CN117418057A - Device for controlling masonry quality of carbon bricks for overhauling blast furnace and application method of device - Google Patents
Device for controlling masonry quality of carbon bricks for overhauling blast furnace and application method of device Download PDFInfo
- Publication number
- CN117418057A CN117418057A CN202311269284.XA CN202311269284A CN117418057A CN 117418057 A CN117418057 A CN 117418057A CN 202311269284 A CN202311269284 A CN 202311269284A CN 117418057 A CN117418057 A CN 117418057A
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- China
- Prior art keywords
- blast furnace
- carbon brick
- control device
- carbon
- masonry quality
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 135
- 239000011449 brick Substances 0.000 title claims abstract description 135
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 135
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000003908 quality control method Methods 0.000 claims description 31
- 238000012423 maintenance Methods 0.000 claims description 30
- 230000003014 reinforcing effect Effects 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 12
- 238000005259 measurement Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/24—Test rods or other checking devices
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Blast Furnaces (AREA)
Abstract
The invention provides a device for controlling the masonry quality of a carbon brick for overhauling a blast furnace and a use method thereof. The device comprises: the two supporting plates are arranged in parallel up and down at intervals and used as auxiliary supporting measuring plates so as to be supported in the space of the removed broken carbon bricks and can measure gaps by taking the space as a reference; the stand columns are arranged between the two supporting plates at intervals, and two ends of each stand column are respectively connected with the two supporting plates and used for supporting the two supporting plates. According to the invention, the device is used as a carbon brick to be placed at a carbon brick dismantling position, gap comparison is carried out, and then gap dimension measurement is carried out, so that the accurate dimension of the gap is obtained, the dimension of the upper and lower gaps of the carbon brick is adjusted, subsequent construction is carried out, the labor intensity is reduced, the labor cost is saved, and the construction quality is improved.
Description
Technical Field
The invention relates to the technical field of metallurgical construction, in particular to a device for controlling the masonry quality of a carbon brick for overhauling a blast furnace.
Background
When many domestic constructors are overhauled on carbon bricks of the blast furnace wall at present, when the fact that the carbon bricks of the inner ring of the furnace wall are eroded for a long time is found, as shown in figure 1, the carbon bricks are damaged, and the intact carbon bricks 1' and the damaged carbon bricks 2' on the blast furnace wall are usually maintained by directly removing the damaged carbon bricks 2' and then re-building new carbon bricks, so that the carbon bricks cannot be completely replaced; in the process of replacing the carbon bricks, the gaps on the upper and lower sides of the carbon bricks are required to be detected and filled, in order to prolong the service life of the carbon bricks, the upper and lower filling gaps are required to be uniformly arranged (the heights of the gaps are the same) in the filling process, and the phenomenon that the furnace shells are heated unevenly due to the fact that the heat transfer amounts of the upper and lower gaps are different is avoided.
However, steel tape is generally used to measure the size of the filling gap, and the height of the carbon brick is subtracted from the total height, namely the gap height; the detection method has lower accuracy.
In addition, the carbon bricks are manually conveyed and placed at the gaps, and then the gap size is detected by adopting a checking tool such as a feeler gauge, so that the manual labor intensity is high due to the fact that the weight of the carbon bricks is heavy.
Disclosure of Invention
In view of the above, the invention provides a device for controlling the masonry quality of a blast furnace overhaul carbon brick and a use method thereof, and aims to solve the problems of low accuracy and low efficiency of carbon brick gap measurement during the partial overhaul of the existing blast furnace wall carbon brick.
In one aspect, the invention provides a device for controlling the masonry quality of a carbon brick for overhauling a blast furnace, which comprises: the two supporting plates are arranged in parallel up and down at intervals and used as auxiliary supporting measuring plates so as to be supported in the space of the removed broken carbon bricks and can measure gaps by taking the space as a reference; the stand columns are arranged between the two supporting plates at intervals, and two ends of each stand column are respectively connected with the two supporting plates and used for supporting the two supporting plates.
Further, according to the quality control device for building the carbon bricks for overhauling the blast furnace, diagonal bracing is arranged between any two adjacent upright posts, and the diagonal bracing is positioned in square spaces surrounded by the two support plates and the two upright posts.
Further, according to the quality control device for building the carbon bricks for overhauling the blast furnace, two diagonal braces are arranged between any two adjacent upright posts, and the two diagonal braces are arranged in square spaces surrounded by the two supporting plates and the two upright posts in a crossing mode.
Further, according to the blast furnace overhaul carbon brick masonry quality control device, the inclined struts are obliquely arranged between the two upright posts, and two ends of the inclined struts are respectively connected to the two upright posts.
Further, in the device for controlling the masonry quality of the carbon bricks for overhauling the blast furnace, reinforcing ribs are arranged between any two upright posts; and/or the wall surface of each supporting plate facing the other supporting plate is provided with a reinforcing rib.
Further, according to the blast furnace maintenance carbon brick masonry quality control device, the reinforcing ribs are arranged in parallel with the supporting plates, and two ends of the reinforcing ribs are respectively connected with the two upright posts.
Further, according to the blast furnace maintenance carbon brick masonry quality control device, the distance between the top wall of the supporting plate positioned above and the bottom wall of the supporting plate positioned below is matched with the thickness of the carbon brick.
On the other hand, the invention provides a using method of the blast furnace maintenance carbon brick masonry quality control device, which comprises the following steps: placing the blast furnace maintenance carbon brick masonry quality control device in the space of the removed broken carbon bricks; measuring the gap height of a position of a blast furnace maintenance carbon brick masonry quality control device filled in the space of the removed damaged carbon bricks; and determining the upper and lower gaps of the carbon bricks according to the principle of equal division of the upper and lower height gaps, thereby determining the thickness of the filled ash.
Further, the application method of the blast furnace maintenance carbon brick masonry quality control device adopts a feeler gauge to measure the gap height of the blast furnace maintenance carbon brick masonry quality control device filled in the dismantled space of the broken carbon bricks.
According to the blast furnace maintenance carbon brick masonry quality control device and the application method thereof, the device is placed as the carbon brick at the carbon brick dismantling position, gap comparison is carried out, and then gap size measurement is carried out, so that the accurate size of the gap is obtained, the size of the upper gap and the lower gap of the carbon brick is adjusted, subsequent construction is carried out, labor intensity is reduced, labor cost is saved, construction quality is improved, compared with the prior art that the carbon brick is directly placed and measured, because the carbon brick is heavier, the carbon brick is inconvenient to directly place, the device is simple in structure, light in weight, good in stability and convenient to operate, the use field is not influenced by environment and geographical space, the gap measurement is convenient, the measurement accuracy is ensured, the problems of low accuracy and low efficiency of the gap measurement of the carbon brick of the blast furnace wall during the partial maintenance are effectively solved, and the working efficiency is improved; gaps among the carbon bricks can be measured rapidly and accurately, and the sizes of the gaps of all layers are determined, so that the construction efficiency and the construction quality are improved. The device also has the following technical effects:
1. when the device is matched with maintenance, the locally damaged carbon bricks are detached, and the installation gap between the carbon bricks can be accurately ensured within the allowable tolerance range.
2. No external power source is needed, the volume is small, and the tool structure is simple.
3. And when the blast furnace is overhauled, the gap size is simulated and measured by placing the carbon bricks, so that the working efficiency is high, and the labor and the cost are saved.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
FIG. 1 is a schematic view of a blast furnace wall structure in which a carbon brick provided in the prior art is eroded for a long period of time to produce broken carbon bricks;
FIG. 2 is a schematic structural view of a device for controlling the masonry quality of a carbon brick for overhauling a blast furnace, which is provided by the embodiment of the invention;
FIG. 3 is a schematic structural view of a use state of a device for controlling the masonry quality of a carbon brick for overhauling a blast furnace according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a method for using the device for controlling the quality of building the carbon bricks for overhauling the blast furnace according to the embodiment of the invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
Device example:
referring to fig. 2 to 3, preferred structures of the blast furnace maintenance carbon brick masonry quality control device provided by the embodiment of the invention are shown. As shown, the apparatus 100 includes: two support plates 1 and a plurality of upright posts 2; wherein,
the two support plates 1 are arranged in parallel up and down and at intervals for supporting the measuring plates as auxiliary supports to be supported in the space of the removed broken carbon brick and to be able to measure the gap as a reference. Specifically, the support plate 1 may be a steel plate structure, but may be made of other materials, and the present embodiment is not limited thereto. The two support plates 1 are arranged in parallel up and down and at intervals, for example, can be horizontally placed so as to be supported in the space of the removed broken carbon bricks, and can be used for measuring gaps by taking the broken carbon bricks as references, so that the blast furnace maintenance carbon brick masonry quality control device is used as an auxiliary measuring tool to measure the gaps, the two support plates 1 are respectively used as the top wall and the bottom wall of the auxiliary measuring carbon bricks, the whole device is supported and positioned, and the gap measuring tools such as a feeler gauge can be supported and positioned by taking the support plate 1 positioned above as references, so that the carbon brick gaps are measured. Wherein the length of the support plate 1 is smaller than or equal to the length of one carbon brick, so that the device can be integrally plugged into the space of the removed broken carbon brick, and the carbon brick can be replaced for measuring the gap. Wherein, the surface of the supporting plate 1 is subjected to metal processing, so that the precision is strictly kept, and the accuracy of measurement is ensured.
A plurality of columns 2 are arranged between the two support plates 1 at intervals, and two ends (upper and lower ends as shown in fig. 2) of each column 2 are respectively connected with the two support plates 1 for supporting the two support plates 1. Specifically, stand 2 is two at least, and each stand 2 is all vertical to be set up two between the backup pad 1 promptly perpendicular to backup pad 1 to, the interval sets up between the stand 2, with the connection stability between guaranteeing two backup pads 1, and then ensures the device and places the steadiness in the space of broken carbon brick that has demolishd, thereby ensures gap measurement's accuracy. In the present embodiment, the number of the columns 2 is four, but other numbers are also possible, and the number of the columns is not limited in the present embodiment. The support plate 1 located above can be supported by the upright posts 2, so that the support plate 1 located above can be supported above the support plate 1 located below at intervals, and the interval between the two support plates 1 can be ensured, so that the gap measurement can be conveniently performed. The upright post 2 may be a square tube upright post, but the cross section of the upright post may be other structures, and the cross section is not limited in this embodiment.
In this embodiment, the distance between the top wall of the support plate 1 located above and the bottom wall of the support plate 1 located below is adapted to the thickness of the carbon brick, that is, the thickness of the device is adapted to the thickness of the carbon brick, so that after the device is placed in the space of the removed broken carbon brick, the gap in the space is the thickness of the gap in which the carbon brick is placed, and the size of the gap is convenient to determine. Of course, in other embodiments, the space between the top wall of the upper support plate 1 and the bottom wall of the lower support plate 1 may be other dimensions, and only the adaptive calculation is needed. For example, the space between the top wall of the upper support plate 1 and the bottom wall of the lower support plate 1 is H, the device gap of the device placed in the space of the removed broken carbon bricks is a, the thickness of the carbon bricks is b, the carbon brick gap l=h+a-b, and the upper and lower gaps of the carbon bricks are L/2, that is, the thickness of the filling ash is L/2. When the distance between the top wall of the supporting plate 1 positioned above and the bottom wall of the supporting plate 1 positioned below is matched with the thickness of the carbon bricks, namely h=b, if the gap of the carbon bricks needs to be calculated by using a formula, the gap is a device gap which is directly placed in the space of the removed damaged carbon bricks for the device, and the calculation is convenient and simple.
With continued reference to fig. 2, in order to improve the stability of the device, preferably, diagonal braces 3 are disposed between any two adjacent upright posts 2, and the diagonal braces 3 are located in square spaces enclosed by the two support plates 1 and the two upright posts 2. Specifically, the diagonal brace 3 is obliquely disposed between the two upright posts 2, and both ends of the diagonal brace 3 are connected with the two upright posts 2, respectively. In this embodiment, in order to further improve stability of the device, it is further preferred that two diagonal braces 3 are disposed between any two adjacent columns 2, the two diagonal braces 3 are disposed in square spaces enclosed by the two support plates 1 and the two columns 3 in a crossing manner, that is, the two diagonal braces 3 disposed between any two adjacent columns 2 are disposed between the two columns 2 in an inclined manner according to opposite directions, and two ends of the two diagonal braces 3 are respectively connected to the two columns 2. The diagonal brace 3 may be a square tube diagonal brace, but of course, the cross section of the diagonal brace may also be other structures, and the diagonal brace is not limited in this embodiment.
With continued reference to fig. 2, in order to increase the stability of the support plates 1, it is preferable that the wall surface of each support plate 1 facing the other support plate 1, that is, the bottom wall of the support plate 1 located above and the top wall of the support plate 1 located below, be provided with a reinforcing rib 4 provided between the columns 2, and that the reinforcing rib 4 be disposed parallel to the support plates 1, and that both ends of the reinforcing rib 4 be connected to two of the columns 2, respectively. In this embodiment, a reinforcing rib 4 is further disposed between any two of the columns 2, and the reinforcing rib 4 is located on a wall surface of the support plate 1 facing the other support plate 1, so that the support plate 1 and the columns 2 can be reinforced.
In summary, the device for controlling the masonry quality of the carbon bricks for overhauling the blast furnace provided by the embodiment is used for placing the device as the carbon bricks at the carbon brick dismantling position, carrying out gap comparison and then carrying out gap dimension measurement, thereby obtaining the accurate dimension of the gap, adjusting the dimension of the gap between the upper part and the lower part of the carbon bricks, carrying out subsequent construction, reducing the labor intensity, saving the labor cost, improving the construction quality, compared with the prior art, which directly uses the carbon bricks for placing and measuring, because the carbon bricks are heavier in weight and inconvenient to directly place, the device has the advantages of simple structure, light weight, good stability and convenient operation, is not influenced by environment and geographical space in use field, is convenient for measuring the gap, ensures the measuring accuracy, can effectively solve the problems of low measuring accuracy and low efficiency of the gap of the carbon bricks of the blast furnace wall when the carbon bricks are locally overhauled, and improves the working efficiency; gaps among the carbon bricks can be measured rapidly and accurately, and the sizes of the gaps of all layers are determined, so that the construction efficiency and the construction quality are improved. The device also has the following technical effects:
1. when the device is matched with maintenance, the locally damaged carbon bricks are detached, and the installation gap between the carbon bricks can be accurately ensured within the allowable tolerance range.
2. No external power source is needed, the volume is small, and the tool structure is simple.
3. And when the blast furnace is overhauled, the gap size is simulated and measured by placing the carbon bricks, so that the working efficiency is high, and the labor and the cost are saved.
Method embodiment:
referring to fig. 4, a schematic structural diagram of a method for confirming a construction gap of a carbon brick for overhauling a blast furnace according to an embodiment of the invention is shown. As shown, the method comprises the steps of:
step S1, placing the blast furnace maintenance carbon brick masonry quality control device in a space of the removed broken carbon bricks.
Specifically, first, broken carbon bricks 300 are removed, and intact carbon bricks 200 are kept motionless; then, the above-mentioned blast furnace maintenance carbon brick masonry quality control device 100 is placed in the space of the removed broken carbon bricks, and the dimension is controlled in the up-down height direction, at this time, the support plate 1 located below may be supported on the carbon bricks at the bottom, and a gap, that is, a device gap, is provided between the top wall of the support plate 1 located above and the carbon bricks located above.
And S2, measuring the gap height of the position of the blast furnace maintenance carbon brick masonry quality control device filled in the dismantled space of the broken carbon bricks.
Specifically, a clearance gauge can be adopted to measure the clearance height of the position of the blast furnace maintenance carbon brick masonry quality control device filled in the space of the removed broken carbon bricks, namely the clearance height a of the position of the measuring device. And the dimension of the height space position can be accurately measured according to the gap height a of the measuring device, the dimension L of the gap is obtained after subtracting the dimension of the height of the carbon brick, namely the gap L=H+a-b of the carbon brick is utilized to calculate the gap of the carbon brick.
And S3, determining the upper and lower gaps of the carbon bricks according to the principle of equipartition of the upper and lower height gaps, so as to determine the thickness of the filled ash.
Specifically, according to the principle of equal division of the upper and lower height gaps, the upper and lower gaps are L/2 respectively, so that the thickness of the filled ash is determined, the upper and lower uniformity of the carbon brick gaps is ensured, and the heat loss caused by overlarge upper and lower certain gaps is avoided.
The specific implementation process of the device 100 for controlling the masonry quality of the carbon bricks for overhauling the blast furnace is described above, and the embodiment is not described herein again.
Since the blast furnace maintenance carbon brick masonry quality control device 100 has the above effects, the method of using the blast furnace maintenance carbon brick masonry quality control device 100, namely the blast furnace maintenance carbon brick masonry quality control method, also has corresponding technical effects.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
1. The utility model provides a blast furnace overhauls carbon brick masonry quality controlling means which characterized in that includes:
the two supporting plates are arranged in parallel up and down at intervals and used as auxiliary supporting measuring plates so as to be supported in the space of the removed broken carbon bricks and can measure gaps by taking the space as a reference;
the stand columns are arranged between the two supporting plates at intervals, and two ends of each stand column are respectively connected with the two supporting plates and used for supporting the two supporting plates.
2. The blast furnace maintenance carbon brick masonry quality control device according to claim 1, wherein,
and inclined struts are arranged between any two adjacent upright posts, and are positioned in square spaces surrounded by the two support plates and the two upright posts.
3. The blast furnace maintenance carbon brick masonry quality control device according to claim 2, wherein,
the diagonal bracing that sets up between arbitrary adjacent two the stand is two, two the diagonal bracing alternately sets up two the backup pad with in the square space that the stand encloses.
4. The blast furnace maintenance carbon brick masonry quality control device according to claim 2, wherein,
the diagonal bracing is obliquely arranged between the two upright posts, and two ends of the diagonal bracing are respectively connected to the two upright posts.
5. The blast furnace maintenance carbon brick masonry quality control device according to any one of the claim 1 to 4, wherein,
a reinforcing rib is arranged between any two upright posts; and/or the wall surface of each supporting plate facing the other supporting plate is provided with a reinforcing rib.
6. The blast furnace maintenance carbon brick masonry quality control device according to claim 5, wherein,
the reinforcing ribs are arranged in parallel with the supporting plates, and two ends of each reinforcing rib are connected with the two upright posts respectively.
7. The blast furnace maintenance carbon brick masonry quality control device according to any one of the claim 1 to 4, wherein,
the spacing between the top wall of the support plate positioned above and the bottom wall of the support plate positioned below is matched with the thickness of the carbon brick.
8. The blast furnace maintenance carbon brick masonry quality control device according to any one of the claim 1 to 4, wherein,
the backup pad is steel sheet structure, the stand is square pipe stand structure.
9. The application method of the device for controlling the masonry quality of the carbon bricks for overhauling the blast furnace is characterized by comprising the following steps of:
placing the blast furnace service carbon brick masonry quality control device according to any one of claims 1 to 8 in the space of the removed broken carbon brick;
measuring the gap height of a position of a blast furnace maintenance carbon brick masonry quality control device filled in the space of the removed damaged carbon bricks;
and determining the upper and lower gaps of the carbon bricks according to the principle of equal division of the upper and lower height gaps, thereby determining the thickness of the filled ash.
10. The method for using the blast furnace maintenance carbon brick masonry quality control device according to claim 9, wherein,
and measuring the gap height of the position of the blast furnace maintenance carbon brick masonry quality control device filled in the dismantled space of the broken carbon bricks by adopting a feeler gauge.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202311269284.XA CN117418057A (en) | 2023-09-28 | 2023-09-28 | Device for controlling masonry quality of carbon bricks for overhauling blast furnace and application method of device |
Applications Claiming Priority (1)
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CN202311269284.XA CN117418057A (en) | 2023-09-28 | 2023-09-28 | Device for controlling masonry quality of carbon bricks for overhauling blast furnace and application method of device |
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Publication Number | Publication Date |
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CN117418057A true CN117418057A (en) | 2024-01-19 |
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ID=89523860
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN202311269284.XA Pending CN117418057A (en) | 2023-09-28 | 2023-09-28 | Device for controlling masonry quality of carbon bricks for overhauling blast furnace and application method of device |
Country Status (1)
Country | Link |
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CN (1) | CN117418057A (en) |
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2023
- 2023-09-28 CN CN202311269284.XA patent/CN117418057A/en active Pending
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