CN215162881U - Blast furnace hot blast main pipe compensator refractory anti-loosening structure - Google Patents
Blast furnace hot blast main pipe compensator refractory anti-loosening structure Download PDFInfo
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- CN215162881U CN215162881U CN202120767194.3U CN202120767194U CN215162881U CN 215162881 U CN215162881 U CN 215162881U CN 202120767194 U CN202120767194 U CN 202120767194U CN 215162881 U CN215162881 U CN 215162881U
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Abstract
The utility model discloses a blast furnace hot blast main compensator material-resistant anti-loosening structure, which belongs to the field of blast furnace hot blast main. Comprises a corrugated compensator, a refractory heat-insulating layer, a light insulating brick layer and a working refractory layer which are arranged in sequence from outside to inside; the working refractory layer comprises a refractory brick masonry bottom and an integral casting arc top, the integral casting arc top is positioned right above the refractory brick masonry bottom, and a central angle alpha corresponding to the integral casting arc top is 150-170 degrees; the steel mould is positioned on the inner side of the integral casting arc top, and the central angle beta corresponding to the steel mould is more than or equal to 190 degrees; and fire-resistant fiber blankets are filled between the integrally cast arc top and the light insulating brick layer and between the light insulating brick layer and the part of the refractory material heat-insulating layer positioned on the upper side of the integrally cast arc top. The utility model discloses the structure reply hot-blast pressure fluctuation's of supplying air in turn ability reinforce can remain former project organization all the time under various operating condition, has prolonged the life of hot-blast house steward compensator by a wide margin.
Description
Technical Field
The utility model relates to a blast furnace hot blast main pipe field specifically is a blast furnace hot blast main pipe compensator resistant material locking structure that moves.
Background
In order to improve the production efficiency and recycle the coal gas generated by blast furnace production, 4 hot blast furnaces are usually equipped in modern large blast furnace ironmaking production, and a 'three-burning one-using' process is adopted, air is heated to more than 1200 ℃ through the hot blast furnaces, is gathered to a hot blast main pipe and enters a hot blast surrounding pipe, is uniformly distributed into 32-36 air supply branch pipes, is blown into the blast furnace through an air port, and is subjected to combustion and redox reaction, so that the smelting of iron ore into qualified molten iron in the blast furnace ironmaking production is completed. The four hot blast stoves are arranged in a single row, and the hot blast main pipe is used for receiving the alternating, uninterrupted and stable hot blast of the qualified heating temperature (1230-1250 ℃) of the 4 hot blast stoves controlled by the hot blast valve; and fed into the blast furnace while maintaining a pressure of 450 Kpa.
The hot air main pipe consists of a steel shell, a compensator, a stabilizing pull rod and a refractory material (called refractory material for short), the furnace is changed for 2 hours generally in order to keep the stability of the air temperature in normal production operation, so that the hot air main pipe bears the action of huge blind plate force at different positions, the steel shell generates certain displacement, and therefore a plurality of corrugated compensators are mounted on the hot air main pipe (between the hot air furnace and the main pipe, between the main pipe and the surrounding pipe and between the positions of the hot air furnaces).
However, each corrugated compensator needs to absorb the displacement of the steel shell structure by about 5-10 mm in each furnace changing operation, so that the internal refractory material becomes loose, the temperature of the corrugated compensator rises, the thermal deformation amount increases, the refractory material further becomes loose and falls off under the condition, a circulating linkage deterioration effect is formed, finally, a serious accident that the upper part of the hot blast main pipe glows in a large area and burns through is caused, and the blast furnace is forced to stop producing and overhaul the hot blast main pipe.
Through search, the existing hot air duct compensator masonry structure of the hot air furnace (application publication No. CN103451341A, application publication No. 2013.12.18) comprises: the heat-insulating brick comprises a pipeline steel shell, a ring plate, a corrugated pipe, expansion joints, a heat-insulating layer, a refractory spray coating, a first layer of heat-insulating brick, a second layer of heat-insulating brick, refractory bricks, expansion joints of the first layer of heat-insulating brick, expansion joints of the second layer of heat-insulating brick, expansion joints of the refractory bricks and special-shaped refractory bricks. Although the scheme in the patent application can play a certain protection role in the stable work of the refractory fiber blanket, once the working layer refractory material is damaged, the stability of the refractory material masonry structure and the refractory fiber blanket is difficult to maintain under the action of interaction stress generated by frequent furnace replacement, and the chain deterioration effect of the circulation still occurs after the operation is carried out for a period of time, so that the accident potential exists.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved by the utility model
The above-mentioned problem to the hot-blast house steward existence of blast furnace in the prior art, the utility model provides a blast furnace hot-blast house steward compensator resistant material locking structure that moves has improved its resistant material and has dealt with the hot-blast pressure fluctuation's of supplying air in turn ability for resistant material remains original design ideal structural condition unchanged, not impaired under various operating condition all the time, has prolonged the life of hot-blast house steward compensator by a wide margin, has ensured safety, the stability of blast furnace hot-blast house steward.
Technical scheme
In order to solve the above problem, the utility model provides a technical scheme does:
a blast furnace hot blast main pipe compensator material-resistant anti-loosening structure is sequentially provided with a corrugated compensator, a material-resistant heat-insulating layer, a light insulating brick layer and a working material-resistant layer from outside to inside;
the working refractory layer comprises a refractory brick masonry bottom and an integral casting arc top, the integral casting arc top is positioned right above the refractory brick masonry bottom, and a central angle alpha corresponding to the integral casting arc top is 150-170 degrees.
Further, the device also comprises a steel die, wherein the steel die is positioned on the inner side of the integral casting arc top, and the central angle beta corresponding to the steel die is more than or equal to 190 degrees.
Further, the central angle of the steel die corresponding to the overlapping and overlapping sections on the two sides of the masonry bottom of the refractory bricks is not less than 20 degrees.
Further, the thickness of the steel die is 4-6 mm, and reinforcing ribs are arranged on the inner side of the steel die.
Further, the central angle α corresponding to the integral casting arc top is 160 °.
Furthermore, fire-resistant fiber blankets are filled between the integral casting arc top and the light insulating brick layer and between the light insulating brick layer and the refractory material heat-insulating layer on the upper side of the integral casting arc top.
Furthermore, the roundness error of the refractory heat-insulating layer is within +/-5 mm, and the roundness error of the light insulating brick layer is within +/-3 mm.
Furthermore, the bottom of the refractory brick masonry comprises a first layer of working bricks and a second layer of working bricks from inside to outside in sequence.
Furthermore, the roundness errors of the first layer of working bricks and the second layer of working bricks are within +/-2 mm.
Advantageous effects
Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:
(1) the utility model provides a blast furnace hot blast main pipe compensator anti-loosening structure made of refractory materials, a working refractory material layer adopts a combined structure of an integral casting arc top and a refractory brick masonry bottom which are combined up and down, the integral casting arc top can ensure the integrity of the upper structure of the hot blast main pipe, and the expansion of the refractory materials due to loosening is avoided; the masonry bottom of the refractory brick can absorb the tension impact born by the hot air main pipe, so that the deformation quantity of the working refractory layer in the hot air main pipe expanded by heating can be buffered and released, and the integral casting arc top is protected from generating cracks; the two structures cooperate and mutually protect, so that the capacity of the refractory material for coping with the pressure fluctuation of the alternately supplied hot air is improved, the refractory material is always kept in an original designed ideal structural state under various working states without changing and damaging, the service life of the hot air main pipe compensator is greatly prolonged, and the safety and the stability of the hot air main pipe of the blast furnace are ensured;
(2) the utility model provides a blast furnace hot blast main pipe compensator resistant material locking structure that moves, when the resistant material structure in the hot blast main pipe expands, the refractory fiber blanket on the above-mentioned position can block hot-blast outside and continue to spread, and the integral casting arc top can play certain guard action to the refractory fiber blanket simultaneously, and both cooperate each other, make the compensator overall structure dynamic stability, further ensured the structural stability of hot blast main pipe system;
(3) the utility model provides a blast furnace hot blast main pipe compensator refractory anti-loosening structure, the lower part of a working refractory layer is built by adopting two layers of working bricks, and the structural stability is better when the working refractory layer is matched with an integrally cast arc top;
(4) the utility model provides a blast furnace hot blast main pipe compensator refractory anti-loosening structure, which optimizes the cooperativity of the whole structure by controlling the roundness error of each refractory layer in the hot blast main pipe, and further improves the stability of the whole structure of the refractory in the hot blast main pipe;
(5) the utility model provides a blast furnace hot blast main pipe compensator resistant material locking structure that moves, in the process of adding the intensification, the steel mould can play stable guard action to the interior resistant material structure of hot blast main pipe, simultaneously in the normal production operation process of 1200 ℃, the steel mould can melt automatically and come off, can not produce substantive influence to the product;
(6) the utility model provides a blast furnace hot blast main pipe compensator refractory material anti-loosening structure, after the masonry of the bottom of the refractory brick is completed, the steel mould can be directly erected on the refractory brick, and the refractory brick does not need to be fixed by an external bracket;
(7) the utility model provides a pair of blast furnace hot blast main pipe compensator resistant material locking structure that moves, steel mould and resistant firebrick build bottom lapped stability better, have improved the pouring precision of whole pouring arc top.
Drawings
Fig. 1 is a schematic structural view of the present invention;
in the drawings: 1. a ripple compensator; 2. a refractory material heat-insulating layer; 3. a light insulating brick layer; 4. a second layer of working bricks; 5. a first layer of working bricks; 6. integrally pouring the arc top; 7. steel molding; 8. a refractory fiber blanket.
Detailed Description
The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings, for the purpose of helping those skilled in the art to understand more completely, accurately and deeply the conception and technical solution of the present invention, and to facilitate its implementation.
Example 1
As shown in fig. 1, in this embodiment, a refractory anti-loosening structure of a blast furnace hot air main pipe compensator is provided, in which a corrugated compensator 1, a refractory heat-insulating layer 2, a light insulating brick layer 3 and a working refractory layer are sequentially arranged from outside to inside; the working refractory layer comprises a refractory brick masonry bottom and an integral casting arc top 6, the integral casting arc top 6 is positioned right above the refractory brick masonry bottom, and a central angle alpha corresponding to the integral casting arc top 6 is in a range of 150-170 degrees.
In the scheme, the working refractory layer adopts a combined structure of the integrally cast arc top 6 and the building bottom of the refractory bricks which are combined up and down, the integrally cast arc top 6 can ensure the integrity of the upper structure of the hot blast main pipe, and the loosening and expansion of the refractory are avoided; the masonry bottom of the refractory bricks can absorb the tension impact born by the hot air main pipe, so that the deformation quantity of the working refractory layer in the hot air main pipe expanded by heating can be buffered and released, and the integral casting arc top 6 is protected from generating cracks. The two structures have synergistic effect and mutual protection, the capacity of the refractory material for coping with alternate air supply hot air pressure fluctuation is improved, the refractory material is always kept in an original design ideal structural state under various working states and is not changed or damaged, the service life of the hot air main pipe compensator is greatly prolonged, and the safety and the stability of the hot air main pipe of the blast furnace are guaranteed.
In this embodiment, the central angle α corresponding to the integrally cast curved top 6 is preferably 160 °, in which case the integrally cast curved top 6 can provide the best protection effect for the top refractory material in the hot blast main pipe.
In this embodiment, the refractory fiber blankets 8 are filled between the integrally cast arc top 6 and the light insulating brick layer 3, and between the light insulating brick layer 3 and the refractory material heat-insulating layer 2 on the upper side of the integrally cast arc top 6. During the resistant material structure expansion in the hot-blast main pipe, the refractory fiber blanket 8 in the above-mentioned position can block hot-blast outside continuation diffusion, and whole pouring arc top 6 can play certain guard action to refractory fiber blanket 8 again simultaneously, and both cooperate each other for compensator overall structure dynamic stability has further ensured the structural stability of hot-blast main pipe system. Specifically, the refractory fiber blanket 8 is an aluminum silicate cotton blanket, and other refractory material blankets can be selected.
In the embodiment, the roundness error of the refractory heat-insulating layer 2 is within +/-5 mm, and the roundness error of the light insulating brick layer 3 is within +/-3 mm. The bottom of the refractory brick masonry comprises a first layer of working bricks 5 and a second layer of working bricks 4 from inside to outside in sequence. The roundness errors of the masonry of the first layer of working bricks 5 and the second layer of working bricks 4 are within +/-2 mm. In this scheme, the refractory material layer lower part of work adopts two-layer work brick to build by laying bricks or stones, and 6 structural stability of cooperation whole pouring arc top is better. Through controlling the roundness error of each refractory layer in the hot air main pipe, the cooperativity of the whole structure is optimized, and the stability of the whole structure of the refractory in the hot air main pipe is further improved.
Example 2
The blast furnace hot blast main pipe compensator material anti-loosening structure in the embodiment has the same basic structure as that in embodiment 1, and is different from that in embodiment 1 in that the blast furnace hot blast main pipe compensator material anti-loosening structure further comprises a steel die 7, and the steel die 7 is positioned on the inner side of the integral casting arc top 6. The steel mould 7 is used for building the integral casting arc top 6, and is not dismantled after the building is finished. In the heating process, the steel die 7 can play a stable protection role in the refractory material structure in the hot air main pipe, and meanwhile, in the normal production operation process at 1200 ℃, the steel die 7 can automatically melt and fall off, so that the product cannot be substantially influenced. The central angle beta corresponding to the steel die 7 is more than or equal to 190 degrees, and the refractory bricks can be directly erected on the steel die after the masonry of the bottom of the refractory bricks is completed without depending on an external support for fixation.
In this embodiment, the central angle of the steel die 7 corresponding to the overlapping and overlapping sections on the two sides of the masonry bottom of the refractory brick is not less than 20 °. The stability of the steel die 7 and the bottom lapping of the refractory brick masonry is better, and the pouring precision of the integral pouring arc top 6 is improved.
The thickness of the steel die 7 in the embodiment is 4-6 mm, and the inner side of the steel die is provided with a reinforcing rib. The strengthening rib is used for strengthening steel mould 7, avoids its inboard bending deformation and influences the pouring precision of whole pouring arc top 6 and the fixed reliability of self.
The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.
Claims (9)
1. A blast furnace hot blast main pipe compensator material-resistant anti-loosening structure is characterized in that a corrugated compensator (1), a material-resistant heat-insulating layer (2), a light heat-insulating brick layer (3) and a working material-resistant layer are sequentially arranged from outside to inside;
the working refractory layer comprises a refractory brick masonry bottom and an integral casting arc top (6), the integral casting arc top (6) is positioned right above the refractory brick masonry bottom, and a central angle alpha corresponding to the integral casting arc top (6) is 150-170 degrees.
2. The blast furnace hot blast main pipe compensator refractory anti-loosening structure according to claim 1, further comprising a steel die (7), wherein the steel die (7) is positioned on the inner side of the integrally cast arc top (6), and a corresponding central angle β of the steel die (7) is greater than or equal to 190 °.
3. The blast furnace hot blast main pipe compensator refractory anti-loosening structure according to claim 2, wherein: the central angle of the steel die (7) corresponding to the overlapping and overlapping sections at the two sides of the masonry bottom of the refractory bricks is not less than 20 degrees.
4. The blast furnace hot blast main pipe compensator refractory anti-loosening structure according to claim 2, wherein: the thickness of the steel die (7) is 4-6 mm, and reinforcing ribs are arranged on the inner side of the steel die.
5. The blast furnace hot blast main pipe compensator refractory anti-loosening structure according to any one of claims 1 to 4, characterized in that: the central angle alpha corresponding to the integral casting arc top (6) is 160 degrees.
6. The blast furnace hot blast main pipe compensator refractory anti-loosening structure according to any one of claims 1 to 4, characterized in that: and refractory fiber blankets (8) are filled between the integral casting arc top (6) and the light insulating brick layer (3) and between the light insulating brick layer (3) and the refractory material heat-insulating layer (2) which are positioned on the upper side of the integral casting arc top (6).
7. The blast furnace hot blast main pipe compensator refractory anti-loosening structure according to any one of claims 1 to 4, characterized in that: the roundness error of the refractory heat-insulating layer (2) is within +/-5 mm, and the roundness error of the light insulating brick layer (3) is within +/-3 mm.
8. The blast furnace hot blast main pipe compensator refractory anti-loosening structure according to any one of claims 1 to 4, characterized in that: the bottom of the refractory brick masonry sequentially comprises a first layer of working bricks (5) and a second layer of working bricks (4) from inside to outside.
9. The blast furnace hot blast main pipe compensator refractory anti-loosening structure according to claim 8, wherein: the roundness errors of the masonry of the first layer of working bricks (5) and the second layer of working bricks (4) are within +/-2 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120767194.3U CN215162881U (en) | 2021-04-14 | 2021-04-14 | Blast furnace hot blast main pipe compensator refractory anti-loosening structure |
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| CN202120767194.3U CN215162881U (en) | 2021-04-14 | 2021-04-14 | Blast furnace hot blast main pipe compensator refractory anti-loosening structure |
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