CN115110795A - Method and structure for repairing hopper wall of large cement product - Google Patents
Method and structure for repairing hopper wall of large cement product Download PDFInfo
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- CN115110795A CN115110795A CN202210691036.3A CN202210691036A CN115110795A CN 115110795 A CN115110795 A CN 115110795A CN 202210691036 A CN202210691036 A CN 202210691036A CN 115110795 A CN115110795 A CN 115110795A
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- bin
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000004568 cement Substances 0.000 title claims abstract description 32
- 239000000463 material Substances 0.000 claims abstract description 55
- 238000003860 storage Methods 0.000 claims abstract description 30
- 238000004873 anchoring Methods 0.000 claims abstract description 27
- 230000008439 repair process Effects 0.000 claims abstract description 20
- 239000002245 particle Substances 0.000 claims abstract description 18
- 239000000853 adhesive Substances 0.000 claims abstract description 16
- 230000001070 adhesive effect Effects 0.000 claims abstract description 16
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 238000003466 welding Methods 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims description 8
- 235000013372 meat Nutrition 0.000 claims description 8
- 229910003460 diamond Inorganic materials 0.000 claims description 4
- 239000010432 diamond Substances 0.000 claims description 4
- 239000000571 coke Substances 0.000 abstract description 32
- 238000004939 coking Methods 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 7
- 230000003139 buffering effect Effects 0.000 abstract description 5
- 230000007774 longterm Effects 0.000 abstract description 5
- 239000008187 granular material Substances 0.000 abstract 1
- 238000007711 solidification Methods 0.000 abstract 1
- 230000008023 solidification Effects 0.000 abstract 1
- 230000006872 improvement Effects 0.000 description 10
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 238000013016 damping Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 239000003082 abrasive agent Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0296—Repairing or restoring facades
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The invention discloses a method and a structure for repairing a hopper wall of a large cement product, wherein a mounting bottom plate is arranged in a damaged area of the hopper wall to cover the damaged area; binding a first anchoring nail used for fixing a wear-resistant material with a certain thickness on the mounting bottom plate, wherein the wear-resistant material is selected from the following materials: a blend of wear resistant particles and an adhesive; and finally, filling the wear-resistant material into a pit area formed between the hopper bin wall with a certain thickness and the mounting base plate, or establishing a storage bin of the wear-resistant material in a mode of arranging a baffle on the periphery of the damaged area, and finishing the repair of the damaged area of the hopper bin wall after the adhesive is cured. Through above mode, the hopper bulkhead after the restoration has fully utilized the large granule wear-resisting material to have stronger wearability after the solidification, possesses good buffering cushioning effect and rubber bounce simultaneously, has effectively reduced the impact damage of coke to the bulkhead, has obviously improved the life of coke bulkhead, makes coking process can long-term steady operation.
Description
Technical Field
The invention relates to the technical field of repair of bins, in particular to a method and a structure for repairing a bin wall of a large cement product hopper.
Background
The coke storage hopper of the coking system in the existing iron-making coking procedure is generally formed by integrally pouring cement products, the capacity of a single hopper is about 1500 tons of coke, and the manufacturing method of the hopper is that the hopper is formed into a cone hopper shape by integrally pouring concrete after steel bars are woven for molding, and the coke hopper is commonly called as a coke bin. Under the condition of long-term full discharge, coke entering the coke bin is directly contacted with the coke, and the friction on the bin wall is only slight sliding friction generated when the coke slowly slides down, so that the wear to the bin wall is small, and the damage to the bin wall is extremely small. However, when the coke bin is empty, the coke entering the coke bin directly impacts the bin wall after falling down due to the fact that the whole coke bin is in an emptying state, and then is immediately discharged. In the prior art, the solutions for solving the problems are mainly to carry out pouring repair by repeatedly using concrete or carry out emergency repair by taking measures of improving the grade of the concrete used in the repair process (namely, improving the strength of a concrete material) and the like, but in the practical process, the use time of the hopper bin wall repaired by the method can still be maintained for about 1 month, and then the problem of repeated perforation occurs in the original position, so that the coke part entering the coke bin is scattered from the hole and accumulated on a platform, and the manual cleaning workload is brought.
In the face of the situation, the repair mode of the existing coke bin wall needs to be reasonably optimized so as to solve the problem of short service life of direct pouring repair and realize the purpose of long-term stable operation of the coke bin in the coking process.
Disclosure of Invention
The invention aims to provide a large-particle high-strength wear-resistant material which is adhered and solidified in a damaged area of a hopper bin wall, has a certain buffering and damping effect and rubber rebound force, reduces the impact effect of coke on the bin wall, realizes the durable repair of the bin wall of a large cement product hopper, prolongs the service life of the coke bin wall, reduces the workload of cleaning and field customization management of post personnel, ensures the long-term stable operation of a coking process, and improves the coking efficiency.
In order to achieve the purpose, the invention provides the following technical scheme:
a method of repairing a large cement product hopper wall, the method comprising:
arranging a mounting bottom plate in a damaged area of the hopper bin wall to cover the damaged area;
the mounting base plate is provided with a plurality of first anchoring nails for fixing a certain thickness of wear-resistant material, wherein the wear-resistant material comprises: a blend of wear resistant particles and an adhesive;
and filling the wear-resistant material into a pit area formed between the hopper bin wall with a certain thickness and the mounting base plate, and finishing the repair of the damaged area of the hopper bin wall after the adhesive is cured.
As a further improvement of the present invention, the method further comprises: and fixedly mounting a baffle plate close to the undamaged bin wall along the periphery of the damaged area of the bin wall of the hopper, wherein the setting height of the baffle plate is greater than the setting thickness of the undamaged bin wall, so that a storage bin is formed in the damaged area.
As a further improvement of the invention, when the baffle is fixedly installed, the baffle is arranged perpendicular to the installation bottom plate.
As a further improvement of the present invention, when the first anchoring nails are bound, the setting directions of the first anchoring nails are all perpendicular to the mounting base plate.
As a further improvement of the invention, when the baffle is fixedly installed, a plurality of second anchoring nails are further bound on the outer side of the storage bin higher than the undamaged bin wall of the baffle.
As a further improvement of the present invention, the wear-resistant particles include, but are not limited to, diamond.
As a further improvement of the invention, when the first anchoring nails are bound, a plurality of the first anchoring nails are arranged at equal intervals.
As a further improvement of the invention, when the baffle is fixedly installed, the area of the baffle, which is in direct contact with the wear-resistant material, is coated with wear-resistant welding meat.
The invention also provides a repairing structure of the large cement product hopper bin wall, which comprises the following components:
the covering device comprises a mounting bottom plate for covering a damaged area of the wall of the hopper bin;
the fixing device comprises a plurality of first anchoring nails which are fixedly arranged on the mounting bottom plate and used for fixing a certain thickness of wear-resistant material; wherein the wear resistant material comprises: a blend of wear resistant particles and an adhesive;
and the storing device comprises a hopper bin wall with certain thickness and a pit formed between the mounting bottom plates.
As a further improvement of the invention, the storage device further comprises a baffle fixedly arranged along the periphery of the damaged area of the hopper bin wall and close to the undamaged bin wall, and the setting height of the baffle is greater than the setting thickness of the undamaged bin wall.
As a further improvement of the invention, a plurality of second anchoring nails are arranged on the baffle plate at the outer side of the storage bin higher than the undamaged bin wall.
As a further improvement of the invention, the area of the baffle plate, which is in direct contact with the wear-resistant material, is coated with wear-resistant welding meat.
The invention has the technical effects and advantages that:
according to the method and the structure for repairing the hopper wall of the large cement product, the mounting base plate is arranged in the damaged area of the hopper wall, the anchoring nails for fixing the wear-resistant material with a certain thickness are arranged on the mounting base plate, the wear-resistant material is mixed by high-strength wear-resistant particles and the adhesive and then is filled into the pit (namely the damaged area of the hopper wall) formed between the hopper wall with a certain thickness and the mounting base plate, and the damaged area of the hopper wall can be repaired after the adhesive is fully cured. The bin wall repaired by the repairing method has stronger wear resistance after being solidified by utilizing large-particle wear-resistant materials, and simultaneously has good buffering and damping effects and rubber rebound force, thereby reducing the impact damage of coke to the bin wall, obviously prolonging the service life of the bin wall, and improving the coking efficiency when the coking process can be stably operated for a long time.
According to the method and the structure for repairing the bin wall of the large cement product hopper, the baffle is arranged on the periphery of the damaged area of the bin wall of the hopper close to the undamaged bin wall, and the setting height of the baffle is set to be larger than the thickness of the bin wall of the hopper, so that the storage bin is formed in the damaged area of the bin wall. Therefore, the coke bin with the insufficient thickness of the bin wall of the hopper can be effectively repaired by pouring the wear-resistant material into the storage bin, and the application range of the repairing mode provided by the invention is further expanded; in addition, the baffle plate is arranged, so that the wear-resistant material is more firmly fixed in a damaged area, the problem that the wear-resistant material with certain thickness falls off in a large area is effectively avoided, and the service life of the repaired bin wall is further prolonged.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
FIG. 1 is a schematic view of the overall structure of a repairing structure of a large cement product hopper wall according to the present invention;
FIG. 2 is a schematic structural diagram of a repair structure of a large cement product hopper wall when not filled with a wear-resistant material according to the present invention;
FIG. 3 is a schematic view of a storage silo of the present invention;
FIG. 4 is a schematic view of the construction of the baffle plate of the present invention;
fig. 5 is a schematic structural diagram of the mounting base plate of the invention after welding the baffle plate.
Reference numerals
1. A wear resistant material; 2. reinforcing steel bars; 3. a first anchor nail; 5. a second anchor nail; 6. wear-resistant meat welding; 7. a hopper wall; 10. mounting a bottom plate; 11. a baffle plate; 12. placing holes for reinforcing steel bars; 13. and (6) welding meat.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to solve the defects of the prior art, the invention discloses a method for repairing the wall of a large cement product hopper, which comprises the following steps: (please understand the following steps in conjunction with the repair structure of the hopper wall of the large cement product in fig. 1) a mounting base plate 10 is arranged on the damaged area of the hopper wall 7 to cover the damaged area; a plurality of first anchoring nails 3 for fixing a certain thickness of wear-resistant material 1 on the inclined bin wall are bound on the mounting base plate 10, wherein the wear-resistant material 1 can comprise: a blend of wear resistant particles and an adhesive; the wear-resistant coating is preferably prepared by blending two materials, namely wear-resistant particles and adhesive, wherein the wear-resistant particles include, but are not limited to, diamond. As long as the hardness of the wear resistant particles used is higher than that of coke and concrete. Of course, the person skilled in the art will appreciate that the wear-resistant material 1 can in principle also be any product which is strong in wear resistance and also in curing. The wear-resistant material 1 is filled into a pit area formed between the hopper bin wall 7 with a certain thickness and the mounting base plate 10, and the repair of the damaged area of the hopper bin wall 7 can be completed after the adhesive is cured. The bin wall repaired by the repairing method has good buffering and damping effects and rubber rebound force, so that the impact damage of coke on the bin wall is reduced, the bin wall of the large cement product hopper is durably repaired, the service life of the bin wall of the coke is obviously prolonged, the workload of post personnel in cleaning and the difficulty in field customization management are reduced, and the coking process can be stably operated for a long time.
Specifically, when the first anchor nails 3 are bound, the plurality of first anchor nails 3 are preferably arranged at equal intervals. So set up, can just reach the purpose of fixing certain thickness wear-resistant material 1 under the prerequisite of using first anchor nail 3 as few as possible. In addition, it is preferable that the setting directions of the first anchoring nails 3 are all perpendicular to the installation base plate 10, so that the volume of the wear-resistant material 1 effectively fixed by each first anchoring nail 3 can be increased as much as possible, the number of the first anchoring nails 3 to be bound is further reduced, and the repair efficiency is improved.
Further, the method sometimes further comprises the steps of: (please refer to the following steps together with the schematic structural diagram of the repair of the bin wall of the large cement bin when the wear-resistant material is not filled in fig. 2 and the schematic structural diagram of a storage bin arranged in a square shape in fig. 3 when viewed from the top of the coke bin upper end feed inlet) the baffle 11 is fixedly installed along the periphery of the damaged area of the bin wall 7 of the large cement bin, the baffle 11 is preferably installed by welding to ensure the installation firmness, and the installation height of the baffle 11 is greater than the installation thickness of the undamaged bin wall, so that the storage bin is formed in the damaged area. Therefore, the coke bin with the insufficient thickness of the bin wall of the hopper can be effectively repaired by pouring the wear-resistant material into the storage bin, and the application range of the repairing mode provided by the invention is further expanded; in addition, the baffle plate is arranged, so that the wear-resistant material is more firmly fixed in a damaged area, the problem that the wear-resistant material with certain thickness falls off in a large area is effectively avoided, and the service life of the repaired bin wall is further prolonged. In addition, the storage bin is not limited to be arranged in a square structure, and can be any conformal structure which is matched with a corresponding damaged area, and the functional realization of the design device is not influenced.
Specifically, when the baffle 11 is fixedly installed, the baffle 11 is preferably arranged perpendicular to the installation base plate 10, so as to achieve the technical effect of forming the maximum storage capacity by using as little baffle material as possible, and ensure the best storage effect.
Further, when the baffle 11 is fixedly installed, a plurality of second anchoring nails 5 are further bound on the outer side of the storage bin, higher than the undamaged bin wall, of the baffle 11. These second anchor nail 5 set up can further increase abrasive material 1 and be fixed in the restoration area of hopper bulkhead 7 to can make the restoration region that whole abrasive material 1 formed no longer be well-defined structure, but form certain whereabouts radian in the edge, rounding off, thereby make the coke that drops in abrasive material 1 top, the landing can be smooth, avoid piling up, also effectively avoided the coke to form in the periphery of storage silo simultaneously and piled up the dead angle.
Further, when the baffle 11 is fixedly installed, the wear-resistant welding meat 6 is coated and arranged in the area where the baffle 11 is in direct contact with the wear-resistant material 1. So set up, can prevent effectively that wear-resisting material 1 is direct to cause the quick wearing and tearing of baffle 11 with 11 rubbing action of baffle, and then prolong the life of baffle 11.
The invention also discloses a repair structure of the large cement product hopper wall, which comprises the following components: the device comprises a covering device, a fixing device and a material storage device; wherein, the covering device comprises a mounting bottom plate 10 for covering the damaged area of the hopper bin wall 7; the fixing device comprises a plurality of first anchoring nails 3 which are fixedly arranged on the mounting base plate 10 and used for fixing a wear-resistant material 1 with a certain thickness; and wherein the wear resistant material 1 comprises: blends of abrasion resistant particles with adhesives, and other types of any strong abrasion resistant and strong curing product; the storage device may be a pit formed between the hopper wall 7 and the mounting base plate 10, or may be a storage bin formed in the damaged area by fixedly disposing a baffle plate 11 adjacent to the undamaged wall along the outer periphery of the damaged area of the hopper wall 7 and by making the height of the baffle plate 11 larger than the thickness of the undamaged wall.
Specifically, the storage bin can be arranged in a square shape, and as shown in fig. 3, the storage bin can also be adjusted and repaired according to actual damage conditions.
Specifically, the wear resistant particles include, but are not limited to, diamond. Other materials with hardness higher than that of coke and concrete are all within the protection scope of the invention.
Specifically, the baffle 11 is preferably arranged perpendicular to the mounting base plate 10 and fixed to the mounting base plate 10 by welding, such as the weld 13 shown in fig. 5, to ensure that the baffle 11 on the inclined bin wall has excellent bearing capacity. In addition, as shown in fig. 4, the baffle plates 11 are all provided with a plurality of reinforcing steel bar placing holes 12 for accommodating the reinforcing steel bars 2 exposed from the damaged hopper wall. These exposed original reinforcing bar 2 structures still can regard as the fixed point position when baffle 11 installs, all carry out welded connection with the contact site of baffle 11 and each reinforcing bar 2, can further consolidate the fastness of making the storage silo.
Specifically, the first anchor nails 3 are also preferably arranged in directions perpendicular to the mounting baseplate 10.
Specifically, the first anchoring nails 3 are preferably arranged at equal intervals.
Furthermore, a plurality of second anchoring nails 5 are arranged on the baffle 11 at the outer side of the storage bin higher than the undamaged bin wall.
Further, the area of the baffle 11 in direct contact with the wear-resistant material 1 is coated with the wear-resistant weld meat 6.
In summary, according to the method and the structure for repairing the hopper wall of the large cement product, the mounting bottom plate is arranged in the damaged area of the hopper wall, the anchoring nails for fixing the wear-resistant material with a certain thickness are arranged on the mounting bottom plate, the wear-resistant material is mixed by the high-strength wear-resistant particles and the adhesive and then filled in the pit (namely the damaged area of the hopper wall) formed between the hopper wall with a certain thickness and the mounting bottom plate, and the damaged area of the hopper wall can be repaired after the adhesive is fully cured. The bin wall repaired by the repairing method has stronger wear resistance after being cured by large-particle wear-resistant materials, and simultaneously has good buffering and damping effects and rubber rebound force, thereby reducing the impact damage of coke on the bin wall, realizing the durable repair of the bin wall of the large cement product hopper, obviously prolonging the service life of the bin wall, reducing the workload of cleaning posts and the difficulty of field customization management, and improving the coking efficiency while ensuring the long-term stable operation of the coking process. In addition, the storage bin is formed in the bin wall damaged area by arranging the baffle plate close to the undamaged bin wall at the periphery of the damaged area of the bin wall of the hopper and setting the height of the baffle plate to be larger than the thickness of the bin wall of the hopper. Therefore, the coke bin with the insufficient thickness of the bin wall of the hopper can be effectively repaired by pouring the wear-resistant material into the storage bin, and the application range of the repairing mode provided by the invention is further expanded; in addition, the baffle plate is arranged, so that the wear-resistant material is more firmly fixed in a damaged area, the problem that the wear-resistant material with a certain thickness falls off in a large area is effectively avoided, and the service life of the repaired bin wall is further prolonged.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (12)
1. A method of repairing a large cement product hopper wall, the method comprising:
arranging a mounting bottom plate (10) in a damaged area of a hopper bin wall (7) to cover the damaged area;
binding a plurality of first anchoring nails (3) for fixing a certain thickness of wear-resistant material (1) on the installation bottom plate (10), wherein the wear-resistant material (1) comprises: a blend of wear resistant particles and an adhesive;
and filling the wear-resistant material (1) into a pit area formed between the hopper bin wall (7) with a certain thickness and the mounting base plate (10), and finishing repairing the damaged area of the hopper bin wall (7) after the adhesive is cured.
2. The method for repairing a large cement product hopper wall according to claim 1,
the method further comprises the following steps: and fixedly mounting a baffle (11) along the periphery of the damaged area of the hopper bin wall (7) close to the undamaged bin wall, wherein the setting height of the baffle (11) is greater than the setting thickness of the undamaged bin wall, so that a storage bin is formed in the damaged area.
3. The method for repairing a large cement product hopper wall according to claim 2, wherein the baffle (11) is disposed perpendicular to the mounting base plate (10) when the baffle (11) is fixedly mounted.
4. The method for repairing a large cement product hopper wall according to claim 1 or 2,
when the first anchoring nails (3) are bound, the arrangement directions of the first anchoring nails (3) are all perpendicular to the installation bottom plate (10).
5. The method for repairing a large cement product hopper wall according to claim 2 or 3,
when the baffle (11) is fixedly installed, a plurality of second anchoring nails (5) are further bound on the baffle (11) at the outer side of the storage bin higher than the wall of the unbroken bin.
6. The method for repairing a large cement product hopper wall according to claim 1 or 2,
the wear resistant particles include, but are not limited to, diamond.
7. The method for repairing a large cement product hopper wall according to claim 1 or 2,
when the first anchoring nails (3) are bound, a plurality of the first anchoring nails (3) are arranged at equal intervals.
8. The method for repairing a large cement product hopper wall according to claim 2,
when the baffle (11) is fixedly installed, the wear-resistant welding meat (6) is coated and arranged in the area where the baffle (11) is in direct contact with the wear-resistant material (1).
9. A repair structure for a large cement product hopper wall, the structure comprising:
a covering device comprising a mounting base plate (10) for covering a region of failure of a hopper wall (7);
the fixing device comprises a plurality of first anchoring nails (3) which are fixedly arranged on the mounting base plate (10) and used for fixing the wear-resistant material (1) with a certain thickness; wherein the wear resistant material (1) comprises: a blend of wear resistant particles and an adhesive;
the storage device comprises a hopper bin wall (7) with a certain thickness and a pit formed between the mounting bottom plates (10).
10. A repair structure for a large cement product hopper wall according to claim 9,
the storing device further comprises a baffle (11) fixedly arranged on the periphery of the damaged area of the hopper bin wall (7) close to the undamaged bin wall, and the height of the baffle (11) is larger than the thickness of the undamaged bin wall.
11. The repair structure for a large cement product hopper wall according to claim 10,
and a plurality of second anchoring nails (5) are arranged on the baffle (11) and positioned at the outer side of the storage bin higher than the undamaged bin wall.
12. The repair structure of a large cement product hopper wall according to claim 10 or 11,
the area of the baffle (11) in direct contact with the wear-resistant material (1) is coated with wear-resistant welding meat (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210691036.3A CN115110795A (en) | 2022-06-17 | 2022-06-17 | Method and structure for repairing hopper wall of large cement product |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210691036.3A CN115110795A (en) | 2022-06-17 | 2022-06-17 | Method and structure for repairing hopper wall of large cement product |
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