Converter, converter smelting control method, device, equipment and readable storage medium

Abstract

The embodiment of the present invention provides a converter, converter smelting control method, device, equipment and readable storage medium. First, the changes in the auxiliary raw materials, scrap steel, molten iron and furnace conditions in the converter in the current cycle are obtained, and then the feeding amount, feeding time and oxygen lance position information of the auxiliary raw materials in the next cycle are determined based on the changes in the auxiliary raw materials, scrap steel, molten iron and furnace conditions in the current cycle. Finally, the feeding amount, feeding time and oxygen lance position information of the auxiliary raw materials are used to control the converter smelting process in the next cycle. By continuously monitoring the auxiliary raw materials, scrap steel, molten iron and furnace conditions, once the auxiliary raw materials, scrap steel, molten iron and furnace conditions in the current cycle are abnormal, the auxiliary raw materials, scrap steel, molten iron and furnace conditions in the next cycle will be reasonably improved, which can make the converter smelting process have a better dephosphorization effect, increase the stability of the converter smelting operation process, and also improve the quality of the smelted finished molten steel.

Description

Technical Field

[0001] The present invention relates to the field of smelting technology, and in particular to a converter, a converter smelting control method, a device, equipment and a readable storage medium. Background Art

[0002] Currently, demands for steel's performance are increasingly stringent, and the phosphorus content in steel directly impacts its properties. Phosphorus in steel can cause cold brittleness and is a harmful element in steel. Generally, the lower the phosphorus content, the better. Phosphorus in steel is primarily removed during the converter smelting process. The converter has a high dephosphorization efficiency, theoretically removing approximately 90% of the phosphorus in steel. The conditions for converter dephosphorization are: moderately low temperatures, high basicity, high oxidizing properties, and a large slag volume.

[0003] Generally speaking, the dephosphorization conditions can be met when the molten iron, scrap steel, auxiliary raw materials, furnace conditions are normal and the smelting process is in good working order. However, quality accidents often occur in finished steel products with excessive phosphorus content. This is mainly caused by untimely operation adjustments under abnormal smelting conditions. At present, the abnormal smelting conditions that lead to high phosphorus content in steel when it comes out of the converter mainly include: (1) fluctuations in the quality of the auxiliary raw material white ash, such as raw burning of white ash or serious pulverization of white ash; (2) changes in iron consumption, such as low iron consumption and high scrap ratio, high iron consumption and low scrap ratio; (3) large changes in molten iron composition, such as high silicon molten iron smelting, low silicon molten iron smelting, and high phosphorus molten iron smelting; (4) the first furnace after the furnace is replenished, and the first furnace with a long empty furnace time.

[0004] Under abnormal smelting conditions, if the smelting operation methods under normal smelting conditions are used for control, it is easy to have poor slag slagging, low basicity, poor fluidity, poor dephosphorization effect and other phenomena, which makes it difficult to achieve the dephosphorization standard in the steel smelting process. Summary of the Invention

[0005] The embodiments of the present invention solve the technical problems of poor dephosphorization effect and untimely dephosphorization in the converter in the prior art by providing a converter, a converter smelting control method, a device, an equipment and a readable storage medium.

[0006] In the first aspect, the present invention provides a converter smelting control method through an embodiment of the present invention, including: obtaining changes in auxiliary raw materials, scrap steel, molten iron and furnace conditions in the converter during the current cycle; determining the feeding amount, feeding time and oxygen lance position information of the auxiliary raw materials in the next cycle based on the changes in the auxiliary raw materials, the scrap steel, the molten iron and the furnace conditions during the current cycle; and controlling the converter smelting process in the next cycle using the feeding amount, feeding time and oxygen lance position information of the auxiliary raw materials.

[0007] Optionally, determining the feeding amount, feeding time and oxygen lance position information of the auxiliary raw material in the next cycle according to changes in the auxiliary raw material, the scrap steel, the molten iron and the furnace condition in the current cycle includes: determining the feeding amount, feeding time and oxygen lance position information of the auxiliary raw material in the next cycle according to changes in the auxiliary raw material in the current cycle;

[0008] The auxiliary raw materials include lime, ore, and limestone. If the limestone content in the lime is detected to be greater than a first preset threshold value in the current cycle, lime is added based on a first incremental threshold value at the early stage of blowing in the next cycle, while ore and limestone are not added. The oxygen lance position is increased based on a second incremental threshold value, and the addition time is determined based on the actual oxygen blowing percentage.

[0009] If it is detected in the current cycle that the pulverization ratio of the white ash is greater than the second preset threshold, then in the early stage of blowing in the next cycle, white ash is added based on the first incremental threshold, ore is added based on the third preset threshold, the oxygen lance position is increased based on the second incremental threshold, and the feeding time is determined based on the actual oxygen blowing percentage.

[0010] Optionally, determining the feeding amount, feeding time and oxygen lance position information of the auxiliary raw material in the next cycle according to changes in the auxiliary raw material, the scrap steel, the molten iron and the furnace condition in the current cycle includes: determining the feeding amount, feeding time and oxygen lance position information of the auxiliary raw material in the next cycle according to changes in the scrap steel in the current cycle;

[0011] The auxiliary raw material further includes light-burned dolomite. If the proportion of scrap steel detected in the current cycle is greater than a fourth preset threshold, light-burned dolomite and lime are added at the early stage of blowing in the next cycle based on a first proportion threshold, the oxygen lance position is lowered based on a first reduction threshold, and the addition time is determined based on an actual oxygen blowing percentage.

[0012] If it is detected in the current cycle that the proportion of scrap steel is less than the fifth preset threshold, then in the early stage of blowing in the next cycle, light-burned dolomite and lime are added based on the first proportion threshold, limestone is added based on the second incremental threshold, and the adding time is determined based on the actual oxygen blowing percentage.

[0013] Optionally, determining the feeding amount, feeding time and oxygen lance position information of the auxiliary raw material in the next cycle according to changes in the auxiliary raw material, the scrap steel, the molten iron and the furnace condition in the current cycle includes: determining the feeding amount, feeding time and oxygen lance position information of the auxiliary raw material in the next cycle according to changes in the molten iron in the current cycle;

[0014] If the silicon content in the molten iron is detected to be greater than a sixth preset threshold value during the current cycle, the silicon oxide content is controlled within a target requirement within a preset oxygen blowing percentage range using a double slag method during the early blowing period of the next cycle, limestone is added based on a second incremental threshold value, and the addition time is determined based on the actual oxygen blowing percentage.

[0015] If the proportion of silicon in the molten iron is detected to be less than a seventh preset threshold value in the current cycle, then in the next cycle, the amount of slag is increased based on the third incremental threshold value at the early stage of blowing, ore is added based on actual slagging conditions, and the feeding time is determined based on an actual oxygen blowing percentage;

[0016] If it is detected in the current cycle that the proportion of phosphorus in the molten iron is greater than the eighth preset threshold value, then in the early stage of blowing in the next cycle, the double slag method is used to control the phosphorus oxide content within the target requirement within the preset oxygen blowing percentage range, limestone is added based on the second incremental threshold value, and the feeding time is determined based on the actual oxygen blowing percentage.

[0017] Optionally, determining the feeding amount, feeding time and oxygen lance position information of the auxiliary raw material in the next cycle according to changes in the auxiliary raw material, the scrap steel, the molten iron and the furnace condition in the current cycle includes: determining the feeding amount, feeding time and oxygen lance position information of the auxiliary raw material in the next cycle according to changes in the furnace condition in the current cycle;

[0018] Among them, if it is detected that the idle time of the converter is greater than the ninth preset threshold value in the current cycle, or it is detected that the converter completes the furnace replenishment operation in the current cycle, then in the early stage of blowing in the next cycle, light-burned dolomite is added based on the second reduction threshold value, the oxygen lance position is increased based on the second increment threshold value, and the feeding time is determined based on the actual oxygen blowing percentage.

[0019] Optionally, the method also includes: if it is detected in the current cycle that the auxiliary raw materials, the scrap steel, the molten iron and the furnace condition are all in normal changes in the current cycle, then in the next cycle, lime, light-burned dolomite, ore and limestone are added based on preset standard proportions, the oxygen gun position is controlled based on a preset standard gun position, and the feeding time is determined based on the actual oxygen blowing percentage.

[0020] In a second aspect, the present invention provides a converter smelting control device according to an embodiment of the present invention, comprising:

[0021] The data acquisition unit is used to obtain the changes in auxiliary raw materials, scrap steel, molten iron and furnace conditions in the converter during the current cycle;

[0022] a data processing unit, configured to determine, based on changes in the auxiliary raw materials, the scrap steel, the molten iron, and the furnace conditions in the current cycle, the amount and time of adding the auxiliary raw materials and information on the oxygen lance position in the next cycle;

[0023] The control unit is used to control the converter smelting process in the next cycle by using the feeding amount and feeding time of the auxiliary raw materials and the oxygen lance position information.

[0024] In a third aspect, the present invention provides a converter smelting control device through an embodiment of the present invention, comprising a memory, a processor, and a code stored in the memory and executable on the processor, wherein when the processor executes the code, any one of the implementations in the first aspect is implemented.

[0025] In a fourth aspect, the present invention provides a converter through an embodiment of the present invention, comprising the converter smelting control device described in the third aspect.

[0026] In a fifth aspect, the present invention provides a computer-readable storage medium through an embodiment of the present invention, on which a computer program is stored, and when the computer program is executed by a processor, any implementation method in the first aspect is implemented.

[0027] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0028] First, the changes in the auxiliary raw materials, scrap steel, molten iron, and furnace conditions in the converter during the current cycle are obtained. Then, based on the changes in the auxiliary raw materials, scrap steel, molten iron, and furnace conditions during the current cycle, the auxiliary raw material addition amount, addition time, and oxygen lance position information for the next cycle are determined. Finally, the auxiliary raw material addition amount, addition time, and oxygen lance position information are used to control the converter smelting process during the next cycle. By continuously monitoring the auxiliary raw materials, scrap steel, molten iron, and furnace conditions, if any abnormalities occur in the auxiliary raw materials, scrap steel, molten iron, and furnace conditions during the current cycle, the auxiliary raw materials, scrap steel, molten iron, and furnace conditions for the next cycle will be reasonably improved. This can achieve a better dephosphorization effect in the converter smelting process, increase the stability of the converter smelting operation process, and improve the quality of the smelted steel product. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1Flowchart of the converter smelting control method in an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram showing the control of the lance height of the oxygen blowing lance according to the oxygen blowing percentage in the first embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram showing the control of the lance height of the lower oxygen blowing lance according to the second embodiment of the present invention as a function of the oxygen blowing percentage;

[0033] Figure 4 Schematic diagram of controlling the lance height of the bottom-blowing oxygen lance according to the oxygen blowing percentage in the third embodiment of the present invention;

[0034] Figure 5 Schematic diagram of controlling the lance height of the bottom-blowing oxygen lance according to the oxygen blowing percentage in the fourth embodiment of the present invention;

[0035] Figure 6 Schematic diagram of controlling the lance height of the downward blowing oxygen lance according to the oxygen blowing percentage in the fifth embodiment of the present invention;

[0036] Figure 7 Schematic diagram of controlling the lance height of the downward oxygen blowing lance according to the oxygen blowing percentage in the sixth embodiment of the present invention;

[0037] Figure 8 Schematic diagram of controlling the lance height of the downward blowing oxygen refining lance according to the seventh implementation mode in the embodiment of the present invention;

[0038] Figure 9 Schematic diagram of controlling the lance height of the downward blowing oxygen refining lance according to the oxygen blowing percentage in the eighth embodiment of the present invention;

[0039] Figure 10 Schematic diagram of controlling the lance height of the bottom-blowing oxygen refining lance according to the oxygen blowing percentage in the ninth embodiment of the present invention;

[0040] Figure 11 Schematic diagram of the structure of a converter smelting control device in an embodiment of the present invention;

[0041] Figure 12 Schematic diagram of the structure of converter smelting control equipment in an embodiment of the present invention;

[0042] Figure 13 Schematic diagram of a computer-readable storage medium structure in an embodiment of the present invention. DETAILED DESCRIPTION

[0043] The embodiments of the present invention solve the technical problems of poor dephosphorization effect and untimely dephosphorization in the converter in the prior art by providing a converter, a converter smelting control method, a device, an equipment and a readable storage medium.

[0044] The technical solution provided by the embodiments of the present invention is to solve the above technical problems, and the overall idea is as follows:

[0045] First, the changes in auxiliary raw materials, scrap steel, molten iron and furnace conditions in the converter during the current cycle are obtained. Then, based on the changes in auxiliary raw materials, scrap steel, molten iron and furnace conditions during the current cycle, the feeding amount, feeding time and oxygen lance position information of the auxiliary raw materials in the next cycle are determined. Finally, the feeding amount, feeding time and oxygen lance position information of the auxiliary raw materials are used to control the converter smelting process in the next cycle.

[0046] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0047] First, the term "and / or" as used herein simply describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A alone, A and B together, or B alone. Furthermore, the character " / " in this document generally indicates an "or" relationship between the associated objects.

[0048] It should be noted that the terms "first," "second," and the like in the specification and claims of the present invention and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present invention described herein can be implemented in an order other than that illustrated or described herein.

[0049] In the first aspect, the present invention provides a converter smelting control method through an embodiment of the present invention, which is applied to the converter smelting process, and is specifically applied to the dephosphorization process of the converter smelting. Figure 1 As shown, the converter smelting control method may include the following steps:

[0050] Step S101: Obtain changes in auxiliary raw materials, scrap steel, molten iron, and furnace conditions in the converter during the current cycle.

[0051] Specifically, the ICP analysis method can be used to obtain the changes in the auxiliary raw materials, scrap steel and molten iron in the converter, or the laser induced breakdown spectroscopy analyzer can be used to analyze the changes in the auxiliary raw materials, scrap steel and molten iron in the converter.

[0052] Step S102: Determine the amount of auxiliary raw materials, feeding time and oxygen lance position information for the next cycle based on the changes in auxiliary raw materials, scrap steel, molten iron and furnace conditions in the current cycle.

[0053] Specifically, step S102 may include any one or more of the following steps A1 to A4:

[0054] A1. According to the changes of auxiliary raw materials in the current cycle, the feeding amount, feeding time and oxygen lance position information of the auxiliary raw materials in the next cycle are determined.

[0055] The auxiliary raw materials may include lime, ore, and limestone. If the limestone content in the lime is detected to be greater than a first preset threshold in the current cycle, lime is added based on the first incremental threshold at the beginning of the blowing process in the next cycle, while ore and limestone are not added. The oxygen lance position is raised based on the second incremental threshold, and the addition time is determined based on the actual oxygen blowing percentage.

[0056] In the specific implementation process, if it is detected in the current cycle that the limestone content in the white ash in the converter is greater than the first preset threshold, it indicates that the white ash contains a large amount of unburned limestone, and white ash needs to be added based on the first incremental threshold in the next cycle.

[0057] The first incremental threshold can be set according to the capacity of the converter. In an optional embodiment, the first incremental threshold can be any value between 1 and 2 tons. The first preset threshold can be set according to the actual application scenario. In an optional embodiment, the first preset threshold can be any value between 0.6 and 0.8. The second incremental threshold can be any value between 100 and 200 mm.

[0058] Furthermore, all the lime needs to be added in the early stages of blowing, and no ore or limestone is added in the early stages of blowing. Furthermore, the oxygen lance position can be raised 100-200mm compared to the normal position in the early stages of blowing to increase the ferrous oxide content in the slag, thereby accelerating the formation of limestone slag.

[0059] Then, in the middle stage of blowing, by appropriately extending the duration of the oxygen lance high position and adding an appropriate amount of ore, it is helpful to alleviate the "drying out" of the limestone slagging process. Finally, when the oxygen blowing percentage reaches 75%, the blowing oxygen lance can be restored to the normal position.

[0060] In an optional embodiment, the control of the lance height of the oxygen blowing lance with the oxygen blowing percentage can be referred to as follows Figure 2 As shown, the changes in the oxygen lance position height are: 260mm-240mm-220mm-200mm-180mm-160mm.

[0061] In an optional embodiment, according to the change of the auxiliary raw material in the current cycle, the addition amount and addition time of the auxiliary raw material in the next cycle can be determined as shown in Table 1 below.

[0062] Table 1. Auxiliary raw material addition amount and addition time determined according to the change of auxiliary raw materials in one embodiment

[0063]

[0064] If the powdering ratio of white ash detected in the current cycle is greater than the second preset threshold, white ash is added based on the first incremental threshold, ore is added based on the third preset threshold, the oxygen lance position is increased based on the second incremental threshold, and the feeding time is determined based on the actual oxygen blowing percentage in the early stage of blowing in the next cycle.

[0065] During the specific implementation process, if it is detected that the powdered proportion of white ash in the converter is greater than the second preset threshold in the current cycle, it indicates that there is a lot of white ash powder in the current cycle, and the loss of white ash with a lot of powder will increase after being added to the converter. In the next cycle, white ash needs to be added based on the first incremental threshold.

[0066] The second preset threshold can be set according to the actual application scenario. In an optional embodiment, the second preset threshold can be any value between 0.6 and 0.8. The third preset threshold can be set according to the capacity of the converter. In an optional embodiment, the third preset threshold can be any value between 0.5 and 1 ton.

[0067] Furthermore, all the lime needs to be added in the early stages of blowing to reduce fan losses caused by the batch addition of pulverized lime. Furthermore, the oxygen lance should be positioned 100-200mm higher than normal during the early stages of blowing. An appropriate amount of ore should be added in the early stages of blowing to increase the ferrous oxide content in the slag, thereby accelerating the melting of the lime into slag.

[0068] After the white ash slag is melted, the oxygen lance position should be lowered in time, and the stirring of the molten pool should be strengthened to accelerate the dephosphorization reaction in the molten pool. In the middle stage of blowing, the oxygen lance position should be raised and an appropriate amount of ore should be added to prevent the slag from "drying out". Finally, when the oxygen blowing percentage reaches 75%, the oxygen lance position can be restored to the normal position.

[0069] In an optional embodiment, the control of the lance height of the oxygen blowing lance with the oxygen blowing percentage can be referred to as follows Figure 3 As shown, the changes in the oxygen lance position height are: 260mm-240mm-260mm-240mm-220mm-200mm-180mm-160mm.

[0070] In another optional embodiment, according to the change of the auxiliary raw material in the current cycle, the addition amount and addition time of the auxiliary raw material in the next cycle can be determined as shown in Table 2 below.

[0071] Table 2. Auxiliary raw material addition amount and addition time determined according to the change of auxiliary raw materials under another embodiment

[0072]

[0073] A2. According to the changes in scrap steel in the current cycle, determine the feeding amount, feeding time and oxygen lance position information of the auxiliary raw materials in the next cycle.

[0074] The auxiliary raw material may also include light-burned dolomite. If the proportion of scrap steel detected in the current cycle exceeds a fourth preset threshold, light-burned dolomite and lime are added at the beginning of the blowing process in the next cycle based on the first ratio threshold, the oxygen lance position is lowered based on the first reduction threshold, and the addition time is determined based on the actual oxygen blowing percentage.

[0075] During the specific implementation process, if it is detected that the iron consumption in the converter is low in the current cycle and the proportion of scrap steel is greater than the fourth preset threshold, it indicates that the scrap steel in the converter in the current cycle is relatively large. In the next cycle, the amount of scrap steel added is increased in the early stage of blowing, and light-burned dolomite and lime are added based on the first proportion threshold. The oxygen lance position is lowered based on the first reduction threshold, and the scrap steel is "stirred" to promote the melting of the scrap steel, avoiding the occurrence of a "dead zone" and indirectly causing slow melting of the scrap steel and low terminal temperature in the converter.

[0076] The fourth preset threshold value can be set according to the actual application scenario. In an optional embodiment, the fourth preset threshold value can be any value between 0.6 and 0.8. The first ratio threshold value can be set according to the actual application scenario. In an optional embodiment, the first ratio threshold value can be any value between 0.9 and 1.1. The first decrement threshold value can be set according to the actual application scenario. In an optional embodiment, the first decrement threshold value can be any value between 100 and 200 mm.

[0077] Next, add the first batch of auxiliary raw materials after the oxygen lance is at the low position for 60-90 seconds. This allows the molten pool in the converter to reach a certain temperature before adding the auxiliary raw materials, which is more conducive to slagging in the early stage of converter blowing. The auxiliary raw materials can be added in batches, small amounts, and frequently to ensure that the temperature in the converter rises evenly and the auxiliary raw materials can be melted more fully as they are added to the converter.

[0078] At the same time, lightly calcined dolomite is added to the first batch of auxiliary raw materials, as magnesium oxide promotes the melting of the auxiliary raw materials and helps them form slag, thereby ensuring dephosphorization in the early stages of blowing. After the slag in the early stages of blowing is completely dissolved, the second batch of auxiliary raw materials is added. At the same time, the molten pool temperature continues to rise evenly, and the oxygen lance is raised to its normal position to increase the ferrous oxide content in the slag, thereby accelerating the melting of the lime.

[0079] After the slag in the converter is fully slaged, the oxygen lance position is promptly lowered and the stirring of the molten pool is increased to promote the dephosphorization reaction in the converter. In the middle of the blowing process, the oxygen lance position is raised to increase the ferrous oxide content in the slag and prevent the slag from "drying out". Finally, when the oxygen blowing percentage reaches 75%, the blowing oxygen lance can be returned to the normal position.

[0080] In an optional embodiment, the control of the lance height of the oxygen blowing lance with the oxygen blowing percentage can be referred to as follows Figure 4 As shown, the changes in the oxygen lance position height are: 220mm-240mm-220mm-240mm-220mm-200mm-180mm-160mm.

[0081] In an optional embodiment, according to the change of scrap steel in the current cycle, the feeding amount and feeding time of the auxiliary raw material in the next cycle can be determined as shown in Table 3 below.

[0082] Table 3. Auxiliary raw material feeding amount and feeding time determined according to the change of scrap steel under one embodiment

[0083]

[0084]

[0085] If it is detected in the current cycle that the proportion of scrap steel is less than the fifth preset threshold, then in the early stage of blowing in the next cycle, light-burned dolomite and lime are added based on the first proportion threshold, limestone is added based on the second incremental threshold, and the addition time is determined based on the actual oxygen blowing percentage.

[0086] In practice, if high iron consumption in the converter is detected during the current cycle, and the scrap ratio is below a fifth preset threshold, this indicates that the scrap content in the converter is relatively low, the molten iron content is high, and there is sufficient heat. Limestone can be used in place of lime in the early stages of blowing in the next cycle to balance heat and reduce lime consumption.

[0087] The fifth preset threshold value may be set according to actual application scenarios. In an optional implementation, the fifth preset threshold value may be any value between 0.2 and 0.5.

[0088] Limestone is added completely in the early stages of blowing, and no ore is added. After the addition of auxiliary raw materials is complete, the oxygen lance position is promptly lowered to inhibit limestone decomposition and prevent low-temperature slag overflow caused by limestone decomposition. By increasing the agitation of the molten pool, the dephosphorization reaction at low temperatures in the early stages of blowing is enhanced. Once the descaling reaction stabilizes, the oxygen lance position is raised to increase the ferrous oxide content in the slag, accelerating the dissolution of the limestone into slag. The oxygen lance is kept at the high position for an appropriate period of time in the middle stages of blowing, and an appropriate amount of ore is added to mitigate the "dry-out" phenomenon that occurs after limestone slagging. When the oxygen percentage reaches 75%, the oxygen lance can be returned to its normal position.

[0089] In an optional embodiment, the control of the lance height of the oxygen blowing lance with the oxygen blowing percentage can be referred to as follows Figure 5 As shown, the changes in the oxygen lance position height are: 240mm-220mm-240mm-220mm-200mm-180mm-160mm.

[0090] In another optional embodiment, according to the change of scrap steel in the current cycle, the feeding amount and feeding time of the auxiliary raw material in the next cycle can be determined as shown in Table 4 below.

[0091] Table 4. Auxiliary raw material feeding amount and feeding time determined according to the change of scrap steel under another embodiment

[0092]

[0093] A3. According to the changes of molten iron in the current cycle, determine the feeding amount, feeding time and oxygen lance position information of the auxiliary raw materials in the next cycle.

[0094] Among them, if it is detected in the current cycle that the silicon content in the molten iron is greater than the sixth preset threshold, the double slag method is used in the early stage of blowing in the next cycle to control the silicon oxide content within the preset oxygen blowing percentage range to be within the target requirement, limestone is added based on the second incremental threshold, and the feeding time is determined based on the actual oxygen blowing percentage.

[0095] During the specific implementation process, if it is detected that the silicon content in the molten iron in the converter is greater than the sixth preset threshold value in the current cycle, it indicates that the molten iron in the converter is high-silicon molten iron. Since a large amount of silicon in the high-silicon molten iron will be oxidized in the early stage of blowing, the temperature in the converter rises rapidly, and the silicon dioxide content in the slag is high, resulting in low slag alkalinity and ferrous oxide content, which is not conducive to dephosphorization.

[0096] The sixth preset threshold value can be set according to the actual application scenario. In an optional embodiment, the sixth preset threshold value can be any value between 0.5% and 0.7%. The preset oxygen blowing percentage range can be set according to the actual application scenario. In an optional embodiment, the preset oxygen blowing percentage range can be any value between 25% and 30%.

[0097] For example, when it is detected that the silicon content in the molten iron is greater than or equal to 0.6%, the double slag method can be adopted, that is, the amount of the first batch of auxiliary raw materials added accounts for about half of the total amount of auxiliary raw materials added. When the oxygen blowing percentage is between 25% and 30%, half of the slag rich in silica and silicon oxide in the early stage of blowing is poured out to control the silicon oxide content within the target requirements.

[0098] Next, secondary slagging is performed to lower the slag temperature and increase the slag basicity. In the middle stage of blowing, the oxygen lance position is raised to increase the ferrous oxide content in the slag, thereby accelerating the melting rate of lime added after the double slag treatment, thereby increasing the oxidizability of the slag and facilitating dephosphorization in the middle and late stages of blowing.

[0099] In an optional embodiment, the control of the lance height of the oxygen blowing lance with the oxygen blowing percentage can be referred to as follows Figure 6 As shown, the changes in the oxygen lance position height are: 240mm-220mm-240mm-220mm-200mm-180mm-160mm.

[0100] In a first optional implementation, according to the change of molten iron in the current cycle, the feeding amount and feeding time of auxiliary raw materials in the next cycle can be determined as shown in Table 5 below.

[0101] Table 5. Amount and time of auxiliary raw materials added according to the change of molten iron under the first embodiment

[0102]

[0103] If the proportion of silicon in the molten iron is detected to be less than the seventh preset threshold in the current cycle, the slag amount is increased based on the third incremental threshold in the early stage of blowing in the next cycle, ore is added based on the actual slagging situation, and the feeding time is determined based on the actual oxygen blowing percentage.

[0104] During the specific implementation process, if it is detected that the silicon content in the molten iron in the converter is less than the seventh preset threshold value in the current cycle, it indicates that the molten iron in the converter is low-silicon molten iron. Low-silicon molten iron will cause low furnace temperature, opaque slag and small amount of slag in the early stage of blowing, all of which are not conducive to dephosphorization.

[0105] The seventh preset threshold value can be set according to the actual application scenario. In an optional embodiment, the seventh preset threshold value can be any value between 0.1% and 0.2%. The third incremental threshold value can be set according to the actual application scenario. In an optional embodiment, the third incremental threshold value can be any value between 0.5 and 1 ton.

[0106] For example, when it is detected that the silicon content in the molten iron is less than or equal to 0.20%, the slag retention operation can be adopted and the amount of scrap steel can be adjusted in time, that is, a part of the slag from the previous converter can be retained and provided to the next converter. This can increase the amount of slag in the converter and increase the content of ferrous oxide in the slag in the early stage of blowing, which is beneficial to dephosphorization.

[0107] Then, in the middle stage of blowing, the oxygen lance position is raised to ensure that the slag contains a certain amount of ferrous oxide. At the same time, a certain amount of ore is added according to the actual slag formation situation to make the slag have better fluidity, thereby utilizing the high content of ferrous oxide and low temperature to achieve the effect of dephosphorization.

[0108] In an optional embodiment, the control of the lance height of the oxygen blowing lance with the oxygen blowing percentage can be referred to as follows Figure 7 As shown, the changes in the oxygen lance position height are: 250mm-230mm-250mm-230mm-210mm-190mm-160mm.

[0109] In a second optional implementation, according to the change of molten iron in the current cycle, the feeding amount and feeding time of auxiliary raw materials in the next cycle can be determined as shown in Table 6 below.

[0110] Table 6. Amount and time of auxiliary raw materials added according to the change of molten iron under the second embodiment

[0111]

[0112] If the proportion of phosphorus in the molten iron is detected to be greater than the eighth preset threshold value in the current cycle, the double slag method is used to control the phosphorus oxide content within the target requirement within the preset oxygen blowing percentage range in the early stage of blowing in the next cycle, limestone is added based on the second incremental threshold value, and the feeding time is determined based on the actual oxygen blowing percentage.

[0113] During the specific implementation process, if it is detected in the current cycle that the phosphorus proportion in the molten iron in the converter is greater than the eighth preset threshold, it indicates that the molten iron in the converter is high-phosphorus molten iron.

[0114] The eighth preset threshold value can be set according to the actual application scenario. In an optional embodiment, the eighth preset threshold value can be any value between 0.1% and 0.14%. The preset oxygen blowing percentage range can be set according to the actual application scenario. In an optional embodiment, the preset oxygen blowing percentage range can be any value between 25% and 30%.

[0115] For example, when the phosphorus content in molten iron is detected to be greater than or equal to 0.1%, and the smelting steel grade needs to control the phosphorus content at 0.015% or below, the double slag method can be used, that is, the amount of auxiliary raw materials added in the first batch accounts for about half of the total auxiliary raw materials added. When the oxygen blowing percentage is between 25% and 30%, half of the slag rich in phosphorus pentoxide in the early stage of blowing is poured out to control the phosphorus oxide content within the target requirements.

[0116] Next, secondary slagging is performed to improve the dephosphorization rate. The oxygen lance is positioned 100-200mm higher than normal during the initial blowing process to increase the foaming of the primary slag and facilitate slagging. During the secondary blowing process, lime and light-burned dolomite are added in batches to enhance slagging. In the middle of the blowing process, the oxygen lance position is raised to increase the ferrous oxide content in the slag, thereby accelerating the melting of the lime added after the double-slag process. This increases the oxidizability of the slag and facilitates dephosphorization in the middle and late stages of the blowing process.

[0117] In an optional embodiment, the control of the lance height of the oxygen blowing lance with the oxygen blowing percentage can be referred to as follows Figure 8 As shown, the changes in the oxygen lance position height are: 260mm-240mm-260mm-240mm-220mm-200mm-180mm-160mm.

[0118] In a third optional implementation, according to the change of molten iron in the current cycle, the feeding amount and feeding time of auxiliary raw materials in the next cycle can be determined as shown in Table 7 below.

[0119] Table 7. Amount of auxiliary raw materials and feeding time determined according to the changes in molten iron under the third embodiment

[0120]

[0121] A4. According to the changes in the furnace conditions in the current cycle, determine the amount of auxiliary raw materials to be added, the feeding time and the oxygen lance position information in the next cycle.

[0122] Among them, if it is detected that the idle time of the converter is greater than the ninth preset threshold value in the current cycle, or it is detected that the converter has completed the furnace replenishment operation in the current cycle, then in the early stage of blowing in the next cycle, light-burned dolomite is added based on the second reduction threshold value, the oxygen lance position is increased based on the second increment threshold value, and the feeding time is determined based on the actual oxygen blowing percentage.

[0123] In practice, the first batch of slag after a converter restocking process experiences significant changes in composition due to the large amount of restocking material added, making slag formation difficult. Furthermore, if the converter idle time exceeds the ninth preset threshold, the converter temperature drops, solidifying the slag layer on the lining and similarly hindering slag formation.

[0124] The ninth preset threshold value can be set according to the capacity of the converter. In an optional embodiment, the ninth preset threshold value can be any value between 12 and 24 hours. The second reduction threshold value can be set according to the capacity of the converter. In an optional embodiment, the second reduction threshold value can be any value between 0.5 and 1 ton.

[0125] Whether the converter is idle for too long or the converter has completed a reheating operation, it is very likely to cause the phosphorus content at the end of the converter smelting to be too high. For example, by reducing the amount of light-burned dolomite added, for example, by 1 ton compared to the normal heat, increasing the amount of ore added, and raising the oxygen lance position by 100-200mm when starting to blow, the magnesium oxide content in the slag can be effectively reduced, and the fluidity and oxidizability of the slag can be improved.

[0126] By reducing the amount of scrap steel added and adjusting the slagging temperature in the early stage of blowing, the slagging process can be promoted. The oxygen lance position can be increased in the middle stage of blowing to ensure that the slag contains a certain amount of ferrous oxide. At the same time, a certain amount of ore is added according to the actual slagging situation to make the slag have better fluidity. The high content of ferrous oxide and low temperature are used to achieve the dephosphorization effect.

[0127] In an optional embodiment, the control of the lance height of the oxygen blowing lance with the oxygen blowing percentage can be referred to as follows Figure 9 As shown, the changes in the oxygen lance position height are: 250mm-230mm-250mm-230mm-210mm-190mm-170mm.

[0128] In an optional embodiment, according to the change of the furnace condition in the current cycle, the feeding amount and feeding time of the auxiliary raw materials in the next cycle can be determined as shown in Table 8 below.

[0129] Table 8. Auxiliary raw material feeding amount and feeding time determined according to furnace condition changes under one embodiment

[0130]

[0131]

[0132] As an optional implementation, if it is detected that the auxiliary raw materials, scrap steel, molten iron and furnace conditions are all in normal changes in the current cycle, then in the next cycle, lime, light-burned dolomite, ore and limestone can be added based on the preset standard proportions, the oxygen gun position can be controlled based on the preset standard gun position, and the feeding time can be determined based on the actual oxygen blowing percentage.

[0133] In this optional embodiment, the control of the lance height of the oxygen blowing lance with the oxygen blowing percentage can be referred to as follows Figure 10 As shown, the changes in the oxygen lance position height are: 240mm-220mm-200mm-180mm-160mm.

[0134] In an optional embodiment, based on the preset standard ratio and the preset standard gun position, the feeding amount and feeding time of the auxiliary raw material in the next cycle can be determined as shown in Table 9 below.

[0135] Table 9. Auxiliary raw material feeding amount and feeding time determined based on preset standard ratio and preset standard gun position in one embodiment

[0136]

[0137] Step S103: using the amount of auxiliary raw materials added, the addition time and the oxygen lance position information to control the converter smelting process in the next cycle.

[0138] Based on the feeding amount, feeding time and oxygen lance position information of the auxiliary raw materials determined in step S102, the converter smelting process in the next cycle is controlled to meet the slagging and dephosphorization requirements.

[0139] In the second aspect, based on the same inventive concept, the present invention provides a converter smelting control device through an embodiment of the present invention, which can be applied to the converter smelting process, specifically to the dephosphorization process of converter smelting. Figure 11 As shown, the converter smelting control device may include:

[0140] The data acquisition unit 201 is used to obtain the changes in auxiliary raw materials, scrap steel, molten iron and furnace conditions in the converter during the current cycle;

[0141] The data processing unit 202 is used to determine the amount and time of auxiliary raw materials to be added and the oxygen lance position information for the next cycle based on the changes in auxiliary raw materials, scrap steel, molten iron and furnace conditions in the current cycle;

[0142] The control unit 203 is used to control the converter smelting process in the next cycle by using the feeding amount and feeding time of the auxiliary raw materials and the oxygen lance position information.

[0143] As an optional implementation manner, the data processing unit 202 is specifically configured to:

[0144] Determining the amount of auxiliary raw materials added, the addition time, and oxygen lance position information for the next cycle based on changes in the auxiliary raw materials during the current cycle; wherein the auxiliary raw materials include lime, ore, and limestone; if the limestone content in the lime is detected to be greater than a first preset threshold during the current cycle, lime is added based on a first incremental threshold, while ore and limestone are not added, the oxygen lance position is increased based on a second incremental threshold, and the addition time is determined based on the actual oxygen blowing percentage during the next cycle;

[0145] If the powdering ratio of white ash detected in the current cycle is greater than the second preset threshold, white ash is added based on the first incremental threshold, ore is added based on the third preset threshold, the oxygen lance position is increased based on the second incremental threshold, and the feeding time is determined based on the actual oxygen blowing percentage in the early stage of blowing in the next cycle.

[0146] As an optional implementation manner, the data processing unit 202 is further configured to:

[0147] According to the changes in scrap steel in the current cycle, the feeding amount, feeding time and oxygen lance position information of the auxiliary raw materials in the next cycle are determined; wherein, the auxiliary raw materials also include light-burned dolomite. If the proportion of scrap steel detected in the current cycle is greater than the fourth preset threshold, light-burned dolomite and lime are added based on the first proportion threshold in the early stage of blowing in the next cycle, the oxygen lance position is lowered based on the first reduction threshold, and the feeding time is determined based on the actual oxygen blowing percentage; if the proportion of scrap steel detected in the current cycle is less than the fifth preset threshold, light-burned dolomite and lime are added based on the first proportion threshold in the early stage of blowing in the next cycle, limestone is added based on the second increment threshold, and the feeding time is determined based on the actual oxygen blowing percentage.

[0148] As an optional implementation manner, the data processing unit 202 is further configured to:

[0149] Based on changes in the molten iron during the current cycle, the amount of auxiliary raw materials to be added, the addition time, and oxygen lance position information for the next cycle are determined. If the silicon content in the molten iron is detected to be greater than a sixth preset threshold value during the current cycle, the silicon oxide content is controlled within a target requirement within a preset oxygen blowing percentage range using a double-slag method during the early stages of blowing in the next cycle. Limestone is added based on a second incremental threshold value, and the addition time is determined based on the actual oxygen blowing percentage.

[0150] If the silicon content of the molten iron is detected to be less than the seventh preset threshold value during the current cycle, the amount of slag is increased based on the third incremental threshold value at the beginning of blowing during the next cycle, ore is added based on the actual slagging situation, and the addition time is determined based on the actual oxygen blowing percentage.

[0151] If the proportion of phosphorus in the molten iron is detected to be greater than the eighth preset threshold value in the current cycle, the double slag method is used to control the phosphorus oxide content within the target requirement within the preset oxygen blowing percentage range in the early stage of blowing in the next cycle, limestone is added based on the second incremental threshold value, and the feeding time is determined based on the actual oxygen blowing percentage.

[0152] As an optional implementation manner, the data processing unit 202 is further configured to:

[0153] According to the changes in the furnace conditions in the current cycle, the feeding amount, feeding time and oxygen lance position information of the auxiliary raw materials in the next cycle are determined; among which, if it is detected that the idle time of the converter is greater than the ninth preset threshold in the current cycle, or it is detected that the converter has completed the furnace replenishment operation in the current cycle, then in the early stage of blowing in the next cycle, light-burned dolomite is added based on the second reduction threshold, the oxygen lance position is increased based on the second increment threshold, and the feeding time is determined based on the actual oxygen blowing percentage.

[0154] As an optional implementation manner, the data processing unit 202 is further configured to:

[0155] If it is detected that the auxiliary raw materials, scrap steel, molten iron and furnace conditions are all in normal changes in the current cycle, then in the next cycle, lime, light-burned dolomite, ore and limestone are added based on the preset standard proportions, the oxygen lance position is controlled based on the preset standard lance position, and the feeding time is determined based on the actual oxygen blowing percentage.

[0156] Since the converter smelting control device described in this embodiment is an electronic device used to implement the converter smelting control method in the embodiment of the present invention, those skilled in the art will be able to understand the specific implementation and various variations of the electronic device of this embodiment based on the converter smelting control method described in the embodiment of the present invention. Therefore, how the electronic device implements the method in the embodiment of the present invention will not be described in detail here. As long as those skilled in the art can implement the electronic device used in the converter smelting control method in the embodiment of the present invention, it falls within the scope of protection of the present invention.

[0157] On the third aspect, based on the same inventive concept, an embodiment of the present invention provides a converter smelting control device, which can be applied to the converter smelting process, specifically to the dephosphorization process of converter smelting.

[0158] refer to Figure 12As shown, the converter smelting control device provided by an embodiment of the present invention includes: a memory 301, a processor 302 and a code stored in the memory and executable on the processor 302. When executing the code, the processor 302 implements any implementation of the converter smelting control method described above.

[0159] Among them, Figure 3 In the embodiment of the present invention, a bus architecture (represented by bus 300) is shown. Bus 300 may include any number of interconnected buses and bridges, and bus 300 links together various circuits including one or more processors represented by processor 302 and memory represented by memory 301. Bus 300 may also link together various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. Bus interface 305 provides an interface between bus 300 and receiver 303 and transmitter 304. Receiver 303 and transmitter 304 may be the same component, namely a transceiver, which provides a unit for communicating with various other devices over a transmission medium. Processor 302 is responsible for managing bus 300 and general processing, while memory 301 may be used to store data used by processor 302 when performing operations.

[0160] In a fourth aspect, the present invention provides a converter through an embodiment of the present invention, comprising the converter smelting control device in the third aspect.

[0161] Fifthly, Figure 13 As shown, based on the same inventive concept, the present invention provides a computer-readable storage medium 400 through an embodiment of the present invention, on which a computer program 401 is stored. When the computer program 401 is executed by a processor, any implementation method of the converter smelting control method described above is implemented.

[0162] The technical solutions in the above embodiments of the present invention have at least the following technical effects or advantages:

[0163] By continuously monitoring the auxiliary raw materials, scrap steel, molten iron and furnace conditions, once abnormalities occur in the auxiliary raw materials, scrap steel, molten iron and furnace conditions in the current cycle, reasonable improvements will be made to the auxiliary raw materials, scrap steel, molten iron and furnace conditions in the next cycle, which can achieve better dephosphorization effect in the converter smelting process, increase the stability of the converter smelting operation process, and improve the quality of the smelted steel products.

[0164] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable code.

[0165] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as combinations of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer instructions. These computer instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the process in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0166] These computer instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0167] These computer instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0168] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0169] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A converter smelting control method, characterized in that: include: Obtain changes in auxiliary raw materials, scrap steel, molten iron, and furnace conditions in the converter during the current cycle; Determining the amount of auxiliary raw materials, the feeding time, and oxygen lance position information for the next cycle based on changes in the auxiliary raw materials, the scrap steel, the molten iron, and the furnace conditions in the current cycle; Using the feeding amount and feeding time of the auxiliary raw materials and the oxygen lance position information, the converter smelting process in the next cycle is controlled; The step of determining the amount of auxiliary raw materials to be added, the time of addition, and oxygen lance position information in the next cycle based on changes in the auxiliary raw materials, the scrap steel, the molten iron, and the furnace conditions in the current cycle includes: Determining the amount of the auxiliary raw material to be added, the time of addition, and the oxygen lance position information for the next cycle according to the change of the auxiliary raw material in the current cycle; The auxiliary raw materials include lime, ore, and limestone. If the limestone content in the lime is detected to be greater than a first preset threshold value in the current cycle, lime is added based on a first incremental threshold value at the early stage of blowing in the next cycle, while ore and limestone are not added. The oxygen lance position is increased based on a second incremental threshold value, and the addition time is determined based on the actual oxygen blowing percentage. If it is detected in the current cycle that the pulverization ratio of the white ash is greater than the second preset threshold, then in the early stage of blowing in the next cycle, white ash is added based on the first incremental threshold, ore is added based on the third preset threshold, the oxygen lance position is increased based on the second incremental threshold, and the feeding time is determined based on the actual oxygen blowing percentage.

2. The method according to claim 1, wherein The step of determining the amount of auxiliary raw materials to be added, the time of addition, and oxygen lance position information in the next cycle based on changes in the auxiliary raw materials, the scrap steel, the molten iron, and the furnace conditions in the current cycle includes: Determining the amount of auxiliary raw materials to be added, the time of addition, and the position information of the oxygen lance in the next cycle according to the change of the scrap steel in the current cycle; The auxiliary raw material further includes light-burned dolomite. If the proportion of scrap steel detected in the current cycle is greater than a fourth preset threshold, light-burned dolomite and lime are added at the early stage of blowing in the next cycle based on a first proportion threshold, the oxygen lance position is lowered based on a first reduction threshold, and the addition time is determined based on an actual oxygen blowing percentage. If it is detected in the current cycle that the proportion of scrap steel is less than the fifth preset threshold, then in the early stage of blowing in the next cycle, light-burned dolomite and lime are added based on the first proportion threshold, limestone is added based on the second incremental threshold, and the adding time is determined based on the actual oxygen blowing percentage.

3. The method according to claim 2, wherein The step of determining the amount of auxiliary raw materials to be added, the time of addition, and oxygen lance position information in the next cycle based on changes in the auxiliary raw materials, the scrap steel, the molten iron, and the furnace conditions in the current cycle includes: Determining the amount of auxiliary raw materials to be added, the time of addition, and the position information of the oxygen lance in the next cycle according to the change of the molten iron in the current cycle; If the silicon content in the molten iron is detected to be greater than a sixth preset threshold value during the current cycle, the silicon oxide content is controlled within a target requirement within a preset oxygen blowing percentage range using a double slag method during the early blowing period of the next cycle, limestone is added based on a second incremental threshold value, and the addition time is determined based on the actual oxygen blowing percentage. If the proportion of silicon in the molten iron is detected to be less than a seventh preset threshold value in the current cycle, then in the next cycle, the amount of slag is increased based on the third incremental threshold value at the early stage of blowing, ore is added based on actual slagging conditions, and the feeding time is determined based on an actual oxygen blowing percentage; If it is detected in the current cycle that the proportion of phosphorus in the molten iron is greater than the eighth preset threshold value, then in the early stage of blowing in the next cycle, the double slag method is used to control the phosphorus oxide content within the target requirement within the preset oxygen blowing percentage range, limestone is added based on the second incremental threshold value, and the feeding time is determined based on the actual oxygen blowing percentage.

4. The method according to claim 3, wherein The step of determining the amount of auxiliary raw materials to be added, the time of addition, and oxygen lance position information in the next cycle based on changes in the auxiliary raw materials, the scrap steel, the molten iron, and the furnace conditions in the current cycle includes: Determining the amount of auxiliary raw materials to be added, the time of addition, and the position information of the oxygen lance in the next cycle according to the changes in the furnace conditions in the current cycle; Among them, if it is detected that the idle time of the converter is greater than the ninth preset threshold value in the current cycle, or it is detected that the converter completes the furnace replenishment operation in the current cycle, then in the early stage of blowing in the next cycle, light-burned dolomite is added based on the second reduction threshold value, the oxygen lance position is increased based on the second increment threshold value, and the feeding time is determined based on the actual oxygen blowing percentage.

5. The method according to claim 2, wherein Also includes: If it is detected that the auxiliary raw materials, the scrap steel, the molten iron and the furnace condition are all in normal changes in the current cycle, then in the next cycle, lime, light-burned dolomite, ore and limestone are added based on the preset standard proportions, the oxygen lance position is controlled based on the preset standard lance position, and the feeding time is determined based on the actual oxygen blowing percentage.

6. A converter smelting control device, characterized in that: include: The data acquisition unit is used to obtain the changes in auxiliary raw materials, scrap steel, molten iron and furnace conditions in the converter during the current cycle; a data processing unit, configured to determine, based on changes in the auxiliary raw materials, the scrap steel, the molten iron, and the furnace conditions in the current cycle, the amount and time of adding the auxiliary raw materials and information on the oxygen lance position in the next cycle; a control unit, configured to control the converter smelting process in the next cycle by using the feeding amount and feeding time of the auxiliary raw material and the oxygen lance position information; The step of determining the amount of auxiliary raw materials to be added, the time of addition, and oxygen lance position information in the next cycle based on changes in the auxiliary raw materials, the scrap steel, the molten iron, and the furnace conditions in the current cycle includes: Determining the amount of the auxiliary raw material to be added, the time of addition, and the oxygen lance position information for the next cycle according to the change of the auxiliary raw material in the current cycle; The auxiliary raw materials include lime, ore, and limestone. If the limestone content in the lime is detected to be greater than a first preset threshold value in the current cycle, lime is added based on a first incremental threshold value at the early stage of blowing in the next cycle, while ore and limestone are not added. The oxygen lance position is increased based on a second incremental threshold value, and the addition time is determined based on the actual oxygen blowing percentage. If it is detected in the current cycle that the pulverization ratio of the white ash is greater than the second preset threshold, then in the early stage of blowing in the next cycle, white ash is added based on the first incremental threshold, ore is added based on the third preset threshold, the oxygen lance position is increased based on the second incremental threshold, and the feeding time is determined based on the actual oxygen blowing percentage.

7. A converter smelting control device, comprising a memory, a processor, and a code stored in the memory and executable on the processor, characterized in that: When the processor executes the code, the method according to any one of claims 1 to 5 is implemented.

8. A converter, characterized in that: Including the converter smelting control equipment as described in claim 7.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 5 is implemented.

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