System and method for optimizing blast furnace tapping structure
Through precise calculation and modular judgment, the blast furnace iron discharge structure is optimized, and the problem of tight pull-down and tank time is solved, ensuring the blast furnace slag iron discharge and normal production.
Patent Information
- Application Number
- CN202411414337.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-11
- Publication Date
- 2025-03-04
AI Technical Summary
Under the high TPC turnover rate, the time for pulling the tank in the middle and late stages of the blast furnace discharge is tight, resulting in emergency blockage of the blast furnace and accidents, and the existing technology lacks accurate judgment and timely response.
By accurately calculating the time required to receive iron to the safe tank capacity and the time required to pull the tank, using the time comparison module, the iron opening judgment module and the slag iron judgment module, we can determine whether the pulling tank meets the iron output requirements, and timely output the instructions for opening the next iron outlet to ensure that the slag iron is discharged.
With high TPC turnover, the blast furnace slag iron is exhausted, avoiding the impact of normal production of blast furnaces, and providing sufficient response time through data support, optimizing the blast furnace iron discharge structure and reducing unnecessary labor.
Smart Images
Figure CN119553020A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of blast furnace ironmaking, and specifically relates to a system and method for optimizing the iron-making structure of a blast furnace, and more particularly to a system and method for optimizing the iron-making structure under a high TPC turnover rate. Background Art
[0002] The current steel industry market is complex and severe. Steel companies have entered an era of inventory game and micro-profit development. Many steel companies have dug deep into their potential and taken various measures to reduce costs and increase efficiency to cope with the cold winter of steel. In order to reduce energy loss at the iron-steel interface, many steel mills have gradually increased the TPC turnover rate to reduce the temperature drop of molten iron and energy consumption. The TPC turnover rate refers to the number of times a single torpedo tank car completes the emptying cycle from the iron plant to the steel plant per unit time. It is an important indicator to measure the operating efficiency of the iron-steel interface. In order to improve the TPC turnover rate, combined with the production characteristics of each blast furnace and the molten iron output, the number of online tanks is dynamically adjusted to ensure the balance of iron and steel.
[0003] During the blast furnace production process, the taphole mud in the iron mouth channel is gradually expanded after being eroded by the slag iron discharged from the furnace. Therefore, the iron speed in the early stage is relatively slow, and the time for iron to reach the safe tank capacity is relatively long. The time for pulling the exchange tank is relatively ample, and the blast furnace iron tapping is not affected. As the iron mouth channel gradually expands, the iron speed gradually increases, especially in the middle and late stages, the iron speed is relatively fast, and the time for pulling the exchange tank is relatively tight. Under the current high TPC turnover rate, sometimes the blast furnace is urgently blocked because the exchange tank is too late. If the blast furnace slag iron cannot be completely discharged, it is easy to cause accidents such as reduced air and oxygen in the furnace and small sleeve burning, which seriously affects the normal production of the blast furnace. Therefore, in the middle and late stages of iron tapping, it is necessary to analyze and judge the iron tapping conditions and the pulling and exchange tank conditions, and take timely measures to ensure that the slag iron is fully discharged and does not affect the normal production of the blast furnace.
[0004] The current way of dealing with the problem is to continuously track the weight of the iron and the position of the torpedo tank during the iron-receiving process and make subjective judgments. Not only does the judgment lack accuracy, it also causes time lags. When it is confirmed that the pull-and-dip tank cannot meet the iron-discharging needs, it is too late to open it immediately, and the only option is to passively block the mouth and reopen it. Summary of the invention
[0005] The purpose of the present invention is to propose a system and method for optimizing the blast furnace tapping organization in view of the shortcomings of the prior art in the case of high TPC turnover rate, such as the tight time for pulling and dispensing tanks in the middle and late stages of blast furnace tapping, which affects the blast furnace tapping, and the lack of accurate judgment and timely response. The method of the present invention accurately calculates the time from receiving iron to safe tank capacity and the time for pulling and dispensing tanks, and judges whether the dispensing tank can meet the tapping requirements and whether the slag iron is exhausted based on the data calculation, so as to make arrangements for the tapping organization. The method of the present invention can ensure that the blast furnace slag iron is exhausted without affecting normal production. At the same time, it is supported by data to provide ample response time, optimize the blast furnace tapping organization, and avoid unnecessary labor.
[0006] The first aspect of the present invention provides a system for optimizing the iron-tapping structure of a blast furnace, the system comprising: a time comparison module, an iron-opening judgment module and a slag-iron judgment module;
[0007] The time comparison module calculates the time required for receiving iron to the safe tank capacity according to the relationship between the blast furnace iron tapping time and the iron speed, and compares the time required for receiving iron to the safe tank capacity with the time required for pulling the exchange tank;
[0008] The tap hole opening judgment module is used to judge that the tapping tank meets the tapping requirements when the time required for receiving iron to the safe tank capacity is greater than the time required for the draw tank, and continue to calculate the subsequent iron speed and the time required for receiving iron to the safe tank capacity, until the time required for receiving iron to the safe tank capacity is less than the time required for the draw tank, and judge that the draw tank cannot meet the tapping requirements, and output an instruction to open the next tap hole for tapping;
[0009] The slag iron judgment module is used to receive an instruction to open the next iron mouth to tap iron, and to judge whether the slag iron of the furnace has been completely tapped. If the slag iron of the furnace has been completely tapped, the iron mouth of the furnace will be blocked normally after the iron reaches the safety tank capacity. If the slag iron of the furnace has not been completely tapped, the iron mouth of the furnace will be reopened after the iron reaches the safety tank capacity.
[0010] Preferably, the time required for receiving iron to the safe tank capacity is calculated according to the relationship between the blast furnace iron tapping time and the iron speed, and the specific method for comparing the time required for receiving iron to the safe tank capacity with the time required for pulling the exchange tank is: using a track scale to calculate the iron tapping flow rate of the blast furnace in real time, and fitting the relationship between the blast furnace iron tapping time and the iron speed according to the iron tapping flow rate of the blast furnace, when the iron mouth is opened, integrating the relationship between the blast furnace iron tapping time and the iron speed to calculate the time required for the first torpedo tank to be full; when the first torpedo tank is full, the time required for the first torpedo tank to be full is used as the updated iron tapping time, and the updated relationship between the iron tapping time and the iron speed is re-fitted according to the iron tapping flow rate of the blast furnace, the updated relationship between the iron tapping time and the iron speed is integrated to calculate the time required for the second torpedo tank to the safe tank capacity, and the time required for the second torpedo tank to reach the safe tank capacity is compared with the time required for pulling the exchange tank after the first torpedo tank is full.
[0011] More preferably, when the time required for receiving iron to the safe tank capacity is ≥ the time required for the pulling and discharging tank, it is determined that the pulling and discharging tank meets the iron-discharging requirements, and the specific method for continuing to calculate the subsequent iron speed and the time required for receiving iron to the safe tank capacity is: when the time required for the second torpedo tank to receive iron to the safe tank capacity is ≥ the time required for the pulling and discharging tank after the first torpedo tank is full, it is determined that the pulling and discharging tank meets the iron-discharging requirements, and so on, until the time required for the nth torpedo tank to receive iron to the safe tank capacity is calculated.
[0012] Further preferably, it is judged whether the slag and iron of the furnace are completely discharged. If the slag and iron of the furnace are completely discharged, the furnace is blocked normally after the iron reaches the safety tank capacity. If the slag and iron of the furnace are not completely discharged, the iron mouth of the furnace is blocked again after the iron reaches the safety tank capacity. The specific method is: if the time required for the nth torpedo tank to reach the safety tank capacity < the time required for the n-1th torpedo tank to be pulled and redistributed after the iron storage capacity of the furnace is ≤50t, it is determined that the slag and iron of the furnace are completely discharged, and the iron mouth of the furnace is blocked normally after the nth torpedo tank receives the iron to the safety tank capacity; when the iron storage capacity of the furnace is >50t, it is determined that the slag and iron of the furnace are not completely discharged, and the iron mouth of the furnace is blocked again after the nth torpedo tank receives the iron to the safety tank capacity.
[0013] The second aspect of the present invention provides a method for optimizing blast furnace tapping structure according to the above-mentioned system, the method comprising:
[0014] The time required for receiving iron to the safe tank capacity is calculated according to the relationship between the blast furnace iron tapping time and the iron speed, and the time required for receiving iron to the safe tank capacity is compared with the time required for pulling the tank;
[0015] When the time required for receiving iron to the safe tank capacity is greater than or equal to the time required for the draw tank, it is determined that the draw tank meets the iron tapping requirements, and the subsequent iron speed and the time required for receiving iron to the safe tank capacity are calculated, until the time required for receiving iron to the safe tank capacity is less than the time required for the draw tank, it is determined that the draw tank cannot meet the iron tapping requirements, and an instruction to open the next tap hole for iron tapping is output;
[0016] Receive the instruction to open the next iron mouth for iron discharge, and judge whether the slag and iron of this furnace have been completely discharged. If the slag and iron of this furnace have been completely discharged, the iron mouth of this furnace will be blocked normally after the iron reaches the safety tank capacity. If the slag and iron of this furnace have not been completely discharged, the iron mouth of this furnace will be reopened after the iron reaches the safety tank capacity.
[0017] Preferably, the time required for receiving iron to the safe tank capacity is calculated according to the relationship between the blast furnace iron tapping time and the iron speed, and the specific method for comparing the time required for receiving iron to the safe tank capacity with the time required for pulling the exchange tank is: using a track scale to calculate the iron tapping flow rate of the blast furnace in real time, and fitting the relationship between the blast furnace iron tapping time and the iron speed according to the iron tapping flow rate of the blast furnace, when the iron mouth is opened, integrating the relationship between the blast furnace iron tapping time and the iron speed to calculate the time required for the first torpedo tank to be full; when the first torpedo tank is full, the time required for the first torpedo tank to be full is used as the updated iron tapping time, and the updated relationship between the iron tapping time and the iron speed is re-fitted according to the iron tapping flow rate of the blast furnace, the updated relationship between the iron tapping time and the iron speed is integrated to calculate the time required for the second torpedo tank to the safe tank capacity, and the time required for the second torpedo tank to reach the safe tank capacity is compared with the time required for pulling the exchange tank after the first torpedo tank is full.
[0018] More preferably, when the time required for receiving iron to the safe tank capacity is ≥ the time required for the pulling and discharging tank, it is determined that the pulling and discharging tank meets the iron-discharging requirements, and the specific method for continuing to calculate the subsequent iron speed and the time required for receiving iron to the safe tank capacity is: when the time required for the second torpedo tank to receive iron to the safe tank capacity is ≥ the time required for the pulling and discharging tank after the first torpedo tank is full, it is determined that the pulling and discharging tank meets the iron-discharging requirements, and so on, until the time required for the nth torpedo tank to receive iron to the safe tank capacity is calculated.
[0019] Further preferably, it is judged whether the slag and iron of the furnace are completely discharged. If the slag and iron of the furnace are completely discharged, the furnace is blocked normally after the iron reaches the safety tank capacity. If the slag and iron of the furnace are not completely discharged, the iron mouth of the furnace is blocked again after the iron reaches the safety tank capacity. The specific method is: if the time required for the nth torpedo tank to reach the safety tank capacity < the time required for the n-1th torpedo tank to be pulled and redistributed after the iron storage capacity of the furnace is ≤50t, it is determined that the slag and iron of the furnace are completely discharged, and the iron mouth of the furnace is blocked normally after the nth torpedo tank receives the iron to the safety tank capacity; when the iron storage capacity of the furnace is >50t, it is determined that the slag and iron of the furnace are not completely discharged, and the iron mouth of the furnace is blocked again after the nth torpedo tank receives the iron to the safety tank capacity.
[0020] In the system and method for optimizing blast furnace iron tapping structure described in the present invention, at least the following are provided:
[0021] Beneficial effects:
[0022] (1) In the present invention, with the support of accurate calculation data, when the torpedo tank receives iron, a judgment can be made based on the iron speed, the empty car position of the torpedo tank and other data, which leaves sufficient response time for the blast furnace operator and avoids the time lag required for human subjective judgment. At the same time, the iron tapping organization is arranged based on the data, which can ensure that the slag iron is fully tapped, avoids the poor iron tapping caused by insufficient human subjective judgment, and ensures the normal production of the blast furnace;
[0023] (2) When the pulling and mixing tank cannot meet the iron tapping requirements, it will be judged whether the slag and iron have been completely tapped. If so, the port will be blocked normally without reopening the port. This avoids the passive reopening of the port due to subjective judgment time lag and reduces the labor intensity of the furnace workers. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 It is a structural block diagram of the system for optimizing the blast furnace iron tapping organization in the present invention;
[0025] Figure 2 It is a flow chart of the method for optimizing blast furnace iron tapping structure in the present invention;
[0026] Figure 3 It is a trend diagram of the relationship between the blast furnace tapping time (150 minutes for tapping) and the iron speed in the embodiment of the present invention;
[0027] Figure 4 This is a trend diagram of the relationship between the updated iron-out time and the iron speed after the first torpedo tank is full (62 minutes) in the embodiment of the present invention;
[0028] Figure 5 This is a trend chart of the relationship between the updated iron-out time (80 minutes) and the iron speed in the embodiment of the present invention. DETAILED DESCRIPTION
[0029] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.
[0030] The first aspect of the present invention provides a system for optimizing the iron-making structure, such as Figure 1 As shown, the system includes: a time comparison module, an iron mouth opening judgment module and a slag iron judgment module; the time comparison module calculates the time required for the iron receiving to reach the safe tank capacity according to the relationship between the blast furnace iron tapping time and the iron speed, and compares the time required for the iron receiving to reach the safe tank capacity with the time required for the drawing and dispensing tank; the iron mouth opening judgment module is used to determine that the drawing and dispensing tank meets the iron tapping requirements when the time required for the iron receiving to reach the safe tank capacity is greater than or equal to the time required for the drawing and dispensing tank, and continue to calculate the subsequent iron speed and the time required for the iron receiving to reach the safe tank capacity, until the time required for the iron receiving to reach the safe tank capacity is less than the time required for the drawing and dispensing tank, and determine that the drawing and dispensing tank cannot meet the iron tapping requirements, and output an indication of opening the next iron mouth for iron tapping; the slag iron judgment module is used to receive the indication of opening the next iron mouth for iron tapping, and to judge whether the slag iron of the furnace is completely tapped, if the slag iron of the furnace is completely tapped, then after the iron receiving reaches the safe tank capacity, the furnace is normally blocked, if the slag iron of the furnace is not completely tapped, then after the iron receiving reaches the safe tank capacity, the iron mouth blocking of the furnace is reopened.
[0031] In a specific implementation of the system of the present invention, the time required for receiving iron to a safe tank capacity is calculated according to the relationship between the blast furnace iron tapping time and the iron speed, and the specific method for comparing the time required for receiving iron to a safe tank capacity with the time required for pulling the exchange tank is as follows: the iron tapping flow rate of the blast furnace is calculated in real time by using a track scale, and the relationship between the blast furnace iron tapping time and the iron speed is obtained by fitting according to the iron tapping flow rate of the blast furnace; when the iron mouth is opened, the relationship between the blast furnace iron tapping time and the iron speed is integrated to calculate the time required for the first torpedo tank to be full; when the first torpedo tank is full, the time required for the first torpedo tank to be full is used as the updated iron tapping time, and the updated relationship between the iron tapping time and the iron speed is refitted according to the iron tapping flow rate of the blast furnace, the updated relationship between the iron tapping time and the iron speed is integrated to calculate the time required for the second torpedo tank to reach the safe tank capacity, and the time required for the second torpedo tank to reach the safe tank capacity is compared with the time required for pulling the exchange tank after the first torpedo tank is full.
[0032] In this article, the specific operation of using a track scale to calculate the iron output flow rate of a blast furnace in real time is as follows: a track scale is installed on the transport track below the iron-receiving torpedo tank in the blast furnace area to measure the weight of the iron-receiving torpedo tank in real time, and data is taken every 5 seconds based on the changes in the real-time weight of the torpedo tank to calculate the iron output flow rate in real time.
[0033] Specifically, since the blast furnace is fixed with taphole mud, the hole expansion law is basically fixed. Therefore, according to the changes in the iron tapping flow rate of the blast furnace, the relationship between the blast furnace iron tapping time and the iron speed can be fitted, and the relationship between the blast furnace iron tapping time and the iron speed can be corrected in real time.
[0034] In this article, the full capacity of the torpedo tank is 280-310t, so the safe capacity of the torpedo tank is set to 240t.
[0035] Specifically, the calculation method for the time required for pulling and redeeming tanks is as follows: after the torpedo tanks are full, the blast furnace notifies the dispatcher to arrange for the train to pull away the full tanks and replace them with empty tanks. The dispatcher optimizes the arrangement of pulling and redeeming tanks according to the position of the train, completes the pulling and redeeming tanks in the shortest time, and calculates the time required for this pulling and redeeming tank according to the train arrangement plan, the position of the train and the route it passes. The speed of an empty torpedo tank car is 10km / h, and the speed of a loaded car is 7km / h.
[0036] In a specific implementation of the system of the present invention, when the time required for receiving iron to the safe tank capacity is ≥ the time required for the pulling and discharging tank, it is determined that the pulling and discharging tank meets the iron output requirements, and the specific method for continuing to calculate the subsequent iron speed and the time required for receiving iron to the safe tank capacity is: when the time required for the second torpedo tank to reach the safe tank capacity is ≥ the time required for the pulling and discharging tank after the first torpedo tank is full, it is determined that the pulling and discharging tank meets the iron output requirements, and so on, until the time required for the nth torpedo tank to reach the safe tank capacity is calculated.
[0037] In a specific implementation of the system of the present invention, it is judged whether the slag and iron of the furnace are exhausted. If the slag and iron of the furnace are exhausted, the furnace is blocked normally after the iron reaches the safety tank capacity. If the slag and iron of the furnace are not exhausted, the iron mouth of the furnace is blocked again after the iron reaches the safety tank capacity. The specific method is: if the time required for the nth torpedo tank to reach the safety tank capacity < the time required for the n-1th torpedo tank to be pulled and redistributed after the iron storage capacity of the furnace is ≤50t, it is determined that the slag and iron of the furnace are exhausted, and the iron mouth of the furnace is blocked normally after the nth torpedo tank receives the iron to the safety tank capacity; when the iron storage capacity of the furnace is >50t, it is determined that the slag and iron of the furnace are not exhausted, and the iron mouth of the furnace is blocked again after the nth torpedo tank receives the iron to the safety tank capacity.
[0038] In this article, iron storage capacity = molten iron production - molten iron discharge, the molten iron production is obtained by multiplying the number of ore batches discharged within the iron-discharging time of the furnace and the iron content of each batch of ore, and the molten iron discharge is calculated based on the cumulative track scale data of the weight change of the torpedo tank receiving iron, that is, the molten iron discharge is the measured weight of the track scale after receiving iron minus the measured weight of the track scale before receiving iron.
[0039] The second aspect of the present invention provides a method for optimizing the blast furnace tapping structure according to the system described above, such as Figure 2 As shown, the method includes:
[0040] The time required for receiving iron to the safe tank capacity is calculated according to the relationship between the blast furnace iron tapping time and the iron speed, and the time required for receiving iron to the safe tank capacity is compared with the time required for pulling the tank;
[0041] When the time required for receiving iron to the safe tank capacity is greater than or equal to the time required for the draw tank, it is determined that the draw tank meets the iron tapping requirements, and the subsequent iron speed and the time required for receiving iron to the safe tank capacity are calculated, until the time required for receiving iron to the safe tank capacity is less than the time required for the draw tank, it is determined that the draw tank cannot meet the iron tapping requirements, and an instruction to open the next tap hole for iron tapping is output;
[0042] Receive the instruction to open the next iron mouth for iron discharge, and judge whether the slag and iron of this furnace have been completely discharged. If the slag and iron of this furnace have been completely discharged, the iron mouth of this furnace will be blocked normally after the iron reaches the safety tank capacity. If the slag and iron of this furnace have not been completely discharged, the iron mouth of this furnace will be reopened after the iron reaches the safety tank capacity.
[0043] The experimental methods or test methods described in the following examples are conventional methods unless otherwise specified; the reagents and materials are obtained from conventional commercial channels or prepared by conventional methods unless otherwise specified.
[0044] Example
[0045] 4000m 3Take the blast furnace as an example. The iron production of this furnace takes 150 minutes. A track scale is installed on the transport track below the iron-receiving torpedo tank in the blast furnace area to measure the weight of the iron-receiving torpedo tank in real time. According to the change of the real-time weight of the torpedo tank, data is taken every 5 seconds to calculate the iron flow rate in real time. The calculated iron speed is shown in Table 1.
[0046] Table 1 Iron flow rate of blast furnace
[0047]
[0048]
[0049] Since the blast furnace is fixed with taphole mud, the hole expansion law is basically fixed. Therefore, according to the change of the iron flow rate of the furnace, the relationship between the blast furnace iron-out time and the iron speed is fitted, as shown in Figure 3 As shown, the relationship between the blast furnace iron-out time and the iron speed is: iron speed = 0.000004 × time 3 -0.0012 × time 2 +0.1609×time+0.7989, correlation R 2 Up to 0.9958;
[0050] Second tank safety capacity time budget:
[0051] After the tap hole is opened, there is no need to replace the torpedo tanks because there are torpedo tanks on both sides. At this time, both torpedo tanks are empty. It takes 62 minutes to fill the first tank. When the first tank is full, the updated trend chart of the relationship between the tapping time and the iron speed is fitted, as shown in the figure below: Figure 4 As shown, the updated relationship between the iron-out time and the iron speed is: iron speed = 0.00003 × time 3 -0.004×time 2 +0.2487×time+0.2352, correlation R 2 is 0.9947. Based on the updated relationship between tapping time and iron speed, it can be calculated that the time it takes for the second tank of iron to tap to a safe tank capacity of 240 t is 28 min.
[0052] Time budget for pulling the can:
[0053] After the first tank is full, the blast furnace notifies the dispatcher to arrange for the train to take away the full tank and replace it with an empty tank. The dispatcher optimizes the arrangement of pulling and replacing tanks according to the train position, and completes the pulling and replacing of tanks in the shortest time. The empty torpedo tank car travels at a speed of 10 km / h, and the full car travels at a speed of 7 km / h; according to the dispatcher's train arrangement plan, the train's location and route, it can be calculated that the information communication and planning arrangement takes 2 minutes, the tank pulling takes 12 minutes, and the tank replacement takes 10 minutes, a total of 24 minutes;
[0054] Determine whether the mixing tank can meet the iron-making requirements:
[0055] At this time, the time for receiving iron to the second tank's safe tank capacity is 28 min ≥ the time for pulling and discharging the tank is 24 min. It is determined that the pulling and discharging tank can meet the iron tapping requirements, and the tapping of the iron hole continues;
[0056] Iron speed real-time update calculation:
[0057] During the iron-discharging process, the iron speed and the full tank time are updated and calculated in real time, and the trend diagram of the change between the updated iron-discharging time 80min and the iron speed is obtained by fitting, as shown in the figure: Figure 5 As shown, the updated relationship between the tapping time 80min and the iron speed is: iron speed = 0.00002 × time 3 -0.003×time 2 +0.2261×time+0.3292, correlation R 2 is 0.9958, the calculated time from iron receiving to safe tank capacity is still 28 minutes, and the time for pulling and withdrawing the tank is still 24 minutes, so it is determined that the taphole continues to tap iron;
[0058] The third tank safety capacity time budget:
[0059] The second tank takes 37 minutes to be full. When the second tank is full, the system can calculate the iron speed change law. According to the iron speed change law, the integral can calculate that the time taken for the third tank to tap iron to a safe tank capacity of 240t is 26 minutes.
[0060] Time budget for pulling the can:
[0061] After the second tank is full, according to the location and route of the train, it can be calculated that the information communication and planning will take 1 minute, the tank pulling will take 12 minutes, and the tank exchange will take 10 minutes, for a total of 23 minutes.
[0062] Determine whether the mixing tank can meet the iron-making requirements:
[0063] At this time, the time of receiving iron to the safe tank capacity is 26min ≥ the time of pulling and discharging tank is 23min, and it is determined that the pulling and discharging tank can meet the iron tapping requirements, and the tapping of the iron hole continues;
[0064] Fourth tank safety capacity time budget:
[0065] It takes 32 minutes to fill the third tank. At this time, the furnace has been tapping for 131 minutes. When the third tank is full, it can be calculated that the time it takes for the fourth tank to tap to a safe tank capacity of 240t is 22 minutes.
[0066] Time budget for pulling the can:
[0067] After the third tank is full, according to the location and route of the train, it can be calculated that the information communication and planning time is 1 minute, the tank pulling time is 12 minutes, and the tank exchange time is 10 minutes, for a total of 23 minutes.
[0068] Determine whether the mixing tank can meet the iron-making requirements:
[0069] At this time, the time from receiving iron to safe tank capacity is 22min < the time for pulling and discharging tank is 23min, and it is determined that the pulling and discharging tank cannot meet the iron tapping requirements. Then the system immediately prompts: open the next tapping hole to tap iron, and the staff on duty immediately organizes the opening;
[0070] Determine whether the slag iron is exhausted:
[0071] At this time, when the pulling and exchange tank cannot meet the iron-discharging requirements, the system requires to open the next taphole immediately to discharge iron; at the same time, the system determines whether the slag and iron of this furnace have been discharged. This furnace has been tapping iron for 131 minutes and 880 tons of iron have been discharged, that is, the molten iron discharge is 880 tons; during this period, the ore batch in the furnace is 120t / ch, each batch contains 73t / ch of iron, 11.9ch of material is discharged within 131 minutes, and the iron content of molten iron is 95%. The calculated molten iron production is 914t; the calculated iron storage capacity = molten iron production - molten iron discharge = 34t≤50t, which determines that the slag and iron of this furnace have been discharged. When the iron reaches the safety tank capacity of 240t, the furnace is blocked normally.
[0072] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various technical features in any other suitable manner, and these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.
Claims
1. A system for optimizing blast furnace tapping structure, characterized in that: The system includes: a time comparison module, an iron opening judgment module and a slag iron judgment module; The time comparison module calculates the time required for receiving iron to the safe tank capacity according to the relationship between the blast furnace iron tapping time and the iron speed, and compares the time required for receiving iron to the safe tank capacity with the time required for pulling the exchange tank; The tap hole opening judgment module is used to judge that the tapping tank meets the tapping requirement when the time required for receiving iron to the safe tank capacity is greater than or equal to the time required for the tapping tank, and continue to calculate the subsequent iron speed and the time required for receiving iron to the safe tank capacity, until the time required for receiving iron to the safe tank capacity is less than the time required for the tapping tank, then judge that the tapping tank cannot meet the tapping requirement, and output an instruction to open the next tap hole for tapping; The slag iron judgment module is used to receive an instruction to open the next iron mouth to tap iron, and to judge whether the slag iron of the furnace has been completely tapped. If the slag iron of the furnace has been completely tapped, the iron mouth of the furnace will be blocked normally after the iron reaches the safety tank capacity. If the slag iron of the furnace has not been completely tapped, the iron mouth of the furnace will be reopened after the iron reaches the safety tank capacity.
2. The system for optimizing blast furnace iron-tapping structure according to claim 1, characterized in that: The time required for receiving iron to the safe tank capacity is calculated according to the relationship between the blast furnace iron tapping time and the iron speed, and the specific method for comparing the time required for receiving iron to the safe tank capacity with the time required for the draw tank is: using a track scale to calculate the iron tapping flow rate of the blast furnace in real time, and fitting the relationship between the blast furnace iron tapping time and the iron speed according to the blast furnace iron tapping flow rate, when the iron mouth is opened, the relationship between the blast furnace iron tapping time and the iron speed is integrated to calculate the time required for the first torpedo tank to be full; When the first torpedo tank is full, the time required for the first torpedo tank to be full is used as the updated iron-discharging time, and the relationship between the updated iron-discharging time and the iron speed is re-fitted according to the iron-discharging flow rate of the blast furnace. The relationship between the updated iron-discharging time and the iron speed is integrated to calculate the time required for the second torpedo tank to reach the safe tank capacity, and the time required for the second torpedo tank to reach the safe tank capacity is compared with the time required to pull the tank after the first torpedo tank is full.
3. The system for optimizing blast furnace iron-tapping structure according to claim 2, characterized in that: When the time required for receiving iron to the safe tank capacity is ≥ the time required for pulling the exchange tank, it is determined that the pulling and exchange tank meets the iron output requirements. The specific method for continuing to calculate the subsequent iron speed and the time required for receiving iron to the safe tank capacity is: when the time required for the second torpedo tank to reach the safe tank capacity is ≥ the time required for pulling the exchange tank after the first torpedo tank is full, it is determined that the pulling and exchange tank meets the iron output requirements, and so on, until the time required for the nth torpedo tank to reach the safe tank capacity is calculated.
4. The system for optimizing blast furnace iron-tapping structure according to claim 3, characterized in that: It is judged whether the slag and iron of the furnace are completely discharged. If the slag and iron of the furnace are completely discharged, the furnace is blocked normally after the iron reaches the safety tank capacity. If the slag and iron of the furnace are not completely discharged, the iron mouth of the furnace is blocked again after the iron reaches the safety tank capacity. The specific method is: if the time required for the nth torpedo tank to reach the safety tank capacity < the time required for the n-1th torpedo tank to be pulled and exchanged after it is full, then when the iron storage capacity of the furnace is ≤50t, it is determined that the slag and iron of the furnace are completely discharged, and the iron mouth of the furnace is blocked normally after the nth torpedo tank receives the iron to the safety tank capacity; when the iron storage capacity of the furnace is >50t, it is determined that the slag and iron of the furnace are not completely discharged, and the iron mouth of the furnace is blocked again after the nth torpedo tank receives the iron to the safety tank capacity.
5. A method for optimizing blast furnace tapping structure according to the system of any one of claims 1 to 4, characterized in that: The method includes: The time required for receiving iron to the safe tank capacity is calculated according to the relationship between the blast furnace iron tapping time and the iron speed, and the time required for receiving iron to the safe tank capacity is compared with the time required for pulling the tank; When the time required for receiving iron to the safe tank capacity is greater than or equal to the time required for the draw tank, it is determined that the draw tank meets the iron tapping requirements, and the subsequent iron speed and the time required for receiving iron to the safe tank capacity are calculated, until the time required for receiving iron to the safe tank capacity is less than the time required for the draw tank, it is determined that the draw tank cannot meet the iron tapping requirements, and an instruction to open the next tap hole for iron tapping is output; Receive the instruction to open the next iron mouth for iron discharge, and judge whether the slag and iron of this furnace have been completely discharged. If the slag and iron of this furnace have been completely discharged, the iron mouth of this furnace will be blocked normally after the iron reaches the safety tank capacity. If the slag and iron of this furnace have not been completely discharged, the iron mouth of this furnace will be reopened after the iron reaches the safety tank capacity.
6. The method for optimizing blast furnace tapping structure according to claim 5, characterized in that: The time required for receiving iron to the safe tank capacity is calculated according to the relationship between the blast furnace iron tapping time and the iron speed, and the specific method for comparing the time required for receiving iron to the safe tank capacity with the time required for the draw tank is: using a track scale to calculate the iron tapping flow rate of the blast furnace in real time, and fitting the relationship between the blast furnace iron tapping time and the iron speed according to the blast furnace iron tapping flow rate, when the iron mouth is opened, the relationship between the blast furnace iron tapping time and the iron speed is integrated to calculate the time required for the first torpedo tank to be full; When the first torpedo tank is full, the time required for the first torpedo tank to be full is used as the updated iron-discharging time, and the relationship between the updated iron-discharging time and the iron speed is re-fitted according to the iron-discharging flow rate of the blast furnace. The relationship between the updated iron-discharging time and the iron speed is integrated to calculate the time required for the second torpedo tank to reach the safe tank capacity, and the time required for the second torpedo tank to reach the safe tank capacity is compared with the time required to pull the tank after the first torpedo tank is full.
7. The method for optimizing blast furnace iron-tapping structure according to claim 6, characterized in that: When the time required for receiving iron to the safe tank capacity is ≥ the time required for pulling the exchange tank, it is determined that the pulling and exchange tank meets the iron output requirements. The specific method for continuing to calculate the subsequent iron speed and the time required for receiving iron to the safe tank capacity is: when the time required for the second torpedo tank to reach the safe tank capacity is ≥ the time required for pulling the exchange tank after the first torpedo tank is full, it is determined that the pulling and exchange tank meets the iron output requirements, and so on, until the time required for the nth torpedo tank to reach the safe tank capacity is calculated.
8. The method for optimizing blast furnace tapping structure according to claim 7, characterized in that: It is judged whether the slag and iron of the furnace are completely discharged. If the slag and iron of the furnace are completely discharged, the furnace is blocked normally after the iron reaches the safety tank capacity. If the slag and iron of the furnace are not completely discharged, the iron mouth of the furnace is blocked again after the iron reaches the safety tank capacity. The specific method is: if the time required for the nth torpedo tank to reach the safety tank capacity < the time required for the n-1th torpedo tank to be pulled and exchanged after it is full, then when the iron storage capacity of the furnace is ≤50t, it is determined that the slag and iron of the furnace are completely discharged, and the iron mouth of the furnace is blocked normally after the nth torpedo tank receives the iron to the safety tank capacity; when the iron storage capacity of the furnace is >50t, it is determined that the slag and iron of the furnace are not completely discharged, and the iron mouth of the furnace is blocked again after the nth torpedo tank receives the iron to the safety tank capacity.