CN210856205U - Circular seam type bottom blowing air supply brick - Google Patents
Circular seam type bottom blowing air supply brick Download PDFInfo
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- CN210856205U CN210856205U CN201920897173.6U CN201920897173U CN210856205U CN 210856205 U CN210856205 U CN 210856205U CN 201920897173 U CN201920897173 U CN 201920897173U CN 210856205 U CN210856205 U CN 210856205U
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- circular seam
- bottom blowing
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- brick
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Abstract
The utility model relates to a circular seam formula end-blown air feed brick belongs to metallurgical technical field, has solved among the prior art too big easy erosion refractory material of end-blown flow or the too big easy problem that blocks up of pipeline pressure loss. The circular seam type bottom blowing air supply brick comprises a main body and an air channel, wherein the air channel comprises a circular seam type air outlet pipe, an air distribution chamber and an air inlet pipe, and the circular seam type air outlet pipe comprises a central pipe, an outer sleeve and a circular seam. The number of the outer layer sleeves is multiple, and a circular seam is formed between the multiple outer layer sleeves or between the outer layer sleeves and the central pipe. The utility model discloses a bottom blowing gas adjusts on a large scale, realizes bottom blowing gas stream dispersion when improving bottom blowing gas capacity to finally realize the high-efficient long-life of bottom blowing.
Description
Technical Field
The utility model relates to the technical field of metallurgy, especially, relate to an air feed brick is blown at bottom of circumferential seam formula.
Background
With the continuous development of metallurgical technology, in the smelting process, high stirring gas is blown into a smelting molten pool from the bottom of the molten pool to stir liquid metal, so that the effects of homogenizing components and temperature, accelerating mass transfer, promoting slag-gold balance and removing non-metal impurities can be achieved, and the metallurgical efficiency and quality are improved.
The bottom blowing air supply elements commonly used in the metallurgical industry at present are bottom blowing guns and bottom blowing bricks. Although the existing bottom blowing gas supply elements can realize bottom blowing gas supply and are matched with a good maintenance process, the long service life of bottom blowing can be realized, and even the synchronization of the bottom blowing service life and the furnace life can be realized, the problems that the bottom blowing brick has low bottom blowing high flow and overlarge pipeline pressure loss and is easy to block exist, and the problems that the bottom blowing gun has funnel-shaped erosion of a bottom blowing nozzle, poor gas dispersibility in the process of bottom blowing high flow and the like exist.
SUMMERY OF THE UTILITY MODEL
In view of the above analysis, the present invention aims to provide a circular seam type bottom blowing air brick, which can at least solve one of the following technical problems: (1) the refractory material is easy to corrode due to the overlarge bottom blowing flow; (2) the pipeline is easy to block due to overlarge pressure loss; (3) the bottom blowing high flow of the bottom blowing brick is lower; (4) the bottom blowing nozzle has funnel-shaped erosion and poor gas dispersibility in the case of bottom blowing high flow.
The purpose of the utility model is mainly realized through the following technical scheme:
the utility model provides a circular seam formula bottom blowing air feed brick, including main part and gas passage, gas passage includes circular seam formula outlet duct, circular seam formula outlet duct includes center tube, outer sleeve pipe and circular seam.
On the basis of the above scheme, the utility model discloses following improvement has still been made:
further, the internal diameter of center tube is 2 ~ 10 mm.
Further, the wall thickness of the central tube is 0.2-2 mm.
Furthermore, the number of the outer-layer sleeves is 2-5.
Further, the annular seam is formed between the outer sleeves or between the outer sleeves and the central pipe.
Furthermore, the number of the annular seam type air outlet pipes is 1-20, and can be any natural number between 1 and 20.
Furthermore, the plurality of circular seam type air outlet pipes are distributed in a triangular shape, a square shape, a circular shape or a linear shape.
Further, the distance between adjacent annular seam type air outlet pipes is 1-10 times of the outer diameter of the outermost sleeve.
Furthermore, the wall thickness of the outer sleeve is 0.2-2.5 mm.
Furthermore, the width of the circular seam is 0.2-2 mm.
The utility model discloses can realize one of following beneficial effect at least:
(1) through designing annular seam formula outlet duct for the structure including center tube, outer sleeve pipe and annular seam, can reduce the risk of molten steel seepage or flowing backward when guaranteeing bottom blowing air supply volume to increase the control range of bottom blowing air supply volume.
(2) The width through control circumferential weld is 0.2 ~ 2mm, has both reduced the risk of seepage, can reduce the friction between the pipe wall again to effectively increase bottom blowing air feed flow.
(3) The inner diameter through control center tube can guarantee that air feed flow can satisfy the user demand for 2 ~ 10mm, is favorable to controlling air feed flow again.
(4) The wall thickness through control center tube is 0.2 ~ 2mm for neither can lead to the deformation of circumferential weld formula outlet duct because the center tube is too thin, influence the ventilation effect of circumferential weld passageway, can not influence circumferential weld formula outlet duct quantity and arrange because the wall thickness is too thick again.
(5) Through selecting specific mode of laying, make the utility model discloses a circumferential weld formula outlet duct does benefit to processing, easily arranges, is convenient for ventilate.
(6) By selecting the specific number of the circular seams and the number of the outer sleeves, the bottom blowing air supply brick can enhance the air permeability and does not influence the number of the circular seam type bottom blowing air supply bricks in the whole converter arrangement.
(7) By selecting the specific distance between the adjacent circular seam type air outlet pipes, the ventilation effect can be ensured, and small condensates can be connected into a large ventilation condensate, so that the protection of the air outlet is facilitated.
(8) Through controlling the wall thickness of the outer sleeve, the utility model discloses the corrosion resistance of air brick is blown at the bottom to the safety in utilization has been improved.
The utility model discloses in, can also make up each other between the above-mentioned each technical scheme to realize more preferred combination scheme. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout the drawings.
FIG. 1 is a schematic view of a circular seam type bottom blowing air brick according to an embodiment of the present invention;
FIG. 2 is a top view of an annular gap type air outlet pipe of an annular gap type bottom blowing air supply brick according to an embodiment of the present invention;
fig. 3 is the circular seam type bottom blowing air supply brick circular seam type air outlet pipe layout schematic diagram of the embodiment of the utility model.
Reference numerals:
1. a main body; 2. a gas channel; 2-1, a circular seam type air outlet pipe; 2-1-1, central tube; 2-1-2, outer layer sleeve; 2-1-3, circular seam; 2-1-4, central pipe plugging; 2-2, a gas distribution chamber; 2-3, an air inlet pipe.
Detailed Description
The following detailed description of the preferred embodiments of the invention, which is to be read in connection with the accompanying drawings, forms a part of the invention, and together with the embodiments of the invention, serve to explain the principles of the invention and not to limit the scope of the invention.
The utility model discloses a concrete embodiment discloses a circular seam formula bottom blowing air feed brick, as shown in fig. 1-3, including main part 1 and gas channel 2, gas channel 2 includes circular seam formula outlet duct 2-1, gas distribution room 2-2 and intake pipe 2-3, and circular seam formula outlet duct 2-1 includes center tube 2-1-1, outer sleeve pipe 2-1-2 and circular seam 2-1-3.
In the prior art, for the blowing of bottom blowing gas, under the condition of certain pressure, the outlet area determines the gas flow, and in order to achieve certain flow, a certain outlet area is needed; secondly, when the diameter is bigger, the air supply volume is too big, resulting in the reduction of the adjustable range of the flow. In addition, the diameter is increased, which means the caliber is large, and the risk of molten steel leakage or backflow is increased.
Compared with the prior art, the annular seam type bottom blowing gas supply brick is suitable for converters, electric furnaces and various refining furnaces with bottom blowing gas stirring functions, overcomes the defects that in the prior art, the bottom blowing gas is too large in flow rate and easily erodes refractory materials or pipeline pressure loss is too large and easily blocks, achieves large-range internal adjustment of the bottom blowing gas, improves the bottom blowing gas supply amount, achieves bottom blowing gas stream dispersion, further reduces the vacuum degree of a molten pool, promotes slag-gold balance of the molten pool, and finally achieves high-efficiency and long-life bottom blowing.
Specifically, the circular seam type air outlet pipe 2-1 of the embodiment comprises a central pipe 2-1-1, an outer layer sleeve 2-1-2 and a circular seam 2-1-3, and by means of the design, the risk of molten steel leakage or backflow can be reduced while the bottom blowing air supply amount is guaranteed, and the adjusting range of the bottom blowing air supply amount is enlarged.
The utility model discloses well circumferential weld width indicates the radius difference of circumferential weld inner ring and outer loop. Considering that when the width of the circular seam 2-1-3 is less than 0.2mm, on one hand, the processing difficulty is increased, and on the other hand, the friction between the pipe walls is increased, so that the friction loss in the air supply process is increased, and the difficulty in increasing the air supply flow of bottom blowing is increased. When the width of the circular seam 2-1-3 is larger than 2mm, the gap is too large, leakage risks exist, and particularly the leakage risks are very large under the condition of low-pressure air supply, so that the width of the circular seam 2-1-3 is set to be 0.2-2 mm, the risk of leakage is reduced, friction between pipe walls can be reduced, and accordingly bottom blowing air supply flow is effectively increased.
Although the circular seam is vented, the flow rate is in direct proportion to the area of the air supply pipeline under the condition of a certain pressure. The flow rate is related to the equivalent area of the circular seam, and the size of the circular seam area is directly related to the size of the central pipe, so that the size of the central pipe is strictly controlled. Through years of innovative research, the area of the circular seam is relatively large when the inner diameter of the central tube is larger than 10mm, the air supply flow is large, and the control is not facilitated; when the inner diameter of the central tube is less than 2mm, the relatively small area of the circular seam is not beneficial to control. Therefore, the inner diameter of the control center pipe 2-1-1 is 2-10 mm, so that the air supply flow can be ensured to meet the use requirement, and the control of the air supply flow is facilitated.
Considering the stability problem of the circular seam type air outlet pipe, the wall thickness of the central pipe 2-1-1 is selected to be 0.2-2 mm. This is because: when the wall thickness of the central tube 2-1-1 is less than 0.2mm, the annular seam type air outlet tube is too thin, so that the stability of the annular seam type air outlet tube is poor, and particularly, the ventilation effect of an annular seam channel can be influenced once the annular seam type air outlet tube is deformed under the high-temperature condition; when the wall thickness of the central tube 2-1-1 is larger than 2mm, the area of the circular seam type air outlet tube is increased due to the excessive thickness of the circular seam type air outlet tube, and the quantity and the arrangement of the circular seam type air outlet tubes are influenced. Illustratively, a central tube (2-1-1) with a wall thickness of 1mm is selected.
Considering that the length of the outer sleeve 2-1-2 generally exceeds 1m, if the wall thickness is less than 0.2mm, on one hand, the outer sleeve 2-1-2 is easy to deform and has poor stability; and on the other hand, the processing difficulty is high. And if the wall thickness is more than 2.5mm, the diameter of the annular seam type air outlet pipe 2-1 is large, so that the ratio of the specific surface area of the annular seam type air outlet pipe 2-1 to the specific surface area of the bottom blowing air supply brick is increased, the corrosion resistance of the bottom blowing air supply brick is poor, and the use safety is reduced. Therefore, in this embodiment, the wall thickness of the outer sleeve 2-1-2 is controlled to be 0.2-2.5 mm.
And selecting the arrangement mode according to the number of the annular seam type air outlet pipes on the same bottom blowing air supply brick. Illustratively, the plurality of circular seam type air outlet pipes 2-1 are arranged as follows: the connection line of the end points on the same side of the circular seam type air outlet pipe 2-1 forms a triangle, a square, a circle, a circular ring or a straight line shape, as shown in figure 3. The arrangement mode is beneficial to processing, easy to arrange and convenient to ventilate.
It is worth noting that the increase of the number of circular seams means the increase of the ventilation area, the larger the ventilation area is, the stronger the ventilation capacity is, but the increase of the ventilation area can affect the number of circular seam type bottom blowing ventilation branches in the same bottom blowing air supply brick, and further affect the number of circular seam type bottom blowing air supply bricks in the whole converter arrangement. In the embodiment, the number of the outer sleeves 2-1-2 is 1-5, preferably 2 outer sleeves 2-1-2.
In consideration of the maintenance problem of the bottom-blowing gas supply brick, the distance L between the adjacent annular seam type gas outlet pipes 2-1 is selected to be 1-10 times of the outer diameter (D) of the outermost sleeveN) Namely: l is 1-10DNThis is because: the gas blown into the molten pool by each annular-slot type gas outlet pipe is normal-temperature gas, and is cold-state gas for high-temperature molten steel or molten iron, and the blowing of the cold-state gas can generate condensation effect, so that dispersed condensation ventilation is generated at the end part of the gas outlet hole, and iron or iron slag mixture is condensed. If the distance is too small, the processing is not facilitated, and condensate is interfered with each other to influence ventilation; because the connection of the individual small condensates into a large gas-permeable condensate is more favorable for the protection of the gas outlet, whereas if the spacing is too large, no connection between the condensates is possible, which is unfavorable for bridging the connection between the individual small condensates. Therefore, the distance between the adjacent annular seam type air outlet pipes 2-1 is 1-10DN。
In this example, L isN-LN-10.2-0.5 mm, namely the thickness of the outer sleeve of the outermost layer is larger than that of the outer sleeve of other layers0.2-0.5 mm thick, LN-1＝LCenter of a shipI.e. the thickness of the outer jacket of the other layers is the same as the thickness of the central tube.
Considering that the thickness of the pipe wall relates to the stability of the annular seam type air outlet pipe, in this embodiment, the thickness of all the outer sleeves is not the same as that of the central pipe, but the thickness of the outer sleeve at the outermost layer is a little larger than that of the outer sleeves at other layers, and the design is to increase the stability of the annular seam pipe. Exemplarily, LN-LN-10.2-0.5 mm because: when the thickness difference is less than 0.2mm, the processing difficulty is high, and the stability is poor; and the thickness difference is 0.5mm, so that the strength requirement can be met.
And if the thickness of each layer of sleeve is larger than that of the central pipe, the diameter of the annular seam type air outlet pipe 2-1 is large, and the ratio of the specific surface area of the annular seam type air outlet pipe 2-1 to the specific surface area of the bottom blowing air supply brick is increased, so that the corrosion resistance of the bottom blowing air supply brick is poor, and the use safety is reduced. And the thickness of the outer layer sleeve of other layers is the same as that of the central pipe, so that the use requirement can be met. Therefore, L in this exampleN-1＝LCenter of a ship。
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention.
Claims (9)
1. The circular seam type bottom blowing air supply brick is characterized by comprising a main body (1) and an air channel (2), wherein the air channel (2) comprises a circular seam type air outlet pipe (2-1), and the circular seam type air outlet pipe (2-1) comprises a central pipe (2-1-1), an outer layer sleeve pipe (2-1-2) and a circular seam (2-1-3);
the inner diameter of the central tube (2-1-1) is 2-10 mm.
2. The circular seam type bottom-blowing gas brick as claimed in claim 1, wherein the wall thickness of the central tube (2-1-1) is 0.2-2 mm.
3. The circular seam type bottom-blown gas brick according to claim 1, wherein the number of the outer sleeves (2-1-2) is 2-5.
4. The circular seam type bottom-blown gas brick according to claim 3, characterized in that the circular seam (2-1-3) is formed between the outer sleeves (2-1-2) or between the outer sleeve (2-1-2) and the central tube (2-1-1).
5. The circular seam type bottom blowing gas supply brick as claimed in any one of claims 1 to 4, characterized in that the number of the circular seam type gas outlet pipes (2-1) is 1 to 20.
6. The circular seam type bottom-blowing gas supply brick as claimed in claim 5, characterized in that the plurality of circular seam type gas outlet pipes (2-1) are arranged in one of a triangular shape, a square shape, a circular shape or a straight shape.
7. The circular seam type bottom-blowing air supply brick according to claim 5, characterized in that the distance between adjacent circular seam type air outlet pipes (2-1) is 1-10 times of the outer diameter of the outermost sleeve.
8. The circular seam type bottom-blown gas brick according to claim 1, wherein the wall thickness of the outer sleeve (2-1-2) is 0.2-2.5 mm.
9. The circular seam type bottom-blown gas brick according to any one of claims 6 to 8, wherein the width of the circular seam (2-1-3) is 0.2 to 2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920897173.6U CN210856205U (en) | 2019-06-14 | 2019-06-14 | Circular seam type bottom blowing air supply brick |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920897173.6U CN210856205U (en) | 2019-06-14 | 2019-06-14 | Circular seam type bottom blowing air supply brick |
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| CN210856205U true CN210856205U (en) | 2020-06-26 |
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| CN201920897173.6U Expired - Fee Related CN210856205U (en) | 2019-06-14 | 2019-06-14 | Circular seam type bottom blowing air supply brick |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022042996A (en) * | 2020-09-03 | 2022-03-15 | 鋼鉄研究総院 | Annular slot type air supply means and air supply method |
-
2019
- 2019-06-14 CN CN201920897173.6U patent/CN210856205U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022042996A (en) * | 2020-09-03 | 2022-03-15 | 鋼鉄研究総院 | Annular slot type air supply means and air supply method |
| JP7284228B2 (en) | 2020-09-03 | 2023-05-30 | 鋼鉄研究総院 | Annular slot type air supply means and air supply method |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200626 |
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| CF01 | Termination of patent right due to non-payment of annual fee |