CN1202471A - Method for producing thermal insulation material with fluidized bed burned-coal fly ash - Google Patents
Method for producing thermal insulation material with fluidized bed burned-coal fly ash Download PDFInfo
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- CN1202471A CN1202471A CN 97108944 CN97108944A CN1202471A CN 1202471 A CN1202471 A CN 1202471A CN 97108944 CN97108944 CN 97108944 CN 97108944 A CN97108944 A CN 97108944A CN 1202471 A CN1202471 A CN 1202471A
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- thermal insulation
- insulation material
- fluidized bed
- fly ash
- coal fly
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Abstract
Flyash exhausted by fluidized bed is mixed with water in proper amount through stirring, and the mixture is formed and solidified at the condition of 50-90 deg.c temperature and 50-80% humidity to produce thermal insulation material. The present invention produce thermal insulation material through simple process and at relatively low temperature, power consumption and cost and this provides one new way for disposal and use of flyash of fluildized bed.
Description
The present invention relates to utilize the technology of fluidized-bed lime-ash system lagging material.
The ash discharge amount is greatly a big problem in fluidization field, and this has directly influenced the application of fluidized-bed aspect solid fuel ignition.Mainly contain about the cindery technology of utilizing of fluidized bed burned-coal: (1), directly as roadbed material or ground-improving material; (2), in the fluidized bed burned-coal lime-ash, add cement, calcium lime powder and aluminium powder, under 180 ℃, make lightweight concrete material after the hybrid shaping.The former is the general method of utilizing, and it is with low content of technology, but because cost is low, technology is simple, the existing main flow of still handling for the fluidized-bed lime-ash.The latter then is by certain technique means, and lime-ash is made high value-added product, but need to add several other materials in its manufacturing processed, and temperature of reaction is 180 ℃, needs to consume certain energy, and cost is higher.
The objective of the invention is to propose a kind of clay and hardening characteristics that utilizes materials such as containing silicon-dioxide, calcium oxide, calcium sulfate in the fluidized bed burned-coal fly ash, by method simple and easy, that low energy consumption technologies is made thermal insulation material with fluidized bed burned-coal fly ash, with a large amount of lime-ash of handling and utilizing the fluidized bed burned-coal process to produce.
The object of the present invention is achieved like this, and the flying dust that adopts fluidized-bed top to discharge is a raw material, and so-called flying dust is that the cyclonic separator of fluidized bed burned-coal process on fluidized-bed discharged the lime-ash that collect the back, also claims to fly upward ash.Adding water by the ratio of water-solid ratio 0.6～1,4 in flying dust, through mixing, stirring postforming, is 50 ℃～90 ℃ in temperature then, and humidity is to be cured reaction under 50%～80% the condition, promptly makes required lagging material.
The optimum temps of curing reaction is 75 ℃～85 ℃ in the above-mentioned thermal insulation material with fluidized bed burned-coal fly ash method for making.
The made heat insulation material surface of the present invention is vesicular, the inner reticulated microstructure that forms, has heat retaining property preferably, preparation process is simple, adopt lower solidification value, produce the lagging material that has than high additive value with lower energy consumption and cost, particularly a large amount of lime-ash of discharging with the fluidized bed burned-coal process are raw material, for handling and utilizing the lime-ash problem of fluidized-bed that a new way is provided.
Embodiment one
The flying dust of discharging with fluidized-bed top is a raw material, in the flying dust solid material, add moisture by water-solid ratio 1.0, after mixing, stirring, in mould, be shaped, put into then have temperature controllable, device that control is wet is cured the reaction certain hour and promptly makes lagging material, the curing reaction condition is 80 ℃ of temperature, humidity 50%, 24 hours reaction times.Made material has following performance: density is 1127kg/m
3, thermal conductivity is 0.09W/m.K, and flexural strength is 0.60MPa, and compressive strength is 3.20MPa.
Embodiment two
Adding moisture by water-solid ratio 1.0 in the flying dust solid material, be shaped in mould after mixing, stirring, is 80 ℃ in temperature then, and humidity is to be cured reaction under 80% the condition, and the reaction times is 48 hours.Made lagging material has following performance: density is 1077kg/m
3, thermal conductivity is 0.11W/m.K, and flexural strength is 1.20MPa, and compressive strength is 2.00MPa.
Embodiment three
Adding moisture by water-solid ratio 0.6 in the flying dust solid material, be shaped in mould after mixing, stirring, is 80 ℃ in temperature then, and humidity is to be cured reaction under 50% the condition, and the reaction times is 48 hours.Made lagging material has following performance: density is 1280kg/m
3, thermal conductivity is 0.082W/m.K, flexural strength is 1.20MPa, compressive strength 2.90MPa.
Embodiment four
Adding moisture by water-solid ratio 1.0 in the flying dust solid material, be shaped in mould after mixing, stirring, is 60 ℃ in temperature then, and humidity is to be cured reaction under 50% the condition, and the reaction times is 24 hours.Made lagging material has following performance: density is 837kg/m
3, thermal conductivity is 0.065W/m.K, and flexural strength is 0.45Mpa, and compressive strength is 1.65MPa.
Claims (2)
1, a kind of method for making of thermal insulation material with fluidized bed burned-coal fly ash, it is characterized in that the flying dust of discharging with fluidized-bed top is a raw material, ratio in water-solid ratio 0.6～1.4 in flying dust adds water, through mixing, stir postforming, be 50 ℃～90 ℃ in temperature then, humidity is to be cured reaction under 50%～80% the condition.
2, by the method for making of the described thermal insulation material with fluidized bed burned-coal fly ash of claim 1, the optimum temps that it is characterized in that curing reaction is 75 ℃～85 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97108944 CN1202471A (en) | 1997-06-12 | 1997-06-12 | Method for producing thermal insulation material with fluidized bed burned-coal fly ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97108944 CN1202471A (en) | 1997-06-12 | 1997-06-12 | Method for producing thermal insulation material with fluidized bed burned-coal fly ash |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1202471A true CN1202471A (en) | 1998-12-23 |
Family
ID=5170776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97108944 Pending CN1202471A (en) | 1997-06-12 | 1997-06-12 | Method for producing thermal insulation material with fluidized bed burned-coal fly ash |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1202471A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101792277A (en) * | 2010-03-15 | 2010-08-04 | 北京建筑工程学院 | Mineral admixture for concrete and use method thereof |
-
1997
- 1997-06-12 CN CN 97108944 patent/CN1202471A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101792277A (en) * | 2010-03-15 | 2010-08-04 | 北京建筑工程学院 | Mineral admixture for concrete and use method thereof |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |