CN104478259A - Low-cost thermal power plant pulverized fuel ash floating bead surface treatment method - Google Patents
Low-cost thermal power plant pulverized fuel ash floating bead surface treatment method Download PDFInfo
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- CN104478259A CN104478259A CN201410658495.7A CN201410658495A CN104478259A CN 104478259 A CN104478259 A CN 104478259A CN 201410658495 A CN201410658495 A CN 201410658495A CN 104478259 A CN104478259 A CN 104478259A
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Abstract
The invention discloses a low-cost thermal power plant pulverized fuel ash floating bead surface treatment method which comprises the following steps: adding water into thermal power plant pulverized fuel ash floating beads and a low-temperature fluxing agent, uniformly mixing, calcining the mixture in a roller furnace, dispersing and screening the calcined aggregates, thereby obtaining the product, wherein the used low-temperature fluxing agent is formed from glass powder, szaibelyite powder and bentonite according to a certain ratio. The treated plant pulverized fuel ash floating bead aggregate has the characteristics of low heat conductivity, high strength and high hydrophobicity, the performance can basically achieve or be close to the service effects of materials such as lightweight aggregate, glass beads, vitrified perlite beads and silica sol beads, the requirement of preparation of building wall heat insulation materials is met, the method disclosed by the invention is simple and convenient in process, energy-saving, environment-friendly, low in calcination temperature and low in production cost, and the treated aggregate is excellent in performance and has good popularization prospects.
Description
Technical field
The present invention relates to fine coal treatment process technical field, particularly a kind of low cost thermoelectric factory fly ash float surface treatment method.
Background technology
Building energy conservation has become the energy-conservation main aspect of China.Be no matter the lightweight of building, the wall thermal insulating etc. of building all needs the aglite of low heat conductivity, high-strength, high hydrophobic.The floating bead pulverized fuel ash of present heat power plant is mainly used in cement additive and refractory materials adds raw material, patent application " 200710015190.4 pulverized-fuel-ash aggregate method for prefabricating " is namely like this, main raw material(s) is cement, binding agent, pottery sand and water, cement is 1: 0.01: 5-1: 0.03: 8 than the weight ratio of binding agent ratio pottery sand, and amount of water makes light bone meal balling-up be as the criterion with the water content of sand of making pottery; Cement, binding agent, pottery sand and water are poured in forced mixer in proportion and stirs, then balling-up in nodulizer is delivered to, moisture-keeping maintaining turning after 48 hours after balling-up, moisture-keeping maintaining dries afterwards naturally on the 25th again, the aggregate thermal conductivity that above-mentioned prior art is produced is large, intensity is also inadequate, and hydrophobic rate is low.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of low cost thermoelectric factory fly ash float surface treatment method, existing fly ash float is wrapped up and calcines, thus reach the object of modification, the aglite of low thermal conductivity, high hydrophobic rate, high strength can be obtained, be widely used in that making gently collects concrete, light thermal-insulation turns, the raw material of lagging material etc., have that simple process, production cost are low, the feature of energy-conserving and environment-protective.
In order to achieve the above object, the technical scheme that the present invention takes is:
A kind of low cost thermoelectric factory fly ash float surface treatment method, step is as follows:
Step 1: be that the fly ash float of 0.18-0.25 ㎜ first puts into mixer by diameter, and add the water of fly ash float quality 5%, stir 5 minutes, stirring velocity 600r/min, add flux again in mixer, the mass ratio of fly ash float and flux is (70 ~ 80): (20 ~ 30), stirs 30 minutes, stirring velocity 600r/min;
Step 2: the compound of step 1 gained is put into roller stove, is heated to 850-950 DEG C by roller furnace temperature, is incubated after 20-30 minute, is cooled to normal temperature, the pellet calcined come out of the stove after through breaing up, cross 200 mesh sieves, obtain aglite.
The powder fineness of described flux is 0.063 ㎜, be glass powder, Magnesium Borate Ore Powder and bentonitic mixture, and three's butt mass ratio is 75:20:5.
Fly ash float aggregate performance index through process of the present invention: balling ratio 80-95%, water-intake rate (% that vacuum filtration method measures) 20-50%, ultimate compression strength >=350MPa, thermal conductivity reaches 0.082-0.153w/mk, use temperature≤800 DEG C.
A kind of low cost thermoelectric factory fly ash float surface treatment method that the present invention adopts; existing fly ash float is wrapped up and calcines; thus reach the object of modification; modified pellet shape is hollow appearance vitreous spheroid; there is the feature of low heat conduction, high strength, high hydrophobic; its performance can reach or substantially close to the result of use of materials such as " light ceramic, glass microballon, vitreous pearlite microballon, silicon sol microballons ", thus meets the requirement preparing construction wall lagging material.The inventive method raw material is chosen and is belonged to resource reutilization category; energy-conserving and environment-protective; calcining process simple process more equal to light ceramic, glass microballon, vitreous pearlite etc.; calcining temperature is lower; therefore production cost is lower; not only Performance comparision is excellent for the aggregate of process gained, and simple process, has good promotion prospect.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment one:
Step 1: be that the fly ash float of 0.25 ㎜ first puts into mixer by diameter, and add the water of fly ash float quality 5%, stir 5 minutes, stirring velocity 600r/min, then add flux in mixer, the mass ratio of fly ash float and flux is 80:20, stir 30 minutes, stirring velocity 600r/min, the powder fineness of described flux is 0.063 ㎜, be glass powder, Magnesium Borate Ore Powder and bentonitic mixture, and three's butt mass ratio is 75:20:5;
Step 2: the compound of step 1 gained is put into roller stove, is heated to 900 DEG C by roller furnace temperature, is incubated after 30 minutes, is cooled to normal temperature, the pellet calcined come out of the stove after through breaing up, cross 200 mesh sieves, obtain aglite.
The aggregate performance that the present embodiment obtains is: density: 0.31 gram/cc; Thermal conductivity: 0.091w/mk; Ultimate compression strength: 353MPa; Water-intake rate (% that vacuum filtration method measures): 46%; Balling ratio: 81.6%.
Embodiment two:
Step 1: be that the fly ash float of 0.22 ㎜ first adds mixer by diameter, and add the water of fly ash float quality 5%, stir 5 minutes, stirring velocity 600r/min, then add flux in mixer, the mass ratio of fly ash float and flux is 75:25, stir 30 minutes, stirring velocity 600r/min, the powder fineness of described flux is 0.063 ㎜, be glass powder, Magnesium Borate Ore Powder and bentonitic mixture, and three's butt mass ratio is 75:20:5;
Step 2: the compound of step 1 gained is put into roller stove, is heated to 860 DEG C by roller furnace temperature, is incubated after 30 minutes, is cooled to normal temperature, the pellet calcined come out of the stove after through breaing up, cross 200 mesh sieves, obtain aglite.
The aggregate performance that the present embodiment obtains is: density: 0.33 gram/cc; Thermal conductivity: 0.105w/mk; Ultimate compression strength: 361MPa; Water-intake rate (% that vacuum filtration method measures): 40%; Balling ratio: 85.5%.
Embodiment three:
Step 1: be that the fly ash float of 0.18 ㎜ first puts into mixer by diameter, and add the water of fly ash float quality 5%, stir 5 minutes, stirring velocity 600r/min, then add flux in mixer, the mass ratio of fly ash float and flux is 70:30, stir 30 minutes, stirring velocity 600r/min, the powder fineness of described flux is 0.063 ㎜, be glass powder, Magnesium Borate Ore Powder and bentonitic mixture, and three's butt mass ratio is 75:20:5;
Step 2: the compound of step 1 gained is put into roller stove, is heated to 940 DEG C by roller furnace temperature, is incubated after 20 minutes, is cooled to normal temperature, the pellet calcined come out of the stove after through breaing up, cross 200 mesh sieves, obtain aglite.
The aggregate performance that the present embodiment obtains is: density: 0.36 gram/cc; Thermal conductivity: 0.114w/mk; Ultimate compression strength: 358MPa; Water-intake rate (% that vacuum filtration method measures): 32%; Balling ratio: 90.7%.
The present invention according to the difference of fly ash float composition, can allocate different proportionings, selects different calcining temperatures, the aglite of obtained different performance.
Claims (5)
1. a low cost thermoelectric factory fly ash float surface treatment method, is characterized in that, comprise the steps:
Step 1: be that the fly ash float of 0.18-0.25 ㎜ first puts into mixer by diameter, and add the water of fly ash float quality 5%, stir 5 minutes, stirring velocity 600r/min, add flux again in mixer, the mass ratio of fly ash float and flux is (70 ~ 80): (20 ~ 30), stirs 30 minutes, stirring velocity 600r/min;
Step 2: the compound of step 1 gained is put into roller stove, is heated to 850-950 DEG C by roller furnace temperature, is incubated after 20-30 minute, is cooled to normal temperature, the pellet calcined come out of the stove after through breaing up, cross 200 mesh sieves, obtain aglite.
2. a kind of low cost thermoelectric factory according to claim 1 fly ash float surface treatment method, it is characterized in that, the powder fineness of described flux is 0.063 ㎜, be glass powder, Magnesium Borate Ore Powder and bentonitic mixture, and three's butt mass ratio is 75:20:5.
3. a kind of low cost thermoelectric factory according to claim 1 fly ash float surface treatment method, is characterized in that, comprise the steps:
Step 1: be that the fly ash float of 0.25 ㎜ first adds mixer by diameter, and add the water of fly ash float quality 5%, stir 5 minutes, stirring velocity 600r/min, then add flux in mixer, the mass ratio of fly ash float and flux is 80:20, stir 30 minutes, stirring velocity 600r/min, the powder fineness of described flux is 0.063 ㎜, be glass powder, Magnesium Borate Ore Powder and bentonitic mixture, and three's butt mass ratio is 75:20:5;
Step 2: the compound of step 1 gained is put into roller stove, is heated to 900 DEG C by roller furnace temperature, is incubated after 30 minutes, is cooled to normal temperature, the pellet calcined come out of the stove after through breaing up, cross 200 mesh sieves, obtain aglite.
4. a kind of low cost thermoelectric factory according to claim 1 fly ash float surface treatment method, is characterized in that, comprise the steps:
Step 1: be that the fly ash float of 0.22 ㎜ first adds mixer by diameter, and add the water of fly ash float quality 5%, stir 5 minutes, stirring velocity 600r/min, then add flux in mixer, the mass ratio of fly ash float and flux is 75:25, stir 30 minutes, stirring velocity 600r/min, the powder fineness of described flux is 0.063 ㎜, be glass powder, Magnesium Borate Ore Powder and bentonitic mixture, and three's butt mass ratio is 75:20:5;
Step 2: the compound of step 1 gained is put into roller stove, is heated to 860 DEG C by roller furnace temperature, is incubated after 30 minutes, is cooled to normal temperature, the pellet calcined come out of the stove after through breaing up, cross 200 mesh sieves, obtain aglite.
5. a kind of low cost thermoelectric factory according to claim 1 fly ash float surface treatment method, is characterized in that, comprise the steps:
Step 1: be that the fly ash float of 0.18 ㎜ first adds mixer by diameter, and add the water of fly ash float quality 5%, stir 5 minutes, stirring velocity 600r/min, then add flux in mixer, the mass ratio of fly ash float and flux is 70:30, stir 30 minutes, stirring velocity 600r/min, the powder fineness of described flux is 0.063 ㎜, be glass powder, Magnesium Borate Ore Powder and bentonitic mixture, and three's butt mass ratio is 75:20:5;
Step 2: the compound of step 1 gained is put into roller stove, is heated to 940 DEG C by roller furnace temperature, is incubated after 20 minutes, is cooled to normal temperature, the pellet calcined come out of the stove after through breaing up, cross 200 mesh sieves, obtain aglite.
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101139179A (en) * | 2007-08-14 | 2008-03-12 | 陈云 | Ceramic coating burning colorful sand and method for making same |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101139179A (en) * | 2007-08-14 | 2008-03-12 | 陈云 | Ceramic coating burning colorful sand and method for making same |
Non-Patent Citations (4)
| Title |
|---|
| 李文丹 等: "TiO2包覆粉煤灰漂珠外墙隔热涂料的研究", 《化工新型材料》, vol. 35, no. 9, 30 September 2007 (2007-09-30), pages 69 * |
| 程俊华 等: "釉着色法生产彩砂的工艺技术", 《适用市场技术》, 31 July 1999 (1999-07-31), pages 11 - 12 * |
| 赵莹 等: "《垃圾能源化利用与管理》", 31 January 2013, article "用作生产彩色釉砂", pages: 101 * |
| 陈应钦编著: "《新型建筑材料的生产与应用》", 31 May 1993, article "彩砂的制备方法", pages: 65 * |
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Application publication date: 20150401 |