Magnesium wire adding amount control method for spheroidizing by wire feeding method

Abstract

The invention discloses a magnesium wire adding amount control method for spheroidizing through a wire feeding method. The magnesium wire adding amount control method comprises the following steps that basic parameter data are collected to construct a basic magnesium wire adding amount model; obtaining a magnesium wire basic quantity based on a basic magnesium wire addition quantity model for the to-be-spheroidized ladle, constructing a residual magnesium increase and decrease wire length logic, a spheroidizing speed logic and a temperature increase and decrease wire length quantity logic, and correcting the magnesium wire basic quantity; according to the method, various characteristics of the molten iron are comprehensively considered, the magnesium wire adding amount is accurately calculated, the spheroidizing effect of each batch of molten iron is more stable, and the consistency of product quality is improved; resource waste caused by unreasonable addition amount of the magnesium wires is avoided, so that the production cost is reduced; the manual calculation and judgment time is shortened, the production rhythm is accelerated, and the overall production efficiency is improved; according to different production conditions, such as conventional and special molten iron information grouping, corresponding calculation logic and configuration tables are formulated respectively, diversified production requirements can be met, and high flexibility and adaptability are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of casting process, in particular to a method for calculating the adding amount of magnesium wire in a feeding line method spheroidizing process. BACKGROUND

[0002] In the casting production process, spheroidizing is a crucial link, which aims to spheroidize the graphite in molten iron to improve the mechanical properties of cast iron. Magnesium wire is widely used as a spheroidizing agent in this process. However, accurate control of the adding amount of magnesium wire has always been a problem in the industry. Traditional methods rely on manual experience to determine the adding amount of magnesium wire, which is greatly influenced by human factors and is difficult to ensure the stability of the spheroidizing quality of each batch of molten iron. At the same time, due to insufficient consideration of the comprehensive influence of molten iron weight, original sulfur content, molten iron temperature, and residual magnesium results, etc., the adding amount of magnesium wire is often unreasonable, which not only causes resource waste and increases production cost, but also may affect product quality due to poor spheroidizing effect and reduce production efficiency.

[0003] In view of the above defects, the present inventors have finally obtained the present application after long-term research and practice. SUMMARY

[0004] To solve the above technical defects, the technical scheme adopted by the present application provides a method for controlling the adding amount of magnesium wire in a feeding line method spheroidizing process, comprising the following steps:

[0005] S1, collecting basic parameter data to construct a basic magnesium wire adding amount model;

[0006] S2, obtaining a basic amount of magnesium wire for a spheroidizing batch based on the basic magnesium wire adding amount model, constructing residual magnesium increase and decrease line length logic, spheroidizing speed logic, and temperature increase and decrease line length logic, and correcting the basic amount of magnesium wire.

[0007] Preferably, in the step S1, the spheroidizing batch in the spheroidizing process is selected based on historical production reports, the basic parameter data in each spheroidizing batch is collected, the basic parameter data includes molten iron weight, original sulfur content of molten iron, residual magnesium content, magnesium wire basic parameters, and magnesium wire adding amount, the basic parameter data is classified through molten iron original sulfur interval, residual magnesium interval, molten iron weight interval, and magnesium wire basic interval, and the basic magnesium wire adding amount model of the corresponding relationship between the basic parameter data is constructed.

[0008] Preferably, in the step S1, the magnesium wire absorption rate of the nearest spheroidizing batch is calculated, thereby constructing a dynamic absorption rate fluctuation curve.

[0009] Preferably, the historical data days are set, and the historical data range is divided based on the historical data days from the day of the spheroidizing batch to be processed; and the magnesium wire addition model is updated in real time based on the spheroidizing batch in the historical data range.

[0010] Preferably, the relevant data of the spheroidizing batch to be processed are divided into a regular group and a special group; when the number of spheroidizing batches in the historical data range that are in the same molten iron original sulfur interval, residual magnesium interval, molten iron weight interval, and magnesium wire basic interval as the spheroidizing batch to be processed is greater than or equal to a set value, the spheroidizing batch to be processed is divided into the regular group; and when the number of spheroidizing batches in the historical data range that are in the same molten iron original sulfur interval, residual magnesium interval, molten iron weight interval, and magnesium wire basic interval as the spheroidizing batch to be processed is less than the set value, the spheroidizing batch to be processed is divided into the special group.

[0011] Preferably, for the spheroidizing batch to be processed in the regular group, the magnesium wire basic amount is the average value of the magnesium wire addition amounts of the spheroidizing batches in the same molten iron original sulfur interval, residual magnesium interval, molten iron weight interval, and magnesium wire basic interval in the historical data range.

[0012] Preferably, for the spheroidizing batch to be processed in the special group, the magnesium wire basic amount is the magnesium wire addition amount of the spheroidizing batch that is in the same molten iron original sulfur interval, residual magnesium interval, molten iron weight interval, and magnesium wire basic interval as the spheroidizing batch to be processed and closest to the spheroidizing batch to be processed.

[0013] Preferably, when there is no spheroidizing batch in the historical production report that is in the same molten iron original sulfur interval, residual magnesium interval, molten iron weight interval, and magnesium wire basic interval as the spheroidizing batch to be processed, the spheroidizing batch that is in the same interval as the spheroidizing batch to be processed and closest to the spheroidizing batch to be processed is selected as a reference batch, and the magnesium wire addition amount of the reference batch is manually corrected to obtain the magnesium wire addition amount of the spheroidizing batch to be processed.

[0014] Preferably, in the step S2, the residual magnesium increase / decrease line length logic is:

[0015] In the nodularizing heat of the same original sulfur interval of the molten iron, the residual magnesium interval, the molten iron weight interval and the magnesium wire basic interval, the closest nodularizing heat to the heat to be nodularized is selected as the adjusting heat, when the residual magnesium content of the adjusting heat is in the target residual magnesium interval, the magnesium wire basic amount does not need to be corrected; when the residual magnesium content of the adjusting heat is greater than the target residual magnesium interval, the magnesium wire basic amount is reduced; when the residual magnesium content of the adjusting heat is less than the target residual magnesium interval, the magnesium wire basic amount is increased.

[0016] The temperature increasing and decreasing line length logic is:

[0017] The molten iron temperature is divided into molten iron temperature intervals, and the magnesium wire basic amount is increased or decreased based on the molten iron temperature of the heat to be nodularized being in different molten iron temperature intervals.

[0018] Preferably, in the step S2, the nodularizing speed logic is that the molten iron weight is divided into molten iron weight intervals, and the feeding speed of the magnesium wire is increased or decreased based on the molten iron weight of the heat to be nodularized being in different molten iron weight intervals.

[0019] Compared with the prior art, the beneficial effects of the present application are that: the present application accurately calculates the magnesium wire addition amount by comprehensively considering various characteristics of the molten iron, so that the nodularizing effect of each batch of molten iron is more stable, and the consistency of product quality is improved; resource waste caused by unreasonable magnesium wire addition amount is avoided, and the consumption of nodularizing agent is reduced, thereby reducing production cost; automatic calculation of the magnesium wire addition amount reduces the time for manual calculation and judgment, improves the automation degree of the production process, speeds up the production rhythm, and improves the overall production efficiency; different production situations, such as conventional and special molten iron information groups, are formulated with corresponding calculation logic and configuration table, which can adapt to diversified production demands, has strong flexibility and adaptability. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The figure is a flowchart of the magnesium wire addition amount control method for the feeding line method nodularizing treatment. DETAILED DESCRIPTION

[0021] The above and other technical features and advantages of the present application will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings.

[0022] As shown in the figure, Figure 1 as shown in the figure, Figure 1 The figure is a flowchart of the magnesium wire addition amount control method for the feeding line method nodularizing treatment.

[0023] The magnesium wire addition amount control method for the feeding line method nodularizing treatment of the present application comprises the following steps:

[0024] S1, collect basic parameter data to construct a basic magnesium wire addition model;

[0025] S2, obtain a magnesium wire basic amount based on the basic magnesium wire addition model for a to-be-spheroidizing treatment batch, construct a residual magnesium increase / decrease line length logic, a spheroidizing speed logic, and a temperature increase / decrease line length amount logic, and correct the magnesium wire basic amount.

[0026] Specifically, in the step S1, a spheroidizing batch in spheroidizing treatment is selected based on a historical production report, basic parameter data in each spheroidizing batch is collected, the basic parameter data includes hot metal weight, hot metal original sulfur content, residual magnesium content, magnesium wire basic parameter, and magnesium wire addition amount, the basic parameter data is classified through hot metal original sulfur interval, residual magnesium interval, hot metal weight interval, and magnesium wire basic interval, the basic magnesium wire addition model of a corresponding relationship between the basic parameter data is constructed, production parameters of a to-be-spheroidizing treatment batch are obtained, and a magnesium wire basic amount to be added is determined based on the basic magnesium wire addition model.

[0027] The production parameters include hot metal weight, hot metal original sulfur content, target residual magnesium interval, magnesium wire basic parameter, and hot metal temperature.

[0028] The magnesium wire basic interval is grouped according to the source of the magnesium wire, and the influence of the difference in magnesium wire characteristics of different suppliers on spheroidizing effect is considered.

[0029] The hot metal weight interval is grouped according to the size of the hot metal weight, and different weight intervals of hot metal have different magnesium wire addition requirements in spheroidizing treatment.

[0030] The hot metal original sulfur interval is grouped according to the high / low of the original sulfur content, and the original sulfur content is an important factor affecting spheroidizing process, and different contents require different magnesium wire addition strategies.

[0031] The residual magnesium interval is grouped according to the high / low of the target residual magnesium interval.

[0032] In the step S1, the magnesium wire absorption rate of the nearest spheroidizing batch is calculated, thereby constructing a dynamic absorption rate fluctuation curve to directly observe the spheroidizing treatment situation.

[0033] A historical data day number is set, a historical data range is divided based on the historical data day number from the to-be-spheroidizing treatment batch day as a starting point, the basic magnesium wire addition model is based on the spheroidizing batches in the historical data range to update the data in real time, thereby ensuring that the basic magnesium wire addition model used has timeliness and improves prediction accuracy.

[0034] In the step S2, the relevant data of the package to be spheroidized is divided into a regular group and a special group based on the historical data. Specifically, when the number of spheroidizing packages in the same range of the original sulfur content of molten iron, the residual magnesium range, the molten iron weight range, and the magnesium wire base range is greater than or equal to a set value, the package to be spheroidized is divided into the regular group. When the number of spheroidizing packages in the same range of the original sulfur content of molten iron, the residual magnesium range, the molten iron weight range, and the magnesium wire base range is less than the set value, the package to be spheroidized is divided into the special group.

[0035] The magnesium wire base amount of the package to be spheroidized in the regular group is the average magnesium wire addition amount of the spheroidizing packages in the same range of the original sulfur content of molten iron, the residual magnesium range, the molten iron weight range, and the magnesium wire base range in the historical data range.

[0036] The magnesium wire base amount of the package to be spheroidized in the special group is the magnesium wire addition amount of the spheroidizing package closest to the package to be spheroidized in the same range of the original sulfur content of molten iron, the residual magnesium range, the molten iron weight range, and the magnesium wire base range.

[0037] When there is no spheroidizing package in the same range of the original sulfur content of molten iron, the residual magnesium range, the molten iron weight range, and the magnesium wire base range as the package to be spheroidized in the historical production report, the spheroidizing package closest to the package to be spheroidized in the same range of the original sulfur content of molten iron, the residual magnesium range, the molten iron weight range, and the magnesium wire base range is selected as the reference package, and the magnesium wire addition amount of the reference package is manually corrected to obtain the magnesium wire addition amount of the package to be spheroidized.

[0038] Specifically, when the package to be spheroidized in the special group is produced by multiple packages with the same production parameters, the magnesium wire addition amount of the subsequent packages can be intelligently corrected based on the deviation of the residual magnesium content after production and the target residual magnesium range after the first manual correction.

[0039] The residual magnesium increase / decrease line length logic is as follows:

[0040] Among the spheroidizing packages in the same range of the original sulfur content of molten iron, the residual magnesium range, the molten iron weight range, and the magnesium wire base range as the package to be spheroidized, the spheroidizing package closest to the package to be spheroidized is selected as the adjustment package. When the residual magnesium content of the adjustment package is within the target residual magnesium range, the magnesium wire base amount does not need to be corrected. When the residual magnesium content of the adjustment package is greater than the target residual magnesium range, the magnesium wire base amount is reduced. When the residual magnesium content of the adjustment package is less than the target residual magnesium range, the magnesium wire base amount is increased.

[0041] The spheroidization speed logic is: dividing the molten iron weight into intervals, and increasing or decreasing the magnesium wire feeding speed based on the molten iron weight in the batch to be spheroidized being in different intervals.

[0042] The temperature increase or decrease line length logic is:

[0043] The molten iron temperature is divided into intervals, and the magnesium wire base amount is increased or decreased based on the molten iron temperature in the batch to be spheroidized being in different intervals.

[0044] Based on the corrected magnesium wire base amount and the selected magnesium wire feeding speed, the production control of the spheroidization process is performed.

[0045] The present application accurately calculates the magnesium wire addition amount by comprehensively considering various characteristics of molten iron, so that the spheroidization effect of each batch of molten iron is more stable, and the consistency of product quality is improved. The unreasonable magnesium wire addition amount is avoided, the consumption of spheroidizing agent is reduced, and the production cost is reduced. Automatic calculation of magnesium wire addition amount reduces the time of manual calculation and judgment, improves the automation degree of production process, speeds up the production rhythm, and improves the overall production efficiency. Different production situations, such as normal and special molten iron information grouping, have corresponding calculation logic and configuration table, which can adapt to diversified production needs, has strong flexibility and adaptability.

[0046] The above is only the preferred embodiment of the present application, which is only illustrative but not limiting. Those skilled in the art understand that many changes, modifications and even equivalents can be made within the spirit and scope of the present application as defined in the claims, but all will fall within the protection scope of the present application.

Claims

1. A method of controlling the addition amount of a wire-feeding method spheroidized magnesium wire, characterized by, The method comprises the following steps: S1, collecting basic parameter data to construct a basic magnesium wire addition model; S2, obtaining a magnesium wire basic amount based on the basic magnesium wire addition model for a balling treatment batch, constructing a residual magnesium increase / decrease line length logic, a balling speed logic, and a temperature increase / decrease line length amount logic, and correcting the magnesium wire basic amount.

2. The method of claim 1, wherein the amount of the feedstock magnesium wire is controlled by the following equation: ###0001### wherein, A is the amount of the feedstock magnesium wire, D is the diameter of the feedstock magnesium wire, and V is the wire feed speed. In the step S1, a balling batch in balling treatment is selected based on a historical production report, and the basic parameter data in each balling batch is collected, the basic parameter data including molten iron weight, original sulfur content of molten iron, residual magnesium content, magnesium wire basic parameter, and magnesium wire addition amount, the basic parameter data is classified through molten iron original sulfur interval, residual magnesium interval, molten iron weight interval, and magnesium wire basic interval, and the basic magnesium wire addition model of the corresponding relationship between the basic parameter data is constructed.

3. The method of claim 1, wherein the amount of the feedstock magnesium wire is controlled by the following equation: ###0000014### wherein, A is the amount of the feedstock magnesium wire, D is the diameter of the feedstock magnesium wire, and V is the wire feed speed. In the step S1, the magnesium wire absorption rate of the nearest balling batch is calculated, thereby constructing a dynamic absorption rate fluctuation curve.

4. The method of claim 2, wherein the amount of the feed method spheronized magnesium wire is controlled by the amount of the magnesium wire. A historical data day number is set, a historical data range is divided based on the historical data day number from the day of the balling treatment batch as a starting point, and the basic magnesium wire addition model is updated in real time based on the balling batch in the historical data range.

5. The method of claim 4, wherein the amount of the feed method spheronized magnesium wire is controlled by the amount of the magnesium wire. Based on the related data of the balling treatment batch, the data is divided into a regular group and a special group; when the number of balling batches in the historical data range that are in the same molten iron original sulfur interval, residual magnesium interval, molten iron weight interval, and magnesium wire basic interval as the balling treatment batch is greater than or equal to a set value, the data is divided into the regular group; when the number of balling batches in the historical data range that are in the same molten iron original sulfur interval, residual magnesium interval, molten iron weight interval, and magnesium wire basic interval as the balling treatment batch is less than the set value, the data is divided into the special group.

6. The method of claim 5, wherein the amount of the feed method spheronized magnesium wire is controlled by the amount of the magnesium wire. The magnesium wire basic amount of the balling treatment batch in the regular group is the average value of the magnesium wire addition amount of the balling batches in the same molten iron original sulfur interval, residual magnesium interval, molten iron weight interval, and magnesium wire basic interval in the historical data range.

7. The method for controlling the amount of magnesium wire added in the wire feeding spheroidizing treatment according to claim 6, wherein: The magnesium wire basic amount of the balling treatment batch in the special group is the magnesium wire addition amount of the balling batch that is in the same molten iron original sulfur interval, residual magnesium interval, molten iron weight interval, and magnesium wire basic interval and is closest to the balling treatment batch.

8. The method of claim 7, wherein the amount of the balling-treated magnesium wire is controlled by the amount of the balling agent. When there is no balling batch in the historical production report that is in the same molten iron original sulfur interval, residual magnesium interval, molten iron weight interval, and magnesium wire basic interval as the balling treatment batch, the balling batch that is in the same interval and is closest to the balling treatment batch is selected as a reference batch, and the magnesium wire addition amount of the reference batch is manually corrected to obtain the magnesium wire addition amount of the balling treatment batch.

9. The method of claim 1, wherein the amount of the feedstock magnesium wire is controlled by the following equation: ###0001### wherein, A is the amount of the feedstock magnesium wire, D is the diameter of the feedstock magnesium wire, and V is the wire feed speed. In the step S2, the residual magnesium increase / decrease line length logic is: In the nodularizing heat sequence with the same original sulfur interval of the molten iron, the residual magnesium interval, the molten iron weight interval and the magnesium wire base interval, the closest nodularizing heat sequence to the heat to be nodularized is selected as the adjusting heat sequence, when the residual magnesium content of the adjusting heat sequence is within the target residual magnesium interval, the magnesium wire base amount does not need to be corrected; when the residual magnesium content of the adjusting heat sequence is greater than the target residual magnesium interval, the magnesium wire base amount is reduced; when the residual magnesium content of the adjusting heat sequence is less than the target residual magnesium interval, the magnesium wire base amount is increased; The temperature increase and decrease line length amount logic is: The molten iron temperature is divided into temperature intervals, and the magnesium wire base amount is increased or decreased based on the molten iron temperature of the heat to be nodularized being in different temperature intervals.

10. The method of claim 1, wherein the amount of the feedstock magnesium wire is controlled by the following equation: ###00002### wherein, A is the amount of the feedstock magnesium wire, D is the diameter of the feedstock magnesium wire, and V is the wire feed speed. In the step S2, the nodularizing speed logic is that the molten iron weight is divided into weight intervals, and the feeding speed of the magnesium wire is increased or decreased based on the molten iron weight of the heat to be nodularized being in different weight intervals.

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