A method and system for correcting heating furnace billet tracking information

Abstract

This invention provides a method for correcting billet tracking information in a heating furnace, comprising the following steps: the heating furnace process control system tracks the billets in the heating furnace based on the furnace entry signal from the basic automation system and the billet information from the production planning system; when billet information is not tracked, the heating furnace process control system acquires the billet parameter information, billet production plan, and billet position information of the untracked billet, and tracks it; the acquired billet parameter information and billet position information of the untracked billet are used to correct the billet temperature tracking model information, and the billet temperature tracking model calculates the billet temperature of the untracked billet and controls the overall furnace heat load based on the corrected billet temperature tracking model information. This invention also provides a system for correcting billet tracking information in a heating furnace. The method of this invention is simple to implement, highly adaptable, and requires low investment, making it promising for widespread application in all heating furnaces.

Description

Technical Field

[0001] This invention belongs to the field of iron and steel metallurgy, and specifically relates to a method for correcting the tracking information of steel billets in a heating furnace, and also to a system for correcting the tracking information of steel billets in a heating furnace using the method for correcting the tracking information of steel billets in a heating furnace. Background Technology

[0002] Large continuous heating furnaces are crucial equipment in steel rolling mills. Their function is to heat steel billets to temperatures conducive to deformation (the austenitic range), allowing for greater reduction during rolling. This reduces equipment accidents caused by wear and impact, improves mill productivity and operating rates, and consumes less energy. Heating improves the internal structure and properties of the steel billet; inhomogeneous structures and non-metallic inclusions are homogenized through diffusion at high temperatures. Heating temperature and uniformity are indicators of heating quality; well-heated steel is more likely to produce finished products with accurate cross-sectional shapes and precise dimensions.

[0003] The heating furnace and the rolling mill operate continuously, such as Figure 1 As shown, there are anywhere from a few to dozens of steel billets in the heating furnace. With such a large number of steel billets, in automatic control mode, the heating furnace process control system (L2, secondary control system) needs to track the steel billets based on the furnace entry signals (position of the steel billet in the furnace, position of the charging machine, etc.) from the basic automation system (L1, primary control system) and the information collected and recorded by the production planning system (L3, tertiary control system). Otherwise, the process control system cannot complete the tracking and temperature control of each steel billet, leading to production chaos.

[0004] In actual production, malfunctions in the steel loading machine signal or communication anomalies in the basic automation system can lead to situations where there are billets inside the furnace, but the process control system's tracking interface shows no indication or tracking data, preventing automatic identification of the billets within the furnace. Manually loading temporary test steel can also result in the process control system lacking billet tracking information. Current technologies rely on manual recording of billets without tracking signals, which adds extra burden to operators. Sometimes, due to large quantities or inaccurate recording, discrepancies between the actual billet and the billet information occur, leading to batch mixing accidents. Furthermore, the lack of billet tracking information prevents the furnace temperature tracking model from accurately calculating the billet temperature. Operators are forced to rely on the upper limit of the process furnace temperature to control the billet temperature, resulting in increased energy consumption and oxidation loss. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a method for correcting billet tracking information in a heating furnace, and also to provide a system for correcting billet tracking information in a heating furnace using the method for correcting billet tracking information in a heating furnace.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This invention provides a method for correcting billet tracking information in a heating furnace, comprising the following steps:

[0008] (1) The heating furnace process control system tracks the steel billet in the heating furnace based on the furnace entry signal from the basic automation system and the billet information from the production planning system;

[0009] (2) When there is billet information that is not tracked in the heating furnace process control system, the heating furnace process control system obtains the billet parameter information, billet production plan and billet position information of the untracked billet in the heating furnace and tracks it.

[0010] (3) The billet temperature tracking model information of the heating furnace is corrected by using the obtained billet parameter information and billet position information of the untracked billet. The billet temperature tracking model calculates the billet temperature of the untracked billet and controls the heat load of the whole furnace based on the corrected billet temperature tracking model information.

[0011] Furthermore, in step (2), when billet information is not tracked due to the process control system failing to track several existing billet information within the heating furnace:

[0012] The system queries the production planning system for the parameter information of several existing billets that have not been tracked, and the system queries the basic automation system for the location information of several existing billets that have not been tracked, and then inputs them into the process control system.

[0013] Furthermore, in step (2), when there is a billet information that is not tracked due to the need for temporary billets to be put into the furnace, the heating furnace process control system acquires the temporary billet parameter information, the temporary billet production plan, and the temporary billet position information in the heating furnace to track it.

[0014] Furthermore, if the temporary billet parameter information already exists in the heating furnace process control system, the temporary billet parameter information can be used directly and the temporary billet production plan can be obtained directly.

[0015] Furthermore, if the temporary billet parameter information is not present in the heating furnace process control system:

[0016] Input temporary billet parameter information into the heating furnace process control system and send the temporary billet parameter information to the production planning system;

[0017] After receiving the temporary billet parameter information, the production planning system creates a temporary billet production plan and sends it to the heating furnace process control system.

[0018] Furthermore, the temporary billet production plan is also sent to the rolling line process control system at the same time.

[0019] Furthermore, obtaining the temporary billet location information includes the following steps:

[0020] The heating furnace process control system transmits the location information of the existing steel billet closest to the temporary steel billet to be placed in the heating furnace to the basic automation system;

[0021] The basic automation system calculates the temporary billet position information based on the existing billet position information and sends the temporary billet position information to the heating furnace process control system.

[0022] Furthermore, the position of the temporary steel billet is 100-800mm away from the position of the existing steel billet.

[0023] Furthermore, the billet parameter information for untracked billets includes the quantity, steel type, and specifications of the billets.

[0024] The present invention also provides a system for correcting the billet tracking information of a heating furnace using the above-described method for correcting billet tracking information of a heating furnace.

[0025] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0026] (1) The method of the present invention queries the information of steel billets that have not yet been put into the furnace from the production planning system, manually inputs the information of steel billets that have not yet been put into the furnace into the interface of the heating furnace process control system, and corrects the steel billet information into the furnace through the basic process control system (roller conveyor). According to the steel billet information and position already put into the furnace in the production planning system, the current steel billet's position in the furnace is adjusted to ensure that the position is consistent with the actual product, and to ensure that the information tracking and temperature control of each steel billet are completed.

[0027] (2) The method of the present invention does not require major modifications to the process and equipment. It can correct the information of steel billets that are missing ID information in the heating furnace by relying on the existing basic automation system, heating furnace process control system and production planning system. It can achieve stable and continuous production. The process is simple to implement and highly adaptable, with low investment and has the prospect of being promoted and applied to all heating furnaces.

[0028] (3) The present invention forms a set of control technologies that combine equipment and control heating furnace temperature tracking model with basic automation, which are easy to transfer and promote. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of a steel billet inside the heating furnace of the present invention;

[0031] Figure 2 This is a schematic flowchart of the method for correcting the tracking information of steel billets in a heating furnace according to the present invention;

[0032] Figure 3 This is a flowchart illustrating the method for correcting the tracking information of steel billets in a heating furnace according to an embodiment of the present invention. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to specific examples and the accompanying drawings.

[0034] like Figure 2 As shown, the present invention provides a method for correcting billet tracking information in a heating furnace, comprising the following steps:

[0035] (1) The heating furnace process control system tracks the steel billet in the heating furnace based on the furnace entry signal from the basic automation system and the billet information from the production planning system.

[0036] (2) When there is billet information that is not tracked in the heating furnace process control system, the heating furnace process control system acquires the billet parameter information, billet production plan, and billet position information of the untracked billet in the heating furnace, and tracks it. The billet parameter information of the untracked billet includes the quantity, steel type, and specifications of the billet.

[0037] (3) The billet temperature tracking model information of the heating furnace is corrected by using the obtained billet parameter information and billet position information of the untracked billet. The billet temperature tracking model calculates the billet temperature of the untracked billet and controls the heat load of the whole furnace based on the corrected billet temperature tracking model information.

[0038] In step (2), when there is billet information that is not tracked because the process control system has not tracked the information of several existing billets in the heating furnace: query the parameter information of several existing billets that have not been tracked in the production planning system, query the position information of several existing billets that have not been tracked in the basic automation system, and input them into the process control system respectively.

[0039] In step (2), when there is a billet information that is not tracked due to the need for temporary billets to be put into the furnace, the heating furnace process control system acquires the temporary billet parameter information, the temporary billet production plan, and the temporary billet position information in the heating furnace to track it.

[0040] If the temporary billet parameter information already exists in the heating furnace process control system, the temporary billet parameter information is used directly, and the temporary billet production plan is obtained directly. If the temporary billet parameter information does not exist in the heating furnace process control system: the temporary billet parameter information is input into the heating furnace process control system and sent to the production planning system. After receiving the temporary billet parameter information, the production planning system creates a temporary billet production plan and sends it to the heating furnace process control system. In a preferred embodiment, the temporary billet production plan is also sent to the rolling line process control system simultaneously, so that the rolling mill can pre-set the roll pass or plate shape when the billet exits the heating furnace.

[0041] Obtaining the temporary billet position information includes the following steps: The heating furnace process control system transmits the position information of the existing billet closest to the temporary billet to be placed in the heating furnace to the basic automation system. The basic automation system calculates the temporary billet position information based on the existing billet position information and sends the temporary billet position information back to the heating furnace process control system. In this invention, the interval between the two billets is generally 100-800mm, therefore it can be determined that the position of the temporary billet is 100-800mm away from the position of the existing billet.

[0042] The present invention also provides a system for correcting the billet tracking information of a heating furnace using the above-described method for correcting billet tracking information of a heating furnace.

[0043] Example

[0044] This invention addresses the technical problem in steel rolling mills where communication failures in the basic automation system, equipment malfunctions, and the lack of tracking IDs for temporary test billets prevent automatic identification of billets in the heating furnace, thus affecting automated steelmaking and energy consumption. It proposes a technical solution based on the existing basic automation system (L1), heating furnace process control system (L2), and production planning system (L3), and based on the first-in-first-out (FIFO) queue characteristics of billets in the heating furnace, to modify and improve the tracking position of billets within the furnace.

[0045] The overall scheme of the method of the present invention is as follows: Information on steel billets not yet loaded into the furnace is retrieved from the production planning system. This information is then manually input into the interface of the heating furnace process control system. The steel billets are then loaded into the furnace via roller conveyor. Those skilled in the art should understand that the position of the steel billet to be loaded into the furnace can be determined by the position of the preceding steel billet (i.e., the billet closest to the position of the steel billet to be loaded into the furnace). Alternatively, the position of the steel billet to be loaded into the furnace can be determined by the operator and its position information can be manually input. Based on the information and position of the steel billets already loaded into the furnace in the production planning system, the perceived position of the currently loaded steel billet in the furnace is adjusted to ensure consistency between the perceived position and the actual position. Simultaneously, the background processes write the model control table and the furnace position tracking table.

[0046] The specific implementation steps of this invention are as follows:

[0047] like Figure 3 As shown, query the information on billets not yet loaded into the furnace, and check whether billet G1 not yet loaded into the furnace is in the company's rolling plan.

[0048] Furthermore, if so, it can be used directly in the L2 system.

[0049] If not, an application needs to be submitted in the L2 system.

[0050] Add a plan information application interface to the L2 system HMI interface.

[0051] Furthermore, a text control and a command button were added to the C-SHARP development interface.

[0052] The COMMand control is further labeled as a planned information application.

[0053] Furthermore, clicking the button invokes the TCP / IP communication program, which sends the request content (sq1) in the TEXT control to the L3 system.

[0054]

[0055]

[0056]

[0057]

[0058] Furthermore, the L3 system creates a plan based on the application content (sq1) and distributes it to the L2 system and the rolling process control system.

[0059] This allows the rolling mill to pre-set the pass shape or plate shape when the steel billet exits the heating furnace.

[0060] Obtain the most recent furnace location of the billet, DIS1, from the tracking impression map.

[0061] SELECT distance=DIS1FROM FURNACE_TRACK_ACT_T WHERE(distance IN(SELECT MIN(distance)FROM FURNACE_TRACK_ACT_T));

[0062] In terms of manufacturing process, the standard spacing between two steel billets is generally specified as SPACE = 100-800 mm.

[0063] Then the furnace position of the billet entering the furnace is adjusted as follows: DIS2 = DIS1 + SPACE

[0064] Add a text control, MODslab, to the L2HMI interface.

[0065] This window serves as an input window for correcting billet loading information, and also includes a command button for "Data Loading".

[0066]

[0067] Inform the billet temperature tracking model of the billet correction ID information, so that the billet temperature tracking model can perform billet temperature calculation and whole furnace heat load control.

[0068] insert into MODEL_ACT_T(SLAB_NO)values(MODslab.text)

[0069] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples. Within the framework of the invention, technical features of the above embodiments or different embodiments can be combined, and many other variations of the different aspects of the invention as described above exist, which are not provided in the details for the sake of brevity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the protection scope of the invention.

Claims

1. A method of correcting heating furnace billet tracking information, characterized by, Includes the following steps: (1) The heating furnace process control system tracks the steel billets in the heating furnace based on the furnace entry signal from the basic automation system and the billet information from the production planning system; (2) If the process control system fails to track several existing billet information in the heating furnace due to communication abnormalities or equipment abnormalities in the basic automation system, resulting in billet information not being tracked in the heating furnace process control system, query the parameter information of several existing billets that have not been tracked in the production planning system, query the position information of several existing billets that have not been tracked in the basic automation system, and input them into the process control system respectively. (3) The billet parameter information and billet position information of the untracked billet are used to correct the billet temperature tracking model information of the heating furnace. The billet temperature tracking model calculates the billet temperature of the untracked billet and controls the heat load of the whole furnace based on the corrected billet temperature tracking model information.

2. A method of correcting heating furnace billet tracking information, characterized by, Includes the following steps: (1) The heating furnace process control system tracks the steel billets in the heating furnace based on the furnace entry signal from the basic automation system and the billet information from the production planning system; (2) If the billet information in the heating furnace process control system is not tracked due to the need for temporary billets to be added to the furnace, the heating furnace process control system shall acquire the temporary billet parameter information, the temporary billet production plan, and the temporary billet position information in the heating furnace to track it. If the temporary billet parameter information already exists in the heating furnace process control system, then the temporary billet parameter information can be used directly and the temporary billet production plan can be obtained directly. If the temporary billet parameter information is not present in the heating furnace process control system: Input temporary billet parameter information into the heating furnace process control system and send the temporary billet parameter information to the production planning system; after receiving the temporary billet parameter information, the production planning system creates a temporary billet production plan and sends it to the heating furnace process control system. Obtaining the temporary billet location information includes the following steps: The heating furnace process control system transmits the position information of the existing billet closest to the temporary billet to be placed in the heating furnace to the basic automation system; the basic automation system calculates the position information of the temporary billet based on the position information of the existing billet and sends the position information of the temporary billet to the heating furnace process control system. (3) The billet parameter information and billet position information of the untracked billet are used to correct the billet temperature tracking model information of the heating furnace. The billet temperature tracking model calculates the billet temperature of the untracked billet and controls the heat load of the whole furnace based on the corrected billet temperature tracking model information.

3. The method according to claim 2, characterized in that, At the same time, the temporary billet production plan is sent to the rolling line process control system.

4. The method according to claim 2, characterized in that, The temporary billet is located 100-800mm away from the existing billet.

5. The method according to claim 1 or 2, characterized in that, The billet parameter information for untracked billets includes the quantity, steel type, and specifications of the billets.

6. A system for correcting the billet tracking information of a heating furnace using the correction method for billet tracking information of a heating furnace according to any one of claims 1-5.

Images