CN102190476A - Water-tolerant desulfured dihydrate stuccogypsum for bottom layer and production method thereof - Google Patents
Water-tolerant desulfured dihydrate stuccogypsum for bottom layer and production method thereof Download PDFInfo
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- CN102190476A CN102190476A CN2010101229170A CN201010122917A CN102190476A CN 102190476 A CN102190476 A CN 102190476A CN 2010101229170 A CN2010101229170 A CN 2010101229170A CN 201010122917 A CN201010122917 A CN 201010122917A CN 102190476 A CN102190476 A CN 102190476A
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- CN
- China
- Prior art keywords
- water
- gypsum
- agent
- bottom layer
- desulfured
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
- C04B28/142—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/144—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/026—Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/10—Accelerators; Activators
- C04B2103/14—Hardening accelerators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention provides water-tolerant desulfured dihydrate stucco gypsum for a bottom layer and a production method thereof. The gypsum is a solid waste material which is generated by a thermal power plant, belonging to the technical fields of developing recycling economy, turning waste to wealth and achieving comprehensive resource utilization. The gypsum comprises the following components by weight percent: 65-75% of raw desulfured dihydrate gypsum, 20-25% of activated material, 5-15% of excitant, 0.5-2% of coagulant, 5-15% of early strength agent, 0.01-0.15% of water-retaining agent, 0.1-0.2% of binder and 40-60% of fine aggregate. The preparation method comprises the following steps: mixing oven-dried or air-dried desulfured dihydrate gypsum with the activated agent, the coagulant and the excitation material to obtain dried powder; and mixing 40-60% of the dried powder with the water-retaining agent and the like in a proportion. The gypsum has the advantages of high strength, good water tolerance, low cost and long operable time. A large amount of desulfured gypsum can be consumed, and secondary investment, secondary energy consumption and secondary pollution are reduced; and economic benefits, social benefits, ecological benefits and environment-friendly benefits are substantial.
Description
Technical field
The invention belongs to industrial solid castoff, the comprehensive utilization of resources technical field.Be specifically related to a kind of,---solid waste that the gypsum wet desulfurization is produced---desulfurated plaster with the firepower electrical plant Wingdale, remove traditional technologys such as drying, calcining, grinding from, excitation principle with active material and excitation material, carry out modification, and add necessary admixture, produce the water-fast bottom layer brushing gypsum of two water desulfurization.
Background technology
China is thermal power generation big country, and 2,500 ten thousand tons of the quantity dischargeds of annual SO2 are the first in the world.In order to reduce atmospheric pollution, country has taked mandatory desulfurization measure.2010, the quantity discharged of desulfurated plaster was roughly at 5,000 ten thousand tons.And present utilization ratio is less than 10%, and situation is very severe.Desulfurated plaster generally takes to abandon method, promptly land purchase stack, landfill, both increased the burden of enterprise's land purchase, cause again by to topsoil, in the face of water source, soil, people and animals' secondary pollution with transferring to.
Under the brute force of national recycling economy, the Scientific Outlook on Development and development low-carbon economy policy promotes, in order to address this problem, domestic many gypsum enterprise, comprise equipment manufacture industry, production and processing industries, follow traditional complete processing one after another, drop into ten million element device expense, carry out drying, calcining, grinding, display, become to produce the β semi-hydrated gypsum.Then, by coating processing enterprise, produce bottom layer brushing gypsum again.The problem of bringing one is: equipment, factory building have high input, and complex process; The 2nd: cause secondary energy consumption, secondary pollution; The 3rd: product strength is low, poor water resistance, operable time short, and range of application is narrow; The 4th: cost height, quality instability.
At present, in inspection information, find no similar application for a patent for invention.
Summary of the invention
Purpose of the present invention is to provide water-fast surface layer brushing gypsum of a kind of two water desulfurization and production method thereof.
The advantage of this technology is: anti-folding, ultimate compression strength height, water-tolerant, coefficient of softening is good, operable time is long, does not add retardant, and cost is low, and single stage method is processed and put in place, and the desulfurated plaster amount of dissolving is big.
A kind of water-fast bottom layer brushing gypsum of two water desulfurization provided by the invention and production method thereof are made up of following share, weight: original state two water desulfurated plaster 65-75.0%, pozzolanic activity mineral material: 20-25%, exciting agent material 5-15%, setting accelerator 0.5-2.0%.Get 40-60% after mixing stirring, again with hardening accelerator: 5-15%, water-holding agent: 0.01-0.10%, binding agent 0.1-0.2%, fine aggregate: 40-60% mixes together.
The water-fast bottom layer brushing gypsum of above-mentioned two water desulfurization, described two water desulfurated plasters are the heat-engine plant desulfurized solid waste that produces---desulfurated plaster; Described pozzolanic activity mineral material is II level flyash, slag micropowder (595); Described alkali-activator is calcium oxide (350 order), cement (42.5); Described setting accelerator: be sodium sulfate, calcium formiate; Described hardening accelerator: sulphur aluminic acid cement; Described water-holding agent: hydroxypropyl methyl cellulose ether (40,000); Described binding agent: polyvinyl alcohol (2488); Described fine aggregate: river sand, fineness modulus 2.4.
The water-fast bottom layer brushing gypsum preparation method of above-mentioned two water desulfurization comprises its step:
1) with two water desulfurated plasters at first by displaying, attached water is reduced to below 15%, again the oven dry or air-dry;
2) while and active material slag micropowder (595), flyash (II level), exciting agent calcium oxide (250-350 order), cement (42.5), setting accelerator sodium sulfate or calcium formiate mix by proportioning, metering.
3) getting above-mentioned compound 40-60%, adding hardening accelerator, water-holding agent, binding agent, in proportion, metering mixes.
4) the water use is converted at the scene, and (powder: water): 1: 0.176,5min stirred water consumption, and 3min is quiet to be put, and the 3min that goes again stirs.
The water-fast bottom layer brushing gypsum of two water desulfurization disclosed by the invention, and production method, detect through laboratory repetition test and Shanghai Jian Keyuan: folding strength, ultimate compression strength, cohesive strength, coefficient of softening, final setting time, up to standard, performance is all good.Its reaction mechanism is: two water desulfurated plasters, and essential air-setting material, itself does not have self-hardening property, gelling.But be exciting agent.Have only by the active pozzolans material with under the exciting of alkali-activator, short its modification becomes the gelling material.Under the mechanism of this active material and exciting agent modification, add active material and excitation material, under water participates in, fully carried out hydration reaction, generated ettringite (AFt) and hydrated calcium silicate (C-S-H) gelling.Real round forming, compact, the uniform skeleton structure of calcium alum for the dihydrate gypsum of aquation.And hydrated calcium silicate gel, cross-lapping fill among it, form whole.Making it to generate has sufficient amount, reasonable, the hard-packed hydrated product of crystal shape, is that intensity and water resistance are greatly improved.At this moment the variation of matter has taken place in material, catchments rigid and air-setting advantage.
The water-fast bottom layer brushing gypsum of a kind of two water desulfurization disclosed by the invention, every index surpasses the JC/T517-2004 standard-required, detect through Shanghai Jian Keyuan: report shows: folding strength: 3.6mpa (standard: 2.0mpa), ultimate compression strength: 11.0mpa (standard: 4.0mpa), cohesive strength: 0.50mpa (standard: 0.3mpa), coefficient of softening: 0.60 (standard: do not have), final setting time: 6H (standard≤8H).
The amount of dissolving of two water desulfurated plasters reaches 40-60% among the present invention, the desulfurated plaster of dissolving in a large number.This has far-reaching economic benefit, social benefit, environmental benefit, ecological benefits for saving plaster of paris resource, saving land resources, protection ecology, save energy, minimizing pollution.
Embodiment
Below in conjunction with example, the present invention is further elaborated explanation.
The present invention is to provide the water-fast bottom layer brushing gypsum of a kind of two water desulfurization, and production method.Its component and weight percent are:
1, original state two water desulfurated plaster: 65-75%
Pozzolanic activity mineral material: 20-25%
Exciting agent: 5-15%
Setting accelerator: 0.5-2.0%
2, compound: 40-60% fills a prescription on
Hardening accelerator: 5-15%
Water-holding agent: 0.01-0.10%
Binding agent: 0.1-0.2%
Fine aggregate: 40-60%
Above-described two water desulfurated plasters: be thermal power plant's Wingdale---gypsum, the solid waste that wet desulphurization produced---desulfurated plaster; Described active material is blast-furnace cinder micro-powder (595), flyash (II level); Described exciting agent: be 42.5 cement, calcium oxide (250-350 order); Described setting accelerator: be calcium formiate, sodium sulphate; Described hardening accelerator is sulphur aluminic acid cement; Described water-holding agent: be hydroxypropyl methyl cellulose ether (40,000); Described binding agent: be polyvinyl alcohol (2488); Described fine aggregate: be river sand, fineness modulus: 2.4.
The preparation method of the water-fast bottom layer brushing gypsum of the present invention's two water desulfurization is:
1) two water desulfurated plasters is displayed about 15d, attached water content is reduced to below 15%, again row oven dry or air-dry.
2) simultaneously, with active material slag micropowder (595), II level flyash, exciting agent 42.5 cement, calcium oxide (250-350 order), setting accelerator sodium sulfate or calcium formiate are mixed into dry powder.
3) get above-mentioned dry powder blend material 40-60% again, and hardening accelerator: sulphur aluminic acid cement, water-holding agent: hydroxypropyl methyl cellulose ether (40,000), binding agent: polyvinyl alcohol (2488), fine aggregate: river sand mixes and forms product.
4) water is converted at the scene, and water consumption (powder: water): 1: 0.176,5min stirred, the quiet 3min of putting, and the stirring of going again can be used.
Embodiment one:
The raw material ratio of this example is:
1, original state two water desulfurated plasters (oven dry or air-dry): 65%
Slag micropowder (595): 23%
Flyash (II level): 1.5%
Cement (42.5): 8.0%
Calcium oxide (250-350 order): 1.5%
Sodium sulfate: 1.0%
2, the compound of filling a prescription on: 40%
Sulphur aluminic acid cement: 12%
Hydroxypropyl methyl cellulose ether (40,000): 0.08%
Polyvinyl alcohol (2488): 0.2%
River sand (fineness modulus 2.4): 58%
Its production method is that step comprises:
1) original state two water desulfurated plasters is displayed, made it contain attached water and be lower than 15%, again row oven dry or air-dry;
2) then with 595 slag micropowders, II level flyash activity material, 300 order calcium oxide, 42.5 cement excitation materials, and the short gel material of sodium sulfate mixes by proportioning, metering and stir, promptly composite gelled material claims the core masterbatch again.
3)------fine aggregate mixing stirring is finished product for water-holding agent, polyvinyl alcohol (2488)---binding agent, river sand (fineness modulus 2.4)---for hardening accelerator, hydroxypropylcelluloether ether (40,000) again with 40% of compound on it, with sulphur aluminic acid cement.
4) water is converted at the scene, by water consumption (powder: water) 1: 0.176, stir 5min, the quiet 3min of putting, row stirs again.
Embodiment two:
The raw material ratio of this example is:
1, original state two water desulfurated plasters: 70%
Active slag micro mist: 22.5%
Cement: 6.0%
Calcium oxide: 1.0%
Sodium sulfate: 0.5%
2, the compound of filling a prescription on: 45%
Sulphur aluminic acid cement: 8.0%
Hydroxypropyl methyl cellulose ether: 0.1%
Polyvinyl alcohol: 0.3%
In thick river sand: 47%
Its production method is, may further comprise the steps:
With oven dry or two air-dry water desulfurated plasters, be mixed into dry powder with slag micropowder, calcium oxide, cement, sodium sulfate by proportioning, metering, get its 45%, again with sulphur aluminic acid cement, Vltra tears, polyvinyl alcohol, in thick river sand mix and make finished product by proportioning, metering equally.Time spent, convert water by powder: water=1: 0.176, stir 5min, the quiet 3min of putting, row stirs again.
Claims (5)
1. water-fast bottom layer brushing gypsum of two water desulfurization and production method thereof, form by following share, weight:
1) original state two water desulfurated plaster: 65-75%
Pozzolanic activity mineral material: 20-25%
Exciting agent: 5-15%
Setting accelerator: 0.5-2%
2) go up prescription compound: 40-60%
Hardening accelerator: 5-15%
Water-holding agent: 0.01-0.1%
Binding agent: 0.1-0.2%
Fine aggregate: 40-60%.
2. according to claim 1, the water-fast bottom layer brushing gypsum of described two water desulfurization is characterized in that: solid waste---the desulfurated plaster that described two water desulfurization fuel-burning power plant wet desulphurizations are produced.
3. according to claim 1, the water-fast bottom layer brushing gypsum of described two water desulfurization, it is characterized in that: described pozzolanic activity material is: II level flyash, blast-furnace cinder micro-powder; Described exciting agent is: cement, calcium oxide; Described setting accelerator is: calcium formiate, sodium sulfate.
4. according to claim 1, described hardening accelerator is: sulphur aluminic acid cement; Described water-holding agent is: Vltra tears; Described binding agent is: polyvinyl alcohol, rubber powder; Described fine aggregate is: river sand, fineness modulus 2.4.
5. according to claim 1, the water-fast bottom layer brushing gypsum production method of described two water desulfurization the steps include:
1) will contain two water desulfurated plasters of 30-40% attached water, and take to display, air-dry or oven dry, enter storage tank or packed stand-by;
2) active material slag and excitation material calcium oxide, grinding stores stand-by respectively to the 250-350 order;
3) oven dry or air-dry two water desulfurated plasters and activity, the excitation material behind the grinding, setting accelerator is mixed into powdery, gets 40-60%, is mixed into finished product with hardening accelerator, water-holding agent, binding agent, fine aggregate again;
4) on-the-spot by water consumption: 1: 0.176, stir 5min, the quiet 3min that stops, row stirs again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101229170A CN102190476A (en) | 2010-03-12 | 2010-03-12 | Water-tolerant desulfured dihydrate stuccogypsum for bottom layer and production method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101229170A CN102190476A (en) | 2010-03-12 | 2010-03-12 | Water-tolerant desulfured dihydrate stuccogypsum for bottom layer and production method thereof |
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| CN102190476A true CN102190476A (en) | 2011-09-21 |
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| CN2010101229170A Pending CN102190476A (en) | 2010-03-12 | 2010-03-12 | Water-tolerant desulfured dihydrate stuccogypsum for bottom layer and production method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102503334A (en) * | 2011-10-28 | 2012-06-20 | 南京工业大学 | Surface layer whitewash gypsum using dry-process desulfurized ash as raw material and preparation method thereof |
| CN102531507A (en) * | 2011-10-28 | 2012-07-04 | 江苏尼高科技有限公司 | Method for preparing gypsum plaster for base coating from dry desulfurization ash |
| CN106699089A (en) * | 2015-08-14 | 2017-05-24 | 美丽佳建材（北京）有限公司 | Novel energy-saving and environment-friendly waterproof plastering gypsum and preparation method thereof |
| WO2021023366A1 (en) * | 2019-08-05 | 2021-02-11 | Wacker Chemie Ag | Cementitious binder compositions |
-
2010
- 2010-03-12 CN CN2010101229170A patent/CN102190476A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102503334A (en) * | 2011-10-28 | 2012-06-20 | 南京工业大学 | Surface layer whitewash gypsum using dry-process desulfurized ash as raw material and preparation method thereof |
| CN102531507A (en) * | 2011-10-28 | 2012-07-04 | 江苏尼高科技有限公司 | Method for preparing gypsum plaster for base coating from dry desulfurization ash |
| CN102503334B (en) * | 2011-10-28 | 2013-05-08 | 南京工业大学 | Surface layer whitewash gypsum using dry-process desulfurized ash as raw material and preparation method thereof |
| CN102531507B (en) * | 2011-10-28 | 2014-07-02 | 江苏尼高科技有限公司 | Method for preparing gypsum plaster for base coating from dry desulfurization ash |
| CN106699089A (en) * | 2015-08-14 | 2017-05-24 | 美丽佳建材（北京）有限公司 | Novel energy-saving and environment-friendly waterproof plastering gypsum and preparation method thereof |
| WO2021023366A1 (en) * | 2019-08-05 | 2021-02-11 | Wacker Chemie Ag | Cementitious binder compositions |
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Application publication date: 20110921 |