CN214327770U - Belly pipe device - Google Patents
Belly pipe device Download PDFInfo
- Publication number
- CN214327770U CN214327770U CN202120484188.7U CN202120484188U CN214327770U CN 214327770 U CN214327770 U CN 214327770U CN 202120484188 U CN202120484188 U CN 202120484188U CN 214327770 U CN214327770 U CN 214327770U
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- Prior art keywords
- hot air
- pipe
- liner
- hot
- blast
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- 210000001015 abdomen Anatomy 0.000 title claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 20
- 239000010959 steel Substances 0.000 claims abstract description 20
- 230000000694 effects Effects 0.000 claims description 9
- 239000011819 refractory material Substances 0.000 claims description 8
- 239000011449 brick Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 238000009991 scouring Methods 0.000 abstract description 6
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000003723 Smelting Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000005338 heat storage Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The utility model relates to a technical field that blast furnace smelted discloses a belly pipe device, including hollow steel casing (1) that is equipped with inlet end (11) and gives vent to anger end (12), still include hot-blast bushing pipe (3) fired by design resistant firebrick, hot-blast bushing pipe (3) equipment in the inner chamber of steel casing (1), hot-blast bushing pipe (3) intercommunication inlet end (11) reach give vent to anger end (12 hot-blast bushing pipe (3) with pouring amorphous castable (2) between steel casing (1). The utility model has the advantages of strong anti-scouring capability, high safety, long service life increased to 2-3 years from original 8-12 months, reduced surface temperature by 50-70 ℃, reduced external loss and energy conservation and environmental protection.
Description
Technical Field
The utility model relates to a technical field of blast furnace smelting especially relates to a belly pipe device.
Background
In the existing metal smelting technology, oxygen-enriched air blowing is an important means for improving the smelting intensity of a blast furnace, and a large amount of high-temperature hot air is led into a hearth of the blast furnace from a hot air liner pipe through an air supply device. At present, an air supply device used in a blast furnace system consists of an air supply device middle section, an elbow direct-blowing part and the like. In recent years, along with the improvement of the smelting strength of the blast furnace, the service life of a belly pipe device directly connected with the blast furnace is short, generally about 8-12 months, and the problems of high temperature, burnthrough, high energy consumption and the like of the belly pipe device are caused by the problems of cracking, material falling and the like of the inner hot air channel refractory material under the long-term scouring of the hot air of the blast furnace, so that the belly pipe device which is resistant to scouring, high in safety, energy-saving, environment-friendly and long in service life is urgently needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a belly pipe device, its hot-blast bushing pipe's scour resistance ability is strong, and the security is high, energy-concerving and environment-protective and long service life.
The utility model discloses a technical scheme through following two aspects realizes:
the first scheme provides a belly pipe device, which comprises a hollow steel shell and a hot air liner pipe, wherein the hollow steel shell is provided with an air inlet end and an air outlet end, the hot air liner pipe is fired by shaped refractory bricks, the hot air liner pipe is assembled in an inner cavity of the steel shell and is communicated with the air inlet end and the air outlet end, and an unshaped castable is poured between the hot air liner pipe and the steel shell.
Preferably, the castable is a refractory having a heat insulating effect. The refractory material with the heat insulation function generally refers to a refractory material, and mainly has the main functions of reducing the heat dissipation loss of the hot air liner pipe, reducing the heat storage capacity of the hot air liner pipe and obtaining the optimal energy-saving effect.
Preferably, the hot air liner pipe is a tapered pipe, and the large-diameter end of the hot air liner pipe faces the air inlet end.
Specifically, the thickness of the single side of the hot air liner pipe at the air inlet end is 50 mm, and the thickness of the single side of the hot air liner pipe at the air outlet end is 20 mm.
Specifically, the length of the hot air liner tube is 1200 mm-1400 mm.
Preferably, the hot air liner tube is a shaped refractory brick structure fired at 1350 ℃.
The second scheme provides a belly pipe device, which is a structure which is formed by a steel shell, an unshaped castable and a hot air liner pipe from outside to inside in sequence and is integrally baked, and the unshaped castable is fixed to form one layer structure to connect the steel shell and the hot air liner pipe.
Specifically, the baking temperature was 540 ℃.
The beneficial effects are that: compared with the prior art, the utility model discloses an antiscour ability is strong, and the security is high, and long service life increases to 2-3 years from original 8-12 months, and apparent temperature reduces 50-70 ℃, reduces the effect that external loss reaches energy-concerving and environment-protective.
Drawings
The following detailed description of embodiments of the invention is provided in conjunction with the accompanying drawings, in which:
FIG. 1 is a preferred embodiment of the present invention;
wherein the reference numerals are:
1. a steel shell; 11. an air inlet end; 12. an air outlet end; 2. an unshaped castable; 3. a hot air liner tube.
Detailed Description
As shown in figure 1, the belly pipe device is an integral structure consisting of a steel shell 1, an indefinite-shaped castable 2 and a shaped refractory brick from outside to inside in sequence. Wherein, the steel shell 1 is provided with a hollow structure with an air inlet end 11 and an air outlet end 12, and is preferably a tubular structure generally; the belly pipe device also comprises a hot air liner pipe 3 fired by the shaped refractory bricks, the hot air liner pipe 3 is assembled in the inner cavity of the steel shell 1, two ends of the hot air liner pipe 3 are respectively communicated with the air inlet end 11 and the air outlet end 12, and an unshaped castable 2 is poured between the hot air liner pipe 3 and the steel shell 1. The hot air liner tube 3 is formed by firing the shaped refractory bricks, so that the effects of high temperature resistance and strong scouring resistance can be achieved, the problems that materials fall off and cracks occur too early under the long-term scouring of blast furnace hot air of the internal hot air channel refractory material at present are solved, the potential safety hazards of high temperature, burnthrough, energy consumption and the like of the belly pipe are caused, the surface temperature is reduced by 50-70 ℃, the external loss is reduced, and the effects of energy conservation and environmental protection are achieved.
In a preferred embodiment, the castable refractory 2 is a refractory material having a heat insulating effect. The refractory material with the heat insulation function generally refers to a refractory material, and mainly has the main functions of reducing the heat dissipation loss of the hot air liner tube 3, reducing the heat storage capacity of the hot air liner tube 3 and obtaining the optimal energy-saving effect. In particular, a heat insulating material having a low heat conductivity has a high heat insulating effect.
In a second preferred embodiment, the hot air liner tube 3 is a tapered tube, the large diameter end of the hot air liner tube 3 faces the air inlet end 11, and the small diameter end of the hot air liner tube 3 faces the air outlet end 12, so that the flow rate of air flow introduced into the blast furnace hearth is increased under the condition of oxygen-enriched air blast, the material and gas mixing is more uniform, and the combustion rate of the material is increased.
The third preferred embodiment is different from the second preferred embodiment in that the thickness of the single side of the hot air liner pipe 3 at the air inlet end 11 is 50 mm, and the thickness of the single side of the hot air liner pipe 3 at the air outlet end 12 is 20 mm, so as to better adapt to the blast furnace hearth, and increase the flow velocity of the air flow as much as possible while satisfying the air flow rate, so as to increase the combustion rate of the material.
In the fourth preferred embodiment, the length of the hot air liner 3 is 1200 mm-1400 mm, which is better adapted to the blast furnace hearth, too short results in insufficient air flow acceleration, and too long results in difficult firing and forming, and increases the cost.
In the fifth preferred embodiment, the hot air liner 3 is a shaped firebrick structure fired at 1350 ℃, and the hot air liner 3 fired at the temperature can obtain the best erosion resistance, so that the service life of the belly pipe device is prolonged to 2-3 years.
In a sixth preferred embodiment, the belly pipe device is an integral structure formed by a steel shell 1, an indefinite-form castable 2 and a shaped refractory brick from outside to inside in sequence, the indefinite-form castable 2 is fixed to form one layer structure, the steel shell 1 and the hot air liner pipe 3 are connected, and the integral baking forming is carried out, so that the anti-scouring capability is improved. Specifically, the baking temperature was 540 ℃.
The above embodiments are not limited to the technical solutions of the embodiments themselves, and the embodiments may be combined with each other into a new embodiment. The above description is only a preferred and practical embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent variations made by using the contents of the specification and the drawings are included in the scope of the present invention.
Claims (7)
1. A belly pipe device comprises a hollow steel shell (1) provided with an air inlet end (11) and an air outlet end (12), and is characterized by further comprising a hot air liner pipe (3) made of shaped refractory bricks, wherein the hot air liner pipe (3) is assembled in an inner cavity of the steel shell (1), the hot air liner pipe (3) is communicated with the air inlet end (11) and the air outlet end (12), and an unshaped castable (2) is poured between the hot air liner pipe (3) and the steel shell (1).
2. A belly pipe arrangement according to claim 1, characterized in that said amorphous castable material (2) is a refractory material with a heat insulating effect.
3. Belly pipe arrangement according to claim 1, characterized in that said hot air liner (3) is a conical tube, the large diameter end of said hot air liner (3) facing said air intake end (11).
4. A belly pipe arrangement according to claim 3, characterized in that said hot air liner (3) has a single side thickness of 50 mm at said inlet end (11) and said hot air liner (3) has a single side thickness of 20 mm at said outlet end (12).
5. Belly pipe device according to claim 3 or 4, characterized in that the length of said hot air liner (3) is 1200-1400 mm.
6. Belly pipe arrangement according to claim 1, characterized in that said hot air liner (3) is of a shaped firebrick structure fired at 1350 ℃.
7. A belly pipe device is characterized by comprising a steel shell (1), an unshaped castable (2) and a hot air liner pipe (3) from outside to inside in sequence, and being integrally baked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120484188.7U CN214327770U (en) | 2021-03-05 | 2021-03-05 | Belly pipe device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120484188.7U CN214327770U (en) | 2021-03-05 | 2021-03-05 | Belly pipe device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214327770U true CN214327770U (en) | 2021-10-01 |
Family
ID=77888020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120484188.7U Active CN214327770U (en) | 2021-03-05 | 2021-03-05 | Belly pipe device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214327770U (en) |
-
2021
- 2021-03-05 CN CN202120484188.7U patent/CN214327770U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Direct blow pipe device Effective date of registration: 20231130 Granted publication date: 20211001 Pledgee: China Merchants Bank Limited by Share Ltd. Tangshan branch Pledgor: TANGSHAN JINSHAN TENGYU SCIENCE & TECHNOLOGY CO.,LTD. Registration number: Y2023980068718 |