CN103642295B - A kind of method preparing filleting gypsum putty powder from desulfurized gesso of flue gas - Google Patents
A kind of method preparing filleting gypsum putty powder from desulfurized gesso of flue gas Download PDFInfo
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- CN103642295B CN103642295B CN201310611406.9A CN201310611406A CN103642295B CN 103642295 B CN103642295 B CN 103642295B CN 201310611406 A CN201310611406 A CN 201310611406A CN 103642295 B CN103642295 B CN 103642295B
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Abstract
A kind of method preparing filleting gypsum putty powder from desulfurized gesso of flue gas。First garbage desulfurated plaster is crushed to granularity 25-35 μm and reaches more than 80%, then carry out high-temperature calcination, make CaSO4·2H2O loses water of crystallization and becomes CaSO4·1/2H2O or CaSO4；According to percentage by weight by regulator 0.5-3% reinforcing agent 0.5-1.5%, water-retaining agent 0.1-0.6%, retarder 0.3-0.5%, photocatalyst 0.2-0.5%, binding agent 0.2-0.25%, once it is uniformly mixed；According to percentage by weight, desulfurization gypsum powder 80-87%, the calcium-magnesium powder 10-20% after process is added in the mixture obtained, carry out secondary stirring mixing, namely obtain filleting gypsum putty powder。The product of preparation has environmental protection, cracking resistance, easy-to-use, cheap, prior have the feature such as degradation of formaldehyde and other volatile organic matters。
Description
Technical field
The present invention relates to a kind of method preparing filleting gypsum putty powder from desulfurized gesso of flue gas, belong to construction material preparing technical field。
Background technology
Desulfurated plaster is the one of industry byproduct Gypsum Fibrosum, is the side-product of power-plant flue gas wet desulphurization, and its composition is essentially identical with the natural gypsum, and purity and fineness are higher。At present, the discharge capacity of China's desulfurated plaster is close to 100,000,000 tons/year, with being then precious, abandons then for suffering from。
At present, China's desulfurated plaster utilization rate is only 30%, and a large amount of desulfurated plasters are stacked or fill out sea, takies a large amount of soil and soil is brought secondary pollution。The recycling of such garbage is paid much attention to by developed country, and Japan's desulfurated plaster utilization rate is close to 100%；The almost all of desulfurated plaster of Germany is all used for preparing building materials of gypsum, and utilization rate is about 90%；U.S.'s desulfurated plaster comprehensive utilization ratio is also reached for more than 75%。Therefore, the recycling of desulfurated plaster is the major issue in resource and environment field。
Filleting gypsum putty powder is to adopt high-quality Gypsum Fibrosum powder, a kind of wall surfacing material that high-quality adhesive and organic additive etc. are composited。Product is used for concrete, wooden boards, plasterboard, inner wall surface, ceiling, negative and positive angle, Thistle board etc. filleting, repairing and leveling。Because what do not have gypsum putty makes consumption big, once once not paid attention to, some employing Gypsum Fibrosum powders add after glue stirs and directly use, and occur that intensity is low and the quality problems such as easy be full of cracks。
Traditional filleting gypsum putty powder is employing desulfurated plaster is primary raw material, directly adds water and prepares, product bad adhesion, it is easy to come off be full of cracks；Also the employing Gypsum Fibrosum having adds adhesive to be added cellulose again and prepares, and in performance, some improves, but result of use is very poor；Also employing water-retaining agent, binding agent and the methyl cellulose ethers having, although the auxiliary agent of addition is less than five kinds, but cost is higher, and owing to the source of desulfurated plaster is not as natural gypsum stable in properties in performance, cause the less reliable of product。
Summary of the invention
For overcoming drawbacks described above, the invention discloses a kind of method preparing filleting gypsum putty powder from desulfurized gesso of flue gas。Filleting Gypsum Fibrosum prepared by the inventive method has stronger cohesive force and is not easily cracked, and preparation method is simple, and easy to use, environmental protection can effectively remove the features such as formaldehyde, benzene class, TVOC and sterilization。
The technical scheme is that and be achieved in that:
1) garbage desulfurated plaster is crushed to 25-35 μm and reaches more than 80%, then carry out high-temperature calcination, make CaSO4·2H2O loses water of crystallization and becomes CaSO4 1/2H2O or CaSO4, obtain desulfurization gypsum powder；
2) according to percentage by weight by regulator 0.5-3% reinforcing agent 0.5-1.5%, water-retaining agent 0.1-0.6%, retarder 0.3-0.5%, photocatalyst 0.2-0.5%, binding agent 0.2-0.25%, once it is uniformly mixed；
3) according to percentage by weight, desulfurization gypsum powder 80-87%, calcium-magnesium powder 10-20% are added in the mixture that step (B) obtains, carry out secondary stirring mixing, obtain filleting gypsum putty powder。
Described regulator is sulfonate salt flame。
Described reinforcing agent is Borax。
Described water-retaining agent is hydroxyethyl cellulose。
Described retarder is polyamide。
Described adhesive is polyvinyl alcohol。
Described photocatalyst is nano photo-catalytic formaldehyde remover, is adopt less than 50 nanometers by TiO2Load ceramic crystal processes。
Present invention process adds auxiliary agent kind and optimizes product proportioning, with the addition of free of contamination nano photocatalyst catalytic material, can can pollutant and the poisonous and harmful organic compound such as degradation of formaldehyde, benzene,toluene,xylene, ammonia, TVOC when visible light or in the inadequate situation of light, the product prepared has antibacterial and deodorizing, mildew-resistant, the air cleaning performance such as antifouling, can be permanently effective be solidified on substrate surface, give full play to its decomposability and air cleaning performance。In course of reaction, photocatalyst itself will not change and loss, under the irradiation of light can continual purifying contaminated thing, have the time persistently, the advantage of continuous action。
Wherein, the nano photo-catalytic formaldehyde remover adopted is invented by less than 50 nanometers by TiO2Load ceramic crystal processes。This products characteristics is:
1) pollution-free: formaldehyde complete oxidation is decomposed into water and carbon dioxide, it is absent from adsorbing the problems such as saturated。
2) degradation rate is high: under room temperature state, the conversion ratio of its PARA FORMALDEHYDE PRILLS(91,95) is more than 95%, does not produce secondary pollution。
3) durability: the photocatalyst of addition will not change and loss, it is possible to continual decomposing pollutant itself。
The features such as this product has environmental protection, firm time extends, cohesive force is strong, resistance to water is good, intensity is high, not easy to crack。
Filleting Gypsum Fibrosum prepared by the inventive method has stronger cohesive force and is not easily cracked, and preparation method is simple, easy to use, environmental protection, and firm time extends, resistance to water is good, intensity is high can effectively remove the features such as formaldehyde, benzene class, TVOC and sterilization。
Accompanying drawing explanation
Fig. 1 is for prepare filleting gypsum putty powder process chart from desulfurized gesso of flue gas。
Embodiment
The following is the relevant explanation to the embodiment of the present invention, but the present embodiment cannot be used for the restriction present invention, the similarity method of every employing present invention and similar change thereof, all should list protection scope of the present invention in。
Regulator-sulfonate salt flame that the embodiment of the present invention uses；Reinforcing agent-Borax；Water-retaining agent-hydroxyethyl cellulose；Retarder-polyamide；Adhesive-polyvinyl alcohol；Photocatalyst-nano photo-catalytic formaldehyde remover。
Filleting gypsum putty powder technological process is prepared as shown in Figure 1 from desulfurized gesso of flue gas。
[embodiment 1]
The preparation technology of the present embodiment is as follows:
1) proportioning raw materials: be 1.0% reinforcing agent according to percentage by weight regulator be 0.5%, water-retaining agent is 0.2%, retarder is 0.3%, photocatalyst is 0.2%, and binding agent 0.2%, desulfurated plaster 87%, other are calcium-magnesium powder about 10%。
2) prepared by auxiliary agent: regulator, reinforcing agent, water-retaining agent, retarder, photocatalyst, and binding agent mixes according to weight proportion, then raw material mixed above is sent into blender, carries out once stirring mix homogeneously。
3) finished product synthesis: add desulfurization gypsum powder 87%, calcium-magnesium powder 10% to step 2 according to percentage by weight) in the mixture that obtains, carry out secondary stirring mixing, be sufficiently mixed by twice, obtain filleting gypsum putty powder finished product, it is possible to directly use。
According to the filleting Gypsum Fibrosum powder that the present embodiment is prepared, except meeting People's Republic of China's building material industry standard (JC/T2075-2011)。Specific targets are: presetting period 50-70min；Final setting time 60-90min；Water retention >=90%, tensile strength >=0.60MPa, comprcssive strength >=3.0MPa。
[embodiment 2]
The preparation technology of the present embodiment is as follows:
1) proportioning raw materials: be 2.0% according to percentage by weight regulator, reinforcing agent is 1.0%, and water-retaining agent is 0.4%, retarder is 0.4%, photocatalyst 0.2%, and binding agent 0.25%, desulfurated plaster 80%, calcium-magnesium powder is 15%。
2) prepared by auxiliary agent: regulator, reinforcing agent, water-retaining agent, retarder, photocatalyst, and binding agent mixes according to weight proportion, then raw material mixed above is sent into blender, once stirs, be sufficiently stirred for mixing；
3) finished product synthesis: add desulfurization gypsum powder 80%, calcium-magnesium powder 15% to step 2 according to percentage by weight) in the mixture that obtains, carry out secondary stirring mixing, be sufficiently mixed by twice, obtain filleting gypsum putty powder finished product, it is possible to directly use。
According to the filleting Gypsum Fibrosum that the present embodiment is prepared, except meeting People's Republic of China's building material industry standard (JC/T2075-2011)。Specific targets are: presetting period 50-70min；Final setting time 60-90min；Water retention >=90%, tensile strength >=0.60MPa, comprcssive strength >=3.5MPa。
[embodiment 3]
1) proportioning raw materials: be 3.0% reinforcing agent according to percentage by weight regulator be 1.5%, water-retaining agent is 0.6%, retarder is 0.5%, photocatalyst is 0.2%, binding agent 0.2%, desulfurated plaster 85%, calcium-magnesium powder 10%。
2) prepared by auxiliary agent: regulator, reinforcing agent, water-retaining agent, retarder, photocatalyst, and binding agent mixes according to weight proportion, then raw material mixed above is sent into blender, carries out once stirring mix homogeneously。
3) finished product synthesis: add desulfurization gypsum powder 85%, calcium-magnesium powder 10% to step 2 according to percentage by weight) in the mixture that obtains, carry out secondary stirring mixing, be sufficiently mixed by twice, obtain filleting gypsum putty powder finished product, it is possible to directly use。
According to the filleting Gypsum Fibrosum powder that the present embodiment is prepared, except meeting People's Republic of China's building material industry standard (JC/T2075-2011)。Specific targets are: presetting period 50-70min；Final setting time 60-90min；Water retention >=90%, tensile strength >=0.60MPa, comprcssive strength >=3.0MPa。
Claims (3)
1. the method preparing filleting gypsum putty powder from desulfurized gesso of flue gas, is with the desulfurized gesso of flue gas anhydrous or semi-hydrated gypsum after calcined dehydration for primary raw material, adds auxiliary agent and prepares filleting gypsum putty powder as construction material；It is characterized in that:
1) garbage desulfurated plaster is crushed to 25-35 μm and reaches more than 80%, then carry out high-temperature calcination, make CaSO4·2H2O loses water of crystallization and becomes CaSO4·1/2H2O or CaSO4, obtain desulfurization gypsum powder；
2) according to percentage by weight by regulator 0.5-3%, reinforcing agent 0.5-1.5%, water-retaining agent 0.1-0.6%, retarder 0.3-0.5%, photocatalyst 0.2-0.5%, binding agent 0.2-0.25%, once it is uniformly mixed, described reinforcing agent is Borax, described retarder is polyamide, and described photocatalyst is nano photo-catalytic formaldehyde remover, is adopt less than 50 nanometers by TiO2Load ceramic crystal processes；
3) desulfurization gypsum powder 80-87%, calcium-magnesium powder 10-20% are added to step 2 according to percentage by weight) in the mixture that obtains, carry out secondary stirring mixing, obtain filleting gypsum putty powder。
2. a kind of method preparing filleting gypsum putty powder from desulfurized gesso of flue gas according to claim 1, it is characterised in that: described regulator is sulfonate salt flame。
3. a kind of method preparing filleting gypsum putty powder from desulfurized gesso of flue gas according to claim 1, it is characterised in that: described water-retaining agent is hydroxyethyl cellulose。
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| CN201310611406.9A CN103642295B (en) | 2013-11-26 | 2013-11-26 | A kind of method preparing filleting gypsum putty powder from desulfurized gesso of flue gas |
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| CN104846440B (en) * | 2015-05-29 | 2017-11-24 | 昆明冶金研究院 | A kind of method that metallurgical gas desulfuration gypsum recrystallization method prepares high-purity Dihydrate gypsum whiskers |
| CN107434391A (en) * | 2016-05-25 | 2017-12-05 | 北新集团建材股份有限公司 | A kind of water-fast bonding gypsum powder and preparation method thereof |
| CN111606670A (en) * | 2019-06-20 | 2020-09-01 | 中建材创新科技研究院有限公司 | Caulking gypsum capable of purifying air and preparation method thereof |
| CN114276101A (en) * | 2021-10-28 | 2022-04-05 | 安徽拓远环保科技有限公司 | Preparation method of anhydrite-based light plastering gypsum with strong bonding force |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4002590A (en) * | 1973-11-27 | 1977-01-11 | Kikusui Kagaku Kogyo Kabushiki Kaisha | Coating composition for thick coating |
| CN101747012A (en) * | 2008-12-18 | 2010-06-23 | 北新集团建材股份有限公司 | Caulking desulphurization gypsum |
| CN102344721A (en) * | 2010-08-04 | 2012-02-08 | 北新集团建材股份有限公司 | Paint composition and preparation method thereof |
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- 2013-11-26 CN CN201310611406.9A patent/CN103642295B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4002590A (en) * | 1973-11-27 | 1977-01-11 | Kikusui Kagaku Kogyo Kabushiki Kaisha | Coating composition for thick coating |
| CN101747012A (en) * | 2008-12-18 | 2010-06-23 | 北新集团建材股份有限公司 | Caulking desulphurization gypsum |
| CN102344721A (en) * | 2010-08-04 | 2012-02-08 | 北新集团建材股份有限公司 | Paint composition and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 烟气脱硫石膏嵌缝腻子的研制;周建中等;《新型建筑材料》;20100131;第16-19页 * |
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Effective date of registration: 20210817 Address after: 313009 No. 666, Chaoyang Road, Nanxun District, Huzhou City, Zhejiang Province Patentee after: Zhejiang gudeyou Technology Co.,Ltd. Address before: 201209 No. 2360 Golden Sea Road, Shanghai, Pudong New Area Patentee before: SHANGHAI SECOND POLYTECHNIC University |