CN109776050A - A method of using coal ash for manufacturing for phase transformation porous material - Google Patents
A method of using coal ash for manufacturing for phase transformation porous material Download PDFInfo
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- CN109776050A CN109776050A CN201910146214.2A CN201910146214A CN109776050A CN 109776050 A CN109776050 A CN 109776050A CN 201910146214 A CN201910146214 A CN 201910146214A CN 109776050 A CN109776050 A CN 109776050A
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- flyash
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- phase transformation
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Abstract
The invention belongs to industrial solid castoff technical field of comprehensive utilization, are related to a kind of new method using coal ash for manufacturing for phase transformation porous material.For current flyash due to cycling and reutilization technical problem, and largely stack the disadvantages of causing environmental pollution, the present invention makes full use of the characteristics of flyash own chemical composition, by replacing part of cement using flyash, in conjunction with foaming agent and phase-change material, the porous material of a kind of high energy storage and high heat preservation is obtained with the method for chemical blowing.Present invention process process is short, and equipment is simple, can make full use of itself chemical composition of flyash, obtained good product performance, at low cost, and non-environmental-pollution.
Description
Technical field
The invention belongs to industrial solid castoff field of comprehensive utilization, be related to it is a kind of using coal ash for manufacturing for the porous material of phase transformation
The method of material.
Background technique
With being constantly progressive for science and technology, the demand of the energy is continued to increase, is caused at the same time largely discarded
The discharge of object causes serious problem of environmental pollution.
Flyash (Fly Ash, flying dust) is the fine ash being discharged by coal fired boiler of power plant with flue gas, is that thermal power plant is discharged
Discarded object of power boiler discharge.In recent years, coal resources in China consumption constantly increases, and the discharge amount of flyash sharply increases year by year.According to
" Chinese Resources comprehensively utilize annual report 2014 " statistics, nineteen ninety-five, China's flyash annual output is about 1.3 hundred million tons, 2013
It is 5.8 hundred million tons, is 4.6 times of nineteen ninety-five.The year two thousand twenty is expected accordingly, and total heap of flyash high-volume will be more than 3,000,000,000 tons.China
It is that world's flyash generates most countries, annual emissions are equivalent to 2 times [6] of China's domestic waste total release.Powder
A large amount of discharges of coal ash cause serious environmental pollution and harm.The pollution for how reducing flyash, flyash is turned waste into wealth,
Promote the efficient circulation of flyash to utilize, is merit attention the problem of.Flyash is a kind of with volcano ash effect, form
Effect and micro aggregate effect, this three big effect allow it to be widely used for construction material.The comprehensive utilization of flyash in 2013
Amount is 4.0 hundred million tons, comprehensive utilization ratio 69%.
Phase-change material (PCM-Phase Change Material), which refers to, to be varied with temperature and changes state of matter and can mention
For the substance of latent heat.The process of transformation physical property is known as phase transition process, and at this moment phase-change material will absorb or release is a large amount of latent
Heat.Energy storage materials of phase change has the ability of storage heat, and phase-change material is melted when temperature is higher than phase transition temperature, absorbs in environment
Sensible heat is changed into latent heat and stores, to reduce indoor heat gain, when temperature is lower than phase transition temperature, phase-change material is by latent heat
Being changed into sensible heat can be discharged into environment, therefore phase-change material is able to achieve proper storage and the release of energy, reduce building heating or
Air-conditioning uses the time, reduces the expense generated when air-conditioning and heating system use, operation, can greatly save energy consumption.
Porous material is the material for the network structure being made of gas-particle two-phase.Since its exclusive design feature makes it have
The characteristics of low-density, low thermally conductive and high-specific surface area, so porous material is with a wide range of applications, as porous material is available
Insulate, buffer, absorbing the material of impact energy, to play its unique comprehensive performance determined by porous structure.Water
Mud foamed porous material is since it has the characteristics that non-ignitable, light, thermal coefficient is small, before building field has preferable application
Scape.Using flyash pozzolanic properties, cost can greatly be reduced by preparing the porous material instead of part of cement, avoid money
Source waste, while solve largely stacked as flyash caused by problem of environmental pollution；In addition, phase-change material is added to this
The phase transformation porous material prepared in porous material also has very high latent heat calorific value, can effectively improve it and inhales exothermic character, mentions
Its further utility value.Therefore, directly prepared using flyash high-performance high additive value phase transformation porous material become to
It closes important.
Summary of the invention
Defect in view of the prior art, it is an object of that present invention to provide a kind of new sides for comprehensively utilizing Industrial Solid Waste flyash
Method prepares phase transformation porous material using the direct low-temp foaming of the mixture of flyash, phase-change material and cement.
A method of using coal ash for manufacturing for phase transformation porous material, it is characterised in that: flyash is made full use of to have by oneself
The characteristics of chemical composition, (mainly forms SiO2, Al2O3, CaO), by the way that there are pozzolanic properties using flyash, it is replaced into portion
Divide cement, and add partial phase change material, base stock is constituted after mixing, it is abundant that foaming agent, exciting agent and suitable water is added
After mixing, high performance phase transformation porous material, base stock composition proportion are as follows: fine coal are obtained using the method that cryochemistry foams
Ash 30%~50%, cement are 30%~50%, and phase-change material is 10%~40%.
Further, flyash used is the waste residue of coal washing production line discharge, main component SiO2: 41.97wt%,
Al2O3: 39.9wt%, CaO:6.41wt%, MgO:0.6wt%, K2O:0.50%, Na2O:0.20%.
Further, cement used is ordinary portland cement, main component CaO:42.2wt%, SiO2:
25.94wt%, Al2O3: 10.46wt%, MgO:8.42wt%, Fe2O3:1.71wt%, S:1.18wt%.
Further, preparing required phase-change material is butyl stearate and capric acid.Wherein, phase-change material accounts for base stock
's；And 10%~80% and the capric acid that butyl stearate accounts for phase-change material account for the 20%~90% of phase-change material.
Further, water used is ordinary tap water, and dosage is the 20%~40% of base stock.
Further, it is 30wt% hydrogen peroxide solution and concentration is that foaming agent used and exciting agent, which are respectively concentration,
1wt% liquor potassic permanganate, dosage are respectively the 2%~7% and 1%~8% of base stock.
Phase transformation porous material of the present invention, density range is wide, and apparent density can control in 300~1600kg/m3,
Thermal coefficient can control 0.100~0.350, and material latent heat calorific value can control in 30~120J/g.The porous material of the phase transformation
The thermal coefficient and latent heat performance of material change with the variation of apparent density and phase-change material content, not according to the performance of material
Together, it can be used for building energy conservation wall and thermal insulation material etc., there is very wide application range.
The present invention has comprehensively considered the characteristics of chemical composition of flyash itself, it will be made full use of with pozzolanic reaction
The advantages of, by the way that cement is added, phase-change material constitutes base stock, substantially former with comparing by the composition for adjusting a base stock
Material is debugged；The proportion content of base stock and water, foaming agent is controlled, each link of strict control preparation process makes to send out
Bubble speed matches with base stock firm time, to prepare aperture less than 2mm, the uniform low-density of bubble distribution, height
The phase transformation porous material of intensity, Gao Qianre.Present invention process process is short, and equipment is simple, easy to operate, can make full use of Industrial Solid Waste
Flyash, and obtained products application range is wide, added value is high, and has protective effect to environment.
Detailed description of the invention
Fig. 1 is flow chart of the coal ash for manufacturing for phase transformation porous material.
Fig. 2 is the butyl stearate and capric acid compounding gained cooling curve of different quality ratio.
Fig. 3 is the exterior appearance figure of phase transformation porous material sample.
Specific embodiment
Embodiment 1
With 30% flyash (main component SiO2: 41.97wt%, Al2O3: 39.9wt%, CaO:6.41wt%, MgO:
0.6wt%, K2O:0.50%, Na2O:0.20%), 50% ordinary portland cement (main component CaO:42.2wt%,
SiO2: 25.94wt%, Al2O3: 10.46wt%, MgO:8.42wt%, Fe2O3: 1.71wt%, S:1.18wt%) and 20% phase
Become material (consisting of 30% butyl stearate and 70% capric acid) as base stock, it is basic that quality is added after being sufficiently mixed
30% water of material quality carries out cement slurry and is mixed with, and finally adds 3% hydrogen peroxide and 4% of base stock quality respectively
Liquor potassic permanganate as foaming agent, pour into mold after mixing evenly, final desired sample obtained after maintenance.
Embodiment 2
With 40% flyash (main component SiO2: 41.97wt%, Al2O3: 39.9wt%, CaO:6.41wt%, MgO:
0.6wt%, K2O:0.50%, Na2O:0.20%), 40% ordinary portland cement (main component CaO:42.2wt%,
SiO2: 25.94wt%, Al2O3: 10.46wt%, MgO:8.42wt%, Fe2O3: 1.71wt%, S:1.18wt%) and 20% phase
Become material (consisting of 50% butyl stearate and 50% capric acid) as base stock, it is basic that quality is added after being sufficiently mixed
30% water of material quality carries out cement slurry and is mixed with, and finally adds 2% hydrogen peroxide and 3% of base stock quality respectively
Liquor potassic permanganate as foaming agent, pour into mold after mixing evenly, final desired sample obtained after maintenance.
Embodiment 3
With 45% flyash (main component SiO2: 41.97wt%, Al2O3: 39.9wt%, CaO:6.41wt%, MgO:
0.6wt%, K2O:0.50%, Na2O:0.20%), 40% ordinary portland cement (main component CaO:42.2wt%,
SiO2: 25.94wt%, Al2O3: 10.46wt%, MgO:8.42wt%, Fe2O3: 1.71wt%, S:1.18wt%) and 10% phase
Become material (consisting of 70% butyl stearate and 30% capric acid) as base stock, it is basic that quality is added after being sufficiently mixed
30% water of material quality carries out cement slurry and is mixed with, and finally adds 3% hydrogen peroxide and 2% of base stock quality respectively
Liquor potassic permanganate as foaming agent, pour into mold after mixing evenly, final desired sample obtained after maintenance.
Claims (6)
1. it is a kind of using coal ash for manufacturing for the method for phase transformation porous material, it is characterised in that: make full use of the change that flyash is own
It is replaced part of cement, and add partial phase change material by having pozzolanic properties using flyash by the characteristics of learning composition
Material is constituted base stock and is foamed after addition foaming agent, exciting agent and suitable water are sufficiently mixed using cryochemistry after mixing
Method obtain high performance phase transformation porous material, base stock composition proportion are as follows: flyash 30%~50%, cement 30%
~50%, phase-change material is 10%~40%.
2. as described in claim 1 using coal ash for manufacturing for the method for phase transformation porous material, it is characterised in that: flyash used
For the waste residue of coal washing production line discharge, main component SiO2: 41.97wt%, Al2O3: 39.9wt%, CaO:6.41wt%,
MgO:0.6wt%, K2O:0.50%, Na2O:0.20%, content account for the 30%~50% of base stock.
3. as described in claim 1 using coal ash for manufacturing for the new method of phase transformation porous material, it is characterised in that: cement used
For ordinary portland cement, it is CaO:42.2wt%, SiO that group, which wants ingredient,2: 25.94wt%, Al2O3: 10.46wt%, MgO:
8.42wt%, Fe2O3: 1.71wt%, S:1.18wt%.
4. as described in claim 1 using coal ash for manufacturing for the method for phase transformation porous material, it is characterised in that: prepare required
Phase-change material is butyl stearate and capric acid；Wherein butyl stearate accounts for the 10%~80% of phase-change material, and capric acid accounts for phase transformation material
The 20%~90% of material.
5. as described in claim 1 using coal ash for manufacturing for the method for phase transformation porous material, it is characterised in that: water used is general
Logical tap water.
6. as described in claim 1 using coal ash for manufacturing for the method for phase transformation porous material, it is characterised in that: foaming used
It is 30wt% hydrogen peroxide solution and concentration is 1wt% liquor potassic permanganate that agent and exciting agent, which are respectively concentration, and dosage is respectively
The 2%~7% of base stock and 1%~8%.
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| CN201910146214.2A CN109776050A (en) | 2019-02-27 | 2019-02-27 | A method of using coal ash for manufacturing for phase transformation porous material |
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| CN201910146214.2A CN109776050A (en) | 2019-02-27 | 2019-02-27 | A method of using coal ash for manufacturing for phase transformation porous material |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103922787A (en) * | 2014-03-18 | 2014-07-16 | 北京大学 | Method for preparing porous material by using titanium-containing blast furnace slag, and titanium-containing porous material |
| CN104803701A (en) * | 2015-02-17 | 2015-07-29 | 天津新滨工程技术检测有限公司 | Composite phase-change insulation board and preparation method |
| CN107129205A (en) * | 2017-05-15 | 2017-09-05 | 浙江海洋大学 | A kind of materials for wall and preparation method thereof |
-
2019
- 2019-02-27 CN CN201910146214.2A patent/CN109776050A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103922787A (en) * | 2014-03-18 | 2014-07-16 | 北京大学 | Method for preparing porous material by using titanium-containing blast furnace slag, and titanium-containing porous material |
| CN104803701A (en) * | 2015-02-17 | 2015-07-29 | 天津新滨工程技术检测有限公司 | Composite phase-change insulation board and preparation method |
| CN107129205A (en) * | 2017-05-15 | 2017-09-05 | 浙江海洋大学 | A kind of materials for wall and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 吴小缓: "《工业固废处理与利用技术研究及应用新进展》", 31 July 2017, 中国建材工业出版社 * |
| 张蕾: "《固体废弃物处理与资源化利用》", 31 December 2017, 中国矿业大学出版社 * |
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