Docked coke distribution method and system for blast furnace top distribution

Abstract

The invention provides a coke nut distribution method and system for blast furnace top distribution, and relates to the field of blast furnace ironmaking. The method comprises the steps that three-dimensional modeling software is adopted, a three-dimensional geometric model is built for blast furnace top material distribution equipment, a material model is built for materials, physical attribute parameters between the materials are set, and an initial model is obtained; optimizing the physical attribute parameters among the materials to obtain an optimized material distribution model; a plurality of working conditions are preset according to the feeding states of the ores and the coke nuts, and the optimized material distribution model is adopted for simulation; and analyzing the simulation result of each working condition, and determining the optimal working condition of the coke nut distribution effect. According to the method, a three-dimensional simulation model established according to actual blast furnace top material distribution equipment is utilized, simulation is performed under different preset working conditions, the distribution behavior and rule of the coke nuts in the whole transfer process of entering the blast furnace throat from the under-tank system are analyzed, and finally the working condition of the optimal coke nut material distribution effect is determined; and interference and inhibition of nut coke on central airflow during blast furnace combustion are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of blast furnace ironmaking, and in particular to a method and system for distributing chopped coke on a blast furnace roof. Background Art

[0002] Since blast furnaces rely on coke as fuel, the process also involves screening out small particles of coke, which also serve as fuel. Due to the impact of transportation, the proportion of coke increases after repeated handling. If all of this excess coke is consumed by the blast furnace, the blast furnace's coke content can be quite high, sometimes exceeding 60kg / ton of iron. Fluctuations in the cold strength of the coke also affect the proportion of coke fed into the furnace, impacting furnace conditions and preventing fuel costs from being effectively reduced. Currently, most blast furnaces utilize a trolley-and-tank system for charging. Therefore, it is imperative to study the distribution and redistribution of coke within this system and clarify its underlying principles to determine how to optimize its use, reduce fuel costs per ton of iron, and ensure stable operation.

[0003] At present, domestic and foreign counterparts mainly control the proportion of diced coke within a reasonable range based on the multi-tank distribution method or under the premise of sufficient control of raw materials. There is currently little research on multi-level blast furnaces, coke varieties and the allocation of small-particle coke among multiple production lines. In the context of low-energy smelting, it is of great practical significance to digest small-particle coke as much as possible. Summary of the Invention

[0004] The present invention aims to provide a method and system for distributing diced coke for blast furnace top charging. By establishing a simulation model for blast furnace top charging, the distribution behavior of diced coke during the blast furnace top charging process under different working conditions is analyzed and the optimized diced coke feeding sequence is found to achieve the best charging effect.

[0005] To achieve the above objectives, the present invention proposes the following technical solutions:

[0006] In a first aspect, a method for distributing chopped coke to a blast furnace top is provided, comprising the following steps:

[0007] 1) Using 3D modeling software, a 3D geometric model is constructed for the blast furnace top charging equipment, a material model is constructed for the materials, and physical property parameters between the materials are set to obtain an initial model of the blast furnace top charging. The material model constructed for the materials includes ore and coke.

[0008] 2) Optimize the physical property parameters of the materials to fit the actual blast furnace top distribution state and obtain an optimized distribution model;

[0009] 3) Presetting a number of operating conditions based on the loading status of ore and coke before blast furnace top charging, simulating each operating condition in turn using the optimized charging model according to the actual operation process of the top charging equipment, and outputting the simulation results of each operating condition;

[0010] 4) Analyze the simulation results obtained from each working condition to determine the optimal working condition for the coke distribution effect;

[0011] 5) Carry out actual blast furnace top charging according to the optimal working conditions for coke distribution effect.

[0012] Furthermore, the process of determining the optimal working condition for the scorched shreds distribution effect in step 4) includes:

[0013] Extract simulation data obtained from simulation of each working condition, determine target parameters and operating data corresponding to the target parameters;

[0014] According to the time sequence of the tank discharge, the weight of the ore and coke remaining in the tank after the discharge at each unit time is obtained in sequence;

[0015] According to the weight of the ore and coke remaining in the tank after charging at each unit time, the weight of the ore and coke discharged from the tank after charging at each unit time is calculated, and the tank discharge time curve is drawn;

[0016] According to the discharge time curve of the material tank, the weight distribution of the coke pieces along the radial direction of the blast furnace under various working conditions is analyzed, and then the optimal working condition for the coke piece distribution effect is determined.

[0017] Furthermore, the process of optimizing the physical property parameters between materials to fit the actual blast furnace top distribution state in step 2) is as follows:

[0018] Determine the setting objects and parameter contents of the property parameters between materials, wherein the setting objects include ore and ore, ore and coke, coke and coke, ore and furnace top distribution equipment, and coke and furnace top distribution equipment, and the parameter contents include the static friction coefficient, rolling friction coefficient, and restitution coefficient between any group of objects;

[0019] Experimental verification or trial calculation is used to optimize the numerical values ​​of the material attribute parameters to fit the actual blast furnace top distribution state and obtain the optimized distribution model.

[0020] Furthermore, the specific process of step 3) presetting several working conditions according to the charging state of ore and coke before blast furnace top charging is as follows:

[0021] Use a car loading system to determine the number of mine cars, the loading parameters of any car, and the number of preset working conditions;

[0022] For any working condition, the loading status of the materials in each material car is set respectively; wherein, the loading status of the materials includes coke first and ore later, ore first and coke later, coke and ore mixed, and all ore.

[0023] Furthermore, the process of analyzing the weight distribution of coke cubes along the radial direction of the blast furnace under various working conditions based on the discharge time curve of the charging tank is as follows: based on the discharge time curve of the charging tank and the charging pattern of the blast furnace top, the weight distribution curve of coke cubes along the radial direction of the blast furnace under various working conditions is drawn.

[0024] Furthermore, the step 1) constructs a material model for the material including an ore model and a coke dicing model;

[0025] The simulated particle sizes of ores of different particle sizes in the ore model are as follows: actual particle size 5-10mm, simulated particle size 7.5mm; actual particle size 10-25mm, simulated particle size 12.5mm; actual particle size 25-40mm, simulated particle size 32.5mm; actual particle size greater than 40mm, simulated particle size 50mm;

[0026] The simulated particle sizes of coke cubes of different particle sizes in the coke cube model are as follows: actual particle size 6-10 mm, simulated particle size 8 mm; actual particle size 10-15 mm, simulated particle size 12.5 mm; actual particle size 15-23 mm, simulated particle size 19 mm.

[0027] Furthermore, when simulating and analyzing each of the working conditions, the mass proportions of ore models with different simulated particle sizes are: simulated particle size 7.5mm, 22%; simulated particle size 12.5mm, 36%; simulated particle size 32.5mm, 29%; simulated particle size 50mm, 13%; the mass proportions of coke models with different simulated particle sizes are: simulated particle size 8mm, 17%; simulated particle size 12.5mm, 45%; simulated particle size 19mm, 38%.

[0028] Furthermore, when the material car loading system is used to simulate the various working conditions of three-car ore loading, it is determined that the loading state of the material in the first material car is ore first and then coke, the loading state of the material in the second material car is all ore, and the loading state of the material in the third material car is all ore. The preset working conditions are the optimal working conditions for the coke distribution effect.

[0029] In a second aspect, a chopped coke distribution system for a blast furnace top is provided, comprising a blast furnace top distribution device; and further comprising:

[0030] The 3D model building module is used to use 3D modeling software to build a 3D geometric model of the blast furnace top distribution equipment, build a material model for the materials, and set the physical property parameters between the materials to obtain the initial model of the blast furnace top distribution. The material model built for the materials includes ore and coke.

[0031] The model optimization module is used to optimize the physical property parameters of the materials to fit the actual blast furnace top distribution state and obtain the optimized distribution model;

[0032] A simulation module is used to preset several working conditions according to the charging status of ore and coke before blast furnace top charging, simulate each working condition in turn using the optimized charging model according to the actual operation process of the furnace top charging equipment, and output the simulation results of each working condition;

[0033] The analysis and calculation module is used to analyze the simulation results obtained from the simulation of each working condition and determine the optimal working condition for the coke dicing distribution effect, so that the blast furnace top distribution equipment can actually carry out the blast furnace top distribution according to the optimal working condition for the coke dicing distribution effect.

[0034] Furthermore, the analysis and calculation module determines the execution unit of the optimal working condition for the coke distribution effect, including:

[0035] An extraction unit is used to extract simulation data obtained from simulation of each working condition, and determine target parameters and operating data corresponding to the target parameters;

[0036] The acquisition unit is used to sequentially acquire the weight of the ore and coke remaining in the material tank after discharging at each unit time according to the time sequence of the material tank discharge;

[0037] The statistical drawing unit is used to calculate the weight of the ore and coke pieces discharged from the feed tank after the feed is distributed at each unit time according to the weight of the ore and coke pieces remaining in the feed tank after the feed is distributed at each unit time, and to draw the feed tank discharge time curve;

[0038] The analysis and determination unit is used to analyze the weight distribution of coke pieces along the radial direction of the blast furnace under various working conditions according to the discharge time curve of the material tank, and then determine the optimal working condition for the coke piece distribution effect.

[0039] It can be seen from the above technical solutions that the technical solutions of the present invention have achieved beneficial effects:

[0040] The present invention discloses a method and system for distributing coke briquettes to a blast furnace top, comprising: using three-dimensional modeling software to construct a three-dimensional geometric model of the blast furnace top distribution equipment, constructing a material model of the materials, and setting physical property parameters between the materials to obtain an initial model; optimizing the physical property parameters between the materials to obtain an optimized distribution model; presetting a number of operating conditions based on the loading status of ore and coke briquettes before distributing the blast furnace top distribution, and performing simulations for each of the conditions using the optimized distribution model; analyzing the simulation results for each operating condition to determine the optimal operating condition for coke briquettes distribution to facilitate actual distribution of the blast furnace top. The present invention utilizes a three-dimensional simulation model established based on actual blast furnace top distribution equipment to perform simulations under different preset operating conditions, analyzing the distribution behavior and patterns of coke briquettes during the entire transfer process from the under-trough system to the blast furnace throat, and ultimately determining the optimal operating condition for coke briquettes distribution; that is, by simulating the movement trajectory of coke briquettes after entering the blast furnace in different orders, the present invention ensures that the coke briquettes are distributed as much as possible to the furnace wall and the outer periphery of the annular belt during the blast furnace distribution process, thereby reducing the interference and inhibition of the coke briquettes on the airflow in the blast furnace combustion center during blast furnace combustion.

[0041] The present invention obtains the optimal working conditions for the distribution effect of diced coke through simulation, and can optimize the use of diced coke in blast furnace combustion. Compared with the existing technology, this solution does not require repeated trials during the distribution process on the blast furnace top, reducing time and fuel cost consumption. After the simulation structure is applied, it can effectively reduce the fuel cost per ton of iron in the blast furnace and ensure stable operation of the blast furnace.

[0042] It should be appreciated that all combinations of the foregoing concepts, as well as additional concepts described in greater detail below, to the extent such concepts are not mutually inconsistent, can be considered to be part of the inventive subject matter of this disclosure.

[0043] The foregoing and other aspects, embodiments, and features of the present invention will be more fully understood from the following description in conjunction with the accompanying drawings. Other additional aspects of the present invention, such as features and / or beneficial effects of the exemplary embodiments, will become apparent from the following description or through practice of specific embodiments according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings are not drawn to scale. In the accompanying drawings, each identical or nearly identical component shown in various figures may be represented by the same reference numeral. For clarity, not every component is labeled in every figure. Embodiments of various aspects of the present invention will now be described by way of example with reference to the accompanying drawings, in which:

[0045] Figure 1 A flow chart of a method for distributing coke briquettes to a blast furnace top disclosed in an embodiment of the present invention;

[0046] Figure 2 1. The material tank discharge time curve diagram corresponding to each working condition of the embodiment of the present invention;

[0047] Figure 3 Graph showing weight distribution of diced coke along the radial direction of the blast furnace corresponding to various operating conditions in an embodiment of the present invention;

[0048] Figure 4 This is a structural block diagram of the coke distribution system for blast furnace top distribution disclosed in an embodiment of the present invention. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be the common meanings understood by people with ordinary skills in the field to which the present invention belongs.

[0050] The words "first", "second" and similar words used in the patent application specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, unless the context clearly indicates otherwise, the singular forms of "a", "an" or "the" and similar words do not indicate a quantity limitation, but rather indicate the presence of at least one. Words such as "include" or "comprises" mean that the elements or objects appearing before "include" or "comprises" cover the features, wholes, steps, operations, elements and / or components listed after "include" or "comprises", and do not exclude the existence or addition of one or more other features, wholes, steps, operations, elements, components and / or their collections.

[0051] Based on the fact that there is little research on the distribution of multi-level blast furnaces, coke varieties and diced coke among multiple production lines in the current blast furnace charging scheme, how to improve the use of diced coke in blast furnace smelting without affecting the stable operation of the blast furnace requires studying the distribution behavior of diced coke in the blast furnace charging; therefore, the present invention aims to propose a diced coke charging method and system for blast furnace top charging, and use simulation technology to study the distribution law of diced coke in the blast furnace under different charging sequences during the blast furnace charging process, so as to provide a reference for optimizing the use of diced coke in the blast furnace.

[0052] Combine Figure 1 As shown, the method for distributing coke briquettes to a blast furnace top disclosed in the present invention comprises the following steps:

[0053] Step S1: Using 3D modeling software, construct a 3D geometric model of the blast furnace top charging equipment, construct a material model for the materials, and set physical property parameters between the materials to obtain an initial model of the blast furnace top charging. The material model constructed for the materials includes ore and coke.

[0054] The blast furnace top charging equipment includes a material collection hopper, two charging trolleys (respectively marked as A-side trolley and B-side trolley), a receiving hopper and a material tank. When modeling, a three-dimensional geometric model is constructed according to the actual size of the blast furnace; the objects of material modeling are mainly ore and coke; the density, Poisson's ratio, elastic modulus and particle size distribution of ore particles, among which the particle size distribution is determined according to the ore particle size distribution commonly used in blast furnace ironmaking; the particle shape of the ore can be replaced by a single sphere, or composed of multiple spheres superimposed; coke and ore are modeled similarly. For example, the simulated particle sizes of ores of different particle sizes in the constructed ore model are as follows: actual particle size 5-10mm, simulated particle size 7.5mm; actual particle size 10-25mm, simulated particle size 12.5mm; actual particle size 25-40mm, simulated particle size 32.5mm; actual particle size greater than 40mm, simulated particle size 50mm; the mass proportion of ore models with different simulated particle sizes is as follows: simulated particle size 7.5mm, 22%; simulated particle size 12.5mm, 36%; simulated particle size 32 .5mm, 29%; simulated particle size 50mm, 13%; the simulated particle sizes of coke cubes of different particle sizes in the constructed coke cube model are as follows: actual particle size 6-10mm, simulated particle size 8mm; actual particle size 10-15mm, simulated particle size 12.5mm; actual particle size 15-23mm, simulated particle size 19mm; the mass proportion of coke cube models with different simulated particle sizes is as follows: simulated particle size 8mm, 17%; simulated particle size 12.5mm, 45%; simulated particle size 19mm, 38%.

[0055] Step S2, optimizing the physical property parameters between materials to fit the actual blast furnace top distribution state, and obtaining an optimized distribution model; the specific process is: determining the setting objects and parameter contents of the property parameters between materials, wherein the setting objects include ore and ore, ore and coke, coke and coke, ore and furnace top distribution equipment, and coke and furnace top distribution equipment, and the parameter contents include the static friction coefficient, rolling friction coefficient, and restitution coefficient between any group of objects; optimizing the numerical values ​​of the property parameters between materials by experimental verification or trial calculation to fit the actual blast furnace top distribution state, and obtaining an optimized distribution model.

[0056] Step S3, presetting a plurality of operating conditions according to the charging status of ore and coke before blast furnace top charging, simulating each operating condition in turn using the optimized charging model according to the actual operation process of the top charging equipment, and outputting the simulation results of each operating condition;

[0057] A feeding car loading system is used to determine the number of mine cars, the charging parameters of any feeding car and the number of preset working conditions; for any working condition, the loading status of the materials in each feeding car is set respectively; wherein, the loading status of the materials includes coke first and then ore, ore first and then coke, coke and ore mixed, and all ore. First, in a specific embodiment, the working conditions are analyzed first; the actual working conditions of the blast furnace top charging are limited. In the feeding car loading system of a three-car mine, coke may appear in the front section (i.e., coke is added first and then ore) and the back section (i.e., ore is added first and then coke) of each car, and the other sections (and cars) are all ore, so there are a total of 6 possibilities; secondly, considering that coke and ore are mixed in a certain car, there are 3 possibilities: mixing in the first car, mixing in the second car and mixing in the third car; therefore, there are a total of 9 feeding working conditions that can be simulated. During the simulation, the total amount of ore and the total amount of coke in each working condition remain consistent. The only change is the timing of adding coke.

[0058] During the specific simulation, the ore flow rate and total amount, coke flow rate and total amount, and the uniform production and loading of ore particles of various sizes into the centralized bucket are determined for each working condition based on the actual loading time sequence and total loading time of the production working conditions. The coke particles of various sizes are also uniformly produced and loaded into the centralized bucket. Then, the action interlock of the simulation model is set according to the actual work flow of the blast furnace top distribution. At the beginning of the simulation, the central bucket is moved horizontally to the top of the trolley on side A, and the system generates materials and loads them into the central bucket; when the material in the central bucket reaches the total amount of one car, the bottom valve of the central bucket opens and the material is unloaded into the trolley on side A; after unloading is completed, the trolley on side A dumps the material into the receiving hopper according to the set angle until the dumping is completed and the original angle is restored to prepare for the next car of material; before the trolley on side A dumps and unloads, the central bucket is moved horizontally to the top of the trolley on side B, and the system generates materials and loads them into the central bucket. When the material in the central bucket reaches the total amount of one car, the bottom valve of the central bucket opens and the material is unloaded into the trolley on side B; after unloading is completed, the trolley on side B starts to dump the material, similar to the action of the trolley on side A; the two loading trolleys reciprocate until all three carloads of material are unloaded into the receiving hopper; then, the valve at the bottom of the receiving hopper opens and the material is discharged into the material tank; after all the material is loaded into the material tank, the material flow valve at the bottom of the material tank is opened and the material discharge operation is carried out until the discharge is completed and the simulation calculation ends.

[0059] Step S4, analyzing the simulation results obtained from the simulation of each operating condition to determine the optimal operating condition for the coke distribution effect; specifically, determining the optimal operating condition for the coke distribution effect by determining the weight distribution of the coke in the radial direction of the blast furnace under each operating condition through simulation analysis;

[0060] The process of determining the optimal operating condition for the coke distributing effect in the embodiment includes: extracting simulation data obtained from the simulation of each operating condition, determining target parameters and operating data corresponding to the target parameters; sequentially obtaining the weight of the ore and coke remaining in the material tank after distributing at each unit time according to the time sequence of the material tank discharge; based on the weight of the ore and coke remaining in the material tank after distributing at each unit time, calculating the weight of the ore and coke discharged from the material tank after distributing at each unit time, and drawing a material tank discharge time curve; based on the material tank discharge time curve, analyzing the weight distribution of the coke along the radial direction of the blast furnace under each operating condition, and then determining the optimal operating condition for the coke distributing effect.

[0061] Since the current blast furnace charging starts from the edge of the furnace wall and gradually charges to the area close to the center of the blast furnace, that is, from the outside to the inside; and the discharge order of the charging tank is similar to its charging order, which also starts from the edge of the furnace wall and gradually charges to the center of the blast furnace; therefore, according to the charging tank discharge time curve and the charging pattern of the blast furnace top, the weight distribution curve of the coke along the radial direction of the blast furnace under various working conditions can be drawn to determine the distribution of the material in the radial direction of the blast furnace.

[0062] Step S5, actual blast furnace top charging is performed according to the optimal working condition for the coke dicing charging effect.

[0063] The present invention simulates the working conditions of diced coke entering a blast furnace in different orders, analyzes the distribution behavior and regularity of diced coke during the entire transportation process from the under-trough system into the blast furnace throat, and then determines the optimal working condition for the diced coke distribution effect and applies it in practice. In this way, the diced coke is distributed to the furnace wall and the periphery of the annular belt as much as possible during the blast furnace distribution process, thereby reducing the interference and inhibition of the diced coke on the airflow in the blast furnace combustion center during blast furnace combustion.

[0064] The method for distributing chopped coke to the blast furnace top disclosed in the present invention will be further described in detail below with reference to specific embodiments.

[0065] Example 1

[0066] First, according to the actual size of the blast furnace top charging equipment as well as the ore and coke, a three-dimensional geometric model and a material model were constructed, and the physical property parameters between the materials were configured and optimized as shown in Table 1. Among them, the parameter settings of the ore and the top charging equipment refer to the parameter settings between the ore, and the parameter settings of the coke and the top charging equipment refer to the parameter settings between the coke and the ore. Then, the loading system of the three-car ore was used to simulate the loading process of the three-car ore, and the batch weight of each material in the loading process of the three-car ore was determined, which was 39,000 kg of ore and 1,000 kg of coke. Among them, the first car was loaded with 13,000 kg of ore and 1,000 kg of coke, and the second and third cars were both loaded with 13,000 kg of ore without coke. The simulated particle size and mass distribution of ore and coke in any car material are shown in Tables 2 and 3, respectively.

[0067] Table 1 Material attribute parameter setting table

[0068]

[0069]

[0070] Table 2 Simulated particle size and mass distribution of ore

[0071] Particle size range (mm) 5～10 10～25 25～40 >40 Simulation particle size processing (mm) 7.5 12.5 32.5 50 Proportion 22％ 36％ 29％ 13％ Weight (kg) 8580 14040 11310 5070 Ore weight per car (kg) 2860 4680 3770 1690

[0072] Table 3 Simulated particle size and mass distribution of coke

[0073] Particle size range (mm) 6～10 10～15 15-23 Simulation particle size processing (mm) 8 12.5 19 Proportion 17％ 45％ 38％ Weight (kg) 170 450 380

[0074] The simulation working conditions are as follows: determine that the loading state of the material in the first material car is ore first and coke later, the loading state of the material in the second material car is all ore, and the loading state of the material in the third material car is all ore. Start the simulation according to the above simulation process to obtain simulation data; filter the target parameters related to the residual amount of material in the material tank from the simulation data, and obtain the data of these target parameters from the time when the material tank starts discharging until the time when the material tank completes discharging, separate the data from the residual amount of coke in the material tank, and calculate the coke discharge data based on the separate data of the residual amount of coke, that is, the residual amount of coke in the material tank at the previous moment minus the residual amount of coke in the material tank at the current moment, and the weight of the coke discharged within this fixed time period (such as 0.5s) can be obtained. The results are shown in Table 4 below.

[0075] Table 4 Data on the amount of coke residue in the tank during the discharge cycle and the amount discharged within a fixed time

[0076]

[0077]

[0078] The only difference between Examples 2 to 9 and Example 1 is that the order of charging the coke pieces in the simulated working conditions is different. The specific working condition changes are shown in Table 5 below. For the working conditions of any embodiment, the data of the residual amount of coke pieces in the feed tank under the discharge cycle of Table 4 and the discharge amount within a fixed time are collected respectively, and then the feed tank discharge time curve and the weight distribution curve of the coke pieces along the radial direction of the blast furnace under each working condition are plotted according to the data. The results are shown in FIG. Figure 2 and Figure 3 shown.

[0079] Table 5 Preset working conditions for simulation of the three-car mine loading system of Examples 1-9

[0080] Serial number First material car Second material car The third material car Example 1 Ore first, coke later All ore All ore Example 2 First coke and then ore All ore All ore Example 3 All ore First coke and then ore All ore Example 4 All ore Ore first, coke later All ore Example 5 All ore All ore First coke, then ore Example 6 All ore All ore Ore first, coke later Example 7 Coke ore mixing All ore All ore Example 8 All ore Coke ore mixing All ore Example 9 All ore All ore Coke ore mixing

[0081] from Figure 2 and Figure 3The results shown show that the order in which the coke pieces are loaded into the blast furnace top charging directly affects the order in which they are discharged from the charging tank outlet, that is, the proportion of distribution at different radial positions of the blast furnace; and in combination with Examples 1-9, it is found that the coke piece distribution effect under the working condition of Example 1: the charging state of the material in the first charging car is ore first and then coke pieces, the charging state of the material in the second charging car is all ore, and the charging state of the material in the third charging car is all ore is similar to the working condition of Example 7: the charging state of the material in the first charging car is a mixture of coke pieces and ore, the charging state of the material in the second charging car is all ore, and the charging state of the material in the third charging car is all ore. The coke piece is mostly distributed on the furnace wall, and the distribution gradually decreases from the furnace wall to the center of the blast furnace along the radial direction of the blast furnace. Comprehensive comparison Figure 3 In Examples 1 and 7, Example 1 shows a higher amount of diced coke discharged during the initial discharge phase of the charge tank. Based on the order of charging the charge tanks, the distribution of diced coke to the furnace wall is greater than in Example 7. This clearly demonstrates that diced coke is more distributed to the furnace wall and the periphery of the annular belt during the blast furnace charge distribution process, effectively reducing the interference and suppression of the diced coke on the central airflow during blast furnace combustion. Therefore, the operating conditions of Example 1 are determined to be the optimal conditions for diced coke distribution.

[0082] Another embodiment of the present invention also provides a slag distribution system for blast furnace top distribution, which is composed of Figure 4 As shown, it includes blast furnace top distribution equipment; it also includes:

[0083] A three-dimensional model construction module is used to use three-dimensional modeling software to construct a three-dimensional geometric model of the blast furnace top distribution equipment, construct a material model for the material and set the physical property parameters between the materials to obtain an initial model of the blast furnace top distribution; wherein, the scope of the material model constructed for the material includes ore and coke; a model optimization module is used to optimize the physical property parameters between the materials to fit the actual blast furnace top distribution state and obtain an optimized distribution model; a simulation module is used to preset several working conditions according to the loading state of ore and coke before blast furnace top distribution, and use the optimized distribution model to simulate each working condition in turn according to the actual action process of the furnace top distribution equipment, and output the simulation results of each working condition; an analysis and calculation module is used to analyze the simulation results obtained from the simulation of each working condition, determine the optimal working condition for the coke distribution effect, so that the blast furnace top distribution equipment can actually perform the blast furnace top distribution according to the optimal working condition for the coke distribution effect.

[0084] The above modules cooperate with the blast furnace top distribution equipment to realize the above-mentioned blast furnace top distribution method for coke dicing. The specific implementation principles of each module are consistent with the above-mentioned method process and will not be repeated here.

[0085] For example, the analysis and calculation module determines the optimal working condition for the coke distributing effect, and its execution unit includes: an extraction unit, which is used to extract the simulation data obtained by simulating each working condition, and determine the target parameters and the operating data corresponding to the target parameters; an acquisition unit, which is used to sequentially obtain the weight of the ore and coke remaining in the material tank after distributing at each unit moment according to the time sequence of the material tank discharging; a statistical drawing unit, which is used to count the weight of the ore and coke discharged from the material tank after distributing at each unit moment according to the weight of the ore and coke remaining in the material tank after distributing at each unit moment, and draw the material tank discharging time curve; an analysis and determination unit, which is used to analyze the weight distribution of the coke along the radial direction of the blast furnace under each working condition according to the material tank discharging time curve, and then determine the optimal working condition for the coke distributing effect.

[0086] The coke butt distribution method and system for blast furnace top distribution proposed in the present invention obtain detailed data on the movement trajectories of coke butt and ore that cannot be obtained in actual blast furnace top distribution production through simulation, and explore the laws therein; compared with physical experiments, the simulation of this scheme can obtain full-scale experimental data consistent with actual production, can obtain refined process data, and greatly reduce the experimental labor cost investment, time cost investment, etc.

[0087] While the present invention has been disclosed above with reference to preferred embodiments, this is not intended to limit the present invention. Persons skilled in the art will readily appreciate that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the claims.

Claims

1. A method for distributing coke briquettes to a blast furnace roof, characterized in that: The steps include: 1) Using 3D modeling software, a 3D geometric model is constructed for the blast furnace top charging equipment, a material model is constructed for the materials, and physical property parameters between the materials are set to obtain an initial model of the blast furnace top charging. The material model constructed for the materials includes ore and coke. 2) Optimize the physical property parameters of the materials to fit the actual blast furnace top distribution state and obtain an optimized distribution model; 3) Presetting a number of operating conditions based on the loading status of ore and coke before blast furnace top charging, simulating each operating condition in turn using the optimized charging model according to the actual operation process of the top charging equipment, and outputting the simulation results of each operating condition; 4) Analyze the simulation results obtained from each working condition to determine the optimal working condition for the coke distribution effect; 5) Carry out actual blast furnace top charging according to the optimal working conditions for coke distribution effect.

2. The method for distributing chopped coke to a blast furnace top according to claim 1, characterized in that: The process of determining the optimal working condition for the scorched shreds distribution effect in step 4) includes: Extract simulation data obtained from simulation of each working condition, determine target parameters and operating data corresponding to the target parameters; According to the time sequence of the tank discharge, the weight of the ore and coke remaining in the tank after the discharge at each unit time is obtained in sequence; According to the weight of the ore and coke remaining in the tank after charging at each unit time, the weight of the ore and coke discharged from the tank after charging at each unit time is calculated, and the tank discharge time curve is drawn; According to the discharge time curve of the material tank, the weight distribution of the coke pieces along the radial direction of the blast furnace under various working conditions is analyzed, and then the optimal working condition for the coke piece distribution effect is determined.

3. The method for distributing chopped coke to a blast furnace top according to claim 1, wherein: The process of optimizing the physical property parameters between materials to fit the actual blast furnace top distribution state in step 2) is as follows: Determine the setting objects and parameter contents of the property parameters between materials, wherein the setting objects include ore and ore, ore and coke, coke and coke, ore and furnace top distribution equipment, and coke and furnace top distribution equipment, and the parameter contents include the static friction coefficient, rolling friction coefficient, and restitution coefficient between any group of objects; Experimental verification or trial calculation is used to optimize the numerical values ​​of the material attribute parameters to fit the actual blast furnace top distribution state and obtain the optimized distribution model.

4. The method for distributing chopped coke to a blast furnace top according to claim 1, wherein: The specific process of step 3) presetting several working conditions according to the charging state of ore and coke before blast furnace top charging is as follows: Use a car loading system to determine the number of mine cars, the loading parameters of any car, and the number of preset working conditions; For any working condition, the loading status of the materials in each material car is set respectively; wherein, the loading status of the materials includes coke first and ore later, ore first and coke later, coke and ore mixed, and all ore.

5. The method for distributing chopped coke to a blast furnace roof according to claim 2, wherein: The process of analyzing the weight distribution of coke cubes along the radial direction of the blast furnace under various working conditions according to the charging tank discharge time curve is as follows: according to the charging tank discharge time curve and the blast furnace top charging pattern, the weight distribution curve of coke cubes along the radial direction of the blast furnace under various working conditions is drawn.

6. The method for distributing chopped coke to a blast furnace top according to claim 1, wherein: The step 1) constructs a material model for the material including an ore model and a coke dicing model; The simulated particle sizes of ores of different particle sizes in the ore model are as follows: actual particle size 5-10mm, simulated particle size 7.5mm; actual particle size 10-25mm, simulated particle size 12.5mm; actual particle size 25-40mm, simulated particle size 32.5mm; actual particle size greater than 40mm, simulated particle size 50mm; The simulated particle sizes of coke cubes of different particle sizes in the coke cube model are as follows: actual particle size 6-10 mm, simulated particle size 8 mm; actual particle size 10-15 mm, simulated particle size 12.5 mm; actual particle size 15-23 mm, simulated particle size 19 mm.

7. The method for distributing chopped coke to a blast furnace top according to claim 6, characterized in that: When simulating and analyzing each of the working conditions, the mass proportions of ore models with different simulated particle sizes are: simulated particle size 7.5mm, 22%; simulated particle size 12.5mm, 36%; simulated particle size 32.5mm, 29%; simulated particle size 50mm, 13%; the mass proportions of coke models with different simulated particle sizes are: simulated particle size 8mm, 17%; simulated particle size 12.5mm, 45%; simulated particle size 19mm, 38%.

8. The method for distributing chopped coke to a blast furnace top according to claim 4, characterized in that: When the material car loading system is used to simulate the various working conditions of three-car ore loading, it is determined that the loading state of the material in the first material car is ore first and then coke, the loading state of the material in the second material car is all ore, and the loading state of the material in the third material car is all ore. The preset working conditions are the optimal working conditions for the coke distribution effect.

9. A coke distribution system for blast furnace top distribution, characterized in that: Including blast furnace top burden distribution equipment; also includes: The 3D model building module is used to use 3D modeling software to build a 3D geometric model of the blast furnace top distribution equipment, build a material model for the materials, and set the physical property parameters between the materials to obtain the initial model of the blast furnace top distribution. The material model built for the materials includes ore and coke. The model optimization module is used to optimize the physical property parameters of the materials to fit the actual blast furnace top distribution state and obtain the optimized distribution model; A simulation module is used to preset several working conditions according to the charging status of ore and coke before blast furnace top charging, simulate each working condition in turn using the optimized charging model according to the actual operation process of the furnace top charging equipment, and output the simulation results of each working condition; The analysis and calculation module is used to analyze the simulation results obtained from the simulation of each working condition and determine the optimal working condition for the coke dicing distribution effect, so that the blast furnace top distribution equipment can actually carry out the blast furnace top distribution according to the optimal working condition for the coke dicing distribution effect.

10. The chopped coke distribution system for blast furnace top distribution according to claim 9, characterized in that: The analysis and calculation module determines the execution unit of the optimal working condition for the coke distribution effect, including: An extraction unit is used to extract simulation data obtained from simulation of each working condition, and determine target parameters and operating data corresponding to the target parameters; The acquisition unit is used to sequentially acquire the weight of the ore and coke remaining in the material tank after discharging at each unit time according to the time sequence of the material tank discharge; The statistical drawing unit is used to calculate the weight of the ore and coke pieces discharged from the feed tank after the feed is distributed at each unit time according to the weight of the ore and coke pieces remaining in the feed tank after the feed is distributed at each unit time, and to draw the feed tank discharge time curve; The analysis and determination unit is used to analyze the weight distribution of coke pieces along the radial direction of the blast furnace under various working conditions according to the discharge time curve of the material tank, and then determine the optimal working condition for the coke piece distribution effect.

Images