Sol-impregnated composite refractory brick

Abstract

The utility model relates to the technical field of refractory materials, in particular to a sol-impregnated composite refractory brick, which comprises a refractory brick body, a sol layer is impregnated on the peripheral surface of the refractory brick body, a convex part and a concave part are respectively arranged on the four side surfaces of the refractory brick body, and the convex part and the concave part of the adjacent refractory brick body can be attached to each other. A sol layer is impregnated on the surface of an existing refractory brick structure, on one hand, colloidal particles are fine, have a quite large specific surface area and are colorless and transparent, so that the natural color of a covered object is not affected, and on the other hand, the sol layer is low in viscosity and can permeate all places where water can permeate. And when the silica sol in the sol layer is evaporated, colloidal particles are firmly attached to the surface of an object, silica-oxygen combination is formed among the particles, and the silica sol has the advantages of strong bonding force and high temperature resistance.

Description

Technical Field

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

[0002] Refractory materials are generally divided into two types: unshaped refractories and shaped refractories. Unshaped refractories, also called castables, are mixed powdery granules composed of various aggregates and one or more binders. They must be mixed with one or more liquids before use and have strong fluidity. Shaped refractories generally refer to refractory bricks, which have standard and regular shapes, but can also be custom-made on-site as needed.

[0003] Industrial smelting furnaces, especially those operating under harsh conditions, require refractory bricks with high and stringent specifications. Improving value solely through raw materials and molding processes has limited effect. With the increasing scarcity of refractory raw materials and the fluctuating prices of high-quality raw materials, reducing costs while ensuring necessary specifications is a crucial consideration. Utility Model Content

[0004] This invention addresses the above problems by providing a sol-impregnated composite refractory brick.

[0005] The technical solution adopted is a sol-impregnated composite refractory brick, which includes a refractory brick body, wherein the outer peripheral surface of the refractory brick body is impregnated with a sol layer, and the four sides of the refractory brick body are respectively provided with protrusions and depressions, and the protrusions and depressions of adjacent refractory brick bodies can fit together.

[0006] Optionally, the sol layer is a silica sol layer, and the molecular formula of the effective component in the silica sol layer is mSiO2nH2O.

[0007] Optionally, the protrusion includes a first protrusion and a second protrusion, and the first protrusion and the second protrusion are respectively located on two adjacent sides of the refractory brick body.

[0008] Optionally, both the first protrusion and the second protrusion have a semi-cylindrical protrusion structure.

[0009] Optionally, the recess includes a first recess and a second recess, and the first recess and the second recess are located on two adjacent sides of the refractory brick body, respectively.

[0010] Optionally, both the first and second recesses have a semi-cylindrical recess structure.

[0011] Optionally, a first roughening layer and a second roughening layer are respectively provided in the first recess and the second recess.

[0012] The advantages of this utility model include:

[0013] 1. By impregnating the surface of an existing refractory brick structure with a sol layer, the colloidal particles are fine and have a large specific surface area. The particles themselves are colorless and transparent, so they do not affect the original color of the covered object. On the other hand, the sol layer has low viscosity and can penetrate wherever water can penetrate. Therefore, it has excellent dispersibility and permeability when mixed with other substances. Furthermore, when the water in the silica sol in the sol layer evaporates, the colloidal particles firmly adhere to the surface of the object, and silicon-oxygen bonds are formed between the particles, which have strong adhesion and high temperature resistance.

[0014] 2. By setting protrusions and recesses on the refractory brick body, adjacent refractory bricks can be connected through the protrusions and recesses, thereby improving the overall connection tightness. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a sol-impregnated composite refractory brick structure.

[0016] Figure 2 This is a schematic diagram of another type of sol-impregnated composite refractory brick structure;

[0017] Figure 3 This is a schematic diagram of the connection of sol-impregnated composite refractory bricks;

[0018] Figure 4 This is a picture of the actual product being impregnated.

[0019] In the attached drawings, the following reference numerals are used: 1 represents the refractory brick body, 2 represents the first protrusion, 3 represents the second protrusion, 4 represents the first depression, 5 represents the second depression, 6 represents the first rough layer, and 7 represents the second rough layer. Detailed Implementation

[0020] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features can be combined with each other.

[0021] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0022] like Figures 1 to 3As shown, a sol-impregnated composite refractory brick includes a refractory brick body 1, wherein the outer peripheral surface of the refractory brick body 1 is impregnated with a sol layer, and the four sides of the refractory brick body 1 are respectively provided with protrusions and recesses, and the protrusions and recesses of adjacent refractory brick bodies 1 can fit together.

[0023] The purpose of this design is to impregnate the surface of the existing refractory brick structure with a sol layer. On the one hand, the colloidal particles are fine and have a large specific surface area. The particles themselves are colorless and transparent, so they do not affect the original color of the covered object. On the other hand, the sol layer has low viscosity and can penetrate wherever water can penetrate. Therefore, it has excellent dispersibility and permeability when mixed with other substances. Furthermore, when the water in the silica sol in the sol layer evaporates, the colloidal particles firmly adhere to the surface of the object, and silicon-oxygen bonds are formed between the particles, which have strong adhesion and high temperature resistance.

[0024] In this embodiment, the sol layer is a silica sol layer, and the molecular formula of the effective component in the silica sol layer is mSiO2nH2O.

[0025] It should be noted that the silica sol composition is as follows: pH value (25℃) 9-11, density (25℃) 1.2 g / cm³, SiO2 ≥ 30%, and viscosity (25℃) mPa.s ≤ 7.

[0026] At the same time, such as Figure 4 As shown, the method of adding it to the surface of refractory bricks is to soak freshly fired aluminosilicate refractory bricks in silica sol for 2-4 hours when the surface temperature of the bricks is about 50°C, and then take them out and let them air dry naturally.

[0027] The silica sol added in the above manner has the following properties: increased bulk density by 0.1-0.12 g / cm³, decreased apparent porosity by 2%-3%, increased hot strength at 1450℃*1h by 20%-30%, and also has a certain antioxidant effect on aluminosilicate bricks.

[0028] Furthermore, this method of impregnating silica sol has the same reinforcing effect on high-alumina bricks, clay bricks, lightweight mullite bricks, aluminosilicate bricks, composite mullite bricks, and aluminosilicate precast components.

[0029] In this embodiment, specific structures of the protrusions and recesses are also provided. The protrusions include a first protrusion 2 and a second protrusion 3, and the first protrusion 2 and the second protrusion 3 are respectively located on two adjacent sides of the refractory brick body 1. Both the first protrusion 2 and the second protrusion 3 have a semi-cylindrical protrusion structure. The recesses include a first recess 4 and a second recess 5, and the first recess 4 and the second recess 5 are respectively located on two adjacent sides of the refractory brick body 1. Both the first recess 4 and the second recess 5 have a semi-cylindrical recess structure.

[0030] The purpose of this design is to improve the overall tightness of the connection by setting protrusions and recesses on the refractory brick body so that adjacent refractory bricks can be connected through the protrusions and recesses.

[0031] In this embodiment, a first rough layer 6 and a second rough layer 7 are respectively provided in the first recess 4 and the second recess 5.

[0032] The purpose of this design is to create a rough layer in the recessed area. This rough layer is mainly achieved by setting longitudinal and transverse scratches in the mold, so that the produced refractory bricks have rough longitudinal and transverse scratches in the recessed area, which facilitates the impregnation of the sol layer.

[0033] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sol-impregnated composite refractory brick, comprising a refractory brick body (1), characterized in that, The outer circumferential surface of the refractory brick body (1) is impregnated with a sol layer, and the four sides of the refractory brick body (1) are respectively provided with protrusions and depressions, and the protrusions and depressions of adjacent refractory brick bodies (1) can fit together.

2. The sol-impregnated composite refractory brick according to claim 1, characterized in that, The sol layer is a silica sol layer, and the molecular formula of the effective component in the silica sol layer is mSiO2nH2O.

3. The sol-impregnated composite refractory brick according to claim 1, characterized in that, The protrusions include a first protrusion (2) and a second protrusion (3), and the first protrusion (2) and the second protrusion (3) are located on two adjacent sides of the refractory brick body (1), respectively.

4. The sol-impregnated composite refractory brick according to claim 3, characterized in that, Both the first protrusion (2) and the second protrusion (3) are semi-cylindrical protrusions.

5. The sol-impregnated composite refractory brick according to claim 4, characterized in that, The recessed portion includes a first recessed portion (4) and a second recessed portion (5), and the first recessed portion (4) and the second recessed portion (5) are located on two adjacent sides of the refractory brick body (1), respectively.

6. The sol-impregnated composite refractory brick according to claim 5, characterized in that, Both the first recess (4) and the second recess (5) have a semi-cylindrical recess structure.

7. The sol-impregnated composite refractory brick according to claim 5, characterized in that, A first rough layer (6) and a second rough layer (7) are respectively provided in the first recess (4) and the second recess (5).

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