensive heat of hot metal mainly comes from two aspects. One is the high-temperature heat of the hot metal itself during blast furnace smelting, and the other is that there is a large amount of Si in the hot metal. The Si in the hot metal will fluctuate greatly due to different iron-making raw materials, and the silicon element will oxidize and release heat during converter smelting. Therefore, the comprehensive heat of hot metal can be measured by the temperature of the hot metal and the silicon content in the hot metal, and the accuracy of the calculated comprehensive heat is higher.

[0048] In some embodiments, the comprehensive heat of hot metal can also only consider the temperature, that is, directly judge the comprehensive heat of hot metal through the temperature Tz of the hot metal. In other embodiments, the comprehensive heat of hot metal can also only consider the Si content of the hot metal, and this application does not make more restrictions.

[0049] The temperature of the hot metal can be measured by a thermocouple, and the silicon content can be obtained by detecting the composition after taking a hot metal sample with a sampler.

[0050] In some embodiments, when the amount of hot metal in the iron-receiving container is 50% - 70% of the set amount, measure the temperature and silicon content of the hot metal in the iron-receiving container.

[0051] The hot metal in the iron-receiving container increases from less to more. When the hot metal is less, the temperature drop rate of the hot metal is larger, and compared with the later-introduced hot metal, the hot metal that enters the iron-receiving container first stays longer and has a lower temperature. Therefore, the temperature measured for the hot metal that enters the iron-receiving container in the early stage will be on the low side, and using it as data for calculating the comprehensive heat will affect the accuracy of the result.

[0052] The amount of hot metal in the iron-receiving container needs to determine the iron-receiving amount according to the calculated comprehensive heat, that is, the amount of tapped iron in the iron-receiving container this time is not known before the calculation result comes out, that is, the end time of tapping cannot be determined, and even less can the measurement time of the hot metal temperature be determined according to the end time.

[0053] Whether the comprehensive heat of the hot metal is higher than the first preset value or the comprehensive heat of the hot metal is lower than the second preset value, the tapping amount is not less than 80% of the set value. Therefore, the time when the amount of hot metal in the iron-receiving container is 50% - 70% of the set amount can be used as the timing for temperature measurement and sampling. When the amount of hot metal is 50% - 70% of the set amount, the temperature of the hot metal in the iron-receiving container is closer to the temperature of the hot metal in the entire iron-receiving container at the end of tapping, and the accuracy of the temperature detection result is higher. In some embodiments, the time when the amount of hot metal in the iron-receiving container is 60%, 65% or 68% of the set amount can be used as the timing for temperature measurement and sampling.

[0054] In some embodiments, the first preset value and the second preset value described above can be obtained through the following method:

[0055] S101. Obtain the historical temperature and historical silicon content of the multi-ladle hot metal charged into the steelmaking furnace;

[0056] S102. Calculate the heat of multiple heats of hot metal according to the historical temperature and historical silicon content;

[0057] S103. Sort the heat of the multiple heats of hot metal from large to small. Among them, the average value of the heat of the hot metal at the 5 - 12% position is the first preset value, and the average value of the heat of the hot metal at the last 5 - 12% position is the second preset value.

[0058] The steelmaking furnace can be a converter. Converter smelting requires the addition of hot metal and scrap steel. Using the historical heat of multiple heats of hot metal as the basic data for determining the first preset value and the second preset value, the calculation result has a high degree of coincidence and high accuracy with the calorific value of the hot metal smelted from the current raw materials. Removing the data at the first 8% and the last 8% can remove accidental or incorrect data and further improve the accuracy of the first preset value and the second preset value.

[0059] In some embodiments, the amount of hot metal received by the hot metal receiving container is less than the set amount, specifically: the amount of hot metal received by the hot metal receiving container is 90 - 98% of the set amount. That is to say, when the comprehensive heat of the hot metal in the hot metal receiving container is greater than the first preset value, control the hot metal receiving container to receive 90 - 98% of the set amount of hot metal, such as receiving 92%, 93% of the set amount of hot metal, etc.

[0060] In some embodiments, the amount of hot metal received by the hot metal receiving container is greater than the set amount, specifically: the amount of hot metal received by the hot metal receiving container is 102 - 110% of the set amount. That is to say, when the heat is less than the second preset value, control the hot metal receiving container to receive 102 - 110% of the set amount of hot metal, such as receiving 105%, 108% of the set amount of hot metal, etc.

[0061] In some embodiments, the amount of hot metal received by the hot metal receiving container is less than the set amount, specifically: the amount of hot metal received by the hot metal receiving container is 90 - 95% of the set amount.

[0062] In some embodiments, the amount of hot metal received by the hot metal receiving container is greater than the set amount, specifically: the amount of hot metal received by the hot metal receiving container is 105 - 110% of the set amount.

[0063] In some embodiments, the capacity of the hot metal receiving container is 50 - 400t.

[0064] In some embodiments, the hot metal receiving time of the hot metal receiving container is 10 - 60min.

[0065] The following further illustrates the hot metal tapping regulation method provided by the present application with specific embodiments.

[0066] Example 1

[0067] A steelmaking plant smelted 3,000 ladles of hot metal last month. The temperature of the hot metal entering the furnace for each heat was measured and sampled for chemical analysis. The comprehensive heat index per ton of hot metal for this ladle of hot metal was calculated as "hot metal temperature + 250 * Si content - 30". For example, if the hot metal temperature in a certain ladle of hot metal was 1,400 °C and the Si content was 0.3%, its comprehensive heat index per ton of hot metal was 1400 + 0.3×250 - 30 = 1445. The 3,000 results were sorted from largest to smallest, and the positive and negative 5% rankings (i.e., the 150th and 2,851st data) were rounded to obtain the critical values of 1,553 (the first preset value) and 1,381 (the second preset value).

[0068] The planned ladle charge (set value) for this month is 220 tons. During the actual production process, when the hot metal charge in each ladle reaches 150 tons, the hot metal in the ladle is sampled and the temperature is measured, and the comprehensive heat index per ton of hot metal is calculated. If the result is greater than 1,553, the hot metal receiving amount of the ladle is adjusted to 205 tons; if the result is less than 1,381, the hot metal receiving amount of the ladle is adjusted to 235 tons.

[0069] The total converter charge is 245t. When the hot metal receiving amount of the ladle is 205t, the corresponding scrap charge is 30t. When the hot metal receiving amount of the ladle is 235t, the corresponding scrap charge is 10t.

[0070] Example 2

[0071] A steelmaking plant smelted 3,000 ladles of hot metal last month. The temperature of the hot metal entering the furnace for each heat was measured and sampled for chemical analysis. The comprehensive heat index per ton of hot metal for this ladle of hot metal was calculated as "hot metal temperature + 250 * Si content - 30". For example, if the hot metal temperature in a certain ladle of hot metal was 1,420 °C and the Si content was 0.28%, its comprehensive heat index per ton of hot metal was 1420 + 0.28×250 - 30 = 1,460. The 3,000 results were sorted from largest to smallest, and the positive and negative 8% rankings (i.e., the 240th and 2,761st data) were rounded to obtain the critical values of 1,550 (the first preset value) and 1,383 (the second preset value).

[0072] The planned ladle charge (set value) for this month is 220 tons. During the actual production process, when the hot metal charge in each ladle reaches 145 tons, the hot metal in the ladle is sampled and the temperature is measured, and the comprehensive heat index per ton of hot metal is calculated. If the result is greater than 1,550, the hot metal receiving amount of the ladle is adjusted to 201 tons; if the result is less than 1,383, the hot metal receiving amount of the ladle is adjusted to 240 tons.

[0073] The total converter charge is 245t. When the hot metal receiving amount of the ladle is 201t, the corresponding scrap charge is 44t. When the hot metal receiving amount of the ladle is 240t, the corresponding scrap charge is 5t.

[0075] Example 3

[0076] Last month, a steelmaking plant smelted 3,000 hot metal ladles. The temperature of the hot metal entering each furnace was measured and sampled for chemical analysis. The comprehensive heat index per ton of hot metal for this ladle of hot metal was calculated as "hot metal temperature + 250 * Si content - 30". For example, if the hot metal temperature in a certain hot metal ladle was 1410 °C and the Si content was 0.33%, the comprehensive heat index per ton of hot metal was 1410 + 0.33 × 250 - 30 = 1463. The 3,000 results were sorted from largest to smallest, and the positive and negative 6% of the rankings (i.e., the 180th and 2821st data) were rounded to obtain the critical values, which were 1552 (the first preset value) and 1382 (the second preset value).

[0077] The planned ladle charge (set value) of hot metal this month is 220 tons. During the actual production process, when the hot metal charge in each hot metal ladle reaches 148 tons, the hot metal in the ladle is sampled and the temperature is measured, and the comprehensive heat index per ton of hot metal is calculated. If the result is greater than 1552, the hot metal receiving amount of the ladle is adjusted to 208 tons; if the result is less than 1383, the hot metal receiving amount of the ladle is adjusted to 230 tons.

[0078] The total charge of the converter is 245t. When the hot metal receiving amount of the hot metal ladle is 208t, the corresponding scrap charge is 27t; when the hot metal receiving amount of the hot metal ladle is 230t, the corresponding scrap charge is 15t.

[0079] The iron tapping control method provided by this application has at least the following advantages:

[0080] (1) By comparing the comprehensive heat of the current hot metal with the first preset value and the second preset value, the hot metal receiving amount of the receiving container is determined, and the hot metal amount is adjusted in advance during the hot metal receiving process of the hot metal container, avoiding the situation that after the hot metal reaches the steelmaking workshop, due to restrictions in aspects such as site, safety, and environmental protection, there are no conditions for adjusting the hot metal amount, and it can only be fully charged into the furnace for smelting, resulting in an unsatisfactory heat balance for some steelmaking furnace charges, and a large amount of expensive temperature raising agents or cooling agents are consumed additionally for remedy, bringing a series of problems such as increased production costs, decreased molten steel quality, extended smelting cycle, and imbalance in production organization.

[0081] (2) Using the temperature and composition of the existing hot metal in the receiving container to calculate the comprehensive heat of the current hot metal, the calculation result has high accuracy.

[0082] (3) Using the historical hot metal data of the converter to calculate the first preset value and the second preset value, it is more in line with the actual value of the current raw material smelted hot metal, and the calculation result has high accuracy.

[0083] (4) The heat input by the raw materials for each converter smelting is basically the same, with small fluctuations, improving the stability of converter production in the steelmaking process.

[0084] Although the preferred embodiments of the present application have been described, those of ordinary skill in the art can make additional changes and modifications to these embodiments once they learn the basic creative concept. Therefore, the appended claims are intended to be construed as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0085] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

1. A method for regulating iron tapping of an iron smelting furnace, characterized in that, It includes the following steps: During the process of receiving hot metal from a blast furnace in a ladle, obtain the comprehensive heat of the hot metal in the ladle; When the comprehensive heat is greater than a first preset value, the ladling amount of the ladle is not higher than the set amount; when the comprehensive heat is less than a second preset value, the ladling amount of the ladle is greater than the set amount; wherein, the first preset value is greater than the second preset value; Control the ladle to receive the ladling amount of hot metal.

2. The iron tapping regulation method for a blast furnace according to claim 1, wherein When the comprehensive heat is greater than the first preset value, the ladling amount of the ladle is less than the set amount; when the comprehensive heat is less than the first preset value and greater than the second preset value, the ladling amount of the ladle is equal to the set amount.

3. The iron tapping regulation method for a blast furnace according to claim 1, characterized in that, The obtaining of the comprehensive heat of the hot metal in the ladle specifically includes: Measure the temperature and silicon content of the hot metal in the ladle; According to T = a×Tz + b×Si + c, determine the comprehensive heat T of the hot metal in the ladle; where a, b, and c are all constants, with values of 1, 250, and -30 respectively, Tz is the temperature of the hot metal, and Si is the silicon content in the hot metal.

4. The iron tapping regulation method of the iron smelting furnace according to claim 3, characterized in that, When the amount of hot metal in the ladle is 50% - 70% of the set amount, measure the temperature and silicon content of the hot metal in the ladle.

5. The method for controlling the tapping of the iron-making furnace according to any one of claims 1-4, characterized in that, The first preset value and the second preset value are obtained through the following method: Obtain the historical temperature and historical silicon content of the multiple heats of hot metal charged into the steelmaking furnace; Calculate the heat of the multiple heats of hot metal according to the historical temperature and historical silicon content; Sort the heats of the multiple heats of hot metal from large to small. Among them, the average heat of the hot metal at the 5 - 12% position from the front is the first preset value, and the average heat of the hot metal at the 5 - 12% position from the back is the second preset value.

6. The iron tapping regulation method for a blast furnace according to any one of claims 1 to 4, characterized in that, The ladling amount of the ladle being less than the set amount specifically means: the ladling amount of the ladle is 80 - 95% of the set amount.

7. The iron tapping regulation method for a blast furnace according to claim 6, characterized in that, The ladling amount of the ladle being greater than the set amount specifically means: the ladling amount of the ladle is 105 - 120% of the set amount.

8. The iron tapping regulation method of the blast furnace according to claim 7, characterized in that, The ladling amount of the ladle being less than the set amount specifically means: the ladling amount of the ladle is 90 - 98% of the set amount; the ladling amount of the ladle being greater than the set amount specifically means: the ladling amount of the ladle is 102 - 110% of the set amount.

9. The iron tapping regulation method of the blast furnace according to any one of claims 1-4, characterized in that, The capacity of the ladle is 50 - 400t.

10. The iron tapping regulation method of the blast furnace according to claim 8, characterized in that, The ladling time of the ladle is 10 - 60min.

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