A multi-component composite refractory brick

Abstract

This patent relates to a multi-component composite refractory brick, designed to address the problems of traditional refractory bricks having limited performance and difficulty adapting to complex high-temperature conditions. This refractory brick employs a composite structure: the base layer is made of high-alumina refractory material with an alumina content of 70%-90%, providing basic support and high-temperature resistance; the middle layer is a magnesia-carbon refractory material with 60%-80% magnesia and 10%-30% graphite, exhibiting good erosion resistance and thermal shock stability; the outer layer is a zirconium refractory material with a zirconium oxide content of 80%-95%, further enhancing surface high-temperature resistance and erosion resistance. Simultaneously, a first transition layer (a mixture of the base and middle layer materials) and a second transition layer (a mixture of the middle and outer layer materials) are incorporated. Through gradual changes in component proportions, thermal stress caused by differences in the thermal expansion coefficients of different materials is effectively alleviated, enhancing overall stability. This multi-component composite refractory brick combines the advantages of multiple materials, enabling it to better adapt to complex high-temperature conditions and significantly improve its service life.

Description

Technical Field

[0001] This utility model relates to the field of refractory brick technology, specifically a multi-component composite refractory brick. Background Technology

[0002] In high-temperature industrial fields, such as steel smelting, glass manufacturing, and cement production, refractory bricks are an indispensable basic material. Traditional refractory bricks are usually made from a single or a few types of refractory raw materials, and their performance is relatively simple, making it difficult to meet the requirements of various complex working conditions in high-temperature environments at the same time.

[0003] For example, in the converter of steelmaking, refractory bricks not only have to withstand the erosion and scouring of high-temperature molten steel, but also resist the chemical corrosion of slag and the thermal stress generated by rapid temperature changes. When faced with these complex conditions, existing refractory bricks are often prone to wear, spalling, and cracking, resulting in a short service life and the need for frequent replacement. This not only increases production costs, but also affects production efficiency.

[0004] Therefore, this utility model provides a multi-component composite refractory brick to solve the above problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a multi-component composite refractory brick, which solves the aforementioned problems.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a multi-component composite refractory brick, comprising a base layer, a first transition layer fixedly installed on the outer side of the base layer, an intermediate layer fixedly installed on the outer side of the first transition layer, a second transition layer fixedly installed on the outer side of the intermediate layer, and an outer layer fixedly installed on the outer side of the second transition layer.

[0007] Preferably, the base layer is made of high-alumina refractory material.

[0008] Preferably, the intermediate layer is made of magnesia-carbon refractory material.

[0009] Preferably, the outer layer is made of zirconium refractory material.

[0010] Preferably, the first transition layer is made of a mixture of the constituent materials of the base layer and the intermediate layer.

[0011] Preferably, the second transition layer is made by mixing the constituent materials of the intermediate layer and the outer layer.

[0012] Beneficial effects

[0013] This invention provides a multi-component composite refractory brick. Compared with the prior art, it has the following advantages:

[0014] 1. This multi-component composite refractory brick combines the advantages of three different refractory materials through a composite structure consisting of a high-alumina base layer, a magnesia-carbon intermediate layer, and a zirconium outer layer. This allows the refractory brick to simultaneously possess high refractoriness, good erosion resistance, thermal shock stability, and mechanical strength, enabling it to better adapt to the requirements of high-temperature and complex working conditions.

[0015] 2. This multi-component composite refractory brick effectively alleviates the thermal stress between different materials through the setting of a transition layer, reduces cracking and spalling caused by differences in thermal expansion, and improves the service life of the refractory brick. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional view of the overall structure of this utility model.

[0018] In the diagram: 1. Base layer; 2. Intermediate layer; 3. Outer layer; 4. First transition layer; 5. Second transition layer. Detailed Implementation

[0019] It should be noted that in the description of the embodiments of this application, the terms "front," "rear," "left," "right," "up," "down," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0020] The present application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0021] Reference Figure 1 This application provides a multi-component composite refractory brick, including a base layer 1, a first transition layer 4 fixedly installed on the outer side of the base layer 1, an intermediate layer 2 fixedly installed on the outer side of the first transition layer 4, a second transition layer 5 fixedly installed on the outer side of the intermediate layer 2, and an outer layer 3 fixedly installed on the outer side of the second transition layer 5.

[0022] In an optional embodiment: the base layer 1 is made of a high-alumina refractory material.

[0023] It should be noted that the main component of the base layer 1 is alumina, with a content between 70% and 90%. High-alumina refractory materials have high refractoriness and mechanical strength, providing basic support and high-temperature resistance for refractory bricks.

[0024] In an optional embodiment, the intermediate layer 2 is made of magnesia-carbon refractory material.

[0025] It should be noted that the intermediate layer 2 contains 60%-80% magnesia and 10%-30% graphite. Magnesia-carbon refractories have good erosion resistance and thermal shock stability, and can effectively resist slag erosion and thermal stress caused by temperature changes.

[0026] In an optional embodiment, the outer layer 3 is made of zirconium refractory material.

[0027] It should be noted that the outer layer 3 is mainly composed of zirconium oxide, with a content of 80%-95%. Zirconium refractory materials have extremely high refractoriness and chemical stability, which can further improve the surface high-temperature resistance and erosion resistance of refractory bricks.

[0028] In an optional embodiment: the first transition layer 4 is made of a mixture of the constituent materials of the base layer 1 and the intermediate layer 2, and the second transition layer 5 is made of a mixture of the constituent materials of the intermediate layer 2 and the outer layer 3.

[0029] It should be noted that the transition layer is made of a mixture of two adjacent layer materials, and its composition ratio gradually transitions between the composition ratios of the two adjacent layers. The setting of the transition layer can alleviate the thermal stress caused by the difference in thermal expansion coefficients between different materials and improve the overall stability of the refractory brick.

[0030] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0031] Working principle: The base layer 1 is made of high-alumina refractory material with an alumina content of 70%-90%, providing basic support and high-temperature resistance; the intermediate layer 2 is made of magnesia-carbon refractory material with 60%-80% magnesia and 10%-30% graphite, possessing good erosion resistance and thermal shock stability; the outer layer 3 is made of zirconium refractory material with a zirconium oxide content of 80%-95%, further enhancing the surface's high-temperature resistance and erosion resistance; while the first transition layer 4 is a mixture of the base layer 1 and the intermediate layer 2, and the second transition layer 5 is a mixture of the intermediate layer 2 and the outer layer 3, with gradually changing composition ratios, which can alleviate the thermal stress caused by the difference in thermal expansion coefficients of different materials, enhance overall stability, and enable the refractory bricks to maintain good performance under high-temperature and complex working conditions.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-component composite refractory brick, comprising a base layer (1), characterized in that: A first transition layer (4) is fixedly installed on the outer side of the base layer (1), an intermediate layer (2) is fixedly installed on the outer side of the first transition layer (4), a second transition layer (5) is fixedly installed on the outer side of the intermediate layer (2), and an outer layer (3) is fixedly installed on the outer side of the second transition layer (5).

2. The multi-component composite refractory brick according to claim 1, characterized in that: The base layer (1) is made of high-alumina refractory material.

3. The multi-component composite refractory brick according to claim 1, characterized in that: The intermediate layer (2) is made of magnesium carbon refractory material.

4. The multi-component composite refractory brick according to claim 1, characterized in that: The outer layer (3) is made of zirconium refractory material.

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