CN213388767U - RH dip pipe structure - Google Patents
RH dip pipe structure Download PDFInfo
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- CN213388767U CN213388767U CN202021451664.7U CN202021451664U CN213388767U CN 213388767 U CN213388767 U CN 213388767U CN 202021451664 U CN202021451664 U CN 202021451664U CN 213388767 U CN213388767 U CN 213388767U
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Abstract
An RH dip pipe structure comprises a magnesium spinel brick, a flowing material, a steel liner and a casting material which are sequentially arranged from inside to outside, wherein a ceramic coating is arranged on the outer surface of the magnesium spinel brick and is in close contact with the flowing material, the thickness of the ceramic coating is 0.1-0.5 mm, the magnesium spinel brick consists of an upper layer of magnesium spinel ring brick and a lower layer of magnesium spinel ring brick, and when the magnesium spinel brick is arranged into 2 layers, the magnesium spinel brick comprises a standard magnesium spinel ring brick and a special magnesium spinel ring brick which are correspondingly arranged from top to bottom; when the magnesium spinel brick is arranged into 3 layers, the magnesium spinel brick comprises two layers of standard magnesium spinel ring bricks which are correspondingly arranged at the upper part and the middle part and a special magnesium spinel ring brick which is arranged at the lower part; the utility model discloses a be provided with ceramic coating on magnesium spinel brick's surface, directly isolated on the one hand from the contact of the internal MgO of flowing material and magnesium spinel brick, on the other hand, nanometer coating structure density is high, and the porosity is extremely low, greatly reduces the oxidation of carbon in the magnesium spinel brick, has kept brick body structural stability.
Description
Technical Field
The utility model relates to a dip pipe structure especially relates to a RH dip pipe structure.
Background
It is known that the RH vacuum cycle degassing refining method was invented and put into production in 1958 by Ruhrstahl (Ruhrstahl) and Heraeus (Heraeus) belonging to the German Tetsen company, and has a wide application in steel making production, especially clean steel production. The refractory material for the RH refining furnace adopts magnesia-chrome bricks with good thermal shock stability and strong slag resistance. However, since the 80 s in the 20 th century, the unfired magnesia spinel brick products gradually replaced magnesia-chrome brick products as the main force of lining materials for RH due to the drive of 'chromium public hazard', chromium resource shortage, energy-saving and consumption-reducing policies and the like.
The RH dip pipe is used as a channel for molten steel circulating smelting, the lining of the RH dip pipe is damaged most seriously, and the RH dip pipe is replaced most frequently, which is a key for limiting the service life of the whole RH furnace. The existing RH dip pipe comprises the following components from inside to outside in sequence: during the production process, the magnesia spinel brick is combined by a binder and dried, an argon blowing pipe is installed, a steel structure is assembled, then a mold is filled, the self-flowing material is poured between the magnesia spinel brick and the steel liner, finally the casting material is poured between the steel liner and the mold, and the finished product is prepared after maintenance and baking. Practice shows that the water content in the self-flowing material is higher (generally 6.5%), the self-flowing material is in direct contact with the magnesia spinel brick, if the self-flowing material is not baked timely or sufficiently before use, the water content seeps into the magnesia spinel brick, and the water content fluctuates along with temperature change, so that MgO hydration in the magnesia spinel brick or the brick body is frozen and cracked, and the service life of the dip pipe is greatly shortened. In addition, because the prior magnesia spinel brick is a carbon-containing product by adopting resin combination, in the using process, the back of the magnesia spinel brick is subjected to carbon oxidation due to abnormal conditions, such as flange weld cracking and the like, so that the material structure is loose, the strength is reduced, the corrosion is abnormal, the magnesia spinel brick is off-line in advance, and steel penetration accidents are seriously caused.
Disclosure of Invention
In order to overcome the defects in the background art, the utility model discloses an RH dip pipe structure.
In order to realize the purpose, the utility model adopts the following technical scheme:
an RH dip pipe structure comprises a magnesium spinel brick, a self-flowing material, a steel liner and a casting material which are sequentially arranged from inside to outside, wherein a ceramic coating is arranged on the outer surface of the magnesium spinel brick, and the ceramic coating is in close contact with the self-flowing material.
In the RH dip pipe structure, the thickness of the ceramic coating is 0.1-0.5 mm.
The RH dip pipe structure is characterized in that the ceramic coating is nano Al2O3Coating and nano Al2O3-TiO2A coating or a TiN coating.
In the RH dip pipe structure, an anchoring piece is arranged between the outer surface of the steel liner and the casting material.
In the RH dip pipe structure, the magnesium spinel brick consists of an upper layer and a lower layer of 2-3 layers of magnesium spinel ring bricks, and when the magnesium spinel brick is arranged into 2 layers, the magnesium spinel brick comprises a standard magnesium spinel ring brick and a special magnesium spinel ring brick which are correspondingly arranged up and down; when the magnesium spinel brick is arranged into 3 layers, the magnesium spinel brick comprises two layers of standard magnesium spinel ring bricks which are correspondingly arranged at the upper part and the middle part and a special-shaped magnesium spinel ring brick which is arranged at the lower part.
Since the technical scheme is used, the utility model discloses following beneficial effect has:
the RH dip pipe structure of the utility model has the advantages that the ceramic coating is arranged on the outer surface of the magnesia spinel brick, on one hand, the contact between the self-flowing material and MgO in the magnesia spinel brick body is directly isolated, the hidden danger that the brick body structure is damaged due to the hydration of MgO, the strength is reduced, and the service life is obviously reduced in the use process is fundamentally eliminated; on the other hand, the nano coating has high structure density and extremely low porosity, blocks a transmission channel of oxygen to the magnesium spinel brick, can greatly reduce the oxidation of carbon in the magnesium spinel brick and keeps the structural stability of the brick body; the utility model discloses simple structure can improve its life greatly.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
in the figure: 1. magnesium spinel brick; 2. self-flowing; 3. a steel liner; 4. pouring a material; 5. a ceramic coating; 6. and (4) an anchoring piece.
Detailed Description
The invention will be explained in more detail by the following examples, which disclose the invention and are intended to protect all technical improvements within the scope of the invention.
The RH dip pipe structure described in connection with fig. 1 includes a magnesium spinel brick 1, a self-flowing material 2, a steel liner 3 and a castable 4, which are sequentially disposed from inside to outside, wherein a ceramic coating 5 is disposed on an outer surface of the magnesium spinel brick 1, and the ceramic coating 5 is in close contact with the self-flowing material 2.
In the RH dip pipe structure, the thickness of the ceramic coating is 0.1-0.5 mm.
The RH dip pipe structure is characterized in that the ceramic coating is nano Al2O3Coating and nano Al2O3-TiO2A coating or a TiN coating.
In the RH dip pipe structure, an anchoring piece 6 is arranged between the outer surface of the steel liner 3 and the casting material 4.
In the RH dip pipe structure, the magnesium spinel brick 1 consists of an upper layer and a lower layer of 2-3 layers of magnesium spinel ring bricks, and when the magnesium spinel brick 1 is arranged into 2 layers, the magnesium spinel brick comprises a standard magnesium spinel ring brick and a special magnesium spinel ring brick which are correspondingly arranged up and down; when the magnesium spinel brick 1 is arranged into 3 layers, the magnesium spinel brick comprises two layers of standard magnesium spinel ring bricks which are correspondingly arranged at the upper part and the middle part and special-shaped magnesium spinel ring bricks which are correspondingly arranged at the lower part.
Implement the RH dip pipe structure, magnesium spinel brick 1 comprises from top to bottom 2-3 layers of magnesium spinel ring brick, ceramic coating 5 spraying is on the surface of the magnesium spinel brick 1 with flowing material in close contact with certainly, ceramic coating 5 is nanometer Al2O3Coating and nano Al2O3-TiO2The thickness of the ceramic coating 5 is 0.1-0.5 mm; and (3) finishing spraying, drying in a drying kiln at 110 ℃, and sequentially carrying out procedures of argon blowing pipe installation, steel structure installation, mold installation, self-flowing material and pouring operation of pouring materials and the like after drying.
The part of the utility model not detailed is prior art.
The embodiments selected for the purpose of disclosing the invention, are presently considered to be suitable, it being understood, however, that the invention is intended to cover all variations and modifications of the embodiments, which fall within the scope of the concept and the utility model.
Claims (3)
1. The utility model provides a RH dip pipe structure, includes magnesium spinel brick, flowing material, steel courage and the pouring material that sets gradually from inside to outside, characterized by: the magnesium spinel brick is characterized in that a ceramic coating is arranged on the outer surface of the magnesium spinel brick, the ceramic coating is in close contact with a self-flowing material, the thickness of the ceramic coating is 0.1-0.5 mm, the magnesium spinel brick is composed of an upper magnesium spinel ring brick and a lower magnesium spinel ring brick which are 2 layers, and when the magnesium spinel brick is arranged into 2 layers, the magnesium spinel brick comprises a standard magnesium spinel ring brick and a special magnesium spinel ring brick which are correspondingly arranged up and down; when the magnesium spinel brick is arranged into 3 layers, the magnesium spinel brick comprises two layers of standard magnesium spinel ring bricks which are correspondingly arranged at the upper part and the middle part and a special-shaped magnesium spinel ring brick which is arranged at the lower part.
2. The RH dip tube structure of claim 1, wherein: the ceramic coating is nano Al2O3Coating and nano Al2O3-TiO2A coating or a TiN coating.
3. The RH dip tube structure of claim 1, wherein: an anchoring piece is arranged between the outer surface of the steel liner and the casting material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021451664.7U CN213388767U (en) | 2020-07-22 | 2020-07-22 | RH dip pipe structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021451664.7U CN213388767U (en) | 2020-07-22 | 2020-07-22 | RH dip pipe structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213388767U true CN213388767U (en) | 2021-06-08 |
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ID=76201314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021451664.7U Active CN213388767U (en) | 2020-07-22 | 2020-07-22 | RH dip pipe structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213388767U (en) |
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2020
- 2020-07-22 CN CN202021451664.7U patent/CN213388767U/en active Active
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