CN114350871A - Novel hearth cooling structure and mounting method thereof - Google Patents
Novel hearth cooling structure and mounting method thereof Download PDFInfo
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- CN114350871A CN114350871A CN202210029926.8A CN202210029926A CN114350871A CN 114350871 A CN114350871 A CN 114350871A CN 202210029926 A CN202210029926 A CN 202210029926A CN 114350871 A CN114350871 A CN 114350871A
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- 238000001816 cooling Methods 0.000 title claims abstract description 128
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000011819 refractory material Substances 0.000 claims abstract description 29
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 25
- 238000009434 installation Methods 0.000 claims abstract description 21
- 239000011449 brick Substances 0.000 claims abstract description 19
- 238000003466 welding Methods 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 10
- 238000009826 distribution Methods 0.000 claims description 8
- 239000002002 slurry Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 5
- 238000005266 casting Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000003575 carbonaceous material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000036314 physical performance Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/10—Cooling; Devices therefor
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- 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 discloses a novel hearth cooling structure and an installation method thereof, relating to the technical field of blast furnace cooling structures; the invention is arranged at the periphery of the carbon brick of the blast furnace hearth, and comprises an inner furnace shell and an outer furnace shell which are fixedly connected through a plurality of fixing pieces; a plurality of water-cooling pipes are laid between the inner furnace shell and the outer furnace shell, and heat-conducting refractory materials are filled outside the water-cooling pipes; two ends of each water-cooling pipe are respectively arranged at the outer sides of the upper end and the lower end of the furnace hearth cooling structure; the installation method comprises the steps of fixedly installing an inner furnace shell along the periphery of a blast furnace hearth; welding a water-cooled tube and a fixing piece to one side of the inner furnace shell, which is far away from the hearth; the outer furnace shell is arranged on one side of the inner furnace shell, which is far away from the hearth, and is provided with a preset pipe hole or a pipe hole during installation, so that the end part of the water-cooling pipe penetrates through the outer furnace shell; filling heat-conducting refractory materials between the inner furnace shell and the outer furnace shell and tamping; the invention has the advantages of simple and reasonable structure, low cost, convenient and quick installation and good cooling effect.
Description
Technical Field
The invention relates to the technical field of blast furnace cooling structures, in particular to a novel hearth cooling structure and an installation method thereof.
Background
The cooling structure of the traditional blast furnace hearth is the same as and different from the inside of the furnace to the outside of the furnace: the structure of the common cooling wall is disclosed in the specification of the invention patent with the publication number of CN1067105C, namely the cooling wall of the side wall of the blast furnace and the manufacturing and using methods thereof, wherein the specification comprises carbon bricks, a carbon stoking layer, a wall body of the cooling wall, a gap layer between the wall body and a water pipe and the water pipe: carbon refractory bricks are layered inside the blast furnace. And a stamping refractory material, a cooling wall and a pouring refractory material are arranged between the carbon refractory brick layer and the furnace shell. Refractory bricks are stacked on the hearth bottom of the blast furnace, and cooling pipes are also provided on the hearth bottom to cool the hearth side wall of the blast furnace through a stave.
The cooling wall plays a central role in heat conduction in the cooling structure of the blast furnace hearth. The high-efficiency work of the cooling wall can not be avoided in the safe production of the blast furnace, the high efficiency of the cooling wall is kept, the cooling wall has strong cooling capacity, the base metal of the cooling wall has good mechanical property, and the internal structure of the cooling wall is reasonable.
At present, the cooling wall used at the hearth part is mainly a cast iron cooling wall, and the cast iron cooling wall has the following defects: 1) an air gap layer and an anti-seepage carbon layer are arranged between a cast iron base material and an internal cooling water pipe, so that heat cannot be conducted out, huge thermal resistance exists in the internal of the cast iron base material, the physical performance of a wall body of a cast part is poor, and although the improvement is also researched and improved, for example, the invention is disclosed as CN101634523B and named as a casting method of a cast steel cooling wall, but the general manufacturing process is complex; 2) the carbon pounding material layer between the cooling wall and the carbon brick also has great influence on the whole heat conducting system; 3) the cooling walls are required to be arranged in blocks in the furnace, and a cooling blind area about 200mm is formed at the joint of the two cooling walls; 4) a furnace shell is provided with a plurality of holes for water inlet and outlet of the cooling wall, so that the strength and the sealing property of the furnace shell are weakened, and the positions of the holes are inconvenient to arrange; the invention patent with the publication number CN104236313B, entitled transverse staggered arrangement method of cooling walls of iron making furnace, discloses the existing block arrangement and the improved block arrangement, wherein the problems in the above 3) and 4) also exist. Therefore, a new hearth cooling structure and a method for installing the same are needed to solve these problems.
Disclosure of Invention
The invention aims to provide a novel hearth cooling structure and an installation method thereof, and aims to solve the problems of low heat transfer efficiency, complex design structure, difficult installation and high investment of a hearth cooling wall.
In order to achieve the purpose, the invention provides the following technical scheme: a novel hearth cooling structure is arranged at the periphery of a blast furnace hearth carbon brick and comprises an inner furnace shell and an outer furnace shell which are fixedly connected through a plurality of fixing pieces; a plurality of water-cooling pipes are laid between the inner furnace shell and the outer furnace shell, and heat-conducting refractory materials are filled outside the water-cooling pipes; the two ends of each water-cooling pipe are respectively arranged at the outer sides of the upper end and the lower end of the furnace hearth cooling structure.
Preferably, the outer furnace shell is formed by combining a plurality of layers distributed from bottom to top, and in two adjacent layers, the upper end surface of the lower layer is closely arranged with the lower end surface of the upper layer.
Preferably, the fixing piece is a plurality of bolts or screws, one end of the fixing piece is welded with one side, away from the hearth, of the inner furnace shell, the two ends of the fixing piece are perpendicular to each other, a through hole is formed in the corresponding position of the outer furnace shell, the other end of the fixing piece penetrates through the through hole, and a nut is installed on one side, away from the hearth, of the outer furnace shell in a threaded mode.
Preferably, the water-cooling pipe is a whole seamless straight-through pipe arranged along one side surface of the inner furnace shell far away from the hearth, and the upper end and the lower end of the outer furnace shell are provided with pipe distribution holes respectively used for the water inlet end and the water outlet end of the water-cooling pipe to pass through; the plurality of water-cooling pipes are distributed in a circumferential array along one side surface of the inner furnace shell far away from the furnace hearth by taking the central line of the furnace hearth as an axis.
Preferably, the lower ends of the inner and outer furnace shells and the water cooling tubes extend to the lower end of the outer side of the blast furnace bottom.
Preferably, the heat-conducting refractory material is a high-heat-conducting carbonaceous ramming mass.
The installation method of the novel hearth cooling structure comprises the following specific steps:
s1, fixedly installing an inner furnace shell along the periphery of the blast furnace hearth;
s2, welding the water-cooled tube and the fixing piece to one side of the inner furnace shell, which is far away from the hearth;
s3, mounting an outer furnace shell on one side of the inner furnace shell, which is far away from the hearth, wherein a pipe distribution hole is preset on the outer furnace shell or is formed during mounting, and the end part of the water-cooling pipe penetrates through the outer furnace shell;
and S4, filling heat-conducting refractory materials between the inner furnace shell and the outer furnace shell and tamping.
Preferably, step S2 further includes: meanwhile, the hearth carbon bricks are built along one side of the inner hearth shell close to the inside of the hearth, and the inner hearth shell is tightly connected with the hearth carbon bricks through building slurry.
Preferably, the outer shell is formed by combining a plurality of layers, the upper end surface of the lower layer is abutted against the lower end surface of the upper layer in two adjacent layers, the outer shell is installed in layers from bottom to top in the step S3, and the step S4 of filling heat-conducting refractory material and tamping is performed once each layer is installed.
Preferably, the fixing pieces are bolts or screws and are provided with a plurality of bolts or screws, one end of each fixing piece is welded with one side of the inner furnace shell, which is far away from the hearth, and the fixing pieces are arranged vertically, through holes are formed in corresponding positions of the outer furnace shell, and the other end of each fixing piece penetrates through the through holes and is provided with nuts in a threaded manner on one side of the outer furnace shell, which is far away from the hearth; in the step S3, the outer shell is fixed to the outer periphery of the inner shell by tightening the nut; the above installation method further comprises:
and S5, after the outer furnace shell is installed and the heat-conducting refractory material is filled and tamped, screwing the nut again for compacting the heat-conducting refractory material for the second time.
Compared with the prior art, the invention has the beneficial effects that:
1. this novel hearth cooling structure has adopted and has set up the water-cooled tube between the inside and outside two-layer stove outer covering to fill heat conduction refractory material's form, simple structure is reasonable, low cost, and simple to operate is quick, and the cooling effect is good.
2. The novel hearth cooling structure and the installation method thereof avoid the traditional cooling blind area that two cooling walls are connected, the distance between the water pipes can be randomly adjusted, the heat transfer specific surface area is improved, and theoretically, the cooling specific surface area of the novel hearth cooling structure can be close to pi.
3. According to the novel hearth cooling structure and the installation method thereof, the heat conduction links are respectively from inside to outside: the furnace comprises a hearth carbon brick, an inner furnace shell, a heat-conducting refractory material and a water-cooling pipe; the cooling structure of the traditional cooling wall is as follows: the furnace hearth carbon brick, the carbon pounding layer, the cast iron cooling wall body, the air gap layer and the water pipe; the cooling structure of the invention reduces the maximum thermal resistance link-air gap layer in the traditional cooling structure and reduces the most difficult to control influence link-carbon material smashing layer in the furnace, thereby greatly improving the heat transfer efficiency.
4. The novel hearth cooling structure and the installation method thereof can realize the adjustment of the cooling strength at individual positions, and only the arrangement density of the water-cooling pipes in a certain area needs to be changed and/or the material of the water-cooling pipes needs to be adjusted.
5. According to the novel hearth cooling structure and the installation method thereof, the water-cooling pipes are entirely paved between the inner furnace shell and the outer furnace shell, and compared with the water pipes in the cooling wall, the water-cooling pipes are not burnt by a casting process, the quality can be better ensured, the refractory materials in the furnace cannot be influenced even if water leakage and the like occur, and the water-cooling pipes can be replaced at any time, so that the novel hearth cooling structure is safer and more reliable, and is convenient to maintain.
6. The novel hearth cooling structure and the installation method thereof reduce a carbon material pounding layer between a carbon brick and a cooling wall in the traditional furnace, a cooling wall and a casting material layer between the cooling wall and a furnace shell, and optimize the structure in the furnace; the construction of the carbon ramming layer and the furnace shell castable layer in the furnace in the prior art is very difficult, and material gaps are very easy to appear at the two positions, so that conditions are created for the blast furnace gas carrying harmful metals to invade the refractory material of the furnace bottom and the furnace hearth. The cooling structure of the invention well reduces the design of the two links, greatly reduces the construction difficulty and reduces the probability of harmful metal corrosion of refractory materials of the hearth and the hearth.
7. According to the novel hearth cooling structure and the mounting method thereof, the inner furnace shell mainly plays a role in bearing and sealing, but the cooling wall is omitted, so that the inner furnace shell reduces a large number of cooling wall water inlet and outlet pipe openings compared with the traditional furnace shell.
8. The novel hearth cooling structure and the installation method thereof reduce the cooling wall and the auxiliary facilities thereof, reduce the equipment and the construction cost thereof and save the cost.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic diagram of the water tube distribution of the present invention;
fig. 3 is an enlarged view of a point a in fig. 1.
In the figure: 1. an outer furnace shell; 2. an inner furnace shell; 3. a water-cooled tube; 4. a fixing member; 5. a thermally conductive refractory material.
Detailed Description
As shown in fig. 1 to 3, a novel hearth cooling structure is arranged at the periphery of a carbon brick of a blast furnace hearth, and comprises an inner furnace shell 2 and an outer furnace shell 1 which are fixedly connected through a plurality of fixing pieces 4; a plurality of water-cooling tubes 3 are laid between the inner furnace shell 2 and the outer furnace shell 1, and heat-conducting refractory materials 5 are filled outside the water-cooling tubes 3; the two ends of each water-cooling pipe 3 are respectively arranged at the outer sides of the upper end and the lower end of the hearth cooling structure, so that compared with the prior art, the whole arrangement can effectively reduce the cooling blind area, increase the cooling specific surface area and reduce the open pores of the furnace shell; when the furnace shell is installed, an inner furnace shell 2 is fixedly installed along the periphery of a blast furnace hearth, then a water-cooling pipe 3 and a fixing piece 4 are welded to one side, far away from the hearth, of the inner furnace shell 2, an outer furnace shell 1 is installed on one side, far away from the hearth, of the inner furnace shell 2, a pipe distribution hole is preset in the outer furnace shell 1 or is formed during installation, the end part of the water-cooling pipe 3 penetrates through the outer furnace shell 1, and a heat-conducting refractory material 5 is filled between the inner furnace shell 2 and the outer furnace shell 1 and tamped; in addition, after the inner furnace shell 2 is installed, the carbon bricks of the furnace hearth can be built inside the furnace hearth along one side, close to the inside of the furnace hearth, of the inner furnace shell 2 while the water-cooled tube 3 is fixed, the inner furnace shell 2 is tightly connected with the carbon bricks of the furnace hearth through building slurry, heat of the carbon bricks is better transmitted to the inner furnace shell 2, and the inner furnace shell 2 transmits the heat to the water-cooled tube 3 through the heat-conducting refractory material 5.
In a preferred embodiment, the outer furnace shell 1 is formed by combining a plurality of layers which are distributed from bottom to top, in two adjacent layers, the upper end surface of the lower layer is arranged close to the lower end surface of the upper layer, in the embodiment, the outer furnace shell 1 is installed from bottom to top in a layered mode, when one layer is installed, the heat-conducting refractory material 5 is filled and tamped once, if the material is leaked in real time, the outer side between the upper end surface of the lower layer and the lower end surface of the upper layer is pasted with a thin plate for leakage prevention and then tamped in the two adjacent layers, and after all layers are tamped, the thin plates are removed, so that the layers of the outer furnace shell 1 are not fixed mutually and are convenient to detach, later maintenance and replacement of the water cooling pipes 3 are facilitated, especially the water cooling pipes 3 are easy to scale or damage and leak after being used for a long time, and if the layers of the outer furnace shell 1 are determined not needed, the layers can be sealed and welded.
In a preferred embodiment, the fixing member 4 is a plurality of bolts or screws, one end of the fixing member is welded to one side of the inner furnace shell 2 away from the hearth and is arranged perpendicular to the one side, a through hole is formed in the corresponding position of the outer furnace shell 1, the other end of the fixing member 4 penetrates through the through hole, and a nut is installed on one side of the outer furnace shell 1 away from the hearth in a threaded manner; in this embodiment, since the water cooling tube 3 is disposed between the outer furnace shell 1 and the inner furnace shell 2, the outer furnace shell 1 can be fixed to the periphery of the inner furnace shell 2 by tightening the nut, and a gap is left for filling the heat-conducting refractory material 5, and in addition, the nut can be tightened again after the installation is completed for compacting the heat-conducting refractory material 5 for the second time, thereby further improving the overall heat-conducting capability.
Referring to fig. 2, the water-cooling pipe 3 is preferably a whole seamless straight-through pipe arranged along one side surface of the inner furnace shell 2 far away from the hearth, and the upper end and the lower end of the outer furnace shell 1 are provided with pipe distribution holes for respectively passing through the water inlet end and the water outlet end of the water-cooling pipe 3; a plurality of water-cooling pipes 3 can be distributed in a circumferential array along one side surface of the inner furnace shell 2 away from the furnace hearth by taking the center line of the furnace hearth as an axis; the fixing pieces 4 can be arranged in a mode shown in fig. 2, namely 4 water cooling pipes 3 are arranged between the adjacent fixing pieces 4 at the same height, the distance between the adjacent fixing pieces 4 at different heights is about 1.5 times, and the specific requirement is determined according to the size of a blast furnace and the distance design of the adjacent water cooling pipes 3, wherein the smaller the distance between the water cooling pipes 3 is, the better the cooling effect is, but the operation cost is relatively increased.
In a preferred embodiment, the water-cooling tubes 3 are not distributed in a circumferential array, but the cooling intensity adjustment for individual positions can be realized by changing the arrangement density of the water-cooling tubes in a certain area and/or adjusting the material of the water-cooling tubes according to different actual cooling requirements of different positions of the hearth.
As shown in fig. 1, the lower ends of the inner shell 2, the outer shell 1 and the water-cooled tubes 3 extend to the lower end of the outer side of the furnace bottom of the blast furnace, and the lower ends of the inner shell 2 and the furnace bottom can be fixed in advance when the inner shell is installed.
Preferably, the heat-conducting refractory material 5 can be a carbon ramming mass with good heat-conducting property and indefinite shape or other high heat-conducting indefinite-shape bulk materials which are commonly used in the market.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.
The present invention is not described in detail, but is known to those skilled in the art.
Claims (10)
1. The utility model provides a novel hearth cooling structure, sets up in blast furnace hearth carbon brick periphery department, its characterized in that: comprises an inner furnace shell (2) and an outer furnace shell (1), which are fixedly connected through a plurality of fixing pieces (4); a plurality of water-cooling tubes (3) are laid between the inner furnace shell (2) and the outer furnace shell (1), and heat-conducting refractory materials (5) are filled outside the water-cooling tubes (3); two ends of each water-cooling pipe (3) are respectively arranged at the outer sides of the upper end and the lower end of the hearth cooling structure.
2. The novel hearth cooling structure according to claim 1, wherein: the outer furnace shell (1) is formed by combining a plurality of layers which are distributed from bottom to top, and in two adjacent layers, the upper end surface of the lower layer is abutted against the lower end surface of the upper layer.
3. The novel hearth cooling structure according to claim 1, wherein: the fixing piece (4) is a plurality of bolts or screws, one end of the fixing piece is welded with one side, far away from the hearth, of the inner furnace shell (2) and the two ends of the fixing piece are perpendicular to each other, a through hole is formed in the corresponding position of the outer furnace shell (1), the other end of the fixing piece (4) penetrates through the through hole, and a nut is installed on one side, far away from the hearth, of the outer furnace shell (1) in a threaded mode.
4. The novel hearth cooling structure according to claim 1, wherein: the water-cooling pipe (3) is a whole seamless straight-through pipe arranged along one side surface of the inner furnace shell (2) far away from the hearth, and the upper end and the lower end of the outer furnace shell (1) are provided with pipe distribution holes for the water inlet end and the water outlet end of the water-cooling pipe (3) to pass through respectively; the plurality of water cooling pipes (3) are distributed in a circumferential array along one side surface of the inner furnace shell (2) far away from the hearth by taking the central line of the hearth as an axis.
5. The novel hearth cooling structure according to any one of claims 1 to 4, wherein: the lower ends of the inner furnace shell (2), the outer furnace shell (1) and the water cooling pipe (3) extend to the lower end of the outer side of the bottom of the blast furnace.
6. The novel hearth cooling structure according to claim 1, wherein: the heat-conducting refractory material (5) is a high-heat-conducting carbon ramming material.
7. The installation method of the novel hearth cooling structure according to any one of claims 1 to 6, characterized by comprising the following specific steps:
s1, fixedly installing an inner furnace shell (2) along the periphery of the blast furnace hearth;
s2, welding the water-cooling pipe (3) and the fixing piece (4) to one side of the inner furnace shell (2) far away from the hearth;
s3, mounting the outer furnace shell (1) on one side of the inner furnace shell (2) far away from the hearth, presetting a pipe distribution hole on the outer furnace shell or opening the pipe distribution hole during mounting, and enabling the end part of the water-cooling pipe (3) to penetrate through the outer furnace shell (1);
s4, filling heat-conducting refractory materials (5) between the inner furnace shell (2) and the outer furnace shell (1) and tamping.
8. The method for installing a novel hearth cooling structure according to claim 7, wherein said step S2 further includes: meanwhile, hearth carbon bricks are built along one side of the inner furnace shell (2) close to the inside of the hearth, and the inner furnace shell (2) is tightly connected with the hearth carbon bricks through building slurry.
9. The installation method of the novel hearth cooling structure according to claim 7, wherein the method comprises the following steps: the outer furnace shell (1) is formed by combining a plurality of layers, the upper end surface of the lower layer is abutted against the lower end surface of the upper layer in two adjacent layers, the outer furnace shell (1) is installed from bottom to top in a layered mode in step S3, and heat-conducting refractory materials (5) are filled and tamped once in step S4 after one layer is installed.
10. The installation method of the novel hearth cooling structure according to claim 7, wherein the method comprises the following steps: the fixing pieces (4) are bolts or screws and are provided with a plurality of bolts or screws, one end of each fixing piece is welded with one side of the inner furnace shell (2) far away from the hearth and is arranged vertically, a through hole is formed in the corresponding position of the outer furnace shell (1), the other end of each fixing piece (4) penetrates through the through hole, and a nut is installed on one side of the outer furnace shell (1) far away from the hearth in a threaded mode; in the step S3, the outer shell (1) is fixed to the outer periphery of the inner shell (2) by tightening the nut; the installation method further comprises the following steps:
s5, after the outer furnace shell (1) is installed and the heat-conducting refractory material (5) is filled and tamped, screwing the nut again for compacting the heat-conducting refractory material (5) for the second time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210029926.8A CN114350871A (en) | 2022-01-12 | 2022-01-12 | Novel hearth cooling structure and mounting method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210029926.8A CN114350871A (en) | 2022-01-12 | 2022-01-12 | Novel hearth cooling structure and mounting method thereof |
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| CN114350871A true CN114350871A (en) | 2022-04-15 |
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| CN202210029926.8A Pending CN114350871A (en) | 2022-01-12 | 2022-01-12 | Novel hearth cooling structure and mounting method thereof |
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|---|---|---|---|---|
| SU1084301A1 (en) * | 1979-03-05 | 1984-04-07 | Всесоюзный Научно-Исследовательский И Проектный Институт По Очистке Технологических Газов,Сточных Вод И Использованию Вторичных Энергоресурсов Предприятий Черной Металлургии "Внипичерметэнергоочистка" | Device for cooling wall of metallurgical furnace |
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2022
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| SU1084301A1 (en) * | 1979-03-05 | 1984-04-07 | Всесоюзный Научно-Исследовательский И Проектный Институт По Очистке Технологических Газов,Сточных Вод И Использованию Вторичных Энергоресурсов Предприятий Черной Металлургии "Внипичерметэнергоочистка" | Device for cooling wall of metallurgical furnace |
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Application publication date: 20220415 |