Blast furnace mixed loading and distributing method for ore and coke of large ore batch
By determining the target silo according to the batch weight of ore and coke under large ore batch conditions, and performing screening and independent transportation, the problems of uniform mixing of ore and coke and equipment damage are solved, and the stability and smelting efficiency of blast furnace mixing fabrics are improved.
Patent Information
- Application Number
- CN202510452673.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2025-06-27
AI Technical Summary
Under large ore batch conditions, it is difficult to mix uniformly between ore and coke, and screening causes damage to the equipment, resulting in a reduction in the stability of blast furnace mixed fabric.
By obtaining the batch weight of ore and the operation of the blast furnace, the batch weight of coke is determined, and the target silo is selected from the preset silo collection to screen out the ore and coke that meet the requirements, and control them to be independently transported to different furnace top tanks of the blast furnace, and mix them after reaching the depth of the preset silo line.
It improves the stability of blast furnace mixing fabrics, ensures uniform mixing of raw materials and enters the blast furnace that meets the requirements, extends the service life of the silo equipment, and improves gas utilization and smelting efficiency.
Smart Images
Figure CN120210439A_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the technical field of blast furnace burden distribution, and particularly relates to a method for mixing and distributing ore and coke in a blast furnace with a large ore batch. Background Art
[0002] The blast furnace burden distribution method can determine the distribution of the burden in the blast furnace, and the distribution of the burden can affect the gas distribution and utilization efficiency in the blast furnace. To improve the utilization efficiency of fuel during the smelting process, it is necessary to adjust the burden distribution method. Among them, through the method of mixing and distributing ore and coke, the gas utilization rate can be effectively improved, and the pressure difference between the lump zone and the softening-melting zone can also be reduced to promote the smooth operation of the blast furnace. However, for the mixing and distribution under the condition of a large ore batch, there are problems such as great difficulty in uniformly mixing ore and coke, and great damage to equipment caused by screening of ore and coke. Therefore, how to improve the stability of blast furnace mixed charging under the condition of a large ore batch is a technical problem to be solved urgently. Summary of the Invention
[0003] The embodiment of this application provides a method for mixing and distributing ore and coke in a blast furnace with a large ore batch, which can, to at least a certain extent, improve the stability of blast furnace mixed charging.
[0004] Other characteristics and advantages of this application will become apparent through the following detailed description, or will be learned partially through the practice of this application.
[0005] According to the first aspect of the embodiment of this application, a method for mixing and distributing ore and coke in a blast furnace with a large ore batch is provided, which is characterized in that the method includes: obtaining the ore batch weight of the ore and the operating conditions of the blast furnace, and determining the coke batch weight of the coke based on the ore batch weight and the operating conditions, wherein the ore batch weight at least includes the sinter ore batch weight and the pellet ore batch weight; determining a target sinter ore bin, a target pellet ore bin, and a target coke bin from a preset bin set based on the ore batch weight and the coke batch weight, where the preset bin set at least includes a plurality of sinter ore bins, a plurality of pellet ore bins, and a plurality of coke bins; screening out target sinter ore, target pellet ore, and target coke from the target sinter ore bin, the target pellet ore bin, and the target coke bin respectively; when the stock line in the blast furnace reaches a preset stock line depth, controlling the target sinter ore bin to convey the target sinter ore to the first top bin of the blast furnace, the target pellet ore bin to convey the target pellet ore to the second top bin of the blast furnace, and the target coke bin to convey the target coke to the third top bin of the blast furnace; after the target sinter ore, the target pellet ore, and the target coke have all been charged, opening the first top bin, the second top bin, and the third top bin, and discharging and mixing into the central throat of the blast furnace to obtain a mixed burden, and then completing the burden distribution through a distributing chute.
[0006] In some embodiments of the present application, based on the foregoing solution, determining the target sinter bin, the target pellet bin, and the target coke bin from the preset bin set based on the ore batch weight and the coke batch weight includes: in the preset bin set, taking all sinter bins and all pellet bins with the bin level maintained at 1.3 meters on the bin cone section as the alternative sinter bin set and the alternative pellet bin set respectively, and taking all coke bins with the bin level maintained at 1.0 meters on the bin cone section as the alternative coke bin set; based on the sinter batch weight, extracting a first number of sinter bins from the alternative sinter bin set as the target sinter bins; based on the pellet batch weight, extracting a second number of pellet bins from the alternative pellet bin set as the target pellet bins; and based on the coke batch weight, extracting a third number of coke bins from the alternative coke bin set as the target coke bins.
[0007] In some embodiments of the present application, based on the foregoing solution, screening out the target sinter, the target pellets, and the target coke from the target sinter bin, the target pellet bin, and the target coke bin respectively includes: based on the first particle size range of the sinter, determining a first screening device with a size conforming to the first particle size range, screening the sinter in the target sinter bin, and taking the screened sinter as the target sinter; based on the second particle size range of the pellets, determining a second screening device with a size conforming to the second particle size range, screening the pellets in the target pellet bin, and taking the screened pellets as the target pellets; and based on the third particle size range of the coke, determining a third screening device with a size conforming to the third particle size range, screening the coke in the target coke bin, and taking the screened coke as the target coke.
[0008] In some embodiments of the present application, based on the foregoing solution, controlling the target sinter bin to convey the target sinter to the first top bin of the blast furnace, the target pellet bin to convey the target pellets to the second top bin of the blast furnace, and the target coke bin to convey the target coke to the third top bin of the blast furnace further includes: the target sinter, the target pellets, and the target coke are conveyed in batches independently during the conveying process and do not mix with each other.
[0009] In some embodiments of the present application, based on the foregoing solution, opening the first top bin, the second top bin, and the third top bin, and discharging and mixing materials into the central throat pipe of the blast furnace includes: respectively controlling the opening degrees of the shut-off valves of the first top bin, the second top bin, and the third top bin, so that the total discharging time of the first top bin, the second top bin, and the third top bin is kept consistent; controlling the first top bin, the second top bin, and the third top bin to discharge materials into the central throat pipe of the blast furnace, and making the target sinter, the target pellet, and the target coke be evenly mixed at the central throat pipe.
[0010] In some embodiments of the present application, based on the foregoing solution, the method further includes: after the material passing amounts of the first top bin, the second top bin, and the third top bin all reach the preset material passing amount, controlling the first top bin, the second top bin, and the third top bin to exchange the types of charged materials with each other, where the material passing amount is the total weight of the burden materials cumulatively loaded in each top bin.
[0011] In some embodiments of the present application, based on the foregoing solution, the first top bin, the second top bin, and the third top bin are arranged on the top of the blast furnace, and the distances between any two top bins are equal, and the included angles between the lines connecting any two top bins are all 60°.
[0012] In some embodiments of the present application, based on the foregoing solution, the method further includes: the ore batch weight of the large ore batch ≥ 50t.
[0013] In some embodiments of the present application, based on the foregoing solution, the coke includes at least one of metallurgical coke and high-reactivity coke.
[0014] In some embodiments of the present application, based on the foregoing solution, the preset material passing amount is 1000t to 2000t.
[0015] Based on the technical solution proposed in this application, the coke batch weight is determined by the ore batch weight, and a suitable bin is selected from the preset bin set. On the one hand, it can ensure sufficient raw material supply. On the other hand, selecting a suitable bin for each bin can avoid the problem of equipment wear caused by continuous use of the same bin. Therefore, the service life of the bin can be extended to prevent the stability of the BF mixed charging and distribution from being reduced due to the damage of the bin equipment; by screening the ore and coke in each bin, and using the qualified sinter, pellet and coke as the target sinter, target pellet and target coke, it can ensure that the raw materials entering the BF meet the requirements, which is beneficial to improving the utilization rate of gas in the smelting process and enhancing the smelting efficiency; in addition, when the material line in the BF reaches the preset material line depth, charging starts into the top charging bin at the top of the BF, which can improve the efficiency of mixed charging and distribution to a certain extent, and thus improve the efficiency of ore smelting.
[0016] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this application. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The drawings herein are incorporated into the specification and form a part of this specification, showing embodiments consistent with this application, and are used together with the specification to explain the principles of this application. Obviously, the drawings in the following description are only some embodiments of this application, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts. In the drawings:
[0018] Figure 1 Shows the flow chart of the BF mixed charging and distribution method of ore and coke with a large ore batch in an embodiment of this application;
[0019] Figure 2 Shows a top view of the distribution of the top charging bin at the top of the BF in an embodiment of this application. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0020] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application.
[0021] In addition, the described features, structures, or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, numerous specific details are provided to give a thorough understanding of the embodiments of the present application. However, those skilled in the art will realize that the technical solutions of the present application may be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. may be adopted. In other cases, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the present application.
[0022] The block diagrams shown in the drawings are only functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or implemented in one or more hardware modules or integrated circuits, or implemented in different networks and / or processor devices and / or microcontroller devices.
[0023] The flowcharts shown in the drawings are only illustrative and do not necessarily include all the content and operations / steps, nor do they necessarily need to be executed in the described order. For example, some operations / steps may be decomposed, while some operations / steps may be combined or partially combined, so the actual execution order may change according to the actual situation.
[0024] It should be noted that the term "plurality" mentioned in this article refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.
[0025] It should also be noted that the terms "first", "second", etc. in the description, claims, and above-mentioned drawings of the present application are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that the objects so used may be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described.
[0026] To enable those skilled in the art to better understand the present application, the burdening and charging of the blast furnace proposed in the present application will be briefly described first.
[0027] The burden distribution method of the blast furnace can determine the distribution of the burden in the blast furnace, and the distribution of the burden can affect the gas distribution and utilization efficiency in the blast furnace. To improve the utilization efficiency of fuel during the smelting process, it is necessary to adjust the burden distribution method. Among them, through the mixed charging method of ore and coke, the gas utilization rate can be effectively improved, and the pressure difference between the lump zone and the softening-melting zone can also be reduced to promote the smooth operation of the blast furnace. However, for the mixed charging under the condition of large ore batches, there are problems such as great difficulty in uniformly mixing ore and coke, and great damage to equipment caused by the screening of ore and coke. Therefore, how to improve the stability of the mixed charging of the blast furnace under the condition of large ore batches is a technical problem to be solved urgently. Based on this, the inventors of this application proposed a method for mixed charging of ore and coke in the blast furnace with large ore batches to improve the stability of the mixed charging of the blast furnace.
[0028] Next, this application will elaborate in detail on a method for mixed charging of ore and coke in the blast furnace with large ore batches proposed.
[0029] See Figure 1 , which shows the flow chart of the method for mixed charging of ore and coke in the blast furnace with large ore batches in an embodiment of this application. Referring to Figure 1 shown, the method for mixed charging of ore and coke in the blast furnace with large ore batches at least includes steps 110 to 150, which are introduced in detail as follows:
[0030] Step 110, obtain the ore batch weight of the ore and the operating conditions of the blast furnace, and based on the ore batch weight and the operating conditions, determine the coke batch weight of the coke, where the ore batch weight at least includes the sintered ore batch weight and the pellet ore batch weight.
[0031] Step 120, based on the ore batch weight and the coke batch weight, determine the target sintered ore bin, the target pellet ore bin and the target coke bin from the preset bin set, where the preset bin set at least includes a plurality of sintered ore bins, a plurality of pellet ore bins and a plurality of coke bins.
[0032] Step 130, respectively screen out the target sintered ore, the target pellet ore and the target coke from the target sintered ore bin, the target pellet ore bin and the target coke bin.
[0033] Step 140, when the stock line in the blast furnace reaches the preset stock line depth, control the target sintered ore bin to convey the target sintered ore to the first top bin of the blast furnace, the target pellet ore bin to convey the target pellet ore to the second top bin of the blast furnace, and the target coke bin to convey the target coke to the third top bin of the blast furnace.
[0034] Step 150, after the target sinter, the target pellet and the target coke are all charged, open the first top charging hopper, the second top charging hopper and the third top charging hopper, discharge and mix the materials into the center throat pipe of the blast furnace to obtain mixed burden materials, and then complete the burden distribution through the burden distributing chute.
[0035] In this application, the ore batch weight of the large ore batch can be ≥ 50t, specifically it can be 60t, it can be 80t, or it can also be 90t. In this regard, this application does not make specific limitations.
[0036] In this application, the operating conditions of the blast furnace mainly include the gas utilization rate in the blast furnace and the blast furnace temperature level.
[0037] In this application, the coke includes at least one of metallurgical coke and high-reactivity coke. One type of coke can be selected only, or multiple types of coke can be used in combination. This application does not make specific limitations in this regard.
[0038] In this application, during the process that the target sinter bin, the target pellet bin and the target coke bin respectively transport the burden materials to the first top charging hopper, the second top charging hopper and the third top charging hopper, the independent transportation between different ores and cokes does not interfere with each other. The advantage is that the ores and cokes can be transported to different top charging hoppers respectively, avoiding mixing during the transportation process, avoiding affecting the mixing uniformity during subsequent mixing of the burden materials, ensuring that the ores and cokes can be mixed evenly, and thus improving the stability and safety of the mixed burden distribution.
[0039] In this application, the first top charging hopper, the second top charging hopper and the third top charging hopper are arranged on the top of the blast furnace, and the distance between any two top charging hoppers is equal, and the included angle between the connecting lines of any two top charging hoppers is 60°. Specifically, please refer to Figure 2 , which shows a top view schematic diagram of the distribution of the top charging hoppers on the top of the blast furnace in an embodiment of this application. It can be seen from the figure that the first top charging hopper, the second top charging hopper and the third top charging hopper are distributed in the form of an equilateral triangle on the top of the blast furnace. In this way, by arranging the top charging hoppers at equal distances, it can be ensured that the burden materials discharged from each hopper can be mixed more evenly in the center throat pipe; and because the distance between any two top charging hoppers is equal, the distribution of the material flows discharged from different hoppers in space is more symmetrical, which is beneficial to better mixing of the material flows in the center throat pipe. Secondly, arranging at equal distances can also make the distances from each hopper to the center throat pipe basically the same, which means that the time difference of the material flows discharged from different hoppers reaching the center throat pipe is relatively small. The relatively small time difference can make the discharging process more synchronous, further improving the mixing uniformity, and thus improving the stability of the mixed burden distribution in the blast furnace.
[0040] In this application, the coke batch weight is determined based on the ore batch weight, and a suitable bin is selected from a preset set of bins. On the one hand, it can ensure sufficient raw material supply. On the other hand, by selecting a suitable bin for each bin, the problem of equipment wear caused by continuous use of the same bin can be avoided. Therefore, the service life of the bin can be extended to prevent the stability of the mixed charging and distribution in the blast furnace from being reduced due to the damage of the bin equipment. By screening the ore and coke in each bin, the qualified sinter, pellet and coke are used as the target sinter, target pellet and target coke, which can ensure that the raw materials entering the blast furnace meet the requirements, is conducive to improving the utilization rate of gas in the smelting process and improving the smelting efficiency. In addition, when the material line in the blast furnace reaches the preset depth of the material line, charging starts into the top bin at the top of the blast furnace, which can improve the efficiency of mixed charging and distribution to a certain extent, and further improve the efficiency of ore smelting.
[0041] In step 120 above, determining the target sinter bin, target pellet bin and target coke bin from the preset set of bins based on the ore batch weight and the coke batch weight can be performed at least according to the following steps 121 to 124:
[0042] Step 121, in the preset set of bins, all sinter bins and all pellet bins with the bin level maintained at 1.3 meters above the cone section of the bin are respectively used as the alternative sinter bin set and the alternative pellet bin set, and all coke bins with the bin level maintained at 1.0 meter above the cone section of the bin are used as the alternative coke bin set.
[0043] Step 122, based on the sinter batch weight, extract the first number of sinter bins from the alternative sinter bin set as the target sinter bins.
[0044] Step 123, based on the pellet batch weight, extract the second number of pellet bins from the alternative pellet bin set as the target pellet bins.
[0045] Step 124, based on the coke batch weight, extract the third number of coke bins from the alternative coke bin set as the target coke bins.
[0046] In a specific embodiment of this application, the preset set of bins specifically may include 5 sinter bins, 6 pellet bins and 6 coke bins, or may be 6 sinter bins, 7 pellet bins and 5 coke bins. According to actual needs, the preset set of bins may also be other quantities and combinations. In this regard, this application does not make specific limitations.
[0047] In this application, the specific value of the first quantity can be 2 or 3, the specific value of the second quantity can be 3 or 4, and the specific value of the third quantity can be 3 or 4. According to actual needs, the first quantity, the second quantity, and the third quantity can also be other numerical values, and this application does not make specific limitations thereon.
[0048] In this application, by setting specific height requirements for the silo levels, it can be ensured that there is sufficient supply of ore and coke in the selected silos. By setting different level standards according to different ores and cokes, the characteristics of various ores and cokes can be better utilized, and more suitable silos can be selected, thereby improving the stability of the mixed charging and distribution. In addition, by determining the extraction quantities of various silos based on the sinter batch weight, pellet batch weight, and coke batch weight respectively, the usage quantities of various silos can be flexibly adjusted according to actual production requirements, ensuring both sufficient supply of ore and coke and avoiding resource waste. By dynamically screening various silos, different silos can be more evenly utilized to extend the service life of the silo equipment, thereby improving the stability of the mixed charging and distribution.
[0049] In the above step 130, the specific steps of screening out the target sinter, target pellet, and target coke from the target sinter silo, target pellet silo, and target coke silo respectively can be executed according to the following steps 131 to 133:
[0050] Step 131: Based on the first particle size range of the sinter, determine a first screening device with a size that meets the first particle size range, screen the sinter in the target sinter silo, and use the screened sinter as the target sinter.
[0051] Step 132: Based on the second particle size range of the pellets, determine a second screening device with a size that meets the second particle size range, screen the pellets in the target pellet silo, and use the screened pellets as the target pellets.
[0052] Step 133: Based on the third particle size range of the coke, determine a third screening device with a size that meets the third particle size range, screen the coke in the target coke silo, and use the screened coke as the target coke.
[0053] In this application, the first particle size range can specifically be from 5 mm to 60 mm, the second particle size range can specifically be from 8 mm to 16 mm, and the third particle size range can specifically be from 15 mm to 100 mm. According to actual needs, the first particle size range, the second particle size range, and the third particle size range can also be other numerical ranges, and this application does not make specific limitations thereon.
[0054] In this application, different particle size requirements are set according to different types of ores and cokes, and appropriate equipment is selected for screening, which can ensure that the ores and cokes entering the blast furnace meet the particle size requirements. This can not only improve the stability of the process of transporting ores and cokes, but also optimize the gas distribution in the blast furnace, thereby improving the smelting efficiency. This screening method for ores and cokes can not only screen out suitable ores and cokes from the bunker, but also improve the air permeability of the burden distribution in the blast furnace, and ultimately improve the stability of the mixed charging and distribution in the blast furnace and the blast furnace smelting efficiency.
[0055] In the above step 150, opening the first top bunker, the second top bunker, and the third top bunker, and discharging and mixing into the center throat of the blast furnace can be specifically carried out according to the following steps 151 to step 152:
[0056] Step 151, respectively control the opening degrees of the shut-off valves of the first top bunker, the second top bunker, and the third top bunker, so that the total discharge times of the first top bunker, the second top bunker, and the third top bunker are the same.
[0057] Step 152, control the first top bunker, the second top bunker, and the third top bunker to discharge into the center throat of the blast furnace, and make the target sinter, the target pellet, and the target coke be evenly mixed at the center throat.
[0058] In this application, the opening degrees of the respective shut-off valves of the first top bunker, the second top bunker, and the third top bunker can be specifically determined according to the weight of the loaded ores. For example, in a specific embodiment, the batch weight of the sinter is 77t, the batch weight of the pellet is 93t, and the batch weight of the coke is 30t. Based on the weights of the respective ores and cokes, the opening degree of the shut-off valve of the top bunker loaded with sinter can be set to 30°, the opening degree of the shut-off valve of the top bunker loaded with pellet can be set to 40°, and the opening degree of the shut-off valve of the top bunker loaded with coke can be set to 25°, so as to ensure that the total discharge times of the respective bunkers are the same, and further ensure that the ores and cokes can be evenly mixed.
[0059] In this application, by controlling the opening degrees of the shut-off valves of the top bunkers, synchronous discharge of different types of burden can be achieved, which can avoid the situation that a certain type of burden is discharged completely too early or the discharge time is too long, resulting in burden stratification and uneven mixing, and can effectively improve the stability of the mixed charging and distribution in the blast furnace; in addition, using the center throat as the mixing point of different types of burden, through the natural mixing effect during the falling process of the burden, the gravity effect is fully utilized, which can better handle the burden of large ore batches and further improve the stability of the mixed charging and distribution in the blast furnace.
[0060] In the method for charging the blast furnace with ore and coke in large ore batches proposed in this application, the method may further perform the following step 160:
[0061] Step 160: After the charging amounts of the first top bin, the second top bin, and the third top bin all reach the preset charging amount, control the first top bin, the second top bin, and the third top bin to exchange the types of charged materials with each other. The charging amount is the total weight of the furnace materials accumulated and loaded in each top bin.
[0062] In this application, the preset charging amount may specifically be 1000t to 2000t. For example, it may be 1200t, or it may be 1500t, or it may also be 1700t. This application does not make specific limitations in this regard.
[0063] In this application, since the impact wear strengths of sinter, pellet, and coke on the bin lining are different, by setting the charging amount, when the charging amount in the top bin reaches the preset charging amount, exchanging the types of charged materials in each top bin with each other can avoid the impact of a certain type of ore or coke on the bin lining for a long time, causing wear, and thus can extend the service life of the top bin and reduce losses.
[0064] Based on the technical solution proposed in this application, determining the coke batch weight based on the ore batch weight and selecting a suitable bin from the preset bin set can, on the one hand, ensure sufficient raw material supply, and on the other hand, selecting a suitable bin for each bin can avoid the problem of equipment wear caused by continuous use of the same bin. Therefore, the service life of the bin can be improved to prevent the stability of the blast furnace charging from being reduced due to the damage of the bin equipment; by screening the ore and coke in each bin and using the qualified sinter, pellet, and coke as the target sinter, target pellet, and target coke, it can be ensured that the raw materials entering the blast furnace all meet the requirements, which is beneficial to improving the utilization rate of gas in the smelting process and improving the smelting efficiency; in addition, when the material line in the blast furnace reaches the preset material line depth, starting to charge the top bin at the top of the blast furnace can, to a certain extent, improve the charging efficiency of the mixed charging, and thus improve the ore smelting efficiency.
[0065] The above are only the embodiments of this application and are not used to limit this application. For those skilled in the art, this application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the scope of the claims of this application.
Claims
1. A method for mixing and distributing ore and coke from a large batch into a blast furnace, characterized in that: The method comprises: Obtaining the ore batch weight of the ore and the operation status of the blast furnace, and determining the coke batch weight of the coke based on the ore batch weight and the operation status, wherein the ore batch weight at least includes the sintered ore batch weight and the pelletized ore batch weight; Based on the ore batch weight and the coke batch weight, determining a target sinter ore silo, a target pellet silo and a target coke silo from a preset silo set, wherein the preset silo set includes at least a plurality of sinter ore silos, a plurality of pellet silos and a plurality of coke silos; Screening out target sintered ore, target pelletized ore and target coke from the target sintered ore silo, the target pelletized ore silo and the target coke silo respectively; When the material line in the blast furnace reaches a preset material line depth, the target sinter ore silo is controlled to transport the target sinter ore to the first furnace top material tank of the blast furnace, the target pellet silo is controlled to transport the target pellet ore to the second furnace top material tank of the blast furnace, and the target coke silo is controlled to transport the target coke to the third furnace top material tank of the blast furnace; After the target sintered ore, the target pelletized ore and the target coke are loaded, the first furnace top material tank, the second furnace top material tank and the third furnace top material tank are opened to discharge and mix the materials into the central throat of the blast furnace to obtain mixed furnace charge, and then the charge is distributed through the distribution chute.
2. The method according to claim 1, characterized in that The method of determining a target sinter ore silo, a target pellet silo and a target coke silo from a preset silo set based on the ore batch weight and the coke batch weight includes: In the preset silo set, all sinter silos and all pellet silos whose silos are kept at 1.3 meters above the silo cone section are respectively taken as the candidate sinter silo set and the candidate pellet silo set, and all coke silos whose silos are kept at 1.0 meters above the silo cone section are taken as the candidate coke silo set; Based on the sintered ore batch weight, extracting a first number of sintered ore bins from the candidate sintered ore bin set as target sintered ore bins; Based on the pellet batch weight, extract a second number of pellet silos from the candidate pellet silo set as target pellet silos; Based on the coke batch weight, a third number of coke bins are selected from the candidate coke bin set as target coke bins.
3. The method according to claim 1, characterized in that The method of selecting target sintered ore, target pelletized ore and target coke from the target sintered ore bin, the target pelletized ore bin and the target coke bin respectively comprises: Based on the first particle size range of the sintered ore, determine a first screening device whose size meets the first particle size range, screen the sintered ore in the target sintered ore bin, and use the screened sintered ore as the target sintered ore; Based on the second particle size range of the pellets, determine a second screening device whose size meets the second particle size range, screen the pellets in the target pellet silo, and use the screened pellets as target pellets; Based on the third particle size range of the coke, a third screening device having a size that matches the third particle size range is determined, the coke in the target coke silo is screened, and the screened coke is used as the target coke.
4. The method according to claim 1, characterized in that: The method of controlling the target sinter ore silo to transport the target sinter ore to the first furnace top material tank of the blast furnace, the target pellet silo to transport the target pellet ore to the second furnace top material tank of the blast furnace, and the target coke silo to transport the target coke to the third furnace top material tank of the blast furnace, further includes: The target sintered ore, the target pelletized ore and the target coke are transported independently in batches during the transportation process and are not mixed with each other.
5. The method according to claim 1, characterized in that The step of opening the first furnace top material tank, the second furnace top material tank and the third furnace top material tank to discharge and mix materials into the central throat of the blast furnace comprises: Respectively controlling the openings of the shutoff valves of the first furnace top material tank, the second furnace top material tank and the third furnace top material tank so that the total discharge time of the first furnace top material tank, the second furnace top material tank and the third furnace top material tank remains consistent; The first furnace top material tank, the second furnace top material tank and the third furnace top material tank are controlled to discharge materials into the central throat of the blast furnace, and the target sintered ore, the target pellet ore and the target coke are uniformly mixed at the central throat.
6. The method according to claim 1, characterized in that The method further comprises: After the overflow amounts of the first furnace top material tank, the second furnace top material tank and the third furnace top material tank all reach the preset overflow amounts, the first furnace top material tank, the second furnace top material tank and the third furnace top material tank are controlled to exchange the types of charges with each other, and the overflow amount is the total weight of the charge accumulated in each furnace top material tank.
7. The method according to claim 1, characterized in that The first furnace top material tank, the second furnace top material tank and the third furnace top material tank are arranged on the furnace top of the blast furnace, and the distance between any two furnace top material tanks is equal, and the angle between any two furnace top material tanks is 60°.
8. The method according to claim 1, characterized in that The ore batch weight of the large ore batch is ≥50t.
9. The method according to claim 1, characterized in that: The coke includes at least one of metallurgical coke and high-reactivity coke.
10. The method according to claim 6, characterized in that The preset material flow rate is 1000t to 2000t.