CN107032819A - A kind of method that utilization white clay produces foamed ceramic fire-retardant heat-insulation material - Google Patents
A kind of method that utilization white clay produces foamed ceramic fire-retardant heat-insulation material Download PDFInfo
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- CN107032819A CN107032819A CN201710248569.3A CN201710248569A CN107032819A CN 107032819 A CN107032819 A CN 107032819A CN 201710248569 A CN201710248569 A CN 201710248569A CN 107032819 A CN107032819 A CN 107032819A
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- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/1321—Waste slurries, e.g. harbour sludge, industrial muds
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
- C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
- C04B2235/3472—Alkali metal alumino-silicates other than clay, e.g. spodumene, alkali feldspars such as albite or orthoclase, micas such as muscovite, zeolites such as natrolite
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- C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
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- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
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- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9669—Resistance against chemicals, e.g. against molten glass or molten salts
- C04B2235/9692—Acid, alkali or halogen resistance
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- 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 present invention relates to a kind of manufacture craft that foamed ceramic fire-retardant heat-insulation material is produced using high silicon tailings (abbreviation white clay), the present invention uses new technique, load after the various raw materials such as white clay, fluxing agent, flux, foaming agent are carried out dispensing, grinding, dried in fire resistant composition mould, in 1150 DEG C~1500 DEG C firings of temperature.Fire-retardant heat-insulation material is obtained after demoulding cutting.Wherein white clay addition is high, is conducive to recycling for environmental protection and resource, product is had price advantage, enhance product competitiveness.Product has the advantages that foaming aperture is uniform, proportion is low, thermal conductivity factor is low, high mechanical strength, fire protecting performance reach A grades.
Description
Technical field
The invention belongs to total utilization of PCA, it is related to energy-saving ceramic material and its manufacturing technology field, and in particular to one
Plant white clay production foamed ceramic fire-retardant heat-insulation material and its manufacture method.
Background technology
Flyash is the solid waste produced after coal or coal gangue combustion, and main composition is SiO2、Al2O3、FeO、Fe2O3、
CaO、TiO2Deng.China is the country using coal as main energy sources, and the flyash produced by national coal generated electricity in 2000 is 1.5 hundred million
Ton, more than 300,000,000 tons, a large amount of discharges of flyash cause huge pressure to the development of the national economy and ecological environment within 2010.Powder
Coal ash extracts high silicon tailings (the being referred to as white clay) silica after aluminum oxide and alumina content height, and granularity is small, there is higher
Resource reutilization is worth.
The relevant report that foamed ceramic fire-retardant heat-insulation material is produced using white clay is there are no at present.
The content of the invention
Based on above-mentioned background, it is an object of the invention to provide a kind of utilization white clay production foamed ceramic fire-retardant heat-insulation material
Method, specifically includes following steps：
1) white clay and foaming agent, fluxing agent, flux are subjected to dispensing, obtain material I；
2) by step 1) resulting material I, water and optional grinding aid be put into blowing after ball mill, grinding；
3) by step 2) in the good slurry of ball milling be dried, granulate；It is preferred that 10 mesh sieves and 20 mesh sieves are respectively adopted in granulation；
10 mesh screen residue 15%-50% and 20 mesh screen residue 20%-70% material is mixed after granulation is used for next step；
4) by step 3) in resulting material add in mould, the mould that then will be equipped with material is placed in high temperature kiln 1150
It is fired at DEG C -1500 DEG C, afterwards the cooling demoulding；
5) cutting step 4) resulting materials.
" optionally " refer to alleged by the present invention and there is a situation where comprising or do not include；Such as " optional grinding aid ", which refers to include, to be helped
Grinding agent can not include grinding aid.
Preferably, the quality of the white clay is the 10-90%, more preferably 20-90% of the material I mass.
Preferably, in the white clay silica content be by mass 18~50%, alumina content be by mass 5~
40%.
Preferably, the foaming agent includes the one or more in free carbon, iron oxide, carborundum, and use quality is institute
State the 1~4% of material I mass.
Further, the fluxing agent includes the one or more in potassium feldspar, albite, diopside, the flux bag
The one or more in fluorite, barium carbonate, glass dust are included, the use quality of the fluxing agent and flux is respectively the material I
The 4~40% of quality.
Preferably, the grinding aid includes the one or more in sodium tripolyphosphate, Sodium Polyacrylate, sodium humate, step
It is rapid 2) described in grinding aid use quality be the material I mass 0~0.25%.
Preferably, step 2) in the quality that is added water account for the 30~40% of the material I, grinding aid and water gross mass.
Preferably, step 2) in grind the material to blowing after the mesh screen residue 4-8% of fineness 325.
Preferably, step 3) described in dry temperature be 200 DEG C -300 DEG C.
Preferably, step 4) described in time for firing be 2-6h, take out the demoulding when being cooled to 150 DEG C~room temperature.
In actual processing, the initial particle size to material is not distinctly claimed, but sometimes for raising production efficiency, reduction
Energy consumption, those of ordinary skill in the art can be adjusted using the conventional method of this area to the granularity of material according to the actual requirements
It is whole.
The present invention adds other a certain amount of cheap mineral to prepare fireproof heat insulating material by this trade waste of white clay
Material.Corrosion resistance is had according to the ceramic fire-retardant heat-insulation material that the method for the invention is obtained, its good heat insulating, proportion is low,
Fire protecting performance reaches A grades, is provided simultaneously with high mechanical strength, weather-proof and acid-proof alkaline.As shown in the table, product meets standard Q/
JSKW002-2009。
| Project | Unit | Standard Q/JSKW002-2009 |
| Density | kg/m3 | ≤280 |
| Thermal conductivity factor | W/(m·K) | ≤0.8 |
| Heat storage coefficient | W/(m2·K) | ≥1.60 |
| Tensile strength | MPa | ≥0.25 |
| Combustibility | — | A1 grades |
| Water absorption rate (V/V) | % | ≤8 |
In addition, the manufacture method of the present invention with the preparation method of existing ceramic fire-retardant heat-insulation material compared with following excellent
Point：
1) technique is simple, and material is easy to get, and cost is low
Ceramic fire-retardant heat-insulation material is produced using white clay, belongs to the comprehensive utilization of resource, recycle, fine coal can be reduced
Destruction of the ash to environment；Meet the policy guidance of country, be the method for the total utilization of PCA industrialization of a great prospect.
The present invention need not be activated to white clay, and the physical property and granularity to white clay are not specially required, and simply require it
Chemical composition is stable.White clay use ratio is high, reaches as high as 90%.
The used heat produced in present invention process flow in product sintering procedure can be used for dry materials and winter heating etc.
Purposes, can be used effectively；And whole technical process does not discharge any waste water, waste liquid, waste residue and pernicious gas, is environment-friendly
The type mode of production, adequately achieves environmental protection demand.
2) product manufacturing specification is easily adjusted
By controlling mould specification during formed product, the shape, size and thickness of finished product can be adjusted, so as to obtain not
The fire-retardant heat-insulation material product of same specification, the need for being adapted to different purposes.
3) excellent product performance
Fire-retardant heat-insulation material fire protecting performance produced by the invention reaches A grades, and foaming aperture is uniform and attractive in appearance, thermal conductivity factor
Low, proportion is low, water absorption rate is low, high mechanical strength, good heat insulating.
Brief description of the drawings
Fig. 1 is the process chart that foamed ceramic fire-retardant heat-insulation material method is produced using white clay.
Fig. 2 is that the section of the refractory ceramic material produced using the inventive method is illustrated.
Embodiment
Main experimental device inventory
Main raw material(s) is detailed
| Sequence number | Material name | Source | Specification |
| 1 | White clay | Zhun Neng resource synthetic developments Co., Ltd of Shenhua | |
| 2 | Potassium feldspar | The Li Yuan mining companies of Shaanxi three | 40 mesh |
| 3 | Glass dust | Baoji Qin Lei mineral powder plants | 10 mesh |
| 4 | Carborundum | Xi'an Long Jigui industry company | 80 mesh |
| 5 | Sodium tripolyphosphate | Tianjin chemical reagent factory | SILVER REAGENT |
Embodiment 1：
1) take the white clay 500kg containing 22% aluminum oxide, 50% silica, add 25kg carborundum, 120kg potassium feldspars and
355kg glass dust；
2) above-mentioned material is put into ball mill, adds 2.5kg sodium tripolyphosphates and 500kg water is ground, be ground to thin
Spend blowing after 325 mesh screen residues 5%；
3) ground slurry Electric heat oven is dried at 255 DEG C；Dried material is granulated with comminutor,
Mix resulting material under the conditions of 10 mesh screen residues 40% and 20 mesh screen residues 60%.
4) material after granulation is put into feed bin, added from feed bin into 300mm × 300mm × 60mm fire resistant composition mould
Material；The mould for adding material is put into high temperature kiln, 4h is fired under 1250 DEG C of high temperature；By the product cooling baked to 50 DEG C
Take out, be stripped out of kiln afterwards；
5) product after being stripped obtains meeting the fire-retardant heat-insulation material finished product of national standard after cutting is arranged.
Embodiment 2：
1) take the white clay 600kg containing 18% aluminum oxide, 48% silica, add 30kg carborundum, 150kg potassium feldspars and
220kg glass dust；
2) above-mentioned material is put into ball mill, adds 2.5kg sodium tripolyphosphates and 660kg water, be ground, be ground to thin
Spend blowing after 325 mesh screen residues 7.2%；
3) ground slurry Electric heat oven is dried at 255 DEG C；Dried material is granulated with comminutor,
Mix resulting material under the conditions of 10 mesh screen residues 40% and 20 mesh screen residues 60%；
4) material after granulation is put into feed bin；Added from feed bin into 400mm × 400mm × 50mm fire resistant composition mould
Material；The mould for adding material is put into high temperature kiln, fired 3 hours under 1300 DEG C of high temperature；By the product cooling baked extremely
Take out, be stripped out of kiln after 80 DEG C；
5) product after being stripped obtains meeting the fire-retardant heat-insulation material finished product of national standard after cutting is arranged.
Embodiment 3：
1) take the white clay 700kg containing 25% aluminum oxide and 45% silica, add 25kg carborundum, 80kg potassium feldspars and
195kg glass dust；
2) above-mentioned material is put into ball mill, adds 2.5kg sodium tripolyphosphates and 600kg water is ground；It is ground to thin
Spend blowing after 325 mesh screen residues 6%；
3) ground slurry Electric heat oven is dried at 255 DEG C；Dried material is granulated with comminutor,
Mix resulting material under the conditions of 10 mesh screen residues 40% and 20 mesh screen residues 60%；
4) material after granulation is put into feed bin；Added from feed bin into 500mm × 400mm × 60mm fire resistant composition mould
Material；The mould for adding material is put into high temperature kiln, fired 3.5 hours under 1350 DEG C of high temperature；By the product cooling baked
Take out, be stripped out of kiln after to 65 DEG C；
5) product after being stripped obtains meeting the fire-retardant heat-insulation material finished product of national standard after cutting is arranged.
The performance test of embodiment 4 and result：
| Project | Unit | Test method |
| Dry density | Kg/m3 | GB/T5486 |
| Thermal conductivity factor | W/(mk) | GB/T10294 |
| Tensile strength | MPa | GB/T9641 |
| Water absorption rate | % | GB/T5486 |
| Combustibility | -- | GB8624 |
The properties of product of embodiment 1：
| Project | Unit | Standard | Survey index |
| Dry density | Kg/m3 | 280 | 280 |
| Thermal conductivity factor | W/(mk) | ≤0.10 | 0.09 |
| Tensile strength | MPa | ≥0.20 | 0.51 |
| Water absorption rate | % | ≤8 | 6.4 |
| Combustibility | -- | A grades | A |
The properties of product of example 2：
| Project | Unit | Standard | Survey index |
| Dry density | Kg/m3 | 280 | 272 |
| Thermal conductivity factor | W/(mk) | ≤0.10 | 0.085 |
| Tensile strength | MPa | ≥0.20 | 0.39 |
| Water absorption rate | % | ≤8 | 5.4 |
| Combustibility | -- | A grades | A |
The properties of product of example 3：
| Project | Unit | Standard | Survey index |
| Dry density | Kg/m3 | 280 | 270 |
| Thermal conductivity factor | W/(mk) | ≤0.10 | 0.08 |
| Tensile strength | MPa | ≥0.20 | 0.29 |
| Water absorption rate | % | ≤8 | 6.0 |
| Combustibility | -- | A grades | A |
Claims (10)
1. a kind of method that utilization white clay produces foamed ceramic fire-retardant heat-insulation material, comprises the following steps：
1) white clay and foaming agent, fluxing agent, flux are subjected to dispensing, obtain material I；
2) by step 1) resulting material I, water and optional grinding aid be put into blowing after ball mill, grinding；
3) by step 2) in the good slurry of ball milling be dried, granulate；It is preferred that 10 mesh sieves and 20 mesh sieves are respectively adopted in granulation；Granulation
Mixing 10 mesh screen residue 15%-50% and 20 mesh screen residue 20%-70% material afterwards is used for next step；
4) by step 3) in resulting material add in mould, then will be equipped with material mould be placed in high temperature kiln 1150 DEG C-
It is fired at 1500 DEG C, afterwards the cooling demoulding；
5) cutting step 4) resulting materials.
2. according to the method described in claim 1, it is characterised in that the quality of the white clay is the 10- of the material I mass
90%, preferably 20-90%.
3. method according to claim 1 or 2, it is characterised in that in the white clay silica content be by mass 18~
50%, alumina content is by mass 5~40%.
4. the method according to any one of foregoing claim, it is characterised in that institute's foaming agent includes free carbon, iron oxide, carbon
One or more in SiClx, use quality is the 1~4% of the material I mass.
5. the method according to any one of foregoing claim, it is characterised in that the fluxing agent include potassium feldspar, albite,
One or more in diopside, the flux includes the one or more in fluorite, barium carbonate, glass dust, the fluxing agent
Use quality with flux is respectively the 4~40% of the material I mass.
6. the method according to any one of foregoing claim, it is characterised in that the grinding aid includes sodium tripolyphosphate, gathered
One or more in PAA, sodium humate, step 2) described in grinding aid use quality for the material I mass
0~0.25%.
7. the method according to any one of preceding claims, it is characterised in that step 2) in the quality that is added water account for the thing
Expect the 30~40% of I, grinding aid and water gross mass.
8. the method according to any one of preceding claims, it is characterised in that step 2) in grind the material to fineness 325
Blowing after mesh screen residue 4-8%.
9. the method according to any one of preceding claims, it is characterised in that step 3) described in the temperature dried be 200
℃-300℃。
10. the method according to any one of preceding claims, it is characterised in that step 4) described in time for firing be 2-
6h, the demoulding is taken out when being cooled to 150 DEG C~room temperature.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710248569.3A CN107032819A (en) | 2017-04-17 | 2017-04-17 | A kind of method that utilization white clay produces foamed ceramic fire-retardant heat-insulation material |
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| CN201710248569.3A CN107032819A (en) | 2017-04-17 | 2017-04-17 | A kind of method that utilization white clay produces foamed ceramic fire-retardant heat-insulation material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110194655A (en) * | 2019-04-27 | 2019-09-03 | 招远市招金金合科技有限公司 | A method of building porcelain granule is prepared using high silicon tailings |
| CN112110714A (en) * | 2020-09-18 | 2020-12-22 | 神华准能资源综合开发有限公司 | Preparation method and application of acid-resistant brick material |
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| CN103214230A (en) * | 2013-05-22 | 2013-07-24 | 航天推进技术研究院 | Thermal insulation fireproof material prepared from fly ash and preparation method of material |
| CN103803943A (en) * | 2013-12-13 | 2014-05-21 | 中国神华能源股份有限公司 | Foaming ceramic insulation board and preparation method thereof |
| CN103833406A (en) * | 2013-12-13 | 2014-06-04 | 中国神华能源股份有限公司 | Foam ceramic warming plate, and preparation method thereof |
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2017
- 2017-04-17 CN CN201710248569.3A patent/CN107032819A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103214230A (en) * | 2013-05-22 | 2013-07-24 | 航天推进技术研究院 | Thermal insulation fireproof material prepared from fly ash and preparation method of material |
| CN103803943A (en) * | 2013-12-13 | 2014-05-21 | 中国神华能源股份有限公司 | Foaming ceramic insulation board and preparation method thereof |
| CN103833406A (en) * | 2013-12-13 | 2014-06-04 | 中国神华能源股份有限公司 | Foam ceramic warming plate, and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110194655A (en) * | 2019-04-27 | 2019-09-03 | 招远市招金金合科技有限公司 | A method of building porcelain granule is prepared using high silicon tailings |
| CN112110714A (en) * | 2020-09-18 | 2020-12-22 | 神华准能资源综合开发有限公司 | Preparation method and application of acid-resistant brick material |
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