CN110586915A - Construction method for preventing blockage of online steel ladle air brick - Google Patents
Construction method for preventing blockage of online steel ladle air brick Download PDFInfo
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- CN110586915A CN110586915A CN201911037869.2A CN201911037869A CN110586915A CN 110586915 A CN110586915 A CN 110586915A CN 201911037869 A CN201911037869 A CN 201911037869A CN 110586915 A CN110586915 A CN 110586915A
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- gas
- ladle
- brick
- air
- pressure
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a construction method, particularly discloses a construction method for preventing an online steel ladle air brick from being blocked, and belongs to the technical field of design and manufacture of accessories of metallurgical production equipment. The construction method for preventing the online steel ladle air brick from being blocked has good anti-blocking effect and convenient operation. The construction method prevents the gas permeable brick from being blocked because the molten steel enters the gas permeable brick by keeping the gas pressure in the ladle gas permeable brick larger than the pressure of the molten steel after the refining protective gas is cut off.
Description
Technical Field
The invention relates to a construction method, in particular to a construction method for preventing an online steel ladle air brick from being blocked, and belongs to the technical field of design and manufacture of accessories of metallurgical production equipment.
Background
At present, a slit type air brick is used for a 160t steel ladle of a certain steel vanadium company, and the phenomenon of bottom blowing blockage caused by the fact that molten steel permeates into the air brick slit easily occurs in the using process. The main reasons are as follows: the air brick expands in volume at high temperature, the air slit is enlarged, and when the air source is closed after argon blowing is finished, molten steel permeates into the air brick slit due to the influence of factors such as hydrostatic pressure of the molten steel and the like, so that the air brick is blocked.
Patent document CN103600057A entitled a method for preventing blocking of air brick of steel ladle discloses a method for preventing blocking of air brick of steel ladle, comprising the following steps: a compressed air pipeline is connected to the position of the ladle roaster; a metal hose is connected to the compressed air pipeline; after the steel ladle is placed into a roaster, a metal hose is connected into a bottom argon blowing pipe male head of the steel ladle body; and opening a compressed air valve, providing compressed air into the bottom blowing argon pipe of the steel ladle body, and starting baking. By adopting the method, the liquid impurities can be prevented from flowing to the air brick, and meanwhile, the air brick can be kept in an air permeable state all the time, so that the normal use of the off-line baked steel ladle is ensured. The patent document only relates to a method for preventing the air brick of the off-line ladle from being blocked in the baking process, and does not relate to the problem of solving the problem of preventing the air brick of the on-line ladle from being blocked.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the construction method for preventing the online steel ladle air brick from being blocked has good anti-blocking effect and convenient operation.
The technical scheme adopted for solving the technical problems is as follows: a construction method for preventing the gas permeable brick of the on-line ladle from being blocked is disclosed, which can prevent the gas permeable brick from being blocked by molten steel entering the gas permeable brick by keeping the gas pressure in the gas permeable brick of the ladle to be higher than the pressure of the molten steel after the refined protective gas is cut off.
The ladle further comprises a ventilation conveying pipe communicated with the ladle ventilation brick, protective gas is input into the ladle ventilation brick from an external gas source through the ventilation conveying pipe, a one-way valve is arranged at the input end of the ventilation conveying pipe, and the gas in the ladle ventilation brick and the ventilation conveying pipe is prevented from leaking through the one-way valve after the refined protective gas is cut off so as to keep the gas pressure in the ladle ventilation brick to be greater than the pressure of molten steel.
The preferable mode of the scheme is that a pressure stabilizing device is also arranged on the air delivery pipe outside the steel ladle, the pressure stabilizing device is communicated with the air brick of the steel ladle through the air delivery pipe, and after the refining protective gas is cut off, gas is continuously input into the air brick through the pressure stabilizing device communicated with the air delivery pipe to keep the gas pressure in the air brick of the steel ladle to be greater than the pressure of the molten steel.
Further, the pressure stabilizer at least comprises a small gas storage tank, refined protective gas is stored in the small gas storage tank, and after the refined protective gas input into the steel ladle gas permeable brick through an external gas source is cut off, the refined protective gas stored in the small gas storage tank continuously inputs the refined protective gas into the steel ladle gas permeable brick through a gas transmission pipe to continuously input the gas so as to keep the gas pressure in the steel ladle gas permeable brick to be greater than the pressure of the molten steel.
The preferable mode of the scheme is that the ventilating conveying pipe is a steel conveying pipe.
Further, a plurality of gas transmission pipelines with the aperture not more than 2 mm are arranged on the steel ladle air brick.
The invention has the beneficial effects that: according to the construction method, the gas pressure in the steel ladle air brick is still kept to be higher than the pressure of the molten steel after the refining protective gas is cut off, so that the molten steel is prevented from entering the air brick to cause the blockage of the air brick. Therefore, after the pressure of the refining protective gas is relieved, the gas with the pressure value larger than that of the molten steel is still reserved in the air brick of the steel ladle, so that the problem of air brick blockage caused by reverse flow of refined molten steel into the slit of the air brick due to low air pressure in the air brick can be effectively solved, the anti-blockage effect is good, the effect is realized by still keeping the gas pressure in the air brick of the steel ladle larger than that of the molten steel, namely, the high-pressure gas existing in the slit of the air brick is kept continuously, and the operation is very convenient.
Drawings
Fig. 1 is a schematic structural diagram of a ladle gas permeable brick involved in the construction method for preventing the blockage of the online ladle gas permeable brick.
Labeled as: the steel ladle comprises a steel ladle 1, steel ladle air bricks 2, an air delivery pipe 3, a one-way valve 4 and a pressure stabilizing device 5.
Detailed Description
As shown in figure 1, the construction method for preventing the blockage of the online ladle air brick provided by the invention has good anti-blockage effect and is convenient to operate. The construction method prevents the gas permeable brick from being blocked because the molten steel enters the gas permeable brick by keeping the gas pressure in the ladle gas permeable brick larger than the pressure of the molten steel after the refining protective gas is cut off. According to the construction method, the gas pressure in the steel ladle air brick is still kept to be higher than the pressure of the molten steel after the refining protective gas is cut off, so that the molten steel is prevented from entering the air brick to cause the blockage of the air brick. Therefore, after the pressure of the refining protective gas is relieved, the gas with the pressure value larger than that of the molten steel is still reserved in the air brick of the steel ladle, so that the problem of air brick blockage caused by reverse flow of refined molten steel into the slit of the air brick due to low air pressure in the air brick can be effectively solved, the anti-blockage effect is good, the effect is realized by still keeping the gas pressure in the air brick of the steel ladle larger than that of the molten steel, namely, the high-pressure gas existing in the slit of the air brick is kept continuously, and the operation is very convenient.
In the above embodiment, in order to improve the convenience of operation as much as possible, the ladle 1 of the present application is further provided with the ventilating delivery pipe 3 communicated with the ladle ventilating brick 2, and the external gas source inputs the protective gas to the ladle ventilating brick 2 through the ventilating delivery pipe 3, and the present application adds the check valve 4 to the input end of the ventilating delivery pipe 3, and prevents the gas in the ladle ventilating brick 2 and the ventilating delivery pipe 3 from leaking through the check valve 4 after the refined protective gas is cut off, so as to keep the gas pressure in the ladle ventilating brick 2 to be greater than the pressure of the molten steel.
Further, in order to improve the continuity of the anti-blocking air pressure and ensure that the air pressure in the air brick before the molten steel is output is always greater than the pressure of the molten steel, a pressure stabilizing device 5 is additionally arranged on the air conveying pipe 3 outside the steel ladle 1, the pressure stabilizing device 5 is communicated with the steel ladle air brick 2 through the air conveying pipe 3, and after the refined protective gas is cut off, the air is continuously input into the air brick through the pressure stabilizing device 5 communicated with the air conveying pipe 3 to keep the air pressure in the steel ladle air brick 2 greater than the pressure of the molten steel. At this time, the pressure stabilizer 5 preferably has a structure including at least one small gas tank in which the refining protective gas is stored, and after the refining protective gas supplied into the ladle gas brick 2 by an external gas source is cut off, the refining protective gas stored in the small gas tank continuously supplies the refining protective gas to the ladle gas brick 2 through the gas transmission pipe 3 and continuously supplies the gas to maintain the gas pressure in the ladle gas brick 2 to be greater than the pressure of the molten steel. In order to ensure that the air pipe can be kept smooth even under the action of the gravity of the small air storage tank, the air transmission pipe 3 is a steel air pipe. A plurality of gas transmission pipelines with the aperture not more than 2 mm are correspondingly arranged on the steel ladle air brick 2.
In conclusion, the online anti-blocking construction method for the steel ladle air brick has the following advantages,
the method overcomes the problems in the background art, is simple and feasible in structure, and ensures that the molten steel at the bottom of the online steel ladle cannot penetrate into the slit of the air brick by installing the check valve and the air storage tank on the air vent pipeline of the steel ladle body, thereby achieving the technical effect of preventing the air brick from being blocked and having better economic benefit and social benefit.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The method of the invention can be implemented by the following steps:
according to the application, the method for preventing the blockage of the air brick of the ladle is provided, wherein the steps comprise: firstly, a quick connector of a ventilation pipeline of the ladle body is connected with an external air source, and a one-way valve is installed behind a male connector of the ventilation pipeline of the ladle body. Secondly, a small air storage tank is arranged on a pipeline connected with the air brick at the bottom of the ladle behind the one-way valve. When an external air source is disconnected, the one-way valve prevents gas from flowing back, a ventilation pipeline of the steel ladle body cannot form negative pressure due to reverse flow of the gas, and meanwhile, the gas in the small gas storage tank can still continuously supply gas to the steel ladle ventilation brick, so that the aim of slow pressure relief is fulfilled, and molten steel at the bottom of the steel ladle cannot penetrate into a ventilation brick slit under the action of the static pressure of the molten steel to cause blockage of the ventilation brick.
Example 1
In 2019, 3, 15 days, and G51# steel ladles are respectively provided with a one-way valve and a gas storage tank on 2 gas permeable branches according to the method and the steps of the invention, the blockage phenomenon of gas permeable bricks does not occur in the online use process of the steel ladles, and the steel ladles are offline for replacement after 27 furnaces are used because the residual thickness of the gas permeable bricks reaches the replacement standard.
Example 2
In 2019, 4 and 1, G26# steel ladles are respectively provided with a one-way valve and a gas storage tank on 2 gas permeable branches according to the method and the steps of the invention, the blockage phenomenon of gas permeable bricks does not occur in the online use process of the steel ladles, and the steel ladles are offline for replacement after 25 furnaces are used because the residual thickness of the gas permeable bricks reaches the replacement standard.
Example 3
In 2019, 30 days in 4 months, and G57# steel ladles are respectively provided with a one-way valve and a gas storage tank on 2 gas permeable branches according to the method and the steps of the invention, the blockage phenomenon of gas permeable bricks does not occur in the online use process of the steel ladles, and the steel ladles are offline for replacement after 23 furnaces are used because the residual thickness of the gas permeable bricks reaches the replacement standard.
Comparative example 1
24 days in 3 months in 2019, the G30 ladle is not provided with a one-way valve and a gas storage tank on 2 gas permeable branches according to the original method, and the gas permeable bricks are replaced when a No. 2 gas permeable brick ladle is used for 14 furnaces on line and a No. 1 gas permeable brick ladle is used for 16 furnaces on line.
Comparative example 2
In 2019, 4, 13 months, G17# steel ladles are not provided with a one-way valve and a gas storage tank respectively according to the original method, namely, 13 furnaces and 19 furnaces are used for the 1# air brick steel ladles and the 2# air brick steel ladles on line, and the air bricks are replaced due to the blocking phenomenon of the air bricks.
Comparative example 3
In 2019, 5, 16 months, G39# steel ladles are not provided with a one-way valve and a gas storage tank respectively according to the original method, namely, 13 furnaces and 17 furnaces are used for 1# air brick steel ladles and 2# air brick steel ladles on line, and air bricks are replaced due to the blocking phenomenon of the air bricks.
Compared with the prior method, the method of the invention has the advantages that the blockage phenomenon of the air brick does not occur in the use process of the on-line steel ladle, the service life of the air brick is prolonged, and the cost of refractory materials is reduced; meanwhile, the replacement amount of the air brick is reduced, the labor intensity of workers is reduced, and good economic and social benefits are achieved.
Although the present invention has been described above in connection with exemplary embodiments, it will be apparent to those skilled in the art that various modifications and changes may be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (6)
1. A construction method for preventing the blockage of an online ladle air brick is characterized in that: the construction method prevents the gas permeable brick from being blocked because the molten steel enters the gas permeable brick by keeping the gas pressure in the ladle gas permeable brick larger than the pressure of the molten steel after the refining protective gas is cut off.
2. The construction method for preventing the blockage of the air brick of the online ladle according to claim 1, characterized in that: the ladle (1) also comprises a ventilating conveying pipe (3) communicated with the ladle ventilating brick (2), an external gas source inputs protective gas to the ladle ventilating brick (2) through the ventilating conveying pipe (3), a one-way valve (4) is arranged at the input end of the ventilating conveying pipe (3), and after the refining protective gas is cut off, the gas in the ladle ventilating brick (2) and the ventilating conveying pipe (3) is prevented from leaking through the one-way valve (4) to keep the gas pressure in the ladle ventilating brick (2) to be greater than the pressure of molten steel.
3. The construction method for preventing the blockage of the online ladle gas permeable brick as claimed in claim 2, wherein: the pressure stabilizing device (5) is also arranged on the air transmission pipe (3) outside the steel ladle (1), the pressure stabilizing device (5) is communicated with the air brick (2) of the steel ladle through the air transmission pipe (3), and after the refining protective gas is cut off, the gas is continuously input into the air brick through the pressure stabilizing device (5) communicated with the air transmission pipe (3) to keep the gas pressure in the air brick (2) of the steel ladle to be greater than the pressure of the molten steel.
4. The construction method for preventing the blockage of the air brick of the online ladle according to claim 3, characterized in that: the pressure stabilizing device (5) at least comprises a small gas storage tank, refining protective gas is stored in the small gas storage tank, after the refining protective gas input into the steel ladle air brick (2) through an external gas source is cut off, the refining protective gas stored in the small gas storage tank continuously inputs the refining protective gas into the steel ladle air brick (2) through the air transmission pipe (3) and continuously inputs the gas, so that the gas pressure in the steel ladle air brick (2) is kept to be greater than the pressure of molten steel.
5. The construction method for preventing the blockage of the online ladle gas permeable brick as claimed in any one of claims 2 to 4, wherein the construction method comprises the following steps: the ventilating conveying pipe (3) is a steel gas conveying pipe.
6. The construction method for preventing the blockage of the air brick of the online ladle according to claim 5, wherein the construction method comprises the following steps: a plurality of gas transmission pipelines with the aperture not more than 2 mm are arranged on the steel ladle air brick (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911037869.2A CN110586915A (en) | 2019-10-29 | 2019-10-29 | Construction method for preventing blockage of online steel ladle air brick |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911037869.2A CN110586915A (en) | 2019-10-29 | 2019-10-29 | Construction method for preventing blockage of online steel ladle air brick |
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| Publication Number | Publication Date |
|---|---|
| CN110586915A true CN110586915A (en) | 2019-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911037869.2A Pending CN110586915A (en) | 2019-10-29 | 2019-10-29 | Construction method for preventing blockage of online steel ladle air brick |
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| CN (1) | CN110586915A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113333725A (en) * | 2021-06-02 | 2021-09-03 | 武汉科技大学 | Magnetic composite Tesla valve type slit air brick |
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| CN201678699U (en) * | 2010-03-30 | 2010-12-22 | 重庆钢铁(集团)有限责任公司 | Ladle anti-seepage argon blowing system |
| CN202539561U (en) * | 2012-03-15 | 2012-11-21 | 石家庄钢铁有限责任公司 | Ventilation device capable of preventing negative pressure steel leakage |
| CN103100705A (en) * | 2013-03-06 | 2013-05-15 | 济南鲁东耐火材料有限公司 | Anti-clogging air supply system of permeable brick for ladle |
| CN202963440U (en) * | 2012-11-16 | 2013-06-05 | 河南省耕生耐火材料有限公司 | Device for preventing molten steel from permeating gas permeable brick of steel ladle |
| CN104561448A (en) * | 2015-01-06 | 2015-04-29 | 江苏永钢集团有限公司 | Anti-seepage smelting steel ladle |
| CN205258523U (en) * | 2015-11-24 | 2016-05-25 | 攀钢集团西昌钢钒有限公司 | Ladle bottom blowing argon prevention of seepage steel system |
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2019
- 2019-10-29 CN CN201911037869.2A patent/CN110586915A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201678699U (en) * | 2010-03-30 | 2010-12-22 | 重庆钢铁(集团)有限责任公司 | Ladle anti-seepage argon blowing system |
| CN202539561U (en) * | 2012-03-15 | 2012-11-21 | 石家庄钢铁有限责任公司 | Ventilation device capable of preventing negative pressure steel leakage |
| CN202963440U (en) * | 2012-11-16 | 2013-06-05 | 河南省耕生耐火材料有限公司 | Device for preventing molten steel from permeating gas permeable brick of steel ladle |
| CN103100705A (en) * | 2013-03-06 | 2013-05-15 | 济南鲁东耐火材料有限公司 | Anti-clogging air supply system of permeable brick for ladle |
| CN104561448A (en) * | 2015-01-06 | 2015-04-29 | 江苏永钢集团有限公司 | Anti-seepage smelting steel ladle |
| CN205258523U (en) * | 2015-11-24 | 2016-05-25 | 攀钢集团西昌钢钒有限公司 | Ladle bottom blowing argon prevention of seepage steel system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113333725A (en) * | 2021-06-02 | 2021-09-03 | 武汉科技大学 | Magnetic composite Tesla valve type slit air brick |
| CN113333725B (en) * | 2021-06-02 | 2022-02-25 | 武汉科技大学 | Magnetic composite Tesla valve type slit air brick |
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Application publication date: 20191220 |
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| RJ01 | Rejection of invention patent application after publication |