CN102807333A - Method for preparing sulphoaluminate cement by using fluorine-containing sludge - Google Patents
Method for preparing sulphoaluminate cement by using fluorine-containing sludge Download PDFInfo
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- CN102807333A CN102807333A CN2012103013729A CN201210301372A CN102807333A CN 102807333 A CN102807333 A CN 102807333A CN 2012103013729 A CN2012103013729 A CN 2012103013729A CN 201210301372 A CN201210301372 A CN 201210301372A CN 102807333 A CN102807333 A CN 102807333A
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- fluorine
- mud
- containing sludge
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- aluminosulfate cement
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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Abstract
The invention provides a method for preparing sulphoaluminate cement by using fluorine-containing sludge, and belongs to the technical field of environmental engineering. The method comprises the following steps that 1, solidifying and desiccating fluorine-containing sludge; and 2, producing sulphoaluminate cement, wherein (1) preparation of raw materials: preparing the sulphoaluminate cement by using the following raw materials in percentage by weight: over 45 percent of CaO, 25 to 35 percent of Al2O3, less than 15 percent of SiO2, over 10 percent of gypsum and 1 to 3 percent of fluorine-containing sludge; (2) burning of chamotte: calcining the raw materials in a rotary kiln at the temperature of between 1,300 and 1,400 DEG C; and (3) preparation of cement: mixing 75 to 80 percent of the chamotte and 20 to 25 percent of the fluorine-containing sludge and grinding the chamotte and the fluorine-containing sludge until a specified specific surface area is reached. According to the method, the aims of innocent, stabilized and recycling use of sludge are achieved by adding the fluorine-containing sludge into the sulphoaluminate cement and burning the mixture of fluorine-containing sludge and the sulphoaluminate cement, so not only energy is saved, but also environment is protected and mankind is benefited.
Description
Technical field
The invention belongs to field of environment engineering technology, relate in particular to a kind of method of firing aluminosulfate cement that fluorine-containing mud is mixed.
Background technology
At sewage treatment area, the minimizing of the processing of mud and disposal and mud and resource utilization are one of important topics of environment protection treating.The by product of mud after as WWT.By the extremely complicated heterogeneous body that organic relic, microbial cells, inorganic particle, colloid etc. are formed, dewatered sludge account for usually the sewage quantity volume 0.3%～0.5% or quality 1%～2%.Because sewage source is different, the mud of handling the back generation has different characteristic.It is special solid waste; Mud is the difficult problem of the normal operation of puzzlement Sewage Plant in sewage treatment project always; How to deal carefully with disposing sludge, realize that the minimizing, stabilization of mud, innoxious, resource utilization are the targets that many national scholars and engineering technical personnel seek assiduously always.
Along with the development of electron trade, to the also increase year by year of demand of hydrofluoric acid.Hydrofluoric acid in use can produce fluoride waste, can produce a large amount of fluorinated calcium mud after the water treatment.At present, fluorine-containing mud does not have comprehensive Utilization Ways, all is after through preliminary mummification water ratio being reduced to 60%, to send Hazardous wastes landfill yard landfill disposal, not only takies the landfill yard resource, also causes the wasting of resources.
Solid waste is the resource that mislays in fact, for calcium fluoride sludge, if after taking suitable Technology to handle, can be used as starting material and be used for a plurality of industries.To the calcium fluoride sludge of electron trade generation, if Calcium Fluoride (Fluorspan) and moisture content are wherein only arranged, can be with being sold to hydrofluoric acid factory hydrogen manufacturing fluoric acid as starting material after the Calcium Fluoride (Fluorspan) mummification; If the mud composition is comparatively complicated, can mud be cured stabilization treatment, then dewatered sludge is sold to the cement mill or the steam brick field is used.
Summary of the invention
The purpose of this invention is to provide the method in a kind of sintering procedure that fluorine-containing mud is mixed aluminosulfate cement, with innoxious, the stabilization that reaches fluorine-containing mud, the purpose of recycling.
Method of the present invention realizes through following steps: fluorine-containing sludge curing of the first step and mummification, second step, the production of aluminosulfate cement.
The first step: fluorine-containing sludge curing and mummification, the mud that the fluorine content that Sewage Plant is obtained is bigger adds solidifying agent and stablizer in mud, then through mechanical stirring, make mud and curing stablizer mix.Under stabilizer function, fluorion is stabilized, makes the fluorine leaching amount of mud reduce greatly, is able to strengthen through immobilized mud viscosity reduction, hardness.The mud that fixes adopts the rotary drying stove to add the moisture in the heat abstraction mud, promptly obtains fluorine-containing curing mud.
Second step: the production of aluminosulfate cement; Wherein (1) prepares raw material, and the raw material that aluminosulfate cement adopts is Wingdale, alumina, gypsum and fluorine-containing mud, and concrete weight proportion is: Wingdale: CaO＞45%; Alumina: Al
2O
325～35%, SiO
2＜15%; Gypsum:＞10%; Fluorine-containing mud: add-on is 1～3%; Raw material basicity factor Cm≤1 of aluminosulfate cement; Aluminium-sulfur ratio P≤3.82.(2) grog burns till, and raw material are calcined in rotary kiln, and temperature is between 1300～1400 ℃.The grog forming process is: in the time of 950 ℃, C4A3S and C2AS begin to form; In the time of 1100 ℃, C2S occurs; In the time of 1200 ℃, C2AS disappears, and 2C2SCaSO occurs
4In the time of 1250 ℃, C2S increases; In the time of 1300～1400 ℃, 2C2SCaSO
4Disappear, grog burns till.(3) cement production, grog 75-80%, fluorine-containing mud 20-25% mix levigately to stipulating specific surface area, promptly get aluminosulfate cement.
Principle: will add mineralizer in the making processes of cement, it mainly acts on is to improve solid phase and liquid phase reaction effect, the CaF among the present invention in the fluorine-containing curing mud
2And CaSO
4Then just the most generally, the most sophisticated mineralizer; Process the stage at cement; In cement production process, need mix a large amount of gypsum for aluminosulfate cement; Here the effect of gypsum mainly is the main ingredient of participating in hydration reaction; In the gypsum adjustable aluminosulfate cement of different incorporations fast hard, expand and from stress, with fluorine-containing mud instead of part gypsum, better effects if.
The invention has the beneficial effects as follows: fluorine-containing mud is mixed in the sintering procedure of aluminosulfate cement, with innoxious, the stabilization that reaches mud, the purpose of recycling.Both practiced thrift the energy, protected environment again, promoted the well-being of mankind.
Embodiment
Further the present invention is explained below in conjunction with embodiment;
Embodiment 1: (1) fluorine-containing sludge curing and mummification, the mud that the fluorine content that Sewage Plant is obtained is bigger adds solidifying agent and stablizer in mud, then through mechanical stirring, make mud and curing stablizer mix.Obtain the fluorine-containing mud of solidified.(2) production of aluminosulfate cement; 1) preparation raw material, the raw material that aluminosulfate cement adopts is Wingdale, alumina and gypsum.Concrete proportioning is: Wingdale 45%, and Al2O3 25%, and SiO2 15%, gypsum 12%, fluorine-containing mud 3%; 2) grog burns till, and raw material are generally calcined in rotary kiln, and temperature is calcined under 1300～1400 ℃, and the grog forming process is: in the time of 950 ℃, C4A3S and C2AS begin to form; In the time of 1100 ℃, C2S occurs; In the time of 1200 ℃, C2AS disappears, and 2C2SCaSO occurs
4In the time of 1250 ℃, C2S increases; In the time of 1300～1400 ℃, 2C2SCaSO
4Disappear, grog burns till.3) cement production, aluminosulfate cement, admixture gypsum, add-on is levigate to the regulation specific surface area, promptly gets aluminosulfate cement.In this process, add and be no more than 10% fluorine-containing mud instead of gypsum, add 10% fluorine-containing mud simultaneously as mixing material.
Embodiment 2: (1) fluorine-containing sludge curing and mummification, the mud that the fluorine content that Sewage Plant is obtained is bigger adds solidifying agent and stablizer in mud, then through mechanical stirring, make mud and curing stablizer mix.Obtain solidified mud.(2) production of aluminosulfate cement, 1) the preparation raw material, the raw material that aluminosulfate cement adopts is Wingdale, alumina and gypsum.Concrete proportioning is: Wingdale 50%, and Al2O325%, SiO2 10%, gypsum 14%, fluorine-containing mud 1%; 2) grog burns till, and raw material are generally calcined in rotary kiln, and temperature is calcined under 1300～1400 ℃, and the grog forming process is: in the time of 950 ℃, C4A3S and C2AS begin to form; In the time of 1100 ℃, C2S occurs; In the time of 1200 ℃, C2AS disappears, and 2C2SCaSO occurs
4In the time of 1250 ℃, C2S increases; In the time of 1300～1400 ℃, 2C2SCaSO
4Disappear, grog burns till.3) cement production, aluminosulfate cement, admixture gypsum, add-on is levigate to the regulation specific surface area, promptly gets aluminosulfate cement.In this process, add and be no more than 10% fluorine-containing mud instead of gypsum, add 15% fluorine-containing mud simultaneously as mixing material.
What should explain at last is: obviously, the foregoing description only be for clearly the present invention is described and is done for example, and be not qualification to embodiment.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change, conspicuous variation of being extended out thus or change still are among protection scope of the present invention.
Claims (2)
1. one kind prepares the method for aluminosulfate cement with fluorine-containing mud, and characteristic realizes through following steps: the first step: fluorine-containing sludge curing and mummification; Second step: the production of aluminosulfate cement; Wherein (1) prepares raw material, and the raw material that aluminosulfate cement adopts is Wingdale, alumina, gypsum and fluorine-containing mud, and concrete weight proportion is: Wingdale: CaO＞45%; Alumina: Al
2O
325～35%, SiO
2＜15%; Gypsum:＞10%; Fluorine-containing mud: add-on is 1～3%; Raw material basicity factor Cm≤1 of aluminosulfate cement; Aluminium-sulfur ratio P≤3.82; (2) grog burns till, and raw material are calcined in rotary kiln, and temperature is between 1300～1400 ℃; (3) cement production, grog 75-80%, fluorine-containing mud 20-25% mix levigately to stipulating specific surface area, promptly get aluminosulfate cement.
2. a kind of method that fluorine-containing mud is prepared aluminosulfate cement according to claim 1; It is characterized in that fluorine-containing sludge curing and mummification are the bigger mud of fluorine content that Sewage Plant is obtained; In mud, add solidifying agent and stablizer; Through mechanical stirring, make mud and curing stablizer mix then; Under stabilizer function, fluorion is stabilized, makes the fluorine leaching amount of mud reduce greatly, is able to strengthen through immobilized mud viscosity reduction, hardness; The mud that fixes adopts the rotary drying stove to add the moisture in the heat abstraction mud, promptly obtains fluorine-containing curing mud.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210301372.9A CN102807333B (en) | 2012-08-23 | 2012-08-23 | Method for preparing sulphoaluminate cement by using fluorine-containing sludge |
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|---|---|---|---|
| CN201210301372.9A CN102807333B (en) | 2012-08-23 | 2012-08-23 | Method for preparing sulphoaluminate cement by using fluorine-containing sludge |
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| CN102807333A true CN102807333A (en) | 2012-12-05 |
| CN102807333B CN102807333B (en) | 2014-06-18 |
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| CN201210301372.9A Expired - Fee Related CN102807333B (en) | 2012-08-23 | 2012-08-23 | Method for preparing sulphoaluminate cement by using fluorine-containing sludge |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106810094A (en) * | 2017-03-17 | 2017-06-09 | 山东大学 | The system and method for cement joint production sulphur is prepared using municipal waste and Industrial Solid Waste |
| CN108046628A (en) * | 2018-01-29 | 2018-05-18 | 盐城工学院 | A kind of sulphoaluminate cement clinker, cement and preparation method thereof |
| CN115849742A (en) * | 2022-12-12 | 2023-03-28 | 西安建筑科技大学 | Method for preparing efficient enhanced clinker mineralizer by cooperation of fluorine-containing sludge and trace heavy metal oxide |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1163237A (en) * | 1997-01-08 | 1997-10-29 | 中国建筑材料科学研究院水泥所阳泉联营特种水泥厂 | Super high strength quick hardening sulfaluminous cement |
| CN1432455A (en) * | 2002-01-09 | 2003-07-30 | 滨池国际有限公司 | Bamboo board producing process |
| CN1837121A (en) * | 2006-04-20 | 2006-09-27 | 中国地质大学（北京） | Method for preparing sulphate aluminium cement by red mud |
| CN101671133A (en) * | 2009-09-30 | 2010-03-17 | 永州市中大特种水泥有限责任公司 | Modified low-alkalinity sulphoaluminate cement |
-
2012
- 2012-08-23 CN CN201210301372.9A patent/CN102807333B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1163237A (en) * | 1997-01-08 | 1997-10-29 | 中国建筑材料科学研究院水泥所阳泉联营特种水泥厂 | Super high strength quick hardening sulfaluminous cement |
| CN1432455A (en) * | 2002-01-09 | 2003-07-30 | 滨池国际有限公司 | Bamboo board producing process |
| CN1837121A (en) * | 2006-04-20 | 2006-09-27 | 中国地质大学（北京） | Method for preparing sulphate aluminium cement by red mud |
| CN101671133A (en) * | 2009-09-30 | 2010-03-17 | 永州市中大特种水泥有限责任公司 | Modified low-alkalinity sulphoaluminate cement |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106810094A (en) * | 2017-03-17 | 2017-06-09 | 山东大学 | The system and method for cement joint production sulphur is prepared using municipal waste and Industrial Solid Waste |
| CN106810094B (en) * | 2017-03-17 | 2019-03-19 | 山东大学 | The system and method for cement joint production sulphur is prepared using municipal waste and Industrial Solid Waste |
| CN108046628A (en) * | 2018-01-29 | 2018-05-18 | 盐城工学院 | A kind of sulphoaluminate cement clinker, cement and preparation method thereof |
| CN115849742A (en) * | 2022-12-12 | 2023-03-28 | 西安建筑科技大学 | Method for preparing efficient enhanced clinker mineralizer by cooperation of fluorine-containing sludge and trace heavy metal oxide |
| CN115849742B (en) * | 2022-12-12 | 2024-04-26 | 西安建筑科技大学 | Method for preparing efficient enhanced clinker mineralizer by cooperation of fluorine-containing sludge and trace heavy metal oxide |
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| CN102807333B (en) | 2014-06-18 |
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Effective date of registration: 20140421 Address after: 215000, Suzhou, Jiangsu province Luzhi Town, Wuzhong District City Road No. 16 (Science and Technology Park) Applicant after: SUZHOU WEIYU TIANCHENG ENVIROMENTAL TECHNOLOGY CO.,LTD. Address before: School of environment Hohai University Jiangsu 210098 Nanjing province No. 1 Xikang Road Applicant before: Huang Jingyu |
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