Intelligent control method, device and system for ore smelting furnace holder

Abstract

The present application relates to the technical field of metal smelting, and discloses an intelligent control method, device and system for a holder of an ore smelting furnace, the method comprising: obtaining operating parameters of the holder of the ore smelting furnace; performing three-dimensional quantitative evaluation of arc stability of the holder of the ore smelting furnace according to the operating parameters to determine current arc stability of the holder of the ore smelting furnace; determining a target position adjustment amount and a target pressure release amount of an electrode held by the holder of the ore smelting furnace according to the current arc stability; adjusting the electrode position of the electrode according to the target position adjustment amount, and adjusting the electrode pressure release of the electrode according to the target pressure release amount. The present application can realize accurate control, intelligent decision-making and efficient operation and maintenance of the holder through multi-dimensional comprehensive analysis by the intelligent control system, thereby effectively improving the overall operating performance of the ore smelting furnace and meeting the needs of modern industrial production for high efficiency, energy saving and stable production.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal smelting, and particularly relates to an intelligent control method, device and system for a smelting furnace holder. BACKGROUND

[0002] The smelting furnace is an important industrial equipment for smelting ferroalloy, calcium carbide and yellow phosphorus, etc., and its working principle is to use the electric arc heat and resistance heat generated between the electrode and the furnace charge for high-temperature smelting. The holder, as one of the core components of the smelting furnace, is responsible for holding the electrode and adjusting the depth of the electrode inserted into the furnace charge, and the control precision thereof directly affects the smelting efficiency, product quality and energy consumption level of the smelting furnace.

[0003] However, the current control mode of the smelting furnace holder mostly adopts manual operation or simple automatic control, relies on the experience of the operator, and the control precision cannot be guaranteed, which is difficult to adapt to complex working condition changes. The slow response speed of the electrode position adjustment leads to large current fluctuation, affecting the smelting stability and product quality. At the same time, the lack of state monitoring and fault diagnosis means causes the equipment fault to be not handled in time, increasing the maintenance cost and downtime. In addition, due to the fixed control strategy, dynamic optimization cannot be carried out according to the electrode consumption, furnace charge state and other factors, resulting in high energy consumption. The above existing problems lead to the control of the smelting furnace holder being difficult to meet the needs of modern industrial production for high efficiency, energy saving and stable production. SUMMARY

[0004] The present application provides an intelligent control method, device and system for a smelting furnace holder to solve the problems of insufficient control precision, slow response speed and untimely fault handling in the prior art.

[0005] In a first aspect, the present application provides an intelligent control method for a smelting furnace holder, which comprises: acquiring the operating parameters of the smelting furnace holder; performing three-dimensional quantitative evaluation of the arc stability of the smelting furnace holder according to the operating parameters to determine the current arc stability of the smelting furnace holder; determining the target position adjustment amount and the target pressure release amount of the electrode held by the smelting furnace holder according to the current arc stability; adjusting the electrode position of the electrode according to the target position adjustment amount, and adjusting the electrode pressure release of the electrode according to the target pressure release amount.

[0006] The intelligent control method of the ore smelting furnace holder provided by the application can realize accurate control, intelligent decision and efficient operation of the holder through multi-dimensional comprehensive analysis of the intelligent control system, thereby effectively improving the overall operation performance of the ore smelting furnace and meeting the needs of modern industrial production for efficient, energy-saving and stable production.

[0007] In an optional embodiment, the operating parameters include electrode current and electrode voltage; the three-dimensional quantitative evaluation of the arc stability of the ore smelting furnace holder according to the operating parameters to determine the current arc stability of the ore smelting furnace holder includes: determining the current fluctuation coefficient, arc duration proportion and voltage-current phase matching degree of the ore smelting furnace holder according to the electrode current and electrode voltage; and determining the current arc stability of the ore smelting furnace holder according to the current fluctuation coefficient, arc duration proportion and voltage-current phase matching degree.

[0008] The three-dimensional evaluation model based on the current fluctuation coefficient, arc duration proportion and voltage-current phase matching degree can be constructed to combine the electrical parameters, time parameters and phase relationship, comprehensively evaluate the arc stability of the ore smelting furnace holder, and then adjust the position and pressure release of the motor according to the arc stability.

[0009] In an optional embodiment, the target position adjustment amount includes a target height adjustment amount; the target position adjustment amount and the target pressure release amount of the ore smelting furnace holder are determined according to the current arc stability, including: determining a correction amplitude according to the current arc stability, and calculating the product of the correction amplitude and a height basic adjustment amount to obtain a height correction adjustment amount; determining a weight coefficient according to the current working condition, and determining a height preliminary adjustment amount according to the height correction adjustment amount, the height basic adjustment amount and the weight coefficient; determining the target height adjustment amount according to the height preliminary adjustment amount, the last target height adjustment amount and a preset filtering coefficient; and determining the target pressure release amount according to the target height adjustment amount, a theoretical optimal electrode length and a last electrode length.

[0010] The height adjustment amount and the pressure release amount of the motor are determined to adjust the electrode height, adjust the arc length, maintain the arc stability, adjust the motor pressure release, compensate the electrode consumption and maintain the total length of the electrode, thereby ensuring the long-term effective work of the electrode.

[0011] In an alternative embodiment, before adjusting the electrode position according to the target position adjustment amount and adjusting the electrode pressure release according to the target pressure release amount, the method further comprises: predicting the expected arc stability of the holder of the electric arc furnace after adjusting the electrode position and the electrode pressure release according to the target height adjustment amount and the target pressure release amount, and determining whether the expected arc stability is less than the current arc stability; if so, reducing the target height adjustment amount and the target pressure release amount, and returning to the step of predicting the expected arc stability of the holder of the electric arc furnace after adjusting according to the target height adjustment amount and the target pressure release amount; if the expected arc stability is determined to be less than the current arc stability for a preset number of times in succession, generating a request for manual intervention, otherwise determining the adjusted target height adjustment amount and the target pressure release amount.

[0012] The present application can convert from passive response to active prevention by predicting the adjusted arc stability, avoid over-adjusting the electrode to cause the arc stability to decrease, and reduce the occurrence of problems such as arc fluctuation and working condition disorder caused by blind adjustment.

[0013] In an alternative embodiment, adjusting the electrode position according to the target position adjustment amount comprises: determining a current deviation amount according to the electrode current and a preset current, and determining a height adjustment base amount according to the current deviation amount, the calculation formula being as follows:

[0014]

[0015] Determining an electrode consumption rate according to the target pressure release amount and an electrode pressure release period, and determining a height feedforward compensation amount according to the electrode consumption rate, the calculation formula being as follows:

[0016]

[0017] Determining an actual height adjustment amount according to the height adjustment base amount and the height feedforward compensation amount based on a PID closed-loop adjustment algorithm, the calculation formula being as follows:

[0018]

[0019]

[0020] wherein, the height adjustment base amount is, the current deviation amount is, the preset current position conversion coefficient is, the electrode current is, the preset current is, the height feedforward compensation amount is, the electrode consumption rate is, the target pressure release amount is, the electrode pressure release period is, is a preset time interval, is an actual height adjustment amount, is a first proportional coefficient, is a second proportional coefficient, is a third proportional coefficient, is an electrode height, is a reference height; the electrode height is adjusted according to the actual height adjustment amount until the target height adjustment amount is reached.

[0021] The present application can construct a composite control logic of real-time current feedback, consumption feedforward compensation and PID closed-loop optimization by PID closed-loop control adjustment of the motor height, realize millisecond-level response to arc current fluctuation, avoid slow drift of arc length caused by consumption, control the precision of electrode height adjustment to millimeter level, and thus ensure that the arc length is stably in the optimal interval, avoid invalid power consumption caused by excessively long arc, or excessive consumption of electrodes caused by excessively short arc.

[0022] In an alternative embodiment, the electrode position of the electrode is adjusted according to the target position adjustment amount, further comprising: obtaining a interval distance between the laser range finder and the electrode, the interval distance including a first distance interval and a second distance interval in a first direction, and a third distance interval and a fourth distance interval in a second direction; determining whether the first distance interval is equal to the second distance interval, or whether the third distance interval is equal to the fourth distance interval; if the first distance interval is not equal to the second distance interval, adjusting the horizontal position of the electrode according to the first distance interval and the second distance interval; if the first distance interval is equal to the second distance interval, and the third distance interval is not equal to the fourth distance interval, adjusting the vertical position of the electrode according to the third distance interval and the fourth distance interval.

[0023] The present application can ensure that the electrode always maintains in a precise position by adjusting the horizontal position of the motor, avoid uneven arc caused by horizontal deviation, and thus avoid problems such as local overheating in the furnace and uneven load of three-phase electrodes, and finally improve the electrode position precision and ensure stable smelting of the electric arc furnace.

[0024] In an alternative embodiment, the current fluctuation coefficient, arc duration ratio and voltage-current phase matching degree of the electric arc furnace holder are determined according to the electrode current and the electrode voltage, comprising: calculating the current standard deviation and the current mean value according to the electrode current, and calculating the current fluctuation coefficient according to the current standard deviation and the current mean value, the calculation formula being as follows:

[0025]

[0026] The arc normal discharge time is determined according to the electrode current and the electrode voltage, and the arc duration ratio is calculated according to the arc normal discharge time and the arc continuous discharge time, the calculation formula being as follows:

[0027]

[0028] The voltage standard deviation and the voltage mean value are calculated according to the electrode voltage, and the voltage current phase matching degree is calculated according to the current standard deviation, the current mean value, the voltage standard deviation and the voltage mean value, and the calculation formula is as follows:

[0029]

[0030] wherein, is the current fluctuation coefficient, is the arc duration ratio, is the voltage current phase matching degree, is the electrode current, is the electrode voltage, is the current standard deviation, is the current mean value, is the voltage standard deviation, is the voltage mean value, is the voltage current covariance, is the arc normal discharge time, is the arc continuous discharge time.

[0031] The arc stability evaluation system is constructed from three dimensions of the electric parameter stability, the arc continuity and the parameter coupling by calculating the current fluctuation coefficient, the arc duration ratio and the voltage current phase matching degree, the limitation of traditional single parameter judgment is solved, and the evaluation accuracy of the arc stability is improved, and a reliable basis is provided for subsequent regulation amount calculation.

[0032] In an optional implementation, the current arc stability of the ore smelting furnace holder is determined according to the current fluctuation coefficient, the arc duration ratio and the voltage current phase matching degree, including: the current fluctuation coefficient score is determined according to the current fluctuation coefficient, the arc duration ratio score is determined according to the arc duration ratio, and the voltage current phase matching degree score is determined according to the voltage current phase matching degree, and the score calculation formula is as follows:

[0033]

[0034]

[0035]

[0036] wherein, is the current fluctuation coefficient score, is the arc duration ratio score, The voltage and current phase matching degree is scored; the current fluctuation coefficient score, the arc duration proportion score and the voltage and current phase matching degree score are weighted and summed to obtain the current arc stability.

[0037] The application can convert the current fluctuation coefficient, the arc duration proportion and the voltage and current phase matching degree into corresponding scores, so that the stability judgment is converted from professional parameter interpretation to intuitive score judgment, thereby highlighting the key parameters under different working conditions through weight distribution, solving the evaluation blind area of single parameter meeting but other parameters being abnormal, and realizing comprehensive coverage of multi-dimensional risks.

[0038] In a second aspect, the application provides an intelligent control device for a holder of an electric arc furnace, which comprises: a parameter acquisition module for acquiring operating parameters of the holder of the electric arc furnace; a stability evaluation module for performing three-dimensional quantitative evaluation of arc stability of the holder of the electric arc furnace according to the operating parameters to determine current arc stability of the holder of the electric arc furnace; an adjustment amount determination module for determining a target position adjustment amount and a target pressure release amount of an electrode held by the holder of the electric arc furnace according to the current arc stability; and an intelligent control module for adjusting the electrode position of the electrode according to the target position adjustment amount and adjusting the electrode pressure release of the electrode according to the target pressure release amount.

[0039] In a third aspect, the application provides an intelligent control system for a holder of an electric arc furnace, which comprises: a data acquisition system, an intelligent decision-making system, an execution control system and a man-machine interaction system; the data acquisition system is configured to acquire operating parameters of the holder of the electric arc furnace and send the operating parameters to the intelligent decision-making system; the intelligent decision-making system is connected to the data acquisition system and is configured to perform the intelligent control method for the holder of the electric arc furnace according to the first aspect or any one of the corresponding embodiments thereof; the execution control system is connected to the intelligent decision-making system and is configured to adjust the electrode position and the electrode pressure release of the electrode based on the control instruction of the intelligent decision-making system; and the man-machine interaction system is connected to the data acquisition system, the intelligent decision-making system and the execution control system and is configured to acquire remote control data and perform fault diagnosis according to a preset fault level. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the specific embodiments of the application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0041] Figure 1 is a structural schematic diagram of an intelligent control system for a holder of an electric arc furnace in an application scenario according to an embodiment of the application;

[0042] Figure 2is a first flowchart of an intelligent control method for a holder of a submerged arc furnace according to an embodiment of the present application;

[0043] Figure 3 is a second flowchart of an intelligent control method for a holder of a submerged arc furnace according to an embodiment of the present application;

[0044] Figure 4 is a third flowchart of an intelligent control method for a holder of a submerged arc furnace according to an embodiment of the present application;

[0045] Figure 5 is a schematic diagram of the installation position of a laser range finder in an intelligent control method for a holder of a submerged arc furnace according to an embodiment of the present application;

[0046] Figure 6 is a schematic diagram of the horizontal position offset of an electrode in an intelligent control method for a holder of a submerged arc furnace according to an embodiment of the present application;

[0047] Figure 7 is a schematic diagram of the electrode AB direction adjustment in an intelligent control method for a holder of a submerged arc furnace according to an embodiment of the present application;

[0048] Figure 8 is a schematic diagram of the electrode CD direction adjustment in an intelligent control method for a holder of a submerged arc furnace according to an embodiment of the present application;

[0049] Figure 9 is a structural block diagram of an intelligent control device for a holder of a submerged arc furnace according to an embodiment of the present application;

[0050] Figure 10 is a schematic diagram of the hardware structure of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0051] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, any other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0052] It can be understood that, before using the technical solutions disclosed in the embodiments of the present application, the type, use range, use scenario, and the like of the personal information involved in the present application should be informed to the user and the authorization of the user should be obtained through appropriate means according to relevant laws and regulations.

[0053] The terms "first", "second", "third", etc. are used only for descriptive purposes and do not connote or imply relative importance or a number of the indicated technical features. Thus, features defined with "first", "second" or "third" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0054] As an optional application scenario of the embodiments of the present application, the embodiments of the present application provide a smelting furnace holder intelligent control system, as shown in Figure 1 The smelting furnace holder intelligent control system includes a data acquisition system, an intelligent decision system, an execution control system and a man-machine interaction system. The data acquisition system is used to acquire the running parameters of the smelting furnace holder and send the running parameters to the intelligent decision system. The intelligent decision system is connected with the data acquisition system and is used to execute the intelligent control method of the smelting furnace holder according to the embodiments of the present application. The execution control system is connected with the intelligent decision system and is used to adjust the electrode position and electrode pressure release of the electrode based on the control instruction of the intelligent decision system. The man-machine interaction system is connected with the data acquisition system, the intelligent decision system and the execution control system and is used to acquire remote control data and perform fault diagnosis according to a preset fault level.

[0055] According to the embodiments of the present application, a smelting furnace holder intelligent control method is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described herein can be executed in an order different from that shown herein.

[0056] In the present embodiment, a smelting furnace holder intelligent control method is provided, which can be used in the intelligent decision system of the smelting furnace holder intelligent control system described above, Figure 2 The smelting furnace holder intelligent control method according to the embodiments of the present application is shown in the flowchart as Figure 2 The flowchart includes the following steps:

[0057] In step S201, the running parameters of the smelting furnace holder are acquired.

[0058] Specifically, in the embodiment of the present application, the ore smelting furnace holder holds the electrode into the furnace charge, and the lower end of the electrode contacts the furnace charge to generate an electric arc, which in turn heats the furnace charge. During the heating process, the electrode will continue to consume under the high-temperature arc, and the length will gradually shorten. Therefore, in order to ensure the stability of the arc, the running parameters of the ore smelting furnace holder and related equipment are collected in real time by a data acquisition system, and an intelligent decision system is connected with the data acquisition system to receive the collected running parameters, including electrode position, electrode current, electrode voltage and holder temperature. Among them, the data acquisition system includes a position sensor, a current sensor, a voltage sensor and a temperature sensor, all of which adopt digital output mode and the data collection frequency is not less than 100Hz.

[0059] In some optional embodiments, the position sensor adopts a high-precision laser range finder, which can measure the position change of the electrode with millimeter-level precision, and monitor the vertical position and horizontal position of the electrode in real time. The monitoring of the vertical position can ensure that the electrode maintains a suitable insertion depth in the furnace, and the monitoring of the horizontal position can prevent the electrode from deviating during operation. The position sensor outputs the electrode position data to the intelligent decision system in the form of a digital signal; the current sensor adopts a Hall effect current sensor, which is used to measure the current flowing through the electrode in real time; the voltage sensor adopts a Hall effect voltage sensor, which is used to measure the voltage flowing through the electrode in real time; the current and voltage are key parameters in the operation of the ore smelting furnace, and their stability directly affects the smelting efficiency and product quality; the temperature sensor adopts a thermocouple or a thermal resistance temperature sensor, which is used to monitor the temperature of the holder and the electrode in real time. High temperature environment is a typical feature of the operation of the ore smelting furnace, and the temperature sensor can help the system to understand the working state of the equipment in real time, prevent equipment damage caused by overheating, and convert the temperature data into a digital signal for transmission to the intelligent decision system.

[0060] Step S202, according to the running parameters, the arc stability of the ore smelting furnace holder is three-dimensionally quantitatively evaluated, and the current arc stability of the ore smelting furnace holder is determined.

[0061] Specifically, in the embodiment of the present application, the current fluctuation coefficient, arc duration ratio and voltage-current phase matching degree are calculated based on the electrode current and electrode voltage, and then the arc stability is three-dimensionally quantitatively evaluated based on the current fluctuation coefficient, arc duration ratio and voltage-current phase matching degree. Among them, the current fluctuation coefficient directly reflects the fluctuation of the arc length, the more stable the arc is, the smaller the current fluctuation is; the continuous combustion of the arc is the premise of normal smelting, and the arc will cause the furnace temperature to drop suddenly, and the arc duration ratio quantifies the continuity of the arc through the normal discharge time ratio; under normal arc, voltage and current are negatively correlated, that is, the arc lengthens, the voltage rises, and the current decreases, and vice versa. If the voltage-current phase matching degree is abnormal, it means that the electrode is not conducting well or the working condition in the furnace is abnormal.

[0062] In some optional embodiments, the current arc stability of the ore smelting furnace holder is determined according to the current fluctuation coefficient, the arc duration proportion, and the voltage-current phase matching degree, and then the arc stability is taken as a reference to determine whether the electrode needs to be adjusted and the adjustment degree, so as to ensure the stability of the arc.

[0063] In step S203, the target position adjustment amount and the target pressure release amount of the electrode held by the ore smelting furnace holder are determined according to the current arc stability.

[0064] Specifically, in the embodiments of the present application, the target position adjustment amount and the target pressure release amount of the electrode are determined according to the current arc stability, wherein the target position adjustment amount is mainly height adjustment, and the core purpose is to optimize the arc length by fine-tuning the electrode height, directly improving the current arc stability; the core purpose of the target pressure release amount is to compensate for the electrode consumption, and to provide sufficient electrode length basis for height adjustment, avoiding the failure of height adjustment due to the shortness of the electrode. In actual operation, the worse the arc stability, the greater the correction range of height adjustment; the cumulative amount of height adjustment indirectly reflects the electrode consumption speed, which is the core basis for pressure release amount calculation.

[0065] In step S204, the electrode position of the electrode is adjusted according to the target position adjustment amount, and the electrode pressure release of the electrode is adjusted according to the target pressure release amount.

[0066] Specifically, in the embodiments of the present application, after the intelligent decision system determines the target position adjustment amount and the target pressure release amount according to the arc stability, the target position adjustment amount and the target pressure release amount are sent to the execution control system. The execution control system first pushes the electrode downward by the target pressure release amount through the loosen-pull-clamp action of the holder, to compensate for the length consumed by high temperature.

[0067] In some optional embodiments, when the electrode position is adjusted, the electrode height of the ore smelting furnace directly affects the arc length, and then affects the current and voltage, and finally affects the arc stability. However, there are many interference factors in actual working conditions, such as changes in furnace charge, electrode consumption, external disturbances, etc., which will make height adjustment complex. Therefore, in order to ensure the accuracy of height adjustment, the embodiments of the present application determine the fine-tuning height of the electrode based on the PID closed-loop adjustment algorithm, and send it to the execution control system, which gradually adjusts the height of the electrode to adapt to the nonlinear working condition of the electrode, and finally obtains the target height adjustment amount. As for the adjustment of the horizontal position of the electrode, the embodiments of the present application detect the horizontal offset of the electrode through the laser range finder, drive the horizontal adjustment mechanism (such as a horizontal servo motor) to correct, and ensure that the electrode is aligned with the center of the furnace.

[0068] The intelligent control method of the ore smelting furnace holder provided by the application can realize accurate control, intelligent decision and efficient operation of the holder through multi-dimensional comprehensive analysis of the intelligent control system, thereby effectively improving the overall operation performance of the ore smelting furnace and meeting the needs of modern industrial production for efficient, energy-saving and stable production.

[0069] In the embodiment, an intelligent control method of an ore smelting furnace holder is provided, which can be used for the intelligent decision system of the intelligent control system of the ore smelting furnace holder, Figure 3 The flowchart of the intelligent control method of the ore smelting furnace holder according to the embodiment of the application is shown in Figure 3 The flowchart includes the following steps:

[0070] In step S301, the operation parameters of the ore smelting furnace holder are obtained. For details, refer to step S201 of the embodiment shown in Figure 2 The details are not described herein again.

[0071] In step S302, the arc stability of the ore smelting furnace holder is three-dimensionally quantitatively evaluated according to the operation parameters, and the current arc stability of the ore smelting furnace holder is determined.

[0072] Specifically, the above step S302 includes:

[0073] In step S3021, the current fluctuation coefficient, arc duration ratio and voltage-current phase matching degree of the ore smelting furnace holder are determined according to the electrode current and electrode voltage.

[0074] Specifically, in the embodiment of the application, the current fluctuation coefficient is the ratio of the discrete degree to the average level of the electrode current, which is used to measure the fluctuation intensity of the current in a period of time and directly reflects the stability of the arc length; the arc duration ratio is the ratio of the normal arc discharge time to the total discharge time, which is used to measure whether the arc is continuously burned in a period of time and avoid the evaluation blind area of frequent arc breaking although the instantaneous parameters meet the standard; the voltage-current phase matching degree is the linear correlation coefficient of the electrode voltage and current, which is used to measure the synchronization of the two and reflect the inherent stability of the arc.

[0075] In some optional embodiments, the above step S3021 includes:

[0076] In step a1, the current standard deviation and current mean value are calculated according to the electrode current, and the current fluctuation coefficient is calculated according to the current standard deviation and current mean value.

[0077] Step a2, determine the normal arc discharge time according to the electrode current and electrode voltage, and calculate the arc duration ratio according to the normal arc discharge time and the arc continuous discharge time.

[0078] Step a3, calculate the voltage standard deviation and voltage mean value according to the electrode voltage, and calculate the voltage current phase matching degree according to the current standard deviation, current mean value, voltage standard deviation and voltage mean value.

[0079] Specifically, in the embodiments of the present application, the calculation formula of the current fluctuation coefficient is as follows:

[0080]

[0081] Among them, is the current fluctuation coefficient, is the current standard deviation, is the current mean value. The current mean value and the current standard deviation The calculation formula is as follows:

[0082]

[0083]

[0084] Among them, is the electrode current, is the arc continuous discharge time The number of collected data.

[0085] In some optional embodiments, the calculation formula of the arc duration ratio is as follows:

[0086]

[0087] Among them, is the arc duration ratio, is the normal arc discharge time, if the electrode voltage And the electrode current It is considered as normal discharge, record the normal arc discharge time, is the arc continuous discharge time.

[0088] In some optional embodiments, the calculation formula of the voltage current phase matching degree is as follows:

[0089]

[0090] Among them, is the voltage current phase matching degree, is the voltage standard deviation, is the voltage mean value, is the voltage current covariance. The voltage mean value and voltage standard deviation The calculation formula is as follows:

[0091]

[0092]

[0093] Step S3022: Determine the current arc stability of the electric arc furnace holder based on the current fluctuation coefficient, the arc duration ratio, and the voltage-current phase matching degree.

[0094] Specifically, in this embodiment of the invention, a three-dimensional quantitative evaluation system for arc stability is constructed based on the current fluctuation coefficient, the arc duration ratio, and the voltage-current phase matching degree. To facilitate comprehensive analysis, each parameter is converted into a score.

[0095] In some optional implementations, step S3022 above includes:

[0096] Step b1: Determine the current fluctuation coefficient score based on the current fluctuation coefficient, determine the arc duration percentage score based on the arc duration percentage, and determine the voltage and current phase matching degree score based on the voltage and current phase matching degree.

[0097] Step b2 involves weighted summation of the current fluctuation coefficient score, the arc duration percentage score, and the voltage-current phase matching score to obtain the current arc stability.

[0098] Specifically, in this embodiment of the invention, the current fluctuation coefficient is scored. The calculation formula is as follows:

[0099]

[0100] It can be seen that the current fluctuation coefficient The smaller the value, the better the current stability. 5% is the ideal current stability threshold, and 10% is the unstable threshold. This is just an example and is not a limitation.

[0101] In some alternative implementations, the formula for calculating the arc duration percentage score is as follows:

[0102]

[0103] It can be seen that the arc duration accounts for a certain percentage The higher the value, the better the arc continuity. 95% is the ideal arc continuity threshold, and 80% is the minimum continuity threshold. This is just an example and is not a limitation.

[0104] In some alternative implementations, voltage-current phase matching is scored. The calculation formula is as follows:

[0105]

[0106] visible, The value range is [0,1], and the closer it is to 1, the better the coordination between voltage and current.

[0107] Furthermore, the current arc stability is obtained by weighting and summing the current fluctuation coefficient score, the arc duration ratio score, and the voltage-current phase matching degree score based on preset weighting coefficients. The calculation formula is shown below:

[0108]

[0109] in, This is the weight for the current fluctuation coefficient, with a value of 0.4. The weighting for the arc duration is 0.35. The voltage-current phase matching weight is 0.25, which is only an example and not a limitation. Current arc stability. The value range is [0, 100]. In this embodiment of the invention, arc stability is divided into different levels, as shown in the table below:

[0110] Table 1 Classification of Arc Stability Levels

[0111]

[0112] Step S303: Determine the target position adjustment amount and target pressure release amount of the electrode held by the electric arc furnace holder based on the current arc stability.

[0113] Specifically, step S303 includes:

[0114] Step S3031: Determine the correction range based on the current arc stability, and calculate the product of the correction range and the basic height adjustment amount to obtain the height correction adjustment amount.

[0115] Specifically, in this embodiment of the invention, based on the current arc stability The degree of correction is determined by the classification of levels. According to the arc stability level from best to worst, the correction range is... The values ​​were successively taken as 1, 1.1, 1.3, 1.4, and 2. The correction magnitude was then calculated. and height base adjustment amount The product of these two values ​​yields the highly corrected adjustment amount. ,Right now in The value is 1.5mm, but is not limited to this.

[0116] Step S3032: Determine the weighting coefficient based on the current working conditions, and determine the initial height adjustment amount based on the height correction adjustment amount, the basic height adjustment amount, and the weighting coefficient.

[0117] Specifically, in this embodiment of the invention, the current operating condition of the electric arc furnace is obtained. If it is a normal operating condition, then the weighting coefficient is... The value is 0.7. If it is an abnormal operating condition, the weighting coefficient is... The value is set to 0.3. The adjustment amount is then corrected based on the height. Basic height adjustment and weighting coefficients Determine the initial height adjustment amount The calculation formula is as follows:

[0118]

[0119] Step S3033: Determine the target height adjustment amount based on the initial height adjustment amount, the previous target height adjustment amount, and the preset filter coefficient.

[0120] Specifically, in this embodiment of the invention, a preset filtering coefficient is determined. The initial adjustment value is set to 0.6 to eliminate abrupt changes in the adjustment amount, but this is not a limiting factor. The initial adjustment amount is based on the height. Target height adjustment amount and preset filter coefficients Determine the target height adjustment amount The calculation formula is as follows:

[0121]

[0122] Step S3034: Determine the target discharge amount based on the target height adjustment amount, the theoretical optimal electrode length, and the previous electrode length.

[0123] Specifically, in this embodiment of the invention, the theoretically optimal electrode length is obtained. and the length of the previous electrode Adjust the amount according to the target height Theoretical optimal electrode length and the length of the previous electrode Determine the target pressure release amount The calculation formula is as follows:

[0124]

[0125] The embodiments of the present invention aim to improve or maintain arc stability by adjusting the electrode position in real time and periodically compensating for electrode consumption.

[0126] Step S304, the expected arc stability of the holder of the electric arc furnace after adjusting the electrode position and electrode pressure release is predicted according to the target height adjustment amount and the target pressure release amount, and it is determined whether the expected arc stability is less than the current arc stability.

[0127] Specifically, in the embodiment of the present application, the expected arc stability of the holder of the electric arc furnace after adjusting the electrode position and electrode pressure release is obtained by prediction according to the target height adjustment amount and the target pressure release amount through theoretical formula calculation or model prediction, etc.

[0128] Step S305, if less, the target height adjustment amount and the target pressure release amount are reduced, and the step of predicting the expected arc stability of the holder of the electric arc furnace after adjusting is returned to the step of predicting the expected arc stability according to the target height adjustment amount and the target pressure release amount.

[0129] Specifically, in the embodiment of the present application, if the expected arc stability is less than the current arc stability , it is proved that after adjusting the electrode position and electrode pressure release according to the target height adjustment amount and the target pressure release amount, the arc stability of the holder of the electric arc furnace will be reduced, so it is possible to be adjusted too much. At this time, the target height adjustment amount and the target pressure release amount are halved, and the prediction is performed again.

[0130] Step S306, if the expected arc stability is determined to be less than the current arc stability for a continuous preset number of times, a manual intervention request is generated, otherwise the adjusted target height adjustment amount and the target pressure release amount are determined.

[0131] Specifically, in the embodiment of the present application, if the expected arc stability obtained after halving the target height adjustment amount and the target pressure release amount is less than the current arc stability , the halved target height adjustment amount and the target pressure release amount are taken as the final target height adjustment amount and the target pressure release amount. If the expected arc stability obtained after halving for three times is still less than the current arc stability , it is indicated that the arc cannot be stabilized by adjustment at this time, so a manual intervention request is generated and sent to the man-machine interaction system, and the man-machine interaction system sends a manual intervention reminder to the user.

[0132] ​​​In some optional embodiments, the human-computer interaction system is connected with the data acquisition system and the intelligent decision system respectively, for realizing the operation state visualization, the three-level fault grading protection and the post-fault adaptive reset, and can realize the remote data transmission, the state monitoring and the control parameter configuration, and based on the preset different level thresholds, automatically executes the protection measures according to the parameter abnormal type. The human-computer interaction system detects the abnormality according to the electrode height, the electrode current, the holder temperature and the current arc stability, judges whether the corresponding preset threshold is exceeded. When the abnormal parameter is detected, the fault diagnosis program is started, the fault type and the position are determined, and the corresponding protection measures are automatically executed according to the fault level, including the alarm prompt, the power reduction operation or the emergency shutdown. The parameters and the corresponding preset thresholds are shown in Table 2.

[0133] Table 2 Threshold setting of key parameters

[0134]

[0135] wherein, I e is the rated electrode current, T is the holder temperature, h is the electrode height, h min is the electrode minimum position, h max is the electrode maximum position, the operation parameters are monitored every 5 ms, and the arc stability S is evaluated every second. Further, the fault type is judged according to the abnormal parameter, if I > 1.2 I e and U < 10 V, it is determined that the electrode is short-circuited; if U > 2 U e and I < 500 A, it is determined that the electrode is open-circuited; if TIf the temperature is greater than 140 DEG C and the cooling water flow rate is less than the minimum flow rate, it is determined that the cooling water system is faulty. As shown in Table 2, the embodiment of the present application classifies the fault into three levels of mild, moderate and severe according to different thresholds, the mild fault adopts a yellow indicator light + intermittent buzzer alarm, displays the fault code on the man-machine interaction interface, and reduces the adjustment range and prolongs the adjustment interval, the moderate fault adopts a red indicator light + continuous buzzer alarm, pushes the alarm information to the remote control unit, and automatically reduces the power of the electric arc furnace to 80%, limits the electrode adjustment range, and immediately starts the safety shutdown program when a serious fault is detected, cuts off the electrode power supply, opens the emergency cooling, locks the actuator, and prohibits any adjustment operation. After troubleshooting, the system resets according to the process of "low power trial operation -> rated power recovery", and records the fault log. Users can view the system running state in real time through the man-machine interaction system, including the running parameters collected by the data acquisition system, the evaluation results and control instructions of the intelligent decision system, and the execution of the execution control system.

[0136] Step S307, adjusting the electrode position of the electrode according to the target position adjustment amount, and adjusting the electrode pressure release of the electrode according to the target pressure release amount. For details, please refer to step S307 of the embodiment shown in Figure 2 Step S204 of the embodiment shown in

[0137] The intelligent control method of the electric arc furnace holder provided by the present application can realize accurate control, intelligent decision and efficient operation of the holder through multi-dimensional comprehensive analysis of the intelligent control system, thereby effectively improving the overall operation performance of the electric arc furnace and meeting the needs of modern industrial production for high efficiency, energy saving and stable production.

[0138] In the present embodiment, an intelligent control method of an electric arc furnace holder is provided, which can be used for the intelligent decision system of the intelligent control system of the electric arc furnace holder described above, Figure 4 is a flowchart of the intelligent control method of the electric arc furnace holder according to the embodiment of the present application, as shown in Figure 4 The flowchart includes the following steps:

[0139] Step S401, acquiring the running parameters of the electric arc furnace holder. For details, please refer to step S401 of the embodiment shown in Figure 3 Step S301 of the embodiment shown in

[0140] Step S402, performing three-dimensional quantitative evaluation of the arc stability of the electric arc furnace holder according to the running parameters, and determining the current arc stability of the electric arc furnace holder. For details, please refer to step S402 of the embodiment shown in Figure 3Step S302 of the illustrated embodiment, which will not be repeated here.

[0141] Step S403, according to the current arc stability, determine the target position adjustment amount and the target release amount of the electrode held by the holder of the electric arc furnace. For details, please refer to Figure 3 Step S303 of the illustrated embodiment, which will not be repeated here.

[0142] Step S404, adjust the electrode position of the electrode according to the target position adjustment amount, and adjust the electrode release of the electrode according to the target release amount.

[0143] Specifically, the above step S404 includes:

[0144] Step S4041, determine the current deviation amount according to the electrode current and the preset current, and determine the height adjustment basis amount according to the current deviation amount.

[0145] Specifically, in the embodiment of the present application, the electrode height adjustment is used to change the electrode height position by adjusting the electrode lifting, so as to adjust the arc length and maintain the arc stability. In order to accurately control the electrode height, first, according to the electrode current and the current deviation amount of the preset current , the height adjustment basis amount is calculated, and the calculation formula is as follows:

[0146]

[0147] , wherein, is the preset current position conversion coefficient, which is 0.001 mm / A, but is not limited to this. It can be seen that when , the electrode rises, and when , the electrode falls.

[0148] Step S4042, determine the electrode consumption rate according to the target release amount and the electrode release period, and determine the height feedforward compensation amount according to the electrode consumption rate.

[0149] Specifically, in the embodiment of the present application, the electrode release is adjusted based on the target release amount to compensate for the electrode consumption and maintain the total length of the electrode. However, the electrode will continue to consume due to high temperature melting, oxidation and reaction with the charge in smelting. The target release amount directly reflects the total amount of actual consumption of the electrode in the release period, so when adjusting the electrode height, the actual consumption of the electrode needs to be considered, and then the actual consumption of the electrode is quantified into the electrode height adjustment process, so as to adjust the electrode height in advance before the arc length and the current are reduced due to the electrode consumption, and avoid adjustment lag. The calculation formula of the height feedforward compensation amount is as follows:​​​

[0150]

[0151] wherein, is the electrode consumption rate, is the electrode discharge period, is a preset time interval, which is 5s but is not limited thereto. That is, according to the electrode consumption rate, it is determined that the electrode will consume in the next 5 seconds, the electrode is adjusted downward in advance to maintain the distance from the lower end of the electrode to the molten pool unchanged, so as to avoid the arc lengthening and the current decreasing due to consumption.

[0152] In step S4043, the actual height adjustment amount is determined based on the PID closed-loop adjustment algorithm according to the height adjustment base amount and the height feedforward compensation amount.

[0153] Specifically, in the embodiment of the present application, the feedforward compensation can only cope with the predictable fixed disturbance, but in actual work, there are also dynamic deviations, execution errors and unknown disturbances that cannot be covered by feedforward, therefore, based on the PID closed-loop adjustment algorithm, the two cooperate to realize the composite control of "prediction + correction", and dynamically adjust the holder lifting speed to ensure the accuracy and stability of the electrode height adjustment. The formula corresponding to the PID closed-loop adjustment algorithm is as follows:

[0154]

[0155]

[0156] wherein, is the actual height adjustment amount, is the first proportional coefficient, is the second proportional coefficient, is the third proportional coefficient, is the electrode height, is the reference height. When the electrode current and the set current deviation > 5%, the first proportional coefficient is adjusted from 0.6 to 1 to speed up the response; when the deviation < 2%, the first proportional coefficient is reduced to 0.3 to avoid oscillation, and the feedforward compensation is combined with the electrode consumption rate to ensure that the electrode position adjustment is accurate and can cope with the electrode consumption.

[0157] In step S4044, the electrode height is adjusted according to the actual height adjustment amount until the target height adjustment amount is reached.

[0158] Specifically, in the embodiment of the present application, the actual height adjustment amount The signal is sent to the execution control system, which controls the raising or lowering of the electrode until the target height adjustment is reached. Then, the electrode position and pressure adjustment are performed in the next cycle. Through cyclical adjustments, the arc can be kept stable.

[0159] Step S4045: Obtain the distance between the laser rangefinder and the electrode. The distance includes a first distance interval and a second distance interval in the first direction, a third distance interval and a fourth distance interval in the second direction.

[0160] Specifically, in this embodiment of the invention, when adjusting the electrode height and pressing / releasing position, it is also necessary to adjust the horizontal position of the electrode. For example... Figure 5 As shown, when the electrode is in an ideal horizontal position, points A, B, C, and D represent the installation positions of the laser rangefinder. Line AB is perpendicular to line CD and intersects at the center of the circle. The laser rangefinder's measurement direction is directly opposite the intersection of lines AB and CD. AB corresponds to the first direction, and CD corresponds to the second direction. Therefore, the laser rangefinder's measurement results include a first distance interval x1 and a second distance interval x2 in the first direction, and a third distance interval y1 and a fourth distance interval y2 in the second direction. If x1 = x2 and y1 = y2, it proves that the electrode has not shifted, meaning the electrode is in an ideal horizontal position.

[0161] Step S4046: Determine whether the first distance interval is equal to the second distance interval, or whether the third distance interval is equal to the fourth distance interval.

[0162] Specifically, in this embodiment of the invention, when x1≠x2 or y1≠y2, it indicates that the electrode has shifted and the horizontal position of the electrode needs to be adjusted.

[0163] Step S4047: If the first distance interval is not equal to the second distance interval, then the horizontal position of the electrode is adjusted according to the first distance interval and the second distance interval.

[0164] Specifically, in embodiments of the present invention, such as Figure 6 As shown, when x1≠x2 or y1≠y2, the adjustment in the AB direction is performed first, and the values ​​of x1 and x2 are read at this time. If x1≠x2, the displacement in the AB direction is calculated as x=0.5(x2-x1), where the AB direction is the positive direction.

[0165] Step S4048: If the first distance interval is equal to the second distance interval and the third distance interval is not equal to the fourth distance interval, then the vertical position of the electrode is adjusted according to the third distance interval and the fourth distance interval.

[0166] Specifically, in the embodiment of the present application, the values of x1 and x2 are read again after the adjustment in the AB direction is completed, and when x1=x2, adjustment in the CD direction is performed, with a displacement y=0.5(y2-y1), wherein the CD direction is the positive direction. Figure 7 As shown in the figure, after two adjustments, the accuracy in the horizontal direction of the electrode can be ensured, and the position accuracy of the electrode is improved. Figure 8 As shown in the figure, after two adjustments, the accuracy in the horizontal direction of the electrode can be ensured, and the position accuracy of the electrode is improved.

[0167] In some optional embodiments, the execution control system is connected with the intelligent decision system, receives control instructions, and drives the holder to perform the electrode lifting + horizontal two-dimensional accurate adjustment and electrode pressure release cooperative action, and the position accuracy is not less than 1 mm. The execution control system includes electrode lifting adjustment, electrode horizontal position adjustment, and electrode pressure release adjustment, wherein the electrode horizontal position adjustment is realized by twice vertical direction offset calibration to correct the horizontal position.

[0168] The intelligent control method of the holder of the ore smelting furnace provided by the present application can realize accurate control, intelligent decision, and efficient operation of the holder through multi-dimensional comprehensive analysis of the intelligent control system, thereby effectively improving the overall operation performance of the ore smelting furnace and meeting the needs of modern industrial production for efficient, energy-saving, and stable production.

[0169] In the embodiment, an intelligent control device of the holder of the ore smelting furnace is also provided, which is used to realize the above-mentioned embodiments and preferred embodiments, and will not be described again. As used below, the term "module" can be a combination of software and / or hardware that realizes a predetermined function. Although the device described in the following embodiments is preferably realized in software, realization in hardware or a combination of software and hardware is also possible and is conceived.

[0170] The present embodiment provides an intelligent control device of the holder of the ore smelting furnace, as shown in the figure, which includes: Figure 9

[0171] The parameter acquisition module 901 is used to acquire the running parameters of the holder of the ore smelting furnace.

[0172] The stability evaluation module 902 is used to perform three-dimensional quantitative evaluation of the arc stability of the holder of the ore smelting furnace according to the running parameters, and determine the current arc stability of the holder of the ore smelting furnace.

[0173] ​The adjustment amount determination module 903 is configured to determine a target position adjustment amount and a target pressure release amount of the electrode held by the holder of the electric arc furnace according to the current arc stability.

[0174] The intelligent control module 904 is configured to adjust the electrode position of the electrode according to the target position adjustment amount, and adjust the electrode pressure release of the electrode according to the target pressure release amount.

[0175] In some optional embodiments, the stability evaluation module 902 comprises:

[0176] The parameter calculation unit is configured to determine the current fluctuation coefficient, the arc duration proportion, and the voltage-current phase matching degree of the holder of the electric arc furnace according to the electrode current and the electrode voltage.

[0177] The stability determination unit is configured to determine the current arc stability of the holder of the electric arc furnace according to the current fluctuation coefficient, the arc duration proportion, and the voltage-current phase matching degree.

[0178] In some optional embodiments, the parameter calculation unit comprises:

[0179] The first calculation sub-unit is configured to calculate the current standard deviation and the current mean value according to the electrode current, and calculate the current fluctuation coefficient according to the current standard deviation and the current mean value.

[0180] The second calculation sub-unit is configured to determine the normal arc discharge time according to the electrode current and the electrode voltage, and calculate the arc duration proportion according to the normal arc discharge time and the continuous arc discharge time.

[0181] The third calculation unit is configured to calculate the voltage standard deviation and the voltage mean value according to the electrode voltage, and calculate the voltage-current phase matching degree according to the current standard deviation, the current mean value, the voltage standard deviation, and the voltage mean value.

[0182] In some optional embodiments, the stability determination unit comprises:

[0183] The score calculation sub-unit is configured to determine a current fluctuation coefficient score according to the current fluctuation coefficient, determine an arc duration proportion score according to the arc duration proportion, and determine a voltage-current phase matching degree score according to the voltage-current phase matching degree.

[0184] The score synthesis sub-unit is configured to perform weighted summation on the current fluctuation coefficient score, the arc duration proportion score, and the voltage-current phase matching degree score to obtain the current arc stability.

[0185] In some optional embodiments, the device further comprises:

[0186] The stability prediction module is configured to predict the expected arc stability of the holder of the electric arc furnace after adjusting the electrode position and the electrode pressure release according to the target height adjustment amount and the target pressure release amount, and determine whether the expected arc stability is less than the current arc stability.

[0187] The adjustment amount adjustment module is configured to decrease the target height adjustment amount and the target pressure release amount if the expected arc stability is less than the current arc stability, and return to the step of predicting the expected arc stability of the holder of the electric arc furnace after adjusting according to the target height adjustment amount and the target pressure release amount.

[0188] The adjustment amount setting module is configured to generate an artificial intervention request if the expected arc stability is determined to be less than the current arc stability for a preset number of times in succession, and determine the adjusted target height adjustment amount and the target pressure release amount otherwise.

[0189] In some optional embodiments, the intelligent control module 904 comprises:

[0190] The height position adjustment unit is configured to determine a current deviation amount according to the electrode current and a preset current, and determine a height adjustment basic amount according to the current deviation amount; determine an electrode consumption rate according to the target pressure release amount and an electrode pressure release period, and determine a height feedforward compensation amount according to the electrode consumption rate; determine an actual height adjustment amount according to the height adjustment basic amount and the height feedforward compensation amount based on a PID closed-loop adjustment algorithm; and adjust the electrode height according to the actual height adjustment amount until the target height adjustment amount is reached.

[0191] The horizontal position adjustment unit is configured to obtain a separation distance between the laser range finder and the electrode, the separation distance comprising a first distance separation and a second distance separation in a first direction, and a third distance separation and a fourth distance separation in a second direction; determine whether the first distance separation is equal to the second distance separation, or the third distance separation is equal to the fourth distance separation; if the first distance separation is not equal to the second distance separation, adjust the position of the electrode in the horizontal direction according to the first distance separation and the second distance separation; and if the first distance separation is equal to the second distance separation, and the third distance separation is not equal to the fourth distance separation, adjust the position of the electrode in the vertical direction according to the third distance separation and the fourth distance separation.

[0192] The intelligent control device for the holder of the electric arc furnace provided in the embodiments of the present application can perform the intelligent control method for the holder of the electric arc furnace provided in any of the embodiments of the present application, and has the corresponding functional modules and beneficial effects of the execution method. The further function description of each module and unit is the same as that of the corresponding embodiments described above, and will not be described here again.

[0193] Figure 10 FIG. 1 is a structural schematic diagram of an intelligent decision system in an intelligent control system for a holder of an electric arc furnace provided in an embodiment of the present application.

[0194] The following will be specifically described with reference to Figure 10 which shows a structural schematic diagram suitable for being used to implement the electronic device in the embodiments of the present application. The electronic device can include a processor (such as a central processor, a graphic processor, etc.) 1001, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1002 or a program loaded from a storage 1008 into a random access memory (RAM) 1003. In the RAM 1003, various programs and data required for the operation of the electronic device are also stored. The processor 1001, the ROM 1002, and the RAM 1003 are connected to each other through a bus 1004. An input / output (I / O) interface 1005 is also connected to the bus 1004.

[0195] Generally, the following devices can be connected to the I / O interface 1005: an input device 1006 including, for example, a touch screen, a touch pad, a keyboard, a mouse, a camera, a microphone, an accelerometer, a gyroscope, etc.; an output device 1007 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; a storage 1008 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the electronic device to communicate with other devices wirelessly or by wire to exchange data. Although Figure 10 The electronic device with various devices is shown, but it should be understood that all the shown devices are not required to be implemented or possessed, and more or less devices can be alternatively implemented or possessed.

[0196] In particular, according to the embodiments of the present application, the processes described above with reference to the flowcharts can be implemented as a computer software program. For example, the embodiments of the present application include a computer program product including a computer program carried on a non-transitory computer readable medium, the computer program containing program codes for executing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network through the communication device 1009, or installed from the storage 1008, or installed from the ROM 1002. When the computer program is executed by the processor 1001, the above-mentioned functions defined in the intelligent control method of the ore smelting furnace holder according to the embodiments of the present application are performed.

[0197] Figure 10 The electronic device shown is only an example and should not bring any limitation to the functions and use range of the embodiments of the present application.

[0198] Although the embodiments of the present application are described in conjunction with the accompanying drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.

Claims

1. A method for intelligent control of a holder of an electric arc furnace, characterized in that, The method comprises: obtaining operating parameters of the submerged arc furnace holder, the operating parameters comprising: electrode current and electrode voltage; conducting three-dimensional quantitative evaluation of arc stability of the submerged arc furnace holder according to the operating parameters to determine current arc stability of the submerged arc furnace holder; the three-dimensional quantitative evaluation of arc stability of the submerged arc furnace holder according to the operating parameters to determine current arc stability of the submerged arc furnace holder comprises: determining current fluctuation coefficient, arc duration ratio and voltage-current phase matching degree of the submerged arc furnace holder according to the electrode current and the electrode voltage; determining current arc stability of the submerged arc furnace holder according to the current fluctuation coefficient, the arc duration ratio and the voltage-current phase matching degree; the determination of the current fluctuation coefficient, the arc duration ratio and the voltage-current phase matching degree of the submerged arc furnace holder according to the electrode current and the electrode voltage comprises: calculating current standard deviation and current mean value according to the electrode current, and calculating current fluctuation coefficient according to the current standard deviation and the current mean value, the calculation formula being as follows: ； determining arc normal discharge time according to the electrode current and the electrode voltage, and calculating the arc duration ratio according to the arc normal discharge time and arc continuous discharge time, the calculation formula being as follows: ； calculating voltage standard deviation and voltage mean value according to the electrode voltage, and calculating the voltage-current phase matching degree according to the current standard deviation, the current mean value, the voltage standard deviation and the voltage mean value, the calculation formula being as follows: ； wherein, is the current fluctuation coefficient, is the arc duration proportion, is the voltage-current phase matching degree, is the electrode current, is the electrode voltage, is the current standard deviation, is the current mean value, is the voltage standard deviation, is the voltage mean value, is the voltage-current covariance, is the arc normal discharge time, is the arc sustained discharge time; the determination of current arc stability of the submerged arc furnace holder according to the current fluctuation coefficient, the arc duration ratio and the voltage-current phase matching degree comprises: determining current fluctuation coefficient score according to the current fluctuation coefficient, determining arc duration ratio score according to the arc duration ratio, and determining voltage-current phase matching degree score according to the voltage-current phase matching degree, the score calculation formula being as follows: 、 、 ； wherein, score the current fluctuation coefficient, score the arc duration proportion, score the voltage-current phase matching degree; performing weighted summation on the current fluctuation coefficient score, the arc duration ratio score and the voltage-current phase matching degree score to obtain the current arc stability; determining target position adjustment amount and target pressure release amount of the electrode held by the submerged arc furnace holder according to the current arc stability; the target position adjustment amount comprises: target height adjustment amount, and the determination of the target position adjustment amount and the target pressure release amount of the submerged arc furnace holder according to the current arc stability comprises: determining correction amplitude according to the current arc stability, and calculating the product of the correction amplitude and height basic adjustment amount to obtain height correction adjustment amount; determining weight coefficient according to current working condition, and determining height preliminary adjustment amount according to the height correction adjustment amount, the height basic adjustment amount and the weight coefficient; determining the target height adjustment amount according to the height preliminary adjustment amount, last target height adjustment amount and preset filtering coefficient; determining the target pressure release amount according to the target height adjustment amount, theoretical optimal electrode length and last electrode length. adjusting the electrode position of the electrode according to the target position adjustment amount, and adjusting the electrode pressure of the electrode according to the target pressure adjustment amount.

2. The method of claim 1, wherein, Before adjusting the electrode position of the electrode according to the target position adjustment amount, and adjusting the electrode pressure of the electrode according to the target pressure adjustment amount, the method further comprises: predicting the expected arc stability of the arc holder after adjusting the electrode position and the electrode pressure according to the target height adjustment amount and the target pressure adjustment amount, and determining whether the expected arc stability is less than the current arc stability; if yes, reducing the target height adjustment amount and the target pressure adjustment amount, and returning to the step of predicting the expected arc stability of the arc holder after adjusting the electrode position and the electrode pressure according to the target height adjustment amount and the target pressure adjustment amount; if the expected arc stability is determined to be less than the current arc stability for a preset number of times, generating a request for manual intervention, otherwise determining the adjusted target height adjustment amount and the target pressure adjustment amount.

3. The method of claim 1, wherein, The step of adjusting the electrode position of the electrode according to the target position adjustment amount further comprises: obtaining the interval distance between the laser range finder and the electrode, the interval distance comprising a first distance interval and a second distance interval in a first direction, and a third distance interval and a fourth distance interval in a second direction; determining whether the first distance interval is equal to the second distance interval, or the third distance interval is equal to the fourth distance interval; if the first distance interval is not equal to the second distance interval, adjusting the horizontal position of the electrode according to the first distance interval and the second distance interval; if the first distance interval is equal to the second distance interval, and the third distance interval is not equal to the fourth distance interval, adjusting the vertical position of the electrode according to the third distance interval and the fourth distance interval.

4. An intelligent control system for a holder of a submerged arc furnace, characterized in that, comprises: a data acquisition system, an intelligent decision system, an execution control system and a man-machine interaction system; the data acquisition system is configured to acquire the operating parameters of the arc holder and send them to the intelligent decision system; the intelligent decision system is connected to the data acquisition system and is configured to execute the intelligent control method of the arc holder according to any one of claims 1 to 3; the execution control system is connected to the intelligent decision system and is configured to adjust the electrode position and the electrode pressure of the electrode based on the control instructions of the intelligent decision system; the man-machine interaction system is connected to the data acquisition system, the intelligent decision system and the execution control system, and is configured to acquire remote control data and perform fault diagnosis according to a preset fault level.

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