CN110205444A - A kind of circular seam type bottom blowing gas-feeding brick - Google Patents
A kind of circular seam type bottom blowing gas-feeding brick Download PDFInfo
- Publication number
- CN110205444A CN110205444A CN201910517535.9A CN201910517535A CN110205444A CN 110205444 A CN110205444 A CN 110205444A CN 201910517535 A CN201910517535 A CN 201910517535A CN 110205444 A CN110205444 A CN 110205444A
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- CN
- China
- Prior art keywords
- circular seam
- seam type
- bottom blowing
- gas
- outer layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/04—Casings; Linings; Walls; Roofs characterised by the form, e.g. shape of the bricks or blocks used
- F27D1/06—Composite bricks or blocks, e.g. panels, modules
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D27/00—Stirring devices for molten material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Furnace Charging Or Discharging (AREA)
Abstract
The present invention relates to a kind of circular seam type bottom blowing gas-feeding bricks, belong to metallurgical technology field, solve the problems, such as the excessive easy erosion of refractory of bottom blowing flow in the prior art or the excessive easy blocking of pressure loss in piping.Circular seam type bottom blowing gas-feeding brick, including main body and gas passage, gas passage include circular seam type escape pipe, gas distributing chamber and air inlet pipe, and circular seam type escape pipe includes central tube, outer layer sleeve and circumferential weld.The quantity of outer layer sleeve be it is multiple, form circumferential weld between multiple outer layer sleeves or between outer layer sleeve and central tube.The present invention realizes a wide range of interior adjusting of bottom blown gas, realizes that bottom blown gas stream stock dissipates while improving bottom blowing gas tolerance, and finally realize bottom blowing efficient and long life.
Description
Technical field
The present invention relates to metallurgical technology field more particularly to a kind of circular seam type bottom blowing gas-feeding bricks.
Background technique
As metallurgical technology continues to develop, in smelting process, it is blown into high stirring gas from molten bath bottom to molten bath is smelted,
Liquid metal is stirred, non-uniform components and temperature can be played, accelerate mass transfer, promote slag-melt equilibration, the nonmetallic folder of removal
Miscellaneous effect, to improve metallurgical efficiency and quality.
The common bottom-blowing air feed element of metallurgy industry is bottom blowing gun and bottom blowing brick at present.Although existing bottom-blowing air feed element
It can realize that the bottom blowing long-life may be implemented in bottom blowing gas, the service procedure of no-float, it might even be possible to realize the bottom blowing service life
It is synchronous with furnace life, but all have that bottom blowing high flow capacity is relatively low, the excessive susceptible to plugging problem of pressure loss in piping for bottom blowing brick, it is right
When all there is the erosion of bottom blowing funnel with nozzle shape, bottom blowing high flow capacity in bottom blowing gun the problems such as gas bad dispersibility.
Summary of the invention
In view of above-mentioned analysis, the present invention is intended to provide a kind of circular seam type bottom blowing gas-feeding brick, is at least able to solve following skill
One of art problem: (1) the excessive easy erosion of refractory of bottom blowing flow；(2) the excessive easy blocking of pressure loss in piping；(3) bottom
The bottom blowing high flow capacity for blowing brick is relatively low；(4) gas bad dispersibility when the erosion of bottom blowing funnel with nozzle shape, bottom blowing high flow capacity.
The purpose of the present invention is mainly achieved through the following technical solutions:
The present invention provides a kind of circular seam type bottom blowing gas-feeding brick, including main body and gas passage, the gas passage includes
Circular seam type escape pipe, gas distributing chamber and air inlet pipe, the circular seam type escape pipe include central tube, outer layer sleeve and circumferential weld.
On the basis of above scheme, the present invention has also done following improvement:
Further, the quantity of the outer layer sleeve is multiple, between multiple outer layer sleeves or outer layer sleeve and central tube it
Between form the circumferential weld.
Further, the width of the circumferential weld is 0.2~2mm.
Further, the internal diameter of the central tube is 2~10mm, and wall thickness is 0.2~2mm.
Further, the wall thickness of the outer layer sleeve is 0.2~2.5mm.
Further, the quantity of the circular seam type escape pipe is 1~20, such as can be any natural number between 1 to 20.
Further, multiple circular seam type escape pipe cloth are set as one in triangle, square, circle, circular ring shape or linear
Kind.
Further, the quantity of the outer layer sleeve is equal to the quantity of the circumferential weld.
Further, the quantity of the outer layer sleeve is 2~5, preferred amount 2.
Further, the spacing of adjacent circular seam type escape pipe is the outer diameter of 1~10 times of outermost layer casing.
The present invention can at least realize one of following beneficial effect:
(1) by circular seam type escape pipe is designed as include central tube, outer layer sleeve and circumferential weld structure, can guarantee
While bottom blowing gas amount, the risk of molten steel leakage or reverse irrigation is reduced, and increases the adjustable range of bottom blowing gas amount.
(2) it is 0.2~2mm by the width of control circumferential weld, had not only reduced the risk of leakage, but also can reduce between tube wall
Friction, to effectively increase bottom blowing gas flow.
It (3) is that 2~10mm not only can guarantee that gas supply flow can satisfy use demand, but also have by the internal diameter of control centre's pipe
Conducive to control gas supply flow.
It (4) is 0.2~2mm by the wall thickness of control centre's pipe, so that both will not be too thin because of central tube, lead to circular seam type
Escape pipe deformation, influences the air permeability effect in circumferential weld channel, and will not be too thick because of wall thickness, influences circular seam type escape pipe quantity and cloth
It sets.
(5) by way of selecting specific layings so that circular seam type escape pipe of the invention be conducive to processing, be easy to arrangement,
Convenient for ventilation.
(6) by selecting the quantity of specific circumferential weld quantity and outer layer sleeve, so that the bottom blowing gas-feeding brick is ventilative in enhancing
While ability, and the quantity of circular seam type bottom blowing gas-feeding brick in entire converter arrangement is not influenced.
(7) by selecting the spacing of specific adjacent circular seam type escape pipe, it not only can guarantee air permeability effect, but also make each small
Condensate can connect into big ventilative condensate, to be conducive to the protection of gas outlet.
(8) by the wall thickness of control outer layer sleeve, the corrosion resistance of bottom blowing gas-feeding brick of the present invention is improved, so that improving makes
Use safety.
It in the present invention, can also be combined with each other between above-mentioned each technical solution, to realize more preferred assembled schemes.This
Other feature and advantage of invention will illustrate in the following description, also, certain advantages can become from specification it is aobvious and
It is clear to, or understand through the implementation of the invention.The objectives and other advantages of the invention can be by specification embodiment and attached
It is achieved and obtained in specifically noted content in figure.
Detailed description of the invention
Attached drawing is only used for showing the purpose of specific embodiment, and is not to be construed as limiting the invention, in entire attached drawing
In, identical reference symbol indicates identical component.
Fig. 1 is the circular seam type bottom blowing gas-feeding brick schematic diagram of the embodiment of the present invention；
Fig. 2 is the circular seam type bottom blowing gas-feeding brick circular seam type escape pipe top view of the embodiment of the present invention；
Fig. 3 is the circular seam type bottom blowing gas-feeding brick circular seam type escape pipe arrangement schematic diagram of the embodiment of the present invention.
Appended drawing reference:
1, main body；2, gas passage；2-1, circular seam type escape pipe；2-1-1, central tube；2-1-2, outer layer sleeve；2-1-3,
Circumferential weld；2-1-4, central tube block material；2-2, gas distributing chamber；2-3, air inlet pipe.
Specific embodiment
Specifically describing the preferred embodiment of the present invention with reference to the accompanying drawing, wherein attached drawing constitutes present invention a part, and
Together with embodiments of the present invention for illustrating the principle of the present invention, it is not intended to limit the scope of the present invention.
A specific embodiment of the invention, discloses a kind of circular seam type bottom blowing gas-feeding brick, as shown in Figure 1-3, include master
Body 1 and gas passage 2, gas passage 2 include that circular seam type escape pipe 2-1, gas distributing chamber 2-2 and air inlet pipe 2-3, circular seam type go out
Tracheae 2-1 includes central tube 2-1-1, outer layer sleeve 2-1-2 and circumferential weld 2-1-3.
Being blown into for bottom blown gas in the prior art, under conditions of pressure is certain, discharge area determines gas stream
Amount, in order to reach certain flow, needs certain discharge area, generally uses straight pipe in the prior art, and use cranium
Control pressure carrys out adjusting gas flow, but straight pipe has two, first is that the pressure loss compares when diameter is smaller
Greatly, the increase of Bottom Blowing Gas Flow Rate is limited；Second is that air demand is too big when diameter is bigger, lead to the adjustable extent of flow
It reduces.In addition, diameter, which becomes larger, means that bore is big, the risk of molten steel leakage or reverse irrigation will increase.
Compared with prior art, the circular seam type bottom blowing gas-feeding brick of the present embodiment be suitable for converter, electric furnace, it is various have bottom blowing
The refining furnace of Gas Stirring function is overcome by the way that specific circumferential weld parameter and circular seam type escape pipe quantity, arrangement is arranged
The excessive easy erosion of refractory of bottom blowing flow or the shortcomings that pressure loss in piping excessive easy blocking in the prior art, realizes bottom
It is adjusted in blowing is a wide range of, realizes that bottom blown gas stream stock dissipates while improving bottom blowing gas tolerance, and then reduce molten bath
Vacuum degree promotes molten bath slag-melt equilibration, and finally realizes bottom blowing efficient and long life.
Specifically, the circular seam type escape pipe 2-1 of the present embodiment includes central tube 2-1-1, outer layer sleeve 2-1-2 and circumferential weld
2-1-3 can reduce the risk of molten steel leakage or reverse irrigation while guaranteeing bottom blowing gas amount, and increase by above-mentioned design
The adjustable range of big bottom blowing air demand.
Middle ring slit width degree of the present invention refers to the semidiameter of circumferential weld inner ring and outer rings.In view of the width of circumferential weld 2-1-3 is less than
When 0.2mm, the difficulty of processing on the one hand will increase, on the other hand will increase the friction between tube wall, so that gas supply process is rubbed
Mistake of wearing increases, thus more difficult to bottom blowing gas flow is increased.And the width of circumferential weld 2-1-3 be greater than 2mm when, will lead to seam
Gap is excessive, has under the risk of leakage, especially low pressure Supplying gas condition, and risk of leakage is very big, therefore the present embodiment is by circumferential weld 2-
The width of 1-3 is set as 0.2~2mm, the risk of leakage has not only been reduced, but also can reduce the friction between tube wall, to effectively increase
Big bottom blowing gas supply flow.
It should be noted that, although being circumferential weld outlet, under conditions of pressure is certain, flow and supply air line area are at just
Proportionate relationship.Flow is related with the equivalent aera of circumferential weld, and the size of circumferential weld area and the size of central tube have direct relation, therefore
Want the size of strict control central tube.It is found by the innovation research of many years, as the internal diameter > 10mm of central tube, circumferential weld area
Relatively large, gas supply flow is larger, is unfavorable for controlling；And as the internal diameter < 2mm of central tube, circumferential weld area is relatively small same
It is unfavorable for controlling.Therefore, the internal diameter of the present embodiment control centre pipe 2-1-1 is that 2~10mm both can guarantee that gas supply flow can expire
Sufficient use demand, and be conducive to control gas supply flow.
In view of the stability problem of circular seam type escape pipe, the present embodiment select the wall thickness of central tube 2-1-1 for 0.2~
2mm.This is because: circular seam type escape pipe is excessively thin, will lead to circular seam type escape pipe when the wall thickness of central tube 2-1-1 is less than 0.2mm
Stability it is poor, especially under hot conditions, once there is deformation, will affect the air permeability effect in circumferential weld channel；And central tube 2-1-1
Wall thickness be greater than 2mm when, circular seam type escape pipe is blocked up, will lead to circular seam type escape pipe area increase, influence circular seam type escape pipe
Quantity and arrangement.Illustratively, select wall thickness for the central tube 2-1-1 of 1mm.
In view of the length of outer layer sleeve 2-1-2 is generally more than 1m, if wall thickness is less than 0.2mm, one side outer layer jacket
Pipe 2-1-2 is easily-deformable, and stability is poor；Another aspect difficulty of processing is big.And if wall thickness is greater than 2.5mm, circular seam type outlet
The diameter of pipe 2-1 is big, and the ratio that will lead to the specific surface area of circular seam type escape pipe 2-1 and the specific surface area of bottom blowing gas-feeding brick increases
Greatly, so that the corrosion resistance of the bottom blowing gas-feeding brick is poor, safety in utilization is reduced.Therefore, the present embodiment controls outer layer sleeve 2-
The wall thickness of 1-2 is 0.2~2.5mm.
Mode is arranged according to the quantity of circular seam type escape pipe on the same bottom blowing gas-feeding brick to select.Illustratively, more
A circular seam type escape pipe 2-1 is laid are as follows: the ipsilateral endpoint line of circular seam type escape pipe 2-1 constitutes triangle, square, circle, circle
Annular or linear, as shown in Figure 3.Above-mentioned laying mode is conducive to processing, is easy to arrange, convenient for ventilation.
It is worth noting that, the increase of circumferential weld quantity means the increase of vapor permeation area, vapor permeation area is bigger, venting capability
It is stronger, but the increase of vapor permeation area, it will affect the quantity of the ventilative branch of circular seam type bottom blowing in same bottom blowing gas-feeding brick, and then influence
The quantity of circular seam type bottom blowing gas-feeding brick in entire converter arrangement.The quantity of outer layer sleeve 2-1-2 is 1~5 in the present embodiment, preferably
For 2 outer layer sleeve 2-1-2.
In view of the maintenance issues of bottom blowing gas-feeding brick, the spacing L of adjacent circular seam type escape pipe 2-1 is selected as by the present embodiment
Outer diameter (the D of 1~10 times of outermost layer casingN), it may be assumed that L=1~10DN, this is because: each circular seam type escape pipe is blown into molten bath
It is gas at normal temperature, is a kind of cold conditions gas for the molten steel of high temperature or molten iron, being blown into for cold conditions gas can condenses
Effect, it is ventilative in the condensation that outlet bore ends generate disperse, condense iron or scum mixture.If spacing is too small, first is that unfavorable
In processing, second is that interfering with each other between condensate, influence to breathe freely；Because each small condensate connects into big ventilative condensate
The more conducively protection of gas outlet, and cannot be connected if spacing is excessive, between condensate, it is unfavorable between each small condensate
It puts up a bridge and connects.Therefore, the spacing of the adjacent circular seam type escape pipe 2-1 of the present embodiment is 1~10DN。
It should be noted that in the present embodiment, LN-LN-1=0.2~0.5mm, i.e., the thickness ratio of outermost outer layer sleeve
Thickness the thickness 0.2~0.5mm, L of the outer layer sleeve of other layersN-1=LCenter, i.e., the thickness of the outer layer sleeve of other layers is and center
The thickness of pipe is identical.
In view of the thickness of tube wall is related to the stability of circular seam type escape pipe, therefore, not all outer layer in the present embodiment
The thickness of casing is identical as the thickness of central tube, but the thickness of outermost outer layer sleeve is greater than the outer layer sleeve of other layers
The outer thickness of pipe of thickness a bit, above-mentioned design is the stability in order to increase circumferential weld pipe.Illustratively, LN-LN-1=0.2~
0.5mm, this is because: difficulty of processing is big, and stability is also poor when thickness difference is less than 0.2mm；And thickness difference is 0.5mm
Meet strength demand.
And if the thickness of every layer of casing is all larger than the thickness of central tube, it will lead to the straight of circular seam type escape pipe 2-1
Diameter is big, and the ratio that will lead to the specific surface area of circular seam type escape pipe 2-1 and the specific surface area of bottom blowing gas-feeding brick increases, so that
The corrosion resistance of the bottom blowing gas-feeding brick is poor, reduces safety in utilization.And the thickness of the outer layer sleeve of other layers and the thickness of central tube
It is identical to satisfy the use demand.Therefore, L in the present embodimentN-1=LCenter。
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of circular seam type bottom blowing gas-feeding brick, which is characterized in that including main body (1) and gas passage (2), the gas passage
It (2) include circular seam type escape pipe (2-1), gas distributing chamber (2-2) and air inlet pipe (2-3), circular seam type escape pipe (2-1) packet
Include central tube (2-1-1), outer layer sleeve (2-1-2) and circumferential weld (2-1-3).
2. circular seam type bottom blowing gas-feeding brick according to claim 1, which is characterized in that the number of the outer layer sleeve (2-1-2)
Amount be it is multiple, between multiple outer layer sleeves (2-1-2) or between outer layer sleeve (2-1-2) and central tube (2-1-1) described in formation
Circumferential weld (2-1-3).
3. circular seam type bottom blowing gas-feeding brick according to claim 1 or 2, which is characterized in that the width of the circumferential weld (2-1-3)
For 0.2~2mm.
4. circular seam type bottom blowing gas-feeding brick according to claim 1 or 2, which is characterized in that the central tube (2-1-1) it is interior
Diameter is 2~10mm, and wall thickness is 0.2~2mm.
5. circular seam type bottom blowing gas-feeding brick according to claim 4, which is characterized in that the wall of the outer layer sleeve (2-1-2)
Thickness is 0.2~2.5mm.
6. circular seam type bottom blowing gas-feeding brick according to claim 4, which is characterized in that the circular seam type escape pipe (2-1)
Quantity is 1~20.
7. circular seam type bottom blowing gas-feeding brick according to claim 6, which is characterized in that multiple circular seam type escape pipe (2-1) cloth
It is set as one of triangle, square, circle, circular ring shape or linear.
8. circular seam type bottom blowing gas-feeding brick according to claim 1, which is characterized in that the number of the outer layer sleeve (2-1-2)
Amount is equal to the quantity of the circumferential weld (2-1-3).
9. circular seam type bottom blowing gas-feeding brick according to claim 8, which is characterized in that the number of the outer layer sleeve (2-1-2)
Amount is 2~5.
10. circular seam type bottom blowing gas-feeding brick according to claim 8, which is characterized in that adjacent circular seam type escape pipe (2-1)
Spacing is the outer diameter of 1~10 times of outermost layer casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910517535.9A CN110205444B (en) | 2019-06-14 | 2019-06-14 | Circular seam type bottom blowing air supply brick |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910517535.9A CN110205444B (en) | 2019-06-14 | 2019-06-14 | Circular seam type bottom blowing air supply brick |
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| Publication Number | Publication Date |
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| CN110205444A true CN110205444A (en) | 2019-09-06 |
| CN110205444B CN110205444B (en) | 2021-01-05 |
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| CN201910517535.9A Active CN110205444B (en) | 2019-06-14 | 2019-06-14 | Circular seam type bottom blowing air supply brick |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2228213Y (en) * | 1995-08-22 | 1996-05-29 | 首钢总公司 | Bottom-blowing gas supply element for electric arc furnace |
| CN102296146A (en) * | 2011-08-16 | 2011-12-28 | 东北大学 | Metal slit-type ladle bottom blowing powder injection apparatus |
| CN102560009A (en) * | 2012-01-16 | 2012-07-11 | 东北大学 | RH vacuum refining bottom blowing powder injection device |
| CN202571270U (en) * | 2012-04-17 | 2012-12-05 | 马钢(集团)控股有限公司 | Permeable brick for molten iron ladle |
| CN207347601U (en) * | 2017-09-05 | 2018-05-11 | 洛阳轩石高温材料有限公司 | The air brick that the motion state stirring of metal bath in metallurgical furnace can be helically flowed |
-
2019
- 2019-06-14 CN CN201910517535.9A patent/CN110205444B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2228213Y (en) * | 1995-08-22 | 1996-05-29 | 首钢总公司 | Bottom-blowing gas supply element for electric arc furnace |
| CN102296146A (en) * | 2011-08-16 | 2011-12-28 | 东北大学 | Metal slit-type ladle bottom blowing powder injection apparatus |
| CN102560009A (en) * | 2012-01-16 | 2012-07-11 | 东北大学 | RH vacuum refining bottom blowing powder injection device |
| CN202571270U (en) * | 2012-04-17 | 2012-12-05 | 马钢(集团)控股有限公司 | Permeable brick for molten iron ladle |
| CN207347601U (en) * | 2017-09-05 | 2018-05-11 | 洛阳轩石高温材料有限公司 | The air brick that the motion state stirring of metal bath in metallurgical furnace can be helically flowed |
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| CN110205444B (en) | 2021-01-05 |
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