CN117433298A - Construction method for refractory material at special-shaped brick supporting plate of high-temperature reducing gas pipeline of hydrogen-based shaft furnace - Google Patents
Construction method for refractory material at special-shaped brick supporting plate of high-temperature reducing gas pipeline of hydrogen-based shaft furnace Download PDFInfo
- Publication number
- CN117433298A CN117433298A CN202311208494.8A CN202311208494A CN117433298A CN 117433298 A CN117433298 A CN 117433298A CN 202311208494 A CN202311208494 A CN 202311208494A CN 117433298 A CN117433298 A CN 117433298A
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- Prior art keywords
- brick
- reducing gas
- gas pipeline
- special
- supporting plate
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- 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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- 239000011449 brick Substances 0.000 title claims abstract description 208
- 239000007789 gas Substances 0.000 title claims abstract description 74
- 238000010276 construction Methods 0.000 title claims abstract description 48
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 239000001257 hydrogen Substances 0.000 title claims abstract description 22
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 22
- 239000011819 refractory material Substances 0.000 title claims abstract description 11
- 229920000742 Cotton Polymers 0.000 claims abstract description 22
- 238000005520 cutting process Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 19
- 238000005266 casting Methods 0.000 claims description 13
- 238000009415 formwork Methods 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 12
- 238000004873 anchoring Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 4
- 239000010426 asphalt Substances 0.000 claims description 3
- 230000001680 brushing effect Effects 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
Classifications
-
- 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
- F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
- F27D1/1621—Making linings by using shaped elements, e.g. bricks
-
- 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
- F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
- F27D7/02—Supplying steam, vapour, gases, or liquids
Abstract
The application discloses a refractory construction method for a special-shaped brick supporting plate of a high-temperature reducing gas pipeline of a hydrogen-based shaft furnace, which comprises the following steps: and performing construction of a first layer of castable on the inner wall of the high-temperature reducing gas pipeline except the special-shaped brick supporting plate. And (5) building refractory bricks in the high-temperature reducing gas pipeline. And cutting the outer side part of the No. 7 brick at the special-shaped brick supporting plate. And paving expansion cotton at the outer side part of the No. 7 brick. And building No. 6 bricks on the upper part of the special-shaped brick supporting plate. And paving expansion cotton on the upper part of the No. 7 brick. And building No. 5 bricks on the upper parts of the No. 7 bricks and the No. 6 bricks. And building a No. 4 brick on the upper part of the No. 5 brick. And pouring a first layer of castable between the outer side parts of the No. 6 brick, the No. 5 brick and the No. 4 brick and the inner wall of the high-temperature reducing gas pipeline. And (5) building refractory bricks on the upper part of the No. 4 bricks. The application provides a construction method for refractory materials at a special-shaped brick supporting plate of a high-temperature reducing gas pipeline of a hydrogen-based shaft furnace, which enables construction to be carried out smoothly and reliably and ensures construction quality.
Description
Technical Field
The application relates to the field of hydrogen-based shaft furnaces, in particular to a construction method for refractory materials at a special-shaped brick supporting plate of a high-temperature reducing gas pipeline of a hydrogen-based shaft furnace.
Background
Because the pipeline construction space is narrow, the refractory design is complex, the design quality requirement is high, and the refractory construction at the special-shaped brick supporting plate of the reducing gas conveying pipeline at high temperature and high pressure still has no set of refractory construction solution.
Disclosure of Invention
The application provides a construction method for refractory materials at a special-shaped brick supporting plate of a high-temperature reducing gas pipeline of a hydrogen-based shaft furnace, which can enable construction to be carried out smoothly and reliably and ensure construction quality.
The embodiment of the application provides a construction method for refractory materials at a special-shaped brick supporting plate of a high-temperature reducing gas pipeline of a hydrogen-based shaft furnace, which comprises the following steps: and performing construction of a first layer of castable on the inner wall of the high-temperature reducing gas pipeline except the special-shaped brick supporting plate. And (5) building refractory bricks in the high-temperature reducing gas pipeline until reaching the special-shaped brick supporting plate. And cutting the outer side part of the No. 7 brick at the special-shaped brick supporting plate according to the inclination angle of the inner side part of the special-shaped brick supporting plate. And paving expansion cotton at the outer side part of the No. 7 brick. And building a No. 6 brick on the upper part of the special-shaped brick supporting plate, and attaching the inner side part of the No. 6 brick to the outer side part of the No. 7 brick through expansion cotton. And paving expansion cotton on the upper part of the No. 7 brick. And building a No. 5 brick on the upper parts of the No. 7 brick and the No. 6 brick, wherein the bottom of the No. 5 brick is attached to the upper part of the No. 7 brick through expansion cotton. And building a No. 4 brick on the upper part of the No. 5 brick. And pouring a first layer of castable between the outer side parts of the No. 6 brick, the No. 5 brick and the No. 4 brick and the inner wall of the high-temperature reducing gas pipeline to finish the construction of the first layer of castable on the inner wall of the high-temperature reducing gas pipeline at the special-shaped brick supporting plate. And (3) building refractory bricks on the upper part of the No. 4 brick until reaching a preset end position.
In some embodiments, before the construction of the first layer of castable on the inner wall of the high-temperature reducing gas pipeline, pasting fiber paper at the special-shaped brick supporting plate, brushing asphalt on an anchoring piece in the high-temperature reducing gas pipeline, and secondarily screwing in the joint protection of the anchoring piece.
In some embodiments, in the construction process of the first layer of castable, the formwork of the first layer of castable is carried out, wherein 494mm is reserved above the lowest point of the inner side part of the special-shaped brick supporting plate, the formwork is not carried out, the first layer of castable is poured between the inner wall of the high-temperature reducing gas pipeline and the formwork after the formwork is carried out, and the mould and the scaffold are maintained and removed after the pouring is finished.
In some embodiments, after the construction of the first layer of castable is completed, installing sealing plates at the upper end and the lower end of the high-temperature reducing gas pipeline, and pre-baking, wherein the temperature of the high-temperature reducing gas pipeline is heated to 200 ℃ from normal temperature, baking is finished for 60 hours, the sealing plates are removed, and the temperature in the high-temperature reducing gas pipeline is naturally cooled to normal temperature.
In some embodiments, after the construction of the first layer of castable is completed, checking whether the first layer of castable has cracks of more than 3mm, and if so, dismantling the first layer of castable at the cracks and carrying out casting again.
In some of these embodiments, a second layer of castable is poured between the refractory brick and the first layer of castable every two layers of refractory brick are built during the course of the building of the refractory brick in the high temperature reducing gas conduit.
In some embodiments, in the process of cutting the outer side part of the No. 7 brick at the special-shaped support brick plate according to the inclination angle of the inner side part of the special-shaped support brick plate, the processing length of the No. 7 brick is calculated according to the elevation of the special-shaped support brick plate, if the processing length is greater than 1/2 of the original brick length, the outer side part of the No. 7 brick and the outer side part of the next layer of refractory brick are cut, and if the processing length is not greater than 1/2 of the original brick length, only the outer side part of the No. 7 brick is cut.
In some of these embodiments, during the course of laying the refractory brick on top of brick No. 4, a second layer of castable is poured between the refractory brick and the first layer of castable for each two courses of refractory brick laid.
In some of these embodiments, cleaning of the interior of the high temperature reducing gas conduit occurs after the masonry of the refractory bricks reaches a preset end position.
In some embodiments, after cleaning the inside of the high-temperature reducing gas pipeline, installing sealing plates at the upper end and the lower end of the high-temperature reducing gas pipeline, and pre-baking, wherein the temperature of the high-temperature reducing gas pipeline is heated to 350 ℃ from normal temperature, baking is carried out for 147 hours, and the sealing plates are disassembled after baking is finished.
According to the embodiment of the application, the construction method for the refractory material at the special-shaped brick supporting plate of the high-temperature reducing gas pipeline of the hydrogen-based shaft furnace comprises the following steps: and performing construction of a first layer of castable on the inner wall of the high-temperature reducing gas pipeline except the special-shaped brick supporting plate. And (5) building refractory bricks in the high-temperature reducing gas pipeline until reaching the special-shaped brick supporting plate. And cutting the outer side part of the No. 7 brick at the special-shaped brick supporting plate according to the inclination angle of the inner side part of the special-shaped brick supporting plate. And paving expansion cotton at the outer side part of the No. 7 brick. And building a No. 6 brick on the upper part of the special-shaped brick supporting plate, and attaching the inner side part of the No. 6 brick to the outer side part of the No. 7 brick through expansion cotton. And paving expansion cotton on the upper part of the No. 7 brick. And building a No. 5 brick on the upper parts of the No. 7 brick and the No. 6 brick, wherein the bottom of the No. 5 brick is attached to the upper part of the No. 7 brick through expansion cotton. And building a No. 4 brick on the upper part of the No. 5 brick. And pouring a first layer of castable between the outer side parts of the No. 6 brick, the No. 5 brick and the No. 4 brick and the inner wall of the high-temperature reducing gas pipeline to finish the construction of the first layer of castable on the inner wall of the high-temperature reducing gas pipeline at the special-shaped brick supporting plate. And (3) building refractory bricks on the upper part of the No. 4 brick until reaching a preset end position. The application provides a construction method for refractory materials at a special-shaped brick supporting plate of a high-temperature reducing gas pipeline of a hydrogen-based shaft furnace, which enables construction to be carried out smoothly and reliably and ensures construction quality.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a layout design diagram of refractory materials at a special-shaped brick supporting plate of a high-temperature reducing gas pipeline in an embodiment of the application;
FIG. 2 is a schematic illustration of a first layer of castable casting completion in an embodiment of the present application;
fig. 3 is a schematic diagram of the construction completion of the second layer castable on the outer side of the No. 7 brick in the embodiment of the application;
FIG. 4 is a schematic diagram of an expanded cotton lay-up completion in an embodiment of the present application;
FIG. 5 is a schematic view of a number 6 brick construction in an embodiment of the present application;
FIG. 6 is a schematic diagram of an expanded cotton lay-up completion in an embodiment of the present application;
FIG. 7 is a schematic diagram of a brick No. 5 and a brick No. 4 in the embodiment of the present application;
fig. 8 is a schematic diagram of casting completion of the first layer of casting material on the outer side of the bricks No. 6, no. 5 and No. 4 in the embodiment of the application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
Referring to fig. 1-8, an embodiment of the present application provides a refractory construction method for a special-shaped brick supporting plate 2 of a high-temperature reducing gas pipeline 1 of a hydrogen-based shaft furnace, which includes the following steps:
(1) And (5) entering a high-temperature reducing gas pipeline 1 for acceptance.
(2) And pasting fiber paper at the special-shaped brick supporting plate 2.
(3) Asphalt is coated on the anchoring piece 3 in the high-temperature reducing gas pipeline 1.
(4) The interface of the secondary screwing anchor 3 is protected.
(5) Construction of the first layer castable 4 (CASTDB) on the inner wall of the high temperature reducing gas pipe 1 except at the special-shaped tile supporting plate 2 was performed.
In the above steps, the formwork of the first layer of castable 4 is carried out, wherein 494mm is reserved above the lowest point of the inner side part of the special-shaped brick supporting plate 2, and no formwork is carried out, that is, 50mm is added as the reserved final height on the basis of the heights of the No. 4 bricks 9, no. 5 bricks 8 and No. 6 bricks 7, so that the construction of the follow-up castable is facilitated. And after the formwork is completed, pouring a first layer of castable 4 between the inner wall of the high-temperature reducing gas pipeline 1 and the formwork. And curing after casting is completed, and removing the mould and the scaffold.
(6) Sealing plates are arranged at the upper end and the lower end of the high-temperature reducing gas pipeline 1 for pre-baking, wherein the temperature of the high-temperature reducing gas pipeline 1 is heated to 200 ℃ from normal temperature, baking is carried out for 60 hours, the sealing plates are removed after baking is finished, and the temperature in the high-temperature reducing gas pipeline 1 is naturally cooled to normal temperature.
(7) Checking whether the first layer castable 4 has cracks of more than 3mm, and if so, dismantling the first layer castable 4 at the crack position and carrying out casting again.
(8) And (5) building refractory bricks in the high-temperature reducing gas pipeline 1 until reaching the special-shaped brick supporting plate 2.
In the steps, a second layer of castable 5 (CASTGK-2) is poured between the refractory bricks and the first layer of castable for each two layers of refractory bricks, and the construction is circularly carried out to the special-shaped brick supporting plate 2.
(9) And cutting the outer side part of the No. 7 brick 6 at the position of the special-shaped brick supporting plate 2 according to the inclination angle of the inner side part of the special-shaped brick supporting plate 2.
In the above steps, in the process of cutting the outer side part of the No. 7 brick 6 at the position of the special-shaped brick supporting plate 2 according to the inclination angle of the inner side part of the special-shaped brick supporting plate 2, according to the elevation of the special-shaped brick supporting plate 2, the processing length of the No. 7 brick 6 is calculated, if the processing length is greater than 1/2 of the original brick length, the outer side part of the No. 7 brick 6 and the outer side part of the next layer of refractory brick are cut, and if the processing length is not greater than 1/2 of the original brick length, the outer side part of the No. 7 brick 6 is cut only. In addition, the second layer castable 5 (CASTGK-2) on the outer side part of the No. 7 brick 6 is smeared by making a profiling in advance.
(10) And paving the expansion cotton 10 at the outer side part of the No. 7 brick 6.
In the above steps, the expanded cotton 10 is laid between the No. 6 bricks 7 and the No. 7 bricks 6.
(11) And building a No. 6 brick 7 on the upper part of the special-shaped brick supporting plate 2, and attaching the inner side part of the No. 6 brick 7 to the outer side part of the No. 7 brick 6 through expansion cotton 10.
(12) An expansion cotton (expansion gap fiber cotton) is laid on the upper part of the No. 7 brick 6.
(13) And bricks No. 5 and 8 are built on the upper parts of the bricks No. 7 and No. 6 and 7, and the bottoms of the bricks No. 5 and 8 are attached to the upper part of the brick No. 6 through expansion cotton.
(14) And building a No. 4 brick 9 on the upper part of the No. 5 brick 8.
(15) And pouring a first layer of castable 4 (CASTDB) between the outer side parts of the No. 6 bricks, the No. 5 bricks 8 and the No. 4 bricks 9 and the inner wall of the high-temperature reducing gas pipeline 1 to finish the construction of the first layer of castable 4 on the inner wall of the high-temperature reducing gas pipeline 1 at the special-shaped brick supporting plate 2.
(16) And (3) building refractory bricks on the upper parts of the No. 4 bricks 9 until reaching a preset end position.
In the steps, a second layer of castable 5 (CASTGK-2) is poured between the refractory bricks and the first layer of castable once every two layers of refractory bricks are built, and the construction is circulated until the end.
(17) Cleaning of the inside of the high-temperature reducing gas pipe 1 is performed.
(18) Sealing plates are arranged at the upper end and the lower end of the high-temperature reducing gas pipeline 1 for pre-baking, wherein the temperature of the high-temperature reducing gas pipeline 1 is heated to 350 ℃ from normal temperature, baking is carried out for 147 hours, the sealing plates are removed after baking is finished, and the high-temperature reducing gas pipeline 1 is lifted according to a field lifting plan.
According to the method, the construction quality of the refractory at the key part is finally ensured through the range of the refractory formwork at the special-shaped brick supporting plate 2, the optimization and adjustment of the construction procedure and the control measures for improving the construction process. The application provides a construction method of refractory materials at the position of a special-shaped brick supporting plate 2 of a high-temperature reducing gas pipeline 1 of a hydrogen-based shaft furnace, so that construction can be smoothly and reliably carried out, and construction quality is ensured.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components. In the description of the present application, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, this is for convenience of description and simplification of the description, but does not indicate or imply that the apparatus or element to be referred must have a specific azimuth, be constructed and operated in a specific azimuth, and thus terms describing the positional relationship in the drawings are merely used for illustration and are not to be construed as limitations of the present patent, and that the specific meaning of the terms described above may be understood by those of ordinary skill in the art according to the specific circumstances.
The foregoing description of the preferred embodiment of the present invention is not intended to limit the invention to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Claims (10)
1. The construction method of the refractory material at the special-shaped brick supporting plate of the high-temperature reducing gas pipeline of the hydrogen-based shaft furnace is characterized by comprising the following steps of:
performing construction of a first layer of castable on the inner wall of the high-temperature reducing gas pipeline except for the special-shaped brick supporting plate;
building refractory bricks in the high-temperature reducing gas pipeline until reaching the special-shaped brick supporting plate;
cutting the outer side part of the No. 7 brick at the special-shaped brick supporting plate according to the inclination angle of the inner side part of the special-shaped brick supporting plate;
paving expansion cotton at the outer side part of the No. 7 brick;
building a No. 6 brick on the upper part of the special-shaped brick supporting plate, wherein the inner side part of the No. 6 brick is attached to the outer side part of the No. 7 brick through the expansion cotton;
paving expansion cotton on the upper part of the No. 7 brick;
building a No. 5 brick on the upper parts of the No. 7 brick and the No. 6 brick, wherein the bottom of the No. 5 brick is attached to the upper part of the No. 7 brick through the expansion cotton;
building a No. 4 brick on the upper part of the No. 5 brick;
pouring a first layer of castable between the outer side parts of the No. 6 brick, the No. 5 brick and the No. 4 brick and the inner wall of the high-temperature reducing gas pipeline to finish the construction of the first layer castable on the inner wall of the high-temperature reducing gas pipeline at the special-shaped brick supporting plate;
and (3) building refractory bricks on the upper part of the No. 4 brick until reaching a preset end position.
2. The method for constructing the refractory at the special-shaped brick supporting plate of the high-temperature reducing gas pipeline of the hydrogen-based shaft furnace according to claim 1, wherein,
before the construction of the first layer of castable on the inner wall of the high-temperature reducing gas pipeline, pasting fiber paper at the special-shaped brick supporting plate, brushing asphalt on an anchoring piece in the high-temperature reducing gas pipeline, and secondarily screwing up the joint protection of the anchoring piece.
3. The method for constructing the refractory at the special-shaped brick supporting plate of the high-temperature reducing gas pipeline of the hydrogen-based shaft furnace according to claim 1, wherein,
and in the construction process of the first layer of castable, carrying out formwork supporting of the first layer of castable, wherein 494mm is reserved above the lowest point of the inner side part of the special-shaped brick supporting plate, no formwork supporting is carried out, after the formwork supporting is finished, the first layer of castable is poured between the inner wall of the high-temperature reducing gas pipeline and the formwork supporting, and after the pouring is finished, maintenance is carried out, and the mould and the scaffold are removed.
4. The method for constructing the refractory at the special-shaped brick supporting plate of the high-temperature reducing gas pipeline of the hydrogen-based shaft furnace according to claim 1, wherein,
after the construction of the first layer of castable is completed, sealing plates are arranged at the upper end and the lower end of the high-temperature reducing gas pipeline for pre-baking, wherein the temperature of the high-temperature reducing gas pipeline is heated to 200 ℃ from normal temperature, baking is finished for 60 hours, the sealing plates are removed, and the temperature in the high-temperature reducing gas pipeline is naturally cooled to normal temperature.
5. The method for constructing the refractory at the special-shaped brick supporting plate of the high-temperature reducing gas pipeline of the hydrogen-based shaft furnace according to claim 1, wherein,
after the construction of the first layer of castable is finished, checking whether the first layer of castable has cracks with the diameter of more than 3mm, and if so, dismantling the first layer of castable at the crack position and carrying out casting again.
6. The method for constructing the refractory at the special-shaped brick supporting plate of the high-temperature reducing gas pipeline of the hydrogen-based shaft furnace according to claim 1, wherein,
and in the process of building the refractory bricks in the high-temperature reducing gas pipeline, casting a second layer of casting material between the refractory bricks and the first layer of casting material every two layers of refractory bricks.
7. The method for constructing the refractory at the special-shaped brick supporting plate of the high-temperature reducing gas pipeline of the hydrogen-based shaft furnace according to claim 1, wherein,
and in the process of cutting the outer side part of the No. 7 brick at the special-shaped brick supporting plate according to the inclination angle of the inner side part of the special-shaped brick supporting plate, measuring and calculating the processing length of the No. 7 brick according to the elevation of the special-shaped brick supporting plate, if the processing length is greater than 1/2 of the original brick length, cutting the outer side part of the No. 7 brick and the outer side part of the next layer of refractory brick, and if the processing length is not greater than 1/2 of the original brick length, cutting the outer side part of the No. 7 brick.
8. The method for constructing the refractory at the special-shaped brick supporting plate of the high-temperature reducing gas pipeline of the hydrogen-based shaft furnace according to claim 1, wherein,
and in the process of building the refractory bricks on the upper part of the No. 4 brick, casting a second layer of casting material between the refractory bricks and the first layer of casting material every two layers of refractory bricks.
9. The method for constructing the refractory at the special-shaped brick supporting plate of the high-temperature reducing gas pipeline of the hydrogen-based shaft furnace according to claim 1, wherein,
and after the masonry of the refractory bricks reaches the preset end position, cleaning the interior of the high-temperature reducing gas pipeline.
10. The method for constructing the refractory at the special-shaped brick supporting plate of the high-temperature reducing gas pipeline of the hydrogen-based shaft furnace according to claim 9, wherein,
after the high-temperature reducing gas pipeline is cleaned, sealing plates are arranged at the upper end and the lower end of the high-temperature reducing gas pipeline for pre-baking, wherein the temperature of the high-temperature reducing gas pipeline is heated to 350 ℃ from normal temperature, baking is carried out for 147 hours, and the sealing plates are removed after baking is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311208494.8A CN117433298A (en) | 2023-09-19 | 2023-09-19 | Construction method for refractory material at special-shaped brick supporting plate of high-temperature reducing gas pipeline of hydrogen-based shaft furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311208494.8A CN117433298A (en) | 2023-09-19 | 2023-09-19 | Construction method for refractory material at special-shaped brick supporting plate of high-temperature reducing gas pipeline of hydrogen-based shaft furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117433298A true CN117433298A (en) | 2024-01-23 |
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ID=89550548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311208494.8A Pending CN117433298A (en) | 2023-09-19 | 2023-09-19 | Construction method for refractory material at special-shaped brick supporting plate of high-temperature reducing gas pipeline of hydrogen-based shaft furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117433298A (en) |
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2023
- 2023-09-19 CN CN202311208494.8A patent/CN117433298A/en active Pending
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