CN215356149U - Ladle bottom double-blowing double-standby air brick assembly - Google Patents
Ladle bottom double-blowing double-standby air brick assembly Download PDFInfo
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- CN215356149U CN215356149U CN202121528193.XU CN202121528193U CN215356149U CN 215356149 U CN215356149 U CN 215356149U CN 202121528193 U CN202121528193 U CN 202121528193U CN 215356149 U CN215356149 U CN 215356149U
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Abstract
The utility model discloses a ladle bottom double-blowing double-standby air brick assembly which comprises a first air brick, a second air brick, a first air permeable core, a second air permeable core, a third air permeable core, a fourth air permeable core and an air blowing pipe group, wherein the first air brick and the second air permeable brick are arranged at the bottom of a ladle in parallel, the first air permeable core and the second air permeable core are arranged in the first air permeable brick, the third air permeable core and the fourth air permeable core are arranged in the second air permeable brick, the air blowing pipe group is connected with the first air permeable core, the second air permeable core, the third air permeable core and the fourth air permeable core, the air blowing pipe group blows air to the first air permeable core or the second air permeable core, and the air blowing pipe group blows air to the third air permeable core or the fourth air permeable core. The utility model aims to provide a ladle bottom double-blowing and double-standby air brick assembly which is reasonable in structure, prolongs the service life of an air brick, is convenient to replace, and is strong in thermal shock resistance, slag resistance and molten steel penetration resistance.
Description
Technical Field
The utility model relates to the field of inorganic non-metal refractory materials, in particular to a ladle bottom double-blowing double-standby air brick assembly.
Background
As steel mills have higher and higher requirements for steel quality, improvements in steel making technology and steel making process are required. The external refining technology is an important refining process part in the steelmaking process, and can adjust the steel components and the temperature of molten steel. The air brick is the most critical functional element which can be smoothly implemented by the process and plays an important role in the reliability and completeness of external refining. Because the steel ladle tends to be developed in a large scale, the smelting temperature and the smelting time are both increased successively, and the environment borne by the refractory material in the using process is more and more harsh, the performance of the air brick needs to be further improved so as to meet the requirements of the current steelmaking process and the steelmaking technology on the air brick, the air brick is a new energy-saving product with long service life, reasonable structural design, good thermal stability, erosion resistance and permeability resistance, high blow-through rate, safe and reliable operation, long service life and the like.
In this year (2001), the price of steel rises dramatically all the way, the profit is higher, each steel plant pours steel on duty more than necessary, and a plurality of steel plants ensure that each link of steel plant tapping, steel pouring, continuous casting and the like produces synchronously and smoothly in order to increase the total steel making energy, and each refractory material has a matched service life, thereby accelerating the production efficiency and saving the production cost, all refractory materials have to be prolonged in service life, the replacement time is reduced, and the service cycle is accelerated to lay a foundation for increasing the tapping quantity. Especially, in order to accelerate the hot turnover of the steel ladle, reduce the heat loss of the steel ladle and reduce the labor intensity of personnel, the air brick is also a restriction bottleneck, the service life is not neglected, and because a certain steel plant has more calcium treatment, higher Ca content, more steel varieties and clean steel, the time for blowing the air brick with argon is longer, the erosion is too fast, and the whole steel ladle is led to be off line in advance. For example: the service life of the whole ladle is 100 furnaces, argon is blown simultaneously by adopting one air permeable core at the left and right sides of the ladle bottom, the purpose of stirring molten steel is achieved by meeting the air permeability, after the maximum service life of the air permeable bricks reaches 50 furnaces, the ladle must be cooled down and replaced by new air permeable bricks, the ladle is baked and put into use for receiving molten steel, after the ladle bricks are cooled, the ladle body is affected by extreme cold and extreme heat, refractory materials of the ladle body are easy to crack and peel off, the service life of refractory bricks of the ladle is shortened, the normal turnover of the ladle is reduced, and the ladle brick is unfavorable for the whole contractor of refractory materials and the user of a steel mill, so that the double-blowing double-standby air permeable brick is developed to meet the service life of the whole ladle. The air brick is required to have enhanced scouring resistance, 100 percent blow-through rate, excellent thermal shock resistance and prolonged service life, and can accelerate the heat turnover of the steel ladle and the steel-making rhythm.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model aims to provide the ladle bottom double-blowing double-standby air brick assembly which is reasonable in structure, long in service life of the air brick, convenient to replace, strong in thermal shock resistance, and good in slag resistance and molten steel penetration resistance.
According to one aspect of the utility model, a ladle bottom double-blowing double-standby air brick assembly is provided, which comprises a first air brick, a second air brick, a first air permeable core, a second air permeable core, a third air permeable core, a fourth air permeable core and a blowing pipe group, wherein the first air brick and the second air permeable brick are arranged at the bottom of a ladle in parallel, the first air permeable core and the second air permeable core are arranged in the first air permeable brick, the third air permeable core and the fourth air permeable core are arranged in the second air permeable brick, the blowing pipe group is connected with the first air permeable core, the second air permeable core, the third air permeable core and the fourth air permeable core, the blowing pipe group blows air to the first air permeable core or the second air permeable core, and the blowing pipe group blows air to the third air permeable core or the fourth air permeable core.
In some embodiments, the blowing tube set comprises a main tube, and a first branch tube, a second branch tube, a third branch tube and a fourth branch tube which are communicated with the main tube, wherein the first branch tube is connected with the first air-permeable core, the second branch tube is connected with the second air-permeable core, the third branch tube is connected with the third air-permeable core, and the fourth branch tube is connected with the fourth air-permeable core.
In some embodiments, a first valve is disposed on the first branch pipe, a second valve is disposed on the second branch pipe, a third valve is disposed on the third branch pipe, and a fourth valve is disposed on the fourth branch pipe.
In some embodiments, the first air brick is provided with a first mounting hole and a second mounting hole, the first air core is fixed in the first mounting hole through fireclay, and the second air core is fixed in the second mounting hole through fireclay.
In some embodiments, the second air brick is provided with a third mounting hole and a fourth mounting hole, the third air core is fixed in the third mounting hole through fire clay, and the fourth air core is fixed in the fourth mounting hole through fire clay.
In some embodiments, first ventilative core includes body, air inlet, communicating pipe and slit, and the body is the toper, and the bottom of body is equipped with the air inlet, and communicating pipe is fixed in the air inlet, connects first branch pipe and air inlet communicating pipe, is equipped with a plurality of slits in this body, the outside and the air inlet of penetrating ventilative core of linking of slit.
In some embodiments, there are 20-30 slits and the slits are distributed in an annular array centered on the central axis of the body.
In some embodiments, the first air permeable core has the same structure as the second air permeable core, the third air permeable core, and the fourth air permeable core.
According to the ladle bottom double-blowing double-standby air brick assembly, the plurality of air permeable cores are arranged at the bottoms of the air bricks, inert gas is blown at intervals by the air permeable cores to stir molten steel for a long time, the components of the molten steel are uniform, the temperature of the molten steel is uniform, impurities are blown to the surface of a ladle to be convenient to clean, the purity of the molten steel is improved, and the service life is finally prolonged; meanwhile, the service life of the air brick is prolonged by using a plurality of air permeable cores at intervals.
Drawings
FIG. 1 is a schematic structural diagram of a ladle bottom double-blowing double-standby air brick assembly of the utility model;
FIG. 2 is a schematic structural diagram of a first air permeable core of a ladle bottom double-blowing double-standby air permeable brick assembly;
fig. 3 is a schematic distribution diagram of the slits of the ladle bottom double-blowing double-standby air brick assembly.
Detailed Description
The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that equivalent changes or substitutions in function, method or structure according to the embodiments are included in the scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or interconnected between two elements, directly or indirectly through intervening media, and the specific meaning of the terms may be understood by those skilled in the art according to their specific situation.
As shown in fig. 1, the ladle bottom double-blowing double-standby air brick assembly comprises a first air brick 1, a second air brick 2, a first air permeable core 3, a second air permeable core 4, a third air permeable core 5, a fourth air permeable core 6 and a blowing pipe group 7, wherein the first air brick 1 and the second air permeable brick 2 are arranged at the bottom of a ladle in parallel, the first air permeable core 3 and the second air permeable core 4 are arranged in the first air permeable brick 1, the third air permeable core 5 and the fourth air permeable core 6 are arranged in the second air permeable brick 2, the blowing pipe group 7 is connected with the first air permeable core 3, the second air permeable core 4, the third air permeable core 5 and the fourth air permeable core 6, the blowing pipe group 7 blows air to the first air permeable core 3 or the second air permeable core 4, and the blowing pipe group 7 blows air to the third air permeable core 5 or the fourth air permeable core 6. The bottom of the air brick is provided with a plurality of air permeable cores, inert gas is blown at intervals by the air permeable cores to stir molten steel for a long time, the components of the molten steel are uniform, the temperature of the molten steel is uniform, impurities are blown to the surface of a steel ladle to be convenient to clean, the purity of the molten steel is improved, and the service life is finally prolonged; meanwhile, the service life of the air brick is prolonged by using a plurality of air permeable cores at intervals. Certainly, the number of the air permeable cores cannot be increased without limit, because the air permeable bricks are used for a long time, the excessive increase of the air permeable cores only can cause waste, and the calculation shows that the two air permeable cores arranged on each air permeable brick are optimal.
When the first air brick 1 and the second air brick 2 are manufactured, 6% of MgO and Al2O3 are added to form a magnesium-aluminum spinel phase, so that the breaking strength of the air brick after heat treatment is increased, the thermal shock resistance is enhanced, and the thermal shock stability of corundum-spinel is superior to that of the traditional chrome steel jade air brick.
Meanwhile, when the first air brick 1 and the second air brick 2 are manufactured, in order to improve the slag resistance and the molten steel penetration resistance of the material, 3% of Cr2O3 or part of chromium corundum is usually added into the corundum spinel air brick. The Cr2O3 and a-Al 2O3 have the same crystal structure, and the Cr2O3 improves the slag resistance of the material, increases the wetting angle of the material and molten steel, and obviously improves the blockage of air holes of the air brick due to the penetration of the molten steel.
Furthermore, trace additives such as silicon nitride and sialon are added during the manufacture of the first air brick 1 and the second air brick 2, and form a solid solution phase with aggregate at high temperature, so that the high-temperature strength of the brick is increased, the permeability of the brick is improved, and the corrosion of slag in a ladle to the air bricks is resisted. After the air brick is subjected to high-temperature heat treatment, the service performance of the air brick is improved, and the higher use requirement of the air brick is met.
The air blowing tube group 7 comprises a main tube 71, and a first branch tube 72, a second branch tube 73, a third branch tube 74 and a fourth branch tube 75 which are communicated with the main tube 71, wherein the first branch tube 72 is connected with the first air permeable core 3, the second branch tube 73 is connected with the second air permeable core 4, the third branch tube 74 is connected with the third air permeable core 5, and the fourth branch tube 75 is connected with the fourth air permeable core 6. Inert gas is communicated by the main pipe 71, so that the gas enters the first branch pipe 72, the second branch pipe 73, the third branch pipe 74 and the fourth branch pipe 75, and then enters the first air permeable core 3, the second air permeable core 4, the third air permeable core 5 and the fourth air permeable core 6 to be blown into the steel ladle, so that the purposes of stirring the molten steel for a long time, homogenizing the components of the molten steel, homogenizing the temperature of the molten steel, blowing and floating impurities on the surface of the steel ladle to be convenient for cleaning, improving the purity of the molten steel and finally prolonging the service life are achieved.
The first branch pipe 72 is provided with a first valve 76, the second branch pipe 73 is provided with a second valve 77, the third branch pipe 74 is provided with a third valve 78, and the fourth branch pipe 75 is provided with a fourth valve 79. Because first ventilative core 3 and second ventilative core 4 are used alone, second ventilative core 4 blows and then prolongs air brick's life after first ventilative core 3 can not use really.
Be equipped with first mounting hole 11 and second mounting hole 12 on the first air brick 1, first ventilative core 3 is fixed in first mounting hole 11 through fireclay, and second ventilative core 4 is fixed in second mounting hole 12 through fireclay. The first and second breathable cores 3 and 4 are fixedly mounted by using fire clay for connection, meanwhile, the shapes of the first and second mounting holes 11 and 12 are the same as the shapes of the first and second breathable cores 3 and 4 and are slightly larger than the first and second breathable cores 3 and 4, and optimally, gaps of 2-3 mm are formed between the first and second mounting holes 11 and 12 and the first and second breathable cores 3 and 4.
And a third mounting hole 21 and a third mounting hole 22 are formed in the second air brick 2, the third air permeable core 5 is fixed in the third mounting hole 21 through fire clay, and the fourth air permeable core 6 is fixed in the third mounting hole 22 through fire clay. The third and fourth breathable cores 5 and 6 are fixedly mounted by using fire clay for connection, meanwhile, the shapes of the third and third mounting holes 21 and 22 are the same as those of the third and fourth breathable cores 5 and 6 and are slightly larger than those of the third and fourth breathable cores 5 and 6, and optimally, gaps of 2-3 mm are formed between the third and fourth mounting holes 21 and 22 and between the third and fourth breathable cores 5 and 6.
As shown in fig. 2, the first air permeable core 3 includes a body 31, an air inlet 32, a communication pipe 33 and a slit 34, the body 31 is conical, the air inlet 32 is disposed at the bottom of the body 31, the communication pipe 33 is fixed in the air inlet 32, the communication pipe 33 connects the first branch pipe 72 and the air inlet 32, a plurality of slits 34 are disposed in the body 31, and the slits 34 connect the outside of the air permeable core and the air inlet 32. Since the molten steel has a high density and viscosity, the slit 34 is not blocked, and the slit 34 is used to blow air.
As shown in fig. 3, the slits 34 are provided in 20 to 30 pieces and distributed in a circular array centered on the central axis of the body 31. By controlling the number and length of the slits 34, a good blow-through rate is ensured, and the service life thereof is prolonged.
The first air-permeable core 3 has the same structure as the second air-permeable core 4, the third air-permeable core 5, and the fourth air-permeable core 6. Is convenient for production and replacement.
When the ladle is used specifically, the first valve 76 and the third valve 78 are respectively opened by the first air brick 1 pipeline and the second air brick 2 pipeline, in addition, the second valve 77 for controlling the second air permeable core 4 and the fourth valve 79 for controlling the fourth air permeable core 6 are closed, the air permeable pipelines are closed by the valves after the first air permeable core 3 and the second air permeable core 4 are used for the specified service life, and the third valve 78 and the fourth valve 79 are opened to continuously blow argon gas and stir molten steel for use, so that the ladle cooling and offline replacement are not needed, the effect of continuous use of the whole ladle is achieved, the production rhythm is accelerated, and the cost is reduced.
The foregoing describes only some embodiments of the present invention and modifications and variations thereof will be apparent to those skilled in the art without departing from the spirit and scope of the utility model.
Claims (8)
1. The double-blowing double-standby air brick assembly is characterized by comprising a first air brick, a second air brick, a first air permeable core, a second air permeable core, a third air permeable core, a fourth air permeable core and a blowing pipe assembly, wherein the first air brick and the second air permeable brick are arranged at the bottom of a steel ladle in parallel, the first air permeable core and the second air permeable core are arranged in the first air permeable brick, the third air permeable core and the fourth air permeable core are arranged in the second air permeable brick, the blowing pipe assembly is connected with the first air permeable core, the second air permeable core, the third air permeable core and the fourth air permeable core, the blowing pipe assembly blows air to the first air permeable core or the second air permeable core, and the blowing pipe assembly blows air to the third air permeable core or the fourth air permeable core.
2. The ladle bottom double-blowing double-standby air brick assembly according to claim 1, wherein the air blowing pipe group comprises a main pipe, and a first branch pipe, a second branch pipe, a third branch pipe and a fourth branch pipe which are communicated with the main pipe, wherein the first branch pipe is connected with the first air permeable core, the second branch pipe is connected with the second air permeable core, the third branch pipe is connected with the third air permeable core, and the fourth branch pipe is connected with the fourth air permeable core.
3. The ladle bottom double-blowing double-standby air brick assembly as recited in claim 2, wherein a first valve is arranged on the first branch pipe, a second valve is arranged on the second branch pipe, a third valve is arranged on the third branch pipe, and a fourth valve is arranged on the fourth branch pipe.
4. The ladle bottom double-blowing double-standby air brick assembly according to any one of claims 1 to 3, wherein the first air brick is provided with a first mounting hole and a second mounting hole, the first air core is fixed in the first mounting hole through fire clay, and the second air core is fixed in the second mounting hole through fire clay.
5. The ladle bottom double-blowing double-standby air brick assembly according to any one of claims 1 to 3, wherein the second air brick is provided with a third mounting hole and a fourth mounting hole, the third air core is fixed in the third mounting hole through fire clay, and the fourth air core is fixed in the fourth mounting hole through fire clay.
6. The ladle bottom double-blowing double-standby air brick assembly according to claim 1, wherein the first air core comprises a body, an air inlet, a communicating pipe and slits, the body is conical, the bottom of the body is provided with the air inlet, the communicating pipe is fixed in the air inlet, the communicating pipe is connected with the first branch pipe and the air inlet, a plurality of slits are formed in the body, and the slits are connected with the outer part of the air core and the air inlet.
7. The ladle bottom double-blowing double-standby air brick assembly according to claim 6, wherein the number of the slits is 20-30 and is distributed in an annular array by taking the central axis of the body as a center.
8. The ladle bottom double-blowing double-standby air brick assembly according to claim 7, wherein the first air permeable core has the same structure as the second air permeable core, the third air permeable core and the fourth air permeable core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121528193.XU CN215356149U (en) | 2021-07-06 | 2021-07-06 | Ladle bottom double-blowing double-standby air brick assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121528193.XU CN215356149U (en) | 2021-07-06 | 2021-07-06 | Ladle bottom double-blowing double-standby air brick assembly |
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| CN215356149U true CN215356149U (en) | 2021-12-31 |
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| CN202121528193.XU Active CN215356149U (en) | 2021-07-06 | 2021-07-06 | Ladle bottom double-blowing double-standby air brick assembly |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114985715A (en) * | 2022-06-21 | 2022-09-02 | 芜湖新兴铸管有限责任公司 | Multi-group air brick steel ladle equipment and steel ladle smelting control method |
-
2021
- 2021-07-06 CN CN202121528193.XU patent/CN215356149U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114985715A (en) * | 2022-06-21 | 2022-09-02 | 芜湖新兴铸管有限责任公司 | Multi-group air brick steel ladle equipment and steel ladle smelting control method |
| CN114985715B (en) * | 2022-06-21 | 2023-11-17 | 芜湖新兴铸管有限责任公司 | Ladle equipment with multiple groups of air bricks and ladle smelting control method |
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