Blast furnace hearth slag iron control method and equipment, storage medium and product

Abstract

The invention discloses a blast furnace hearth slag iron control method, equipment, a storage medium and a product, and the method comprises the following steps: collecting production parameters when raw materials are planned to be put into a blast furnace for steel smelting, calculating a first volume of slag iron theoretically generated in the blast furnace according to the production parameters, and calculating a second volume of slag iron theoretically generated in the blast furnace when the blast furnace finishes steel smelting; and measuring the second volume of the slag iron actually discharged by the blast furnace, calculating the height of the residual slag iron in the hearth of the blast furnace according to the difference between the first volume and the second volume, and controlling the blast furnace according to the residual slag iron and the height. Various production parameters in the process that raw materials are put into a blast furnace to smelt steel are collected, the first volume of theoretical slag iron is calculated on the basis of the parameters, the second volume of the slag iron actually discharged after blast furnace smelting is completed is combined, and the height of the residual slag iron in a hearth is calculated by comparing the difference between the first volume and the second volume. The accuracy of detecting the height of the residual slag iron in the blast furnace hearth is improved, and the safety of blast furnace steel smelting is also improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of blast furnace ironmaking, and in particular to a blast furnace hearth slag iron control method, equipment, storage medium and product. Background Art

[0002] Blast furnace smelting is one of the links in the steel production process. It mainly smelts raw materials such as iron ore, coke and limestone at high temperature to obtain molten iron and generate slag. The emission control of slag iron in the furnace is usually more important for the stability of the smelting process and the safety of the blast furnace. If there is too much slag iron in the furnace, it will affect the thermal balance and airflow distribution inside the blast furnace, and may also cause abnormal operation of the blast furnace and equipment failure. Reasonable control of the generation and emission of slag iron is one of the factors that stabilize the steel production process.

[0003] Traditional methods of monitoring slag in blast furnaces and discharging slag mainly rely on experience and manual monitoring. These methods lack the support of data calculation and are affected by human factors. They have low stability, resulting in low detection accuracy of slag accumulation in the blast furnace hearth, affecting the safety of steel smelting in blast furnaces. Summary of the invention

[0004] The invention provides a blast furnace hearth slag control method, equipment, storage medium and product, which are used to improve the accuracy of detecting the remaining slag in the blast furnace and improve the safety of smelting steel in the blast furnace.

[0005] In a first aspect, this embodiment provides a blast furnace hearth slag iron control method, comprising:

[0006] Collect production parameters when planning to put raw materials into a blast furnace to smelt steel;

[0007] Calculating a first volume of slag iron theoretically produced in the blast furnace according to the production parameters;

[0008] When the blast furnace has finished smelting steel, measuring a second volume of the slag iron actually discharged from the blast furnace;

[0009] Calculating the height of the remaining slag in the hearth of the blast furnace according to the difference between the first volume and the second volume;

[0010] The blast furnace is controlled according to the remaining slag and the height.

[0011] In a second aspect, this embodiment further provides a blast furnace hearth slag iron control device, comprising:

[0012] The production parameter collection module is used to collect production parameters when planning to put raw materials into the blast furnace to smelt steel;

[0013] A first volume calculation module, used for calculating a first volume of slag iron theoretically produced in the blast furnace according to the production parameters;

[0014] A second volume calculation module is used to measure a second volume of the slag iron actually discharged from the blast furnace when the blast furnace completes smelting steel;

[0015] A residual slag height calculation module, used for calculating the height of the residual slag in the hearth of the blast furnace according to the difference between the first volume and the second volume;

[0016] A blast furnace control module is used to perform control operations on the blast furnace according to the remaining slag and the height.

[0017] In a third aspect, an embodiment of the present invention further provides a computer device, the computer device comprising:

[0018] one or more processors;

[0019] A storage device for storing one or more programs;

[0020] When the one or more programs are executed by the one or more processors, the one or more processors implement the blast furnace hearth slag and iron control method as provided in the first aspect of the present invention.

[0021] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the blast furnace hearth slag and iron control method provided in the first aspect of the present invention.

[0022] In a fifth aspect, an embodiment of the present invention further provides a computer program product, the computer program product comprising a computer program, and when the computer program is executed by a processor, the blast furnace hearth slag iron control method provided in the first aspect of the present invention is implemented.

[0023] In the embodiment of the present invention, the production parameters when the raw materials are put into the blast furnace for smelting steel are collected, the first volume of the theoretical slag iron produced in the blast furnace is calculated according to the production parameters, when the blast furnace completes smelting steel, the second volume of the slag iron actually discharged from the blast furnace is measured, the height of the remaining slag iron in the furnace of the blast furnace is calculated according to the difference between the first volume and the second volume, and the blast furnace is controlled according to the remaining slag iron and the height. By collecting various production parameters in the process of raw materials being put into the blast furnace for smelting steel, and calculating the first volume of the theoretical slag iron based on these parameters, and then combining the second volume of the slag iron actually discharged after the smelting of the blast furnace, and comparing the difference between the two to infer the height of the remaining slag iron in the furnace, the accuracy of detecting the height of the remaining slag iron in the furnace of the blast furnace is improved, based on this height data, the operation process of the blast furnace can be adjusted and optimized in real time, and the excessive accumulation of slag iron can be prevented from having a negative impact on the internal operation of the blast furnace, which helps to avoid the risks caused by excessive load or operational errors, and improves the safety of smelting steel in the blast furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A flow chart of a blast furnace hearth slag and iron control method provided in Embodiment 1 of the present invention;

[0025] Figure 2 A schematic diagram of the structure of molten iron and slag in a blast furnace hearth provided in Embodiment 1 of the present invention;

[0026] Figure 3 A structural block diagram of a blast furnace hearth slag iron control device provided in Embodiment 2 of the present invention;

[0027] Figure 4 A schematic diagram of the structure of a computer device provided in Embodiment 3 of the present invention. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0029] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present invention described herein can cover sequential implementations other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0030] Embodiment 1

[0031] See also Figure 1 , shows a flow chart of a blast furnace hearth slag iron control method provided by the first embodiment of the present invention, the method can be executed by a blast furnace hearth slag iron control device, the blast furnace hearth slag iron control device can be implemented in the form of hardware and / or software, and the blast furnace hearth slag iron control device can be configured in a computer device. Figure 1 As shown, the method includes:

[0032] Step 101: Collect production parameters when planning to put raw materials into a blast furnace to smelt steel.

[0033] Raw materials refer to the various substances that go into the blast furnace to smelt steel. These raw materials include iron ore, coke, limestone, etc. Iron ore is the main source of iron, coke is used as a fuel and reducing agent to help iron ore be reduced to iron, and limestone is used to form slag to help remove impurities.

[0034] Blast furnace steelmaking is the process of converting raw materials into liquid iron and slag in a blast furnace. During this process, the iron in the iron ore reacts with the carbon in the coke to form iron, while the limestone reacts with the impurities to form slag. The result of the smelting is pure iron and slag. Blast furnace smelting is a continuous, automated industrial process commonly used in large-scale steel production. The blast furnace refers to this smelting equipment, and its process needs to be precisely controlled to ensure production efficiency and product quality.

[0035] In this embodiment, according to the smelting plan, raw materials are put into a blast furnace to smelt steel, and generation parameters of the blast furnace during steel smelting are collected, and the generation parameters are used to provide data basis for subsequent analysis of the blast furnace slag.

[0036] Exemplarily, the production parameters include the volume of the hearth of the blast furnace, the comprehensive grade of the incoming furnace, the calcium oxide content in the raw materials, the density of iron, the density of slag, the weight of the raw materials and the safe slag iron content of the hearth of the blast furnace.

[0037] The volume of the blast furnace hearth is calculated based on the radius of the blast furnace hearth and the vertical distance from the tuyere to the iron mouth of the blast furnace hearth.

[0038] V stove =πr 2 ·h;

[0039] Where V stove It represents the volume of the blast furnace hearth, and h represents the vertical distance from the tuyere to the iron mouth of the blast furnace hearth.

[0040] The comprehensive grade entering the furnace refers to the proportion of iron in the raw materials, which can be calculated by weighted average based on the iron content of each raw material and the amount of each raw material put into the raw materials. The present invention does not make any restrictions here. The calculation of the calcium oxide (CaO) content in the raw materials can be based on chemical analysis data to determine the content of calcium in the raw materials, and multiply it by the quality factor to obtain the calcium oxide content. The present invention does not make any restrictions here.

[0041] The safe slag iron content of the blast furnace hearth is obtained by dividing the safe molten slag iron volume by the filling factor. The filling factor refers to the ratio of the volume of liquid slag iron in the hearth to the geometric volume of the filled part of the hearth. The safe slag iron content of the blast furnace hearth can be calculated according to the following formula:

[0042]

[0043] Where, T represents the safe slag iron content of the blast furnace hearth, V s represents the safe slag iron volume, and α represents the filling factor.

[0044] The safe slag iron volume can be calculated based on the safety factor, the radius of the blast furnace, and the vertical distance from the blast furnace tuyere to the iron mouth. The safe slag iron volume can be calculated using the following formula:

[0045] V s =β·π·r 2 ·h;

[0046] Where V s represents the safe slag iron volume, β represents the safety factor, r represents the radius of the blast furnace hearth, h represents the vertical distance from the tuyere to the iron mouth of the blast furnace hearth, and μ represents the volume ratio of iron to the safe solution volume.

[0047] The safety factor can be 0.6, which is used to ensure that smelting is carried out without exceeding the volume of the furnace hearth of the blast furnace. The safety factor reserves a certain volume of the blast furnace and avoids the risk caused by excessive solution (molten iron and slag).

[0048] The vertical distance from the tuyere to the iron mouth of the blast furnace refers to the straight-line distance from the center of the tuyere (i.e., blast pipe) of the blast furnace to the center of the iron mouth (i.e., molten metal discharge port) of the blast furnace. This distance is usually important for the design, operation, and thermodynamic optimization of the blast furnace, affecting the distribution of airflow, the balance of temperature in the furnace, and the smelting efficiency.

[0049] Step 102: Calculate the first volume of slag iron theoretically produced in the blast furnace according to the production parameters.

[0050] In this embodiment, the first volume of slag iron theoretically produced in the blast furnace is calculated based on production parameters and raw materials planned to be put into the blast furnace, in order to estimate the theoretical amount of slag iron produced in the blast furnace during the steelmaking process. It helps control the generation and discharge of slag iron in the blast furnace and ensure the smooth progress of the steelmaking process. By understanding the first volume of slag iron that should be produced in theory, it can be compared with the actual situation, abnormalities can be discovered in time, and the safety and efficiency of blast furnace operation can be ensured.

[0051] Specifically, the product of the comprehensive grade of the raw materials entering the furnace and the weight of the raw materials is calculated to obtain the first generated iron amount, and the first generated iron amount is divided by the density of iron to obtain the volume of the first generated iron amount; according to the principle of calcium oxide balance, the calcium oxide content in the raw materials is divided by the proportion of calcium oxide in the slag in the furnace of the blast furnace to obtain the first generated slag amount, and the first generated slag amount is divided by the density of the slag to obtain the volume of the first generated slag amount; the sum of the volume of the first generated iron amount and the volume of the first generated slag amount is taken as the first volume of slag iron theoretically produced in the blast furnace, thereby providing a theoretical basis for the discharge of slag iron during the smelting process.

[0052] Preferably, the calculation formula for the first volume of slag iron can be expressed as:

[0053] T iron =δ·T f ;

[0054]

[0055] V1=V iron +V slag ;

[0056] Where, T iron is the first product iron amount, δ is the comprehensive grade of the furnace, T f is the weight of the raw material, V iron is the volume of the first generated iron, ρ iron is the density of iron, T slag is the first generated slag amount, Cao Tf is the calcium oxide content in the raw materials, γ is the calcium oxide content of the slag in the furnace of the blast furnace, V slag is the volume of the first generated slag, ρ slagis the density of slag, and V1 is the first volume of slag iron.

[0057] Step 103: When the blast furnace has completed smelting steel, measure the second volume of slag iron actually discharged from the blast furnace.

[0058] In this embodiment, when the blast furnace completes steel smelting, the second volume of slag actually discharged from the blast furnace is measured to evaluate the actual slag removal situation in the steel smelting process, so as to facilitate the subsequent comparison of the actual discharge volume with the theoretical generation volume, and to better adjust the smelting parameters and operating conditions to reduce waste and resource loss.

[0059] Specifically, the actual second-generation iron amount and second-generation slag amount of the blast furnace are measured in real time by an electronic scale installed outside the furnace of the blast furnace, and the second-generation iron amount is divided by the density of iron to obtain the second-generation iron volume; the second-generation slag amount is divided by the density of slag to obtain the second-generation slag volume, and the sum of the second-generation iron volume and the second-generation slag volume is used as the second volume of slag iron actually discharged from the blast furnace. The actual amount of slag iron discharged during the steel smelting process and its volume are recorded as a basis for comparison with the theoretical calculation results of slag iron generation, so as to more accurately evaluate and optimize the smelting process and ensure the stability and efficiency of the production process.

[0060] Preferably, the calculation formula of the second volume of slag iron is expressed as:

[0061]

[0062] V2=V iron2 +V slag2 ;

[0063] Where, T iron2 is the amount of second generation iron, V iron2 is the volume of the second generated iron, ρ iron is the density of iron, T slag2 is the amount of second generation slag, V slag2 is the volume of the second generated slag, ρ slag is the density of slag, and V2 is the second volume of slag iron.

[0064] Optionally, the second volume of the slag iron may also be solved according to a calculation formula for the safe slag iron content of the hearth of the blast furnace to obtain the second volume of the slag iron.

[0065] Step 104: Calculate the height of the remaining slag in the furnace of the blast furnace according to the difference between the first volume and the second volume.

[0066] In this embodiment, by calculating the difference between the first volume (theoretically generated slag volume) and the second volume (actually discharged slag volume), the height of the remaining slag in the blast furnace hearth is estimated, and the actual accumulation of slag in the hearth can be monitored in real time to ensure the stability and efficiency of the smelting process, and to promptly detect whether there is excessive slag accumulation or other abnormal conditions, thereby providing a basis for adjusting operating parameters and optimizing the production process, improving production efficiency and reducing energy consumption.

[0067] Specifically, the difference between the first volume and the second volume is used as the third volume of the remaining slag in the hearth of the blast furnace, and the height of the remaining slag in the hearth of the blast furnace is calculated based on the third volume and the volume of the hearth of the blast furnace. The third volume is divided by the square of the radius of the hearth of the blast furnace and π to obtain the height of the remaining slag in the hearth of the blast furnace. The approximate number of times raw materials are added to smelt steel can be estimated based on the height of the remaining slag in the hearth of the blast furnace, and the accumulation of the remaining slag inside the blast furnace can be estimated based on the number of times. The trend of the remaining slag can be simulated in real time to determine whether the slag is close to the safety line of the blast furnace, which is convenient for subsequent protection of the blast furnace and ensures the stability and safety of the smelting process.

[0068] Preferably, the calculation formula for the height of the remaining slag can be expressed as:

[0069] V3 = V1 - V2;

[0070]

[0071] Wherein, V3 is the third volume of the remaining slag, V1 is the first volume, V2 is the second volume, h3 is the height of the remaining slag, and r is the radius of the furnace of the blast furnace.

[0072] Step 105: Control the blast furnace according to the remaining slag and the height.

[0073] In this embodiment, the residual slag is a byproduct. If the residual slag accumulates too much, it will lead to insufficient space in the blast furnace hearth, thereby affecting the efficiency and safety of smelting steel in the blast furnace. Excessive accumulation of residual slag will increase the pressure of the blast furnace hearth and may even cause overheating or damage to the blast furnace hearth. By monitoring the height of the residual slag in the blast furnace, the operation of the blast furnace can be accurately controlled to prevent excessive accumulation of residual slag during the blast furnace smelting process.

[0074] In one embodiment of the present invention, step 105 may include the following steps:

[0075] Step 1051: If the height of the remaining slag is greater than or equal to the warning height set for the blast furnace, the blast furnace performs blast furnace protection operations.

[0076] In this embodiment, when the height of the remaining slag is greater than or equal to the set warning height, it indicates that the accumulation of remaining slag in the blast furnace has approached the critical value, which may affect the normal operation of the blast furnace. If no measures are taken, it may cause problems such as overload of the blast furnace hearth, uncontrolled temperature in the furnace, and slag blockage, which will cause safety hazards and even cause the blast furnace to stop production. Therefore, performing blast furnace protection operations is to intervene in time when a danger signal appears, take corresponding measures to prevent the blast furnace from entering a dangerous state.

[0077] Exemplarily, the warning height includes a first-level height and a second-level height, and the first-level height is lower than the second-level height. By setting the first-level height and the second-level height, different operating measures can be taken when the accumulation of residual slag reaches different levels. This hierarchical management method helps to discover potential problems earlier and take timely actions, thereby avoiding safety hazards caused by excessive accumulation of residual slag.

[0078] If the height of the remaining slag is greater than or equal to the first level, a reminder operation is performed on the blast furnace. The first level is a lower warning level, indicating that the accumulation of remaining slag has begun to approach the safe operating limit of the blast furnace. When the remaining slag accumulation reaches this height, although it has not yet reached a serious dangerous state, it has already caused enough attention, so a reminder operation is performed to warn the operator and prepare in advance.

[0079] If the height of the remaining slag is greater than or equal to the second level, the discharge speed of the remaining slag is accelerated and / or the lowering speed of the raw materials is slowed down. When the remaining slag accumulates to the second level, it means that the remaining slag has approached or exceeded the safety limit of the blast furnace, and more urgent and direct measures must be taken, such as accelerating the discharge of slag or slowing down the speed of lowering raw materials, which can effectively prevent damage to the blast furnace and accidents caused by excessive remaining slag.

[0080] For example, Figure 2 The figure shows the schematic diagram of slag and molten iron in the blast furnace hearth. Figure 2 It includes two tuyere, one iron mouth, the lower edge position of the tuyere, the slag interface and the molten iron interface. The slag interface is marked in orange and the molten iron interface is marked in red.

[0081] The tuyere of a blast furnace refers to the opening at the bottom of the blast furnace hearth for letting in air (or oxygen-enriched air). Through the tuyere, the blower sends air into the blast furnace to provide the oxygen required for blast furnace combustion. The high-temperature air reacts with the carbon in the charge to produce carbon monoxide, which participates in the reduction reaction in the furnace and helps reduce the iron oxide in the raw materials to iron. In addition, the tuyere also plays an important role in regulating the temperature, airflow and smelting reaction in the blast furnace.

[0082] The taphole is the opening at the bottom of the blast furnace for discharging molten iron and slag. Through the taphole, the molten iron and slag in the blast furnace can be discharged regularly to ensure the normal flow of slag and iron in the furnace and the safe operation of the blast furnace. The taphole opening and closing control and the adjustment of the discharge speed affect the production efficiency and smelting effect of the blast furnace. It is usually necessary to operate at the right time to ensure the reasonable separation of molten iron and slag and the stable operation of the blast furnace.

[0083] The lower edge position of the tuyere is used to calibrate the first-level height and the second-level height. The first-level height is the vertical distance from the slag liquid surface to the tuyere of 1 meter, and the second-level height is the vertical distance from the slag liquid surface to the tuyere of 0.5 meter. Each time the raw materials are added according to the plan, the slag surface in the blast furnace hearth automatically rises by one height. When the iron is discharged, the first-level height and the second-level height can be automatically adjusted in real time according to the slag flow, or they can be adjusted manually by calculation to enhance the safety of the steel smelting process.

[0084] The purpose of color classification is to distinguish the slag and iron liquid levels. In actual production, the slag floats on the surface and the molten iron is below the slag.

[0085] Step 1052: If the remaining slag is greater than or equal to the safe slag content of the hearth of the blast furnace, the discharge speed of the remaining slag is accelerated and / or the lowering speed of the raw materials is slowed down.

[0086] In this embodiment, if the height of the remaining slag reaches or exceeds the safe slag content of the blast furnace hearth, it means that the slag in the furnace has approached or exceeded its safe load limit, which may pose a threat to the operation of the blast furnace. Therefore, the discharge rate of the remaining slag can be accelerated, the excess slag can be discharged faster, and the accumulation of slag in the hearth can be reduced, thereby preventing problems such as overload and blockage caused by excessive remaining slag, and maintaining the normal load of the blast furnace; the lowering speed of the raw materials can also be slowed down, by reducing the addition of new raw materials, reducing the slag generation rate during the smelting process, and avoiding further increasing the burden of the remaining slag in the blast furnace.

[0087] In order to make the present embodiment more understandable, the blast furnace hearth slag and iron control method in the present embodiment is described below by using specific examples.

[0088] At 2500m 3 Taking the blast furnace as an example, the comprehensive grade of the blast furnace in actual production is set to 58%, and the weight of the raw materials is T f is 72t / ch, the density of molten iron is iron Take 7.0t / m 3 , the density of slag ρ slag Take 2.6t / m 3 , the first generated iron content T iron =δ·T f =58%×72=41.76t. The volume of the first generated iron According to Cao's balance principle, the first generated slag amount T slag , the actual calcium oxide content in the raw material is Cao Tf The calcium oxide content of slag in the furnace of the blast furnace is γ40%, and the first generation slag volume is The volume of the first generated slag

[0089] Given that the radius r of the blast furnace is 5.6 m, the vertical distance h from the furnace tuyere to the iron mouth is 3.6 m, the safety factor β is 0.6, and the filling factor α is 0.33, calculate the safe slag iron volume V s =β·π·r 2 h = 3.14 × 5.6 2 ×3.6×0.6=212.3m 3 Calculate the safe slag iron content of the blast furnace hearth

[0090] The theoretical first volume of iron produced is calculated by the raw materials input per unit time, and the actual second volume of slag iron discharged from the blast furnace is compared to calculate the difference in slag iron volume, and determine the position of the slag iron liquid level in the blast furnace. Assuming that the raw materials input per hour is 7 batches / hour, the theoretical first volume per hour V1=V iron +V slag =(5.96+5.45)×7=79.87m 3 For example, the blast furnace discharges 150 tons of slag per hour, and the second volume V2 occupied is 150×0.33=49.5m 3 The volume of the remaining slag in the hearth of the real-time blast furnace V3 = first volume V1 - second volume V2 = 79.87 - 49.5 = 30.37 m 3

[0091] As the raw materials are added every hour, the slag iron level in the furnace will automatically rise to a certain height. It shows that the slag iron production in the blast furnace is affected by the removal of slag iron, and the slag iron liquid level in the furnace hearth rises by 0.31m per hour.

[0092] The color of the molten iron and slag at the interface of the computer model slag iron can be distinguished. Red indicates molten iron, and orange indicates slag. The molten iron (red) is at the bottom, and the slag orange is at the top. The layers are clear and cannot be mixed. The slag iron line at this interface shows an upward trend. The height of the blast furnace hearth is divided into proportional steps, with 0.1m as a scale, and the shape and outline of the hearth are drawn. The position of the lower edge of the tuyere is marked in proportion. The position of the lower edge of the tuyere should be marked with a special color. This is the warning line for the remaining slag iron in the hearth of the blast furnace.

[0093] The first level height and the second level height are marked on the lower edge of the tuyere, and according to the actual slag discharge situation in the blast furnace hearth, the operator is reminded to speed up the discharge of the remaining slag and / or slow down the lowering speed of the raw materials.

[0094] In the embodiment of the present invention, the production parameters when the raw materials are put into the blast furnace for smelting steel are collected, the first volume of the theoretical slag iron produced in the blast furnace is calculated according to the production parameters, when the blast furnace completes smelting steel, the second volume of the slag iron actually discharged from the blast furnace is measured, the height of the remaining slag iron in the furnace of the blast furnace is calculated according to the difference between the first volume and the second volume, and the blast furnace is controlled according to the remaining slag iron and the height. By collecting various production parameters in the process of raw materials being put into the blast furnace for smelting steel, and calculating the first volume of the theoretical slag iron based on these parameters, and then combining the second volume of the slag iron actually discharged after the smelting of the blast furnace, and comparing the difference between the two to infer the height of the remaining slag iron in the furnace, the accuracy of detecting the height of the remaining slag iron in the furnace of the blast furnace is improved, based on this height data, the operation process of the blast furnace can be adjusted and optimized in real time, and the excessive accumulation of slag iron can be prevented from having a negative impact on the internal operation of the blast furnace, which helps to avoid the risks caused by excessive load or operational errors, and improves the safety of smelting steel in the blast furnace.

[0095] Embodiment 2

[0096] Figure 3 A schematic diagram of a blast furnace slag iron control device provided in the second embodiment of the present invention is shown in FIG. Figure 3 As shown, the device comprises:

[0097] The production parameter collection module 301 is used to collect production parameters when raw materials are planned to be put into a blast furnace to smelt steel;

[0098] A first volume calculation module 302, used to calculate a first volume of slag iron theoretically produced in the blast furnace according to the production parameters;

[0099] A second volume calculation module 303 is used to measure the second volume of the slag iron actually discharged from the blast furnace when the blast furnace completes smelting steel;

[0100] A residual slag height calculation module 304 is used to calculate the height of the residual slag in the furnace of the blast furnace according to the difference between the first volume and the second volume;

[0101] The blast furnace control module 305 is used to perform control operations on the blast furnace according to the remaining slag and the height.

[0102] In one embodiment of the present invention, the production parameters include the volume of the blast furnace hearth, the comprehensive grade of the incoming furnace, the calcium oxide content in the raw materials, the density of iron, the density of slag, the weight of the raw materials and the safe slag iron content of the blast furnace hearth.

[0103] In one embodiment of the present invention, the first volume calculation module 302 includes:

[0104] A first generated iron amount calculation module is used to calculate the product of the comprehensive grade of the furnace and the weight of the raw materials to obtain the first generated iron amount;

[0105] a first generated iron volume calculation module, configured to divide the first generated iron amount by the density of the iron to obtain a first generated iron volume;

[0106] A first generated slag amount calculation module, used for obtaining the first generated slag amount according to the calcium oxide content in the raw materials and the calcium oxide balance principle;

[0107] a first generated slag volume calculation module, configured to obtain the first generated slag volume by dividing the first generated slag volume by the density of the slag;

[0108] A first volume acquisition module is used to take the sum of the first generated iron volume and the first generated slag volume as the first volume of slag theoretically produced in the blast furnace.

[0109] In one embodiment of the present invention, the second volume calculation module 303 includes:

[0110] A slag iron quantity measuring module, used for respectively measuring the actual second generated iron quantity and the second generated slag quantity of the blast furnace;

[0111] a second generated iron volume calculation module, configured to obtain a second generated iron volume by dividing the second generated iron volume by the density of the iron;

[0112] a second generated slag volume calculation module, configured to obtain the second generated slag volume by dividing the second generated slag volume by the density of the slag;

[0113] The second volume acquisition module is used to take the sum of the second generated iron volume and the second generated slag volume as the second volume of the slag iron actually discharged from the blast furnace.

[0114] In one embodiment of the present invention, the remaining slag height calculation module 304 includes:

[0115] A third volume calculation module, configured to use the difference between the first volume and the second volume as a third volume of the remaining slag in the hearth of the blast furnace;

[0116] The height calculation module is used to divide the third volume by the volume of the furnace hearth of the blast furnace to obtain the height of the remaining slag in the furnace hearth of the blast furnace.

[0117] In one embodiment of the present invention, the blast furnace control module 305 includes:

[0118] A height judgment module, configured to execute a blast furnace protection operation on the blast furnace if the height of the remaining slag is greater than or equal to a warning height set for the blast furnace;

[0119] The content judgment module is used to speed up the discharge speed of the remaining slag and / or slow down the lowering speed of the raw materials if the remaining slag is greater than or equal to the safe slag content of the hearth of the blast furnace.

[0120] In one embodiment of the present invention, the warning altitude includes a first level altitude and a second level altitude; the first level altitude is lower than the second level altitude; the altitude judgment module includes:

[0121] A reminder operation module, configured to perform a reminder operation on the blast furnace if the height of the remaining slag is greater than or equal to the first level height;

[0122] The blast furnace operation module is used for accelerating the discharge speed of the remaining slag and / or slowing down the lowering speed of the raw materials if the height of the remaining slag is greater than or equal to the second level height.

[0123] The blast furnace hearth slag iron control device provided in the embodiment of the present invention can execute the blast furnace hearth slag iron control method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects for executing the blast furnace hearth slag iron control method.

[0124] Embodiment 3

[0125] See also Figure 4, showing a schematic diagram of the structure of a computer device provided by an embodiment of the present invention. The computer device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workbenches, personal digital assistants, blade servers, mainframe computers, and other suitable computers. The computer device may also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0126] like Figure 4 As shown, the computer device 10 includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the computer device 10 can also be stored. The processor 11, ROM 12 and RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0127] A number of components in the computer device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the computer device 10 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0128] The processor 11 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as a blast furnace hearth slag iron control method.

[0129] In some embodiments, the blast furnace hearth slag control method can be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed on the computer device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the blast furnace hearth slag control method described above can be performed. Alternatively, in other embodiments, the processor 11 can be configured to execute the blast furnace hearth slag control method in any other appropriate manner (for example, by means of firmware).

[0130] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0131] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0132] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0133] To provide interaction with a user, the systems and techniques described herein can be implemented on a computer device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the computer device. Other types of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0134] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0135] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0136] Embodiment 4

[0137] An embodiment of the present invention further provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the blast furnace hearth slag and iron control method provided in any embodiment of the present invention is implemented.

[0138] In the process of implementation, the computer program product can be written in one or more programming languages ​​or a combination thereof to perform the computer program code of the present invention, including object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (for example, using an Internet service provider to connect through the Internet).

[0139] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0140] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for controlling slag in a blast furnace, characterized in that: include: Collect production parameters when planning to put raw materials into a blast furnace to smelt steel; Calculating a first volume of slag iron theoretically produced in the blast furnace according to the production parameters; When the blast furnace has finished smelting steel, measuring a second volume of the slag iron actually discharged from the blast furnace; Calculating the height of the remaining slag in the hearth of the blast furnace according to the difference between the first volume and the second volume; The blast furnace is controlled according to the remaining slag and the height.

2. The method according to claim 1, characterized in that: The production parameters include the volume of the blast furnace hearth, the comprehensive grade of the incoming furnace, the calcium oxide content in the raw materials, the density of iron, the density of slag, the weight of the raw materials and the safe slag iron content of the blast furnace hearth.

3. The method according to claim 2, characterized in that The step of calculating the first volume of slag iron theoretically produced in the blast furnace according to the production parameters comprises: Calculating the product of the comprehensive grade of the input furnace and the weight of the raw materials to obtain the first generated iron amount; Dividing the first generated iron amount by the density of the iron to obtain the first generated iron volume; According to the calcium oxide content in the raw materials and the calcium oxide balance principle, a first generated slag amount is obtained; Dividing the first generated slag amount by the density of the slag to obtain the first generated slag volume; The sum of the first produced iron volume and the first produced slag volume is taken as the first volume of slag iron theoretically produced in the blast furnace.

4. The method according to claim 2, characterized in that: When the blast furnace completes smelting steel, measuring the second volume of the slag iron actually discharged from the blast furnace comprises: respectively measuring the actual second generated iron amount and the second generated slag amount of the blast furnace; Dividing the second generated iron amount by the density of the iron to obtain the second generated iron volume; Dividing the amount of the second generated slag by the density of the slag to obtain the volume of the second generated slag; The sum of the second produced iron volume and the second produced slag volume is taken as the second volume of the slag actually discharged from the blast furnace.

5. The method according to claim 1, characterized in that The step of calculating the height of the remaining slag in the hearth of the blast furnace according to the difference between the first volume and the second volume comprises: taking the difference between the first volume and the second volume as the third volume of the remaining slag iron in the hearth of the blast furnace; The height of the remaining slag in the hearth of the blast furnace is calculated according to the third volume and the volume of the hearth of the blast furnace.

6. The method according to any one of claims 1 to 5, characterized in that: The controlling operation of the blast furnace according to the remaining slag and the height includes: If the height of the remaining slag is greater than or equal to the warning height set for the blast furnace, the blast furnace performs a blast furnace protection operation; If the remaining slag is greater than or equal to the safe slag content of the hearth of the blast furnace, the discharge speed of the remaining slag is accelerated and / or the lowering speed of the raw materials is slowed down.

7. The method according to claim 6, characterized in that The warning height includes a first level height and a second level height; the first level height is lower than the second level height; if the height of the remaining slag is greater than or equal to the warning height set for the blast furnace, the blast furnace performs a blast furnace protection operation, including: If the height of the remaining slag is greater than or equal to the first level height, a reminder operation is performed on the blast furnace; If the height of the remaining slag is greater than or equal to the second level height, the discharge speed of the remaining slag is accelerated and / or the lowering speed of the raw materials is slowed down.

8. A computer device, characterized in that: The computer device comprises: one or more processors; A storage device for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the blast furnace hearth slag and iron control method as described in any one of claims 1-7.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the blast furnace hearth slag and iron control method as described in any one of claims 1-7 is implemented.

10. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the blast furnace hearth slag and iron control method as claimed in any one of claims 1 to 7 is implemented.

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