Anti-stripping aluminum oxide hollow sphere brick and preparation process thereof

Abstract

The invention discloses an anti-stripping aluminum oxide hollow sphere brick and a preparation process thereof, and aims to provide an anti-stripping aluminum oxide hollow sphere brick with strong anti-stripping performance and improved preparation efficiency and a preparation process of the anti-stripping aluminum oxide hollow sphere brick. The brick comprises a brick body, and the brick body is composed of alumina hollow spheres with three particle sizes of 0.5-1 mm, 1-2 mm and 2-3 mm, 3%-5% of a binding agent and 0.5%-1% of a lubricant. The grading proportion of the aluminum oxide hollow spheres with the particle size is 6: 3: 1, the binding agent adopts aluminum sol, and the lubricating agent can adopt zinc stearate; the surface of the brick body is coated with the anti-stripping layer, and the anti-stripping layer comprises 60% of mullite powder (the particle size is smaller than or equal to 5 microns), 30% of alumina sol, 5% of a dispersing agent (such as polycarboxylate) and 5% of water. The aluminum oxide hollow ball brick has the beneficial effects that the brick body of the aluminum oxide hollow ball brick has anti-stripping performance; the preparation device has integrated high-efficiency preparation process efficiency; the brick body cleaning efficiency of the preparation device is improved; the drying uniformity and the operation smoothness of the preparation device are improved; the automation degree and the operation stability are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of alumina hollow ball brick preparation, and particularly relates to an anti-peeling alumina hollow ball brick and a preparation process thereof. BACKGROUND

[0002] The alumina hollow ball brick is a kind of high-temperature heat-insulating material with a wide application, and has good high-temperature resistance and heat-insulating properties, and is used for heat preservation and heat insulation in a high-temperature kiln.

[0003] Chinese Patent Authorization Publication No. CN 111873131 A, authorized on November 3, 2020, proposes a kind of device and its preparation method for preparing alumina hollow ball brick, characterized by: the specific preparation steps of alumina hollow ball brick are as follows: S1: take glucose solution and place it in a reaction kettle, stir and mix and keep warm, collect the reaction liquid and centrifugal separation, collect the lower sediment and wash to obtain washed granules, dry to obtain dry template granules;S2: take ethanol solution, aluminum nitrate solution and dry template granules and place them in a triangular flask, collect the dispersion liquid by ultrasonic dispersion and place it at room temperature for standing, filter and collect the filter cake, dry to obtain dry composite granules and place them in a tube furnace, heat and keep warm and calcine, cool to room temperature after standing, obtain alumina hollow microsphere particles;S3: take silicon dioxide, alumina, quicklime, magnesium oxide, potassium oxide and sodium oxide and place them in a ball mill jar, ball mill and collect the ball mill powder, place the ball mill powder in a muffle furnace, melt after keeping warm, water quenching treatment and crushing and grinding;S4: take alumina powder, alumina hollow microsphere particles, coating slurry, clay and place them in a stirrer, stir and mix and pour into a mold, naturally dry, then dry in a tunnel dryer, and then sinter to form the alumina hollow ball brick.The application has the following deficiencies: when rapidly cooling and rapidly heating, the surface and the interior of the brick body have a large temperature difference, stress cracks are generated, and the surface layer peels off.In summary, the existing alumina hollow ball brick body preparation process has the disadvantages of easy peeling and low preparation efficiency. SUMMARY

[0004] The present application is to overcome the deficiencies of the prior art, such as the alumina hollow ball brick body being easy to peel and having low preparation efficiency, and provides an anti-peeling alumina hollow ball brick with strong anti-peeling performance and improved preparation efficiency, and a preparation process thereof.

[0005] In order to achieve the above-mentioned purpose, the following technical solutions are adopted in the present application: An anti-peeling alumina hollow ball brick comprises The brick body is made of 0.5-1 mm, 1-2 mm, 2-3 mm three kinds of particle size alumina hollow spheres, 3%-5% binder and 0.5%-1% lubricant; The particle size alumina hollow sphere is graded in a ratio of 6:3:1, the binder is aluminum sol, and the lubricant is zinc stearate; The anti-stripping layer is coated on the surface of the brick body, and the anti-stripping layer comprises 60% mullite powder (particle size ≤5 μm) + 30% aluminum sol + 5% dispersant (such as polycarboxylate) + 5% water.

[0006] The alumina hollow sphere brick comprises a base material of the brick body and a binder plus a lubricant through mixing, wherein the particle size alumina hollow sphere is graded in a ratio of 6:3:1 to improve the bulk density, the aluminum sol enhances the strength of the brick body and prevents cracking in the mixing, and the lubricant reduces friction to improve the forming density; the anti-stripping layer is coated on the surface of the brick body to further improve the anti-stripping performance, and the mullite powder, the aluminum sol, the dispersant and the water are matched to match the thermal expansion coefficient with the alumina. The alumina hollow sphere brick with high density, cracking prevention and anti-stripping performance is achieved.

[0007] An anti-stripping alumina hollow sphere brick preparation process comprises the following steps: Step one: mixing: put the alumina hollow sphere, the binder and the lubricant into a high-speed mixer for stirring and mixing; Step two: forming: put the mixed material after stirring into a rubber mold, and put the rubber mold into a wet bag type isostatic pressing machine for forming; Step three: drying: dry the formed brick in a natural environment for 8-11 hours; Step four: drying: dry in a drying oven at 110-140°C for 16-20 hours; Step five: heat preservation: heat preservation at 1600°C for 8h in a heat preservation oven; Step six: surface cleaning: remove the dust on the surface of the brick body with an anti-stripping device; Step seven: adhesion treatment: spray sand on the brick body with a pneumatic sand blasting machine, and then heat to 80-120°C; Step eight: spraying: spray the anti-stripping layer on the brick body with the anti-stripping device to form the anti-stripping alumina hollow sphere brick.

[0008] Put 0.5~1 mm, 1~2 mm, 2~3 mm of three kinds of particle size of alumina hollow sphere, 3%~5% binder and 0.5%~1% lubricant into the high-speed blender to stir and mix the materials, so that the brick body is mixed into a preliminary brick; Put the mixed material into the rubber mold, load the mixed material into the rubber mold, apply 100~200 MPa isostatic pressure, the density of the static pressure body is uniform, the strength is high, and the anti-stripping performance is enhanced; The formed brick is dried in the natural environment for 8~11 hours; Dry in the drying oven at 110℃~140℃ for 16~20 hours; Keep warm at 1600℃ for 8 hours in the heat preservation box; Use the anti-stripping device to remove dust, oil stains and impurities on the surface of the brick body by blowing and cleaning; Use the air pressure sand blasting machine to sand the brick body, use light sand blasting (such as 80-120 mesh corundum sand, pressure 0.2-0.4 MPa) to increase the surface roughness (Ra 3-5 μm) and enhance the adhesion of the coating; Heat the brick body to 80~120℃ to ensure the surface is dry; Use the anti-stripping device to apply multiple thin coatings to the brick body, so that the coating (mullite powder, aluminum sol, dispersing agent and water mixed solvent) is sprayed to form an anti-stripping layer, and the alumina hollow sphere brick with anti-stripping performance is made, and the anti-stripping performance process treatment is concentrated through the anti-stripping device during preparation to improve the process efficiency.

[0009] As preferred, the anti-stripping device includes a workbench and a box body, the box body is connected with the workbench, and the box body is provided with a blowing cavity, a cleaning cavity, a drying cavity and a coating cavity. The box body is connected to the workbench in the anti-stripping device, the brick body enters the blowing cavity in sequence to treat the surface dust, removes the impurities and oil stains in the cleaning cavity, and dries in the drying cavity. After the pretreatment of the brick body, the coating cavity is entered for coating to complete the enhancement of the anti-stripping performance, and the integrated centralized treatment of the brick body is realized through the anti-stripping device, and the process efficiency of the preparation of the stripping alumina hollow sphere brick is improved.

[0010] As preferred, the blowing cavity is connected with an air inlet pipe and a plurality of fan supports, the fan supports are connected with the wall of the blowing cavity, the air inlet pipe is connected with the fan supports, the bottom of the blowing cavity is provided with an air outlet, and the air outlet is detachably connected with a dust collecting net. The air inlet pipe is connected with a compressed air machine to input compressed air into the blowing cavity through the air inlet pipe, so that the compressed air can clean the dust on the surface of the brick body. The bottom of the blowing cavity is of an open structure and is provided with an air outlet. The dust collecting net is arranged at the air outlet to collect dust and impurities, so that the continuous cleaning and the accumulation of dust on the brick body can be avoided. The effect of improving the cleaning efficiency of the brick body is achieved.

[0011] As preferred, the air outlet is provided with a fixing groove, the dust collecting net is connected with a mounting frame, the mounting frame is connected with a buckle, and the buckle is connected with the fixing groove. The dust collecting net is fixed by the buckle on the mounting frame into the fixing groove, so that the dust collecting net can be easily assembled and disassembled on the box body. The effect of quick cleaning and continuous dust removal is achieved.

[0012] As preferred, the cleaning cavity is connected with a cleaning pool, the cleaning pool is connected with a material soaking frame, the material soaking frame is connected with a moving rod, the cleaning pool is connected with a guide slide rail, the moving rod is movably connected with the guide slide rail, and the moving rod is connected with a lifting rod. The cleaning pool is arranged in the cleaning cavity to contain cleaning liquid, so that the brick body is cleaned to remove oil stains and impurities, and the front surface is kept clean before roughening, thereby achieving the effect of efficiently cleaning the brick body.

[0013] As preferred, the drying cavity is connected with a support plate, a plurality of electric heating pipes are installed on the inner wall of the drying cavity, the upper end of the support plate is connected with a plurality of support vertical rods, the lower end of the support plate is connected with a conveying rod, the workbench is connected with a transition plate, the transition plate is provided with a discharging groove, and the conveying rod is slidably connected with the discharging groove. The support plate is arranged in the drying cavity to place the brick body through the support vertical rods, so that the contact area of the brick body is reduced and the surface can be dried by heat as much as possible, and the conveying rod can smoothly enter and exit the drying cavity, thereby achieving the effects of improving drying uniformity and work smoothness.

[0014] As preferred, the coating cavity is connected with a material turning frame, a spray gun frame and an electric heating pipe II, the material turning frame is rotatably connected with the coating cavity, the material turning frame is elastically connected with a material clamping rod, the spray gun frame is arranged on one side of the material clamping rod, the spray gun frame is movably connected with the coating cavity, and the spray gun frame is connected with a placing slot. The rotation of the material turning frame enables the brick body on the material clamping rod to rotate synchronously, so that the spray gun in the placing slot of the spray gun frame can be efficiently sprayed, and the heating pipe dries the brick body after each spraying, thereby achieving the effect of further enhancing the anti-peeling performance.

[0015] As preferred, the box body is connected with a rotating mechanism, the box body is provided with a through hole, a rotating rod is inserted into the through hole, the rotating mechanism is connected with the rotating rod, and one end of the material turning frame is connected with the rotating rod. The rotating mechanism is installed on the outside of the box body and connected with the rotating rod inserted into the through hole to drive the rotating rod to rotate, and then the material turning frame rotates. This achieves the effects of improving the degree of automation and work stability.

[0016] As preferred, the other end of the material turning frame is provided with a connecting barrel, an elastic mechanism is connected in the connecting barrel, the material clamping rod is inserted into the connecting barrel, one end of the elastic mechanism is connected with the material clamping rod, and the other end of the material clamping rod is connected with a buffer pad. The other end of the material turning frame is inserted with the material clamping rod through the connecting barrel, and the elastic mechanism in the connecting barrel connects the material clamping rod, so that the material clamping rod can stably and elastically move on the material turning frame, thereby facilitating the quick placement and removal of the brick body, and the buffer pad is made of soft material to protect the brick body. This achieves the effects of improving work stability and preparation process efficiency.

[0017] The beneficial effects of the present application are: the brick body of the alumina hollow ball brick has anti-peeling property; the preparation device has integrated high-efficiency preparation process efficiency; the preparation device improves the cleaning efficiency of the brick body; the preparation device improves the drying uniformity and operation fluency; and the automation degree and operation stability are improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the flowchart of the preparation process of the anti-peeling alumina hollow ball brick; Figure 2 is the structural diagram of the anti-peeling device; Figure 3 is the structural diagram of the inside of the blowing cavity; Figure 4 is the structural diagram of the inside of the cleaning cavity; Figure 5 is the structural diagram of the inside of the drying cavity; Figure 6 is the structural diagram of the inside of the coating cavity; Figure 7 is the structural diagram of the connection of the material clamping rod and the connecting cylinder.

[0019] In the figure: 1. workbench, 2. box, 3. blowing cavity, 4. cleaning cavity, 5. drying cavity, 6. coating cavity, 7. air inlet cylinder, 8. fan support, 9. air outlet, 10. dust collection net, 11. fixed groove, 12. mounting frame, 13. buckle, 14. cleaning pool, 15. material immersion frame, 16. moving rod, 17. guide slide rail, 18. lifting rod, 19. support plate, 20. electric heating pipe one, 21. support vertical rod, 22. conveying rod, 23. transition plate, 24. discharge recess, 25. material turning frame, 26. spray gun frame, 27. electric heating pipe two, 28. material clamping rod, 29. placement slot, 30. rotating mechanism, 31. through hole, 32. rotating rod, 33. connecting cylinder, 34. elastic mechanism, 35. buffer pad, 36. bearing. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0022] The relative arrangement of parts, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the present application unless otherwise specifically stated. Spatially relative terms, such as "upper", "lower", "left", "right", and the like, are used herein for ease of description to explain the orientation of one element or feature to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device described herein is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or located in any other orientation) and the spatially relative descriptors used herein interpreted accordingly. It will also be understood that, when a part is referred to as being "on" another part, it can be directly on the other part or intervening parts can also be present. In addition, the drawings can not be drawn to scale and the dimensions of the various parts can be exaggerated relative to each other for purposes of explanatory clarity and instruction like. Techniques, processes, and apparatuses known to one of ordinary skill in the relevant art can not be discussed in detail if they are not considered necessary for an enabling description of the present application. In all examples shown and discussed herein, any particular value is to be interpreted as merely an example and not a limitation. Thus, other examples of the exemplary embodiments can have different values. It is to be noted that like reference numerals and letters refer to like items in the drawings, and once an item is defined in one drawing, it need not be discussed further in subsequent drawings.

[0023] In addition, it should be noted that the use of "first", "second", and the like words of distinction do not carry special meaning and are used only to distinguish one part from another unless otherwise stated. Thus, these words are not to be construed as limiting the scope of the present application.

[0024] Example 1: An anti-peeling alumina hollow ball brick comprises a brick body, the brick body is made of 0.5-1 mm, 1-2 mm, 2-3 mm alumina hollow balls, 3%-5% binder and 0.5%-1% lubricant; the gradation ratio of the alumina hollow balls is 6:3:1, the binder is alumina sol, and the lubricant is zinc stearate; an anti-peeling layer is coated on the surface of the brick body, and the anti-peeling layer comprises 60% mullite powder (particle size ≤5 μm) + 30% alumina sol + 5% dispersant (such as polycarboxylate) + 5% water.

[0025] As shown in Figure 1 , the application also provides a preparation process of the anti-peeling alumina hollow ball brick, comprising the following steps: Step one: mixing: alumina hollow balls, binder and lubricant are put into a high-speed mixer for stirring and mixing; Step two: forming: the mixed material after stirring is put into a rubber mold, and the rubber mold is put into a wet bag type isostatic pressing machine for forming; Step three: drying: the formed brick is dried in a natural environment for 8-11 hours; Step four: drying: drying in a drying oven at 110-140 ℃ for 16-20 hours; Step five: heat preservation: heat preservation at 1600 ℃ for 8 hours in a heat preservation oven; Step six: surface cleaning: the anti-peeling device is used to remove dust on the surface of the brick body; Step seven: adhesion treatment: the brick body is sandblasted by using a pneumatic sandblasting machine, and then heated to 80-120 ℃; Step eight: spraying: the anti-peeling device is used for multiple thin coating of the brick body to form an anti-peeling layer by spraying paint, so that the anti-peeling alumina hollow ball brick is prepared.

[0026] As shown in Figure 2 , the anti-peeling device comprises a workbench 1 and a box body 2, the box body 2 is connected with the workbench 1, and the box body 2 is provided with a blowing cavity 3, a cleaning cavity 4, a drying cavity 5 and a coating cavity 6.

[0027] As shown in Figure 3 , the blowing cavity 3 is connected with an air inlet cylinder 7 and a plurality of fan supports 8, the fan supports 8 are connected with the wall of the blowing cavity 3, the air inlet cylinder 7 is connected with the fan supports 8, the bottom of the blowing cavity 3 is provided with an air outlet 9, and the air outlet 9 is detachably connected with a dust collecting net 10. The air outlet 9 is provided with a fixing groove 11, the dust collecting net 10 is connected with a mounting frame 12, the mounting frame 12 is connected with a buckle 13, and the buckle 13 is clamped with the fixing groove 11.

[0028] As shown in Figure 4As shown: cleaning cavity 4 is connected with cleaning pool 14, cleaning pool 14 is connected with dip material frame 15, dip material frame 15 is connected with moving rod 16, cleaning pool 14 is connected with guide slide rail 17, moving rod 16 is movably connected with guide slide rail 17, moving rod 16 is connected with lifting rod 18.

[0029] As shown: Figure 5 As shown: drying cavity 5 is connected with support plate 19, a plurality of electric heating tube 20 are installed on the inner wall of drying cavity 5, a plurality of support vertical rods 21 are connected with the upper end of support plate 19, conveying rod 22 is connected with the lower end of support plate 19, workbench 1 is connected with transition plate 23, transition plate 23 is provided with discharge groove 24, conveying rod 22 is slidably connected with discharge groove 24.

[0030] As shown: Figure 6 , 7 As shown: coating cavity 6 is connected with material turning frame 25, spray gun frame 26 and electric heating tube 27, material turning frame 25 is rotatably connected with coating cavity 6, material turning frame 25 is elastically connected with clamping rod 28, spray gun frame 26 is located on one side of clamping rod 28, spray gun frame 26 is movably connected with coating cavity 6, spray gun frame 26 is connected with placing slot 29. Box 2 is connected with rotating mechanism 30, box 2 is provided with through hole 31, through hole 31 is inserted with rotating rod 32, rotating mechanism 30 is connected with rotating rod 32, one end of material turning frame 25 is connected with rotating rod 32. The other end of material turning frame 25 is provided with connecting cylinder 33, elastic mechanism 34 is connected in connecting cylinder 33, clamping rod 28 is inserted with connecting cylinder 33, one end of elastic mechanism 34 is connected with clamping rod 28, the other end of clamping rod 28 is connected with buffer pad 35.

[0031] As shown: Figures 1-7 As shown: rotating mechanism 30 adopts existing rotating motor equipment, through hole 31 is connected with bearing 36, rotating rod 32 is sleeved with bearing 36, so as to ensure the smoothness of rotation of rotating rod 32.

[0032] Buffer pad 35 is made of rubber material, so as to buffer the clamping force and prevent the damage of brick body.

[0033] Elastic mechanism 34 adopts spring structure.

[0034] Air inlet cylinder 7 is connected with air supply equipment (not shown in the figure) through pipeline, so that strong air flow blows and wipes the brick body to remove dust.

[0035] Dust collecting net 10 is a fine mesh screen structure, which can collect and filter dust and other impurities.

[0036] Cleaning pool 14 is built-in ultrasonic equipment (not shown in the figure), so as to enhance the initiative and efficiency of oil removal and decontamination.

[0037] Electric heating tube 20 and electric heating tube 27 are existing electric heating tube structures, which can realize heating and drying.

[0038] Clamping rod 28 is arranged relatively, so that the two sides of the brick body are stably clamped. The spray gun frame 26 is inserted into the spray gun (not shown in the figure) through the placement slot 29, the spray gun is connected with the anti-stripping layer coating supply device (not shown in the figure) through the pipeline, and the spray gun is provided with two, so that the spray gun can spray more comprehensively on the side of the brick body.

[0039] In use: 0.5~1 mm, 1~2 mm, 2~3 mm, three kinds of particle size of alumina hollow sphere, 3%~5% binder and 0.5%~1% lubricant are put into a high-speed blender for stirring and mixing, so that the brick body is mixed into a preliminary brick; the mixed material after stirring is put into a rubber mold, the mixed material is loaded into the rubber mold, and a 100~200MPa isostatic pressure is applied, so that the density of the static pressure body is uniform, the strength is high, and the anti-stripping performance is enhanced; the formed brick is dried in the natural environment for 8~11 hours; the dried brick is baked in a drying oven at 110℃~140℃ for 16~20 hours; the prepared brick body is taken out after being kept at 1600℃ for 8h.

[0040] The brick body is placed in the blowing cavity 3 of the box body 2, the air supply equipment connected with the air inlet tube 7 is started, the air flow of the air inlet tube 7 on the fan support 8 cleans the surface of the brick body, and the dust and impurities finally fall on the dust collecting net 10. The brick body is taken out from the blowing cavity 3 and sent into the dipping frame 15 in the cleaning cavity 4, the moving rod 16 is loosened, the dipping frame 15 enters the cleaning tank 14 containing anhydrous ethanol, the ultrasonic device in the cleaning tank 14 is started, the brick body is fully cleaned and decontaminated and deoiled, and then the dipping frame 15 is lifted by the lifting rod 18 to take out the brick body; the brick body is taken out and sprayed by the air pressure type sand blasting machine (not shown in the figure), so that the surface of the brick body after sand blasting is roughened and easy to adhere; the brick body is placed in the drying cavity 5, the electric heating tube one 20 is powered on, the electric heating tube one 20 dries the surface of the brick body at 80~120℃, and cracking caused by rapid dehydration is avoided; the dried brick body is taken out and placed in the coating cavity 6, the two clamping rods 28 clamp the brick body, the spray gun in the placement slot 29 of the spray gun frame 26 is started to coat the brick body, the coating (mullite powder, aluminum sol, dispersing agent and water mixed solvent) is sprayed to form an anti-stripping layer, after spraying on one side, the rotating mechanism 30 is started to horizontally flip the brick body, and then the electric heating tube two 27 is started to dry. After drying, the above operation is repeated for spraying again, and multiple thin coatings are performed. The drying operation is performed between the coatings. After the horizontal flipping and coating of the brick body, the brick body is flipped again, the surface without spraying is repeatedly operated again, the comprehensive spraying of the brick body is completed, and the anti-stripping performance of the whole brick body is enhanced.

[0041] The above examples are only used to illustrate the technical solutions of the present application, but not to limit the same; although the present application has been described in detail with reference to the foregoing examples, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing examples can be modified, or some of the technical features can be replaced by equivalent ones; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An anti-stripping alumina hollow ball brick, characterized by, Comprising The brick body is made of 0.5-1 mm, 1-2 mm, 2-3 mm three kinds of particle size alumina hollow spheres, 3%-5% binder and 0.5%-1% lubricant; The gradation ratio of the particle size alumina hollow spheres is 6:3:1, the binder is aluminum sol, and the lubricant is zinc stearate; The anti-peeling layer is coated on the surface of the brick body, and the anti-peeling layer comprises 60% mullite powder (particle size ≤5 μm) + 30% aluminum sol + 5% dispersant (such as polycarboxylate) + 5% water.

2. A process for the production of anti-stripping alumina hollow ball bricks, characterized by, Comprising the following steps: Step one: mixing: put the alumina hollow spheres, binder and lubricant into a high-speed mixer for stirring and mixing; Step two: molding: put the mixed material after stirring into a rubber mold, and put the rubber mold into a wet bag type isostatic pressing machine for molding; Step three: drying: dry the molded brick in a natural environment for 8-11 hours; Step four: drying: dry in a drying oven at 110-140℃ for 16-20 hours; Step five: Heat preservation: heat preservation at 1600℃ for 8h in a heat preservation oven; Step six: surface cleaning: remove the dust on the surface of the brick body with an anti-peeling device; Step seven: adhesion treatment: sand blasting the brick body with a pneumatic sand blasting machine, and then heat it to 80-120℃; Step eight: Spraying: use the anti-peeling device to spray the brick body with the coating to form an anti-peeling layer, and the alumina hollow sphere brick with anti-peeling performance is made.

3. The process for preparing the anti-stripping alumina hollow ball brick according to claim 2, characterized in that, The anti-peeling device comprises a workbench (1) and a box body (2), the box body (2) is connected with the workbench (1), and the box body (2) is provided with a blowing cavity (3), a cleaning cavity (4), a drying cavity (5) and a coating cavity (6) therein.

4. The process for preparing the anti-stripping alumina hollow ball brick according to claim 3, characterized in that, The blowing cavity (3) is connected with an air inlet cylinder (7) and a plurality of fan supports (8), the fan supports (8) are connected with the wall of the blowing cavity (3), the air inlet cylinder (7) is connected with the fan supports (8), the bottom of the blowing cavity (3) is provided with an air outlet (9), and the air outlet (9) is detachably connected with a dust collecting net (10).

5. The process for preparing the anti-stripping alumina hollow ball brick according to claim 4, characterized in that, The air outlet (9) is provided with a fixing groove (11), the dust collecting net (10) is connected with a mounting frame (12), the mounting frame (12) is connected with a buckle (13), and the buckle (13) is connected with the fixing groove (11).

6. The process for preparing the anti-stripping alumina hollow ball brick according to claim 3, characterized in that, The cleaning cavity (4) is connected with a cleaning pool (14), the cleaning pool (14) is connected with a material immersion frame (15), the material immersion frame (15) is connected with a moving rod (16), the cleaning pool (14) is connected with a guide slide rail (17), the moving rod (16) is movably connected with the guide slide rail (17), and the moving rod (16) is connected with a lifting rod (18).

7. The process according to claim 3, characterized in that, The drying cavity (5) is connected with a support plate (19), a plurality of electric heating tubes (20) are installed on the inner wall of the drying cavity (5), the upper end of the support plate (19) is connected with a plurality of support vertical rods (21), the lower end of the support plate (19) is connected with a conveying rod (22), the workbench (1) is connected with a transition plate (23), the transition plate (23) is provided with a discharging groove (24), and the conveying rod (22) is in sliding connection with the discharging groove (24).

8. The process for preparing the anti-stripping alumina hollow ball brick according to claim 3, characterized in that, The coating cavity (6) is connected with a material turning frame (25), a spray gun frame (26) and an electric heating tube (27), the material turning frame (25) is in rotary connection with the coating cavity (6), the material turning frame (25) is elastically connected with a material clamping rod (28), the spray gun frame (26) is arranged on one side of the material clamping rod (28), the spray gun frame (26) is in movable connection with the coating cavity (6), and the spray gun frame (26) is connected with a placing slot (29).

9. The process for preparing the anti-stripping alumina hollow ball brick according to claim 8, characterized in that, The box body (2) is connected with a rotating mechanism (30), the box body (2) is provided with a through hole (31), the through hole (31) is inserted with a rotating rod (32), the rotating mechanism (30) is connected with the rotating rod (32), and one end of the material turning frame (25) is connected with the rotating rod (32).

10. The process for preparing the anti-stripping alumina hollow ball brick according to claim 9, characterized in that, The other end of the material turning frame (25) is provided with a connecting barrel (33), the connecting barrel (33) is connected with an elastic mechanism (34) internally, the material clamping rod (28) is inserted into the connecting barrel (33), one end of the elastic mechanism (34) is connected with the material clamping rod (28), and the other end of the material clamping rod (28) is connected with a buffer pad (35).

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