CN114635009B - Using method of furnace skirt slag baffle structure - Google Patents
Using method of furnace skirt slag baffle structure Download PDFInfo
- Publication number
- CN114635009B CN114635009B CN202210223231.3A CN202210223231A CN114635009B CN 114635009 B CN114635009 B CN 114635009B CN 202210223231 A CN202210223231 A CN 202210223231A CN 114635009 B CN114635009 B CN 114635009B
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- rod
- slag
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- slag baffle
- furnace
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- 239000002893 slag Substances 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000009434 installation Methods 0.000 claims abstract description 14
- 230000000903 blocking effect Effects 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 5
- 238000003780 insertion Methods 0.000 abstract description 4
- 230000037431 insertion Effects 0.000 abstract description 4
- 238000003466 welding Methods 0.000 abstract description 3
- 101100204059 Caenorhabditis elegans trap-2 gene Proteins 0.000 description 13
- 239000007921 spray Substances 0.000 description 9
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Images
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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Furnace Details (AREA)
Abstract
The invention belongs to the field of converters, in particular to a slag baffle structure of a furnace skirt and a use method, aiming at the problem that when the slag baffle is installed in a welding mode in the prior art, the slag baffle is troublesome to detach, the invention provides a scheme which comprises a furnace body, wherein a support ring is fixedly installed on the inner upper part of the furnace body, the slag baffle positioned above the support ring is arranged on the inner wall of the furnace body, a support grid is embedded on the slag baffle, two installation rods are symmetrically and fixedly installed at the bottom of the slag baffle, two insertion holes are symmetrically formed in the support ring, and the bottom ends of the two installation rods respectively penetrate through the two insertion holes and extend to the lower part of the support ring.
Description
Technical Field
The invention relates to the technical field of converters, in particular to a furnace skirt slag baffle structure and a using method thereof.
Background
The converter is an indispensable device in the steelmaking production process, wherein a slag baffle is arranged at the furnace cap of the furnace body, and the slag baffle is used for protecting the parts such as a cooling water pipe of the furnace body from being burnt and corroded by splashed molten steel and steel slag in the smelting process, so that the slag baffle is an important safety protection accessory.
The publication CN108913841a discloses a method for replacing the converter skirt, which method comprises: step 1), dismantling a revolving furnace apron board, shaking the revolving furnace to a position with a furnace mouth facing upwards, installing an operation platform on a revolving furnace backing ring, and erecting the operation platform on a front platform and a rear platform of the revolving furnace; step 2) based on the working platform set up in the step 1), respectively replacing a converter apron board framework of a front-furnace platform and a converter apron board framework of a rear-furnace platform; step 3) placing the automobile crane on a front furnace platform, and replacing a converter apron board of the front furnace platform; step 4) replacing a converter apron board of the post-furnace platform; step 5) repeating the step 3) and the step 4), and replacing the converter apron boards of the front-furnace platform and the rear-furnace platform until the replacement operation is completed.
The patent with publication number CN209759497U discloses a sealing device between a converter waste heat boiler skirt cover and a moving section flue, which comprises an air pipe and a plurality of spray pipes, wherein an inlet of the spray pipes is communicated with the air pipe, the spray pipes are provided with spray nozzles which extend into the skirt cover from the top of the skirt cover and are close to a skirt cover heated pipe, the spray nozzles are enclosed to form at least two layers of annular structures, and a gap for the skirt cover heated pipe to pass through is arranged between every two adjacent layers of annular structures. The novel structure is simple, only the air pipe and a plurality of spray pipes communicated with the air pipe are needed to be added around the existing skirt cover, the spray nozzles of the spray pipes extend into the skirt cover, and the spray nozzles are enclosed to form at least two layers of annular structures; the sealing effect is good, and the multi-layer nozzle forms a multi-layer high-pressure gas barrier, so that the flue gas is prevented from overflowing more effectively; the safety is high, can adopt nitrogen gas or steam seal, and sealing gas mixes in the flue gas and takes away, safe and reliable.
At present, when the slag baffle is installed, the operation is generally performed in a welding mode, and when the operation is performed in a disassembling mode, a breaking and disassembling tool is often used for disassembling, so that the operation is very troublesome, and therefore, the furnace skirt slag baffle structure is provided for solving the problems.
Disclosure of Invention
The invention aims to solve the defect that the slag baffle plate is troublesome when being detached in a welding mode in the prior art, and provides a furnace skirt slag baffle plate structure and a using method.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a stove skirt slag trap structure, includes the furnace body, fixed mounting has the holding ring on the interior of furnace body, and be equipped with the slag trap that is located the holding ring top on the inner wall of furnace body, inlay on the slag trap and be equipped with the support grid, the bottom symmetry fixed mounting of slag trap has two installation poles, and two jacks have been seted up to the holding ring on the symmetry, two jacks are run through respectively to the bottom of holding ring and all extend to the below of holding ring to the bottom of two installation poles, the cover is equipped with the spacing pipe that is located the holding ring top on the installation pole, and one side rotation of spacing pipe is connected with the dwang, the bottom fixed mounting of dwang has L type gag lever post, and the bottom of L type gag lever post runs through the holding ring and with the bottom fixed connection of installation pole, the installation pole is connected with the dwang transmission.
Preferably, a connecting rod is fixedly arranged at the top of one side of the mounting rod, the bottom end of the connecting rod is rotationally connected with one side of the top of the rotating rod, and the rotating rod can be driven to rotate when the mounting rod longitudinally moves.
Preferably, the L-shaped limiting rod is provided with a bolt, the bottom end of the mounting rod is provided with a thread groove, the top end of the bolt extends into the thread groove and is in threaded connection with the inner wall of the thread groove, the L-shaped limiting rod is fixedly provided with a pressing rod, the top ends of the two pressing rods are contacted with the bottom of the supporting ring, and the fixed connection of the L-shaped limiting rod and the mounting rod can be realized.
Preferably, two inclined plates are symmetrically and fixedly installed on the inner wall of the limiting pipe, two connecting pipes located in the limiting pipe are symmetrically and slidingly connected to the mounting rod, two L-shaped moving rods are symmetrically and slidingly connected to the connecting pipes, one ends, away from each other, of the two L-shaped moving rods extend into the limiting pipe and are rotationally connected with rollers, the two rollers are respectively contacted with the inclined surfaces of the two inclined plates, and the two L-shaped moving rods can be mutually away from each other when the mounting rod is pressed down.
Preferably, the two L-shaped moving rods are fixedly provided with extension springs at the ends close to each other, and the ends close to each other of the two extension springs are fixedly connected with the inner wall of the connecting pipe, so that the mounting rods can be driven to reset under the action of the extension springs.
The application method of the furnace skirt slag baffle structure comprises the following steps:
s1, placing a slag blocking plate on a supporting ring, and enabling two mounting rods to be respectively inserted into two jacks;
s2, pressing down the slag baffle to drive the mounting rod to move downwards, so that the two rollers are respectively contacted with the inclined planes of the two inclined plates;
s3, when the mounting rod moves downwards, the two L-shaped moving rods are far away from each other, and the tension spring is in a stressed and stretched state;
s4, when the mounting rod moves downwards, the rotating rod can be driven to rotate downwards under the transmission of the connecting rod until the rotating rod is rotated to be in a horizontal state;
s5, at the moment, the L-shaped limiting rod can be contacted with the mounting rod, and the slag blocking plate is fixedly mounted;
s6, when the slag blocking plate needs to be disassembled, the bolts can be disassembled firstly, so that the mounting rod can be driven to move upwards;
s7, the L-shaped limiting rod can rotate upwards at the moment, so that the slag trap can be detached, and the slag trap can be quickly detached and assembled when in use.
Further, in S4, when the rotating rod is driven to rotate downwards by the transmission of the connecting rod, the tension spring in the tension stress state can drive the two L-shaped moving rods to approach each other.
Further, in S5, the L-shaped stopper rod is brought into contact with the mounting rod, and then the bolt is inserted into the thread groove through the L-shaped stopper rod, so that the bolt is screwed with the thread groove.
The invention has the beneficial effects that:
according to the technical scheme, the slag blocking plate is placed on the supporting ring, the two mounting rods are respectively inserted into the two insertion holes, then the slag blocking plate can be pressed down to drive the mounting rods to move downwards, the extension springs can be in a stressed and stretched state, when the mounting rods move downwards, the rotating rods can be driven to rotate downwards until the L-shaped limiting rods are in contact with the mounting rods, and then the bolts penetrate through the L-shaped limiting rods and are inserted into the thread grooves, so that the bolts are in threaded connection with the thread grooves, and therefore the slag blocking plate can be fixedly mounted;
when the slag trap needs to be disassembled, the bolts can be disassembled firstly, and the tension springs in the tension stress state can drive the two L-shaped moving rods to be close to each other, so that the mounting rods can be driven to move upwards, and the L-shaped limiting rods can rotate upwards at the moment, so that the slag trap can be disassembled.
According to the invention, the fixed installation of the slag trap can be released by releasing the threaded connection of the bolt and the installation rod, so that the slag trap has good portability when being disassembled, and the slag trap can be quickly disassembled and assembled when in use.
Drawings
FIG. 1 is a front elevational view of the structure of the present invention;
FIG. 2 is a front view of the internal structure of the spacing tube of the present invention;
FIG. 3 is a top view of the slag blocking plate structure of the present invention;
fig. 4 is a schematic diagram of a portion a in fig. 1.
In the figure: the slag blocking device comprises a furnace body 1, a slag blocking plate 2, a supporting ring 3, a mounting rod 4, a limiting pipe 5, a connecting rod 6, a rotating rod 7, a limiting rod 8L, a slope plate 9, a limiting pipe 10, a moving rod 11L, a roller 12, a tension spring 13, a supporting grid 14, a bolt 15, a threaded groove 16 and a compression rod 17.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Referring to fig. 1-4, a furnace skirt slag trap structure comprises a furnace body 1, wherein a supporting ring 3 is fixedly installed on the inner side of the furnace body 1, a slag trap 2 positioned above the supporting ring 3 is arranged on the inner wall of the furnace body 1, a supporting grid 14 is embedded on the slag trap 2, two mounting rods 4 are symmetrically and fixedly installed at the bottom of the slag trap 2, two jacks are symmetrically arranged on the supporting ring 3, the bottom ends of the two mounting rods 4 respectively penetrate through the two jacks and extend to the lower side of the supporting ring 3, a limiting pipe 5 positioned above the supporting ring 3 is sleeved on the mounting rods 4, one side of the limiting pipe 5 is rotationally connected with a rotating rod 7, an L-shaped limiting rod 8 is fixedly installed at the bottom of the rotating rod 7, the bottom end of the L-shaped limiting rod 8 penetrates through the supporting ring 3 and is fixedly connected with the bottom end of the mounting rod 4, and the mounting rod 4 is in transmission connection with the rotating rod 7.
According to the technical scheme, the slag trap 2 is placed on the supporting ring 3, the two mounting rods 4 are respectively inserted into the two insertion holes, the slag trap 2 can be pressed down, the mounting rods 4 are driven to move downwards, the tension springs 13 can be in a stressed and stretched state, when the mounting rods 4 move downwards, the rotating rods 7 can be driven to rotate downwards until the L-shaped limiting rods 8 are contacted with the mounting rods 4, the bolts 15 penetrate through the L-shaped limiting rods 8 and are inserted into the threaded grooves 16, the bolts 15 are in threaded connection with the threaded grooves 16, so that the slag trap 2 can be fixedly installed, when the slag trap 2 needs to be detached, the bolts 15 can be detached firstly, and the tension springs 13 in the stretched and stretched state can drive the two L-shaped moving rods 11 to be close to each other, so that the mounting rods 4 can be driven to move upwards, and the slag trap 2 can be detached upwards.
In the invention, a connecting rod 6 is fixedly arranged at the top of one side of the mounting rod 4, the bottom end of the connecting rod 6 is rotationally connected with one side of the top of a rotating rod 7, and the rotating rod 7 can be driven to rotate when the mounting rod 4 longitudinally moves.
According to the invention, the bolt 15 is arranged on the L-shaped limiting rod 8, the threaded groove 16 is formed in the bottom end of the mounting rod 4, the top end of the bolt 15 extends into the threaded groove 16 and is in threaded connection with the inner wall of the threaded groove 16, the compression rods 17 are fixedly arranged on the L-shaped limiting rod 8, the top ends of the two compression rods 17 are in contact with the bottom of the supporting ring 3, and the fixed connection between the L-shaped limiting rod 8 and the mounting rod 4 can be realized.
In the invention, two inclined panels 9 are symmetrically and fixedly arranged on the inner wall of a limiting pipe 5, two connecting pipes 10 positioned in the limiting pipe 5 are symmetrically and slidingly connected on an installation rod 4, two L-shaped moving rods 11 are symmetrically and slidingly connected in the connecting pipes 10, one ends of the two L-shaped moving rods 11 far away from each other extend into the limiting pipe 5 and are rotationally connected with rollers 12, the two rollers 12 are respectively contacted with inclined surfaces of the two inclined panels 9, and the two L-shaped moving rods 11 can be far away from each other when the installation rod 4 is pressed down.
In the invention, extension springs 13 are fixedly arranged at the ends of the two L-shaped movable rods 11, which are close to each other, and the ends of the two extension springs 13, which are close to each other, are fixedly connected with the inner wall of the connecting pipe 10, so that the mounting rod 4 can be driven to reset under the action of the extension springs 13.
The invention also provides a using method of the furnace skirt slag baffle structure, which comprises the following steps:
s1, placing a slag blocking plate 2 on a supporting ring 3, and enabling two mounting rods 4 to be respectively inserted into two jacks;
s2, then the slag trap 2 is pressed down to drive the installation rod 4 to move downwards, and at the moment, the two rollers 12 are respectively contacted with the inclined planes of the two inclined panels 9;
s3, when the mounting rod 4 moves downwards, the two L-shaped moving rods 11 can be far away from each other, and the tension spring 13 can be in a stressed and stretched state;
s4, when the mounting rod 4 moves downwards, the rotating rod 7 can be driven to rotate downwards under the transmission of the connecting rod 6 until the rotating rod 7 is rotated to a horizontal state;
s5, at the moment, the L-shaped limiting rod 8 can be contacted with the mounting rod 4, and then the bolt 15 penetrates through the L-shaped limiting rod 8 and is inserted into the thread groove 16, so that the bolt 15 is in threaded connection with the thread groove 16, and the slag trap 2 can be fixedly mounted;
s6, when the slag trap 2 needs to be disassembled, the bolts 15 can be disassembled firstly, and the two L-shaped movable rods 11 can be driven to mutually approach by the tension springs 13 under the tension stress state, so that the mounting rods 4 can be driven to move upwards;
s7, the L-shaped limiting rod 8 can rotate upwards at the moment, and the slag trap 2 can be detached, so that the technical scheme has good portability, and the slag trap 2 can be quickly detached and assembled when in use.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (7)
1. The using method of the furnace skirt slag baffle structure is characterized in that a supporting ring (3) is fixedly arranged on the inner wall of a furnace body (1), a slag baffle (2) positioned above the supporting ring (3) is arranged on the inner wall of the furnace body (1), a supporting grid (14) is embedded on the slag baffle (2), two mounting rods (4) are symmetrically and fixedly arranged at the bottom of the slag baffle (2), two jacks are symmetrically arranged on the supporting ring (3), the bottom ends of the two mounting rods (4) respectively penetrate through the two jacks and extend to the lower part of the supporting ring (3), a limiting pipe (5) positioned above the supporting ring (3) is sleeved on the mounting rods (4), one side of the limiting pipe (5) is rotationally connected with a rotating rod (7), an L-shaped limiting rod (8) is fixedly arranged at the bottom of the rotating rod (7), the bottom end of the L-shaped limiting rod (8) penetrates through the supporting ring (3) and is fixedly connected with the bottom end of the mounting rod (4), and the mounting rod (4) is in transmission connection with the rotating rod (7);
the application method of the furnace skirt slag baffle structure comprises the following steps:
s1, placing a slag blocking plate (2) on a supporting ring (3) and enabling two mounting rods (4) to be respectively inserted into two jacks;
s2, then the slag baffle (2) is pressed down to drive the mounting rod (4) to move downwards, and at the moment, the two rollers (12) are respectively contacted with the inclined planes of the two inclined panels (9);
s3, when the mounting rod (4) moves downwards, the two L-shaped moving rods (11) are far away from each other, namely the tension spring (13) is in a stressed and stretched state;
s4, when the mounting rod (4) moves downwards, the rotating rod (7) is driven to rotate downwards by the transmission of the connecting rod (6) until the rotating rod (7) is rotated to a horizontal state;
s5, at the moment, the L-shaped limiting rod (8) is contacted with the mounting rod (4), and the slag trap (2) is fixedly mounted;
s6, when the slag trap (2) needs to be disassembled, the bolts (15) are disassembled firstly, so that the mounting rod (4) is driven to move upwards;
s7, the L-shaped limiting rod (8) can rotate upwards at the moment, namely, the slag trap (2) is detached, and the slag trap (2) is quickly detached and assembled when the slag trap is used.
2. The use method of the furnace skirt slag baffle structure according to claim 1, wherein a connecting rod (6) is fixedly arranged at the top of one side of the installation rod (4), and the bottom end of the connecting rod (6) is rotatably connected with one side of the top of the rotating rod (7).
3. The use method of the furnace skirt slag baffle structure according to claim 1, characterized in that a bolt (15) is arranged on the L-shaped limiting rod (8), a thread groove (16) is formed in the bottom end of the mounting rod (4), the top end of the bolt (15) extends into the thread groove (16) and is in threaded connection with the inner wall of the thread groove (16), a pressing rod (17) is fixedly arranged on the L-shaped limiting rod (8), and the top ends of the two pressing rods (17) are in contact with the bottom of the supporting ring (3).
4. The use method of the furnace skirt slag baffle structure according to claim 1, characterized in that two inclined panels (9) are symmetrically and fixedly installed on the inner wall of the limiting pipe (5), two connecting pipes (10) positioned in the limiting pipe (5) are symmetrically and slidingly connected on the installation rod (4), two L-shaped moving rods (11) are symmetrically and slidingly connected in the connecting pipes (10), one ends, far away from each other, of the two L-shaped moving rods (11) extend into the limiting pipe (5) and are rotationally connected with rollers (12), and the two rollers (12) are respectively contacted with inclined surfaces of the two inclined panels (9).
5. The method for using the furnace skirt slag baffle structure according to claim 4, wherein the two L-shaped moving rods (11) are fixedly provided with extension springs (13) at the ends close to each other, and the ends close to each other of the two extension springs (13) are fixedly connected with the inner wall of the connecting pipe (10).
6. The method for using the furnace skirt slag baffle structure according to claim 1, wherein in the step S4, when the rotating rod (7) is driven to rotate downwards by the transmission of the connecting rod (6), the two L-shaped moving rods (11) can be driven to approach each other by the tension spring (13) under the tension stress state.
7. The method of using a furnace skirt slag baffle structure according to claim 1, wherein in S5, the L-shaped limit rod (8) is contacted with the mounting rod (4), and then the bolt (15) is inserted into the thread groove (16) through the L-shaped limit rod (8) so that the bolt (15) is screwed with the thread groove (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210223231.3A CN114635009B (en) | 2022-03-09 | 2022-03-09 | Using method of furnace skirt slag baffle structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210223231.3A CN114635009B (en) | 2022-03-09 | 2022-03-09 | Using method of furnace skirt slag baffle structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114635009A CN114635009A (en) | 2022-06-17 |
| CN114635009B true CN114635009B (en) | 2023-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210223231.3A Active CN114635009B (en) | 2022-03-09 | 2022-03-09 | Using method of furnace skirt slag baffle structure |
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| CN (1) | CN114635009B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005290466A (en) * | 2004-03-31 | 2005-10-20 | Jfe Steel Kk | Skirt for exhaust gas treating apparatus in converter |
| CN100537787C (en) * | 2006-12-22 | 2009-09-09 | 江苏沙钢集团有限公司 | Integral furnace apron slag baffle |
| CN208532848U (en) * | 2018-07-13 | 2019-02-22 | 新疆八一钢铁股份有限公司 | Improved converter body skirt arrangement |
| CN210030778U (en) * | 2019-05-17 | 2020-02-07 | 沧州中铁装备制造材料有限公司 | High-reliability converter slag trap and converter |
| CN211645306U (en) * | 2019-12-27 | 2020-10-09 | 中冶南方工程技术有限公司 | Converter slag trap and converter |
| CN214785754U (en) * | 2021-01-24 | 2021-11-19 | 青岛益瑞海建设工程有限公司 | Detachable layered assembly type steel structure |
-
2022
- 2022-03-09 CN CN202210223231.3A patent/CN114635009B/en active Active
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| CN114635009A (en) | 2022-06-17 |
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