Cordierite mullite brick applied to rotary kiln

Abstract

The cordierite mullite brick applied to the rotary kiln comprises stone brick bodies arranged along the inner circumferential wall of the rotary kiln, a clamping groove is formed in one end of each stone brick body, a clamping protrusion is arranged on the outer side face, away from the clamping groove, of each stone brick body, and the space between every two adjacent stone brick bodies is further filled with bonding cement gum. According to the stone brick, the clamping grooves and the clamping protrusions are mutually clamped in the stone brick body piling process, so that the adjacent stone bricks can be mutually pulled, the stone brick structures are further combined by combining the daub, and the stone bricks are combined into a whole in the carbonization rotary kiln under the stuffy and wet environment and the low-temperature environment; the stone brick body is formed by compounding porous mullite and cordierite, so that the temperature in a furnace can reach the optimal state of heat balance, the heat energy utilization rate is higher, and the effects of increasing efficiency and reducing consumption are achieved. The stone brick body can also have relatively high thermal shock resistance; and the service life of the kiln is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of stone bricks, in particular to a cordierite mullite brick used in a rotary kiln. Background Art

[0002] The activated rotary kiln is a dynamic kiln, which requires the arrangement of thermal insulation materials inside. However, high-temperature insulation materials are generally not strong enough and it is difficult to complete the construction in a dynamic kiln. Therefore, high-aluminum bricks are used as lining materials. The thermal conductivity of high-aluminum bricks is 0.8-1.2. The heat conduction is too fast, which easily leads to large heat loss, resulting in a large amount of heat energy waste and a poor working environment for workers. The existing stone bricks stacked inside are mostly relatively square stone bricks. This type of stone brick cannot be pulled against each other when aligned, and the contact area between the lining bricks and the converter itself is limited, which easily increases the risk of stone bricks falling off after long-term use. In addition, because the production process of the activated rotary kiln requires continuous steam injection, a stuffy, extremely hot and cold furnace environment is formed. The water-cooled thermal shock of high-aluminum bricks is generally 8-10 times, which leads to the breakage and fragmentation of high-aluminum bricks. Utility Model Content

[0003] In view of the defects in the prior art, the utility model provides a cordierite mullite brick used in a rotary kiln. The bricks can be pulled together when stacked, and the risk of falling off is greatly reduced. At the same time, the thermal insulation, shock resistance and stability of the rotary kiln can be significantly improved.

[0004] The technical scheme adopted by the utility model is: a cordierite mullite brick applied to a rotary kiln, comprising a brick body arranged along the inner peripheral wall of the rotary kiln, a clamping groove is arranged at one end of the brick body, a clamping convex is arranged on the outer side of the brick body which is away from the clamping groove, the clamping convex is arranged at the same height as the clamping groove, when a plurality of brick bodies are stacked in parallel, the clamping grooves and clamping convex between adjacent brick bodies are clamped with each other, and bonding clay is also filled between adjacent brick bodies.

[0005] In the technical solution, the stone brick body is arranged on the inner wall of the rotary kiln in a brick-laying manner, which has a good heat insulation effect. During the stacking process of the stone brick body, the card grooves and card protrusions are used to engage with each other, so that the adjacent stone bricks can be pulled together, and the stone brick structure is further combined by combining with glue. In the humid and low temperature environment of the carbonization rotary kiln, the stone bricks are combined into one, which greatly reduces the risk of loosening and falling off.

[0006] Preferably, the surface of the stone brick body in contact with the inner wall of the rotary kiln is arranged in an arc shape.

[0007] Preferably, the cross-sections of the locking grooves and locking protrusions provided on the side surfaces of the stone brick body are arc-shaped structures.

[0008] Preferably, the locking groove and the locking protrusion arranged on the side of the stone brick body are located in the middle of the stone brick body.

[0009] Preferably, the stone brick body is formed by composite molding of porous mullite and cordierite.

[0010] The beneficial effects of the utility model are as follows: the stone brick body of the utility model is arranged on the inner wall of the rotary kiln in a brick-laying manner, and the card grooves and card protrusions are used to engage with each other during the stacking process, so that the adjacent stone bricks can be pulled together, and the stone brick structure is further combined by combining with glue, so that the stone bricks are combined into one in the humid and low temperature environment of the carbonization rotary kiln, which greatly reduces the risk of loosening and falling off. The stone brick body is formed by a composite of porous mullite and cordierite, which can make the temperature in the furnace reach the optimal state of thermal balance, and the thermal energy utilization rate is higher, achieving the effect of increasing efficiency and reducing consumption. It can also make the stone brick body have a strong thermal shock resistance and greatly extend the service life of the kiln. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0012] Figure 1 A three-dimensional diagram of a cordierite mullite brick used in a rotary kiln provided for a specific implementation of the utility model.

[0013] Figure 2 A construction schematic diagram of cordierite mullite bricks used in a rotary kiln is provided for a specific implementation of the utility model.

[0014] Legend: stone brick body 100, slot 110, protrusion 120, bonding mortar 200, rotary kiln 300. DETAILED DESCRIPTION

[0015] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0016] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.

[0017] Reference Figure 1-2The utility model provides a cordierite mullite brick for rotary kiln in a specific embodiment. The cordierite mullite brick is used for laying on the inner wall of rotary kiln 300, so that the heat insulation and thermal shock resistance of rotary kiln 300 are better. The utility model specifically comprises a brick body 100 arranged along the inner wall of rotary kiln 300, wherein one end of the brick body 100 is provided with a slot 110, and the outer side of the brick body 100 opposite to the slot 110 is provided with a protrusion 120, wherein the protrusion 120 is arranged at the same height as the slot 110. When several brick bodies 100 are stacked side by side, the slots 110 and protrusions 120 between adjacent brick bodies 100 are engaged with each other, and bonding paste 200 is also filled between adjacent brick bodies 100.

[0018] like Figure 1 and Figure 2 As shown, through the above arrangement, when the stone brick structure in this embodiment is in use, the stone brick body 100 is arranged on the inner wall of the rotary kiln 300 in a brick-laying manner. During the stacking process of the stone brick body 100, the card groove 110 and the card protrusion 120 are engaged with each other, so that adjacent stone bricks can be pulled together, and the stone brick structure is further combined by combining with the glue 200, so that the stone bricks are combined into one in the humid and low temperature environment of the carbonization rotary kiln 300, which greatly reduces the risk of loosening and falling off.

[0019] like Figure 1 and Figure 2 As shown, since the rotary kiln has a circular inner wall and the stone brick body 100 is built on the inner wall of the rotary kiln 300, one end of the stone brick body 100 needs to contact the inner wall surface of the rotary kiln 300. In this embodiment, the surface of the stone brick body 100 in contact with the inner wall of the rotary kiln 300 is arranged in an arc shape, which can increase the contact area between the stone brick body 100 and the inner wall of the rotary kiln 300, and the stability after bricklaying is better, which further plays a role in preventing falling off, and at the same time has the effect of energy saving and consumption reduction, which can reduce the wear of the product in the furnace and improve the product yield. In actual application, the curvature of the end face of the stone brick body 100 can be calculated according to the inner diameter of the rotary kiln.

[0020] like Figure 1 and Figure 2 As shown, in order to make the stone brick body 100 better engage with each other to form pulling during the stacking process, the cross-section of the locking groove 110 and the locking protrusion 120 arranged on the side of the stone brick body 100 in this embodiment is an arc-shaped structure, and the locking groove 110 and the locking protrusion 120 arranged on the side of the stone brick body 100 are located in the middle of the stone brick body 100. Through the mutual pulling of the locking protrusion 120 and the locking groove 110 in the middle of the stone brick body 100, the bricklaying stability is higher.

[0021] In production applications, the stone brick body 100 is formed by composite molding of porous mullite and cordierite. The porous mullite material has well-developed pores, and has good high temperature resistance and thermal insulation properties. As a thermal insulation material, it can effectively control the heat energy in the furnace and the materials participate in the heat energy conversion, so that the temperature in the furnace reaches the optimal state of thermal balance, and the thermal energy utilization rate reaches about 90%, thereby achieving the effect of increasing efficiency and reducing consumption. Cordierite can make the stone brick body 100 have a strong thermal shock resistance; at the same time, due to the process requirements of the activated carbon activation converter, steam is continuously injected into the furnace at all times, so the specific components in the furnace contain a large amount of moisture, resulting in extremely hot and cold temperatures in the furnace and acidic gases volatilized from the raw materials, so the internal environment of the activated converter is determined to be: stuffy, strong acid, extremely hot and cold. Cordierite is a neutral material with strong acid and alkali resistance, which greatly extends the service life of the kiln.

[0022] In production applications, the bonding mortar 200 includes powder and a binder. The binder uses Guangxi white mud as the main auxiliary material. The material has strong fluidity and good viscosity. The main and auxiliary materials are combined at high temperature to greatly improve their mechanical strength. The bonding mortar 200 is stirred by a beater before use. In the humid and low temperature environment of the carbonization rotary kiln 300, the bonding mortar 200 makes the stone bricks lining the inner wall of the rotary kiln 300 form a whole, and the bonding stability is improved, reducing the risk of loosening and falling off.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A cordierite mullite brick used in a rotary kiln, characterized in that: It comprises a stone brick body (100) arranged along the inner peripheral wall of the rotary kiln, A clamping groove (110) is provided at one end of the stone brick body (100), and a clamping protrusion (120) is provided on the outer side of the stone brick body (100) which is away from the clamping groove (110). The locking protrusions (120) and the locking grooves (110) are arranged at the same height, and when a plurality of stone brick bodies (100) are stacked in parallel, the locking grooves (110) and the locking protrusions (120) between adjacent stone brick bodies (100) are engaged with each other, and bonding mortar (200) is also filled between adjacent stone brick bodies (100).

2. The cordierite mullite brick used in a rotary kiln according to claim 1, characterized in that: The surface of the stone brick body (100) in contact with the inner wall of the rotary kiln is arranged in an arc shape.

3. The cordierite mullite brick used in a rotary kiln according to claim 1, characterized in that: The locking groove (110) and the locking protrusion (120) arranged on the side of the stone brick body (100) have arc-shaped cross-sections.

4. The cordierite mullite brick used in a rotary kiln according to claim 1, characterized in that: The locking groove (110) and the locking protrusion (120) arranged on the side of the stone brick body (100) are located in the middle of the stone brick body (100).

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