CN118006858A - Vault structure of hot blast stove - Google Patents
Vault structure of hot blast stove Download PDFInfo
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- CN118006858A CN118006858A CN202410319202.6A CN202410319202A CN118006858A CN 118006858 A CN118006858 A CN 118006858A CN 202410319202 A CN202410319202 A CN 202410319202A CN 118006858 A CN118006858 A CN 118006858A
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- 239000010959 steel Substances 0.000 claims abstract description 66
- 239000002253 acid Substances 0.000 claims abstract description 65
- 238000005507 spraying Methods 0.000 claims abstract description 65
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 58
- 239000010935 stainless steel Substances 0.000 claims abstract description 58
- 238000009413 insulation Methods 0.000 claims abstract description 11
- 239000011449 brick Substances 0.000 claims description 43
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 36
- 239000000377 silicon dioxide Substances 0.000 claims description 17
- 239000000919 ceramic Substances 0.000 claims description 14
- 239000004927 clay Substances 0.000 claims description 14
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- 230000007797 corrosion Effects 0.000 abstract description 19
- 238000005260 corrosion Methods 0.000 abstract description 19
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- 238000002485 combustion reaction Methods 0.000 description 22
- 230000035882 stress Effects 0.000 description 7
- 230000015556 catabolic process Effects 0.000 description 5
- 238000006731 degradation reaction Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
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- 230000007774 longterm Effects 0.000 description 3
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- 239000011248 coating agent Substances 0.000 description 2
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- 229910052742 iron Inorganic materials 0.000 description 2
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- 229910052710 silicon Inorganic materials 0.000 description 2
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- 229910020489 SiO3 Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
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- 238000003475 lamination Methods 0.000 description 1
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- 239000003973 paint Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
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- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The application discloses a vault structure of a hot blast stove, and belongs to the technical field of hot blast stoves. The vault structure of the hot blast stove provided by the application comprises a refractory heat insulation layer, a stainless steel sheet layer and a vault steel shell which are sequentially arranged from inside to outside, wherein the inner wall of the vault steel shell is provided with an acid-resistant spraying layer. The stainless steel sheet layer is used for isolating most NOx from being in contact with the vault steel shell, so that the problem of corrosion cracking among vault steel shell crystals caused by contact of the NOx and the vault steel shell is solved, meanwhile, the problems of high temperature and the like of the vault steel shell caused by crack and gas cross generated by masonry caused by alternating stress generated when the hot blast stove supplies air and fires alternately can be solved, and the corrosion of the NOx to the vault steel shell is further avoided by the contact of the NOx and the vault steel shell through the arrangement of the acid-resistant spraying layer. The application is beneficial to prolonging the service life of the vault steel shell and ensuring the continuous and stable operation of the hot blast stove.
Description
Technical Field
The application belongs to the technical field of hot blast stoves, and particularly relates to a vault structure of a hot blast stove.
Background
Shoudu Iron and Steel Co shares 2 of blast furnace hot blast stove (effective volume 2650m 3) are put into use in 1 month and 4 days of 2007, 3 internal combustion type hot blast stoves are provided, 2 top combustion type preheating stoves are used for preheating combustion air at low temperature, a plate heat exchanger is used for preheating blast furnace gas at low temperature, the design wind temperature of the No. 2 blast furnace hot blast stove is 1250 ℃, the maximum combustion amount is 143020m 3/h, and a hot blast stove system adopts a two-combustion one-feeding working system for blast furnace air feeding.
The running of the No. 2 blast furnace hot blast stove is nearly 16 years, and the resistance loss of the hot blast stove is gradually increased along with the extension of the running time of the hot blast stove, so that the problems of difficult combustion and low air temperature level occur. Before 2022 years, most of the crack and wind-escaping parts of the vault steel shell of the hot blast stove are weld joints and sand holes. In 2022, the steel shell body is mainly cracked, the length and the severity of the cracking are increased, the vault steel shell is in a rapid degradation trend, and the cracked part reaches the fatigue limit of the steel shell, so that the safety production of the hot blast stove is seriously threatened.
As described above, in the related art, there is a technical problem in that the vault steel shell of the hot blast stove has a rapid deterioration tendency, resulting in a short service life of the hot blast stove.
Disclosure of Invention
The application aims to solve the technical problem that the vault steel casing of the hot blast stove in the related art has a rapid degradation trend at least to a certain extent. To this end, the application provides a stove dome structure.
The embodiment of the application provides a vault structure of a hot blast stove, which comprises a refractory heat insulation layer, a stainless steel sheet layer and a vault steel shell which are sequentially arranged from inside to outside, wherein an acid-resistant spraying layer is arranged on the inner wall of the vault steel shell.
In some embodiments, the acid-resistant spray coating comprises an ACT-250 acid-resistant spray coating and a MIX-687 acid-resistant spray coating, the ACT-250 acid-resistant spray coating being sprayed on the inner wall of the dome steel shell, the MIX-687 acid-resistant spray coating being sprayed on the ACT-250 acid-resistant spray coating.
In some embodiments, the ACT-250 acid resistant spray coating is an ACT-250 acid resistant spray coating having a viscosity of 100KU-150KU (25 ℃) and a bulk density of 1.15g/cm 3-1.35g/cm3 (25 ℃).
In some embodiments, the spray coating of the MIX-687 acid-resistant spray coating is MIX-687 acid-resistant spray coating, wherein the chemical components of the MIX-687 acid-resistant spray coating are Al 2O3 -45%, caO-0.5%, refractoriness-1540 ℃ and compressive strength-12 Mpa.
In some embodiments, the acid resistant spray coating has a thickness of 80-100mm.
In some embodiments, the stainless steel plate layer comprises a plurality of stainless steel plates, wherein two adjacent stainless steel plates are partially overlapped, and the stainless steel plates are fixedly connected to the acid-resistant spraying layer.
In some embodiments, two adjacent stainless steel plates are stacked more than 300mm in the transverse direction and more than 400mm in the longitudinal direction; the stainless steel plate is fixed on the acid-resistant spraying layer through a connecting piece.
In some embodiments, the stainless steel plate is S31008.
In some embodiments, the refractory insulation layer comprises a ceramic fiber layer and a brick layer arranged in sequence, the ceramic fiber layer being positioned between the stainless steel plate layer and the brick layer.
In some embodiments, the brick layer comprises a lightweight clay brick layer, a lightweight silica brick layer, and a heavy silica brick layer disposed in sequence, the lightweight clay brick layer being located between the ceramic fiber layer and the lightweight silica brick layer.
The invention has at least the following beneficial effects:
The vault structure of the hot blast stove provided by the invention comprises a refractory heat insulation layer, a stainless steel sheet layer and a vault steel shell which are sequentially arranged from inside to outside, wherein the inner wall of the vault steel shell is provided with an acid-resistant spraying layer. The stainless steel sheet layer is used for isolating most NOx from being in contact with the vault steel shell, so that the problem of corrosion cracking among vault steel shell crystals caused by contact of the NOx and the vault steel shell is solved, meanwhile, the problems of high temperature and the like of the vault steel shell caused by crack and gas cross generated by masonry caused by alternating stress generated when the hot blast stove supplies air and fires alternately can be solved, and the corrosion of the NOx to the vault steel shell is further avoided by the contact of the NOx and the vault steel shell through the arrangement of the acid-resistant spraying layer. The invention is beneficial to prolonging the service life of the vault steel shell and ensuring the continuous and stable operation of the hot blast stove.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 shows a schematic structural view of a furnace dome structure in accordance with one or more embodiments of the present invention.
Reference numerals: 100-a hot blast stove vault structure, 110-a refractory heat preservation layer, 111-a ceramic fiber layer, 112-a light clay brick layer, 113-a light silicon brick layer, 114-a heavy silicon brick layer, 120-a stainless steel plate layer, 130-an acid-resistant spraying layer and 140-a vault steel shell.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all the directional indicators in the embodiments of the present invention are only used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture, and if the specific posture is changed, the directional indicators are correspondingly changed.
In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
Shoudu Iron and Steel Co shares 2 of blast furnace hot blast stove (effective volume 2650m 3) is put into use in 1 month and 4 days of 2007, 3 internal combustion type hot blast stoves are equipped, 2 top combustion type preheating stoves are used for preheating combustion air at low temperature, a plate heat exchanger is used for preheating blast furnace gas at low temperature, 2 number of blast furnace hot blast stoves are used for designing air temperature 1250 ℃, maximum combustion amount is designed 143020m3/h, and a hot blast stove system adopts a two-combustion one-feeding working system for blast furnace air feeding.
The running of the No. 2 blast furnace hot blast stove is nearly 16 years, and the resistance loss of the hot blast stove is gradually increased along with the extension of the running time of the hot blast stove, so that the problems of difficult combustion and low air temperature level occur. Before 2022 years, the cracking and air leakage parts of the steel shell of the vault of the hot air furnace are mostly weld joints and sand holes. In 2022, the steel shell body is mainly cracked, the length and the severity of the cracking are increased, the vault steel shell is in a rapid degradation trend, and the cracked part reaches the fatigue limit of the steel shell, so that the safety production of the hot blast stove is seriously threatened.
As described above, in the related art, there is a technical problem in that the dome steel shell of the hot blast stove has a rapid deterioration tendency. The embodiment of the application provides a vault structure of a hot blast stove, which at least can solve the technical problem that the vault steel shell has a rapid degradation trend to a certain extent.
The application is described below with reference to specific embodiments in conjunction with the accompanying drawings:
The applicant of the present application studied to find: when the temperature of the vault of the hot blast stove reaches 1300-1450 ℃, a large amount of NOx gas is generated by combustion of the hot blast stove, the temperature of the outer part of the vault steel shell is between 70-120 ℃, the temperature of the corresponding inner vault steel shell is between 80-140 ℃, the NOx gas is extremely easy to combine with moisture in air to condense into liquid at the temperature, the liquid adheres to the inner wall of the vault steel shell, so that the vault steel shell body and welding seams of a vault high-temperature area are corroded, and meanwhile, when the hot blast stove is combusted, cl - components are contained in gas, so that the vault steel shell of the hot blast stove is delayed to be damaged under the combined action of long-term corrosive medium and tensile stress (including residual stress and working stress), namely Stress Corrosion Crack (SCC), and further the vault steel shell degradation is further aggravated.
Based on the above research, the embodiment of the application provides a hot blast stove vault structure 100, and the hot blast stove vault structure 100 provided by the embodiment of the application can isolate NOx from contacting with a vault steel shell to a certain extent, so that corrosion of the vault steel shell by the NOx is reduced.
It should be noted that, according to the different arrangement forms of the combustion chamber and the regenerator of the hot blast stove, the hot blast stove can be divided into three basic structural forms: internal combustion type hot blast stove, external combustion type hot blast stove and top combustion type hot blast stove. The shape of the dome of these three structural forms of stove varies and is known to the person skilled in the art. The hot blast stove vault structure provided by the application can be applied to the hot blast stove vault of any structural form, and is not limited in the application.
The vault structure 100 of the hot blast stove comprises a fireproof heat insulation layer 110, a stainless steel plate layer 120 and a vault steel shell 140 which are sequentially arranged from inside to outside, wherein an acid-resistant spraying layer 130 is arranged on the inner wall of the vault steel shell 140.
When the vault of the hot blast stove is installed on the hot blast stove for use, the refractory insulation layer 110 is positioned inside the hot blast stove and bears the highest temperature, and the stainless steel plate layer 120, the acid-resistant spraying layer 130 and the vault steel shell 140 are arranged outwards in sequence.
The main function of the refractory insulating layer 110 is to insulate the fire, reduce the heat loss in the combustion chamber of the hot blast stove, and improve the combustion efficiency. The temperature in the combustion chamber is high, and the refractory insulating layer 110 is easy to crack during long-term use of the hot blast stove vault, so that the phenomenon of high-temperature gas passing through the crack strings occurs.
According to the application, the stainless steel sheet layer 120 is arranged between the vault steel shell 140 and the fireproof heat-insulating layer 110, and NOx can be effectively isolated through the arrangement of the stainless steel sheet layer 120, so that the corrosion of the vault steel shell 140 caused by the fact that the NOx and water are combined and condensed into liquid to be attached to the vault steel shell 140 is avoided to a certain extent. The stainless steel plate layer 120 is made of stainless steel, has the characteristics of stainless and corrosion resistance, and adopts the material of the stainless steel, so that corrosion of the stainless steel plate layer 120 by liquid formed by combining and condensing NOx and moisture can be reduced.
The acid-resistant spraying layer 130 is arranged on the inner wall of the arch steel shell 140, and the contact between NOx and the arch steel shell 140 is further isolated through the arrangement of the acid-resistant spraying layer 130, so that the corrosion of the arch steel shell 140 by the NOx is further avoided.
Under the action of the stainless steel plate layer 120, the stainless steel plate layer 120 can isolate more than ninety five percent of NOx matters, and the auxiliary acid-resistant spraying layer 130 can completely isolate the corrosion of the NOx matters to the arch top steel shell 140.
The corrosion of NOx to the arch top steel shell 140 is effectively avoided by the combined action of the stainless steel plate layer 120 and the acid-resistant spraying layer 130, and the problem of intergranular corrosion cracking of the arch top steel shell 140 is avoided to a certain extent. Meanwhile, due to the isolation effect of the stainless steel plate layer 120 and the acid-resistant spraying layer 130, the problem that the temperature of the vault steel shell 140 is high due to crack and gas leakage of a masonry caused by alternating stress generated when the hot blast stove supplies air and burns fire alternately can be solved to a certain extent. The invention is beneficial to prolonging the service life of the vault steel shell 140, further ensuring the service life of the vault of the hot blast stove and ensuring the continuous and stable operation of the hot blast stove.
In some embodiments, the acid resistant spray coating 130 includes an ACT-250 acid resistant spray coating and a MIX-687 acid resistant spray coating, the ACT-250 acid resistant spray coating being sprayed on the inner wall of the dome steel shell 140, the MIX-687 acid resistant spray coating being sprayed on the ACT-250 acid resistant spray coating.
That is, in the spraying, the ACT-250 acid-resistant spray coating is sprayed on the dome steel shell 140, the ACT-250 acid-resistant spray coating is formed after the ACT-250 acid-resistant spray coating is dried, and then the MIX-687 acid-resistant spray coating is sprayed on the ACT-250 acid-resistant spray coating, and the MIX-687 acid-resistant spray coating is formed after the drying. The corrosion resistance of the dome steel shell 140 is further improved by the arrangement of two acid-resistant spray coatings.
A plurality of anchors may be fixedly disposed at intervals on the inner wall of the dome steel shell 140 before the acid-resistant spray coating is sprayed to ensure firm adhesion of the acid-resistant spray coating 130 to the dome steel shell 140.
To ensure the corrosion resistance of the acid-resistant spray coating 130, in some embodiments, the viscosity of the MIX-687 acid-resistant spray coating is 100KU-150KU (25 ℃) and the bulk density is 1.15g/cm 3-1.35g/cm3 (25 ℃); in some embodiments, the chemical components of the MIX-687 acid-resistant spray paint are more than or equal to 45 percent of Al 2O3, less than or equal to 0.5 percent of CaO, more than or equal to 1540 ℃ of refractoriness and more than or equal to 12Mpa of compressive strength.
In some embodiments, the acid resistant sprayed coating 130 has a thickness of 80-100mm to ensure the corrosion resistance of the acid resistant sprayed coating 130. In some embodiments, the acid resistant spray coating 130 has a thickness of 80mm.
The hot blast stove dome is of a larger size and irregular shape, and in some embodiments, the stainless steel plate layer 120 comprises a plurality of stainless steel plates, and the adjacent two stainless steel plates are partially stacked, and the stainless steel plates are fixedly connected to the acid-resistant spray coating 130.
The arrangement of a plurality of stainless steel plates facilitates the processing and forming of the stainless steel plate layer 120. The partial lamination arrangement between two adjacent stainless steel plates means that one of the two adjacent stainless steel plates is pressed above the other stainless steel plate to form partial overlapping, so that the design is beneficial to reducing gaps between the two adjacent stainless steel plates and improving the effect of the stainless steel plate layer 120 for isolating NOx.
In some embodiments, the stainless steel plates have a length of 2000mm, a width of 1100mm, and a thickness of 0.4mm, and two adjacent stainless steel plates are stacked laterally by more than 300mm and stacked longitudinally by more than 400mm to reduce the gap between the two adjacent stainless steel plates.
When the stainless steel plate is laid to interfere with the hot air outlet, the thermocouple hole, or the like, the stainless steel plate should be cut and processed so as to avoid the orifice position. The stainless steel plate may be laid in synchronization with the laying of the refractory insulating layer 110.
In some embodiments, the stainless steel plate is secured to the acid-resistant spray coating 130 by a connector. The attachment members may be screws or the like, and in some embodiments are secured to the acid spray coating 130 by anchors, with a spacing of 80mm between adjacent anchors.
The stainless steel plate is made of various materials, and in some embodiments, the stainless steel plate is made of S31008, and the S31008 stainless steel belongs to austenitic stainless steel and has excellent high-temperature strength, oxidation resistance and corrosion resistance.
In some embodiments, the refractory insulation layer 110 includes a ceramic fiber layer 111 and a brick layer disposed in sequence, the ceramic fiber layer 111 being positioned between the stainless steel plate layer 120 and the brick layer. The chemical composition of the ceramic fiber layer 111 is Al 2O3≥47％,Al2O3+SiO3 -99%, the long-term working temperature is 1100 ℃, and the ceramic fiber layer 111 can be formed by paving a plurality of ceramic fiber plates. The ceramic fiber layer 111 is used for heat insulation and preservation, and simultaneously absorbs the expansion amount of the brick layer.
In some embodiments, the brick layers include a lightweight clay brick layer 112, a lightweight silica brick layer 113, and a heavy silica brick layer 114, disposed in that order, the lightweight clay brick layer 112 being located between the ceramic fiber layer 111 and the lightweight silica brick layer 113.
The light clay brick layer 112 is formed by paving a plurality of light clay bricks, and the light clay bricks have good heat insulation performance and thermal shock resistance, can bear high temperature change in the hot blast stove, and have certain corrosion resistance.
The light silica brick layer 113 is formed by paving a plurality of light silica bricks, is positioned on the inner side of the light clay brick layer, has higher refractoriness and thermal shock resistance, and can bear higher temperature and pressure change. In addition, the light silica bricks have better permeation resistance, and can prevent gas and the like in the hot blast stove from permeating into the light clay bricks.
The heavy silica brick layer 114 is located at the innermost layer, and the heavy silica brick layer 114 is formed by paving a plurality of heavy silica bricks, so that the heavy silica bricks have higher density and strength, can bear larger mechanical stress and thermal stress, can play a role in protecting the inside light clay bricks and the light silica bricks, and prevent corrosion and damage of external environment.
In some embodiments, to increase the efficiency of the stove dome machining, the laying of the stainless steel plate may be synchronized with the laying of the lightweight clay bricks.
In some embodiments, to control the dome temperature during combustion of the stove to be high, which is prone to the generation of NOx, the dome temperature during combustion of the stove is controlled below 1370 ℃, which helps to reduce NOx generation.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.
In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present application.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the application, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. The utility model provides a hot-blast furnace vault structure, its characterized in that includes refractory insulation layer (110), stainless steel sheet layer (120) and vault steel casing (140) that set gradually from inside to outside, vault steel casing (140) inner wall is provided with acid-proof spraying layer (130).
2. The stove dome structure of claim 1 wherein said acid resistant spray coating (130) comprises an ACT-250 acid resistant spray coating and a MIX-687 acid resistant spray coating, said ACT-250 acid resistant spray coating being sprayed onto the inner wall of said dome steel shell (140), said MIX-687 acid resistant spray coating being sprayed onto said ACT-250 acid resistant spray coating (130).
3. The stove dome structure of claim 2 wherein the acid-resistant ACT-250 spray coating is an acid-resistant ACT-250 spray coating having a viscosity of 100KU-150KU (25 ℃) and a bulk density of 1.15g/cm 3-1.35g/cm3 (25 ℃).
4. The hot blast stove vault structure according to claim 2, characterized in that the spray coating of the MIX-687 acid-resistant spray coating is MIX-687 acid-resistant spray coating, and the chemical composition of the MIX-687 acid-resistant spray coating is Al 2O3 -45%, caO-0.5%, refractoriness-1540 ℃, and compressive strength-12 Mpa.
5. The stove dome structure of claim 2, characterized in that the acid resistant spray coating (130) has a thickness of 80-100mm.
6. The stove dome structure of claim 1, characterized in that the stainless steel plate layer (120) comprises a plurality of stainless steel plates, between adjacent two stainless steel plates are partially stacked, the stainless steel plates are fixedly connected to the acid-resistant spray coating (130).
7. The stove dome structure of claim 6 wherein two adjacent stainless steel plates are stacked transversely by more than 300mm and stacked longitudinally by more than 400mm; the stainless steel plate is fixed to the acid-resistant sprayed layer (130) by a connector.
8. The stove dome structure of claim 6 wherein said stainless steel plate is S31008.
9. The stove dome structure of any one of claims 1 to 8, characterized in that the refractory insulation layer (110) comprises a ceramic fiber layer (111) and a brick layer arranged in sequence, the ceramic fiber layer (111) being located between the stainless steel plate layer (120) and the brick layer.
10. The stove dome structure of claim 9, characterized in that the brick layers comprise a light clay brick layer (112), a light silica brick layer (113) and a heavy silica brick layer (114) arranged in sequence, the light clay brick layer (112) being located between the ceramic fiber layer (111) and the light silica brick layer (113).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410319202.6A CN118006858A (en) | 2024-03-20 | 2024-03-20 | Vault structure of hot blast stove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410319202.6A CN118006858A (en) | 2024-03-20 | 2024-03-20 | Vault structure of hot blast stove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118006858A true CN118006858A (en) | 2024-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410319202.6A Pending CN118006858A (en) | 2024-03-20 | 2024-03-20 | Vault structure of hot blast stove |
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| Country | Link |
|---|---|
| CN (1) | CN118006858A (en) |
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- 2024-03-20 CN CN202410319202.6A patent/CN118006858A/en active Pending
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