Self-adaptive blast furnace under-groove inflow correction method, equipment and medium

Abstract

The invention discloses a self-adaptive blast furnace under-groove inflow correction method, equipment and a medium. The method comprises the following steps of: setting material list information; after the under-tank system starts to operate, starting to execute a batching list program, starting a vibrating screen corresponding to the weighing hopper, recording the initial weight of a metering instrument in the weighing hopper, and calculating the theoretical weight of this time; when the displayed weight of the metering device in the weighing hopper reaches the theoretical weight WThe, a vibrating screen stopping command is sent out; the ending weight WEnd is recorded; and the actual material preparation amount WAct = WEnd-WStart is calculated, the material preparation deviation WDelta = WSet-WAct is calculated, if the error is larger than a threshold value, an alarm is given out, and if the error is within the range, automatic correction is carried out, and a full-material signal of the weighing hopper is sent out. The condition that the theoretical value of the weighing hopper in a traditional blast furnace batching system is manually input according to production experience and is continuously corrected in the production process is changed, and the theoretical value of material preparation of the weighing hopper is automatically calculated through the L1 system.

Description

Technical Field

[0001] The invention relates to an adaptive blast furnace underflow correction method, equipment and medium. Background Art

[0002] The common blast furnace under-tank weighing system controls the weight of raw materials, usually manually based on the steel plant's previous production data and raw material test results. When weighing, a weight advance is set for each bucket, and the weighing bucket gate is closed when the advance is reached. The actual weight W_Act is basically close to the theoretical weight W_The.

[0003] The above method is widely used in various types of blast furnace under-tank batching systems in China, but the following problems often occur in production: 1. The anti-wear lining of the under-tank weighing bucket will wear out every time the material is discharged. As the production cycle becomes longer, the degree of wear of the lining is also different, which will eventually cause the discharge speed to change. 2. Due to the influence of various factors, the variety and quality of some raw materials in the ironmaking plant fluctuate greatly. The different physical properties will lead to different discharge speeds of the under-tank batching bin in different production batches. 3. The water content of coke and some powder materials often causes the raw materials in the vibrating screen or feeder to compact and expand. When preparing materials, there may be excessive accumulation of materials in the weighing bucket due to the wall hanging of the weighing bucket bin, and there may also be a sudden collapse of the accumulated materials in the vibrating screen or feeder. These problems will cause sudden fluctuations in the weight of the weighing bucket, and finally cause the abnormality of the automatic correction system.

[0004] Taking the above problems into consideration, the advance amount of each weighing bucket is different, and the operator cannot convert production experience into a more ideal set value. Each weighing bucket needs to go through several large discharge deviations to keep the error within a reasonable range and obtain a suitable theoretical value.

[0005] However, since the moisture content, physical properties and other factors of the raw materials in each weighing bucket are changing to varying degrees during the production process, the discharge speed of each weighing bucket changes to varying degrees. Therefore, the loading operator is still required to observe the material preparation of each weighing bucket in real time and make timely modifications to the theoretical weight W_The. This modification is inaccurate and lagging. There is generally only one loading operator in a modern blast furnace per shift, and it is necessary to pay attention to the batching process under the trough and the top of the furnace at the same time. Therefore, during the production process, the operator has no way to monitor the batching status in real time and adjust the parameters in time. When the cumulative error gradually increases to the level of human perception, a large amount of raw materials have often been put in the blast furnace too much or too little, which may directly affect the furnace condition. Summary of the invention

[0006] In order to overcome the above-mentioned defects, the object of the present invention is to provide an adaptive blast furnace downflow correction method, equipment and medium.

[0007] To achieve the above object, the present invention provides an adaptive blast furnace downflow correction method, wherein the method comprises the following steps:

[0008] Set BOM information;

[0009] After the under-tank system starts running, the batching material list program starts to execute, the vibrating screen corresponding to the weighing bucket is started, and the starting weight of the measuring instrument in the weighing bucket is recorded, and the theoretical weight of this time is calculated: W_The = W_Set + W_Delta - W_BinExc + W_Start; where W_The is the theoretical weight of this time, W_Set is the initial set weight, W_BinExc is the advance amount, W_Delta is the last error, and W_Start is the starting weight;

[0010] Start the corresponding vibrating feeder. When the displayed weight of the metering instrument in the weighing hopper reaches the theoretical weight W_The, a temporary full material signal and a stop command for the vibrating feeder are issued, and then a stop command for the vibrating screen is issued;

[0011] After the vibrating screen stops, the value change of the measuring instrument within the preset time range is automatically monitored. If the change is greater than the preset threshold within the preset time range, it means that there is still residual material on the vibrating screen flowing into the weighing bucket; then continue to monitor until the change is less than the threshold, at which time the end weight W_End is recorded;

[0012] The actual preparation quantity is calculated as W_Act=W_End-W_Start, and the preparation deviation is calculated as W_Delta=W_Set-W_Act. If the error is greater than the threshold, an alarm is issued. If it is within the range, automatic correction is performed and a full weighing hopper signal is issued.

[0013] Furthermore, the following steps are included: obtaining the moisture content of the raw material through a neutron water meter, recording the influence value W_wat, considering the correction upper limit and the error value W_Delta, calculating the value of each correction, distributing it evenly to N adjustments, and sending it to the correction program for processing.

[0014] Furthermore, the method further includes the following steps: calculating the theoretical weight W_The of the next cycle according to the previous cycle.

[0015] Furthermore, the step of setting the material list information specifically includes the following parts: setting the total batch, setting the first half batch, the second half batch and the inserted batch in each batch, setting the weighing bucket number required in each half batch material group, and setting the initial set weight, advance amount, correction upper limit and empty weight of each weighing bucket.

[0016] To achieve the above objectives, the terminal device of the present invention includes a memory, a processor, and a computer program stored in the memory and capable of running on the processor. When the processor loads and executes the computer program, the above-mentioned adaptive blast furnace trough downflow correction method is adopted.

[0017] To achieve the above-mentioned purpose, the present invention provides a computer-readable storage medium, in which a computer program is stored. When the computer program is loaded and executed by a processor, the above-mentioned adaptive blast furnace downflow correction method is adopted.

[0018] The present invention has the following advantages:

[0019] 1. The situation in which the theoretical value of the weighing bucket in the traditional blast furnace batching system is manually entered based on production experience and continuously revised during the production process has been changed. The theoretical value of the weighing bucket material preparation is automatically calculated by the L1 system.

[0020] 2. The delayed stop time of the vibrating screen has been optimized. The time loss can be reduced through an adaptive correction algorithm, and different threshold settings can be made for ore and coke to reduce the uncertainty of manual intervention.

[0021] 3. In special circumstances, if there is a large disturbance or some set values ​​in the material list are incorrectly filled in, resulting in an actual error that is too large, an alarm and prompt will be given.

[0022] 4. When the furnace is not smooth due to other factors and the type and weight of ingredients need to be changed frequently, it has stronger adaptability and can quickly reach a steady state. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the process of the present invention DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0025] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] An adaptive blast furnace downflow correction method disclosed in an embodiment of the present application comprises the following steps:

[0029] Before the batching system is put into operation, the loading operator sets the material list information through the upper computer human-machine interface (HMI), which specifically includes the following parts: setting the total batch, setting the first half batch, the second half batch and the inserted batch in each batch, setting the required weighing bucket number in each half batch material group, setting the initial set weight W_Set, advance amount W_BinExc, correction upper limit and empty weight W_Emp of each weighing bucket (Note: W_Set is calculated based on the material list given by the foreman. Before each material preparation in the weighing bucket, the PLC under the trough will automatically calculate the theoretical production discharge amount W_The and the last error W_Delta).

[0030] After the under-tank system starts running, the batching material list program starts to execute, the vibrating screen corresponding to the weighing bucket is started, and the starting weight W_Start of the measuring instrument in the weighing bucket is recorded, and the theoretical weight W_The = W_Set + W_Delta - W_BinExc + W_Start is calculated.

[0031] Start the corresponding vibrating feeder. When the displayed weight of the metering instrument in the weighing hopper reaches the theoretical weight W_The, a temporary full material signal and a command to stop the vibrating feeder are issued, and then a command to stop the vibrating screen is issued (Note: the vibrating screen can be set with a delayed stop time T1, which is adjusted according to the process requirements).

[0032] After the vibrating screen stops, the value change of the measuring instrument within the time range T2 is automatically monitored. If the change is greater than a specific threshold within the range T1, it means that there is still residual material on the vibrating screen flowing into the weighing hopper (set according to ore and coke respectively), then continue monitoring until the change is less than the threshold, at which time record the end weight W_End.

[0033] The actual preparation quantity is calculated as W_Act=W_End-W_Start, and the preparation deviation is calculated as W_Delta=W_Set-W_Act. If the error is greater than the threshold, an alarm is issued. If it is within the range, automatic correction is performed and a full weighing hopper signal is issued.

[0034] As an improvement of the above embodiment, it also includes: obtaining the water content of the raw material through a neutron water meter, recording the influence amount W_wat, considering the correction upper limit and the error value W_Delta, calculating the value of each correction, evenly distributing it to N adjustments, and sending it to the correction program for processing.

[0035] As an improvement of the above embodiment, it also includes: in the next cycle, the above factors are combined to calculate a new theoretical weight. In this way, all weighing buckets of each material group are controlled respectively, and finally the stability of the raw material ratio is ensured.

[0036] The above batching process is in dynamic change. Due to the change of raw material varieties and physical properties, the system will recalculate the theoretical weight W_The of each weighing bucket every time, and record the weight of the residual raw materials on the vibrating screen flowing into the weighing bucket in time, reducing the time loss caused by manually setting the vibrating screen stop delay and the cumbersome steps of modifying the stop time of each weighing bucket. This method can adaptively adjust the inflow correction for each weighing bucket, shortening the time loss and uncertainty of current manual intervention.

[0037] An embodiment of the present application also discloses a terminal device, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor, wherein the processor adopts the adaptive blast furnace trough downflow correction method of the above embodiment when executing the computer program.

[0038] The terminal device may be a computer device such as a desktop computer, a laptop computer or a cloud server, and the terminal device includes but is not limited to a processor and a memory. For example, the terminal device may also include input and output devices, a network access device and a bus.

[0039] Among them, the processor can adopt a central processing unit (CPU). Of course, according to actual usage, other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. can also be adopted. The general-purpose processor can adopt a microprocessor or any conventional processor, etc., and this application does not impose any restrictions on this.

[0040] Among them, the memory can be an internal storage unit of the terminal device, such as a hard disk or memory of the terminal device, or it can be an external storage device of the terminal device, such as a plug-in hard disk, a smart memory card (SMC), a secure digital card (SD) or a flash memory card (FC) equipped on the terminal device, etc., and the memory can also be a combination of an internal storage unit and an external storage device of the terminal device. The memory is used to store computer programs and other programs and data required by the terminal device. The memory can also be used to temporarily store data that has been output or is to be output, and this application does not impose any restrictions on this.

[0041] Among them, through this terminal device, the adaptive blast furnace trough downflow correction method of the above embodiment is stored in the memory of the terminal device, and is loaded and executed on the processor of the terminal device for the convenience of user use.

[0042] The embodiment of the present application further discloses a computer-readable storage medium, and the computer-readable storage medium stores a computer program, wherein when the computer program is executed by a processor, the adaptive blast furnace downflow correction method of the above embodiment is adopted.

[0043] Among them, the computer program can be stored in a computer-readable medium, the computer program includes computer program code, the computer program code can be in the form of source code, object code, executable file or certain middleware, etc. The computer-readable medium includes any entity or device that can carry the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal and software distribution medium, etc. It should be noted that the computer-readable medium includes but is not limited to the above-mentioned components.

[0044] Among them, the adaptive blast furnace downflow correction method of the above-mentioned embodiment is stored in the computer-readable storage medium through the computer-readable storage medium, and is loaded and executed on the processor to facilitate the storage and application of the adaptive blast furnace downflow correction method.

[0045] The present invention is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of ordinary technicians in the field without departing from the purpose of the present invention. Many other changes and modifications that do not depart from the concept and scope of the present invention should be regarded as the protection scope of the present invention.

[0046] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0047] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An adaptive blast furnace downflow correction method, characterized in that: The method comprises the following steps: Set BOM information; After the under-tank system starts running, the batching material list program starts to execute, the vibrating screen corresponding to the weighing bucket is started, and the starting weight of the measuring instrument in the weighing bucket is recorded, and the theoretical weight of this time is calculated: W_The = W_Set + W_Delta - W_BinExc + W_Start; where W_The is the theoretical weight of this time, W_Set is the initial set weight, W_BinExc is the advance amount, W_Delta is the last error, and W_Start is the starting weight; Start the corresponding vibrating feeder. When the displayed weight of the metering instrument in the weighing hopper reaches the theoretical weight W_The, a temporary full material signal and a stop command for the vibrating feeder are issued, and then a stop command for the vibrating screen is issued; After the vibrating screen stops, the value change of the measuring instrument within the preset time range is automatically monitored. If the change is greater than the preset threshold within the preset time range, it means that there is still residual material on the vibrating screen flowing into the weighing bucket; then continue to monitor until the change is less than the threshold, at which time the end weight W_End is recorded; The actual preparation quantity is calculated as W_Act=W_End-W_Start, and the preparation deviation is calculated as W_Delta=W_Set-W_Act. If the error is greater than the threshold, an alarm is issued. If it is within the range, automatic correction is performed and a full weighing hopper signal is issued.

2. The adaptive blast furnace downflow correction method according to claim 1, characterized in that: The method also includes the following steps: obtaining the water content of the raw material through a neutron water meter, recording the influence value W_wat, considering the correction upper limit and the error value W_Delta, calculating the value of each correction, distributing it evenly to N adjustments, and sending it to the correction program for processing.

3. The adaptive blast furnace downflow correction method according to claim 2, characterized in that: The method also includes the following steps: calculating the theoretical weight W_The of the next cycle based on the previous cycle.

4. The adaptive blast furnace downflow correction method according to claim 1, characterized in that: The steps of setting the material list information specifically include the following parts: setting the total batch, setting the first half batch, the second half batch and the inserted batch in each batch, setting the weighing bucket number required in each half batch material group, and setting the initial set weight, advance amount, correction upper limit and empty weight of each weighing bucket.

5. A terminal device, comprising a memory, a processor, and a computer program stored in the memory and capable of running on the processor, characterized in that: When the processor loads and executes the computer program, the adaptive blast furnace trough downflow correction method described in claim 1 is adopted.

6. A computer-readable storage medium, wherein a computer program is stored in the computer-readable storage medium, characterized in that: When the computer program is loaded and executed by the processor, the adaptive blast furnace trough downflow correction method described in claim 1 is adopted.

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