CN115430817B - Argon blowing control device for slag discharging in final pouring stage and use method - Google Patents
Argon blowing control device for slag discharging in final pouring stage and use method Download PDFInfo
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- CN115430817B CN115430817B CN202211395498.7A CN202211395498A CN115430817B CN 115430817 B CN115430817 B CN 115430817B CN 202211395498 A CN202211395498 A CN 202211395498A CN 115430817 B CN115430817 B CN 115430817B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/18—Controlling or regulating processes or operations for pouring
- B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
- B22D11/185—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level by using optical means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/58—Pouring-nozzles with gas injecting means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
Abstract
The invention discloses an argon blowing control device for slag tapping in the final pouring stage and a using method thereof, belonging to the technical field of continuous casting. The device comprises a ladle model, a tundish model, a long nozzle model and a tundish water outlet model, wherein a first flow regulating valve, a funnel for containing grease and an argon blowing air hole are arranged on the long nozzle model, and a second flow regulating valve and a flowmeter are arranged on the tundish water outlet model; the using method is to simulate the ladle slag by adopting the grease which is similar to the physical and flow characteristics of the liquid slag and the solid slag of the tundish, so that the quantity of the grease passing through the tundish outlet under different working conditions can be obtained, and the optimal argon blowing flow can be obtained by fitting. The method can determine the blowing flow of the argon at the long nozzle based on the steel passing amount at the final pouring stage in the actual production, and the finally determined blowing flow can promote the floating removal of the lower slag, reduce the slag drops from being involved in the molten steel, and improve the cleanliness and the quality of the casting blank.
Description
Technical Field
The invention belongs to the technical field of continuous casting, and relates to an argon blowing control device for slag tapping at the final stage of pouring and a using method thereof.
Background
In the continuous casting process, the tundish is an indispensable metallurgical container; it is connected with steel ladle and crystallizer, and has the important functions of stabilizing component temperature, shunting molten steel, floating inclusion and removing, etc. However, the tundish as a middle link of molten steel casting has unstable processes such as tundish casting, long nozzle replacement, ladle replacement, late casting and the like, and has certain influence on the quality stability of the molten steel.
In the final stage of pouring, because molten steel in a steel ladle or a tundish is insufficient, a rotational flow slag discharging phenomenon is very easy to occur, and after the slag in the steel ladle or the tundish enters a next metallurgical container, the slag in the steel ladle or the tundish may not float upwards and be removed in time, so that the secondary oxidation or slag entrapment phenomenon of the molten steel is caused, the defects of slag inclusion and the like are formed in a casting blank, and the quality stability of a product is seriously influenced.
Chinese patent No. 115090841A discloses a device for researching the movement behavior of a covering agent in a tundish and a using method thereof, wherein the structure of the device obviously does not consider how to effectively control argon blowing of slag in the final stage of pouring, argon is not blown in the whole research of the movement behavior of the covering agent in the tundish, and grease is simulated to be a tundish covering agent.
Chinese patent CN111992680A discloses a device and a control method for tundish blowing argon protection pouring, wherein argon enters a tundish through a connecting pipe 14, and obviously argon blowing control of slag tapping at the final stage of pouring is not considered, and the pouring process and the influence mechanism of argon blowing protection are completely different from those of slag tapping at the final stage of pouring.
Chinese patent CN110394433A discloses a long nozzle argon blowing refining device and method for effectively removing impurities clamped in a tundish, wherein the structure of an argon introducing device consists of a long nozzle, a rotational flow chamber and an outlet of the rotational flow chamber, an annular groove is reserved at the position, close to the top, of the inner wall of the long nozzle, an annular dispersion type air inlet chamber is arranged in the annular groove, the annular dispersion type air inlet chamber is connected with an argon conveying system through an air inlet hole formed in the wall of the long nozzle, and the air inlet direction of the air inlet hole is horizontal and is perpendicular to the axial direction of the long nozzle; the lower part of the long nozzle is tangentially connected with the cyclone chamber. Obviously, the device for introducing argon has a complex structure, impurities are removed by the cooperation of the molten steel flowing through the cyclone chamber and the blown argon bubbles, and the slag falling process and the influence mechanism in the final pouring stage are not considered.
Disclosure of Invention
The invention aims to solve the technical problems that the defects of secondary oxidation or slag entrapment of molten steel, slag inclusion in casting blanks and the like in the argon blowing control process of slag discharging at the final stage of pouring in the prior art are overcome, the product yield is low, and the technical defects of high cost and low efficiency of experimental research on real components of the molten steel and steel slag are required; and the mode of removing impurities in the tundish by the molten steel flowing through the cyclone chamber and the blown-in argon bubbles is complex, and the problem of slag charge pollution in the slag discharging process also exists.
In order to solve the technical problems, the invention provides the following technical scheme:
an argon blowing control device for slag tapping in the final pouring stage comprises a ladle model, a tundish model, a long nozzle model and a tundish nozzle model; the bottom of the ladle model is communicated with the tundish model through the long nozzle model, and the tundish water outlet model is arranged at the bottom of the tundish model;
wherein: the long nozzle model is structurally arranged with the ladle model and the tundish model according to the position relation and the connection relation of the ladle, the long nozzle and the tundish in actual production;
the tundish water outlet model is structurally arranged according to the position relation and the connection relation of a tundish and a water outlet in actual production and the tundish model;
the long nozzle model is provided with a first flow regulating valve, a funnel used for containing grease and an argon blowing air hole, and the tundish nozzle model is provided with a second flow regulating valve and a flowmeter.
Preferably, the ladle model, the tundish model, the long nozzle model and the tundish outlet model in the argon blowing control device are made of organic glass.
Preferably, the steel ladle model and the tundish model in the argon blowing control device are both provided with scale marks for measuring the liquid level depth.
Preferably, the argon blowing gas hole is connected with an argon blowing device, and the argon blowing device comprises an argon storage device, an argon suction device, an argon flow regulating valve and an argon flow meter.
Preferably, the argon blowing control device further comprises the following modules:
the steel grade information acquisition module is used for acquiring the molten steel density, the steel ladle outlet diameter, the steel ladle diameter and the residual steel amount in the steel ladle of a cast target steel grade;
the steel flux obtaining module is used for obtaining the steel flux of the target steel grade at the last casting stage according to the molten steel density, the diameter of the steel ladle outlet, the diameter of the steel ladle and the residual steel amount in the steel ladle;
and the argon flow control module is used for determining the optimal water gap argon blowing flow which is most beneficial to controlling the roughing slag floating removal at the final stage of pouring according to the steel passing amount.
Preferably, the steel grade information acquisition module, the steel flux acquisition module and the argon gas flow control module are realized in the form of software functional modules and can be stored in a computer readable storage medium when being sold or used as independent products.
The use method of the argon blowing control device based on the slag tapping at the last stage of pouring comprises the following steps:
s1, actually measuring the sizes of a steel ladle, a tundish, a long nozzle and a tundish water outlet and the position relation and the connection relation of each device structure, then reducing and preparing a corresponding steel ladle model, a tundish model, a long nozzle model and a tundish water outlet model in an equal proportion according to the sizes, and carrying out device structure setting on the prepared models according to the position relation and the connection relation of each device structure;
s2, adding water into the ladle model with the well-arranged device structure in the step S1, and adjusting the flow of the long nozzle model and the tundish nozzle model to gradually raise the liquid level in the tundish model;
s3, selecting grease with physical and flow characteristics similar to those of the tundish liquid slag and the tundish solid slag according to a similarity principle to simulate ladle slag, selecting proper grease components and content, batching and weighing the grease with the required components and content, and filling the grease into a funnel of the long nozzle model;
s4, introducing argon into the long nozzle model with the well-arranged device structure in the step S2, and simulating the long nozzle argon blowing in the production process;
s5, continuously adding water after the step S4, and after the liquid level in the tundish model rises to the depth height of the designated working liquid level, adjusting the flow of the inlet and the outlet to enable the liquid level in the tundish model to be stable;
s6, opening a funnel for containing the grease in the long nozzle model after the step S5, simulating the slag discharging process in actual production, and recording the quantity of the grease passing through the tundish outlet in real time by adopting a camera.
S7, repeating the steps S1 to S6 under different process parameters including argon blowing flow and steel passing amount to obtain a slag changing rule under different argon blowing conditions;
and S8, analyzing and detecting to obtain the quantity of the grease passing through the tundish outlet, and fitting the argon blowing quantity of the roughing slag under different argon blowing conditions and the quantity of the grease passing through the tundish outlet, thereby obtaining the optimal argon blowing flow rate which is beneficial to roughing slag floating removal in actual production.
Preferably, the inlet/outlet flow rate adjusted in step S5 needs to be changed according to the steel passing amount actually produced.
Preferably, the steel passing amount of the actual production is determined according to the density of the molten steel, the diameter of an outlet of a steel ladle, the diameter of the steel ladle and the residual steel amount in the steel ladle, and the calculation formula is as follows:
wherein Q is the steel passing amount, and the unit is kg/s; rho is the density of the molten steel, and the unit is kg/m < 3 >; d is the diameter of the outlet of the steel ladle and the unit is mm; d is the diameter of the steel ladle and the unit is mm; w is the amount of residual steel in the ladle in kg.
Preferably, all or part of the flow of the using method can also be completed by instructing relevant hardware through a computer program, and the computer program can be stored in a computer readable storage medium, and when being executed by a processor, the computer program can realize the steps of the above-mentioned method embodiments.
Preferably, the computer program in the use method comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, read-Only Memory (ROM), random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like.
It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.
Preferably, the grease in step S3 is dyed silicone oil, dyed kerosene, or dyed soybean oil.
Compared with the prior art, the invention has the following beneficial effects:
in the scheme, the device provided by the invention is simple in structure arrangement, is a model with the structure reduced in equal proportion in the actual production process, and is partially made of organic glass, so that the relationship between the argon blowing flow of slag under the simulated argon blowing condition and the steel passing amount in actual production can be conveniently and directly observed by naked eyes, and the optimal argon blowing flow in the actual production can be obtained.
According to the invention, grease with physical and flow characteristics similar to those of the liquid slag and the solid slag in the tundish is adopted to simulate the ladle slag, the simulation of the slag discharging process in the final pouring stage conforms to the actual condition, the deviation does not exceed 3%, and the actual production verifies that the optimal argon blowing flow numerical value has high precision rate, thereby being beneficial to industrial popularization.
The steel passing amount of the actual production is determined according to the actual molten steel density, the diameter of the steel ladle outlet, the diameter of the steel ladle and the residual steel amount in the steel ladle, so that the simulation result is more in line with the actual situation.
According to the invention, the number of the grease passing through the tundish outlet is obtained by analysis and detection, and the optimal argon blowing flow rate which is beneficial to floating removal of the lower slag in actual production is obtained by fitting the argon blowing amount of the lower slag under different argon blowing conditions and the number of the grease passing through the tundish outlet.
In conclusion, the device disclosed by the invention is simple in structure, can be well matched with the device structure in the actual production process, is low in cost and high in efficiency, can obtain the change rule of slag under different argon blowing conditions at one time, is mainly simulated by the properties of the grease, can obtain the quantity of the grease passing through the outlet of the tundish under different working conditions, and obtains the optimal argon blowing flow by fitting; and finally, the determined argon blowing flow can promote the floating removal of the lower slag, reduce the slag drops from being involved in the molten steel and improve the cleanliness and quality of the casting blank.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings may be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart of an argon blowing control method for slag tapping at the final stage of pouring in the present invention;
FIG. 2 is a functional block diagram of an argon blowing control device for slag tapping at the final stage of pouring in the invention; wherein: m1 is a steel grade information acquisition module; m2 is a steel passing amount acquisition module; m3 is an argon flow control module;
FIG. 3 is a schematic structural diagram of an argon blowing control device for slag tapping at the final stage of pouring in the invention; wherein: 1 is a ladle model; 2 is a tundish model; 3 is a long nozzle model; 4, a tundish water outlet model; 5 is a first flow regulating valve; 6 is a second flow regulating valve; 7 is a funnel; and 8 is a flow meter.
Detailed Description
The following describes technical solutions and technical problems to be solved in the embodiments of the present invention with reference to the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the patent of the invention, not all embodiments.
Example 1
An argon blowing control device for slag discharging in the final pouring stage comprises a ladle model 1, a tundish model 2, a long nozzle model 3 and a tundish water outlet model 4; the bottom of the ladle model 1 is communicated with the tundish model 4 through the long nozzle model 3, and the tundish nozzle model 4 is arranged at the bottom of the tundish model 2;
wherein: the long nozzle model 3 is arranged with the ladle model 1 and the tundish model 2 according to the position relation and the connection relation of a ladle, a long nozzle and a tundish in actual production;
the tundish water outlet model 4 is structurally arranged with the tundish model 2 according to the position relation and the connection relation of a tundish and a water outlet in actual production;
the long nozzle model 3 is provided with a first flow regulating valve 5, a funnel 7 for containing grease and an argon blowing air hole, and the tundish water outlet model is provided with a second flow regulating valve 6 and a flowmeter 8;
the steel ladle model 1, the tundish model 2, the long nozzle model 3 and the tundish water outlet model 4 in the argon blowing control device are made of organic glass;
scale marks for measuring liquid level depth are arranged in the steel ladle model 1 and the tundish model 2 in the argon blowing control device;
the argon blowing device comprises an argon storage device, an argon suction device, an argon flow regulating valve and an argon flow meter;
the argon blowing control device further comprises the following modules:
the steel grade information acquisition module M1 is used for acquiring the molten steel density, the diameter of a steel ladle outlet, the diameter of a steel ladle and the residual steel amount in the steel ladle of a cast target steel grade;
the steel passing amount obtaining module M2 is used for obtaining the steel passing amount of the target steel grade at the last casting stage according to the molten steel density, the diameter of the steel ladle outlet, the diameter of the steel ladle and the residual steel amount in the steel ladle;
and the argon flow control module M3 is used for determining the optimal water gap argon blowing flow which is most favorable for controlling the roughing slag floating removal in the final pouring stage according to the steel passing amount.
The use method of the argon blowing control device for slag tapping at the final stage of pouring, which is described in this embodiment, includes the following steps:
s1: the method comprises the following steps of actually measuring the sizes of a steel ladle, a tundish, a long nozzle and a tundish water outlet and the position relation and the connection relation of each device structure, then reducing the sizes by one third in an equal proportion to prepare a corresponding steel ladle model 1, a tundish model 2, a long nozzle model 3 and a tundish water outlet model 4, and carrying out device structure setting on the prepared models according to the position relation and the connection relation of each device structure;
s2: adding water into the ladle model 1 with the well-arranged device structure in the step S1, adjusting the flow of the long nozzle model 3 to be maximum, and closing the tundish water outlet model 4 to ensure that the liquid level in the tundish model 2 gradually rises;
s3: selecting dyeing silicone oil similar to physical and flow characteristics of liquid slag and solid slag of the ladle according to a similar principle to simulate the slag of the ladle, and filling 90 ml of dyeing silicone oil into a funnel 7 of the long nozzle model 3;
s4: introducing argon into the long nozzle model 3 with the well-arranged device structure in the step S3, and simulating the long nozzle argon blowing in the production process;
s5: after the step S4, continuously adding water, and after the liquid level in the tundish model rises to the depth and height of the designated working liquid level by 300mm, adjusting the flow of an inlet and an outlet to be 25.4L/min so as to stabilize the liquid level in the tundish model; wherein, the flow of the inlet and the outlet adjusted in the step S5 needs to be changed according to the steel passing amount of actual production; the steel passing amount of the actual production is determined according to the density of the molten steel, the diameter of a steel ladle outlet, the diameter of the steel ladle and the residual steel amount in the steel ladle, and the calculation formula is as follows:
wherein: the density of the molten steel is 7000kg/m 3 The diameter of the long nozzle is 81mm, the diameter of the ladle is 2300mm, the residual steel content in the ladle is 2430kg, and the steel passing amount is 46.2 kg/s through calculation;
s6: opening the funnel 7 for containing the grease in the long nozzle model after the step S80, simulating the slag discharging process in actual production, and recording the quantity of the grease passing through the outlet of the tundish by using a camera;
s7: repeating the steps S1 to S6 under different argon blowing flow and steel passing quantity parameters to obtain the change rule of the slag under different argon blowing conditions;
s8: and analyzing the number of the grease passing through the outlet of the tundish, and fitting the argon blowing amount with the amount of the grease flowing out of the tundish to obtain the optimal argon blowing flow of 13.0-18.0L/min which is favorable for floating and removing the lower slag in actual production.
In the scheme, the device provided by the invention is simple in structure arrangement, is a model with the structure reduced in equal proportion in the actual production process, and is partially made of organic glass, so that the relationship between the argon blowing flow of slag under the simulated argon blowing condition and the steel passing amount in actual production can be conveniently and directly observed by naked eyes, and the optimal argon blowing flow in the actual production can be obtained.
According to the invention, grease with physical and flow characteristics similar to those of the liquid slag and the solid slag of the tundish is adopted to simulate the slag of the ladle, the simulation of the slag discharging process in the final pouring stage conforms to the actual condition, the deviation does not exceed 3%, and the actual production verifies that the optimal argon blowing flow numerical value has high precision rate and is beneficial to industrial popularization.
The steel passing amount of the actual production is determined according to the actual molten steel density, the diameter of the steel ladle outlet, the diameter of the steel ladle and the residual steel amount in the steel ladle, so that the simulation result is more in line with the actual situation.
According to the invention, the number of the grease passing through the tundish outlet is obtained by analysis and detection, and the optimal argon blowing flow rate which is beneficial to floating removal of the lower slag in actual production is obtained by fitting the argon blowing amount of the lower slag under different argon blowing conditions and the number of the grease passing through the tundish outlet.
In conclusion, the device disclosed by the invention is simple in structure, can be well matched with the device structure in the actual production process, is low in cost and high in efficiency, can obtain the change rule of slag under different argon blowing conditions at one time, is mainly simulated by the properties of the grease, can obtain the quantity of the grease passing through the outlet of the tundish under different working conditions, and obtains the optimal argon blowing flow by fitting; and finally, the determined argon blowing flow can promote the floating removal of the lower slag, reduce the slag drops from being involved in the molten steel and improve the cleanliness and quality of the casting blank.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. An argon blowing control device for slag tapping in the final pouring stage is characterized by comprising a ladle model, a tundish model, a long nozzle model and a tundish nozzle model; the bottom of the ladle model is communicated with the tundish model through the long nozzle model, and the tundish water outlet model is arranged at the bottom of the tundish model;
wherein: the long nozzle model is structurally arranged with the ladle model and the tundish model according to the position relation and the connection relation of the ladle, the long nozzle and the tundish in actual production;
the tundish water outlet model is structurally arranged according to the position relation and the connection relation of a tundish and a water outlet in actual production and the tundish model;
the long nozzle model is provided with a first flow regulating valve, a funnel for containing grease and an argon blowing air hole, and the tundish nozzle model is provided with a second flow regulating valve and a flowmeter;
the use method of the argon blowing control device for slag tapping at the final pouring stage comprises the following steps:
s1, actually measuring the sizes of a steel ladle, a tundish, a long nozzle and a tundish water outlet and the position relation and the connection relation of each device structure, then reducing and preparing a corresponding steel ladle model, a tundish model, a long nozzle model and a tundish water outlet model in an equal proportion according to the sizes, and carrying out device structure setting on the prepared models according to the position relation and the connection relation of each device structure;
s2, adding water into the ladle model with the well-arranged device structure in the step S1, and adjusting the flow of the long nozzle model and the tundish nozzle model to gradually raise the liquid level in the tundish model;
s3, selecting grease with physical and flow characteristics similar to those of the tundish liquid slag and the tundish solid slag according to a similarity principle to simulate ladle slag, selecting proper grease components and content, batching and weighing the grease with the required components and content, and filling the grease into a funnel of the long nozzle model;
s4, introducing argon into the long nozzle model with the well-arranged device structure in the step S2, and simulating the long nozzle argon blowing in the production process;
s5, continuing to add water after the step S4, and adjusting the flow of an inlet and an outlet to enable the liquid level in the tundish model to be stable after the liquid level in the tundish model rises to the depth height of the specified working liquid level;
s6, opening a funnel for containing the grease in the long nozzle model after the step S5, simulating a slag discharging process in actual production, and recording the quantity of the grease passing through an outlet of the tundish in real time by adopting a camera;
s7, repeating the steps S1 to S6 under different process parameters including argon blowing flow and steel passing amount to obtain the change rule of the slag under different argon blowing conditions;
and S8, analyzing and detecting to obtain the quantity of the grease passing through the tundish outlet, and fitting the argon blowing quantity of the roughing slag under different argon blowing conditions and the quantity of the grease passing through the tundish outlet, thereby obtaining the optimal argon blowing flow rate which is beneficial to roughing slag floating removal in actual production.
2. The argon blowing control device for slag roughing at the end of pouring according to claim 1, characterized in that the ladle model, the tundish model, the long nozzle model and the tundish nozzle model in the argon blowing control device are made of organic glass.
3. The argon blowing control device for slag roughing at the end of pouring according to claim 1, wherein a steel ladle model and a tundish model in the argon blowing control device are both provided with scale marks for measuring liquid level depth.
4. The argon blowing control device for the slag discharging at the end of pouring according to claim 1, wherein the argon blowing gas hole is connected with argon blowing equipment, and the argon blowing equipment comprises an argon storage device, an argon suction device, an argon flow regulating valve and an argon flow meter.
5. The argon blowing control device for slag tapping at the end of pouring according to claim 1, characterized by further comprising the following modules:
the steel grade information acquisition module is used for acquiring the molten steel density, the steel ladle outlet diameter, the steel ladle diameter and the residual steel amount in the steel ladle of a cast target steel grade;
the steel passing amount acquisition module is used for acquiring the steel passing amount at the final casting stage of the target steel grade according to the density of the molten steel, the diameter of an outlet of a steel ladle, the diameter of the steel ladle and the residual steel amount in the steel ladle;
and the argon flow control module is used for determining the optimal water gap argon blowing flow which is most beneficial to controlling the roughing slag floating removal at the final stage of pouring according to the steel passing amount.
6. The use method of the argon blowing control device for the slag tapping at the end of pouring, which is based on any one of the claims 1-5, is characterized by comprising the following steps:
s1, actually measuring the sizes of a steel ladle, a tundish, a long nozzle and a tundish water outlet and the position relation and the connection relation of each device structure, then reducing and preparing a corresponding steel ladle model, a tundish model, a long nozzle model and a tundish water outlet model in an equal proportion according to the sizes, and carrying out device structure setting on the prepared models according to the position relation and the connection relation of each device structure;
s2, adding water into the ladle model with the well-arranged device structure in the step S1, and adjusting the flow of the long nozzle model and the tundish nozzle model to gradually raise the liquid level in the tundish model;
s3, selecting grease with physical and flow characteristics similar to those of the tundish liquid slag and the tundish solid slag according to a similarity principle to simulate ladle slag, selecting proper grease components and content, batching and weighing the grease with the required components and content, and filling the grease into a funnel of the long nozzle model;
s4, introducing argon into the long nozzle model with the well-arranged device structure in the step S2, and simulating the long nozzle argon blowing in the production process;
s5, continuing to add water after the step S4, and adjusting the flow of an inlet and an outlet to enable the liquid level in the tundish model to be stable after the liquid level in the tundish model rises to the depth height of the specified working liquid level;
s6, opening a funnel for containing the grease in the long nozzle model after the step S5, simulating a slag discharging process in actual production, and recording the quantity of the grease passing through an outlet of the tundish in real time by adopting a camera;
s7, repeating the steps S1 to S6 under different process parameters including argon blowing flow and steel passing amount to obtain a slag changing rule under different argon blowing conditions;
and S8, analyzing and detecting to obtain the number of the grease passing through the tundish outlet, and fitting the argon blowing amount of the discharged slag and the number of the grease passing through the tundish outlet under different argon blowing conditions, so as to obtain the optimal argon blowing flow rate which is beneficial to floating and removing the discharged slag in actual production.
7. The use method of the argon blowing control device for the slag tapping at the end of pouring according to the claim 6, characterized in that the inlet and outlet flow rate adjusted in the step S5 is changed according to the steel passing amount actually produced.
8. The use method of the argon blowing control device for the slag tapping at the end of pouring as claimed in claim 7, wherein the actual steel throughput is determined according to the molten steel density, the ladle outlet diameter, the ladle diameter and the residual steel amount in the ladle, and the calculation formula is as follows:
wherein Q is the steel passing amount, and the unit is kg/s;
is the density of the molten steel, and the unit is kg/m3; d is the diameter of the outlet of the steel ladle and the unit is mm; d is the diameter of the steel ladle and the unit is mm; w is the amount of residual steel in the ladle in kg.
9. The use method of the argon blowing control device for slag formation at the end of pouring according to claim 6, wherein the grease in the step S3 is dyed silicone oil, dyed kerosene or dyed soybean oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211395498.7A CN115430817B (en) | 2022-11-09 | 2022-11-09 | Argon blowing control device for slag discharging in final pouring stage and use method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211395498.7A CN115430817B (en) | 2022-11-09 | 2022-11-09 | Argon blowing control device for slag discharging in final pouring stage and use method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115430817A CN115430817A (en) | 2022-12-06 |
| CN115430817B true CN115430817B (en) | 2023-02-28 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201596773U (en) * | 2010-01-13 | 2010-10-06 | 鞍钢股份有限公司 | Automatic control device for blowing argon to steel ladle of continuous casting machine |
| CN105268936A (en) * | 2014-07-16 | 2016-01-27 | 上海梅山钢铁股份有限公司 | Control method for mixed casting of continuous-cast tundish |
| CN112231885A (en) * | 2019-07-15 | 2021-01-15 | 宝山钢铁股份有限公司 | Method for measuring slag amount of continuous casting tundish |
| CN112620601A (en) * | 2020-11-23 | 2021-04-09 | 首钢集团有限公司 | Argon control method and device in casting process |
| CN115090841A (en) * | 2022-08-24 | 2022-09-23 | 北京科技大学 | Device for researching movement behavior of covering agent in tundish and using method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201596773U (en) * | 2010-01-13 | 2010-10-06 | 鞍钢股份有限公司 | Automatic control device for blowing argon to steel ladle of continuous casting machine |
| CN105268936A (en) * | 2014-07-16 | 2016-01-27 | 上海梅山钢铁股份有限公司 | Control method for mixed casting of continuous-cast tundish |
| CN112231885A (en) * | 2019-07-15 | 2021-01-15 | 宝山钢铁股份有限公司 | Method for measuring slag amount of continuous casting tundish |
| CN112620601A (en) * | 2020-11-23 | 2021-04-09 | 首钢集团有限公司 | Argon control method and device in casting process |
| CN115090841A (en) * | 2022-08-24 | 2022-09-23 | 北京科技大学 | Device for researching movement behavior of covering agent in tundish and using method |
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