Impermeable refractory high alumina bricks

Abstract

This utility model provides a high-alumina refractory brick with impermeability, including a refractory brick body composed of a dense impermeable layer, a transition buffer layer, and a support layer. The transition buffer layer is disposed between the dense impermeable layer and the support layer. A flow-guiding groove is formed on the top surface of the dense impermeable layer, and a composite boron carbide coating is disposed on the inner wall of the flow-guiding groove. The high-alumina refractory brick with impermeability adopts a three-layer gradient composite structure: a dense impermeable layer on the surface, a transition buffer layer in the middle, and a high-strength support layer at the bottom, which improves its support performance. The surface layer is modified by composite modification of nano-silicon carbide powder and ultrafine zirconium oxide powder to form a dense surface, providing its impermeability. Moreover, by setting the flow-guiding groove, the flow of melt is guided and the seepage pressure is reduced. While maintaining the inherent advantages of high-alumina bricks, a multi-layer impermeability system from active flow guidance to passive defense is constructed, which solves the problem of delamination and spalling caused by seepage in traditional refractory bricks and significantly extends the service life of kilns.

Description

Technical Field

[0001] This utility model relates to the field of permeable refractory high alumina bricks, and in particular to impermeable refractory high alumina bricks. Background Technology

[0002] High-alumina bricks are widely used for lining blast furnaces, hot blast stoves, electric furnace roofs, blast furnaces, reverberatory furnaces, and rotary kilns due to their excellent refractoriness, load softening temperature, and slag resistance.

[0003] Extensive research revealed that existing high-alumina bricks do not provide adequate waterproofing and cannot fully protect the brick body during use.

[0004] Therefore, it is necessary to provide impermeable refractory high-alumina bricks to solve the above-mentioned technical problems. Utility Model Content

[0005] This invention provides impermeable refractory high-alumina bricks, which solves the problems in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides a high-alumina refractory brick with impermeability, comprising a refractory brick body, wherein the refractory brick body is composed of a dense impermeable layer, a transition buffer layer and a support layer, wherein the transition buffer layer is disposed between the dense impermeable layer and the support layer, wherein a flow guiding groove is formed on the top surface of the dense impermeable layer, and a composite boron carbide coating is disposed on the inner wall of the flow guiding groove.

[0007] Preferably, the surface of the transition buffer layer is provided with micropores, and multiple micropores are provided, with the multiple micropores being equally spaced on the surface of the transition buffer layer.

[0008] Preferably, the inner wall of the micropores is provided with a stone fiber reinforced network.

[0009] Preferably, the refractory brick body is provided with a slot and a block at both ends.

[0010] Preferably, the card slot and the card block are fitted with a clearance of zero.

[0011] Preferably, multiple guide grooves are provided, and the multiple guide grooves are equally spaced on the top surface of the refractory brick body.

[0012] Compared with related technologies, the impermeable refractory high-alumina brick provided by this utility model has the following beneficial effects:

[0013] Compared with existing technologies, the impermeable high-alumina refractory brick adopts a three-layer gradient composite structure: a dense impermeable layer on the surface (5-8mm thick), a middle transition buffer layer, and a bottom high-strength support layer, which improves its support performance. The surface layer is modified by composite modification of nano-silicon carbide powder and ultrafine zirconia powder to form a dense surface, providing impermeability. Moreover, by setting flow-guiding grooves, the melt flow is guided and the seepage pressure is reduced. This invention, while maintaining the inherent advantages of high-alumina bricks, constructs a multi-layer impermeability system from active flow guidance to passive defense, solving the problem of delamination and spalling caused by seepage in traditional refractory bricks, and significantly extending the service life of kilns.

[0014] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of the impermeable refractory high-alumina brick provided by this utility model;

[0016] Figure 2 A front view of the impermeable refractory high-alumina brick provided by this utility model;

[0017] Figure 3 A schematic diagram of the locking block structure for the impermeable refractory high-alumina brick provided by this utility model;

[0018] Figure 4 A schematic diagram of the flow channel structure for the impermeable refractory high alumina brick provided by this utility model;

[0019] Figure 5 A schematic diagram of the microporous structure of the impermeable refractory high-alumina brick provided by this utility model.

[0020] Numbering on the map:

[0021] 1. Refractory brick body; 2. Dense impermeable layer; 3. Transition buffer layer; 4. Support layer; 5. Micropores; 6. Slots; 7. Guide grooves; 8. Blocks; 9. Composite boron carbide coating; 10. Stone fiber reinforced network. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] First Embodiment

[0024] Please refer to the following: Figure 1-4 The impermeable refractory high alumina brick includes a refractory brick body 1, which is composed of a dense impermeable layer 2, a transition buffer layer 3 and a support layer 4. The transition buffer layer 3 is disposed between the dense impermeable layer 2 and the support layer 4. A flow guiding groove 7 is formed on the top surface of the dense impermeable layer 2, and a composite boron carbide coating 9 is provided on the inner wall of the flow guiding groove 7.

[0025] The working principle of the impermeable refractory high-alumina brick provided by this utility model is as follows:

[0026] This anti-permeability refractory high-alumina brick adopts a three-layer gradient composite structure: a dense anti-permeability layer 2 (5-8mm thick), an intermediate transition buffer layer, and a bottom high-strength support layer 4, which improves its support performance. The surface layer is modified by composite modification of nano-silicon carbide powder and ultrafine zirconia powder to form a dense surface, providing its anti-permeability performance. Moreover, by setting flow-guiding grooves 7, the melt flow is guided and the permeation pressure is reduced. This invention, while maintaining the inherent advantages of high-alumina bricks, constructs a multi-layer anti-permeability system from active flow guidance to passive defense, solving the problem of delamination and spalling caused by permeation in traditional refractory bricks, and significantly extending the service life of kilns.

[0027] Compared with related technologies, the impermeable refractory high-alumina brick provided by this utility model has the following beneficial effects:

[0028] This anti-permeability refractory high-alumina brick adopts a three-layer gradient composite structure: a dense anti-permeability layer 2 (5-8mm thick), an intermediate transition buffer layer, and a bottom high-strength support layer 4, which improves its support performance. The surface layer is modified by composite modification of nano-silicon carbide powder and ultrafine zirconia powder to form a dense surface, providing its anti-permeability performance. Moreover, by setting flow-guiding grooves 7, the melt flow is guided and the permeation pressure is reduced. This invention, while maintaining the inherent advantages of high-alumina bricks, constructs a multi-layer anti-permeability system from active flow guidance to passive defense, solving the problem of delamination and spalling caused by permeation in traditional refractory bricks, and significantly extending the service life of kilns.

[0029] Second Embodiment

[0030] Please refer to the following: Figure 1-5 Based on the impermeable refractory high-alumina brick provided in the first embodiment of this application, the second embodiment of this application proposes another impermeable refractory high-alumina brick. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0031] Based on Example 1, see [link / reference] Figure 1-5 The surface of the transition buffer layer 3 is provided with micropores 5, and multiple micropores 5 are provided, and the multiple micropores 5 are equally spaced on the surface of the transition buffer layer 3.

[0032] Based on Example 1, see [link / reference] Figure 1-5 The inner wall of the micropore 5 is provided with a stone fiber reinforced network 10.

[0033] Based on Example 1, see [link / reference] Figure 1-5 The refractory brick body 1 is provided with a slot 6 and a block 8 at both ends.

[0034] Based on Example 1, see [link / reference] Figure 1-5 The slot 6 and the block 8 are fitted with a clearance of zero.

[0035] Preferably, multiple flow channels 7 are provided, and the multiple flow channels 7 are equally spaced on the top surface of the refractory brick body 1.

[0036] It should be noted that all components used in this application are standard parts that can be purchased from the market. The specific connection methods of each part adopt conventional methods such as bolts, rivets and welding that are mature in the prior art. The mechanical parts and electrical equipment adopt conventional models in the prior art. The circuit connection adopts conventional connection methods in the prior art. The electrical equipment is connected to an external safe power source. These will not be described in detail here.

[0037] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A high-alumina refractory brick with impermeability, comprising a refractory brick body (1), characterized in that, The refractory brick body (1) is composed of a dense impermeable layer (2), a transition buffer layer (3) and a support layer (4). The transition buffer layer (3) is disposed between the dense impermeable layer (2) and the support layer (4). A flow guide groove (7) is provided on the top surface of the dense impermeable layer (2), and a composite boron carbide coating (9) is provided on the inner wall of the flow guide groove (7).

2. The impermeable refractory high-alumina brick according to claim 1, characterized in that, The surface of the transition buffer layer (3) is provided with micropores (5), and multiple micropores (5) are provided, and multiple micropores (5) are provided at equal intervals on the surface of the transition buffer layer (3).

3. The impermeable refractory high-alumina brick according to claim 2, characterized in that, The inner wall of the micropore (5) is provided with a stone fiber reinforced network (10).

4. The impermeable refractory high-alumina brick according to claim 1, characterized in that, The refractory brick body (1) is provided with a slot (6) and a block (8) at both ends.

5. The impermeable refractory high-alumina brick according to claim 4, characterized in that, The slot (6) and the block (8) are fitted with a clearance of zero.

6. The impermeable refractory high-alumina brick according to claim 1, characterized in that, The guide groove (7) is provided in multiple ways, and the multiple guide grooves (7) are equally spaced on the top surface of the refractory brick body (1).

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