Combined brick for lining of rotary kiln

Abstract

The utility model relates to the technical field of rotary kiln lining bricks, in particular to a rotary kiln lining combined brick. The rotary kiln lining combined brick is characterized by comprising a first-stage working layer, a first-stage heat insulation layer, a second-stage working layer and a second-stage heat insulation layer, a first-stage working layer dovetail groove is formed below the first-stage working layer, a first-stage heat insulation layer dovetail boss is arranged on the first-stage heat insulation layer, a first-stage working layer connecting dovetail boss is arranged on the outer side of the vertical wall of the first-stage working layer, and a second-stage working layer connecting dovetail boss is arranged on the outer side of the vertical wall of the second-stage working layer. A first-stage heat insulation layer bottom connecting block is arranged on the outer side of the first-stage heat insulation layer vertical wall, the first-stage working layer is connected with the first-stage heat insulation layer through a first-stage heat insulation layer dovetail boss, the second-stage working layer is connected with the first-stage working layer through a second-stage working layer upper connecting block, and the second-stage working layer is connected with the second-stage heat insulation layer through a second-stage heat insulation layer dovetail boss. The working layer and the heat insulation layer of the refractory brick are separately formed, sintered and then assembled, so that the material performance optimization is realized, and the condition that the heat insulation layer shrinks and deforms after the composite brick is sintered at high temperature is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary kiln lining bricks, in particular to rotary kiln lining composite bricks. Background Art

[0002] Taking the rotary kiln lining masonry as an example, the existing masonry methods include direct masonry of a single material; multi-material multi-layer masonry; and direct masonry of two materials in the form of composite bricks. The above masonry methods are greatly affected by the material of refractory bricks, masonry structure and kiln working conditions:

[0003] 1) For example, direct masonry of a single material, such as the magnesium-aluminum spinel bricks used in the transition zone of a 5,000-ton cement kiln per day, the high thermal conductivity of the material leads to a large heat dissipation loss in the kiln body, which increases energy consumption. Replacing with silica-molybdenum bricks will reduce the thermal conductivity of the material, but will lead to a reduction in the service life of the lining and increase the frequency of kiln maintenance.

[0004] 2) Multi-layer masonry with multiple materials. Double-layer masonry is more common in titanium dioxide rotary kilns and lime rotary kilns. First, a heat-insulating layer is built, and then a working layer is built. The masonry is inconvenient, the integrity is not strong, and during the operation of the rotary kiln, the heat-insulating layer and the working layer will wear out and become empty, resulting in the lining falling off and being damaged.

[0005] 3) The two materials are directly laid in the form of composite bricks. Although this structure reduces the thermal conductivity without affecting the performance of the working layer, there is a problem of inconsistent sintering temperatures between the working layer and the insulation layer. When the firing temperature is increased, the working layer reaches the sintering temperature, but the insulation layer shrinks significantly and the size cannot be guaranteed; when the firing temperature is lowered, the size of the insulation layer is guaranteed, but the working layer does not reach the sintering temperature, and the performance of the working layer cannot be guaranteed. Utility Model Content

[0006] In view of the above deficiencies in the prior art, the purpose of the utility model is to provide a rotary kiln lining composite brick, which is divided into a working layer (refractory layer) and a heat insulation layer (thermal insulation layer). The working layer and the heat insulation layer are sintered within their own sintering ranges respectively to give full play to the material properties. After sintering, they are assembled, and the working layer and the heat insulation layer are bonded together with a high-temperature adhesive. Finally, the rotary kiln lining is built.

[0007] The utility model is realized by adopting the following technical solutions:

[0008] The rotary kiln lining composite brick is characterized in that it includes a primary working layer, a primary heat insulation layer, a secondary working layer and a secondary heat insulation layer, a primary working layer dovetail groove is provided below the primary working layer, a primary heat insulation layer dovetail boss is provided on the primary heat insulation layer, a primary working layer connecting dovetail boss is provided on the outer side of the vertical wall of the primary working layer, a primary heat insulation layer bottom connecting block is provided on the outer side of the vertical wall of the primary heat insulation layer, the primary working layer is connected to the primary heat insulation layer through the primary heat insulation layer dovetail boss, the secondary working layer is connected to the primary working layer through the secondary working layer upper connecting block, and the secondary working layer is connected to the secondary heat insulation layer through the secondary heat insulation layer dovetail boss.

[0009] The dovetail groove of the working layer is used in conjunction with the dovetail boss of the insulation layer to strengthen the connection strength between the working layer and the insulation layer; the first-level working layer connecting dovetail boss is used in conjunction with the dovetail groove of the second-level working layer during the masonry process to strengthen the connection strength between different combination bricks.

[0010] The dovetail boss of the primary heat insulation layer is connected to the secondary heat insulation layer through a bottom connecting block of the primary heat insulation layer, and a groove matching with the bottom connecting block of the primary heat insulation layer is provided on the secondary heat insulation layer.

[0011] The secondary working layer is provided with a secondary working layer dovetail groove, and the secondary working layer dovetail groove is located on a side away from the upper connecting block of the secondary working layer.

[0012] A groove is provided at the connection between the primary working layer and the upper connecting block of the secondary working layer, which is used in conjunction with the upper connecting block of the secondary working layer. The primary working layer connecting dovetail boss is located on a side away from the upper connecting block of the secondary working layer.

[0013] The primary heat-insulating layer is connected to the primary assembly-connecting layer via a primary connection support column, and the secondary heat-insulating layer is connected to the secondary assembly-connecting layer via a secondary connection support column.

[0014] The secondary assembly connection layer is provided with a secondary assembly connection layer boss, the secondary assembly connection layer is connected to the primary assembly connection layer through the secondary assembly connection layer boss, and the primary assembly connection layer is provided with a groove used in conjunction with the secondary assembly connection layer boss.

[0015] The setting of the bottom connecting block of the primary insulation layer and the upper connecting block of the secondary working layer is used to avoid the occurrence of loose sealing due to thermal expansion and contraction during the use of the rotary kiln; the setting of the boss of the secondary assembly connecting layer is used to strengthen the connection strength inside the combined bricks.

[0016] The length of the rotary kiln lining composite brick is 380-460mm, the height is 420-480mm, and the thickness is 90-110mm; the length of the upper bottom side of the dovetail boss of the insulation layer is 124-128mm, and the length of the lower bottom side of the dovetail boss of the insulation layer is 115-119mm.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The utility model adopts the composite bricks for the lining of the rotary kiln, which are divided into a working layer (refractory layer) and a heat insulation layer (insulation layer). The working layer and the heat insulation layer are sintered in their own sintering ranges respectively, giving full play to the material performance. After sintering, they are assembled, and the working layer and the heat insulation layer are bonded together with a high-temperature adhesive, and finally the lining of the rotary kiln is built; the refractory brick working layer and the heat insulation layer are formed separately, fired separately, and assembled after sintering to achieve the optimization of material performance and solve the problem of shrinkage and deformation of the heat insulation layer after high-temperature sintering of the composite brick; through the working layer and the heat insulation layer, ... bonded together with a high-temperature adhesive, and finally the lining of the rotary kiln is built. The first layer dovetail groove is used in conjunction with the dovetail boss of the insulation layer to strengthen the connection strength between the working layer and the insulation layer; the first-level working layer connection dovetail boss is used in conjunction with the second-level working layer dovetail groove during the masonry process to strengthen the connection strength between different combination bricks; the setting of the first-level insulation layer bottom connection block and the second-level working layer upper connection block is used to avoid the occurrence of loose sealing due to thermal expansion and contraction during the use of the rotary kiln; the setting of the second-level assembly connection layer boss is used to strengthen the connection strength inside the combination bricks. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of the rotary kiln lining composite brick of the utility model;

[0020] Figure 2 This is a structural schematic diagram of one side of the first-level working layer of the utility model;

[0021] Figure 3 This is a structural schematic diagram of one side of the secondary working layer of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the rotary kiln lining composite brick after masonry;

[0023] In the figure: 1. first-level working layer; 2. first-level thermal insulation layer; 3. first-level assembly connection layer; 4. first-level working layer dovetail groove; 5. first-level thermal insulation layer dovetail boss; 6. first-level connection support column; 7. second-level working layer; 8. first-level thermal insulation layer bottom connection block; 9. second-level assembly connection layer boss; 10. second-level working layer upper connection block; 11. second-level working layer dovetail groove; 12. second-level thermal insulation layer; 13. second-level assembly connection layer; 14. second-level thermal insulation layer dovetail boss; 15. first-level working layer connection dovetail boss; 16. second-level connection support column. DETAILED DESCRIPTION

[0024] In order to make the purpose and technical solution of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings.

[0025] Example 1

[0026] like Figure 1 As shown, the rotary kiln lining composite brick comprises a primary working layer 1, a primary heat insulation layer 2, a secondary working layer 7 and a secondary heat insulation layer 12, a primary working layer dovetail groove 4 is provided below the primary working layer 1, a primary heat insulation layer dovetail boss 5 is provided on the primary heat insulation layer 2, a primary working layer connecting dovetail boss 15 is provided on the outer side of the vertical wall of the primary working layer 1, a primary heat insulation layer bottom connecting block 8 is provided on the outer side of the vertical wall of the primary heat insulation layer 2, the primary working layer 1 is connected to the primary heat insulation layer 2 through the primary heat insulation layer dovetail boss 5, the secondary working layer 7 is connected to the primary working layer 1 through the secondary working layer upper connecting block 10, and the secondary working layer 7 is connected to the secondary heat insulation layer 12 through the secondary heat insulation layer dovetail boss 14. The working layer dovetail groove is used in conjunction with the heat insulation layer dovetail boss to strengthen the connection strength between the working layer and the heat insulation layer; the primary working layer connecting dovetail boss 15 is used in conjunction with the secondary working layer dovetail groove 11 during the masonry process to strengthen the connection strength between different composite bricks. The primary insulation layer dovetail boss 5 is connected to the secondary insulation layer 12 through the primary insulation layer bottom connection block 8, and the secondary insulation layer 12 is provided with a groove that matches the primary insulation layer bottom connection block 8. The secondary working layer 7 is provided with a secondary working layer dovetail groove 11, and the secondary working layer dovetail groove 11 is located on the side away from the secondary working layer upper connection block 10. The connection between the primary working layer 1 and the secondary working layer upper connection block 10 is provided with a groove, which is used in conjunction with the secondary working layer upper connection block 10, and the primary working layer connection dovetail boss 15 is located on the side away from the secondary working layer upper connection block 10. The primary insulation layer 2 is connected to the primary assembly connection layer 3 through the primary connection support column 6, and the secondary insulation layer 12 is connected to the secondary assembly connection layer 13 through the secondary connection support column 16. The secondary assembly connection layer 13 is provided with a secondary assembly connection layer boss 9, and the secondary assembly connection layer 13 is connected to the primary assembly connection layer 3 through the secondary assembly connection layer boss 9, and the primary assembly connection layer 3 is provided with a groove used in conjunction with the secondary assembly connection layer boss 9. The length of the rotary kiln lining composite brick is 380mm, the height is 420mm, and the thickness is 90mm; the length of the upper bottom side of the dovetail boss of the insulation layer is 124mm, and the length of the lower bottom side of the dovetail boss of the insulation layer is 115mm.

[0027] Example 2

[0028] like Figure 1As shown, the rotary kiln lining composite brick comprises a primary working layer 1, a primary heat insulation layer 2, a secondary working layer 7 and a secondary heat insulation layer 12, a primary working layer dovetail groove 4 is provided below the primary working layer 1, a primary heat insulation layer dovetail boss 5 is provided on the primary heat insulation layer 2, a primary working layer connecting dovetail boss 15 is provided on the outer side of the vertical wall of the primary working layer 1, a primary heat insulation layer bottom connecting block 8 is provided on the outer side of the vertical wall of the primary heat insulation layer 2, the primary working layer 1 is connected to the primary heat insulation layer 2 through the primary heat insulation layer dovetail boss 5, the secondary working layer 7 is connected to the primary working layer 1 through the secondary working layer upper connecting block 10, and the secondary working layer 7 is connected to the secondary heat insulation layer 12 through the secondary heat insulation layer dovetail boss 14. The primary heat insulation layer dovetail boss 5 is connected to the secondary heat insulation layer 12 through the primary heat insulation layer bottom connecting block 8, and the secondary heat insulation layer 12 is provided with a groove matching with the primary heat insulation layer bottom connecting block 8. The secondary working layer 7 is provided with a secondary working layer dovetail groove 11, which is located on the side away from the secondary working layer upper connection block 10. A groove is provided at the connection between the primary working layer 1 and the secondary working layer upper connection block 10, which is used in conjunction with the secondary working layer upper connection block 10, and the primary working layer connection dovetail boss 15 is located on the side away from the secondary working layer upper connection block 10. The primary insulation layer 2 is connected to the primary assembly connection layer 3 through the primary connection support column 6, and the secondary insulation layer 12 is connected to the secondary assembly connection layer 13 through the secondary connection support column 16. The secondary assembly connection layer 13 is provided with a secondary assembly connection layer boss 9, and the secondary assembly connection layer 13 is connected to the primary assembly connection layer 3 through the secondary assembly connection layer boss 9, and the primary assembly connection layer 3 is provided with a groove used in conjunction with the secondary assembly connection layer boss 9. The setting of the bottom connection block 8 of the primary insulation layer and the upper connection block 10 of the secondary working layer is used to avoid the occurrence of loose sealing due to thermal expansion and contraction during the use of the rotary kiln; the setting of the secondary assembly connection layer boss 9 is used to strengthen the connection strength inside the combined brick. The length of the rotary kiln lining combined brick is 460mm, the height is 480mm, and the thickness is 110mm; the upper bottom edge length of the insulation layer dovetail boss is 128mm, and the lower bottom edge length of the insulation layer dovetail boss is 119mm.

Claims

1. A rotary kiln lining composite brick, characterized in that: The invention comprises a primary working layer (1), a primary heat insulation layer (2), a secondary working layer (7) and a secondary heat insulation layer (12); a primary working layer dovetail groove (4) is provided below the primary working layer (1); a primary heat insulation layer dovetail boss (5) is provided on the primary heat insulation layer (2); a primary working layer connecting dovetail boss (15) is provided on the outer side of the vertical wall of the primary working layer (1); a primary heat insulation layer bottom connecting block (8) is provided on the outer side of the vertical wall of the primary heat insulation layer (2); the primary working layer (1) is connected to the primary heat insulation layer (2) via the primary heat insulation layer dovetail boss (5); the secondary working layer (7) is connected to the primary working layer (1) via the secondary working layer upper connecting block (10); and the secondary working layer (7) is connected to the secondary heat insulation layer (12) via the secondary heat insulation layer dovetail boss (14).

2. The rotary kiln lining composite brick according to claim 1, characterized in that: The dovetail boss (5) of the primary insulation layer is connected to the secondary insulation layer (12) via the bottom connection block (8) of the primary insulation layer, and the secondary insulation layer (12) is provided with a groove that matches the bottom connection block (8) of the primary insulation layer.

3. The rotary kiln lining composite brick according to claim 1, characterized in that: The secondary working layer (7) is provided with a secondary working layer dovetail groove (11), and the secondary working layer dovetail groove (11) is located on a side away from the upper connecting block (10) of the secondary working layer.

4. The rotary kiln lining composite brick according to claim 1, characterized in that: A groove is provided at the connection between the primary working layer (1) and the upper connecting block (10) of the secondary working layer, and is used in conjunction with the upper connecting block (10) of the secondary working layer. The primary working layer connecting dovetail boss (15) is located on a side away from the upper connecting block (10) of the secondary working layer.

5. The rotary kiln lining composite brick according to claim 1, characterized in that: The primary heat insulation layer (2) is connected to the primary assembly connection layer (3) via a primary connection support column (6), and the secondary heat insulation layer (12) is connected to the secondary assembly connection layer (13) via a secondary connection support column (16).

6. The rotary kiln lining composite brick according to claim 5, characterized in that: The secondary assembly connection layer (13) is provided with a secondary assembly connection layer boss (9), the secondary assembly connection layer (13) is connected to the primary assembly connection layer (3) via the secondary assembly connection layer boss (9), and the primary assembly connection layer (3) is provided with a groove for use with the secondary assembly connection layer boss (9).

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