CN211120602U

CN211120602U - Prefabricated brick for composite lining of rotary kiln

Info

Publication number: CN211120602U
Application number: CN201921723395.2U
Authority: CN
Inventors: 路怀伟
Original assignee: Ningdong Aluminum Branch Of Qingtongxia Aluminum Industry Co ltd
Current assignee: Ningdong Aluminum Branch Of Qingtongxia Aluminum Industry Co ltd
Priority date: 2019-10-15
Filing date: 2019-10-15
Publication date: 2020-07-28
Anticipated expiration: 2029-10-15

Abstract

A prefabricated brick for a composite lining of a rotary kiln is formed by embedding and prefabricating a high-aluminum pouring material outer layer and a heat insulation inner layer light brick in a composite mode, wherein reinforced inner rib anchoring pieces are arranged in the high-aluminum pouring material outer layer and the heat insulation inner layer light brick, two semicircular grooves are formed in two large end faces of the prefabricated brick respectively, and male and female buckles are arranged on two small end faces of the prefabricated brick. The prefabricated brick saves time and materials in the construction of the composite lining of the rotary kiln, does not need any die plate, and can be constructed only by welding anchor hooks, laying light bricks and injecting high-alumina castable for vibration forming between the strip seams formed by the welded prefabricated bricks; the rotary kiln can not crack and fall off during the operation of the rotary kiln, and the service life of the rotary kiln lining can be greatly prolonged.

Description

Prefabricated brick for composite lining of rotary kiln

Technical Field

The utility model belongs to metallurgical industry stove production field, in particular to a prefabricated brick for the compound inside lining of rotary kiln.

Background

After the rotary kiln is introduced into China, the lining material is developed into an integral casting form with a light heat-insulating layer from the original full-heavy material casting, and a plurality of problems exist in the integral casting form. The earliest rotary kiln without the heat insulation layer has overhigh kiln coating temperature, great influence is caused on a barrel mechanism of the rotary kiln, and the condition that the whole kiln is damaged due to the fact that a large kiln barrel is distorted when the temperature of the rotary kiln coating is overhigh occurs. The integrally cast lining body with the light heat-insulating layer has an excessively wide construction gap in long-term use, hot coke particles invade into the lining body to damage the light heat-insulating layer, and finally the heat-insulating layer is washed out, so that the phenomenon that the lining body falls off and blocks fall off is finally caused. The common construction method of the castable lining of the rotary kiln is to weld a plurality of Y-shaped anchor hooks in the rotary kiln according to specified positions in advance, then evenly distribute a plurality of supporting templates, and then shake, mold and maintain one by one. The method has the disadvantages that after the first vibration molding is finished, the vibration molding of the adjacent one is carried out, the influence generated by resonance can be spread to the precast castable strip after the last vibration molding (the crystal growth of the precast castable strip at the moment is not completed yet), the structure of the molded precast castable strip is damaged, the construction difficulty is high, the labor intensity is high, and the cost for erecting the formwork is high.

Disclosure of Invention

The utility model discloses the purpose is in order to thoroughly solve the drawback that the construction of traditional full casting brought. Provides a prefabricated brick of a rotary kiln, which is used for a rotary kiln structure and is composed of a high-temperature resistant outer layer and a light heat-insulating inner layer.

The technical scheme for realizing the purpose of the utility model is as follows:

a prefabricated brick for a composite lining of a rotary kiln is formed by embedding and prefabricating a high-aluminum pouring material outer layer and a heat insulation inner layer light brick in a composite mode, wherein reinforced inner rib anchoring pieces are arranged in the high-aluminum pouring material outer layer and the heat insulation inner layer light brick, two semicircular grooves are formed in two large end faces of the prefabricated brick respectively, and male and female buckles are arranged on two small end faces of the prefabricated brick.

The prefabricated brick is cast and molded by a professional manufacturer, and the internal water is thoroughly removed through low-temperature calcination at 450 ℃. The lightweight brick has high strength and good heat preservation performance, and after high-temperature calcination at 1000 ℃ before leaving a factory, the high-temperature linear change can not have large change in the later normal use, and the linear change rate after calcination is particularly stable. The light brick is filled with casting material around the light brick during construction, and the burnt coke particles can not damage the light brick. Stainless steel anchor pieces are pre-embedded in the kiln cover, and can be welded on the kiln cover for construction conveniently, so that the construction period can be effectively shortened.

The technical effects of the utility model are mainly embodied in that:

1. the prefabricated brick saves time and materials in the construction of the composite lining of the rotary kiln, does not need any die plate, and can be constructed only by welding anchor hooks, laying light bricks and injecting high-alumina castable for vibration forming between the strip seams formed by the welded prefabricated bricks;

2. because the construction is carried out between two precast bricks which are roasted at low temperature, the vibration impact on the adjacent castable can not be generated, so the integrity of the kiln lining can be well ensured by adopting the construction of the precast brick composite lining;

3. the rotary kiln does not crack and fall off during operation, so that the service life of the rotary kiln lining can be greatly prolonged;

4. the side surfaces of the precast bricks are provided with the semicircular grooves and the male and female snap buttons, so that a castable ramming layer can be effectively stabilized, high-temperature calcined petroleum coke can be prevented from entering a light heat-insulating layer from gaps, and the pulverization phenomenon (namely, rat holing) of a light layer is effectively avoided;

5. the prefabricated brick composite lining is made of refractory high-temperature resistant materials, the initial temperature and the expansion coefficient of thermal expansion are very similar, physical conditions of mutual dislocation damage are avoided, the prefabricated bricks can stably run, the prefabricated bricks with elaborately made high-temperature resistance are primarily baked in a special furnace, and the performance is particularly stable in use.

6. When the castable is used in a rotary kiln, defect extension and structure transformation can not occur any more, and only volume change caused by thermal expansion and cold contraction exists, so that an unscientific way that the structure of a formed castable precast strip is damaged due to resonance in the integral casting process is fundamentally avoided.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is the construction structure diagram of the utility model.

In the figure: 1. the inner reinforcement anchor 2, the heat insulation inner layer light brick 3, the high-alumina casting material outer layer 4, the semicircular groove 5, the male-female snap fastener 6 and the casting material.

Detailed Description

The concrete implementation mode of the composite lining of the prefabricated brick rotary kiln of the utility model is explained by combining the attached drawings.

As shown in figure 1, the prefabricated brick for the composite lining of the rotary kiln is formed by wrapping a high-aluminum casting material outer layer 3 and embedding and compositely prefabricating a heat insulation inner layer light brick 2, reinforced inner rib anchoring parts 1 are arranged in the high-aluminum casting material outer layer 3 and the heat insulation inner layer light brick 2, two large end faces of the prefabricated brick are respectively provided with a semicircular groove 4, and two small end faces of the prefabricated brick are provided with a male-female snap fastener 5.

Two reinforced inner bar anchoring parts 1 are arranged in the high-aluminum pouring material outer layer 3 and the heat insulation inner layer light brick 2, and the shape is W-shaped.

The semicircular grooves 4 are formed in the positions, away from the lower bottom surface 1/3, of the two sides of the large-surface end of the prefabricated brick, and the radius of each semicircular groove 4 is 20 mm.

The top of the reinforced inner bar anchoring part 1 is located at the position, away from the lower bottom surface 3/4, of the prefabricated brick, the lower part of the reinforced inner bar anchoring part extends out of two sides of the large end surface of the prefabricated brick by 30 mm, the diameter of ribs of the reinforced inner bar anchoring part is 10 mm or 12 mm, and the reinforced inner bar anchoring part is made of 304 stainless steel.

The material of the high-aluminum casting material outer layer 3 is DAG-70 high-aluminum casting material, and the material of the heat-insulating and heat-preserving inner layer light brick is DQ-1.2 light brick.

As shown in figure 2, the utility model discloses should construct according to following process when the rotary kiln construction is installed:

1. the lines are equally divided into even numbers in the kiln.

2. And installing and welding prefabricated bricks at the designated positions.

3. And welding the V-shaped anchor hooks on the inner wall of the rotary kiln in a staggered manner.

4. Pouring the pouring material into the middle groove of the precast brick (the heat-insulating layer adopts light bricks).

5. And after the curing is finished, heating according to a kiln drying curve.

Of course, the above is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and any structural changes that can be made by simple modification of the claims, the description and the drawings of the present invention are all within the scope of the present invention.

Claims

1. A prefabricated brick for a composite lining of a rotary kiln is characterized in that: the composite heat-insulating brick is formed by embedding and compounding a high-aluminum pouring material outer layer and a heat-insulating inner layer light brick in a prefabrication mode, reinforced inner rib anchoring parts are arranged between the high-aluminum pouring material outer layer and the light brick inner layer, two large end faces of the prefabricated brick are respectively provided with a semicircular groove, and two small end faces of the prefabricated brick are provided with a male-female snap fastener.

2. The prefabricated brick for the composite lining of the rotary kiln as claimed in claim 1, which is characterized in that: two reinforced inner bar anchoring parts are arranged in the high-aluminum pouring material outer layer and the heat insulation inner layer light brick, and the shape of each reinforced inner bar anchoring part is W-shaped.

3. The prefabricated brick for the composite lining of the rotary kiln as claimed in claim 1, which is characterized in that: the semicircular grooves are formed in the positions, away from the lower bottom surface 1/3, of the two sides of the large-surface end of the prefabricated brick, and the radius of each semicircular groove is 20 mm.

4. The prefabricated brick for the composite lining of the rotary kiln as claimed in claim 1, which is characterized in that: the top of the reinforced inner rib anchoring piece is located at the position, away from the lower bottom surface 3/4, of the prefabricated brick, the lower portion of the reinforced inner rib anchoring piece extends out of two sides of the large end surface of the prefabricated brick for 30 mm, the diameter of ribs of the reinforced inner rib anchoring piece is 10 mm or 12 mm, and the reinforced inner rib anchoring piece is made of 304 stainless steel.

5. The prefabricated brick for the composite lining of the rotary kiln as claimed in claim 1, which is characterized in that: the material of the high-aluminum casting material outer layer is DAG-70 high-aluminum casting material, and the material of the heat-insulating and heat-preserving inner layer light brick is DQ-1.2 light brick.