CN103626422B - A kind of fluorgypsum, fly ash concrete expansion agent - Google Patents
A kind of fluorgypsum, fly ash concrete expansion agent Download PDFInfo
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- CN103626422B CN103626422B CN201210306121.XA CN201210306121A CN103626422B CN 103626422 B CN103626422 B CN 103626422B CN 201210306121 A CN201210306121 A CN 201210306121A CN 103626422 B CN103626422 B CN 103626422B
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- flyash
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Abstract
A kind of fluorgypsum, fly ash concrete expansion agent, comprise and being prepared by the raw material of following weight percent: fluorine gypsum powder: 20 ~ 60%; Flyash: 20 ~ 40%; Unslaked lime: 0 ~ 10%; High-alumina cement: 0 ~ 20%; Xylogen calcium: 0.1% ~ 2%; Lauric acid: 0.05% ~ 0.5%; Glucose sodium carbonate: 0.05% ~ 0.5%.Main raw material of the present invention is fluorine chemical waste residue, with low cost, product does not need calcining, mixes as long as drop in ball mill, grinding is to requiring fineness, technique is simple, and production process is pollution-free, energy-conserving and environment-protective, it is the novel method of a comprehensive treating process solid refuse, can reduce the environmental stress of fluorine chemical enterprise on the one hand, also can create high economic worth, the comprehensive treating process for fluorine chemical enterprise waste residue opens a new way simultaneously.
Description
Technical field
The present invention relates to cement expansive material technical field, be specifically related to a kind of fluorgypsum, fly ash concrete expansion agent.
Background technology
China discharges fluorine chemical waste residue every year and reaches more than 300 ten thousand tons, the maximum annual total release of fluoride salt manufacturer Hunan fluorine chemistry group in Hunan reaches 500,000 tons of fluorgypsums, in addition a large amount of iron content pressure slags is also had, containing Silicon pressure slag, 4,000,000 tons, the fluorine chemical waste residue that accumulative discharge does not over several years utilize.Except part dry method gypsum directly sells to some gypsum processing enterprises and retardant is done in cement mill in these fluorine chemical waste residues, all the other major parts are all piled up.The fluorgypsum of these bulk depositions causes environmental pollution and potential safety hazard on the one hand; On the other hand because its stacking takies a large amount of plant areas land used, seriously govern production, is the large millstone around one's neck of enterprise one.Therefore, find suitable process approach and just seem very necessary.
Flyash is the by product of thermal power plant's generating, and itself is also the one of waste residue, and main oxides consists of: SiO
2, Al
2o
3, FeO, Fe
2o
3, CaO, TiO
2deng.Along with the development of power industry, the flyash quantity discharged of coal-burning power plant increases year by year, and a large amount of flyash does not add process, will produce airborne dust, atmosphere pollution; River can be caused to silt up if enter water system.The process of flyash and application have also become the problem of people's extensive concern.
In the cement expansive material that current China produces, be all calcium sulphoaluminate type swelling agent mostly, provide Al by various
2o
3, SO
3the raw material composition in source, its mechanism is Al
2o
3, SO
3form ettringite with this three's aquation of CaO of hydrated cementitious and produce expansion character.There is provided the raw material of aluminum oxide to have sulfoaluminate clinker, aluminate cement grog, kaolin, coal gangue, flint clay, flyash, bauxitic clay, alunite etc., the raw material mainly gypsum of sulphur trioxide is provided.Domestic existing concrete swelling agent is generally adopt the alumina based material such as bauxitic clay, alunite and the plaster of paris carries out high-temperature calcination and grinding processes, complex process, and requires strict to treatment temp etc., in kiln, easily ring formation becomes block, waste raw material, energy consumption is high, the bad control of technique.And the alumina based material such as bauxitic clay and alunite alkali content is high.
Summary of the invention
Technical problem solved by the invention is to provide a kind of fluorgypsum, fly ash concrete expansion agent, thus solves the problem in above-mentioned background technology.
Technical problem solved by the invention realizes by the following technical solutions:
A kind of fluorgypsum, fly ash concrete expansion agent, comprise and being prepared by the raw material of following weight percent:
Fluorine gypsum powder: 20 ~ 60%;
Flyash: 20 ~ 40%;
Unslaked lime: 0 ~ 10%;
High-alumina cement: 0 ~ 20%;
Xylogen calcium: 0.1% ~ 2%;
Lauric acid: 0.05% ~ 0.5%;
Glucose sodium carbonate: 0.05% ~ 0.5%.
Improve as one, described fluorine gypsum powder is the anhydrous fluorgypsum of dry method produced in fluoride salt production process.
Improve as one, described flyash is low calcium aluminous fly-ash, Al
2o
3weight content is more than 25%, and CaO weight content is below 3%.
Further improve as one, the preferred Al of described flyash
2o
3the low calcium aluminous fly-ash of weight content>=30%, CaO weight content≤2.5%.
Containing a large amount of active A l in flyash
2o
3(vitreum Al
2o
3), can as the aluminum raw material producing swelling agent.In addition, also containing part f-CaO (free calcium oxide) in flyash, be active advantageous component.The anhydrous fluorgypsum CaSO discharged in fluorine chemical production process
4content, about 90%, utilizes its effective SO
3with the Al in flyash
2o
3it is feasible for preparing cement expansive material.And without the need to calcining in production swelling agent process, technique is simple, and only need grinding to the specific surface area required and fineness, energy consumption is low, and output efficiency is high.
Improve as one, described unslaked lime is the commercially available unslaked lime that calcium carbonate decomposes through high-temperature calcination, calcium oxide weight content >=65%.
Based on the weight of unslaked lime, adding of CaO can generate a certain amount of Ca (OH)
2, both can produce certain expansion, supplement again the Ca (OH) in cement system
2, improve the weak base state of system, be conducive to ettringite (C
3a3CaSO
432H
2o) generation.
Improve as one, high-alumina cement is commercially available, Al
2o
3weight content is between 50%-55%.
Consider that flyash quality fluctuation is comparatively large, high-alumina cement can be mixed when content is lower in flyash as active A l
2o
3conditioning agent.
Sunmorl N 60S, lauric acid, xylogen calcium powder mixture are as admixture.Add a small amount of xylogen calcium to reduce the content of magnesium oxide and chlorion, add a small amount of lauric acid and glucose sodium carbonate to reduce hydration heat of cement, reduce the concrete temperature difference and shrink, suppress concrete structure cracking.
A kind of fluorgypsum, fly ash concrete expansion agent, comprise the steps: during preparation
Above-mentioned each raw materials batch is put into ball mill, and abundant combined grinding reaches 250-300m to specific surface area
2namely/kg obtains cement expansive material.
Owing to have employed above technical scheme, the present invention has following beneficial effect:
Main raw material of the present invention is fluorine chemical waste residue, with low cost, and product does not need calcining, mixes as long as drop in ball mill, and grinding is to requiring fineness, and technique is simple, and production process is pollution-free, energy-conserving and environment-protective, is the novel method of a comprehensive treating process solid refuse.The environmental stress of fluorine chemical enterprise can be reduced on the one hand, also can create high economic worth simultaneously.The comprehensive treating process that the method utilizing fluorine chemical waste residue to prepare high-effective concrete described in this patent is fluorine chemical enterprise waste residue opens a new way.
Embodiment
The technique means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with specific embodiment, setting forth the present invention further.
embodiment 1
Raw material sources:
Fluorgypsum: from Hunan China Xiangxiang Aluminum Plant;
Flyash: from Hunan China Xiang Tan thermal power plant;
Unslaked lime: from Dong He Lime Factory of Hunan China Shuangfeng County;
High-alumina cement: from Henan China Zhengzhou Hua Sheng refractory cements company;
Calcium lignin sulphonate: analytical pure, from Tianjin City, China Ye Zi Chemical Engineering Technology company limited;
Lauric acid: analytical pure, from Tianjin City, China recovery fine chemistry industry institute;
Glucose sodium carbonate: analytical pure, from Tianjin City, China Yong great chemical reagent research and development centre.
Part material chemical composition is in table 1
| Starting material | Loss on ignition | Al 2O 3 | MgO | SiO 2 | CaO | Fe 2O 3 | SO 3 |
| Fluorgypsum | 0.43 | 0.35 | 0.044 | 0.2 | 43.5 | 0.27 | 55.12 |
| Flyash | 2.3 | 31.29 | 0.67 | 56.03 | 2.03 | 0.18 | 0.60 |
Each material is weighed proportioning by regulation composition of raw materials, and the consumption of each raw material is as follows:
Fluorine gypsum powder: 65kg
Flyash: 30 kg
High-alumina cement: 4.5 kg
Xylogen calcium: 0.3 kg
Lauric acid: 0.1 kg
Glucose sodium carbonate: 0.1 kg
Above-mentioned each raw materials batch is put into ball mill, abundant combined grinding, make specific surface area reach 250m
2/ kg, obtains cement expansive material.
embodiment 2
The present embodiment is to prepare 100kg cement expansive material, and weigh proportioning by regulation composition of raw materials, the consumption of each raw material is as follows:
Fluorine gypsum powder: 60 kg
Flyash: 35 kg
Unslaked lime: 2kg
Xylogen calcium: 2 kg
Lauric acid: 0.5kg
Glucose sodium carbonate: 0.5kg
Above-mentioned each raw materials batch is put into ball mill, abundant combined grinding, make specific surface area reach 270m
2/ kg, obtains cement expansive material.
embodiment 3
The present embodiment is to prepare 100kg cement expansive material, and weigh proportioning by regulation composition of raw materials, the consumption of each raw material is as follows:
Fluorine gypsum powder: 57 kg
Flyash: 30 kg
High-alumina cement: 7.6 kg
Lime: 5 kg
Xylogen calcium: 0.2 kg
Lauric acid: 0.05 kg
Glucose sodium carbonate: 0.15 kg
Above-mentioned each raw materials batch is put into ball mill, abundant combined grinding, make specific surface area reach 300m
2/ kg, obtains cement expansive material.
According to technical indicator and the testing method of " cement expansive material " standard (GB23439-2009), respectively the properties tests such as time of coagulation, limited expansion rate, ultimate compression strength are carried out to cement expansive material obtained in embodiment.Its test result is as shown in the table.
cement expansive material test result
From above detected result:
Cement expansive material of the present invention meets standard GB/T 23439-2009 completely, and is better than national standard in all fields.
Raw material of the present invention is easy to get, and simply, with low cost, volume is few, usefulness is high, alkalinity is low, affect little on concrete slump for production technique and equipment.Product all meets " cement expansive material " standard GB/T 23439-2009 and other is about concrete admixture standard.There is good economic benefit, social benefit and environmental benefit.
More than show and describe ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification sheets just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (2)
1. fluorgypsum, a fly ash concrete expansion agent, is characterized in that, when preparing the cement expansive material of 100kg, following each raw materials batch is put into ball mill, and abundant combined grinding reaches 270m to specific surface area
2namely/kg obtains cement expansive material:
Fluorine gypsum powder, 60kg;
Flyash, 35kg;
Unslaked lime, 2kg;
Xylogen calcium, 2kg;
Lauric acid, 0.5kg;
Sunmorl N 60S, 0.5kg.
2. fluorgypsum, a fly ash concrete expansion agent, is characterized in that, when preparing the cement expansive material of 100kg, following each raw materials batch is put into ball mill, and abundant combined grinding reaches 300m to specific surface area
2namely/kg obtains cement expansive material:
Fluorine gypsum powder, 57kg;
Flyash, 30kg;
High-alumina cement, 7.6kg;
Lime, 5kg;
Xylogen calcium, 0.2kg;
Lauric acid, 0.05kg;
Sunmorl N 60S, 0.15kg.
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| CN103626422B true CN103626422B (en) | 2015-09-23 |
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| CN103964722B (en) * | 2014-05-04 | 2015-12-30 | 苏州市市政工程设计院有限责任公司 | A kind of chemical admixture improving cement expansive material usefulness under restricted condition |
| CN103979815B (en) * | 2014-05-27 | 2016-01-06 | 长沙矿山研究院有限责任公司 | A kind of obturator swelling agent for mining with stowing and preparation method thereof |
| CN104193285B (en) * | 2014-08-27 | 2016-05-04 | 安徽锦洋氟化学有限公司 | A kind of high-performance modified fluorgypsum |
| CN104402283A (en) * | 2014-10-31 | 2015-03-11 | 桂林华越环保科技有限公司 | Concrete expanding agent |
| CN104446092A (en) * | 2014-11-04 | 2015-03-25 | 张桂华 | Concrete expansive agent |
| US10865147B2 (en) * | 2017-09-12 | 2020-12-15 | Board Of Supervisors Of Louisiana State University And Agricultural And Mechanical College | High strength concrete-like fluorogypsum-based blends and production methods |
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| CN1217877C (en) * | 2001-08-29 | 2005-09-07 | 湖南湘铝有限责任公司 | Concrete expanding agent and its preparation |
| CN1257126C (en) * | 2004-06-15 | 2006-05-24 | 季元升 | Concrete sweller |
| CN102219422B (en) * | 2011-03-07 | 2014-05-07 | 武汉源锦建材科技有限公司 | Expanding clinker, expanding agent, concrete and preparation method of expanding clinker |
| CN102320767A (en) * | 2011-09-05 | 2012-01-18 | 王琴 | Concrete expansion agent |
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