CN114058776B - Converter gun position correction method - Google Patents
Converter gun position correction method Download PDFInfo
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- CN114058776B CN114058776B CN202111314342.7A CN202111314342A CN114058776B CN 114058776 B CN114058776 B CN 114058776B CN 202111314342 A CN202111314342 A CN 202111314342A CN 114058776 B CN114058776 B CN 114058776B
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- lance
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4606—Lances or injectors
- C21C5/462—Means for handling, e.g. adjusting, changing, coupling
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4673—Measuring and sampling devices
Abstract
The invention provides a converter lance position correction method, which relates to the technical field of converter smelting and comprises a furnace body, oxygen lances and an operation panel, wherein the output ends of the oxygen lances extend into the furnace body, the bottom inside the furnace body is a furnace bottom, molten steel is filled in the furnace body, the thickness of the furnace bottom is the height of the furnace bottom, the distance between the liquid level of the molten steel and the furnace bottom is the depth of the liquid level of the molten steel, and the distance between the output ends of the oxygen lances and the liquid level of the molten steel is the height of the lance position; according to the invention, the liquid level depth of molten steel can be calculated by matching with the molten steel charging amount of each furnace according to the size of the hearth in the middle and the last three periods before and after the service of the furnace and the height of the bottom of each furnace, then the height of the bottom of each furnace and the depth of the liquid level of the molten steel in the smelting process of each furnace are comprehensively judged by utilizing a gun position control program, the height of a gun position is converted by correcting the height of a scale, and an operator in the converting process only needs to adjust the operation of an oxygen lance according to the height of the gun position displayed by a gun position height display module, thereby being beneficial to the stable control of the converting process.
Description
Technical Field
The invention relates to the technical field of converter smelting, in particular to a converter gun position correction method.
Background
The lance position in the converter blowing process refers to the distance from the outlet end of an oxygen lance nozzle to the molten steel liquid level of a molten pool, and two factors are mainly considered for determining the proper lance position: firstly, a certain impact area is required; secondly, under the condition of ensuring that the furnace bottom is not damaged, the furnace has certain impact depth, the smelting condition is deteriorated due to overhigh or overlow lance position in the blowing process to cause production accidents, and the lance position control is influenced due to different molten pool liquid level heights of each furnace under the change of the loading amount and the furnace bottom height in practice;
the method for judging the position of an oxygen lance nozzle in a converter in the blowing process is judged and adjusted through the height of an oxygen lance scale at present, but the height of the liquid level of a molten pool in the converter can be changed due to the fluctuation of the loading capacity of the converter, the fluctuation of the height of a furnace bottom and the change of the size of a hearth in the later period before and after the converter service, so that the deterioration of smelting conditions can be caused by singly referring to the height of the oxygen lance scale to control the position of the oxygen lance, and production accidents can be caused.
Disclosure of Invention
Aiming at the problems, the invention provides a converter gun position correction method, which corrects the molten pool liquid level height of each furnace by calculating the size of a hearth, the height of a furnace bottom and the loading amount, and reduces calculation errors through system conversion, thereby achieving more accurate gun position control, and being beneficial to controlling the smelting process and reducing production accidents such as splashing.
In order to realize the purpose of the invention, the invention is realized by the following technical scheme: a converter lance position correction model comprises a furnace body, an oxygen lance and an operation panel, wherein the output end of the oxygen lance extends into the furnace body, the bottom inside the furnace body is a furnace bottom, molten steel is filled in the furnace body, the thickness of the furnace bottom is the height of the furnace bottom, the distance between the liquid level of the molten steel and the furnace bottom is the depth of the liquid level of the molten steel, and the distance between the output end of the oxygen lance and the liquid level of the molten steel is the height of the lance position;
the operation panel comprises a gun position height display module, a furnace bottom height input module and a loading amount input module, wherein the gun position height display module is used for displaying the data of the gun position height, the furnace bottom height input module is used for inputting the data of the furnace bottom height, and the loading amount input module is used for inputting the quantity data of the molten steel.
The further improvement lies in that: a control block is arranged in the operation panel, a lance position control program is packaged in the control block, the lance position control program is used for controlling the error of the oxygen lance action target to be less than 1 cm, and input and output signals of the control block comprise: hset, deadW, fixD, fixUp, QWH, GC, DOWN, UP, SET, and ERR.
The further improvement lies in that: hset represents the target height of the lance position to be controlled, and the target height of the oxygen lance to be operated is calculated according to the set height or a defined algorithm; deadW represents an ignored error, the oxygen lance moves to a target height and fluctuates with a measured value, and the DeadW value is set to avoid the situation of frequent movement caused by fluctuation of the measured value.
The further improvement is that: the FixD represents the gun position descending correction, after the gun position descends to the target position, the stopping process has inertia to cause the oxygen lance to stop at a position lower than the target height, and the gun lifting of the oxygen lance is stopped by utilizing the gun position descending correction to enable the oxygen lance to accurately stop at the target height; the FixUp represents gun position rising correction, after the gun position rises to a target position, the stopping process has inertia to cause the oxygen lance to stop at a position higher than the target height, and the gun lifting of the oxygen lance is stopped by utilizing the gun position rising correction so as to enable the oxygen lance to accurately stop at the target height; the QWH represents the actual height of the oxygen lance, and the lifting action of the oxygen lance and the stopping of the oxygen lance from the action to the target position are determined through the comparison of the actual height and the target height.
The further improvement lies in that: the GC represents a control input condition which is used for distinguishing production stages and controlling input according to the production stages; the DOWN represents an oxygen lance descending control signal; the UP represents an oxygen lance rising control signal; the SET represents an oxygen lance in-position signal, the oxygen lance is triggered after rising to a target position, and when other equipment needs to move after the oxygen lance moves in place, the signal is used as a preposed linkage condition; the ERR represents a fault signal, and when the height of the oxygen lance is abnormal after the oxygen lance moves in place, the ERR outputs the fault signal.
A converter gun position correction method comprises the following steps:
the method comprises the following steps: according to the sizes of the hearths in the three periods before, during and after the campaign and the height of the furnace bottom measured in each shift, the height of the furnace bottom is recorded into a furnace bottom height recording module in an operation panel, and the molten steel loading amount is recorded into a loading amount recording module in the operation panel after the iron adding and the scrap steel adding of each furnace are finished;
step two: calculating the liquid level depth of molten steel by using the loading amount of molten steel in each furnace, comprehensively judging the height of the furnace bottom and the liquid level depth of the molten steel in the smelting process of each furnace by using a lance position control program, and then converting the height of a lance position by correcting the height of a scale;
step three: and displaying the converted lance height on a lance height display module, and in the blowing process, adjusting the height of the oxygen lance of each furnace by an operator according to the lance height displayed by the lance height display module.
The further improvement lies in that: in the second step, the gun position control program comprehensively judges the concrete process as follows: adding 120t of molten steel into a melting pool of a new furnace, wherein the liquid level depth of the molten steel is based on 1568mm, and when the fluctuation of the molten steel is +/-1 t, the liquid level depth of the molten steel is adjusted to 1568/120=13.1mm; in a 12000 furnace in the middle of a campaign, the liquid level depth of molten steel is 1315mm, the fluctuation of the molten steel amount is +/-1 t, and the liquid level depth of the molten steel is adjusted to 1315/120=10.9mm; in a 24000 furnace in the later period of a campaign, the liquid level depth of molten steel is 1029mm, the fluctuation of the amount of molten steel is +/-1 t, and the liquid level depth of the molten steel is adjusted to 1029/120=8.5mm.
The further improvement lies in that: and in the second step, the liquid level depth of the molten steel is corrected according to the molten steel loading amount of each furnace, the furnace bottom height is synchronously measured, the fluctuation is adjusted to be +/-10 mm, and the furnace bottom height recording module is recorded once per shift of measurement.
The invention has the beneficial effects that:
1. according to the invention, the liquid level depth of molten steel can be calculated by matching with the molten steel charging amount of each furnace according to the size of the hearth in the three periods before, during and after the service of the furnace and the height of the bottom of each furnace, then the height of the bottom of each furnace and the depth of the liquid level of the molten steel are comprehensively judged by utilizing a gun position control program, the height of the gun position is converted by correcting the height of the scale, an operator in the converting process only needs to adjust the oxygen lance to operate according to the height of the gun position displayed by the gun position height display module, the accuracy height does not need to be manually calculated, the level of centimeter is reached, and the stable control of the converting process is facilitated.
2. According to the invention, after the iron adding and scrap steel adding of each furnace are finished, the charging amount of molten steel is recorded into the charging amount recording module only through the operation panel, and the furnace bottom height measured on duty is recorded into the furnace bottom height recording module, so that the accurate gun position height can be converted and displayed on the gun position height display module, and the system conversion reduces the calculation error, so that the gun position control is more accurate, and the control of the smelting process and the reduction of production accidents such as splashing and the like are facilitated.
Drawings
FIG. 1 is a front view of the present invention;
fig. 2 is a schematic diagram of a gun position control procedure according to the present invention.
Wherein: 1. a furnace body; 2. an oxygen lance; 3. a furnace bottom; 4. molten steel; 5. the height of the furnace bottom; 6. the liquid level depth of the molten steel; 7. the height of the gun position; 8. a gun position height display module; 9. a furnace bottom height input module; 10. and a loading amount recording module.
Detailed Description
In order to further understand the present invention, the following detailed description will be made with reference to the following examples, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.
Example one
According to the drawings shown in fig. 1 and 2, the embodiment provides a converter lance position correction model, which comprises a furnace body 1, an oxygen lance 2 and an operation panel, wherein the output end of the oxygen lance 2 extends into the furnace body 1, the bottom inside the furnace body 1 is a furnace bottom 3, molten steel 4 is filled in the furnace body 1, the thickness of the furnace bottom 3 is a furnace bottom height 5, the distance between the liquid level of the molten steel 4 and the furnace bottom 3 is a molten steel liquid level depth 6, and the distance between the output end of the oxygen lance 2 and the liquid level of the molten steel 4 is a lance position height 7;
the operation panel comprises a gun position height display module 8, a furnace bottom height input module 9 and a loading amount input module 10, wherein the gun position height display module 8 is used for displaying data of the gun position height 7, the furnace bottom height input module 9 is used for inputting data of the furnace bottom height 5, and the loading amount input module 10 is used for inputting quantity data of the molten steel 4. When the device is used, the furnace bottom height 5 is measured in an operation panel according to the size of a furnace hearth in three periods before, during and after the service of the furnace and each shift, the furnace bottom height 5 is recorded into a furnace bottom height recording module 9, and the loading amount of molten steel 4 is recorded into a loading amount recording module 10 in the operation panel after the iron adding and scrap steel adding of each furnace are finished; calculating the liquid level depth 6 of molten steel by using the loading amount of molten steel 4 in each furnace, then comprehensively judging the furnace bottom height 5 and the liquid level depth 6 of molten steel in the smelting process of each furnace by using a gun position control program, and converting the height of a gun position into the height 7 of the gun position by correcting the height of a scale; and displaying the converted lance height 7 on a lance height display module 8, and in the blowing process, adjusting the height of each furnace oxygen lance 2 by an operator according to the lance height 7 displayed by the lance height display module 8.
A control block is arranged in the operation panel, a lance position control program is packaged in the control block, the lance position control program is used for controlling the error of the action target of the oxygen lance 2 to be less than 1 cm, and input and output signals of the control block comprise: hset, deadW, fixD, fixUp, QWH, GC, DOWN, UP, SET, and ERR. Hset represents the target height of the lance position to be controlled, and the target height of the oxygen lance 2 to be operated is calculated according to the set height or a defined algorithm; deadW represents an ignored error, the oxygen lance 2 moves to a target height and fluctuates with a measured value, and the DeadW value is set to avoid the situation of frequent movement caused by the fluctuation of the measured value. The FixD represents the gun position descending correction, after the gun position descends to the target position, the stopping process has inertia to cause the oxygen lance 2 to stop at a position lower than the target height, and the gun lifting of the oxygen lance 2 is stopped by utilizing the gun position descending correction to enable the oxygen lance 2 to accurately stop at the target height; the FixUp represents gun position rising correction, after the gun position rises to a target position, the stopping process has inertia to cause the oxygen lance 2 to stop at a position higher than the target height, and the gun position rising correction is utilized to make the oxygen lance 2 stop lifting to enable the oxygen lance 2 to accurately stop at the target height; the QWH represents the actual height of the oxygen lance 2, and the lifting action of the oxygen lance 2 and the stopping of the oxygen lance 2 when the oxygen lance 2 moves to the target position are determined through the comparison of the actual height and the target height. The GC represents a control input condition which is used for distinguishing production stages and controlling input according to the production stages; the DOWN represents a control signal for the descent of the oxygen lance 2; the UP represents a control signal for rising the oxygen lance 2; the SET represents an oxygen lance 2 in-position signal, the oxygen lance 2 is triggered after rising to a target position, and when other equipment needs to move after the oxygen lance 2 moves in position, the signal is used as a preposed linkage condition; ERR represents a fault signal, and when the height of the oxygen lance 2 is abnormal after the oxygen lance moves in place, the ERR outputs the fault signal.
Example two
The embodiment provides a converter gun position correction method, which comprises the following steps:
the method comprises the following steps: according to the sizes of the hearths in the three periods before, during and after the campaign and the furnace bottom height 5 measured in each shift, the furnace bottom height 5 is recorded into a furnace bottom height recording module 9 in an operation panel, and the loading amount of the molten steel 4 is recorded into a loading amount recording module 10 in the operation panel after the iron adding and the scrap steel adding of each furnace are finished;
step two: the method comprises the following steps of calculating the liquid level depth 6 of molten steel by using the loading amount of molten steel 4 in each furnace, comprehensively judging the furnace bottom height 5 and the liquid level depth 6 of the molten steel in the smelting process of each furnace by using a lance position control program, and converting the lance position height 7 by correcting the height of a scale, wherein the method comprises the following specific steps: adding 120t of molten steel into a melting pool of a new furnace, wherein the liquid level depth 6 of the molten steel is based on 1568mm, and when the quantity of the molten steel 4 fluctuates by +/-1 t, the liquid level depth 6 of the molten steel is adjusted to 1568/120=13.1mm; in a 12000 furnace in the middle of a campaign, the liquid level depth of molten steel is 1315mm, the fluctuation of 4 amount of molten steel is +/-1 t, and the liquid level depth of the molten steel is adjusted to 1315/120=10.9mm; in a 24000 furnace at the later stage of a campaign, the liquid level depth of molten steel is 1029mm, the fluctuation of the amount of the molten steel is +/-1 t, and the liquid level depth of the molten steel is 6 adjusted to 1029/120=8.5mm; correcting the liquid level depth 6 of the molten steel according to the loading amount of 4 molten steel in each furnace, synchronously measuring the height 5 of the furnace bottom, adjusting the fluctuation by 10mm to +/-10 mm, and recording the height of the furnace bottom into a furnace bottom recording module 9 once per shift measurement;
step three: and displaying the converted lance position height 7 on a lance position height display module 8, and in the blowing process, adjusting the height of each furnace oxygen lance 2 according to the lance position height 7 displayed by the lance position height display module 8 by an operator.
According to the invention, the liquid level depth 6 of molten steel can be calculated by matching with the charging amount of molten steel 4 in each furnace according to the size of a hearth in the three periods before, during and after the service of the furnace and the height 5 of the measured furnace bottom in each shift, then the height 5 of the furnace bottom and the depth 6 of the liquid level of the molten steel in the smelting process of each furnace are comprehensively judged by utilizing a gun position control program, the height 7 of the gun position is converted by correcting the height of a scale, and an operator in the blowing process only needs to adjust the operation of an oxygen lance 2 according to the height 7 of the gun position displayed by a gun position height display module 8, so that the accuracy is not required to be manually calculated, the centimeter level is reached, and the stable control of the blowing process is facilitated. Meanwhile, after the iron adding and scrap steel adding of each furnace are finished, the correct gun position height 7 can be converted and displayed on the gun position height display module 8 only by inputting the loading amount of molten steel 4 into the loading amount input module 10 and inputting the measured furnace bottom height 5 into the furnace bottom height input module 9 on duty on the operation panel, so that the method is more convenient, and the calculation error is reduced by system conversion, so that the gun position control is more accurate, and the method is favorable for controlling the smelting process and reducing the production accidents such as splashing and the like.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (1)
1. A converter gun position correction method is characterized by comprising the following steps:
the method comprises the following steps: according to the sizes of the hearths in the three periods before, during and after the campaign and the height of the furnace bottom measured in each shift, the height of the furnace bottom is recorded into a furnace bottom height recording module in an operation panel, and the molten steel loading amount is recorded into a loading amount recording module in the operation panel after the iron adding and the scrap steel adding of each furnace are finished;
step two: the method comprises the following steps of calculating the liquid level depth of molten steel by using the loading amount of molten steel in each furnace, comprehensively judging the furnace bottom height and the liquid level depth of the molten steel in the smelting process of each furnace by using a gun position control program, and converting the height of a gun position by correcting the height of a scale, wherein the gun position control program comprehensively judges the specific process: adding 120t of molten steel into a melting pool of a new furnace, wherein the liquid level depth of the molten steel is based on 1568mm, and when the fluctuation of the molten steel is +/-1 t, the liquid level depth of the molten steel is adjusted to 1568/120=13.1mm; in a 12000 furnace in the middle of a campaign, the liquid level depth of molten steel is 1315mm, the fluctuation of the molten steel amount is +/-1 t, and the liquid level depth of the molten steel is adjusted to 1315/120=10.9mm; in the 24000 furnace in the later period of the furnace service, the liquid level depth of molten steel is 1029mm, the fluctuation of the amount of the molten steel is +/-1 t, the liquid level depth of the molten steel is adjusted to be 1029/120=8.5mm, the liquid level depth of the molten steel is corrected according to the molten steel loading amount of each furnace, the height of the furnace bottom is synchronously measured, the fluctuation of 10mm is adjusted to be +/-10 mm, and the height of the furnace bottom is recorded into a furnace bottom recording module once per measurement;
step three: and displaying the converted lance height on a lance height display module, and in the blowing process, adjusting the height of the oxygen lance of each furnace by an operator according to the lance height displayed by the lance height display module.
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| CN115369209A (en) * | 2022-07-08 | 2022-11-22 | 阳春新钢铁有限责任公司 | Operation method for accurately controlling lance position in converter smelting process |
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