CN104774023A - Lightweight ceramisite prepared from coal ashes and gasification slag as well as preparation method and application thereof - Google Patents
Lightweight ceramisite prepared from coal ashes and gasification slag as well as preparation method and application thereof Download PDFInfo
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- 239000002893 slag Substances 0.000 title claims abstract description 115
- 238000002309 gasification Methods 0.000 title claims abstract description 114
- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- 239000010883 coal ash Substances 0.000 title abstract description 20
- 239000002994 raw material Substances 0.000 claims abstract description 81
- 239000000463 material Substances 0.000 claims abstract description 45
- 229910052656 albite Inorganic materials 0.000 claims abstract description 33
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 27
- 239000002245 particle Substances 0.000 claims abstract description 17
- 239000004566 building material Substances 0.000 claims abstract description 8
- 239000000919 ceramic Substances 0.000 claims description 106
- 239000010881 fly ash Substances 0.000 claims description 92
- 238000000034 method Methods 0.000 claims description 51
- 238000007493 shaping process Methods 0.000 claims description 38
- 238000001035 drying Methods 0.000 claims description 37
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 36
- 238000009413 insulation Methods 0.000 claims description 36
- 229910052700 potassium Inorganic materials 0.000 claims description 36
- 239000011591 potassium Substances 0.000 claims description 36
- 238000002156 mixing Methods 0.000 claims description 35
- 239000004576 sand Substances 0.000 claims description 34
- 238000010304 firing Methods 0.000 claims description 27
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 26
- 239000008188 pellet Substances 0.000 claims description 24
- 238000011068 loading method Methods 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 14
- 239000002002 slurry Substances 0.000 claims description 13
- 239000011248 coating agent Substances 0.000 claims description 12
- 238000000576 coating method Methods 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 5
- 238000009826 distribution Methods 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000005245 sintering Methods 0.000 abstract description 4
- 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 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- 238000004519 manufacturing process Methods 0.000 description 11
- 238000000498 ball milling Methods 0.000 description 10
- 239000002910 solid waste Substances 0.000 description 10
- 239000012752 auxiliary agent Substances 0.000 description 9
- 238000002203 pretreatment Methods 0.000 description 9
- 238000005303 weighing Methods 0.000 description 9
- 239000003245 coal Substances 0.000 description 8
- 238000011056 performance test Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 238000004064 recycling Methods 0.000 description 5
- 239000010802 sludge Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000003818 cinder Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000004043 dyeing Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000010813 municipal solid waste Substances 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 2
- 229910052683 pyrite Inorganic materials 0.000 description 2
- 239000011028 pyrite Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241000282376 Panthera tigris Species 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000000643 oven drying Methods 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention relates to the technical field of building materials, and in particular relates to lightweight ceramisite prepared from coal ashes and gasification slag as well as a preparation method and an application thereof. The lightweight ceramisite is prepared from the following raw materials with the following components in parts by weight: 100 parts of base materials comprising 40-90 parts of coal ashes, 10-30 parts of gasification slag, 0-20 parts of potassium feldspar and 0-20 parts of albite; and 0-4 parts of additional auxiliaries which are selected from one or two of semicoke or silicon carbide, wherein the coal ashes account for 40-90%, and the gasification slag particles account for 10-30%; and the sintering temperature is 1120-1200 DEG C, the energy consumption is reduced, the raw material distribution is relatively wide and the raw materials are easily available. The lightweight ceramisite has bulk density lower than or equal to 700 kg/m<3>, is smaller in weight, higher in strength, wider in raw material distribution and easier to obtain, and the barrel pressure strength can be higher than 10 MPa.
Description
Technical field
The present invention relates to building material technical field, relate generally to the light ceramic that a kind of density is low, intensity is high, smooth surface, water-intake rate are low, be specifically related to a kind ofly utilize flyash and the gasification light ceramic prepared of slag and method for making thereof and application.
Background technology
Flyash is a kind of solid waste produced in coal-burning power plant's production process, and output accounts for 5 ~ 20% of coal-fired total amount.China's flyash annual emissions about 500,000,000 tons, high-volume more than 2,000,000,000 tons, current China flyash heap, stores up grey field land occupation about 4 × 10
4km
2, this is serious environment pollution not only, also occupies a large amount of land resources.Containing a large amount of sieve and silica-sesquioxides in flyash, if the main component in flyash is used, just " can turns waste into wealth ", reach the object of protection of the environment.The technology application such as haydite, fracturing propping agents, building materials, domestic ceramics prepared by existing adulterated flour coal ash at present, but flyash consumption is not very large.
Gasification slag is a kind of solid waste produced in coal gasifying process, and its carbon content is higher, and shatter value is good, and has certain calorific value, and the patent documentation quantity at present about gasification slag recycling is very limited, and all concentrates on secondary combustion field.(the Chinese patent such as Fan Jiafeng, CN201210511610.9, the treatment process of a kind of Coal Chemical Industry gasification slag) disclose the treatment process of a kind of Coal Chemical Industry gasification slag, clay wash is added again by after gasification slag and coal slime Homogeneous phase mixing, afterwards mixture is transported in fluidized-bed combustion boiler, is realized the comprehensive utilization of gasification slag by fluidized-bed combustion boiler combustion technology.Height continues (the energy-conservation and environmental protection such as light, 02 phase in 2014, coal water slurry gasification ash comprehensive utilization and performance analysis) report the gasification characteristic of slag and treatment process, and carried out performance analysis by coal slime pipeline to boiler conveying burning to after gasification slag and coal slime mixing.
Haydite principal feature is that unit weight is light, intensity is high, thermal conductivity is low, refractoriness is high, chemical stability is good, thus than natural rock, there is more superior physical and mechanical property, this makes haydite be applied in building materials gradually, not only reduce building materials weight, make again building materials have enough intensity, and there is insulation and soundproof effect.Main preparation technology is as shown in Figure 1: by the various material component of formula precise of design, carries out the haydite preparation sections such as batching mixes, shaping, dry, roasting, cooling afterwards, finally obtains haydite sample.Some formula and preparation methods are disclosed in patent documentation in recent years.
(the Chinese patent such as Huang Jianfeng, CN200910023179.1, utilize coal ash for manufacturing for the method for haydite) disclose a kind of coal ash for manufacturing that utilizes for a method for haydite, its flyash amount ranges is 30% ~ 50%, and firing range is 1200 ~ 1300 DEG C; Gionee tiger waits (Chinese patent, CN201210282957.0, a kind of old garbage ground slag, lytag and manufacture method thereof) disclose a kind of old garbage ground slag, lytag and manufacture method thereof, its flyash amount ranges is 34% ~ 47%, and firing range is 1200 DEG C ~ 1280 DEG C; Yan Yun etc. (Chinese patent, CN201110163543.1, a kind of method of preparing light ceramic particle from pyrite cinder) disclose a kind of method of preparing light ceramic particle from pyrite cinder, and its firing temperature is at 1200 ~ 1250 DEG C; (the Chinese patent such as Dai Lizong, CN200810071615.8, a kind of take bottom silt as light ceramic of raw material and preparation method thereof) to disclose a kind of take bottom silt as light ceramic of raw material and preparation method thereof, its maximum sintering temperature also reaches 1250 DEG C; Zhang Jiyao etc. (Chinese patent, CN201110237966.3, a kind of material prescription and haydite thereof manufacturing gasifier slag haydite) disclose a kind of material prescription and the haydite thereof that manufacture gasifier slag haydite, and its firing temperature can up to 1300 DEG C; (the Chinese patent such as Wang Jinjun, CN201110127396.2, utilize the light ceramic that municipal sludge and printing and dyeing sludge manufacture) disclose a kind of light ceramic utilizing municipal sludge and printing and dyeing sludge to manufacture, its product tap density scope is 723 ~ 755kg/m
3, cylindrical compress strength scope is 6.13 ~ 6.65MPa.
Summary of the invention
The technical problem that the present invention solves is: although have the many methods preparing haydite of bibliographical information at present, ubiquitous problem comprises: a, raw material sources are limited, cost is high; B, firing temperature are high, production energy consumption is high; The quality index such as c, density, intensity, water-intake rate still have much room for improvement.At present gasification slag is applied to as raw material the patent documentation technology preparing light ceramic and still belongs to blank, if it can be used as raw material to be added on sintering prepares in light ceramic technique, not only can reduce the energy consumption in the density of haydite and sintering process, but also provide a new outlet for the recycling of solid waste gasification slag.
The object of the invention is: utilize solid waste coal ash and gasification slag, prepare light ceramic by scientific matching reasonable process, its feed distribution extensively, be easy to get, cost is low; In preparation process, firing temperature is low, save energy; Prepared product density is low, intensity is high, smooth surface, water-intake rate are low.
The present invention is that the comprehensive utilization of flyash and gasification slag provides a new technical support, can obtain good environmental benefit; The invention enables flyash and gasification slag " to turn waste into wealth ", fill up the blank utilizing gasification slag to prepare light ceramic field; Light ceramic of the present invention refers to that tap density is less than 1000kg/m
3porous aggregate, the apparent density scope of the preparation-obtained light ceramics of the present invention is≤1200kg/m
3, tap density scope is≤700kg/m
3, there is premium properties, good economic benefit can be obtained.
Specifically, for the deficiencies in the prior art, the invention provides following technical scheme:
The invention provides a kind of light ceramic utilizing flyash and gasification slag to prepare, it is characterized in that, it adopts the raw material containing following component to make:
Base-material 100 weight part: comprise flyash 40-90 weight part, gasification slag 10-30 weight part, potassium felspar sand 0-20 weight part and albite 0-20 weight part; With
Outer adding assistant 0-4 weight part: described outer adding assistant is selected from one or both of semicoke and silicon carbide.
Preferably, in above-mentioned light ceramic, described light ceramic adopts the raw material containing following component to make:
Base-material 100 weight part: comprise flyash 50-78 weight part, gasification slag 10-30 weight part, potassium felspar sand 8-20 weight part and albite 4-10 weight part.
Preferably, in above-mentioned light ceramic, described light ceramic adopts the raw material containing following component to make:
Base-material 100 weight part: comprise flyash 60-78 weight part, gasification slag 10-20 weight part, potassium felspar sand 8-20 weight part and albite 4-10 weight part.
Preferably, in above-mentioned light ceramic, described light ceramic adopts the raw material containing following component to make:
Base-material 100 weight part: comprise flyash 60-78 weight part, gasification slag 10-15 weight part, potassium felspar sand 8-20 weight part and albite 4-10 weight part.
Preferably, in above-mentioned light ceramic, described light ceramic adopts the raw material containing following component to make:
Base-material 100 weight part: comprise flyash 60-65 weight part, gasification slag 10-15 weight part, potassium felspar sand 15-20 weight part and albite 5-10 weight part.
Preferably, in above-mentioned light ceramic, described light ceramic adopts the raw material containing following component to make:
Base-material 100 weight part: comprise flyash 50-55 weight part, gasification slag 25-30 weight part, potassium felspar sand 13-15 weight part and albite 5-8 weight part.
Preferably, in above-mentioned light ceramic, described light ceramic adopts the raw material containing following component to make:
Base-material 100 weight part: flyash 65-67 weight part, gasification slag 25-30 weight part, potassium felspar sand 5-8 weight part.
Preferably, in above-mentioned light ceramic, described raw material also comprises in 100 weight part base-materials, the outer adding assistant of 0.8-2 weight part, is preferably 0.8-1.5 weight part, and described outer adding assistant is selected from one or both of semicoke and silicon carbide.
Preferably, in above-mentioned light ceramic, the apparent density of described light ceramic is 550-1200kg/m
3, tap density is 300-700kg/m
3, water-intake rate is 4%-12%, and cylindrical compress strength is 5-13MPa.
The present invention also provides the preparation method of above-mentioned light ceramic, comprises the steps:
(1) batching mixing: by composition mixing each in raw material;
(2) shaping: to make spherical by mixed raw material, particle diameter is 5-15mm;
(3) feed: by dispersed for shaping pellet loading saggar;
(4) firing process: spherical raw material is loaded in saggar, saggar is placed in resistance furnace or kiln, temperature is increased to top temperature from room temperature, burn till, obtain described light ceramic;
Wherein, described top temperature is 1120-1200 DEG C.
Preferably, in above-mentioned preparation method, described charging process comprise the steps: saggar bottom even tiling alumina powder jointed, at saggar wall also coating alumina slurry, by dispersed for shaping pellet loading saggar.
Preferably, in above-mentioned preparation method, described firing process comprises the steps:
(1) in 1-3 hour, temperature is increased to the first temperature from room temperature, and at the first temperature 0.5-2h;
(2) in 1.5-3.5 hour, temperature is increased to the second temperature from the first temperature, and at the second temperature 0.5-2h;
(3) in 2.5-5 hour, temperature is increased to the 3rd temperature from the second temperature, and at the 3rd temperature 0.5-2h;
(4) in 1.5-4 hour, temperature is increased to top temperature from the 3rd temperature, and at top temperature insulation 0.5-3h;
Wherein, described first temperature is 300-500 DEG C, and the second temperature is 600-700 DEG C, and the 3rd temperature is 900-1100 DEG C.
Preferably, in above-mentioned preparation method, described first temperature is 500 DEG C, and the second temperature is 700 DEG C, and the 3rd temperature is 1000 DEG C, or the first temperature is 300 DEG C, and the second temperature is 600 DEG C, and the 3rd temperature is 1000 DEG C.
Preferably, in above-mentioned preparation method, before firing process, also comprise drying process, described drying process comprises the steps: the saggar that shaping pellet is housed to be placed in electric drying oven with forced convection, dry 2-4 hour between 90-110 DEG C.
The present invention also provides above-mentioned light ceramic in the application of building material technical field.
Compared with prior art, effect of the present invention and benefit are:
1. feed distribution extensively, be easy to get, cost is low.Flyash is a kind of solid waste produced in coal-burning power plant's production process, and output accounts for 5 ~ 20% of coal-fired total amount, China's flyash annual emissions about 500,000,000 tons, high-volume more than 2,000,000,000 tons, current China flyash heap; Gasification slag is a kind of solid waste produced in coal gasifying process, is widely distributedly easy to get.Because main raw material (fly ash grain 40 ~ 90%, gasification solid impurity particle 10 ~ 30%) belongs to large industrial solid castoff, therefore raw materials cost is extremely low.
2. low, the save energy of firing temperature in preparation process.The invention provides a kind of light ceramic utilizing flyash and gasification slag to prepare, firing range is at 1120 ~ 1200 DEG C, and firing temperature is low, and energy consumption is little.The carbon content of gasification slag own is higher, and shatter value is good, and have certain calorific value, this also reduces energy consumption to a certain extent, and contributes to reducing haydite density.
3. the product density prepared by is low, intensity is high, smooth surface, water-intake rate are low.The invention provides a kind of light ceramic utilizing flyash and gasification slag to prepare, apparent density scope is≤1200kg/m
3, tap density scope is≤700kg/m
3, strength range is>=5.0Mpa, and water-intake rate scope is≤12%.
4., for solid waste coal ash and gasification slag recycling provide a new way, filled up the blank utilizing gasification slag to prepare light ceramic field.High-volume more than 2,000,000,000 tons, current China flyash heap, stores up grey field land occupation about 4 × 10
4km
2, this is serious environment pollution not only, also occupies a large amount of land resources.The invention provides a kind of light ceramic utilizing flyash and gasification slag to prepare, flyash consumption is 40 ~ 90%, and gasification solid impurity particle 10 ~ 30%, this is undoubtedly for solid waste coal ash and gasification slag provide a utilization ways.Patent documentation quantity at present about gasification slag recycling is very limited, and all concentrates on secondary combustion field, and light ceramic of the present invention has filled up the blank utilizing gasification slag to prepare light ceramic field.
Accompanying drawing explanation
Fig. 1 is the process route chart preparing haydite in prior art.
Fig. 2 is the process route chart preparing light ceramic in embodiment of the present invention.
Embodiment
Tradition prepares the technique of haydite as shown in Figure 1: mixed with batching by raw material, through roasting, cooling after shaping, forms haydite finished product.The problem that preparation method in view of current haydite exists that raw materials cost is high, firing temperature is high, product density has to be reduced, the quality index such as intensity, water-intake rate still to have much room for improvement, the present invention chooses gasification slag and is applied to as raw material and prepares light ceramic, provides a kind of light ceramic utilizing flyash and gasification slag to prepare and preparation method thereof.As shown in Figure 2, the present invention with flyash and gasification slag for raw material, optionally, after other ball millings of preparing burden, mixing, add water shaping, feed in the saggar of coating alumina powder, after oven drying, at resistance kiln roasting, obtain haydite finished product.
One of the present invention preferred embodiment in, the preparation technology of light ceramic comprises the steps:
A, pre-treatment: flyash and gasification slag raw material are dried through 80 DEG C ~ 110 DEG C air dry ovens, flyash after drying is carried out appropriate ball milling with gasification slag raw material, afterwards flyash and gasification slag raw material are crossed 100 mesh sieves respectively, screen over-size is less than 5%, encapsulates stand-by;
B, batching mixing: form according to weight percent: flyash 40 ~ 90%, gasification slag 10 ~ 30%, potassium felspar sand 0 ~ 20%, albite 0 ~ 20%, outer adding assistant (semicoke, silicon carbide, or semicoke and silicon carbide use jointly) 0 ~ 4% carry out weighing, by flyash, gasification slag, potassium felspar sand, albite, auxiliary agent Homogeneous phase mixing together;
C, shaping: in mixing raw material, to add amount of water, adopt craft or machine automatization balling-up, balling-up particle size range is 5 ~ 15mm;
D, charging: saggar bottom even tiling alumina powder jointed, at saggar wall also coating alumina slurry, by dispersed for shaping pellet loading saggar;
E, drying: the saggar that shaping pellet is housed is placed in electric drying oven with forced convection, dry 2 ~ 4h at 100 DEG C of temperature;
F, firing process: saggar is placed in resistance furnace or kiln, heat 1 ~ 3h between room temperature ~ the first temperature (300-500 DEG C), and at first temperature 0.5 ~ 2h; 1.5 ~ 3.5h is heated between the first temperature ~ the second temperature (600-700 DEG C), and at second temperature 0.5 ~ 2h; 2.5 ~ 5h is heated between the second temperature ~ the 3rd temperature (900-1100 DEG C), and at the 3rd temperature 0.5 ~ 2h; 1.5 ~ 4h is heated between three temperature ~ top temperature point (1120 ~ 1200 DEG C), and at top temperature point insulation 0.5 ~ 3h;
G, finished product: through the haydite sample fired, along with furnace temperature naturally cools to room temperature, take out and obtain described light ceramic finished product.
Flyash consumption of the present invention is 40 ~ 90%, and gasification solid impurity particle 10 ~ 30%, firing temperature is 1120 ~ 1200 DEG C, energy efficient, and feed distribution more extensively, is more easy to get.Light ceramic tap density scope of the present invention is≤700kg/m
3, quality is lighter, cylindrical compress strength can be higher up to more than 10MPa, intensity, and feed distribution more extensively, is more easy to get.
The preparation method of light ceramic of the present invention is further illustrated below by specific embodiment.
In following embodiment, the producer of agents useful for same, instrument and specification are as shown in table 1,2.
Raw materials used information in table 1 embodiment
Wherein, flyash and gasification slag belong to solid waste, and it is Chang Imperial Tomb, Guangzhou Industrial Co., Ltd. that described potassium felspar sand and albite buy producer, and the purchase producer of aluminum oxide is Tianjin Fengchuan Chemical Reagent Science & Technology Co., Ltd..
The present invention's flyash used is GB one-level dry powder coal ash, and its main component (in weight content) can be SiO
2: 50 ~ 60%, Al
2o
3: 20 ~ 40%, Fe
2o
3: 3 ~ 10%, CaO:4 ~ 7%, the oxide compound of the elements such as all the other magnesium, potassium, sodium accounts for 5 ~ 15%.
The present invention's gasification slag used main component can be (in weight content): SiO
2: 40 ~ 55%, Al
2o
3: 10 ~ 20%, Fe
2o
3: 5 ~ 10%, CaO:10 ~ 20%, the oxide compound of the elements such as all the other magnesium, potassium, sodium accounts for 3 ~ 10%.
The information of instrument in table 2 embodiment
| Title | Producer | Model |
| Resistance furnace | Tianjin Zhong Huan experimental electric furnace company limited | Sx-g04133 |
| Planetary ball mill | Nanjing Univ. Instrument Factory | QM-3SP2 |
| Electric drying oven with forced convection | Tianjin Zhong Huan experimental electric furnace company limited | DH-101-2BS |
| Saggar | Ying Hui alumina porcelain factory of Gongyi City | 12mm×8.5mm×5mm |
Embodiment one
Prepare light ceramic with flyash and gasification slag, comprise the steps:
A, pre-treatment: through 100 DEG C of air dry oven ovendry power coal ash and gasification slag raw material, flyash after drying is carried out appropriate ball milling with gasification slag raw material, afterwards flyash and gasification slag raw material are crossed 100 mesh sieves (Taylor system standard sieve) respectively, screen over-size is less than 5%, encapsulates stand-by; 200 mesh sieves crossed by other raw materials, encapsulate stand-by;
B, batching mixing: form according to weight percent: base-material: flyash 50%, gasification slag 30%, potassium felspar sand 14%, albite 6%, auxiliary agent: silicon carbide 1% is (additional, silicon carbide quality accounts for 1% of base-material) carry out weighing, base-material total mass is 50g, by flyash, gasification slag, potassium felspar sand, albite, silicon carbide Homogeneous phase mixing together;
C, shaping: in mixing raw material, to add the moisture accounting for mixing raw material total mass 2%, adopt machine automatization balling-up, balling-up particle size range is 10 ~ 12mm;
D, charging: saggar bottom even tiling alumina powder jointed, at saggar wall also coating alumina slurry, by dispersed for shaping pellet loading saggar; Wherein, the preparation method of described alumina slurry is: Xylo-Mucine is soluble in water, makes the liquid that weight percent is 5%, takes quantitative aluminum oxide powder and aforesaid liquid carries out mix and blend, makes quality of alumina mark be 40%.
E, drying: the saggar that shaping pellet is housed is placed in electric drying oven with forced convection, dry 4h at 100 DEG C of temperature;
F, firing process: saggar is placed in resistance furnace or kiln, 500 DEG C are heated to through 2h, insulation 0.5h, through 1.5h, temperature is risen to 700 DEG C from 500 DEG C, insulation 2h, rises to 1000 DEG C by temperature from 700 DEG C through 3h, insulation 1h, through 3h, temperature is risen to 1160 DEG C from 1000 DEG C, and at 1160 DEG C of insulation 1.5h;
G, finished product: through the haydite sample fired, along with furnace temperature naturally cools to room temperature, take out and obtain light ceramic finished product of the present invention.
Described light ceramic the performance test results is as follows:
Apparent density is 596kg/m
3, tap density is 331kg/m
3, water-intake rate is 10.9%, and cylindrical compress strength is 6.8MPa.
Wherein, described apparent density, tap density, water-intake rate and cylindrical compress strength detect according to standard GB/T/T17431.2-2010 " light-weight aggregate and test method part 2 thereof: light-weight aggregate test method " and obtain, and detailed process is as follows:
(1) testing process of apparent density is: get haydite sample drying to constant weight, put into the graduated cylinder be filled with water, after immersing 1h, pour drainage in sieve into, then pour in the wet towel wrung out and wipe excess surface moisture, poured into by sample in 1000mL graduated cylinder, reinject 500mL clear water, float on waterborne if any sample, available known volume circular metal plate (V
2) be pressed in water, read graduated cylinder water level (V
1), calculate apparent density ρ with following formula
1:
ρ
1＝1000×m/(V
1-V
2-500)
Wherein, m is sample mass, V
1for the cumulative volume of sample, circular metal plate and water, V
2for the volume of circular metal plate.
(2) testing process of tap density is: by haydite samples dried to constant weight, evenly pours into above capacity tube, allows haydite naturally fall, capacity fill cylinder, after the haydite that surface indentation place granularity is less is filled and led up, read volume, draw tap density ρ by following calculation formula
2:
ρ
2＝1000×(m
1-m
2)/V
Wherein, m
1for the total mass of sample and capacity tube, m
2for capacity tube quality, V is capacity tube volume.
(3) testing process of cylindrical compress strength is: by method in above-mentioned (2) tap density, haydite is filled up pressure-bearing cylinder, load onto guide cylinder and punching die, pressure-bearing cylinder is placed on manometric press table, aim at pressing plate center, with the at the uniform velocity loading of the speed of 350N per second, when punching die compression distance is 20mm, write down force value, draw cylindrical compress strength f with following formulae discovery:
f＝(p
1+p
2)/F
Wherein, p
1for force value when compression distance is 20mm, p
2for punching die quality, F is carrying area.
(4) testing process of water-intake rate is: get haydite sample drying to constant weight, put into the container be filled with water, and after immersing 1h, pours drainage in sieve into, then pours in the wet towel wrung out and wipe excess surface moisture, weigh.Water-intake rate w is drawn by following calculation formula:
w＝100×(g
1-g
2)/g
1
Wherein, w is the water-intake rate of haydite 1h, g
1for sample mass after soaking, g
2for drying rear sample mass.
Embodiment two
Utilize flyash and gasification slag to prepare light ceramic, comprise the steps:
A, pre-treatment: through 100 DEG C of air dry oven ovendry power coal ash and gasification slag raw material, carry out appropriate ball milling by the flyash after drying with gasification slag raw material, and afterwards flyash and gasification slag raw material are crossed 100 mesh sieves respectively, screen over-size is less than 5%, encapsulates stand-by;
B, batching mixing: form according to weight percent: base-material: flyash 60%, gasification slag 10%, potassium felspar sand 20%, albite 10%, auxiliary agent: silicon carbide 0.8% is (additional, silicon carbide quality accounts for 0.8% of base-material) carry out weighing, base-material total mass is 50g, by flyash, gasification slag, potassium felspar sand, albite, silicon carbide Homogeneous phase mixing together;
C, shaping: in mixing raw material, to add amount of water, adopt machine automatization balling-up, balling-up particle size range is 7 ~ 12mm;
D, charging: saggar bottom even tiling alumina powder jointed, at saggar wall also coating alumina slurry, by dispersed for shaping pellet loading saggar;
E, drying: the saggar that shaping pellet is housed is placed in electric drying oven with forced convection, dry 4h at 100 DEG C of temperature;
F, firing process: saggar is placed in resistance furnace or kiln, through 1h from room temperature to 300 DEG C, insulation 0.5h, be heated to 600 DEG C through 1.5h, insulation 0.5h, is heated to 1000 DEG C through 2h, insulation 1h, is heated to 1140 DEG C through 2h, and at 1140 DEG C of insulation 2h;
G, finished product: through the haydite sample fired, along with furnace temperature naturally cools to room temperature, take out and obtain light ceramic finished product of the present invention.
The performance test results recording light ceramic described in embodiment two by method described in embodiment one is as follows:
Apparent density is 1051kg/m
3, tap density is 586kg/m
3, water-intake rate is 5.1%, and cylindrical compress strength is 11.7MPa.
Embodiment three
Utilize flyash and gasification slag to prepare light ceramic, comprise the following steps:
A, pre-treatment: through 100 DEG C of air dry oven ovendry power coal ash and gasification slag raw material, carry out appropriate ball milling by the flyash after drying with gasification slag raw material, and afterwards flyash and gasification slag raw material are crossed 100 mesh sieves respectively, screen over-size is less than 5%, encapsulates stand-by;
B, batching mixing: form according to weight percent: base-material: flyash 78%, gasification slag 10%, potassium felspar sand 8%, albite 4%, auxiliary agent: silicon carbide 0.5% is (additional, silicon carbide quality accounts for 0.5% of base-material), semicoke 1% is (additional, semicoke quality accounts for 1% of base-material), base-material total mass is 50g, carry out weighing, by flyash, gasification slag, potassium felspar sand, albite, silicon carbide Homogeneous phase mixing together;
C, shaping: in mixing raw material, to add amount of water, adopt machine automatization balling-up, balling-up particle size range is 6 ~ 15mm;
D, charging: saggar bottom even tiling alumina powder jointed, at saggar wall also coating alumina slurry, by dispersed for shaping pellet loading saggar;
E, drying: the saggar that shaping pellet is housed is placed in electric drying oven with forced convection, dry 4h at 100 DEG C of temperature;
F, firing process: saggar is placed in resistance furnace or kiln, through 1.5h from room temperature to 300 DEG C, insulation 0.5h, be heated to 600 DEG C through 1.5h, insulation 1h, is heated to 1000 DEG C through 2h, insulation 1h, is heated to 1200 DEG C through 1.5h, and at 1200 DEG C of insulation 2h;
G, finished product: through the haydite sample fired, along with furnace temperature naturally cools to room temperature, take out and obtain light ceramic finished product of the present invention.
The performance test results recording light ceramic described in embodiment three by method described in embodiment one is as follows:
Apparent density is 1099kg/m
3, tap density is 604kg/m
3, water-intake rate is 4.5%, and cylindrical compress strength is 12.2MPa.
Embodiment four
Utilize flyash and gasification slag to prepare light ceramic, comprise the following steps:
A, pre-treatment: through 100 DEG C of air dry oven ovendry power coal ash and gasification slag raw material, carry out appropriate ball milling by the flyash after drying with gasification slag raw material, and afterwards flyash and gasification slag raw material are crossed 100 mesh sieves respectively, screen over-size is less than 5%, encapsulates stand-by;
B, batching mixing: form according to weight percent: base-material: flyash 69%, gasification slag 19%, potassium felspar sand 8%, albite 4%, auxiliary agent: silicon carbide 1% (additional) carries out weighing, base-material total mass is 50g, by flyash, gasification slag, potassium felspar sand, albite, silicon carbide Homogeneous phase mixing together;
C, shaping: in mixing raw material, add amount of water, adopt manual balling-up, balling-up particle size range is 5 ~ 12mm;
D, charging: saggar bottom even tiling alumina powder jointed, at saggar wall also coating alumina slurry, by dispersed for shaping pellet loading saggar;
E, drying: the saggar that shaping pellet is housed is placed in electric drying oven with forced convection, dry 4h at 100 DEG C of temperature;
F, firing process: saggar is placed in resistance furnace or kiln, be warming up to 300 DEG C through 1h, insulation 1h, be heated to 600 DEG C through 1.5h, insulation 1h, is heated to 1000 DEG C through 2h, insulation 0.5h, is heated to 1170 DEG C through 1.5h, and at 1170 DEG C of insulation 2h;
G, finished product: through the haydite sample fired, along with furnace temperature naturally cools to room temperature, take out and obtain light ceramic finished product of the present invention.
The performance test results recording light ceramic described in embodiment four by method described in embodiment one is as follows:
Apparent density is 975kg/m
3, tap density is 544kg/m
3, water-intake rate is 6.7%, and cylindrical compress strength is 9.4MPa.
Embodiment five
Utilize flyash and gasification slag to prepare light ceramic, comprise the following steps:
A, pre-treatment: through 100 DEG C of air dry oven ovendry power coal ash and gasification slag raw material, carry out appropriate ball milling by the flyash after drying with gasification slag raw material, and afterwards flyash and gasification slag raw material are crossed 100 mesh sieves respectively, screen over-size is less than 5%, encapsulates stand-by;
B, batching mixing: form according to weight percent: base-material: flyash 40%, gasification slag 30%, potassium felspar sand 20%, albite 10%, auxiliary agent: silicon carbide 0.3% is (additional, silicon carbide quality accounts for 0.3% of base-material) carry out weighing, base-material total mass is 50g, by flyash, gasification slag, potassium felspar sand, albite, silicon carbide Homogeneous phase mixing together;
C, shaping: in mixing raw material, to add amount of water, adopt machine automatization balling-up, balling-up particle size range is 7 ~ 12mm;
D, charging: saggar bottom even tiling alumina powder jointed, at saggar wall also coating alumina slurry, by dispersed for shaping pellet loading saggar;
E, drying: the saggar that shaping pellet is housed is placed in electric drying oven with forced convection, dry 4h at 100 DEG C of temperature;
F, firing process: saggar is placed in resistance furnace or kiln, through 3h from room temperature to 400 DEG C, insulation 2h, be heated to 650 DEG C through 2.5h, insulation 1.5h, is heated to 900 DEG C through 2.5h, insulation 1h, is heated to 1120 DEG C through 1.5h, and at 1120 DEG C of insulation 1.5h;
G, finished product: through the haydite sample fired, along with furnace temperature naturally cools to room temperature, take out and obtain light ceramic finished product of the present invention.
The performance test results recording light ceramic described in embodiment five by method described in embodiment one is as follows:
Apparent density is 1091kg/m
3, tap density is 590kg/m
3, water-intake rate is 7.2%, and cylindrical compress strength is 7.9MPa.
Embodiment six
Utilize flyash and gasification slag to prepare light ceramic, comprise the following steps:
A, pre-treatment: through 100 DEG C of air dry oven ovendry power coal ash and gasification slag raw material, carry out appropriate ball milling by the flyash after drying with gasification slag raw material, and afterwards flyash and gasification slag raw material are crossed 100 mesh sieves respectively, screen over-size is less than 5%, encapsulates stand-by;
B, batching mixing: form according to weight percent: base-material: flyash 90%, gasification slag 6%, albite 4%, auxiliary agent: silicon carbide 0.9%, semicoke 2.6% carries out weighing, base-material total mass is 50g, by flyash, gasification slag, potassium felspar sand, albite, silicon carbide Homogeneous phase mixing together;
C, shaping: in mixing raw material, to add amount of water, adopt machine automatization balling-up, balling-up particle size range is 7 ~ 12mm;
D, charging: saggar bottom even tiling alumina powder jointed, at saggar wall also coating alumina slurry, by dispersed for shaping pellet loading saggar;
E, drying: the saggar that shaping pellet is housed is placed in electric drying oven with forced convection, dry 4h at 100 DEG C of temperature;
F, firing process: saggar is placed in resistance furnace or kiln, through 1h from room temperature to 500 DEG C, insulation 0.5h, be heated to 700 DEG C through 3.5h, insulation 0.5h, is heated to 1100 DEG C through 3h, insulation 0.5h, is heated to 1150 DEG C through 1.5h, and at 1150 DEG C of insulation 2.5h;
G, finished product: through the haydite sample fired, along with furnace temperature naturally cools to room temperature, take out and obtain light ceramic finished product of the present invention.
The performance test results recording light ceramic described in embodiment six by method described in embodiment one is as follows:
Apparent density is 1068kg/m
3, tap density is 569kg/m
3, water-intake rate is 5.9%, and cylindrical compress strength is 10.2MPa.
Embodiment seven
Utilize flyash and gasification slag to prepare light ceramic, comprise the following steps:
A, pre-treatment: through 100 DEG C of air dry oven ovendry power coal ash and gasification slag raw material, carry out appropriate ball milling by the flyash after drying with gasification slag raw material, and afterwards flyash and gasification slag raw material are crossed 100 mesh sieves respectively, screen over-size is less than 5%, encapsulates stand-by;
B, batching mixing: form according to weight percent: base-material: flyash 65%, gasification slag 30%, potassium felspar sand 5%, auxiliary agent: silicon carbide 1%, semicoke 1% carries out weighing, and base-material total mass is 50g, by flyash, gasification slag, potassium felspar sand, albite, silicon carbide Homogeneous phase mixing together;
C, shaping: in mixing raw material, to add amount of water, adopt machine automatization balling-up, balling-up particle size range is 5 ~ 12mm;
D, charging: saggar bottom even tiling alumina powder jointed, at saggar wall also coating alumina slurry, by dispersed for shaping pellet loading saggar;
E, drying: the saggar that shaping pellet is housed is placed in electric drying oven with forced convection, dry 4h at 100 DEG C of temperature;
F, firing process: saggar is placed in resistance furnace or kiln, through 3h from room temperature to 500 DEG C, insulation 0.5h, be heated to 700 DEG C through 1.5h, insulation 0.5h, is heated to 1100 DEG C through 5h, insulation 1h, is heated to 1200 DEG C through 3h, and at 1200 DEG C of insulation 0.5h;
G, finished product: through the haydite sample fired, along with furnace temperature naturally cools to room temperature, take out and obtain light ceramic finished product of the present invention.
The performance test results recording light ceramic described in embodiment seven by method described in embodiment one is as follows:
Apparent density is 833kg/m
3, tap density is 462kg/m
3, water-intake rate is 7.0%, and cylindrical compress strength is 9.1MPa.
Embodiment eight
Utilize flyash and gasification slag to prepare light ceramic, comprise the following steps:
A, pre-treatment: through 100 DEG C of air dry oven ovendry power coal ash and gasification slag raw material, carry out appropriate ball milling by the flyash after drying with gasification slag raw material, and afterwards flyash and gasification slag raw material are crossed 100 mesh sieves respectively, screen over-size is less than 5%, encapsulates stand-by;
B, batching mixing: form according to weight percent: base-material: flyash 90%, gasification slag 10%, auxiliary agent: silicon carbide 1%, semicoke 2% carries out weighing, and base-material total mass is 50g, by flyash, gasification slag, potassium felspar sand, albite, silicon carbide Homogeneous phase mixing together;
C, shaping: in mixing raw material, to add amount of water, adopt machine automatization balling-up, balling-up particle size range is 5 ~ 12mm;
D, charging: saggar bottom even tiling alumina powder jointed, at saggar wall also coating alumina slurry, by dispersed for shaping pellet loading saggar;
E, drying: the saggar that shaping pellet is housed is placed in electric drying oven with forced convection, dry 4h at 100 DEG C of temperature;
F, firing process: saggar is placed in resistance furnace or kiln, through 2.5h from room temperature to 500 DEG C, insulation 0.5h, be heated to 700 DEG C through 3.5h, insulation 2h, is heated to 1000 DEG C through 2.5h, insulation 0.5h, is heated to 1200 DEG C through 1.5h, and at 1200 DEG C of insulation 3h; ;
G, finished product: through the haydite sample fired, along with furnace temperature naturally cools to room temperature, take out and obtain light ceramic finished product of the present invention.
The performance test results recording light ceramic described in embodiment seven by method described in embodiment one is as follows:
Apparent density is 1124kg/m
3, tap density is 660kg/m
3, water-intake rate is 6.5%, and cylindrical compress strength is 10.1MPa.
Comparative example one
Prepare light ceramic with embodiment two simulated condition, difference be only: in raw material, base-material is: flyash 70%, potassium felspar sand 20%, albite 10%, with embodiment two identical parameters condition under prepare light ceramic.
Detect light ceramic performance, result is: apparent density 1320kg/m
3, tap density 813kg/m
3, water-intake rate 5.0%, cylindrical compress strength 11.9MPa.
Compared with the embodiment of the present invention, light ceramic density prepared under nothing gasification slag condition is larger.
Comparative example two
Prepare light ceramic with embodiment two simulated condition, difference be only: in raw material, base-material is: gasification slag 60%, potassium felspar sand 20%, albite 20%, with embodiment two identical parameters condition under prepare light ceramic.
Detect light ceramic performance, result is: apparent density 427kg/m
3, tap density 285kg/m
3, water-intake rate 23.6%, cylindrical compress strength 1.4MPa.
Compared with the embodiment of the present invention, light ceramic water-intake rate prepared under without flyash condition is comparatively large, and cylindrical compress strength is less, illustrates that preparation method of the present invention has more excellent technique effect.
Comparative example three
Prepare light ceramic with embodiment two simulated condition, difference be only: in raw material, base-material is: flyash is 30%, gasification slag 50%, potassium felspar sand 10%, albite 10%, with embodiment two identical parameters condition under prepare light ceramic.
Detect light ceramic performance, result is: apparent density 588kg/m
3, tap density 314kg/m
3, water-intake rate 15.1%, cylindrical compress strength 2.6MPa.
Comparative example four
Prepare light ceramic with embodiment two simulated condition, difference be only: in raw material, base-material is: flyash is 95%, gasification slag 5%, with embodiment two identical parameters condition under prepare light ceramic.
Detect light ceramic performance, result is: apparent density 1827kg/m
3, tap density 1013kg/m
3, water-intake rate 5.2%, cylindrical compress strength 12.3MPa.
Can be drawn by comparative example three and four, when fly ash content exceeds scope of the present invention, its density is larger; When the slag content that gasifies exceeds scope of the present invention, its water-intake rate is comparatively large, and its cylindrical compress strength reduces.
In sum, products obtained therefrom of the present invention raw materials used widely distributed, be easy to get, cost is low; Low, the save energy of firing temperature in preparation process; Prepared product density is low, intensity is high, smooth surface, water-intake rate are low; For solid waste coal ash and gasification slag recycling provide a new way, fill up the blank utilizing gasification slag to prepare light ceramic field.
Claims (15)
1. utilize a light ceramic prepared by flyash and gasification slag, it is characterized in that, it adopts the raw material containing following component to make:
Base-material 100 weight part: comprise flyash 40-90 weight part, gasification slag 10-30 weight part, potassium felspar sand 0-20 weight part and albite 0-20 weight part; With
Outer adding assistant 0-4 weight part: described outer adding assistant is selected from one or both of semicoke and silicon carbide.
2. light ceramic according to claim 1, wherein, described light ceramic adopts the raw material containing following component to make:
Base-material 100 weight part: comprise flyash 50-78 weight part, gasification slag 10-30 weight part, potassium felspar sand 8-20 weight part and albite 4-10 weight part.
3. light ceramic according to claim 1 and 2, wherein, described light ceramic adopts the raw material containing following component to make:
Base-material 100 weight part: comprise flyash 60-78 weight part, gasification slag 10-20 weight part, potassium felspar sand 8-20 weight part and albite 4-10 weight part.
4. the light ceramic according to Claims 2 or 3, wherein, described light ceramic adopts the raw material containing following component to make:
Base-material 100 weight part: comprise flyash 60-78 weight part, gasification slag 10-15 weight part, potassium felspar sand 8-20 weight part and albite 4-10 weight part.
5. the light ceramic according to any one of claim 2-4, wherein, described light ceramic adopts the raw material containing following component to make:
Base-material 100 weight part: comprise flyash 60-65 weight part, gasification slag 10-15 weight part, potassium felspar sand 15-20 weight part and albite 5-10 weight part.
6. light ceramic according to claim 1, wherein, described light ceramic adopts the raw material containing following component to make:
Base-material 100 weight part: comprise flyash 50-55 weight part, gasification slag 25-30 weight part, potassium felspar sand 13-15 weight part and albite 5-8 weight part.
7. want the light ceramic described in 1 according to right, wherein, described light ceramic adopts the raw material containing following component to make:
Base-material 100 weight part: flyash 65-67 weight part, gasification slag 25-30 weight part, potassium felspar sand 5-8 weight part.
8. the light ceramic according to any one of claim 2-7, wherein, described raw material also comprises in 100 weight part base-materials, the outer adding assistant of 0.8-2 weight part, is preferably 0.8-1.5 weight part, and described outer adding assistant is selected from one or both of semicoke and silicon carbide.
9. the light ceramic according to any one of claim 1-8, the apparent density of described light ceramic is 550-1200kg/m3, and tap density is 300-700kg/m3, and water-intake rate is 4%-12%, and cylindrical compress strength is 5-13MPa.
10. the preparation method of light ceramic described in any one of claim 1-9, comprises the steps:
(1) batching mixing: by composition mixing each in raw material;
(2) shaping: to make spherical by mixed raw material, particle diameter is 5-15mm;
(3) feed: by dispersed for shaping pellet loading saggar;
(4) firing process: spherical raw material is loaded in saggar, saggar is placed in resistance furnace or kiln, temperature is increased to top temperature from room temperature, burn till, obtain described light ceramic;
Wherein, described top temperature is 1120-1200 DEG C.
11. preparation methods according to claim 10, wherein, described charging process comprise the steps: saggar bottom even tiling alumina powder jointed, at saggar wall also coating alumina slurry, by dispersed for shaping pellet loading saggar.
12. the preparation method according to claim 10 or 11, wherein, described firing process comprises the steps:
(1) in 1-3 hour, temperature is increased to the first temperature from room temperature, and at the first temperature 0.5-2h;
(2) in 1.5-3.5 hour, temperature is increased to the second temperature from the first temperature, and at the second temperature 0.5-2h;
(3) in 2.5-5 hour, temperature is increased to the 3rd temperature from the second temperature, and at the 3rd temperature 0.5-2h;
(4) in 1.5-4 hour, temperature is increased to top temperature from the 3rd temperature, and at top temperature insulation 0.5-3h;
Wherein, described first temperature is 300-500 DEG C, and the second temperature is 600-700 DEG C, and the 3rd temperature is 900-1100 DEG C.
13. preparation methods according to claim 12, wherein, described first temperature is 500 DEG C, and the second temperature is 700 DEG C, and the 3rd temperature is 1000 DEG C, or the first temperature is 300 DEG C, and the second temperature is 600 DEG C, and the 3rd temperature is 1000 DEG C.
14. preparation methods according to any one of claim 10-13, wherein, before firing process, also comprise drying process, described drying process comprises the steps: the saggar that shaping pellet is housed to be placed in electric drying oven with forced convection, dry 2-4 hour between 90-110 DEG C.
Described in 15. any one of claim 1-9, light ceramic is in the application of building material technical field.
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