Blast furnace burden distribution control method and device suitable for high-proportion pellet smelting

Abstract

The invention discloses a blast furnace burden distribution control method and device suitable for high-proportion pellet smelting, and relates to the technical field of ferrous metallurgy blast furnace ironmaking. The method comprises the following steps: S1, raw material preparation and pretreatment optimization; s2, setting initial material distribution parameters; s3, furnace condition monitoring; s4, dynamic cloth adjustment; and S5, loop optimization is carried out. The system has the beneficial effects that control is accurate, and the coal gas utilization rate is increased; the furnace condition stability is enhanced; and the method has the advantages of strong specificity, wide adaptation range, high automation and intelligence degree and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel metallurgical blast furnace ironmaking, and in particular to a blast furnace burden control method and device suitable for high-proportion pellet smelting. BACKGROUND

[0002] In the blast furnace-converter long process, the carbon emissions of the blast furnace ironmaking link account for more than 70% of the whole process. Increasing the proportion of pellets in the blast furnace burden and replacing high-basicity sinter are important ways to reduce carbon emissions. However, pellets have the characteristics of strong rolling, large bulk density, and easy pulverization, which can easily lead to unstable burden surface shape, unbalanced gas flow distribution at the edge and center, and decreased coal gas utilization rate during blast furnace burdening, which may in turn increase fuel consumption and carbon emissions. The existing blast furnace burdening technology is mostly based on the burden structure design of traditional high-sinter burdening, and lacks special burden control strategies for high-proportion pellet smelting (pellet + lump ore > 50%), and cannot achieve dynamic and accurate burden control according to the characteristics of pellets and real-time furnace conditions, which restricts the promotion and application of high-proportion pellet smelting technology. Therefore, it is of great significance to develop a burden control method and device specially suitable for high-proportion pellet smelting to promote low-carbon blast furnace ironmaking. SUMMARY

[0003] The present application aims to solve the problems in the prior art and provides a blast furnace burden control method and device suitable for high-proportion pellet smelting.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical solution: a blast furnace burden control method and device suitable for high-proportion pellet smelting, which comprises the following steps: raw material preparation and pretreatment optimization: burdening of pellets, lump ore, and sinter, wherein the total proportion of pellets and lump ore is controlled at 45%-60%, and the proportion of pellets is not less than 30%; screening and drying treatment of the mixed raw materials, with the proportion of pellets with a particle size of 5-10 mm being ≥ 90%, the proportion of lump ore with a particle size of 10-25 mm being ≥ 80%, and the moisture content of the mixed material being ≤ 3%; initial burden parameter setting: selecting a preset burden matrix according to the proportion of pellets and lump ore, and setting the burden inclination angle, batch weight, and number of rounds; furnace condition monitoring: real-time monitoring of the coal gas utilization rate, static pressure difference of the blast furnace shaft, and cooling wall water temperature difference; dynamic burden adjustment: dynamically adjusting the proportion of the number of rounds of ore and coke at the edge and center and the burden inclination angle according to the comparison result of the monitored data and the preset threshold value; cycle optimization: collecting data and calculating the burden layer segregation index at a predetermined period, and adjusting the combination of batch weight and inclination angle based on the index, and updating the reference burden matrix regularly.

[0005] Further, the raw material preparation and pretreatment optimization includes proportioning design, particle size control, coke breeze addition and moisture control, specifically: proportioning design: the iron content of the pellet is ≥60%, the iron content of the lump ore is ≥58%, and the binary base of the sinter ore alkalinity should be controlled within the range of 1.8-2.2; particle size control: the proportion of the pellet with a particle size of 5-10 mm should be ≥90%, and the compressive strength of the pellet should be ≥2000N, and the pulverization rate of the pellet should be ≤5%; the proportion of the lump ore with a particle size of 10-25 mm should be ≥80%, and the lump ore can adopt secondary screening to ensure the uniformity of the furnace particle size; coke breeze addition: the particle size of the coke breeze is 10-20 mm, and the proportion of the pellet is 20-30 kg / tFe, which is mixed in advance, and the angular characteristics of the coke breeze hinder the rolling of the pellet; moisture control: the moisture of the mixed material is reduced to ≤3% through the vertical coal gas drying tower to prevent wet material adhesion from causing uneven distribution.

[0006] Further, the preset distribution matrix in the initial distribution parameter setting includes "sinter ore baffle wall + pellet centering strategy" and "edge sinter ore + center coke reinforcement strategy", specifically: adopting "sinter ore baffle wall + pellet centering" strategy: 30% of the pellet + 20% of the lump ore proportion, a small amount of sinter ore (10%-15%) is distributed in the edge (39°-41°) and center (30°-32°) position to form a physical baffle wall; the pellet and coke breeze mixed material is distributed in the middle position (34°-38°). The "edge sinter ore + center coke reinforcement" strategy: 40% pellet or more proportion, sinter ore is concentrated in the edge position (39°-41°) to suppress the rolling of the pellet; 1-3 circles of coke are added in the center area (30°-32°) to form a center "air flow corridor".

[0007] Further, the furnace condition monitoring includes air flow stability monitoring, burden segregation monitoring and heat load protection: air flow stability monitoring: the gas utilization rate ηCO = CO2 / (CO+CO2) is calculated in real time through the top gas analysis. When ηCO<46%, it is determined that the edge air flow is too strong, and the "reduce ore and increase coke" instruction is triggered: the edge ore circle number is reduced by one, and the edge coke circle number is increased by one. Burden segregation monitoring: the differential pressure fluctuation is detected by the static pressure sensor group. When the fluctuation is >±5kPa or the pellet pulverization rate is >5%, the "suppress the edge" mode is started: the edge ore circle is increased by one, and the edge coke circle is reduced by one, wherein the static pressure sensor group is provided in multiple groups, and each 3m along the height direction of the furnace body is provided with one group. Circulating optimization heat load protection: when the cooling wall water temperature difference is >4.0℃, the "center dredging" strategy is executed: the center coke circle is increased by one, and the high temperature area distribution angle is adjusted downward by 0.5°-1.0° as a whole.

[0008] Furthermore, the cyclic optimization specifically involves updating the fabric matrix based on real-time data on an hourly basis: collecting ηCO, static pressure difference, and water temperature difference data, calculating the segregation index of the material layer, which is calculated as: SI = (Dmax - Dmin) / Davg); if SI > 0.25, initiating batch weight-tilt angle linkage adjustment: large batch weights (>50 tons) are matched with small tilt angles (32°-35°), and small batch weights (40-45 tons) are matched with large tilt angles (38°-41°). A fabric optimization report is generated every 24 hours, automatically updating the baseline matrix in the database. Where Dmax is the depth of the highest point of the material surface, Dmin is the depth of the lowest point of the material surface, and Davg is the average material layer thickness.

[0009] A blast furnace charging control device suitable for high-proportion pellet smelting includes: a raw material pretreatment unit, including a screening machine for controlling the particle size of the raw materials and a vertical drying tower for controlling the moisture content of the raw materials; the screening machine is a double-layer vibrating screen that removes oversized particles and powder, ensuring that the proportion of pellets with a particle size of 5-10mm entering the furnace is ≥90%, and the proportion of lump ore with a particle size of 10-25mm is ≥80%, wherein the upper screen aperture of the pellet screen is 10mm and the lower screen aperture is 5mm, and the upper screen aperture of the lump ore screen is 25mm and the lower screen aperture is 10mm; the vertical drying tower has a hot air temperature of 150-200℃, controls the moisture content to ≤3%, and preheats to 80-100℃ to reduce thermal shock inside the furnace. The fabric feeding actuator includes a rotary fabric feeder for controlling the fabric inclination angle, a material flow regulating valve for controlling the material flow rate, and an online weighing system for real-time weighing; the intelligent monitoring system includes a furnace top gas analyzer for analyzing the composition of the gas, a static pressure sensor group arranged in the furnace body, a water temperature difference sensor for monitoring the cooling wall, and a three-dimensional fabric scanner for scanning the shape of the material surface; the central control system is electrically connected to the fabric feeding actuator and the intelligent monitoring system, for receiving monitoring data, having a built-in fabric parameter database and optimization algorithm, and outputting control commands to drive the fabric feeding actuator to operate.

[0010] Furthermore, the fabric tilt angle control accuracy of the rotating fabric spreader is ±0.1, and the weighing error of the online weighing system is ±0.5t.

[0011] After adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0012] 1. Precise control to improve gas utilization: Through a dynamic feeding strategy that adapts to the characteristics of high-proportion pellets and a real-time feedback mechanism, the gas utilization rate (η_CO) is steadily increased by 1.5%-2.5%, and can reach a maximum of over 48.6%, effectively reducing fuel ratio and CO2 emissions.

[0013] 2. Enhance furnace stability: Pretreatment and charge distribution control are implemented to address the characteristics of pellets being prone to rolling and pulverization, significantly reducing airflow fluctuations and charge segregation, lowering the blast furnace shutdown rate to below 0.2%, and ensuring long-term stable operation.

[0014] 3. Highly specialized and widely adaptable: Designed specifically for smelting scenarios with a pellet + lump ore ratio of 50% or more, it provides a complete solution from raw material pretreatment to charge distribution decisions, and can be flexibly adjusted according to different ratios and furnace conditions.

[0015] 4. High degree of automation and intelligence: It integrates advanced monitoring equipment and intelligent algorithms to realize automatic optimization and control of the fabric laying process, greatly reducing reliance on manual experience and improving control accuracy and production efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the blast furnace charging control device of the present invention.

[0018] Figure 2 This is a flowchart of the blast furnace charging control method of the present invention.

[0019] Figure 3 A schematic diagram showing the fabric application patterns used for different pellet ratios. Detailed Implementation

[0020] See Figure 2 As shown, the technical solution adopted in this specific embodiment includes the following steps:

[0021] S1, Raw material preparation and pretreatment optimization: Pellet, lump ore, and sinter are batched, with the total ratio of pellets to lump ore controlled at 45%-60%, and the proportion of pellets not less than 30%; the mixed raw materials are screened and dried, controlling the proportion of pellets with a particle size of 5-10mm ≥90%, the proportion of lump ore with a particle size of 10-25mm ≥80%, and the moisture content of the mixture ≤3%; this includes proportioning design, particle size control, coke addition, and moisture control, specifically:

[0022] Mix design: The iron content of pellets should be ≥60%, the iron content of lump ore should be ≥58%, and the basicity (CaO / SiO2) of sinter should be controlled within the range of 1.8-2.2.

[0023] Particle size control: The proportion of pellets with a particle size of 5-10mm should be ≥90%, and the compressive strength of the pellets should be ≥2000N, and the pulverization rate (-5mm) of the pellets should be ≤5%; the proportion of lump ore with a particle size of 10-25mm should be ≥80%, and lump ore can be screened in two stages (pre-screening + grading screen) to ensure the uniformity of particle size entering the furnace.

[0024] Adding coke: Premix coke with 10-20mm particle size with ore pellets at a ratio of 20-30kg / tFe, and use the angular characteristics of coke to hinder the rolling of the pellets;

[0025] Moisture control: The moisture content of the mixture is reduced to ≤3% by using a vertical gas drying tower to prevent wet material from sticking together and causing uneven distribution.

[0026] S2, Initial Material Placement Parameter Settings: Based on the ratio of pellets to lump ore, select a preset material placement matrix and set the material placement angle, batch weight, and number of rings. The preset material placement matrix includes two strategies: "Sinter Retaining Wall + Pellet Centering Strategy" and "Edge Sinter + Center Coke Strengthening Strategy," specifically:

[0027] 1) Adopt the strategy of "sintered ore retaining wall + pellets in the middle": 30% pellets + 20% lump ore ratio, with a small amount of sintered ore (10%-15%) placed at the edge (39°-41°) and center (30°-32°) positions to form a physical retaining wall; the pellets and coke-butane mixture is placed in the middle position (34°-38°).

[0028] 2) "Edge sinter + center coke strengthening" strategy: with a pellet ratio of more than 40%, the sinter is concentrated in the edge position (39°-41°) to suppress the rolling of the pellets; 1-3 rings of coke are added in the center area (30°-32°) to form a central "airflow corridor".

[0029] S3, Furnace Condition Monitoring: Real-time monitoring of blast furnace gas utilization rate, furnace body static pressure difference, and cooling wall water temperature difference; including airflow stability monitoring, burden segregation monitoring, and heat load protection.

[0030] 1) Airflow stability monitoring: The gas utilization rate ηCO = CO2 / (CO+CO2) is calculated in real time through top gas analysis. When ηCO < 46%, it is determined that the edge airflow is too strong, triggering the "reduce ore and increase coke" command: the number of edge ore rings is reduced by one ring, and the number of edge coke rings is increased by one ring;

[0031] 2) Burden segregation monitoring: Pressure difference fluctuations are detected using a static pressure sensor group. When the fluctuation is > ±5 kPa or the pellet pulverization rate is > 5%, the "edge suppression" mode is activated: one ring of edge ore is added and one ring of edge coke is reduced. Multiple static pressure sensor groups are provided, and one group of static pressure sensor groups is arranged every 3m along the height of the furnace body.

[0032] 3) Heat load protection: When the temperature difference of the cooling wall water is >4.0℃, the "center guidance" strategy is implemented: the center focal ring is increased by 1 ring, and the overall material distribution angle in the high temperature zone is lowered by 0.5°-1.0° (equivalent to the material surface being moved down by 50-100mm).

[0033] S4, Dynamic Fabric Adjustment: Based on the comparison between the monitored data and the preset threshold, dynamically adjust the ratio of the number of coke rings at the edge and center and the fabric tilt angle.

[0034] S5, Cyclic Optimization: Data is collected and the material layer segregation index is calculated at predetermined intervals. Based on this index, the batch weight and tilt angle combination are adjusted in conjunction, and the baseline fabric distribution matrix is ​​updated periodically. Specifically:

[0035] The fabric matrix is ​​updated hourly based on real-time data: ηCO, static pressure difference, and water temperature difference data are collected to calculate the segregation index (SI), which is calculated as: SI = (Dmax - Dmin) / Davg. If SI > 0.25, batch weight-tilt angle linkage adjustment is initiated: large batch weights (>50 tons) are matched with small tilt angles (32°-35°), and small batch weights (40-45 tons) are matched with large tilt angles (38°-41°). A fabric optimization report is generated every 24 hours, automatically updating the baseline matrix in the database. Where Dmax is the depth of the highest point of the fabric surface, Dmin is the depth of the lowest point of the fabric surface, and Davg is the average fabric layer thickness.

[0036] See Figure 1 As shown, a blast furnace charging control device suitable for high-proportion pellet smelting, used to implement the method of any one of claims 1-5, comprises:

[0037] 1) Raw material pretreatment unit, including a screening machine for controlling the particle size of raw materials and a vertical drying tower for controlling the moisture content of raw materials;

[0038] Screening machine: Double-layer vibrating screen to remove oversized particles and powder, ensuring that the proportion of pellets with a particle size of 5-10mm is ≥90% and the proportion of lump ore with a particle size of 10-25mm is ≥80%. Among them, the upper screen hole of the pellet screen is 10mm and the lower screen hole is 5mm, and the upper screen hole of the lump ore screen is 25mm and the lower screen hole is 10mm.

[0039] Vertical drying tower: hot air temperature 150-200℃, moisture content controlled ≤3%, while preheating to 80-100℃ to reduce thermal shock inside the furnace.

[0040] 2) Fabric feeding mechanism, including a rotary fabric feeder for controlling the fabric tilt angle, a material flow regulating valve for controlling the material flow rate, and an online weighing system for real-time weighing;

[0041] 3) Intelligent monitoring system, including a furnace top gas analyzer for analyzing gas composition, a static pressure sensor group arranged in the furnace body, a water temperature difference sensor for monitoring the cooling wall, and a three-dimensional fabric scanner for scanning the shape of the material surface.

[0042] 4) The central control system is electrically connected to the fabric actuator and the intelligent monitoring system. It is used to receive monitoring data, has a built-in fabric parameter database and optimization algorithm, and outputs control commands to drive the fabric actuator to move.

[0043] More specifically, the fabric tilt angle control accuracy of the rotating fabric spreader is ±0.1, and the weighing error of the online weighing system is ±0.5t.

[0044] The following are relevant embodiments of the present invention, which can be referred to. Figure 3 As shown.

[0045] Example 1 (Pellet ratio 30%, Grade A ingredients)

[0046] Raw materials: 30% pellets (TFe≥60%, compressive strength≥2000N / piece) + 20% lump ore (TFe≥58%) + 50% sinter (basicity 1.8-2.2), coking coal addition amount 25kg / tFe.

[0047] Initial cloth matrix: Ore tilt angle / number of turns:

[0048] [35°(2),37°(3),39°(3),41°(2)]; Coke tilt angle / number of turns:

[0049] [35°(2),37°(2),39°(3),41°(3)].

[0050] During operation, the gas utilization rate η_CO was monitored to be 45.5% (below the 46% threshold). The system automatically triggered an adjustment: the number of ore rings at the 41° position was reduced by 1 (becoming 1 ring), and the number of coke rings was increased by 1 (becoming 4 rings).

[0051] The effect of this embodiment is as follows: After adjustment, η_CO increased to 48.2%, and the static pressure fluctuation of the furnace body decreased from...

[0052] The pressure dropped from ±6 kPa to ±3 kPa, resulting in a significant improvement in furnace conditions.

[0053] Example 2 (40% pellet ratio, Grade B ingredients)

[0054] Raw materials: 40% pellets + 15% lump ore + 45% sinter, with coking coal content of 25 kg / tFe.

[0055] The initial matrix adopts a "peripheral sinter + central coke strengthening" strategy: the ore is concentrated at the periphery [39°(4)], and the pellet mixture is distributed in the middle [37°(4), 34°(3)]; the coke is...

[0056] [35°(2),37°(3),39°(4)].

[0057] When the temperature difference of the cooling wall water was detected to rise to 3.5℃, the system executed "central guidance": the number of rotations of the central focal angle of 35° was increased from 2 to 3, and the overall tilt angle of all ore materials was lowered by 0.7°.

[0058] The effect of this embodiment is as follows: after adjustment, the water temperature difference decreased to 2.8℃, the central airflow was enhanced, and the CO ratio increased from 38% to 42%.

[0059] Example 3 (50% pellet ratio, grade C ingredients)

[0060] Raw materials: 50% pellets + 10% lump ore + 40% sinter, with coking coal content of 30 kg / tFe.

[0061] Initial matrix: Ore [39°(4),36°(5),32°(2)] (block ore at 32°), coke [35°(3),37°(4),39°(4)].

[0062] The system calculates the material layer segregation index SI = 0.31 (>0.25), and initiates the batch weight-tilt angle linkage adjustment: a large batch weight (58 tons) is matched with a small tilt angle (minimum 32°).

[0063] The effect of this embodiment is that after adjustment, the SI value drops to 0.18, the uniformity of the material layer is greatly improved, and the gas distribution is more reasonable.

[0064] The above embodiments demonstrate that the method and apparatus provided by the present invention can effectively adapt to the special requirements of high-proportion pellet smelting, and achieve low-carbon, high-efficiency, and stable operation of the blast furnace through precise control and dynamic optimization.

[0065] The above description is only used to illustrate the technical solution of the present invention and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention, as long as they do not depart from the spirit and scope of the technical solution of the present invention, should be covered within the scope of the claims of the present invention.

Claims

1. A method and apparatus for controlling blast furnace charging in high-proportion pellet smelting, characterized in that: It includes the following steps: S1, Raw material preparation and pretreatment optimization: Pellet, lump ore and sinter are batched, with the total ratio of pellets and lump ore controlled at 45%-60%, and the proportion of pellets not less than 30%; the mixed raw materials are screened and dried to control the proportion of pellets with a particle size of 5-10mm ≥90%, the proportion of lump ore with a particle size of 10-25mm ≥80%, and the moisture content of the mixture ≤3%; S2, Initial material placement parameter settings: Based on the ratio of pellets to lump ore, select the preset material placement matrix and set the material placement angle, batch weight, and number of loops; S3, Furnace Condition Monitoring: Real-time monitoring of blast furnace gas utilization rate, furnace body static pressure difference and cooling wall water temperature difference; S4, Dynamic Fabric Adjustment: Based on the comparison between the monitored data and the preset threshold, dynamically adjust the ratio of the number of coke rings at the edge and center and the fabric tilt angle. S5, Cyclic Optimization: Collect data and calculate the material layer segregation index at predetermined intervals, adjust the batch weight and tilt angle combination based on the index, and update the benchmark fabric matrix periodically.

2. The blast furnace charging control method and apparatus for high-proportion pellet smelting according to claim 1, characterized in that: S1 includes proportioning design, particle size control, addition of caramelized nuts, and moisture control, specifically: Mix design: The iron content of pellets should be ≥60%, the iron content of lump ore should be ≥58%, and the basicity of sinter should be controlled within the range of 1.8-2.

2. Particle size control: The proportion of pellets with a particle size of 5-10mm should be ≥90%, and the compressive strength of the pellets should be ≥2000N, and the pulverization rate of the pellets should be ≤5%; the proportion of lump ore with a particle size of 10-25mm should be ≥80%, and lump ore can be screened in two stages to ensure the uniformity of particle size entering the furnace. Adding coke: Premix coke with 10-20mm particle size with ore pellets at a ratio of 20-30kg / tFe, and use the angular characteristics of coke to hinder the rolling of the pellets; Moisture control: The moisture content of the mixture is reduced to ≤3% by using a vertical gas drying tower to prevent wet material from sticking together and causing uneven distribution.

3. The blast furnace charging control method and apparatus for high-proportion pellet smelting according to claim 1, characterized in that: The preset material distribution matrix in S2 includes a "sintered ore retaining wall + pellet centering strategy" and a "edge sintered ore + center coke strengthening strategy", specifically: 1) Adopt the strategy of "sintered ore retaining wall + pellets in the middle": 30% pellets + 20% lump ore ratio, with a small amount of sintered ore placed at the edge and center to form a physical retaining wall; pellets and coke butadiene mixture are placed in the middle. 2) "Edge sinter + center coke strengthening" strategy: 40% or more pellets are mixed in the blend, and the sinter is concentrated in the edge position to suppress the rolling of the pellets; 1-3 rings of coke are added in the center to form a central "airflow corridor".

4. The blast furnace charging control method and apparatus for high-proportion pellet smelting according to claim 1, characterized in that: The S3 includes airflow stability monitoring, furnace charge segregation monitoring, and heat load protection: 1) Airflow stability monitoring: The gas utilization rate ηCO = CO2 / (CO+CO2) is calculated in real time through the analysis of the top gas. When ηCO < 46%, it is determined that the edge airflow is too strong, triggering the "reduce ore and increase coke" command: the number of edge ore rings is reduced by one ring, and the number of edge coke rings is increased by one ring. 2) Monitoring of furnace charge segregation: The static pressure sensor group is used to detect pressure difference fluctuations. When the fluctuation is > ±5 kPa or the pellet pulverization rate is > 5%, the "edge suppression" mode is activated: one ring of edge ore is added and one ring of edge coke is reduced. There are multiple sets of static pressure sensors, and one set of static pressure sensors is arranged every 3m along the height of the furnace body. 3) Heat load protection: When the temperature difference of the cooling wall water is >4.0℃, the "center guidance" strategy is implemented: the center focal ring is increased by 1 ring, and the overall fabric angle of the high temperature zone is lowered by 0.5°-1.0°.

5. The blast furnace charging control method and apparatus for high-proportion pellet smelting according to claim 1, characterized in that: Specifically, S5 is: The fabric matrix is ​​updated based on real-time data with a 1-hour cycle: ηCO, static pressure difference, and water temperature difference data are collected, and the segregation index of the material layer is calculated. The segregation index of the material layer is calculated as follows: SI = (Dmax - Dmin) / Davg If SI>0.25, start batch weight-tilt angle linkage adjustment: large batch weight is matched with small tilt angle, small batch weight is matched with large tilt angle, and a fabric optimization report is generated every 24 hours, automatically updating the baseline matrix in the database, where Dmax is the depth of the highest point of the material surface, Dmin is the depth of the lowest point of the material surface, and Davg is the average material layer thickness.

6. A blast furnace charging control device suitable for high-proportion pelletizing in smelting, for implementing the method of any one of claims 1-5, characterized in that, include: 1) Raw material pretreatment unit, including a screening machine for controlling the particle size of raw materials and a vertical drying tower for controlling the moisture content of raw materials; Screening machine: Double-layer vibrating screen to remove oversized particles and powder, ensuring that the proportion of pellets with a particle size of 5-10mm is ≥90% and the proportion of lump ore with a particle size of 10-25mm is ≥80%. Among them, the upper screen hole of the pellet screen is 10mm and the lower screen hole is 5mm, and the upper screen hole of the lump ore screen is 25mm and the lower screen hole is 10mm. Vertical drying tower: hot air temperature 150-200℃, moisture content controlled ≤3%, while preheating to 80-100℃ to reduce thermal shock inside the furnace. 2) Fabric feeding mechanism, including a rotary fabric feeder for controlling the fabric tilt angle, a material flow regulating valve for controlling the material flow rate, and an online weighing system for real-time weighing; 3) Intelligent monitoring system, including a furnace top gas analyzer for analyzing gas composition, a static pressure sensor group arranged in the furnace body, a water temperature difference sensor for monitoring the cooling wall, and a three-dimensional fabric scanner for scanning the shape of the material surface. 4) The central control system is electrically connected to the fabric actuator and the intelligent monitoring system. It is used to receive monitoring data, has a built-in fabric parameter database and optimization algorithm, and outputs control commands to drive the fabric actuator to move.

7. The blast furnace charging control method and apparatus for high-proportion pellet smelting according to claim 6, characterized in that: The fabric tilt angle control accuracy of the rotating fabric feeder is ± 0.1, the weighing error of the online weighing system is ±0.5t.

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