Sintering furnace excess oxygen coefficient calculation method, sintering control method and device

Abstract

The present disclosure discloses a method for calculating a sintering furnace excess oxygen coefficient, a sintering control method and an apparatus, wherein the method for calculating a sintering furnace excess oxygen coefficient includes: obtaining attribute information of each wind box in a sintering furnace, operation parameters of the sintering furnace and sintering flue gas parameters of each wind box; calculating the amount of oxygen required to combust fuel in each wind box and the actual amount of oxygen supplied to combust fuel in each wind box through a first calculation module and a second calculation module based on the attribute information, the operation parameters and the sintering flue gas parameters; and calculating the excess oxygen coefficient of each wind box based on the required amount of oxygen and the actual amount of oxygen.

Description

[Technical Field]

[0001] This application claims priority from a Chinese patent application filed on February 24, 2023, bearing application number 2023101913425, the entire contents of which are incorporated herein by reference.

[0002] The present disclosure relates to the technical field of iron ore sintering, and in particular to a method for calculating a sinter furnace excess oxygen coefficient, and a sintering control method and device. [Background technology]

[0003] Oxygen is one of the important factors participating in the sintering process and is an essential chemical component for fuel combustion in the sintering material layer. The amount of oxygen participating in fuel combustion directly affects the combustion efficiency and combustion quality, which in turn affects the amount of liquid phase generated during sintering and ultimately affects the quality indicators of sintered ore. The excess oxygen coefficient is the ratio between the actual amount of oxygen supplied to combust the fuel and the amount of oxygen required to combust the fuel. The excess oxygen coefficient allows us to intuitively and quantitatively consider the degree of excess oxygen during fuel combustion.

[0004] During the sintering process, the permeability of the sintered material layer changes. sintering furnace Since each wind box in the process is at a different sintering stage, the excess oxygen coefficient also changes at different sintering stages. Until now, there has been no effective and accurate method for detecting and calculating the excess oxygen coefficient at different sintering stages, which has limited the ability to further optimize the sintering process parameters. Summary of the Invention [Problem to be solved by the invention]

[0005] In light of this, why use an effective calculation method? sintering furnaceIt is an issue that needs to be resolved as soon as possible: how to obtain the excess oxygen coefficient of each wind box, intuitively and quantitatively consider the excess degree of oxygen during the fuel combustion process based on the excess oxygen coefficient, and ensure smooth sintering and improved sinter quality while producing sintered ore.

[0006] The present disclosure provides a method for calculating the excess oxygen coefficient of a sintering furnace, and a sintering control method and device, and aims to solve the problem of being unable to measure and calculate the excess oxygen coefficient at different sintering stages by one or more embodiments of the present disclosure. The purpose is to intuitively and quantitatively consider the excess oxygen level during the fuel combustion process based on the calculated excess oxygen coefficient, thereby ensuring smooth sintering and improved sinter quality while producing sintered ore. [Means for solving the problem]

[0007] A first aspect of the present disclosure provides a method for calculating a sintering furnace excess oxygen coefficient, the method including: obtaining attribute information of each wind box in a sintering furnace, operation parameters of the sintering furnace, and sintering flue gas parameters of each wind box; calculating a required oxygen amount for burning fuel in each wind box by a first calculation module based on the attribute information, the operation parameters, and the sintering flue gas parameters; calculating an actual oxygen amount to be supplied for burning fuel in each wind box by a second calculation module based on the attribute information, the operation parameters, and the sintering flue gas parameters; and calculating an excess oxygen coefficient of each wind box based on the required oxygen amount and the actual oxygen amount.

[0008] According to a second aspect of the present disclosure, there is provided a sintering furnace excess oxygen coefficient calculation device, the device including: an acquisition means for acquiring attribute information of each wind box in a sintering furnace, operation parameters of the sintering furnace, and sintering flue gas parameters of each wind box; a first calculation means for calculating an amount of oxygen required for burning fuel in each wind box by a first calculation module based on the attribute information, the operation parameters, and the sintering flue gas parameters; a second calculation means for calculating an actual amount of oxygen supplied for burning fuel in each wind box by a second calculation module based on the attribute information, the operation parameters, and the sintering flue gas parameters; and a third calculation means for calculating an excess oxygen coefficient of each wind box based on the required amount of oxygen and the actual amount of oxygen.

[0009] According to a third aspect of the present disclosure, there is provided a method of controlling sintering, said method comprising: sintering furnace attribute information of each wind box other than the wind box in which the ignition device is located, sintering furnace and obtaining the operation parameters and sintering flue gas parameters of each wind box; calculating the oxygen required for burning fuel in the sintering material layer corresponding to each wind box by a first calculation module based on the attribute information, the operation parameters, and the sintering flue gas parameters; calculating the actual oxygen amount to be supplied for burning fuel in the sintering material layer corresponding to each wind box by a second calculation module based on the attribute information, the operation parameters, and the sintering flue gas parameters; calculating the excess oxygen coefficient for burning fuel in the sintering material layer corresponding to each wind box based on the required oxygen amount and the actual oxygen amount; determining the theoretical minimum oxygen required amount of combustion auxiliary gas at the sintering material surface corresponding to each wind box based on the excess oxygen coefficient; and performing low-oxygen sintering and oxygen-deficient cooling based on the theoretical minimum oxygen required amount.

[0010] According to a fourth aspect of the present disclosure, there is provided a sintering control device, the device comprising: sintering furnacea first calculation means for calculating an amount of oxygen required for burning fuel in a sintering material layer corresponding to each of the wind boxes based on the attribute information, the operation parameters, and the sintering flue gas parameters by a first calculation module; a second calculation means for calculating an actual amount of oxygen to be supplied for burning fuel in a sintering material layer corresponding to each of the wind boxes based on the attribute information, the operation parameters, and the sintering flue gas parameters by a second calculation module; a third calculation means for calculating an excess oxygen coefficient for burning fuel in a sintering material layer corresponding to each of the wind boxes based on the required amount of oxygen and the actual amount of oxygen; and a sintering / cooling means for performing low-oxygen sintering and oxygen-deficient cooling based on the theoretical minimum amount of oxygen required.

[0011] According to a fifth aspect of the present disclosure, there is provided a sintering control device including a processor and a memory, wherein computer program code is stored in the memory, and when the computer program code is executed by the processor, the processor executes the above-mentioned sintering control method. [Brief explanation of the drawings]

[0012] In order to more clearly explain the technical solutions in the present disclosure, the following briefly introduces the necessary drawings describing the embodiments, and it is clear that the drawings described below are some embodiments in the present disclosure, and other drawings can be obtained based on these drawings without the need for inventive work for those skilled in the art. [Figure 1] FIG. 1 is a schematic diagram showing a sintering process in the prior art. [Figure 2] 1 is a flowchart illustrating a method for calculating a sinter furnace excess oxygen factor according to some embodiments of the present disclosure. [Figure 3] FIG. 1 is a block diagram showing the configuration of a calculation device for a sintering furnace excess oxygen coefficient according to some embodiments of the present disclosure. [Figure 4] 1 is a flowchart illustrating a method for controlling sintering according to some embodiments of the present disclosure. [Figure 5] FIG. 5 is a schematic diagram showing the process of the sintering control method in FIG. 4. [Figure 6] FIG. 1 is a block diagram illustrating a configuration of a sintering control device according to some embodiments of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0013]

[0033] Hereinafter, embodiments will be fully described by way of example with reference to the drawings. However, the illustrative embodiments can be implemented in a wide variety of forms and should not be understood as being limited to the examples set forth herein. On the contrary, the provision of these embodiments will enable the present disclosure to be thorough and complete, and will fully convey the gist of the illustrative embodiments to those skilled in the art.

[0014] Furthermore, the described features, configurations, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, more specific details are provided to fully understand the embodiments of the present disclosure. However, those skilled in the art will be able to practice the technical solutions of the present disclosure without being limited to one or more details, and may employ other methods, means, devices, steps, etc. In other cases, well-known methods, devices, implementations, or operations are expressed or described in detail to avoid obscuring aspects of the present disclosure.

[0015] The flowcharts shown in the drawings are illustrative, but do not necessarily include all contents and operations or steps, and do not necessarily have to be performed in the order described. For example, some operations or steps may be separated, or some operations or steps may be combined or partially combined. Therefore, the actual order of execution may be changed according to actual circumstances.

[0016] It should be noted that the terms "first" and "second" in the specification and patents of this disclosure and in the drawings are intended to distinguish between similar objects, but are not intended to describe a particular order or chronological order. It should be understood that the objects so used can be interchanged where appropriate, so that the embodiments of the disclosure described herein may be implemented in an order other than that shown in the drawings or described.

[0017] In this disclosure, we will first briefly explain the sintering process. As the steel industry develops rapidly, the production volume and quality of metal fillers and naturally abundant ores are far from meeting the requirements of blast furnace smelting. Therefore, the concentrated powder obtained by beneficiating large amounts of dilute ore cannot be directly put into the furnace for smelting. Therefore, such concentrated powder must be sintered into a block so that it can be used in the blast furnace. Figure 1 is a schematic diagram showing the sintering process in the prior art. As shown in Figure 1, sintering furnace Generally, the equipment includes an ignition device, a sintering cart, a wind box, and a main exhaust fan. Sintering involves mixing raw materials containing iron, fuel, and solvent in proportion, granulating them evenly, adding water to moisten them, spreading them on a sintering cart, and igniting them from top to bottom to carry out sintering. At the same time as ignition, the main exhaust fan starts to exhaust the exhaust. The wind box is used to collect sintering flue gases, which are generated during the sintering production process. Sintering flue gas The fuel is sucked in by the main exhaust fan through the wind box and the main sintering flue and discharged into the air. When ignited, the ignition device needs to provide a certain amount of heat and temperature to the surface of the sintering material layer on the sintering car (i.e., the sintering material surface) to ensure that the sintering process proceeds automatically. Within the sintering material layer on the sintering car, fuel burns from top to bottom, melting the fusible material and wetting the infusible material, and the liquid phase gradually cools and causes the infusible material to stick together. The block-shaped object obtained in this way is called sinter.

[0018] During the sintering process, oxygen is one of the important factors participating in sintering and is an essential chemical component for burning fuel in the sintering material layer. The amount of oxygen participating in fuel combustion directly affects the efficiency and quality of combustion, which in turn affects the amount of liquid phase generated during sintering, and ultimately affects the quality indicators of sintered ore. Until now, there has been no effective and accurate method for detecting and calculating the excess oxygen coefficient at different sintering stages, which has limited the ability to further optimize sintering process parameters. The present disclosure can solve the above problem, guarantee the quality of sintered ore, and sintering furnace The present invention provides a method and device for calculating the excess oxygen coefficient of a sintering furnace, which can improve production efficiency.

[0019] The details of the technical solution of the present disclosure are described in detail below.

[0020] figure 2 is a flowchart illustrating a method for calculating a sintering furnace excess oxygen factor according to some embodiments of the present disclosure.

[0021] Referring to Figure 2, According to an exemplary embodiment of the present disclosure, there is provided a method for calculating a sintering furnace excess oxygen coefficient, which may include the following steps S1 to S4. Step S1 obtains attribute information of each wind box in the sintering furnace, operation parameters of the sintering furnace, and sintering flue gas parameters of each wind box. Step S2 calculates the amount of oxygen required to combust fuel in each of the wind boxes by a first calculation module based on the attribute information, the operation parameters and the sintering flue gas parameters. Step S3: calculates the actual amount of oxygen to be supplied for burning fuel in each wind box by a second calculation module based on the attribute information, the operation parameters and the sintering flue gas parameters. In step S4, an excess oxygen coefficient for each wind box is calculated based on the required oxygen amount and the actual oxygen amount.

[0022] In the present disclosure, when obtaining the attribute information of each wind box and the sintering flue gas parameters of each wind box, first: sintering furnace According to the total number of wind boxes in sintering furnace The above can be sorted. sintering furnace When sorting the above sintering furnace If the total number of wind boxes in the sintering furnace If the number of wind boxes where the ignition devices are located is excluded (the number of wind boxes where the ignition devices are located is three), the number of wind boxes remaining is calculated as follows: sintering furnace 2 3 After sorting into sections, sintering furnace The attribute information and the sintering flue gas parameters of each wind box other than the wind box in which the ignition device is located are obtained.

[0023] In the present disclosure, the attribute information of the wind box may include the number of the wind boxes, the number of wind boxes in which ignition devices are located, and the air leakage rate of each of the wind boxes. sintering furnace Since each of the wind boxes in the above example is welded, leakage may occur at the weld seams. Therefore, it is necessary to obtain the air leakage rate of each of the wind boxes. In some embodiments, the air leakage rate of each of the wind boxes may be measured according to the standard YB / T 4784.1-2019 for measuring sintering air leakage rates.

[0024] In the present disclosure, the sintering flue gas parameters of the wind box may include parameters such as the unit flow rate of the sintering flue gas of the wind box, the temperature of the sintering flue gas of the wind box, the air pressure of the sintering flue gas of the wind box, the CO concentration of the sintering flue gas of the wind box, and the CO concentration of the sintering flue gas of the wind box.

[0025] In this disclosure, the operating parameters include: sintering furnace The parameters may include the unit material supply amount in the mixed material, the fuel blending ratio in the mixed material, the fuel moisture content, the estimated unit production amount of sintered ore, and the remaining carbon amount of sintered ore.

[0026] In this disclosure, sintering furnace Attribute information of each wind box in sintering furnaceWhen the operating parameters and sintering flue gas parameters of each wind box are obtained, a first calculation module can calculate the amount of oxygen required to combust fuel in each wind box based on the attribute information, the operating parameters, and the sintering flue gas parameters. A second calculation module can calculate the actual amount of oxygen supplied to combust fuel in each wind box based on the attribute information, the operating parameters, and the sintering flue gas parameters. An excess oxygen coefficient for each wind box can be calculated based on the required amount of oxygen and the actual amount of oxygen. The proportion between the actual amount of oxygen and the required amount of oxygen is the excess oxygen coefficient. When the excess oxygen coefficient is obtained, the excess oxygen coefficient can be used to intuitively and quantitatively determine the oxygen surplus during fuel combustion, ensuring smooth sintering and production.

[0027] In some embodiments, the first calculation module: JPEG2025538744000064.jpg15170, among which OC i is the amount of oxygen required to burn fuel in the sintered material layer corresponding to the i-th wind box, j is the number of wind boxes in which the ignition device is located, and n ... and n is the amount of oxygen required to burn fuel in the sintered material layer corresponding to the i-th wind box. sintering furnace is the total number of wind boxes in the i is the amount of fuel consumed by the sintered material layer corresponding to the i-th wind box, and Csf is the fuel unchanged carbon content.

[0028] What needs explanation is OC i is the amount of oxygen required to completely burn the fuel in the sintered material layer corresponding to the i-th wind box.

[0029] In this disclosure, sintering furnace Attribute information of each wind box in sintering furnace When the operation parameters and the sintering flue gas parameters of each wind box are obtained, the first calculation module can calculate the amount of oxygen required to burn fuel in the sintering material layer corresponding to each wind box. In the first calculation module, j is the number of wind boxes where the ignition device is located, and i is the number of the i-th wind box. box (In the expression of the formulas according to the present disclosure, the i-th wind box is taken as an example.) It means , n is sintering furnace is the total number of wind boxes, and gSF i is the amount of fuel consumed by the sintering material layer corresponding to the i-th wind box (i.e., the amount of fuel consumed when sintering the sintering material layer corresponding to the i-th wind box), and Csf is the fuel constant carbon content (the carbon content of the fuel in the sintering material layer when sintering the sintering material layers corresponding to all wind boxes).

[0030] In some embodiments, the gSF i The calculation formula is: JPEG2025538744000065.jpg21170JPEG2025538744000066.jpg40170

[0031] In the present disclosure, the first calculation module includes gSF i is the amount of fuel consumed by the sintered material layer corresponding to the ith wind box, and gSF i In some embodiments, it may be necessary to calculate the gSF. In some embodiments, it may be necessary to obtain the sintering flue gas parameters for each of the wind boxes. The sintering flue gas parameters may include the unit flow rate of the sintering flue gas for the i-th wind box, the temperature of the sintering flue gas for the i-th wind box, the air pressure of the sintering flue gas for the i-th wind box, the CO concentration of the sintering flue gas for the i-th wind box, and the CO2 concentration of the sintering flue gas for the i-th wind box. It may also be necessary to obtain the local atmospheric pressure, the total amount of CO2 produced by burning fuel, and the total amount of CO2 in the sintering flue gas. i The amount of fuel consumed by the sintered material layer corresponding to the i-th wind box is calculated using the formula:

[0032] In some embodiments, the formula for calculating gCO2sf is: JPEG2025538744000067.jpg37170

[0033] In the present disclosure, the amount of fuel consumed by the sintered material layer corresponding to the i-th wind box is defined as gSF. iIn some embodiments, it is necessary to calculate the total amount of CO2 produced by burning the fuel, gCO2sf. sintering furnace It is necessary to obtain the following operational parameters. sintering furnace The parameters may include the unit material supply amount, the fuel blending ratio in the mixed material, the fuel moisture content, the estimated unit production amount of sintered ore, and the remaining carbon amount of sintered ore. sintering furnace Calculate the total amount of CO2 (gCO2sf) produced by burning fuel in the sintered material layers corresponding to all wind boxes in the table.

[0034] In some embodiments, the formula for calculating gCO2T is JPEG2025538744000068.jpg14170

[0035] In the present disclosure, the amount of fuel consumed by the sintered material layer corresponding to the i-th wind box is defined as gSF. i When calculating, sintering furnace It is necessary to calculate the total amount of CO2 gCO2T of the sintering flue gas of all wind boxes in the i-th wind box. In some embodiments, the unit flow rate of the sintering flue gas of the i-th wind box, the temperature of the sintering flue gas of the i-th wind box, the atmospheric pressure of the sintering flue gas of the i-th wind box, the CO concentration of the sintering flue gas of the i-th wind box, and the CO2 concentration of the sintering flue gas of the i-th wind box are obtained, and then the total amount of CO2 gCO2T of the sintering flue gas is calculated by the above formula: sintering furnace Calculate the total amount of CO2 in the sinter flue gas of all wind boxes in gCO2T.

[0036] In some embodiments, the second calculation module: JPEG2025538744000069.jpg9170JPEG2025538744000070.jpg21170JPEG2025538744000071.jpg11170

[0037] In the present disclosure, when the excess oxygen coefficient for burning fuel in the sintered material layer corresponding to each wind box is obtained as needed, it is necessary to calculate the actual amount of oxygen supplied for burning fuel in the sintered material layer corresponding to each wind box. Taking the i-th wind box as an example, when calculating the actual amount of oxygen supplied for burning fuel in the sintered material layer corresponding to the i-th wind box, the amount of oxygen consumed by burning fuel and reducing iron oxide in the sintered material layer corresponding to the i-th wind box, the O2 unit generation amount of the i-th wind box, and the amount of oxygen brought in due to air leakage in the i-th wind box (i.e., the amount of oxygen gas brought in due to air leakage in the wind box) are obtained, and then the actual amount of oxygen OA supplied for burning fuel in the sintered material layer corresponding to the i-th wind box is calculated by the second calculation module. i It will be necessary to calculate

[0038] In some embodiments, the OSF i The calculation formula is JPEG2025538744000072.jpg16170

[0039] In the present disclosure, the actual amount of oxygen OA supplied by the second calculation module for burning fuel in the sintered material layer corresponding to the i-th wind box is calculated. i When calculating the amount of oxygen consumed by burning fuel and reducing iron oxide in the sintered material layer corresponding to the i-th wind box, i In some embodiments, the unit flow rate of the sintering flue gas of the i-th wind box, the temperature of the sintering flue gas of the i-th wind box, the air pressure of the sintering flue gas of the i-th wind box, the CO concentration of the sintering flue gas of the i-th wind box, and the CO concentration of the sintering flue gas of the i-th wind box are obtained, and the OSF i It is necessary to calculate the amount of oxygen OSFi consumed by burning fuel and reducing iron oxide in the sintered material layer corresponding to the i-th wind box using the calculation formula.

[0040] JPEG2025538744000073.jpg60170

[0041] JPEG2025538744000074.jpg33170JPEG2025538744000075.jpg33170

[0042] In some embodiments, when calculating an excess oxygen coefficient for burning fuel in a sintered material layer corresponding to each of the wind boxes based on the required oxygen amount and the actual oxygen amount, the calculation formula for the excess oxygen coefficient is: JPEG2025538744000076.jpg14170, among which Oe i is the excess oxygen coefficient for burning fuel in the sintered material layer corresponding to the i-th wind box.

[0043] In the present disclosure, when the required amount of oxygen and the actual amount of oxygen for burning fuel in the sintered material layer corresponding to the i-th wind box are calculated, the following is performed based on the required amount of oxygen and the actual amount of oxygen: before After calculating the excess oxygen coefficient for burning fuel in the sintering material layer corresponding to the i-th wind box, the excess oxygen coefficient can be used to intuitively and accurately understand the state of burning fuel in the sintering material layer corresponding to the i-th wind box, and can thus quantitatively understand the oxygen surplus during the fuel combustion process, thereby ensuring smooth sintering and production.

[0044] In this disclosure, the calculations above have been carried out using the i-th wind chest as an example, but in actual production, sintering furnace According to the actual conditions of the wind box in the present disclosure, the values ​​of each parameter can be taken or calculated, and there is no particular limitation thereon in the present disclosure.

[0045] Hereinafter, embodiments of the present disclosure will be described based on examples, but the embodiments of the present disclosure are not limited to the following examples.

[0046] In one embodiment of the present disclosure, the measured sintering furnace of Cross-sectional areais 500m 2 The total number of wind boxes is 27, and the number of ignition devices is Located The windboxes are the first to third windboxes (the ignition devices are located in the three windboxes at the front, first The measured wind box is the fourth wind box. That is, the first wind box measured is the fourth wind box. ). Measured sintering furnace The unit material supply rate is 1050t / h, the fuel blending rate in the mixed material is 3.5%, and the fuel moisture content is Content The carbon content of the fuel is 9.0%, the carbon content of the fuel is 80%, the estimated production rate of the sintered ore unit is 900t / h, and the carbon content of the sintered ore is 0.015%. The measured data of the sintered flue gas parameters of each wind box and the air leakage rate of each wind box are listed in Table 1 below.

[0047] [Table 1]

[0048] According to the excess oxygen coefficient calculation formula, the excess oxygen coefficient for burning fuel in the sintered material layer corresponding to different wind boxes can be calculated as shown in Table 2 below.

[0049] [Table 2] JPEG2025538744000079.jpg87170

[0050] In some embodiments, the measured sintering furnace When the excess oxygen coefficient for burning fuel in the sintering material layer corresponding to each wind box is calculated, the excess oxygen coefficient can be calculated intuitively and quantitatively based on the excess oxygen coefficient, and the excess oxygen level during the fuel combustion process can be adjusted to ensure smooth sintering and production, thereby improving the quality of sintered ore.

[0051] The following describes an example of an apparatus according to the present disclosure, which is used to perform the method for calculating the sintering furnace excess oxygen coefficient according to the above-described example of the present disclosure. For details not disclosed in the example of the apparatus according to the present disclosure, please refer to the example of the method for calculating the sintering furnace excess oxygen coefficient according to the above-described example of the present disclosure.

[0052] FIG. 3 is a block diagram showing the configuration of a calculation device for a sintering furnace excess oxygen coefficient according to an embodiment of the present application.

[0053] 3, a sintering furnace excess oxygen coefficient calculation device according to an embodiment of the present disclosure is shown. The sintering furnace excess oxygen coefficient calculation device may include an obtaining means 301, a first calculating means 302, a second calculating means 303 and a third calculating means 304.

[0054] The acquiring means 301 is for acquiring the attribute information of each wind box in the sintering furnace, the operation parameters of the sintering furnace, and the sintering flue gas parameters of each wind box.

[0055] The first calculation means 302 is for calculating the amount of oxygen required to combust fuel in each of the windboxes through a first calculation module based on the attribute information, the operation parameters and the sintering flue gas parameters. The second calculation means 303 is for calculating the actual amount of oxygen to be supplied for burning fuel in each wind box by a second calculation module based on the attribute information, the operation parameters and the sintering flue gas parameters. The third calculation means 304 is for calculating the excess oxygen coefficient of each of the wind boxes based on the required oxygen amount and the actual oxygen amount.

[0056] It should be noted that although some modules or means in the apparatus for performing the above-mentioned operations have been described in detail, such classification is not intended to be limiting. In fact, according to embodiments of the present disclosure, the features and functions of two or more modules or means described above may be detailed as a single module or means. Conversely, the features and functions of one module or means described above may be further detailed as being divided into multiple modules or means.

[0057] 4 is a flowchart illustrating a sintering control method according to some embodiments of the present disclosure. Referring to FIG. 3, the sintering control method may include the following steps 401 to 406. Step 401 is sintering furnace attribute information of each wind box other than the wind box in which the ignition device is located; sintering furnace The operating parameters and sintering flue gas parameters of each wind box are obtained. Step 402: calculates the amount of oxygen required to burn fuel in the sintering material layer corresponding to each wind box by a first calculation module based on the attribute information, the operation parameters and the sintering flue gas parameters. Step 403: calculates the actual amount of oxygen to be supplied to combust fuel in the sintering material layer corresponding to each wind box by a second calculation module based on the attribute information, the operation parameters and the sintering flue gas parameters. Step 404 calculates an excess oxygen coefficient for burning fuel in the sintered material layer corresponding to each wind box based on the required oxygen amount and the actual oxygen amount. Step 405 determines the theoretical minimum oxygen requirement of the combustion support gas at the sinter surface corresponding to each wind box based on the excess oxygen coefficient. Step 406 performs low-oxygen sintering and oxygen-starved cooling based on the theoretical minimum oxygen requirement.

[0058] In the present disclosure, when obtaining the attribute information of each wind box and the sintering flue gas parameters of each wind box, first: sintering furnace According to the total number of wind boxes, sintering furnace Sort out the sintering furnace When sorting, sintering furnace Assuming that the total number of wind-chests is 27, sintering furnace If we exclude the number of wind boxes in which the ignition device is located (assuming that the number of wind boxes in which the ignition device is located is three), the remaining number of wind boxes is as follows: sintering furnace After sorting into 24 minutes, sintering furnace The attribute information and sintering flue gas parameters of each wind box other than the wind box where the ignition device is located are obtained.

[0059] In the present disclosure, the attribute information of the wind box may include the number of wind boxes, the number of wind boxes in which ignition devices are located, and the air leakage rate of each wind box. sintering furnace Since the wind boxes in the present invention are welded together, air leakage may occur at the weld seams. Therefore, it is necessary to obtain the air leakage rate of each wind box. In some embodiments, the air leakage rate of each wind box can be measured according to the standard YB / T 4784.1-2019 for measuring sintering air leakage rates.

[0060] In the present disclosure, the windbox sintering flue gas parameters may include parameters such as the unit flow rate of the windbox sintering flue gas, the temperature of the windbox sintering flue gas, the air pressure of the windbox sintering flue gas, the CO concentration of the windbox sintering flue gas, and the CO concentration of the windbox sintering flue gas.

[0061] In this disclosure, sintering furnace The operating parameters of sintering furnace The parameters may include the unit material supply amount, the fuel blending ratio in the mixed material, the fuel moisture content, the estimated unit production amount of sintered ore, and the remaining carbon amount of sintered ore.

[0062] In this disclosure, sintering furnace Attribute information of each wind box in sintering furnaceWhen the operating parameters and the sintering flue gas parameters of each wind box are obtained, a first calculation module calculates the amount of oxygen required to burn fuel in the sintering material layer corresponding to each wind box based on the attribute information, operating parameters, and sintering flue gas parameters. A second calculation module calculates the actual amount of oxygen to be supplied to burn fuel in the sintering material layer corresponding to each wind box based on the attribute information, operating parameters, and sintering flue gas parameters. An excess oxygen coefficient for each wind box can be calculated based on the required oxygen amount and the actual oxygen amount. The ratio between the actual oxygen amount and the required oxygen amount is the excess oxygen coefficient. When the excess oxygen coefficient is obtained, the excess oxygen coefficient can be used to intuitively and accurately determine the degree of excess oxygen during the fuel combustion process, ensuring smooth sintering and production.

[0063] In some embodiments, the first calculation module JPEG2025538744000080.jpg14170, among which OC i is the amount of oxygen required to burn fuel in the sintered material layer corresponding to the i-th wind box, j is the number of wind boxes in which the ignition device is located, and n is sintering furnace is the total number of wind boxes, and gSF i is the amount of fuel consumed by the sintered material layer corresponding to the i-th wind box, and Csf is the fuel unchanged carbon content.

[0064] What needs explanation is OC i is the amount of oxygen required to completely burn the fuel in the sintered material layer corresponding to the i-th wind box.

[0065] In this disclosure, sintering furnace Attribute information of each wind box in sintering furnaceWhen the operation parameters and the sintering flue gas parameters of each wind box are obtained, the first calculation module calculates the amount of oxygen required to burn fuel in the sintering material layer corresponding to each wind box. In the first calculation module, j is the number of wind boxes where the ignition device is located, i is the ith wind box (the ith wind box is shown as an example in the formula of the present disclosure), and n is sintering furnace is the total number of wind boxes, and gSF i is the amount of fuel consumed by the sintering material layer corresponding to the i-th wind box (i.e., the amount of fuel consumed by the sintering material layer corresponding to the i-th wind box during sintering), and Csf is the fuel constant carbon content (the sintering material layers corresponding to all wind boxes are the carbon content of the fuel in the sintering material layer during sintering).

[0066] In some embodiments, the gSF i The calculation formula is JPEG2025538744000081.jpg21170JPEG2025538744000082.jpg40170

[0067] In the present disclosure, the first calculation module includes gSF i is the amount of fuel consumed by the sintered material layer corresponding to the i-th wind box, i In some embodiments, it is necessary to obtain sintering flue gas parameters for each wind box. The sintering flue gas parameters include the unit flow rate of the sintering flue gas for the i-th wind box, the temperature of the sintering flue gas for the i-th wind box, the air pressure of the sintering flue gas for the i-th wind box, the CO concentration of the sintering flue gas for the i-th wind box, and the CO2 concentration of the sintering flue gas for the i-th wind box. In addition, the local atmospheric pressure, the total amount of CO2 generated by burning fuel, and the total amount of CO2 in the sintering flue gas are obtained, and then the gSF i It is necessary to calculate the amount of fuel consumed by the sintered material layer corresponding to the i-th wind box using the calculation formula:

[0068] In some embodiments, the formula for calculating gCO2sf is JPEG2025538744000083.jpg37170

[0069] In the present disclosure, the amount of fuel consumed by the sintered material layer corresponding to the i-th wind box is gSF i In some embodiments, it is necessary to calculate the total amount of CO produced by burning the fuel, gCO2sf. sintering furnace It is necessary to obtain the following operational parameters. sintering furnace The parameters may include the unit material supply amount, the fuel blending ratio in the mixed material, the fuel moisture content, the estimated unit production amount of sintered ore, and the remaining carbon amount of sintered ore. sintering furnace Calculate the total amount of CO2 (gCO2sf) produced by burning fuel in the sintered material layers corresponding to all wind boxes in the table.

[0070] In some embodiments, the formula for calculating gCO2T is JPEG2025538744000084.jpg15170

[0071] In the present disclosure, the amount of fuel consumed by the sintered material layer corresponding to the i-th wind box is gSF i When calculating, sintering furnace It is necessary to calculate the total amount of CO2 gCO2T in the sintering flue gas of all wind boxes in the i-th wind box. In some embodiments, the unit flow rate of the sintering flue gas of the i-th wind box, the temperature of the sintering flue gas of the i-th wind box, the atmospheric pressure of the sintering flue gas of the i-th wind box, the CO concentration of the sintering flue gas of the i-th wind box, and the CO2 concentration of the sintering flue gas of the i-th wind box are obtained, and then the total amount of CO2 gCO2T in the sintering flue gas is calculated using the above formula: sintering furnace The total amount of CO2 in the sinter flue gas of all windboxes in gCO2T can be calculated.

[0072] In some embodiments, the second calculation module JPEG2025538744000085.jpg44170

[0073] In the present disclosure, when calculating the excess oxygen coefficient for burning fuel in the sintered material layer corresponding to each wind box as needed, it is necessary to calculate the actual amount of oxygen supplied for burning fuel in the sintered material layer corresponding to each wind box. Taking the i-th wind box as an example, when calculating the actual amount of oxygen supplied for burning fuel in the sintered material layer corresponding to the i-th wind box, the amount of oxygen consumed by burning fuel and reducing iron oxide in the sintered material layer corresponding to the i-th wind box, the O2 unit generation amount of the i-th wind box, and the amount of oxygen brought in due to air leakage in the i-th wind box (i.e., the amount of oxygen gas taken in due to air leakage in the wind box) are obtained, and then the second calculation module calculates the actual amount of oxygen OA supplied for burning fuel in the sintered material layer corresponding to the i-th wind box. i It will be necessary to calculate

[0074] In some embodiments, the OSF i The calculation formula is JPEG2025538744000086.jpg15170

[0075] In the present disclosure, the second calculation module calculates the actual amount of oxygen OA supplied for burning fuel in the sintered material layer corresponding to the i-th wind box. i When calculating the amount of oxygen consumed by burning fuel and reducing iron oxide in the sintered material layer corresponding to the i-th wind box, i In some embodiments, the unit flow rate of the sintering flue gas of the i-th wind box, the temperature of the sintering flue gas of the i-th wind box, the air pressure of the sintering flue gas of the i-th wind box, the CO concentration of the sintering flue gas of the i-th wind box, and the CO concentration of the sintering flue gas of the i-th wind box are obtained, and then the OSF i The amount of oxygen consumed by burning fuel and reducing iron oxide in the sintered material layer corresponding to the i-th wind box is calculated using the formula: i Calculate.

[0076] JPEG2025538744000087.jpg59170

[0077] JPEG2025538744000088.jpg68170

[0078] In some embodiments, when calculating an excess oxygen coefficient for burning fuel in the sintered material layer corresponding to each wind box based on the required oxygen amount and the actual oxygen amount, the formula for calculating the excess oxygen coefficient is: JPEG2025538744000089.jpg15170, among which Oe i is the excess oxygen coefficient for burning fuel in the sintered material layer corresponding to the i-th wind box.

[0079] In the present disclosure, when the required amount of oxygen and the actual amount of oxygen for burning fuel in the sintered material layer corresponding to the i-th wind box are calculated, the following is performed based on the required amount of oxygen and the actual amount of oxygen: No. After calculating the excess oxygen coefficient for burning fuel in the sintering material layer corresponding to the i-th wind box, the state of burning fuel in the sintering material layer corresponding to the i-th wind box can be intuitively and accurately understood based on the excess oxygen coefficient, and the oxygen surplus during the fuel burning process can be quantitatively considered to ensure smooth sintering and production.

[0080] In this disclosure, the calculations above are all based on the i-th wind box as an example. However, in actual production, sintering furnace The values ​​of each parameter can be calculated or taken according to the actual conditions of the wind box, and there is no particular limitation thereto in the present disclosure.

[0081] It can be understood that when the excess oxygen coefficient is calculated, the theoretical minimum required oxygen amount of the combustion support gas at the sintering material surface corresponding to each wind box can be determined based on the excess oxygen coefficient for burning fuel in the sintering material layer corresponding to each wind box, and then low-oxygen sintering and oxygen-deficient cooling can be performed based on the theoretical minimum required oxygen amount.

[0082] In some embodiments, the formula for calculating the theoretical minimum oxygen requirement is JPEG2025538744000090.jpg23170Of which, O2sT i is the theoretical minimum required oxygen content of the combustion support gas at the sinter surface corresponding to the i-th wind box, and tO R is the total amount of oxygen loss due to the reduction of iron oxide, Ti is the temperature of the combustion support gas at the sinter surface corresponding to the i-th wind box, and NQS i is the unit air volume of the combustion auxiliary gas at the sinter surface corresponding to the i-th wind box, and α(T i ) is a correction coefficient for correcting the theoretical minimum required oxygen amount of the combustion supporting gas at the sinter surface corresponding to the i-th wind box according to Ti.

[0083] In some embodiments, the theoretical minimum required oxygen amount of the combustion supporting gas at the sintering material surface corresponding to the i-th wind box is T i The correction coefficient for correcting the amount of oxygen required according to the above formula may be in the range of 0.25 to 1. In this way, the theoretical minimum required amount of oxygen calculated becomes more accurate.

[0084] Using the formula for calculating the theoretical minimum required oxygen amount, the theoretical minimum required oxygen amount of the combustion auxiliary gas at the sinter surface corresponding to each wind box can be calculated as shown in Table 3 below.

[0085] [Table 3]

[0086] When the theoretical minimum required oxygen amount of the combustion-assisting gas at the sintering material surface corresponding to each wind box is calculated, a low-oxygen sintering process or an oxygen-deficient cooling process can be performed based on the theoretical minimum required oxygen amount.

[0087] In some embodiments, low-oxygen sintering can be performed on a sintering material layer where the sintering material surface is associated with a combustion-assisting gas whose theoretical minimum oxygen requirement is within a first predetermined range, while oxygen-deficient cooling can be performed on a sintering material layer where the sintering material surface is associated with a combustion-assisting gas whose theoretical minimum oxygen requirement is within a second predetermined range, where the first predetermined range is 17% to 21% and the second predetermined range is 0% to 15%.

[0088] Fig. 5 is a schematic diagram showing the process of the sintering control method in Fig. 4. As shown in Fig. 5, when the oxygen content of the combustion auxiliary gas is 17% to 21%, low-oxygen sintering is performed on the sintered material layer where the sintered material surface corresponding to this combustion auxiliary gas is located, while when the oxygen content of the combustion auxiliary gas is lower than 15%, oxygen-deficient cooling is performed on the sintered material layer where the sintered material surface corresponding to this combustion auxiliary gas is located.

[0089] By implementing low-oxygen sintering and oxygen-deficient cooling at specific locations in the sintering process, the emission of pollutants can be effectively reduced and the quality of sinter can be improved.

[0090] 6 is a block diagram showing the configuration of a sintering control device according to some embodiments of the present disclosure. As shown in FIG. 6, the sintering control device may include an acquisition means 601, a first calculation means 602, a second calculation means 603, a third calculation means 604, a fourth calculation means 605, and a sintering / cooling means 606. Among them, the acquisition means 601 sintering furnace Attribute information of each wind box in sintering furnaceThe first calculation means 602 calculates the amount of oxygen required to combust fuel in the sintering material layer corresponding to each wind box using a first calculation module based on the attribute information, the operation parameters, and the sintering flue gas parameters. The second calculation means 603 calculates the actual amount of oxygen supplied to combust fuel in the sintering material layer corresponding to each wind box using a second calculation module based on the attribute information, the operation parameters, and the sintering flue gas parameters. The third calculation means 604 calculates the excess oxygen coefficient for combusting fuel in the sintering material layer corresponding to each wind box based on the required oxygen amount and the actual oxygen amount. The fourth calculation means 605 determines the theoretical minimum required oxygen amount of the combustion auxiliary gas in the sintering material layer corresponding to each wind box based on the excess oxygen coefficient. The sintering / cooling means 606 performs low-oxygen sintering and oxygen-deficient cooling based on the theoretical minimum required oxygen amount.

[0091] Based on the same idea, the present disclosure further provides a sintering control device, which includes a processor and a memory, and has computer program code stored in the memory, which, when executed by the processor, causes the processor to perform one or more embodiments of the sintering control method according to the present disclosure.

[0092] From the above technical solutions, it can be seen that the present disclosure has at least several advantages and positive effects as follows: First, the technical solution proposed in this disclosure can solve the problem of being unable to measure and calculate the excess oxygen coefficient at different sintering stages. Based on the calculated excess oxygen coefficient, the oxygen surplus during the fuel combustion process can be intuitively and quantitatively considered, and smooth sintering can be achieved while ensuring the improvement of sinter quality. Second, the technical solution proposed in this disclosure can intuitively and accurately reflect the state of fuel burning in the sintered material layer, and has the advantages of being easy to operate, easy to perform the measurement, and accurate results. Third, the technical solution proposed in this disclosure can be adapted to different conditions of the sintering production process, and has extremely high application value and good development prospects.

[0093] While the present disclosure has been described with reference to several exemplary embodiments, it is to be understood that the terms used are for the purposes of description and illustration, and not of limitation. The present disclosure may be embodied in various forms without departing from the spirit and substance of the disclosure, and it is to be understood that the present disclosure should not be limited to any of the details set forth above with respect to the above-described embodiments, but should be broadly interpreted in spirit and scope as defined by the appended claims. Accordingly, all changes and modifications that come within the scope of the appended claims and their equivalents are to be embraced within the scope of the appended claims.

Claims

1. Obtaining attribute information of each wind box in a sintering furnace, operation parameters of the sintering furnace and sintering flue gas parameters of each wind box; calculating, by a first calculation module, an amount of oxygen required for burning fuel in each windbox based on the attribute information, the operation parameters, and the sintering flue gas parameters; Calculating an actual amount of oxygen to be supplied for burning fuel in each of the windboxes by a second calculation module based on the attribute information, the operation parameters, and the sintering flue gas parameters; and calculating an excess oxygen coefficient for each of the wind boxes based on the required oxygen amount and the actual oxygen amount.

2. Obtaining attribute information of each wind box other than the wind box in which the ignition device is located in the sintering apparatus, operation parameters of the sintering apparatus, and sintering flue gas parameters of each wind box; calculating, by a first calculation module, an amount of oxygen required for burning fuel in the sintering material layer corresponding to each of the wind boxes based on the attribute information, the operation parameters, and the sintering flue gas parameters; calculating an actual amount of oxygen to be supplied for burning fuel in the sintering material layer corresponding to each of the wind boxes through a second calculation module based on the attribute information, the operation parameters and the sintering flue gas parameters; calculating an excess oxygen coefficient for burning fuel in the sintered material layer corresponding to each of the wind boxes based on the required oxygen amount and the actual oxygen amount; Identifying the theoretical minimum required oxygen amount of the combustion supporting gas at the sinter surface corresponding to each of the wind boxes based on the excess oxygen coefficient; and and performing low-oxygen sintering and oxygen-deficient cooling based on the theoretical minimum required oxygen amount.

3. The first calculation module: O.C. ｉ is the amount of oxygen required to combust the fuel in the sintered material layer corresponding to the i-th wind box, j is the number of wind-chests in which the ignition device is located, n is the total number of wind boxes in the sintering apparatus; gSF ｉ is the amount of fuel consumed by the sintered material layer corresponding to the i-th wind box, 3. The method of claim 2, wherein Csf is the fuel unchanged carbon content.

4. The gSF ｉ The calculation formula is: Q ｉ is the unit flow rate of sintering flue gas in the i-th wind box; T ｉ is the temperature of the sintering flue gas in the i-th wind box; P ａ is the local atmospheric pressure, P ｉ is the atmospheric pressure of the sintering flue gas in the ith wind box, Co ｉ is the CO concentration of the sintering flue gas of the i-th wind box; gCO ２ sf is the CO produced by burning fuel in the sintered material layer corresponding to all wind boxes. ２ The total amount is gCO ２ T is the CO in the sintering flue gas of all windboxes ２ 4. The method of claim 3, wherein the total amount is

5. gCO ２ The formula for calculating sf is: Rsf is the fuel blending ratio in the mixture; Msf is the fuel moisture content; gSt is the estimated production volume per unit of sinter, 5. The method of claim 4, wherein Cst is the carbon balance of the sinter.

6. gCO ２ The formula for calculating T is:

7. The second calculation module: Office Automation ｉ is the actual amount of oxygen supplied to burn fuel in the sintered material layer corresponding to the i-th wind box; OSF ｉ is the amount of oxygen consumed by burning fuel and reducing iron oxide in the sintered material layer corresponding to the i-th wind box; gO ２ L ｉ 7. The method of claim 6, wherein Θ is the amount of oxygen introduced by an air leak in the i-th wind box.

8. The OSF ｉ The calculation formula is:

9.

10. The formula for calculating the excess oxygen coefficient is: Oe ｉ 10. The method of claim 9, wherein i is the excess oxygen coefficient for burning fuel in the sintered material layer corresponding to the i-th wind box.

11. The formula for calculating the theoretical minimum required oxygen amount is: O ２ sT ｉ is the theoretical minimum required oxygen amount of the combustion assist gas at the sintering material surface corresponding to the i-th wind box, tO Ｒ is the total oxygen loss due to the reduction of iron oxide, T ｉ is the temperature of the combustion assist gas at the sintering material surface corresponding to the i-th wind box; NQS ｉ is the unit air volume of the combustion assist gas at the sinter surface corresponding to the i-th wind box; α (T ｉ 11. The method according to claim 10, wherein Ti is a correction coefficient for correcting the theoretical minimum required oxygen amount of the combustion supporting gas at the sintering material surface corresponding to the i-th wind box.

12. Said α(T ｉ 12. The method of claim 11, wherein ∑j=1 / 2 ...

13. Based on the theoretical minimum oxygen requirement, low-oxygen sintering and oxygen-deficient cooling are performed. low-oxygen sintering is performed on a sintering material layer where a sintering material surface corresponding to a combustion assisting gas in which the theoretical minimum required oxygen amount is within a first predetermined range is located; and The method includes: subjecting a sintering material layer, which has a sintering material surface corresponding to the combustion-assisting gas whose theoretical minimum oxygen requirement is within a second predetermined range, to oxygen-deficient cooling; 13. The method according to any one of claims 2 to 12, wherein the first predetermined range is from 17% to 21% and the second predetermined range is from 0% to 15%.

14. an acquiring means for acquiring attribute information of each wind box in a sintering furnace, operation parameters of the sintering furnace, and sintering flue gas parameters of each wind box; a first calculation means for calculating an amount of oxygen required for burning fuel in each of the windboxes through a first calculation module based on the attribute information, the operation parameters and the sintering flue gas parameters; a second calculation means for calculating an actual amount of oxygen to be supplied for burning fuel in each of the windboxes through a second calculation module based on the attribute information, the operation parameters and the sintering flue gas parameters; and a third calculation means for calculating an excess oxygen coefficient of each of the wind boxes based on the required oxygen amount and the actual oxygen amount.

15. an acquiring means for acquiring attribute information of each wind box in the sintering apparatus, operation parameters of the sintering apparatus, and sintering flue gas parameters of each wind box; a first calculation means for calculating, based on the attribute information, the operation parameters and the sintering flue gas parameters, an amount of oxygen required for burning fuel in the sintering material layer corresponding to each of the wind boxes through a first calculation module; a second calculation means for calculating an actual amount of oxygen to be supplied for burning fuel in the sintering material layer corresponding to each wind box through a second calculation module according to the attribute information, the operation parameters and the sintering flue gas parameters; a third calculation means for calculating an excess oxygen coefficient for burning fuel in the sintered material layer corresponding to each of the wind boxes based on the required oxygen amount and the actual oxygen amount; A fourth calculation means for determining the theoretical minimum required oxygen amount of the combustion assist gas at the sintering material surface corresponding to each of the wind boxes based on the excess oxygen coefficient; and a sintering / cooling means for performing low-oxygen sintering and oxygen-deficient cooling based on the theoretical minimum required oxygen amount.

16. Includes a processor and memory The memory has computer program code stored therein; A sintering control device, characterized in that the computer program code, when executed by the processor, causes the processor to carry out the method according to any one of claims 1 to 13.

Images