CN114635015A - Ladle air brick and ladle of reinforcing molten bath stirring - Google Patents
Ladle air brick and ladle of reinforcing molten bath stirring Download PDFInfo
- Publication number
- CN114635015A CN114635015A CN202210313023.2A CN202210313023A CN114635015A CN 114635015 A CN114635015 A CN 114635015A CN 202210313023 A CN202210313023 A CN 202210313023A CN 114635015 A CN114635015 A CN 114635015A
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- ladle
- truncated cone
- main body
- slit
- shaped main
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- 239000011449 brick Substances 0.000 title claims abstract description 100
- 238000003756 stirring Methods 0.000 title claims abstract description 32
- 230000003014 reinforcing effect Effects 0.000 title description 2
- 230000002708 enhancing effect Effects 0.000 claims abstract description 28
- 238000009826 distribution Methods 0.000 claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 abstract description 51
- 239000010959 steel Substances 0.000 abstract description 51
- 239000007789 gas Substances 0.000 abstract description 29
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 abstract description 10
- 229910052786 argon Inorganic materials 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 239000011261 inert gas Substances 0.000 abstract description 4
- 238000006477 desulfuration reaction Methods 0.000 abstract description 2
- 230000023556 desulfurization Effects 0.000 abstract description 2
- 239000012535 impurity Substances 0.000 abstract 1
- 238000007664 blowing Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
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Classifications
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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
-
- 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
- C21C7/0075—Treating in a ladle furnace, e.g. up-/reheating of molten steel within the ladle
-
- 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
- C21C7/064—Dephosphorising; Desulfurising
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a steel ladle air brick for enhancing molten pool stirring and a steel ladle, wherein the steel ladle air brick comprises a circular truncated cone-shaped main body, a gas distribution chamber is arranged in the large end of the circular truncated cone-shaped main body, the large end of the circular truncated cone-shaped main body is connected with a gas inlet pipe, the gas inlet pipe is communicated with the gas distribution chamber, a plurality of slits are arranged in the circular truncated cone-shaped main body, one ends of the slits are communicated with the gas distribution chamber, the other ends of the slits extend to the end surface of the small end of the circular truncated cone-shaped main body, and the slits are rotationally symmetric about the central axis of the circular truncated cone-shaped main body; and the gas in the gas distribution chamber can form a rotational flow at the small end of the truncated cone-shaped main body after passing through the slit. In the using process, inert gases such as argon and the like can form swirl gas after passing through the swirl slit, so that bubbles are highly dispersed in molten steel, the contact area of gas flow and the molten steel is enlarged, and the flow of a molten pool in a steel ladle is promoted. Compared with the straight-through slit type steel ladle air brick, the stirring capacity is improved by more than 20%, the desulfurization rate can be improved by more than 5%, the impurity removal rate is improved by more than 5%, and the straight-through slit type steel ladle air brick has remarkable economic benefit.
Description
Technical Field
The invention belongs to the technical field of steel ladle bottom blowing in a steel making process, and particularly relates to a steel ladle air brick for enhancing molten pool stirring and a steel ladle.
Background
The steel ladle bottom blowing technology is a common technology in the steel making process at present, inert gases such as argon and the like are blown into molten steel through an air brick arranged at the bottom of a steel ladle, a molten pool is stirred by utilizing buoyancy of floating bubbles of the inert gases, so that the fluidity of the molten steel is enhanced, the temperature and the components of the molten steel are uniform, meanwhile, the bubbles can provide an adhesive matrix for non-metallic inclusions in the steel, the adhesive matrix is enabled to float upwards together with the bubbles into slag, the non-metallic inclusions in the steel are removed, and the components of the molten steel are accurately controlled.
The ladle air brick is a key functional element of a ladle bottom blowing technology and is of great importance to the metallurgical effect of the ladle bottom blowing technology. The slit type steel ladle air brick is widely applied due to the advantages of large adjustable range of air supply amount, good erosion resistance and the like. The most common type of air brick is a straight-through slit type air brick, and the central line of each slit of the slit type air brick is parallel to the central axis of the air brick. Since the flow of the gas in the slit type gas permeable brick is laminar, the gas flows formed after the gas passes through the slit are also parallel to each other. As the capacity of the ladle is gradually increased, it is necessary to increase the number of slits to enhance the air permeability of the air brick, but the increase of the number of slits weakens the erosion resistance of the air brick, thereby reducing the life of the air brick. Meanwhile, the arrangement positions of the air bricks are different, and the metallurgical effect difference achieved by the ladle bottom blowing technology is large. Therefore, in order to improve the air permeability of the air brick of the ladle and achieve better metallurgical effect, the optimization of the structure and the arrangement of the air brick is particularly important.
Disclosure of Invention
In order to solve the technical problems, the invention provides the steel ladle air brick and the steel ladle for enhancing the stirring of the molten pool, and the steel ladle air brick and the steel ladle can effectively remove the non-metallic inclusions in the molten steel, improve the cleanliness of the molten steel and simultaneously play a role in homogenizing the temperature and the components of the molten steel.
The technical scheme adopted by the invention is as follows:
a ladle air brick for enhancing molten pool stirring comprises a circular truncated cone-shaped main body, wherein a gas distribution chamber is arranged inside the large end of the circular truncated cone-shaped main body, the large end of the circular truncated cone-shaped main body is connected with a gas inlet pipe, the gas inlet pipe is communicated with the gas distribution chamber, a plurality of slits are arranged in the circular truncated cone-shaped main body, one ends of the slits are communicated with the gas distribution chamber, the other ends of the slits extend to the end face of the small end of the circular truncated cone-shaped main body, and the slits are rotationally symmetrical about the central axis of the circular truncated cone-shaped main body; and the gas in the gas distribution chamber can form a rotational flow at the small end of the truncated cone-shaped main body after passing through the slit.
Preferably, the slits are arranged at the small end and the large end of the truncated cone-shaped main body along the radial direction of the truncated cone-shaped main body; for each slit, the included angle of the ports at the two ends of the slit on the end surface of the main body along the circular truncated cone shape is 3-15 degrees; the shape and the size of the ports at the two ends of the slit are the same, and the distance between the ports at the two ends of the slit and the central shaft of the truncated cone-shaped main body is the same.
Preferably, the slit is a spatial curved slit formed by relatively rotating an original slit by 3 to 15 degrees through a large end face and a small end face of the truncated cone-shaped main body, the original slit is a rectangular slit, the axis of the rectangular slit is parallel to the central axis of the truncated cone-shaped main body, and the shape and the size of ports at two ends of the rectangular slit are the same.
Preferably, the number of the slits is 8-36.
Preferably, the cross section of the slit is rectangular, the thickness of the cross section of the slit is 0.10-0.18 mm, the ratio of the width of the cross section of the slit to the radius of the small end of the truncated cone-shaped main body is (1-2): 3, and the width directions of the rectangles of the slit on the small end of the truncated cone-shaped main body and the large end of the truncated cone-shaped main body respectively point to the centers of the circle of the working surface and the bottom surface.
Preferably, the air-dividing chamber is a cylindrical chamber coaxial with the truncated cone-shaped body.
The invention also provides a steel ladle which comprises a steel ladle body, wherein the steel ladle body is provided with the steel ladle air brick for enhancing molten pool stirring.
Preferably, the steel ladle is 30-400 t steel ladle.
Preferably, when the steel ladle has the capacity of 60t or below, the bottom of the steel ladle body adopts the steel ladle air brick for enhancing molten pool stirring, the steel ladle air brick for enhancing molten pool stirring is arranged between 0.3R and 0.8R in the radial direction of the bottom surface of the steel ladle body, and the included angle between the steel ladle air brick for enhancing molten pool stirring and the arc radius of a water gap on the steel ladle body is larger than 90 degrees, wherein R is the radius of the bottom surface of the steel ladle body.
Preferably, when the ladle is a ladle with the capacity of more than 60t, the bottom of the ladle body is provided with two ladle air bricks for enhancing molten pool stirring, the two ladle air bricks for enhancing molten pool stirring are respectively marked as a first ladle air brick and a second ladle air brick, the included angle between the first ladle air brick and the arc radius of the nozzle is 100-130 degrees, the included angle between the first ladle air brick and the arc radius of the second ladle air brick is 100-150 degrees, the distance from the first ladle air brick and the second ladle air brick to the center of the bottom surface of the ladle body is 0.5-0.65R, wherein R is the radius of the bottom surface of the ladle body.
The invention has the following beneficial effects:
the slits of the ladle gas permeable brick for enhancing molten pool stirring provided by the invention have a certain inclination angle, and the slits are rotationally symmetrical about the central axis of the truncated cone-shaped main body, so that the airflow direction of the gas permeable brick can be changed, and a gas rotational flow is formed by the rotational flow type slit arrangement, so that bubbles are dispersed in molten steel, the contact area of a gas flow stream and the molten steel is enlarged, and the flow of a molten pool in a ladle is promoted. Compared with the straight-through slit type ladle air brick, the ladle air brick provided by the invention has the advantages that the stirring capacity is improved by more than 20%, the desulfurization rate can be improved by more than 5%, and the inclusion removal rate is improved by more than 5% under the conditions of the same slit number, slit cross-sectional area and bottom blowing flow.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.
Fig. 1 is a schematic perspective view of a ladle gas brick for enhancing molten pool stirring provided by the invention.
Fig. 2 is a schematic view of a ladle provided by the present invention.
In the figure: 1-round table-shaped main body, 2-round table-shaped main body central shaft, 3-air distribution chamber, 4-bottom surface, 5-air inlet pipe, 6-slit, 7-slit central shaft, 8-working surface, 9-ladle body, 9-1-nozzle, 9-2-ladle air brick A, 9-3-ladle air brick B and 9-4-ladle air brick C.
Detailed Description
The ladle gas brick and the arrangement and use method thereof are further described with reference to the following examples, but the scope of the invention is not limited to these examples.
Referring to fig. 1, the ladle air brick for enhancing molten pool stirring comprises a circular table-shaped main body 1 and an air inlet pipe 5, wherein an air distribution chamber 3 is arranged inside the large end of the circular table-shaped main body 1, the air distribution chamber 3 is a cylindrical chamber coaxial with the circular table-shaped main body 1, the air inlet pipe 5 is connected to the center of the large end of the circular table-shaped main body 1, the air inlet pipe 5 is communicated with the air distribution chamber 3, a plurality of slits 6 are arranged in the circular table-shaped main body 1, the slits 6 form a slit group, one end of each slit 6 is communicated with the air distribution chamber 3, the other end of each slit 6 extends to the end face of the small end of the circular table-shaped main body 1, and the slits 6 are rotationally symmetrical about a central shaft 2 of the circular table-shaped main body 1; the slits 6 are combined to form a spiral-flow slit, inert gases such as argon gas and the like can form spiral-flow gas after passing through the spiral-flow slit, so that bubbles are highly dispersed in molten steel, the contact area of gas flow and the molten steel is enlarged, and the flow of a molten pool in a steel ladle is promoted. The number of the slits 6 is 8-36, the specific number is determined according to the capacity of the steel ladle, the large steel ladle is inclined to the upper limit, the small steel ladle is inclined to the lower limit, the cross section of the slit 6 is rectangular, the thickness is 0.10-0.18 mm, the ratio of the width to the radius of the working surface 8 of the body (namely the small end surface of the truncated cone-shaped main body 1) is (1-2): 3, and the width directions of the rectangles of the slits 6 on the working surface 8 and the bottom surface 4 respectively point to the circle centers of the working surface 8 and the bottom surface 4. The slit 6 is a space curved slit formed by relatively rotating the large end face and the small end face of the truncated cone-shaped main body 1 by 3-15 degrees, the original slit is a rectangular slit, the axis of the rectangular slit is parallel to the central axis 2 of the truncated cone-shaped main body, and the shape and the size of the ports at the two ends of the rectangular slit are the same.
The ladle air brick for enhancing molten pool stirring is suitable for 30-400 t ladles and is arranged according to the following method:
1 for ladles with the capacity of 60t or less, a ladle air brick A is adopted and arranged between 0.3R and 0.8R in the radial direction of a ladle body 9, wherein R is the radius of the bottom surface of the ladle, and the included angle between the ladle air brick A and the radius of the circular arc where a water gap is positioned is more than 90 degrees;
2 for the ladle with the capacity of more than 60t, two air bricks, namely a ladle air brick B and a ladle air brick C, are adopted, the included angle alpha between the ladle air brick B and the arc radius where the nozzle is positioned is 100-130 degrees, the included angle beta between the ladle air brick B and the arc radius where the ladle air brick C is positioned is 100-150 degrees, and the distance from the ladle air brick B and the ladle air brick C to the center of the bottom surface of the ladle is between 0.5R and 0.65R in the radial direction of the ladle body 9.
The ladle of the invention can effectively reduce the consumption of materials such as argon and the like, reduce the production cost, improve the production efficiency and have obvious economic benefit by reasonably arranging the ladle air brick of the invention.
Example 1:
the ladle air brick for enhancing molten pool stirring is applied to a 50t ladle, the slits 6 are slits with rectangular cross sections and are formed by relatively rotating the large end face and the small end face of the truncated cone-shaped main body 1 by 4 degrees, the number of the slits 6 is 16, and the thickness and the width of each slit 6 are 0.14mm and 20 mm. A ladle air brick A is arranged at a position of 0.45R (wherein R is the radius of the bottom surface of a ladle), and the included angle between the ladle air brick A and the radius of an arc where a water gap is positioned is 150 degrees.
Example 2:
the ladle air brick for enhancing molten pool stirring is applied to a 180t ladle, the slits 6 are slits with rectangular cross sections and are formed by relatively rotating the large end face and the small end face of the truncated cone-shaped main body 1 by 8 degrees, the number of the slits 6 is 24, and the thickness and the width of each slit 6 are 0.17mm and 30 mm. The method is characterized in that two air bricks, namely a ladle air brick B and a ladle air brick C are adopted, the included angle alpha between the ladle air brick B and the arc radius where a nozzle is located is 110 degrees, the included angle beta between the ladle air brick B and the arc radius where the ladle air brick C is located is 130 degrees, and the distance between the ladle air brick B and the ladle air brick C and the center of the bottom surface of a ladle is 0.55R.
Example 3:
the ladle air brick for enhancing molten pool stirring is applied to a 350t ladle, the slits 6 are slits with rectangular cross sections and are formed by relatively rotating the large end face and the small end face of the truncated cone-shaped main body 1 by 14 degrees, the number of the slits 6 is 32, and the thickness and the width of each slit 6 are 0.20mm and 36 mm. The method is characterized in that two air bricks, namely a ladle air brick B and a ladle air brick C are adopted, the included angle alpha between the ladle air brick B and the arc radius where a nozzle is located is 120 degrees, the included angle beta between the ladle air brick B and the arc radius where the ladle air brick C is located is 140 degrees, and the distance between the ladle air brick B and the ladle air brick C and the center of the bottom surface of a ladle is 0.60R.
The invention provides a novel steel ladle air brick, reasonably arranges the air brick, and is matched with a staged bottom blowing control system, so that the consumption of materials such as argon and the like is effectively reduced, the production cost is reduced, the production efficiency is improved, and the invention has obvious economic benefit on the premise of ensuring the molten steel quality.
Claims (10)
1. The ladle air brick for enhancing molten pool stirring is characterized by comprising a circular truncated cone-shaped main body (1), wherein a gas distribution chamber (3) is arranged inside the large end of the circular truncated cone-shaped main body (1), the large end of the circular truncated cone-shaped main body (1) is connected with an air inlet pipe (5), the air inlet pipe (5) is communicated with the gas distribution chamber (3), a plurality of slits (6) are arranged in the circular truncated cone-shaped main body (1), one ends of the slits (6) are communicated with the gas distribution chamber (3), the other ends of the slits (6) extend to the end face of the small end of the circular truncated cone-shaped main body (1), and the slits (6) are rotationally symmetrical about a central shaft (2) of the circular truncated cone-shaped main body (1); the gas in the gas distribution chamber (3) can form a rotational flow at the small end of the truncated cone-shaped main body (1) after passing through the slit (6).
2. The ladle gas brick for enhancing molten pool stirring according to claim 1, characterized in that the slits (6) are arranged along the radial direction of the truncated cone-shaped body (1) at the small end and the large end of the truncated cone-shaped body (1); for each slit (6), the included angle of the ports at the two ends of the slit (6) on the end surface of the main body (1) along the circular truncated cone shape is 3-15 degrees; the shape and the size of the ports at the two ends of the slit (6) are the same, and the distance between the ports at the two ends of the slit (6) and the central shaft (2) of the truncated cone-shaped main body is the same.
3. The ladle air brick for enhancing molten pool stirring according to claim 2, wherein the slit (6) is a slit of a spatial curved surface formed by relatively rotating the large end face and the small end face of the truncated cone-shaped main body (1) by 3-15 degrees, the original slit is a rectangular slit, the axis of the rectangular slit is parallel to the central axis (2) of the truncated cone-shaped main body, and the shape and the size of the ports at the two ends of the rectangular slit are the same.
4. The ladle gas brick for enhancing stirring of a molten pool according to any one of claims 1 to 3, characterized in that the number of the slits (6) is 8-36.
5. The ladle air brick for enhancing molten pool stirring according to claim 4 is characterized in that the cross section of the slit (6) is rectangular, the thickness of the cross section of the slit (6) is 0.10 mm-0.18 mm, the ratio of the width of the cross section of the slit (6) to the radius of the small end of the truncated cone-shaped main body (1) is (1-2): 3, wherein the width directions of the rectangles of the slit (6) on the small end of the truncated cone-shaped main body (1) and the large end of the truncated cone-shaped main body (1) respectively point to the centers of the circle of the working surface (8) and the bottom surface (4).
6. A ladle gas brick for enhancing molten bath stirring according to claim 1, characterized in that the gas-distributing chamber (3) is a cylindrical chamber coaxial with the truncated cone-shaped body (1).
7. A ladle, characterized by comprising a ladle body (9), wherein the ladle body (9) is provided with the ladle gas permeable brick for enhancing molten pool stirring of any one of claims 1 to 6.
8. The ladle according to claim 7, wherein the ladle is a 30-400 t ladle.
9. The ladle according to claim 8, wherein when the ladle has a capacity of 60t or less, the ladle gas permeable brick for enhancing molten pool stirring is arranged at the bottom of the ladle body (9) and is arranged between 0.3R and 0.8R in the radial direction of the bottom surface of the ladle body (9), and the included angle between the ladle gas permeable brick for enhancing molten pool stirring and the arc radius of a nozzle on the ladle body (9) is more than 90 degrees, wherein R is the radius of the bottom surface of the ladle body (9).
10. The ladle according to claim 8, wherein when the ladle has a capacity of more than 60t, the bottom of the ladle body (9) is provided with two ladle air bricks for enhancing molten pool stirring, the two ladle air bricks for enhancing molten pool stirring are respectively marked as a first ladle air brick and a second ladle air brick, the included angle between the first ladle air brick and the arc radius of the nozzle is 100-130 degrees, the included angle between the arc radius of the first ladle air brick and the arc radius of the second ladle air brick is 100-150 degrees, and the distance from the first ladle air brick and the second ladle air brick to the center of the bottom surface of the ladle body (9) is 0.5-0.65R, wherein R is the radius of the bottom surface of the ladle body (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210313023.2A CN114635015A (en) | 2022-03-28 | 2022-03-28 | Ladle air brick and ladle of reinforcing molten bath stirring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210313023.2A CN114635015A (en) | 2022-03-28 | 2022-03-28 | Ladle air brick and ladle of reinforcing molten bath stirring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114635015A true CN114635015A (en) | 2022-06-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210313023.2A Pending CN114635015A (en) | 2022-03-28 | 2022-03-28 | Ladle air brick and ladle of reinforcing molten bath stirring |
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| Country | Link |
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| CN (1) | CN114635015A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102274957A (en) * | 2011-08-05 | 2011-12-14 | 莱芜钢铁集团有限公司 | Steel ladle |
| JP2013142181A (en) * | 2012-01-11 | 2013-07-22 | Kobe Steel Ltd | Method for producing forging steel |
| CN206736296U (en) * | 2017-04-05 | 2017-12-12 | 海城市方宏耐火材料有限公司 | A kind of air brick of the two-way inclination angle slit of band and safety early warning device |
| CN107745112A (en) * | 2017-10-13 | 2018-03-02 | 武汉科技大学 | Slit air brick of steel ladle |
| CN208758606U (en) * | 2018-07-26 | 2019-04-19 | 河南海格尔高温材料有限公司 | A kind of anti-pinch steel air brick core |
| CN109762964A (en) * | 2019-03-13 | 2019-05-17 | 山东钢铁股份有限公司 | A kind of steel ladle bottom argon blowing method of refining |
| CN217149236U (en) * | 2022-03-28 | 2022-08-09 | 西安建筑科技大学 | Cyclone slit type steel ladle air brick and steel ladle |
-
2022
- 2022-03-28 CN CN202210313023.2A patent/CN114635015A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102274957A (en) * | 2011-08-05 | 2011-12-14 | 莱芜钢铁集团有限公司 | Steel ladle |
| JP2013142181A (en) * | 2012-01-11 | 2013-07-22 | Kobe Steel Ltd | Method for producing forging steel |
| CN206736296U (en) * | 2017-04-05 | 2017-12-12 | 海城市方宏耐火材料有限公司 | A kind of air brick of the two-way inclination angle slit of band and safety early warning device |
| CN107745112A (en) * | 2017-10-13 | 2018-03-02 | 武汉科技大学 | Slit air brick of steel ladle |
| CN208758606U (en) * | 2018-07-26 | 2019-04-19 | 河南海格尔高温材料有限公司 | A kind of anti-pinch steel air brick core |
| CN109762964A (en) * | 2019-03-13 | 2019-05-17 | 山东钢铁股份有限公司 | A kind of steel ladle bottom argon blowing method of refining |
| CN217149236U (en) * | 2022-03-28 | 2022-08-09 | 西安建筑科技大学 | Cyclone slit type steel ladle air brick and steel ladle |
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