CN113333725B - Magnetic composite Tesla valve type slit air brick - Google Patents
Magnetic composite Tesla valve type slit air brick Download PDFInfo
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- CN113333725B CN113333725B CN202110612272.7A CN202110612272A CN113333725B CN 113333725 B CN113333725 B CN 113333725B CN 202110612272 A CN202110612272 A CN 202110612272A CN 113333725 B CN113333725 B CN 113333725B
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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
- B22D41/02—Linings
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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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/072—Treatment with gases
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Abstract
The invention relates to a magnetic composite Tesla valve type slit air brick which comprises a brick core made of refractory materials, wherein a plurality of Tesla valve type air slits are vertically arranged inside the brick core, the air direction of the Tesla valve type air slits is the conducting direction from bottom to top, the Tesla valve type air slits are uniformly distributed inside the brick core, a high-temperature resistant electromagnetic coil is arranged in the brick core, the high-temperature resistant electromagnetic coil surrounds the periphery of the outside of the Tesla valve type air slits, the direction of the surrounding central axis of the high-temperature resistant electromagnetic coil is the vertical direction, and the direction of a static magnetic field formed after the high-temperature resistant electromagnetic coil is electrified is the vertical direction and the magnetic field intensity is more than or equal to 1 mT. The invention has the characteristics of excellent corrosion and permeability resistance of the steel slag and the molten steel, long service life, simple and convenient operation and wide applicability.
Description
Technical Field
The invention relates to the technical field of breathable refractory materials, in particular to a magnetic composite Tesla valve type slit air brick.
Background
In recent years, with the development of metallurgical technology and external refining technology, inert gases such as argon are blown into molten steel through the air bricks, so that the effects of stirring the molten steel, adjusting the temperature of the molten steel and removing harmful impurities in the molten steel are achieved, and the smelting efficiency and the cleanliness of the molten steel are improved. In the process, the performance and the service life of the air brick which is taken as a key element directly determine the reliability and the completeness of refining. However, with the large-scale development of smelting vessels, the service conditions of the air brick are increasingly harsh, and the damage mainly comprises the penetration and corrosion of steel slag, damage caused by thermal stress, longitudinal and transverse fracture caused by molten steel scouring and the like, and the problems of slit blockage caused by residual steel and slag. The ladle enters a continuous casting platform after refining is finished, the continuous casting platform lasts for about 1 hour from pouring in place to pouring completion, at the moment, molten steel needs to be kept still and insulated, the air brick stops blowing, the molten steel and steel slag easily seep into a Tesla valve type air slit of the air brick, the air brick is corroded and permeated to a greater extent, and air passage blockage is caused to cause air leakage of the air brick. Because the number of times of using the air brick is generally 6 at present, and the air brick cup and the lining of the smelting container are frequently replaced synchronously, the newly installed air brick is higher than the air brick cup and directly receives strong shearing and scouring action of steel flow, so that the service life of the air brick is urgently needed to be prolonged, and the air brick and the lining refractory material have good synchronism.
In recent years, a great deal of research and practice is carried out on the aspects of the material, the structure, the blowing system, the ventilation parameters and the like of the air brick at home and abroad, and the aim is to improve the service life and the service performance of the air brick. Effect of gagajon et al (gajon, zhangshiming, gajoli, etc.. grain composition on the properties of dispersed corundum air brick material [ J ] refractory material, 2020,54(1):32-36.) in order to improve the mechanical properties and service life of the dispersed corundum air-permeable refractory material, the grain composition of the aggregate is blended, and when the mass ratio of large grains to medium grains is 0.5, the thermal shock stability and mechanical strength of the material are improved, but the air permeability is reduced; chenqilong and the like (Chenqilong, Qian Yi, bear Wei, corundum-spinel unburned gas permeable brick development and application [ A ]. seventeenth national refractory youth academic report discourse collection [ C ], 2020:5.) developed the corundum-spinel unburned gas permeable refractory, and the volume stability and strength are improved by changing the addition amount of spinel micro powder, after 6-9% of spinel micro powder is added, the material strength is greatly improved, but the thermal shock stability is not optimal; the novel diffuse type breathable refractory material which adopts the combination of the breathable inner core and the compact high-strength material has the advantages of stable air permeability, steel infiltration prevention of molten steel and the like, but the installation process is complicated, the requirement on argon blowing operation is high, and an air passage in the early stage of refining is easy to be blocked and cannot be blown open; the patent technology of composite dispersion air brick for steel ladle (CN 106380214A) discloses a composite dispersion air-permeable refractory material for steel ladle, which combines the functions of a dispersion air passage and a slit air passage, combines the advantages of the two, can not only achieve the purpose of dispersion air permeability, but also fully play the advantages of the slit air permeability in use safety, but also can not solve the problems of serious steel infiltration and slag infiltration of the air brick during steel tapping after refining; the patent technology of 'a composite electromagnetic field monitoring type steel ladle air brick' (CN108097942A) discloses a composite electromagnetic field monitoring type steel ladle air brick, and the electromagnetic field technology and the air brick are ingeniously combined, so that the downward permeation rate of molten steel and steel slag is reduced, the permeation degree and the erosion rate of a gas brick core are obviously reduced, but the mode can not avoid the damage or the blockage of the port of the air brick caused by the backflow of the molten steel and the steel slag.
Disclosure of Invention
The invention aims to provide a magnetic composite Tesla valve type slit air brick to solve the defects in the prior art, and the technical problem to be solved by the invention is realized by the following technical scheme.
The utility model provides a compound tesla valve type slit air brick of magnetism, includes the brick core that refractory material made, the inside of brick core is vertical to be provided with a plurality of tesla valve type air slits, the direction of ventilating of tesla valve type air slits is for switching on the direction from bottom to top, tesla valve type air slits are in inside even the arranging of brick core, be equipped with high temperature resistant solenoid in the brick core, high temperature resistant solenoid encircles and the central axis direction that its encircles around the outside of tesla valve type air slits and is vertical direction, the magnetostatic field direction that forms after high temperature resistant solenoid circular telegram is vertical direction and magnetic field intensity is greater than or equal to 1 mT.
Preferably, the bottom end of the brick core is sunken to form an air permeable chamber, and the air permeable chamber is communicated with the lower end of the Tesla valve type ventilation slit.
Preferably, a power supply is arranged in the ventilation chamber, the power supply is a direct current power supply, two ends of the high-temperature resistant electromagnetic coil are respectively connected with a positive electrode and a negative electrode of the power supply, the output voltage of the power supply is 50-250V, and the output current of the power supply is 2-20A.
Preferably, the surface of the power supply is coated with ceramic fiber cotton.
Preferably, the number of the Tesla valve type ventilation slits is 5-20.
Preferably, the brick core is in a cone frustum shape, and the outer part of the brick core is wrapped by the shell.
Preferably, the lower end of the shell is provided with a through hole, the through hole is connected with a vent pipe, and the vent pipe is communicated with the ventilation chamber.
Preferably, the brick core is made of one of corundum, corundum-spinel, chrome corundum-spinel, aluminum magnesium, zirconia and chrome corundum.
Preferably, the high-temperature resistant electromagnetic coil is made of one of carbon fiber, graphene fiber, platinum-rhodium alloy, nickel-plated copper alloy, mica high-temperature wire and nickel-plated stranded wire.
Preferably, the outer surface of the high-temperature resistant electromagnetic coil is coated with SiC-Si-Al daub; in the SiC-Si-Al cement: SiC content >80 wt%, Si content >2 wt%, Al content >12 wt%.
The magnetic composite Tesla valve type slit air brick provided by the invention has the following beneficial effects:
1) the invention utilizes the non-return function of the Tesla valve type ventilating slit, and can block the reverse seepage of the molten steel and the steel slag on the premise of not increasing internal moving parts; when the molten steel and the steel slag downwards penetrate along the vertical direction, the Tesla valve type air permeable slit can change the flowing direction of the steel slag and the molten steel, so that backflow is formed in the slit, and the movement rate of the steel slag and the molten steel is greatly reduced;
2) the invention skillfully combines the electromagnetic field technology with the Tesla valve, and utilizes the electrostatic magnetic field to inhibit the erosion and the penetration of molten steel and steel slag to the air brick in a non-contact way; after the high-temperature resistant electromagnetic coil is electrified, a stable static magnetic field in the vertical direction is generated in a Tesla valve type air permeable slit area in the brick core, molten steel and steel slag which downwards permeate through the air permeable slit are subjected to Lorentz force in the horizontal direction in the magnetic field, the downward movement is reduced, meanwhile, the movement speed of the molten steel and the steel slag is greatly reduced through the Tesla valve type air permeable slit, the time of the static magnetic field acting on the steel slag and the molten steel is greatly increased, the permeation and erosion reactions of the steel slag and the molten steel to all directions in the brick core are effectively inhibited, the damage of the air permeable brick caused by the molten steel, erosion and permeation is greatly reduced through the synergistic effect of the magnetic field and the Tesla valve air permeable slit, the blockage is avoided, and the service life of the air permeable brick is prolonged;
3) the high-temperature resistant electromagnetic coil adopted by the invention has the advantages of wide current regulation range, high temperature resistance, difficult oxidation and the like, so that the air brick has longer service life, the integration and synchronization of lining materials of a smelting container are promoted, and the aggravation of the erosion of the lining materials caused by frequent replacement of the air brick is reduced;
4) the invention can adjust the material and size according to different smelting conditions, and is suitable for smelting containers of various types and capacities;
5) the invention has simple structure, does not need other manual operations after installation and has simple control.
In conclusion, the invention has the characteristics of excellent corrosion and permeability resistance of the steel slag and the molten steel, long service life, simple and convenient operation and wide applicability.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the cross-sectional structure A-A in FIG. 1;
the reference numbers in the drawings are, in order: 1. high temperature resistant solenoid 2, brick core, 3, Tesla valve type ventilation slit, 4, casing, 5, power supply, 6, ventilation chamber, 7, breather pipe.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1 and 2, a magnetic composite tesla valve type slit air brick is improved in that: the electromagnetic coil comprises a brick core 2 made of refractory materials, wherein a plurality of tesla valve type ventilation slits 3 are vertically arranged in the brick core 2, the ventilation direction of the tesla valve type ventilation slits 3 is the conduction direction from bottom to top, the tesla valve type ventilation slits 3 are uniformly distributed in the brick core 2, a high-temperature resistant electromagnetic coil 1 is arranged in the brick core 2, the high-temperature resistant electromagnetic coil 1 surrounds the periphery of the outside of the tesla valve type ventilation slits 3, the direction of the surrounding central axis of the high-temperature resistant electromagnetic coil is the vertical direction, and the direction of a static magnetic field formed after the high-temperature resistant electromagnetic coil 1 is electrified is the vertical direction and the magnetic field intensity is larger than or equal to 1 mT.
The magnetic composite tesla valve type slit air brick provided by the embodiment utilizes the non-return function of the tesla valve type air slit 3, and can block reverse seepage of molten steel and steel slag on the premise of not increasing internal moving parts; when the molten steel and the steel slag penetrate downwards along the vertical direction, namely the molten steel and the steel slag flow into the slit from the inlet of the gas permeable slit 3 of the Tesla valve in the reverse flow direction, and because the resistance borne by the fluid in the reverse flow direction is large, the flow rate is very low; when the gas is introduced from bottom to top, namely the gas is introduced into the slit from the inlet of the gas permeable slit 3 of the Tesla valve, the resistance of the fluid in the forward flowing direction is small, and the gas flow rate is high. Therefore, the Tesla valve type ventilation slit has the characteristics of preventing the molten steel/steel slag from permeating downwards and ensuring the gas to flow upwards normally. Because the existing traditional directional type, straight-through hole type and labyrinth type slits have no one-way conduction function, compared with the existing one, the Tesla valve type slit structurally has better impermeability to molten steel/steel slag.
In the embodiment, the electromagnetic field technology and the Tesla valve are ingeniously combined, and the static magnetic field is utilized to inhibit the erosion and penetration of molten steel and steel slag on the air brick in a non-contact manner; when the electromagnetic coil is used, after the high-temperature resistant electromagnetic coil 1 is electrified, a stable static magnetic field in the vertical direction is generated in the region of the Tesla valve type air permeable slit 3 in the brick core 2, molten steel and steel slag which downwards permeate through the air permeable slit are subjected to Lorentz force in the horizontal direction in the magnetic field, and downwards movement is reduced, meanwhile, the movement speed of the molten steel and the steel slag is greatly reduced by the Tesla valve type air permeable slit 3, the time of the static magnetic field acting on the steel slag and the molten steel is greatly prolonged, the permeation and erosion reactions of the steel slag and the molten steel to all directions in the brick core are effectively inhibited, damage of the air permeable brick caused by the corrosion and the permeation of the steel slag and the molten steel is greatly reduced by the synergistic effect of the magnetic field and the Tesla valve air permeable slit 3, the blockage is avoided, the service life of the air permeable brick is prolonged, the structure is simple, and the control is simple. The effect on the steel slag/liquid steel penetrating motion is better when the magnetic field strength is larger, and since the effect is limited when the magnetic field strength is lower than 1mT, it is recommended that the magnetic field strength is not lower than 1 mT.
Further, the bottom end of the brick core 2 is sunken to form an air permeable chamber 6, and the air permeable chamber 6 is communicated with the lower end of the Tesla valve type air permeable slit 3.
Furthermore, a power supply 5 is arranged in the ventilation chamber 6, the power supply 5 is a direct current power supply, two ends of the high-temperature resistant electromagnetic coil 1 are respectively connected with the positive electrode and the negative electrode of the power supply 5, the output voltage of the power supply 5 is 50-250V, the output current is 2-20A, and when the high-temperature resistant electromagnetic coil is used, the power supply is turned on, so that the magnetic induction intensity of the high-temperature resistant electromagnetic coil 1 is kept at 1mT or above.
Further, the power supply 5 is annular or is connected in series to be annular, and the height of the power supply 5 is lower than that of the air permeable chamber 6.
Further, the surface of the power supply 5 is coated with ceramic fibers.
Further, the number of the Tesla valve type ventilation slits is 5-20.
Furthermore, the brick core 2 is in a cone frustum shape, and the outer part of the brick core 2 is wrapped by a shell 4.
Further, the lower extreme of casing 4 is equipped with the through-hole, the through-hole is connected with breather pipe 7, breather pipe 7 with ventilative chamber 6 is linked together.
Furthermore, the power supply 5 is formed by connecting 2-8 block-shaped batteries in series to form an annular shape, the inner diameter of the annular shape of the power supply 5 is 1-2 times of the inner diameter of the vent pipe 7, and the outer diameter of the annular shape of the power supply 5 is 0.6-0.8 times of the diameter of the vent chamber 6.
Furthermore, the brick core 2 is made of one of corundum, corundum-spinel, chrome corundum-spinel, aluminum magnesium, zirconia and chrome corundum, and the brick core made of the refractory materials can be adjusted in material and size according to different smelting conditions, is suitable for smelting containers of various types and capacities, and has wider applicability.
Furthermore, the high-temperature resistant electromagnetic coil 1 is made of one of carbon fiber, graphene fiber, platinum-rhodium alloy, nickel-plated copper alloy, mica high-temperature wire and nickel-plated stranded wire, and the high-temperature resistant electromagnetic coil 1 made of the materials has the advantages of wide current regulation range, high temperature resistance, difficulty in oxidation and the like, so that the air brick has a longer service life, the integration and synchronization of the lining material of the smelting container are promoted, and the corrosion aggravation of the lining material caused by frequent replacement of the air brick is reduced.
Further, the outer surface of the high-temperature resistant electromagnetic coil 1 is coated with SiC-Si-Al cement; further, in the SiC-Si-Al cement: SiC content >85 wt%, Si content >2 wt%, Al content >12 wt%.
It should be noted that the above detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise. Furthermore, it will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in other sequences than those illustrated or otherwise described herein.
Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, article, or apparatus.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may also be oriented in other different ways, such as by rotating it 90 degrees or at other orientations, and the spatially relative descriptors used herein interpreted accordingly.
In the foregoing detailed description, reference is made to the accompanying drawings, which form a part hereof. In the drawings, like numerals typically identify like components, unless context dictates otherwise. The illustrated embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be utilized, and other changes may be made, without departing from the spirit or scope of the subject matter presented here.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a compound tesla valve type slit air brick of magnetism which characterized in that: the high-temperature-resistant electromagnetic coil comprises a brick core (2) made of a refractory material, wherein a plurality of Tesla valve type ventilation slits (3) are vertically arranged in the brick core (2), the ventilation direction of the Tesla valve type ventilation slits (3) is the conduction direction from bottom to top, the Tesla valve type ventilation slits (3) are uniformly distributed in the brick core (2), a high-temperature-resistant electromagnetic coil (1) is arranged in the brick core (2), the high-temperature-resistant electromagnetic coil (1) surrounds the outer part of the Tesla valve type ventilation slits (3) and the surrounding central axis direction of the high-temperature-resistant electromagnetic coil is the vertical direction, and the static magnetic field direction formed after the high-temperature-resistant electromagnetic coil (1) is electrified is the vertical direction and the magnetic field intensity is more than or equal to 1 mT.
2. A magnetic composite tesla valve type slit air brick according to claim 1, characterized in that: the bottom end of the brick core (2) is sunken to form an air permeable chamber (6), and the air permeable chamber (6) is communicated with the lower end of the Tesla valve type air permeable slit (3).
3. A magnetic composite tesla valve type slit air brick according to claim 2, characterized in that: the high-temperature-resistant electromagnetic coil is characterized in that a power supply (5) is arranged in the air permeating chamber (6), the power supply (5) is a direct-current power supply, two ends of the high-temperature-resistant electromagnetic coil (1) are respectively connected with a positive electrode and a negative electrode of the power supply (5), the output voltage of the power supply (5) is 50-250V, and the output current of the power supply (5) is 2-20A.
4. A magnetic composite tesla valve type slit air brick according to claim 3, characterized in that: the surface of the power supply (5) is coated with ceramic fiber cotton.
5. A magnetic composite tesla valve type slit air brick according to claim 1, characterized in that: the number of the Tesla valve type ventilation slits is 5-20.
6. A magnetic composite tesla valve type slit air brick according to claim 2, characterized in that: the brick core (2) is in a cone frustum shape, and a shell (4) wraps the outside of the brick core (2).
7. The magnetic composite tesla valve type slit air brick as claimed in claim 6, wherein: the lower extreme of casing (4) is equipped with the through-hole, the through-hole is connected with breather pipe (7), breather pipe (7) with ventilative chamber (6) are linked together.
8. A magnetic composite tesla valve type slit air brick according to any one of claims 1 to 7, characterized in that: the brick core (2) is made of one of corundum, corundum-spinel, chrome corundum-spinel, aluminum magnesium, zirconia and chrome corundum.
9. A magnetic composite tesla valve type slit air brick according to any one of claims 1 to 8, characterized in that: the high-temperature resistant electromagnetic coil (1) is made of one of carbon fiber, graphene fiber, platinum-rhodium alloy, nickel-plated copper alloy, mica high-temperature wire and nickel-plated stranded wire.
10. A magnetic composite tesla valve type slit air brick according to any one of claims 1 to 9, characterized in that: the outer surface of the high-temperature resistant electromagnetic coil (1) is coated with SiC-Si-Al cement; in the SiC-Si-Al cement: SiC content >80 wt%, Si content >2 wt%, Al content >12 wt%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110612272.7A CN113333725B (en) | 2021-06-02 | 2021-06-02 | Magnetic composite Tesla valve type slit air brick |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110612272.7A CN113333725B (en) | 2021-06-02 | 2021-06-02 | Magnetic composite Tesla valve type slit air brick |
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| CN113333725A CN113333725A (en) | 2021-09-03 |
| CN113333725B true CN113333725B (en) | 2022-02-25 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2910418Y (en) * | 2006-05-12 | 2007-06-13 | 濮阳濮耐高温材料有限公司 | Integral air permeable bricks for preventing molten steel from leakage and infiltration |
| 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 |
| 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 |
| CN108097942A (en) * | 2017-12-29 | 2018-06-01 | 武汉科技大学 | A kind of composite electromagnetic field monitoring type air brick of steel ladle |
| CN110586915A (en) * | 2019-10-29 | 2019-12-20 | 攀钢集团攀枝花钢钒有限公司 | Construction method for preventing blockage of online steel ladle air brick |
| CN111421130A (en) * | 2020-04-01 | 2020-07-17 | 东北大学 | Air brick anti-seepage device and anti-seepage method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6673306B2 (en) * | 2001-04-13 | 2004-01-06 | North American Refractories Co. | Refractory lining for metallurgical vessel |
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2021
- 2021-06-02 CN CN202110612272.7A patent/CN113333725B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2910418Y (en) * | 2006-05-12 | 2007-06-13 | 濮阳濮耐高温材料有限公司 | Integral air permeable bricks for preventing molten steel from leakage and infiltration |
| 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 |
| 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 |
| CN108097942A (en) * | 2017-12-29 | 2018-06-01 | 武汉科技大学 | A kind of composite electromagnetic field monitoring type air brick of steel ladle |
| CN110586915A (en) * | 2019-10-29 | 2019-12-20 | 攀钢集团攀枝花钢钒有限公司 | Construction method for preventing blockage of online steel ladle air brick |
| CN111421130A (en) * | 2020-04-01 | 2020-07-17 | 东北大学 | Air brick anti-seepage device and anti-seepage method thereof |
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