Lining structure of main channel of blast furnace molten iron

Abstract

The utility model discloses a lining structure of blast furnace molten iron main ditch, including lining, the lining is composed of working lining layer, permanent lining and heat insulating layer, the utility model discloses through setting up the three -layer structure of working lining layer, permanent lining and heat insulating layer, working lining layer is contacted with high temperature molten iron directly, bears the scour and erosion of molten iron, and permanent lining plays a supporting and protection effect to working lining layer, and heat insulating layer can effectively block the outward transmission of heat, reduces heat loss, protects the steel structure shell of main ditch simultaneously, prolongs its life, and working lining body adopts the composite structure of buffer layer, anti -scouring layer and anti -erosion layer, and anti -erosion layer is contacted with molten iron and slag directly, can resist its chemical erosion, and anti -scouring layer has higher strength and wear resistance, can effectively resist the scouring effect of molten iron, and buffer layer can relieve the stress produced by molten iron impact and temperature change, and protects the inner layer structure.

Description

Technical Field

[0001] This utility model relates to the technical field of blast furnace molten iron main channel, specifically to a lining structure for a blast furnace molten iron main channel. Background Technology

[0002] In the blast furnace ironmaking process, the main trough plays a crucial role in transporting high-temperature molten iron and slag. Its working environment is extremely harsh, subjecting itself to long-term erosion from high temperatures, molten iron and slag, as well as thermal shock. In the existing technology, the lining structure of the blast furnace main trough has insufficient resistance to erosion and scouring, resulting in a short service life of the lining. Frequent maintenance not only increases production costs but also affects the continuous production of the blast furnace. Utility Model Content

[0003] The purpose of this invention is to provide a lining structure for the main trough of blast furnace molten iron, which has the advantages of being resistant to erosion and scouring.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a lining structure for the main trough of blast furnace molten iron, comprising a lining, the lining being composed of a working lining, a permanent lining, and a heat insulation layer, wherein a permanent lining is installed on the inner surface of the working lining, and a heat insulation layer is installed on the inner surface of the permanent lining.

[0005] As a preferred embodiment, a reinforcing connecting rod is embedded between the working liner and the permanent liner. The reinforcing connecting rod is L-shaped, and the bent portion is installed inside the permanent liner.

[0006] As a preferred embodiment, the working liner consists of a buffer layer, an anti-erosion layer, and an anti-corrosion layer. The outer surface of the buffer layer is fitted with an anti-erosion layer, and the outer and inner surfaces of the anti-erosion layer are fitted with anti-corrosion layers.

[0007] As a preferred embodiment, the buffer layer is composed of a high-strength layer, a crack-resistant layer, and a pressure-resistant layer, wherein the crack-resistant layer is installed on the outer surface of the high-strength layer, and the pressure-resistant layer is installed on the outer surface of the crack-resistant layer.

[0008] As a preferred embodiment, the heat insulation layer is made of aluminum silicate fiber felt, and the reinforcing connecting rod is made of heat-resistant steel.

[0009] As a preferred embodiment, the erosion-resistant layer is made of corundum-mullite castable.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model adopts a three-layer structure consisting of a working liner, a permanent liner, and a heat insulation layer. The working liner is in direct contact with the high-temperature molten iron and is subjected to the scouring and erosion of the molten iron. The permanent liner provides support and protection for the working liner. The heat insulation layer can effectively block heat transfer to the outside, reduce heat loss, and protect the steel structure shell of the main trench, extending its service life. The working liner adopts a composite structure of a buffer layer, an anti-scouring layer, and an anti-erosion layer. The anti-erosion layer is in direct contact with the molten iron and slag and can resist their chemical erosion. The anti-scouring layer has high strength and wear resistance and can effectively resist the scouring effect of molten iron. The buffer layer can alleviate the stress caused by the impact of molten iron and temperature changes and protect the inner structure.

[0011] 2. This utility model provides a solid structural foundation for the buffer layer through a high-strength layer, ensuring that it is not easily deformed when subjected to external forces such as molten iron impact, thus guaranteeing the overall structural stability of the buffer layer. The crack-resistant layer can effectively resist the stress caused by factors such as drastic temperature changes and external impacts, reducing or even avoiding the generation of cracks, preventing crack propagation from damaging the entire lining structure, and extending the service life of the buffer layer. The pressure-resistant layer is specifically designed to function against the static pressure of molten iron, and can stably withstand the continuous pressure brought by molten iron, avoiding damage to the buffer layer due to excessive pressure, further improving the reliability of the buffer layer under complex working conditions. Attached Figure Description

[0012] Figure 1 This is a three-dimensional view of the structure of this utility model; Figure 2 This is a partial structural cross-sectional view of the present invention; Figure 3 This is a schematic diagram of the liner structure of this utility model; Figure 4 This is a schematic diagram of the working liner structure of this utility model; Figure 5 This is a schematic diagram of the buffer layer structure of this utility model.

[0013] In the diagram: 1. Liner; 2. Reinforcing connecting rod; 3. Working lining; 4. Permanent lining; 5. Insulation layer; 6. Buffer layer; 7. Erosion-resistant layer; 8. Corrosion-resistant layer; 9. High-strength layer; 10. Crack-resistant layer; 11. Pressure-resistant layer. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments. Example 1:

[0016] Please see Figure 1 As shown, this utility model provides a lining structure for the main trough of blast furnace molten iron, including a lining 1. The lining 1 is composed of a working lining 3, a permanent lining 4, and a heat insulation layer 5. The permanent lining 4 is installed on the inner surface of the working lining 3, and the heat insulation layer 5 is installed on the inner surface of the permanent lining 4.

[0017] This technical solution features a three-layer structure consisting of a working liner 3, a permanent liner 4, and a heat insulation layer 5. The working liner 3 is in direct contact with the high-temperature molten iron and is subjected to the scouring and erosion of the molten iron. The permanent liner 4 provides support and protection for the working liner 3. The heat insulation layer 5 effectively blocks heat transfer to the outside, reducing heat loss, while also protecting the steel structure shell of the main trench and extending its service life. The working liner 1 adopts a composite structure consisting of a buffer layer 6, an anti-scouring layer 7, and an anti-erosion layer 8. The anti-erosion layer 8 is in direct contact with the molten iron and slag and can resist their chemical erosion. The anti-scouring layer 7 has high strength and wear resistance and can effectively resist the scouring effect of the molten iron. The buffer layer 6 can alleviate the stress caused by the impact of molten iron and temperature changes, protecting the inner structure. Example 2:

[0018] Based on Embodiment 1, this utility model is as follows: Figure 2 As shown, a reinforcing connecting rod 2 is embedded between the working liner 3 and the permanent liner 4. The reinforcing connecting rod 2 is L-shaped, and the bent part is installed inside the permanent liner 4.

[0019] Adopting such Figure 1 The technical solution shown has an L-shaped structure that can significantly improve the connection strength between the working liner 3 and the permanent liner 4. The bent part is embedded inside the permanent liner 4 to form a stable connection similar to anchoring, which effectively prevents the two layers from separating or peeling off when subjected to high-temperature molten iron scouring or drastic temperature changes.

[0020] Secondly, in the technical solution, the working liner 3 is composed of a buffer layer 6, an anti-erosion layer 7, and an anti-corrosion layer 8. The outer surface of the buffer layer 6 is fitted with the anti-erosion layer 7, and the inner and outer surfaces of the anti-erosion layer 7 are fitted with the anti-corrosion layer 8. The buffer layer 6 is composed of a high-strength layer 9, a crack-resistant layer 10, and a pressure-resistant layer 11. The outer surface of the high-strength layer 9 is fitted with the crack-resistant layer 10, and the outer surface of the crack-resistant layer 10 is fitted with the pressure-resistant layer 11.

[0021] Its adoption is as follows Figure 1The technical solution shown provides a solid structural foundation for the buffer layer 6, ensuring that it is not easily deformed when subjected to external forces such as molten iron impact, thus guaranteeing the overall structural stability of the buffer layer 6. The crack-resistant layer 10 can effectively resist the stress caused by factors such as drastic temperature changes and external impacts, reducing or even avoiding the generation of cracks, preventing crack propagation from damaging the entire lining structure, and extending the service life of the buffer layer 6. The pressure-resistant layer 11 is specifically designed to withstand the static pressure of molten iron, and can stably withstand the continuous pressure brought by molten iron, avoiding damage to the buffer layer 6 due to excessive pressure, further improving the reliability of the buffer layer 6 under complex working conditions. Example 3:

[0022] This utility model is as follows Figures 1-5 As shown, the heat insulation layer 5 is made of aluminum silicate fiber felt, the reinforcing connecting rod 2 is made of heat-resistant steel, and the erosion-resistant layer 7 is made of corundum mullite castable.

[0023] Using the above technical solution, the heat insulation layer 5 is made of aluminum silicate fiber felt, which has excellent heat insulation performance. It can effectively block the heat of high-temperature molten iron from being transferred outward, reduce heat loss, and prevent the external steel structure of the main trench from being damaged by high temperature, thus extending the overall service life of the equipment. The erosion-resistant layer 7 is made of corundum mullite castable, which has high strength, high wear resistance and excellent high temperature resistance. It can directly resist the strong erosion of high-temperature molten iron, reduce structural damage caused by erosion and wear, significantly improve the service life of the erosion-resistant layer 7, and thus ensure the overall performance of the working lining 3.

[0024] The working principle of this utility model is as follows: By setting a three-layer structure of working lining 3, permanent lining 4 and heat insulation layer 5, the working lining 3 is in direct contact with high-temperature molten iron and is subjected to the scouring and erosion of molten iron. The permanent lining 4 provides support and protection for the working lining 3. The heat insulation layer 5 can effectively block heat transfer to the outside, reduce heat loss, and at the same time protect the steel structure shell of the main trench and extend its service life. The working lining 1 adopts a composite structure of buffer layer 6, scouring layer 7 and erosion layer 8. The erosion layer 8 is in direct contact with molten iron and slag and can resist their chemical erosion. The scouring layer 7 has high strength and wear resistance and can effectively resist the scouring effect of molten iron. The buffer layer 6 can alleviate the stress caused by the impact of molten iron and temperature changes and protect the inner structure.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A lining structure for a blast furnace molten iron main channel, comprising a lining (1), characterized in that: The liner (1) consists of a working liner (3), a permanent liner (4) and a heat insulation layer (5). The inner surface of the working liner (3) is fitted with the permanent liner (4), and the inner surface of the permanent liner (4) is fitted with the heat insulation layer (5).

2. The lining structure of a blast furnace molten iron main trough according to claim 1, characterized in that: A reinforcing connecting rod (2) is embedded between the working liner (3) and the permanent liner (4). The reinforcing connecting rod (2) is L-shaped, and the bent part is installed inside the permanent liner (4).

3. The lining structure of a blast furnace molten iron main channel according to claim 1, characterized in that: The working liner (3) consists of a buffer layer (6), an anti-erosion layer (7) and an anti-corrosion layer (8). The outer surface of the buffer layer (6) is fitted with the anti-erosion layer (7), and the inner and outer surfaces of the anti-erosion layer (7) are fitted with the anti-corrosion layer (8).

4. The lining structure of a blast furnace molten iron main channel according to claim 3, characterized in that: The buffer layer (6) is composed of a high-strength layer (9), a crack-resistant layer (10) and a pressure-resistant layer (11). The crack-resistant layer (10) is installed on the outer surface of the high-strength layer (9), and the pressure-resistant layer (11) is installed on the outer surface of the crack-resistant layer (10).

5. The lining structure of a blast furnace molten iron main channel according to claim 2, characterized in that: The heat insulation layer (5) is made of aluminum silicate fiber felt, and the reinforcing connecting rod (2) is made of heat-resistant steel.

6. The lining structure of a blast furnace molten iron main channel according to claim 3, characterized in that: The erosion-resistant layer (7) is made of corundum-mullite castable.

Images