CN103204643A - Method for preparing cement by modified compound coal ash - Google Patents
Method for preparing cement by modified compound coal ash Download PDFInfo
- Publication number
- CN103204643A CN103204643A CN2013101491858A CN201310149185A CN103204643A CN 103204643 A CN103204643 A CN 103204643A CN 2013101491858 A CN2013101491858 A CN 2013101491858A CN 201310149185 A CN201310149185 A CN 201310149185A CN 103204643 A CN103204643 A CN 103204643A
- Authority
- CN
- China
- Prior art keywords
- flyash
- cement
- coal ash
- composite
- coal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000004568 cement Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000010883 coal ash Substances 0.000 title abstract description 13
- 150000001875 compounds Chemical class 0.000 title abstract 6
- 239000010881 fly ash Substances 0.000 claims description 60
- 239000002131 composite material Substances 0.000 claims description 19
- 238000012986 modification Methods 0.000 claims description 18
- 230000004048 modification Effects 0.000 claims description 18
- 239000011505 plaster Substances 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 11
- 238000009826 distribution Methods 0.000 abstract description 4
- 239000002440 industrial waste Substances 0.000 abstract description 2
- 239000003245 coal Substances 0.000 abstract 1
- 238000013329 compounding Methods 0.000 abstract 1
- 238000006477 desulfuration reaction Methods 0.000 abstract 1
- 230000023556 desulfurization Effects 0.000 abstract 1
- 238000004134 energy conservation Methods 0.000 abstract 1
- 229910052602 gypsum Inorganic materials 0.000 abstract 1
- 239000010440 gypsum Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 10
- 238000002360 preparation method Methods 0.000 description 7
- 239000004567 concrete Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 230000003009 desulfurizing effect Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
Classifications
-
- 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
Abstract
The invention discloses a method for preparing cement by modified compound coal ash. The method comprises the following steps of: grinding the coal ashes until the specific surface areas of the coal ashes reaches 350 m<2>/kg-600m<2>/kg; selecting the coal ashes with the specific surface areas of 350 m<2>/kg-400 m<2>/kg, 450 m<2>/kg-500 m<2>/kg and 550 m<2>/kg-600 m<2>/kg; compounding the coal ashes in a proportion of (15%-25%):(25%-40%):(40%-60%) to obtain the modified compound coal ash; adding the modified compound coal to cement clinker in a proportion of 20%-40%, and adding desulfurization gypsum which is 0.5%-2.5% of the weight of the compound coal ash for mixing and grinding. The method for preparing cement by modified compound coal ash can be used for optimizing the grain size distribution by improving the fineness of the coal ash, so that the activity of the coal ash is improved, and therefore, and energy conservation and emission reduction can be realized by largely utilizing industrial waste residues.
Description
Technical field
The invention belongs to building material technical field, be specifically related to the method that the composite flyash of a kind of modification is used for cement production.
Background technology
Flyash is one of the most large industrial waste of China, and annual emissions surpasses 200,000,000 tons, and is more and more heavier to the burden of economic, society, environment.China's flyash research and development utilize and start from the 1950's, mainly concentrate on cement and the research of concrete development experiments, and widespread use in engineering construction.But cement mixture and concrete admixture have higher requirement to the quality of flyash, volume also has certain restriction simultaneously, have only the colory flyash of a very little part just to be permitted for concrete structure engineering, most of flyash is because particle is thick, water requirement is big, active low, can not in cement system, be utilized effectively.How breakthrough bottleneck, high-effect excavate the potentiality of more inferior flyash in cement cementitious system, when reducing construction costs, satisfy higher construction quality requirement, become problem demanding prompt solution.
Meanwhile, country strengthens the input of large-scale coal-fired enterprise flue-gas desulfurizing engineering in the Eleventh Five-Year Plan Environmental planning, the problem of efficiently utilizing of the industry byproduct desulfurated plaster that produces causes people's extensive concern, if it is mishandling, flue-gas desulfurizing engineering has just transformed the pollution form, fundamentally do not solve the pollution of sulfurous gas, and bank up precious resources such as more serious contaminated land, water sources.Therefore, how resource utilization efficiently utilizes desulfurated plaster to become the key that solves sulfur dioxide pollution.
Summary of the invention
The purpose of this invention is to provide the method that the composite flyash of a kind of modification is used for cement production, fineness by improving flyash is also optimized its particle size distribution, improve the activity of flyash, it is used for cement production in a large number, reduce cement cost, the flyash of bulk deposition is utilized effectively.
To achieve these goals, technical scheme of the present invention is:
The composite flyash of a kind of modification is used for the method for cement production, it is characterized in that, follows these steps to carry out:
(1) flyash grinding to specific surface area is reached 350m
2/ kg～600m
2/ kg, selecting specific surface area for use is 350m
2/ kg～400m
2/ kg, 450m
2/ kg～500m
2/ kg and 550m
2/ kg～600m
2The flyash of/kg carries out compositely according to the ratio of 15%～25%:25%～40%:40%～60%, get the composite flyash of modification;
A preferred version is: selecting specific surface area for use is 390m
2/ kg, 480m
2/ kg, 550m
2The flyash of/kg is composite with the 17%:33%:50% ratio;
This step is by the specific surface area of grinding raising flyash, and unit volume flyash activating point increases, and owing to the existence of Mechanochemical Effect, flyash activity is improved simultaneously.
(2) the composite flyash of gained modification is added in the cement clinker according to 20%～40% volume, adds the desulfurated plaster that accounts for flyash quality 0.5%～2.5%, combined grinding simultaneously; Preferably desulfurated plaster is dried under 50 ℃ to constant weight and obtain two water desulfurated plasters, volume is 1%～2% of flyash quality;
The specific surface area of ordinary Portland cement is 300m
2/ kg～400m
2/ kg, its particle size distribution is wider and discontinuous, but superfined flyash mix the gap grading of powder filler coal ash hydrated blended cement system part, make size distribution more reasonable, play and fill closely knit effect preferably;
Desulfurated plaster has increased Ca in the liquid phase (OH) when promoting the cement clinker aquation
2Concentration, the condition that provides is provided the alkali that is all flyash with alkaline matter one in the exciting agent; On the other hand, the desulfurated plaster in the system can be directly and the A1 in the flyash in alkaline environment
2O
3The active ingredient reaction generates ettringite, plays the effect of sulphate activation simultaneously.
Adopt technical scheme of the present invention, when doping quantity of fly ash is 20%～40%, adopt the flyash early activity of method of modifying preparation provided by the invention significantly to improve, the 28d activity index has improved 20%～25%.Modified coal ash is used for cement mixture produces PO42.5(R), PF42.5 (R) cement satisfies the requirement of GB175-2007 " general purpose portland cement " relevant art.Adopt modification provided by the invention and using method ordinary fly ash can be widely used in cement mixture, reduce cement clinker consumption, realize the target of energy-saving and emission-reduction.
Embodiment
Embodiment 1
Flyash is distinguished grinding to 400m
2/ kg, 500m
2/ kg, 550m
2/ kg, 3 kinds of flyash obtain composite flyash with the 17%:33%:50% mixed.Adopt the PI62.5R cement clinker, treat that cement grinding is to 300m
2Behind/the kg, mix 20% composite flyash, add the desulfurated plaster that accounts for flyash quality 1.0% simultaneously, mix grinding to specific surface area is 400m
2/ kg prepares PO52.5R cement.Its fundamental property sees Table 1.As shown in Table 1, with unmodified before flyash compare, adopt modification provided by the invention and using method to use the performance in each of preparation cement to improve 21%, 13%, 35%, 20% respectively as blended material in the length of time, effect is remarkable.
Fly-ash Preparation cement performance contrast before and after table 1 modification
Embodiment 2
Flyash is distinguished grinding to 400m
2/ kg, 500m
2/ kg, 550m
2/ kg, 3 kinds of flyash obtain composite flyash with the 15%:25%:60% mixed.Adopt the PI62.5R cement clinker, treat that cement grinding is to 300m
2Behind/the kg, mix 40% composite flyash, add the desulfurated plaster that accounts for flyash quality 1.0% simultaneously, mix grinding to specific surface area is 450m
2/ kg prepares PF42.5R cement.Its fundamental property sees Table 2.As shown in Table 2, with unmodified before flyash compare, adopt modification provided by the invention and using method to use the performance in each of preparation cement to improve 20%, 16%, 34%, 22% respectively as blended material in the length of time, effect is remarkable.
Fly-ash Preparation cement performance contrast before and after table 2 modification
Embodiment 3
Flyash is distinguished grinding to 400m
2/ kg, 500m
2/ kg, 550m
2/ kg, 3 kinds of flyash obtain composite flyash with the 17%:33%:50% mixed.Adopt the PI52.5R cement clinker, treat that cement grinding is to 300m
2Behind/the kg, mix 40% composite flyash, add the desulfurated plaster that accounts for flyash quality 2% simultaneously, mix grinding to specific surface area is 450m
2/ kg prepares PF42.5R cement.Its fundamental property sees Table 3.As shown in Table 3, with unmodified before flyash compare, adopt modification provided by the invention and using method to use the performance in each of preparation cement to improve 20%, 21%, 26%, 16% respectively as blended material in the length of time, effect is remarkable.
Fly-ash Preparation cement performance contrast before and after table 3 modification
Claims (3)
1. the composite flyash of modification is used for the method for cement production, it is characterized in that, follows these steps to carry out:
(1) flyash grinding to specific surface area is reached 350m
2/ kg～600m
2/ kg, selecting specific surface area for use is 350m
2/ kg～400m
2/ kg, 450m
2/ kg～500m
2/ kg and 550m
2/ kg～600m
2The flyash of/kg carries out compositely according to the ratio of 15%～25%:25%～40%:40%～60%, get the composite flyash of modification;
(2) the composite flyash of gained modification is added in the cement clinker according to 20%～40% volume, adds the desulfurated plaster that accounts for flyash quality 0.5%～2.5%, combined grinding simultaneously.
2. the composite flyash of modification according to claim 1 is used for the method for cement production, it is characterized in that selecting specific surface area for use is 390m
2/ kg, 480m
2/ kg, 550m
2The flyash of/kg is composite with the 17%:33%:50% ratio.
3. the composite flyash of modification according to claim 1 is used for the method for cement production, it is characterized in that, desulfurated plaster is dried under 50 ℃ to constant weight obtain two water desulfurated plasters, and volume is 1%～2% of flyash quality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310149185.8A CN103204643B (en) | 2013-04-25 | 2013-04-25 | The composite flyash of a kind of modification is used for method prepared by cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310149185.8A CN103204643B (en) | 2013-04-25 | 2013-04-25 | The composite flyash of a kind of modification is used for method prepared by cement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103204643A true CN103204643A (en) | 2013-07-17 |
| CN103204643B CN103204643B (en) | 2016-03-02 |
Family
ID=48752081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310149185.8A Active CN103204643B (en) | 2013-04-25 | 2013-04-25 | The composite flyash of a kind of modification is used for method prepared by cement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103204643B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108033731A (en) * | 2017-12-29 | 2018-05-15 | 成都精准混凝土有限公司 | Decorate granolithic concrete and its preparation process |
| CN115180844A (en) * | 2022-06-15 | 2022-10-14 | 盐城市鼎力新材料有限公司 | Activated superfine fly ash doped cement and preparation method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1045444A (en) * | 1996-07-30 | 1998-02-17 | Nippon Cement Co Ltd | Treatment of coal ash |
| CN1220978A (en) * | 1997-12-25 | 1999-06-30 | 张耀伦 | Less clinker high early strength flyash cement |
| CN1865180A (en) * | 2005-12-02 | 2006-11-22 | 韦柳青 | Method for producing cement using desulfurized gypsum and fine coal ash |
| CN101549965A (en) * | 2009-04-30 | 2009-10-07 | 中国建筑材料科学研究总院 | A cement-based solidified material for processing middle and low radioactive incineration ash and a method for processing middle and low radioactive incineration ash |
| CN101786811A (en) * | 2010-01-15 | 2010-07-28 | 中国水利水电第三工程局有限公司 | Method for preparing multicomponent powder binding material |
| CN102092973A (en) * | 2010-12-17 | 2011-06-15 | 南京工业大学 | Flyash cement and preparation method thereof |
| CN102795819A (en) * | 2012-08-23 | 2012-11-28 | 西南交通大学 | Low-carbon high-performance tunnel shotcrete composite cementing material |
-
2013
- 2013-04-25 CN CN201310149185.8A patent/CN103204643B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1045444A (en) * | 1996-07-30 | 1998-02-17 | Nippon Cement Co Ltd | Treatment of coal ash |
| CN1220978A (en) * | 1997-12-25 | 1999-06-30 | 张耀伦 | Less clinker high early strength flyash cement |
| CN1865180A (en) * | 2005-12-02 | 2006-11-22 | 韦柳青 | Method for producing cement using desulfurized gypsum and fine coal ash |
| CN101549965A (en) * | 2009-04-30 | 2009-10-07 | 中国建筑材料科学研究总院 | A cement-based solidified material for processing middle and low radioactive incineration ash and a method for processing middle and low radioactive incineration ash |
| CN101786811A (en) * | 2010-01-15 | 2010-07-28 | 中国水利水电第三工程局有限公司 | Method for preparing multicomponent powder binding material |
| CN102092973A (en) * | 2010-12-17 | 2011-06-15 | 南京工业大学 | Flyash cement and preparation method thereof |
| CN102795819A (en) * | 2012-08-23 | 2012-11-28 | 西南交通大学 | Low-carbon high-performance tunnel shotcrete composite cementing material |
Non-Patent Citations (1)
| Title |
|---|
| 王穆君: "低品质粉煤灰作为水泥混合材的试验研究", 《粉煤灰》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108033731A (en) * | 2017-12-29 | 2018-05-15 | 成都精准混凝土有限公司 | Decorate granolithic concrete and its preparation process |
| CN115180844A (en) * | 2022-06-15 | 2022-10-14 | 盐城市鼎力新材料有限公司 | Activated superfine fly ash doped cement and preparation method thereof |
| CN115180844B (en) * | 2022-06-15 | 2023-03-07 | 盐城市鼎力新材料有限公司 | Activated superfine fly ash doped cement and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103204643B (en) | 2016-03-02 |
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Address after: 310006 99 Huaxing Road, Xihu District, Hangzhou, Zhejiang (Hangzhou Neusoft business building) Co-patentee after: SHANGHAI RESEARCH INSTITUTE OF BUILDING SCIENCES (Group) Co.,Ltd. Patentee after: Zhejiang Tianda Environmental Protection Co.,Ltd. Address before: 310006 17 17, Hua zhe Plaza, North Ring Road, Hangzhou, Zhejiang. Co-patentee before: SHANGHAI RESEARCH INSTITUTE OF BUILDING SCIENCES (Group) Co.,Ltd. Patentee before: Zhejiang Tianda Environmental Protection Co.,Ltd. |
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Effective date of registration: 20180621 Address after: 310012 99 Huaxing Road, Xihu District, Hangzhou, Zhejiang (Hangzhou Neusoft business building) Co-patentee after: SHANGHAI RESEARCH INSTITUTE OF BUILDING SCIENCES (Group) Co.,Ltd. Patentee after: ZHEJIANG TIANDI ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Address before: 310006 99 Huaxing Road, Xihu District, Hangzhou, Zhejiang (Hangzhou Neusoft business building) Co-patentee before: SHANGHAI RESEARCH INSTITUTE OF BUILDING SCIENCES (Group) Co.,Ltd. Patentee before: Zhejiang Tianda Environmental Protection Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 310012 99 Huaxing Road, Xihu District, Hangzhou, Zhejiang (Hangzhou Neusoft business building) Co-patentee after: SHANGHAI RESEARCH INSTITUTE OF BUILDING SCIENCES (Group) Co.,Ltd. Patentee after: Zhejiang Tiandi Environmental Protection Technology Co.,Ltd. Address before: 310012 99 Huaxing Road, Xihu District, Hangzhou, Zhejiang (Hangzhou Neusoft business building) Co-patentee before: SHANGHAI RESEARCH INSTITUTE OF BUILDING SCIENCES (Group) Co.,Ltd. Patentee before: ZHEJIANG TIANDI ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. |
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Effective date of registration: 20231102 Address after: Room A710, Building 1, No. 2159-1 Yuhangtang Road, Wuchang Street, Yuhang District, Hangzhou City, Zhejiang Province, 310015 Patentee after: Zhejiang Zheneng Tianda Environmental Protection Technology Co.,Ltd. Patentee after: SHANGHAI RESEARCH INSTITUTE OF BUILDING SCIENCES (Group) Co.,Ltd. Address before: 310012 99 Huaxing Road, Xihu District, Hangzhou, Zhejiang (Hangzhou Neusoft business building) Patentee before: Zhejiang Tiandi Environmental Protection Technology Co.,Ltd. Patentee before: SHANGHAI RESEARCH INSTITUTE OF BUILDING SCIENCES (Group) Co.,Ltd. |
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