Blast furnace iron runner castable structure

Abstract

The utility model is suitable for the technical field of blast furnace iron runners, and provides a blast furnace iron runner castable structure which comprises a heat-resistant reinforced concrete main runner, the castable layer is arranged in the heat-resistant reinforced concrete main channel and is used for protecting the heat-resistant reinforced concrete main channel; the protective layer is arranged on the surface of the castable layer; and the steel shell is arranged on the heat-resistant reinforced concrete main channel and is used for assisting the heat dissipation of the heat-resistant reinforced concrete main channel. According to the blast furnace iron runner castable structure provided by the scheme, the high temperature resistance and the erosion resistance of a main runner can be remarkably improved, the performance failure speed of heat-resistant reinforced concrete is delayed, cracks are reduced, and therefore the service life of the main runner is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of blast furnace troughs, and particularly relates to a structure of a castable for blast furnace troughs. Background Art

[0002] With the continuous improvement of blast furnace smelting level, iron-making blast furnaces are gradually developing towards large-scale, and the pursuit of high smelting intensity and long service life of blast furnaces is the main direction of technicians in the iron-making field. As the main supporting facility of the blast furnace, the integrity and safety of the main trough have also become the main factors affecting the long service life of the blast furnace.

[0003] At present, the structure of the main trough of large-scale blast furnaces generally adopts a heat-resistant reinforced concrete structure with a wall thickness of generally 400 mm. During the long-term operation of the blast furnace, the performance of the heat-resistant reinforced concrete will gradually fail and cracks will occur under the action of thermal radiation and alternating thermal stress of high-temperature molten iron, thus reducing the service life of the trough. Summary of the Utility Model

[0004] The utility model provides a structure of a castable for blast furnace troughs, aiming to solve the problem of the short service life of the currently used blast furnace troughs as proposed in the above background art.

[0005] To solve the above problems, the utility model is realized as follows: A structure of a castable for blast furnace troughs includes: a heat-resistant reinforced concrete main trough; a castable layer arranged in the heat-resistant reinforced concrete main trough for protecting the heat-resistant reinforced concrete main trough; a protective layer arranged on the surface of the castable layer; and a steel shell installed on the heat-resistant reinforced concrete main trough for assisting the heat-resistant reinforced concrete main trough to dissipate heat.

[0006] Preferably, an inclined plate is arranged at the top of the protective layer, the top of the inclined plate is arranged in an inclined shape, and the inclined plate is used to guide the discharge of materials.

[0007] Preferably, a support frame is installed in the steel shell, a support plate is installed on the support frame, and the support plate is in close contact with one side of the heat-resistant reinforced concrete main trough.

[0008] Preferably, anchor claws are arranged on one side of the heat-resistant reinforced concrete main trough, the anchor claws are in close contact with the castable layer, and fiber strips are arranged on the anchor claws.

[0009] Preferably, a discharge channel is installed on one side of the heat-resistant reinforced concrete main trough, and one end of the discharge channel extends into the protective layer.

[0010] Preferably, the thickness of the heat-resistant reinforced concrete main trough is 200 mm, and the thicknesses of both the castable layer and the protective layer are 100 mm.

[0011] Preferably, the materials of the protective layer and the inclined plate are both refractory fiber felt materials.

[0012] Compared with the related art, the blast furnace runner castable structure provided by the present utility model has the following beneficial effects:

[0013] Compared with the prior art, the blast furnace runner castable structure provided by this solution combines various materials and structures such as heat-resistant reinforced concrete, castable layer, protective layer, and steel shell to construct a large-scale blast furnace main runner structure with high performance and long life. It not only improves the high-temperature resistance and erosion resistance of the heat-resistant reinforced concrete main runner, but also reduces the damage of thermal stress to the structure through optimized heat dissipation design, thereby significantly extending the service life of the heat-resistant reinforced concrete main runner, reducing the blast furnace maintenance cost, and improving the production efficiency.

[0014] In summary, the blast furnace runner castable structure of the present utility model can significantly improve the high-temperature resistance and erosion resistance of the main runner, delay the speed of heat-resistant reinforced concrete performance failure, reduce crack generation, and thus extend the service life of the main runner. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic front sectional view of a blast furnace runner castable structure provided by the present utility model;

[0016] Figure 2 is a schematic side sectional view of the heat-resistant reinforced concrete main runner in the present utility model;

[0017] Figure 3 is Figure 1 an enlarged schematic view of part A shown in

[0018] Reference numerals: 1, heat-resistant reinforced concrete main runner; 2, castable layer; 3, protective layer; 4, steel shell; 5, inclined plate; 6, support frame; 7, support plate; 8, anchor claw; 9, fiber strip; 10, discharge channel. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification, claims or drawings of this application are used to distinguish different objects and not to describe a specific order; the orientation or positional relationship indicated by the terms "inner", "outer", "left", "right" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present utility model.

[0020] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0021] An embodiment of the present utility model provides a structure of a blast furnace trough castable, as Figures 1-3 shown, the structure of the blast furnace trough castable includes: a heat-resistant reinforced concrete main trough 1; a castable layer 2 provided in the heat-resistant reinforced concrete main trough 1 for protecting the heat-resistant reinforced concrete main trough 1; a protective layer 3 provided on the surface of the castable layer 2; and a steel shell 4 installed on the heat-resistant reinforced concrete main trough 1 for assisting the heat dissipation of the heat-resistant reinforced concrete main trough 1.

[0022] In this embodiment, the heat-resistant reinforced concrete main trough 1 is made of heat-resistant reinforced concrete material, which has better high-temperature resistance than ordinary concrete and can maintain the structural stability during the long-term operation of the blast furnace. The refractory layer 2 is directly laid inside the heat-resistant reinforced concrete main trough 1 as a protective layer, effectively isolating the direct heat radiation and erosion of the high-temperature molten iron on the heat-resistant reinforced concrete main trough 1, reducing the damage of thermal stress to the structure of the heat-resistant reinforced concrete main trough 1, delaying the speed of heat-resistant reinforced concrete performance failure, reducing crack generation, and thus prolonging the service life of the main trough. The introduction of the steel shell 4 effectively improves the heat dissipation condition of the heat-resistant reinforced concrete main trough 1, reduces the thermal stress concentration caused by high temperature, and further prolongs the service life of the main trough. At the same time, the steel shell 4 may also play a role in strengthening the structure of the main trough and improving its overall stability. By combining various materials and structures such as heat-resistant reinforced concrete, refractory layer 2, protective layer 3, and steel shell 4, a large-scale blast furnace main runner structure with high performance and long life is constructed, which not only improves the high-temperature resistance and erosion resistance of the heat-resistant reinforced concrete main trough 1, but also reduces the damage of thermal stress to the structure through optimized heat dissipation design, thus significantly prolonging the service life of the heat-resistant reinforced concrete main trough 1, reducing the blast furnace maintenance cost, and improving the production efficiency.

[0023] In a further preferred embodiment of the present utility model, an inclined plate 5 is provided at the top of the protective layer 3, and the top of the inclined plate 5 is inclined, and the inclined plate 5 is used to guide the discharge of materials.

[0024] In this embodiment, during the operation of the blast furnace, when the molten iron and other accompanying materials flow through the heat-resistant reinforced concrete main trough 1, they may carry a certain amount of residues or sundries. When these materials reach the top of the protective layer 3, they will come into contact with the inclined plate 5 arranged obliquely. Due to the inclination angle of the inclined plate 5, these materials will be affected by the combined action of gravity and the inclined plane and slide along the inclined direction of the inclined plate 5, so as to achieve orderly and centralized discharge. Through the guidance of the inclined plate 5, the materials can be discharged from the heat-resistant reinforced concrete main trough 1 more smoothly, reducing the accumulation at the top of the protective layer 3 or other positions. This not only helps to keep the heat-resistant reinforced concrete main trough 1 clean, but also reduces the safety hazards caused by material accumulation.

[0025] In a further preferred embodiment of the present utility model, a support frame 6 is installed inside the steel shell, and a support plate 7 is installed on the support frame 6, and the support plate 7 is in close contact with one side of the heat-resistant reinforced concrete main trough 1.

[0026] In this embodiment, the combination of the support frame 6 and the support plate 7 provides additional support and reinforcement for the heat-resistant reinforced concrete main trough 1. They work together to evenly distribute the weight and stress borne by the heat-resistant reinforced concrete main trough 1 across the entire structure, effectively preventing structural damage caused by local stress concentration. The close contact between the support plate 7 and the heat-resistant reinforced concrete main trough 1 also promotes heat transfer. During the operation of the blast furnace, the high-temperature molten iron in the heat-resistant reinforced concrete main trough 1 generates a large amount of heat. As part of the heat conduction path, the support plate 7 helps transfer the heat to the steel shell 4 more quickly, and then the heat is discharged outside the steel shell 4 through the ventilation and heat dissipation in the steel shell 4.

[0027] In a further preferred embodiment of the present utility model, an anchor claw 8 is provided on one side of the heat-resistant reinforced concrete main trough 1. The anchor claw 8 is in close contact with the castable layer 2, and a fiber strip 9 is provided on the anchor claw 8.

[0028] In this embodiment, the close contact between the anchor claw 8 and the castable layer 2, together with the addition of the fiber strip 9, constitutes a strong bonding system. This structural optimization makes the bonding between the heat-resistant reinforced concrete main trough 1 and the castable layer 2 more firm, effectively preventing the phenomenon of peeling or cracking caused by weak bonding. The tensile and crack-resistant properties of the fiber strip 9, as well as its stress absorption and dispersion effects, enable the entire structure to maintain good stability and integrity when facing adverse factors such as temperature changes and external force impacts, thereby extending the service life.

[0029] In a further preferred embodiment of the present utility model, a discharge channel 10 is installed on one side of the heat-resistant reinforced concrete main trough 1, and one end of the discharge channel 10 extends into the protective layer 3.

[0030] In this embodiment, by timely and effectively discharging the impurities and residues in the heat-resistant reinforced concrete main trough 1, the operation interruption or delay caused by material accumulation is reduced, thereby improving the overall operation efficiency of the blast furnace. By reducing the accumulation of materials in the heat-resistant reinforced concrete main trough 1, the erosion and wear of the heat-resistant reinforced concrete main trough 1, the castable layer 2, and the protective layer 3 are reduced, further extending the service life of the heat-resistant reinforced concrete main trough 1.

[0031] In a further preferred embodiment of the present utility model, the thickness of the heat-resistant reinforced concrete main trough 1 is 200 mm, and the thicknesses of both the castable layer 2 and the protective layer 3 are 100 mm.

[0032] In this embodiment, the reasonable design of the thickness of each layer together constitutes a stable and durable trough structure, which can withstand the erosion of high-temperature molten iron and its accompanying stress for a long time, ensuring the continuity and stability of blast furnace operation. The thickness design of the castable layer 2 effectively isolates the direct heating of the main trough by high-temperature molten iron, reduces heat loss and energy waste, and at the same time reduces the risk of accelerated aging of the main trough due to high temperature. The thickness design of the protective layer 3 enhances its protection ability against external impurities and guides the orderly discharge of materials through its structural characteristics, reducing material accumulation and potential safety hazards.

[0033] In a further preferred embodiment of the present utility model, the materials of the protective layer 3 and the inclined plate 5 are both made of refractory fiber felt material.

[0034] In this embodiment, the protective layer 3 made of refractory fiber felt material can more effectively isolate the erosion of high temperature and corrosive factors, protecting the underlying structure from damage. At the same time, its good heat preservation performance also helps to maintain the appropriate working temperature of the structure. The inclined plate 5 is made of the same refractory fiber felt material, not only maintaining the same fire resistance, heat preservation and corrosion resistance as the protective layer 3, but also effectively guiding the discharge of materials by virtue of its light weight and high strength, enabling the materials to be discharged more smoothly and concentratedly to the designated position, reducing material accumulation and potential safety hazards.

[0035] In summary, compared with the related art, the present device can significantly improve the high-temperature resistance and erosion resistance of the main trough, delay the speed of performance failure of heat-resistant reinforced concrete, reduce crack generation, and thus extend the service life of the main trough.

[0036] In several embodiments provided by the present application, it should be understood that the disclosed device can be implemented in other ways.

[0037] The above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit the protection scope of the utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all embodiments. Based on these embodiments, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, those of ordinary skill in the art can still, without conflict, make combinations, additions, deletions or other adjustments to the features in the embodiments of the present utility model according to the situation without creative work, so as to obtain different technical solutions that essentially do not deviate from the concept of the present utility model, and these technical solutions also belong to the scope of protection of the present utility model.

Claims

1. A structure of a blast furnace trough castable, characterized in that, Comprising: Heat-resistant reinforced concrete main trough; Refractory castable layer provided in the heat-resistant reinforced concrete main trough for protecting the heat-resistant reinforced concrete main trough; Protective layer provided on the surface of the refractory castable layer; Steel shell installed on the heat-resistant reinforced concrete main trough for assisting the heat dissipation of the heat-resistant reinforced concrete main trough.

2. The structure of the BF trough castable according to claim 1, characterized in that An inclined plate is provided at the top of the protective layer, the top of the inclined plate is inclined, and the inclined plate is used to guide the discharge of materials.

3. The structure of the blast furnace trough casting material according to claim 1, wherein A support frame is installed in the steel shell, a support plate is installed on the support frame, and the support plate is in close contact with one side of the heat-resistant reinforced concrete main trough.

4. The structure of the blast furnace trough castable as claimed in claim 1, wherein, Anchor claws are provided on one side of the heat-resistant reinforced concrete main trough, the anchor claws are in close contact with the refractory castable layer, and fiber strips are provided on the anchor claws.

5. The structure of the blast furnace trough castable according to claim 1, characterized in that, A discharge channel is installed on one side of the heat-resistant reinforced concrete main trough, and one end of the discharge channel extends into the protective layer.

6. The structure of the blast furnace trough castable according to claim 2, characterized in that, The thickness of the heat-resistant reinforced concrete main trough is 200 mm, and the thicknesses of the refractory castable layer and the protective layer are both 100 mm.

7. The structure of the blast furnace trough castable according to claim 2, characterized in that, The materials of the protective layer and the inclined plate are both refractory fiber felt materials.

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