CN112759413A - Foamed ceramic prepared by using polishing slurry as base material and preparation method thereof - Google Patents
Foamed ceramic prepared by using polishing slurry as base material and preparation method thereof Download PDFInfo
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- CN112759413A CN112759413A CN202011563199.0A CN202011563199A CN112759413A CN 112759413 A CN112759413 A CN 112759413A CN 202011563199 A CN202011563199 A CN 202011563199A CN 112759413 A CN112759413 A CN 112759413A
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- foamed ceramic
- parts
- polishing slurry
- blank
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- 239000000919 ceramic Substances 0.000 title claims abstract description 72
- 238000005498 polishing Methods 0.000 title claims abstract description 32
- 239000000463 material Substances 0.000 title claims abstract description 15
- 239000002002 slurry Substances 0.000 title claims description 32
- 238000002360 preparation method Methods 0.000 title claims description 11
- 238000000034 method Methods 0.000 claims abstract description 24
- 239000010451 perlite Substances 0.000 claims abstract description 20
- 235000019362 perlite Nutrition 0.000 claims abstract description 20
- 239000006260 foam Substances 0.000 claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 16
- 239000003381 stabilizer Substances 0.000 claims abstract description 16
- 239000007767 bonding agent Substances 0.000 claims abstract description 15
- 238000005187 foaming Methods 0.000 claims abstract description 14
- 238000005245 sintering Methods 0.000 claims abstract description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000002994 raw material Substances 0.000 claims description 22
- 238000001035 drying Methods 0.000 claims description 15
- 239000011230 binding agent Substances 0.000 claims description 14
- 239000004088 foaming agent Substances 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 14
- 238000010304 firing Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000001238 wet grinding Methods 0.000 claims description 12
- 239000005995 Aluminium silicate Substances 0.000 claims description 11
- 235000012211 aluminium silicate Nutrition 0.000 claims description 11
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 239000012744 reinforcing agent Substances 0.000 claims description 7
- 238000005469 granulation Methods 0.000 claims description 6
- 230000003179 granulation Effects 0.000 claims description 6
- 238000003754 machining Methods 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- DLHONNLASJQAHX-UHFFFAOYSA-N aluminum;potassium;oxygen(2-);silicon(4+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Si+4].[Si+4].[Si+4].[K+] DLHONNLASJQAHX-UHFFFAOYSA-N 0.000 claims description 5
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 5
- 239000002904 solvent Substances 0.000 claims description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 4
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 claims description 4
- 239000000395 magnesium oxide Substances 0.000 claims description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 4
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 4
- 238000000498 ball milling Methods 0.000 claims description 3
- 229910001570 bauxite Inorganic materials 0.000 claims description 3
- 239000004927 clay Substances 0.000 claims description 3
- 229910052593 corundum Inorganic materials 0.000 claims description 3
- 239000010431 corundum Substances 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000007688 edging Methods 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 229910021532 Calcite Inorganic materials 0.000 claims description 2
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 2
- 229910052656 albite Inorganic materials 0.000 claims description 2
- 229910021418 black silicon Inorganic materials 0.000 claims description 2
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 2
- 239000010433 feldspar Substances 0.000 claims description 2
- 239000010436 fluorite Substances 0.000 claims description 2
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 2
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 2
- 229910052629 lepidolite Inorganic materials 0.000 claims description 2
- 229940072033 potash Drugs 0.000 claims description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 2
- 235000015320 potassium carbonate Nutrition 0.000 claims description 2
- 239000000454 talc Substances 0.000 claims description 2
- 229910052623 talc Inorganic materials 0.000 claims description 2
- 239000011787 zinc oxide Substances 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 10
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000000137 annealing Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 239000010438 granite Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
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- C04B33/02—Preparing or treating the raw materials individually or as batches
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- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Abstract
The foamed ceramic is prepared by stacking and sintering a plurality of sheets, the base materials of the sheets are polishing mud, a foam stabilizer containing aluminum oxide and expanded perlite micro powder, and a sheet bonding agent is arranged among the sheets and comprises perlite powder. According to the method, a plurality of sheets are mutually overlapped through a blank bonding agent to form a blank which is fed into a kiln to be fired, the blank bonding agent promotes the mutual reaction of the sheets when the blank bonding agent is at a high temperature, the plurality of sheets form an integral structure, and the foam stabilizer is utilized to enable the foamed ceramic to uniformly expand and keep a certain shape in the foaming process, so that the foamed ceramic blank is prevented from generating huge deformation and collapsing in the foaming process, and the requirement of high-temperature foaming of the foamed ceramic under a frame strip-free piece is met.
Description
Technical Field
The application relates to a foamed ceramic prepared by using polishing slurry as a base material and a preparation method thereof.
Background
The foamed ceramic is generally prepared by taking solid wastes such as perlite tailings, polished porcelain slag, gold tailings, granite sawn mud and the like as main raw materials, introducing a proper amount of inorganic matters and adopting an advanced production process to foam at high temperature. The foamed ceramic has the functions of heat preservation, heat insulation, sound insulation, noise reduction, water resistance and moisture resistance at normal temperature due to the structural characteristics of closed holes.
The prior art for producing foamed ceramics in China generally fills granulated powder of the foamed ceramics in a mold frame which is formed by taking refractory materials such as cordierite-mullite or silicon carbide and the like as a bottom plate and a baffle plate, the granulated powder is isolated from the mold frame by alumina silicate refractory fiber paper, the mold frame carries the granulated powder to be put into a kiln to be fired together, the used mold frame kiln has high specific gravity and heavy weight, a large amount of heat is absorbed in the firing process, the proportion accounts for more than half of the total consumed heat, and natural gas at the firing section of the foamed ceramics in the unit of the traditional process is about 100-110 m-3And the energy consumption is huge, so that the production cost is high.
Disclosure of Invention
In order to solve the problem, the application provides an utilize foamed ceramic of polishing mud preparation as the base material, foamed ceramic is formed by a plurality of thin slice stack fever, the base material of thin slice is polishing mud, the foam stabilizer and the expanded perlite miropowder that contain aluminium oxide, is provided with the thin slice binder between each thin slice, the thin slice binder includes the perlite powder. According to the method, a plurality of sheets are mutually overlapped through a blank bonding agent to form a blank which is fed into a kiln to be fired, the blank bonding agent promotes the mutual reaction of the sheets when the blank bonding agent is at a high temperature, the plurality of sheets form an integral structure, and the foam stabilizer is utilized to enable the foamed ceramic to uniformly expand and keep a certain shape in the foaming process, so that the foamed ceramic blank is prevented from generating huge deformation and collapsing in the foaming process, and the requirement of high-temperature foaming of the foamed ceramic under a frame strip-free piece is met. The polishing slurry of the present application refers to a ceramic polishing slurry.
Preferably, the raw materials of the flake comprise the following substances in parts by mass: polishing slurry: 30-50 parts; expanded perlite micropowder: 10-25 parts; foam stabilizer: 10-20 parts; fluxing agent: 5-20 parts of a solvent; foaming agent: 0.2-1 part, green body reinforcing agent: 0.01-0.1 portion.
Preferably, the raw materials of the flake binding agent comprise the following substances in parts by mass: perlite powder: 40-80 parts; potassium feldspar: 5-15 parts; kaolin: 5-15 parts; foaming agent: 0.1-1 part.
Preferably, the foam stabilizer is one or more of star kaolin, flint clay and bauxite in any proportion. An important function of the foam stabilizer is to provide alumina, improve the viscosity of the high-temperature melt of the foamed ceramic, and enable the foamed ceramic to expand uniformly and keep a certain shape.
Preferably, the fluxing agent is one or more of potash feldspar, albite, talc, calcite, fluorite, lepidolite, zinc oxide, magnesium oxide, iron oxide and manganese oxide in any proportion, and the fluxing agent contains magnesium oxide.
Preferably, the foaming agent is one or two of black silicon carbide and green silicon carbide in any proportion, and the granularity of the foaming agent is not less than 1000 meshes.
Preferably, the blank reinforcing agent is one or more of CMA, HPMC and PVA in any proportion.
On the other hand, the preparation method of the foamed ceramic prepared by using the polishing slurry as the base material is also disclosed, and comprises the following steps:
s1, material preparation: the foamed ceramic raw material comprises the following raw materials in parts by weight: polishing slurry: 30-50 parts; expanded perlite micropowder: 10-25 parts; foam stabilizer: 10-20 parts; fluxing agent: 5-20 parts of a solvent; foaming agent: 0.2-1 part, green body reinforcing agent: 0.01-0.1 part; the green body bonding agent is prepared from the following raw materials in parts by weight: perlite powder: 40-80 parts; potassium feldspar: 5-15 parts; kaolin: 5-15 parts; foaming agent: 0.1-1 part;
s2, wet grinding of a ball mill: the raw materials are as follows by mass ratio: ball: water 1: 2: 0.6, respectively putting the foamed ceramic and the green body binder raw materials into a ball milling tank, and wet milling the mixture by a ball mill, wherein the fineness is controlled to ensure that the residue of a ten thousand-hole sieve is not more than 5.0 wt%;
s3, granulation: carrying out spray granulation on the mixture obtained after wet grinding of the foamed ceramics, controlling the particle size to be 40-80 meshes and not less than 80 wt%, and drying to obtain the mixture with the water content of not more than 7 wt%; slurry obtained after wet grinding of the green body binding agent enters a slurry tank for later use;
s4, dry pressing and forming: conveying the foamed ceramic mixture to a press by a belt conveyor and a bucket elevator, and pressing into sheets of 15-25mm by a dry pressing method;
s5, drying the blank: drying the slices in a drying roller kiln for 80-240min at a drying temperature not higher than 220 ℃ until the water content of the dried slices is not higher than 0.5 wt%;
s6, blank body superposition: spraying a layer of green body binding agent on the upper surfaces of the dried sheets, and mutually overlapping a plurality of sheets to form a green body;
s7, firing: coating a refractory coating on the bottom of the obtained blank, feeding the blank into a roller kiln, and carrying out die-free naked firing and high-temperature foaming firing to obtain a foamed ceramic blank;
s8, cold machining: the method comprises the steps of cutting, edging, chamfering, slotting and the like, and the products after cold machining are subjected to color separation, grading, packaging and transferring into a warehouse. The compressive strength of the foamed ceramic obtained by the method is more than 5MPa, and the volume weight is 300-500 kg/m3The water absorption rate is less than 1%, the fire endurance is more than 1h, the heat conductivity coefficient is 0.1-0.14 w/(m.k), and the natural gas consumption per cubic product in a sintering section is 40-60 Nm3。
Preferably, the thickness of the green body binder is: 0.1-0.5 mm.
Preferably, the thickness of the foamed ceramic blank is: 80-150 mm;
the refractory coating is composed of one or more than two of alumina, corundum and kaolin in any proportion.
This application can bring following beneficial effect: in the prior art, the sintered foamed ceramic is generally obtained by arranging powder with a certain thickness in a die frame made of refractory materials, and the die frame absorbs a large amount of heat and influences the heat dissipation effect of the foamed ceramic during annealing, thereby influencing the annealing speed. The specific gravity of the green body is reduced through the expanded perlite micro powder, so that the foaming expansion rate of the foamed ceramic green body is reduced, the foamed ceramic is uniformly expanded in the foaming process and keeps a certain shape by combining the foam stabilizer, the foamed ceramic green body is prevented from being greatly deformed and collapsed in the foaming process, and the requirement of high-temperature foaming of the foamed ceramic under the condition of no mold frame strip is met; a plurality of sheets are mutually overlapped to form a blank body which is fed into a kiln to be fired by introducing a blank body bonding agent with similar chemical components, the sheets are promoted to mutually react at high temperature by the blank body bonding agent, and the plurality of sheets form an integral structure, are firmly bonded and have no chemical defects. The star kaolin or flint clay or bauxite is used as a formula to provide aluminum oxide as a foam stabilizer, so that the viscosity and the surface tension of the high-temperature melt of the foamed ceramic are improved, and the foamed ceramic uniformly expands in the foaming process and keeps the shape of a blank. The invention reduces the heat absorption of kiln furniture, shortens the annealing time of the foamed ceramic, reduces the energy consumption of the firing section of the foamed ceramic to about 60 percent of that of the traditional process, and ensures that each property of the foamed ceramic meets the use requirement, thereby improving the economic benefit of producing the foamed ceramic product by taking the polishing mud as the main raw material.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the present application will be explained in detail through the following embodiments.
The present application itself comprises a formulation, a preparation method, but since the production method is based on the formulation, the following elucidation of the present application is made from the viewpoint of the preparation method, and the synthesis of the foamed ceramic of the present application comprises the following steps:
s1, material preparation: the foamed ceramic raw material comprises the following raw materials in parts by weight: polishing slurry: 30-50 parts; expanded perlite micropowder: 10-25 parts; foam stabilizer: 10-20 parts; fluxing agent: 5-20 parts of a solvent; foaming agent: 0.2-1 part, green body reinforcing agent: 0.01-0.1 part; the green body bonding agent is prepared from the following raw materials in parts by weight: perlite powder: 40-80 parts; potassium feldspar: 5-15 parts; kaolin: 5-15 parts; foaming agent: 0.1-1 part;
s2, wet grinding of a ball mill: the raw materials are as follows by mass ratio: ball: water 1: 2: 0.6, respectively putting the foamed ceramic and the green body binder raw materials into a ball milling tank, and wet milling the mixture by a ball mill, wherein the fineness is controlled to ensure that the residue of a ten thousand-hole sieve is not more than 5.0 wt%;
s3, granulation: carrying out spray granulation on the mixture obtained after wet grinding of the foamed ceramics, controlling the particle size to be 40-80 meshes and not less than 80 wt%, and drying to obtain the mixture with the water content of not more than 7 wt%; slurry obtained after wet grinding of the green body binding agent enters a slurry tank for later use;
s4, dry pressing and forming: conveying the foamed ceramic mixture to a press by a belt conveyor and a bucket elevator, and pressing into sheets of 15-25mm by a dry pressing method; the specific components are shown in table 1:
table 1:
s5, drying the blank: drying the slices in a drying roller kiln for 80-240min at a drying temperature not higher than 220 ℃ until the water content of the dried slices is not higher than 0.5 wt%;
s6, blank body superposition: and spraying a layer of green body bonding agent on the upper surface of the dried sheet, wherein the thickness of the green body bonding agent is as follows: 0.1-0.5mm, and mutually overlapping a plurality of sheets to form a blank;
s7, firing: and (2) feeding the bottom of the obtained blank body into a roller kiln, wherein the refractory coating is composed of one or more than two of alumina, corundum and kaolin in any proportion, and a foamed ceramic blank is obtained by adopting mould-free naked firing high-temperature foaming firing, and the thickness of the foamed ceramic blank is as follows: 80-150 mm;
s8, cold machining: the method comprises the steps of cutting, edging, chamfering, slotting and the like, and the products after cold machining are subjected to color separation, grading, packaging and transferring into a warehouse. The compressive strength of the foamed ceramic obtained by the method is more than 5MPa, the volume weight is 300-500 kg/m3, the water absorption is less than 1%, the fire resistance limit is more than 1h, the heat conductivity coefficient is 0.1-0.14 w/(m.k), and the natural gas consumption of each cubic product in a sintering section is 40-60 Nm3。
And S9, performing product characterization on the obtained material, wherein specific parameters and measurement data are shown in a table 2.
Table 2:
note that: the compressive strength in Table 2 is equal to or greater than a value, which indicates that the measured value is between the value and the value + 1.
Therefore, the foamed ceramic prepared by using the polishing mud as the main raw material by adopting the method has low volume weight and high strength, meets the use requirement of the partition board, has use value, avoids heat absorption of kiln furniture and can obviously reduce the energy consumption of products.
Particularly, the selection of the foam stabilizer, the selection of the fluxing agent, the addition mode of the expanded perlite micro powder and whether the perlite is subjected to modification treatment or not have important influence on the formation or not of the final foamed ceramic, the material property and the like.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A foamed ceramic prepared by using polishing slurry as a base material is characterized in that: the foamed ceramic is formed by stacking and sintering a plurality of sheets, the base materials of the sheets are polishing mud, a foam stabilizer containing aluminum oxide and expanded perlite micro powder, and sheet bonding agents are arranged among the sheets and comprise perlite powder.
2. The foamed ceramic according to claim 1, wherein the foamed ceramic is prepared from a polishing slurry, and the polishing slurry comprises: the raw materials of the slice comprise the following substances in parts by mass: polishing slurry: 30-50 parts; expanded perlite micropowder: 10-25 parts; foam stabilizer: 10-20 parts; fluxing agent: 5-20 parts of a solvent; foaming agent: 0.2-1 part, green body reinforcing agent: 0.01-0.1 portion.
3. The foamed ceramic according to claim 1, wherein the foamed ceramic is prepared from a polishing slurry, and the polishing slurry comprises: the raw materials of the flake binding agent comprise the following substances in parts by mass: perlite powder: 40-80 parts; potassium feldspar: 5-15 parts; kaolin: 5-15 parts; foaming agent: 0.1-1 part.
4. The foamed ceramic according to claim 1, wherein the foamed ceramic is prepared from a polishing slurry, and the polishing slurry comprises: the foam stabilizer is one or more than two of star kaolin, flint clay or bauxite in any proportion.
5. The foamed ceramic according to claim 1, wherein the foamed ceramic is prepared from a polishing slurry, and the polishing slurry comprises: the fluxing agent is one or more than two of potash feldspar, albite, talc, calcite, fluorite, lepidolite, zinc oxide, magnesium oxide, iron oxide and manganese oxide in any proportion, and the fluxing agent contains magnesium oxide.
6. The foamed ceramic according to claim 1, wherein the foamed ceramic is prepared from a polishing slurry, and the polishing slurry comprises: the foaming agent is one or two of black silicon carbide and green silicon carbide in any proportion, and the granularity of the foaming agent is not less than 1000 meshes.
7. The foamed ceramic according to claim 1, wherein the foamed ceramic is prepared from a polishing slurry, and the polishing slurry comprises: the blank reinforcing agent is one or more than two of CMA, HPMC and PVA in any proportion.
8. A preparation method of foamed ceramic prepared by using polishing slurry as a base material is characterized by comprising the following steps: the method comprises the following steps:
s1, material preparation: the foamed ceramic raw material comprises the following raw materials in parts by weight: polishing slurry: 30-50 parts; expanded perlite micropowder: 10-25 parts; foam stabilizer: 10-20 parts; fluxing agent: 5-20 parts of a solvent; foaming agent: 0.2-1 part, green body reinforcing agent: 0.01-0.1 part; the green body bonding agent is prepared from the following raw materials in parts by weight: perlite powder: 40-80 parts; potassium feldspar: 5-15 parts; kaolin: 5-15 parts; foaming agent: 0.1-1 part;
s2, wet grinding of a ball mill: the raw materials are as follows by mass ratio: ball: water 1: 2: 0.6, respectively putting the foamed ceramic and the green body binder raw materials into a ball milling tank, and wet milling the mixture by a ball mill, wherein the fineness is controlled to ensure that the residue of a ten thousand-hole sieve is not more than 5.0 wt%;
s3, granulation: carrying out spray granulation on the mixture obtained after wet grinding of the foamed ceramics, controlling the particle size to be 40-80 meshes and not less than 80 wt%, and drying to obtain the mixture with the water content of not more than 7 wt%; slurry obtained after wet grinding of the green body binding agent enters a slurry tank for later use;
s4, dry pressing and forming: conveying the foamed ceramic mixture to a press by a belt conveyor and a bucket elevator, and pressing into sheets of 15-25mm by a dry pressing method;
s5, drying the blank: drying the slices in a drying roller kiln for 80-240min at a drying temperature not higher than 220 ℃ until the water content of the dried slices is not higher than 0.5 wt%;
s6, blank body superposition: spraying a layer of green body binding agent on the upper surfaces of the dried sheets, and mutually overlapping a plurality of sheets to form a green body;
s7, firing: coating a refractory coating on the bottom of the obtained blank, feeding the blank into a roller kiln, and carrying out die-free naked firing and high-temperature foaming firing to obtain a foamed ceramic blank;
s8, cold machining: the method comprises the steps of cutting, edging, chamfering, slotting and the like, and the products after cold machining are subjected to color separation, grading, packaging and transferring into a warehouse.
9. The method for preparing a foamed ceramic using a polishing slurry as a base according to claim 8, wherein: the thickness of the green body binder is as follows: 0.1-0.5 mm.
10. The method of claim 9, wherein the method comprises the steps of: the thickness of the foamed ceramic blank is as follows: 80-150 mm;
the refractory coating is composed of one or more than two of alumina, corundum and kaolin in any proportion.
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