CN105110663A - Method for preparing geopolymer by using sludge ash - Google Patents
Method for preparing geopolymer by using sludge ash Download PDFInfo
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- CN105110663A CN105110663A CN201510467757.6A CN201510467757A CN105110663A CN 105110663 A CN105110663 A CN 105110663A CN 201510467757 A CN201510467757 A CN 201510467757A CN 105110663 A CN105110663 A CN 105110663A
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- Prior art keywords
- sludge ash
- geopolymer
- metakaolin
- alkali
- activator
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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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- Processing Of Solid Wastes (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to a method for preparing geopolymer by using sludge ash. The preparation method comprises: by taking sludge ash and metakaolin as raw materials, generating a sludge ash-based geopolymer under activation of a NaOH-water glass alkali-activator solution. The preparation method is simple and feasible in process, and not only can save resources, but also can realize resource utilization of sludge, thereby turning waste into wealth and killing two birds with one stone.
Description
Technical field
The invention belongs to the preparation of inorganic materials and the recycling field of mud, be specifically related to a kind of method that sludge ash prepares geopolymer.
Background technology
Along with the fast development of China's economy, the quantity discharged of city domestic sewage is increasing.2011 according to statistics, national key cities built together into sewage work 2288, and the output of mud is at 1741.3 ten thousand tons.Because sludge yield is large, water ratio is high, and containing a large amount of organic matter, germ, parasite and heavy metal etc., if deal with improperly, serious secondary pollution can be brought to environment, the resource utilization therefore realizing mud in the treating processes of mud becomes one of most effective way exploring that mud thoroughly effects a radical cure.Preparing the most widely used raw material of geopolymer is at present kaolin, its shortcoming is a kind of nonmetal mineral resource of kaolin, a kind of based on the clay of kaolinite race clay mineral or tonstein, if kaolin based geopolymer comes into operation in a large number, a large amount of Mineral resources will be consumed, and kaolinic price at 800-1500 yuan/ton not etc., causes the cost preparing kaolin based geopolymer higher.
Summary of the invention
The object of the present invention is to provide a kind of method utilizing sludge ash to prepare geopolymer, with mud bottom ash and metakaolin or mud flying dust and metakaolin for raw material, using NaOH-water glass as alkali-activator, under the katalysis of alkali-activator, make raw material generation geopolymeric reaction, form geopolymer.
In order to realize above-mentioned task, the present invention adopts following solution:
A kind of method utilizing sludge ash to prepare geopolymer, utilize sludge ash and metakaolin to be main raw material, the aqueous solution adding NaOH and water glass prepares a kind of novel inorganic silicate material-sludge ash base geological polymer with tridimensional network, and studies its feasibility by experiment.With silica alumina ratio, NaOH add-on and different material for major influence factors, by design control experiment, study these three kinds of factors to the impact of the performances such as sludge ash base geological polymer ultimate compression strength, determine optimal conditions, with the obtained geopolymer with excellent properties.
Utilize sludge ash to prepare a method for geopolymer, comprise the following steps:
Step 1: taking mud flying dust and metakaolin or mud bottom ash and metakaolin is raw material, and is placed in cement mortar mixer;
Step 2: be the NaOH of 12.8%-35% by the per-cent with raw materials quality and be mixed and made into alkali-activator with the water glass that the per-cent of raw materials quality is 12.5% and be dissolved in certain water gaging, water-solid ratio is 0.57, then the aqueous solution of alkali-activator is joined in cement mortar mixer, stir into the slurry mixed together with raw material;
Step 3: slurry is loaded in the cylindrical die of d=20.20mm, adopt pelleter to add 12MPa pressure compaction, shaping and demoulding, maintenance 7d under room temperature, makes sludge ash base geological polymer;
Step 4: utilize Universal motor to carry out intensity test to the geopolymer sample under different condition;
Described mud flying dust takes from green hill, Hangzhou Lishui sewage work, and its composition quality percentage ratio consists of: SiO
2: 40.9022%, Al
2o
3: 21.7987%, Fe
2o
3: 10.3797%, K
2o:3.0470%, Na
2o:0.88165%, MgO:1.5248%, impurity 21.466%; Described mud bottom ash utilizes the mud of the northern sewage work in Shenyang to be fired into sludge ash through Rotary pipe type atmosphere furnace at 800 DEG C, and its composition quality percentage ratio consists of: SiO
2: 54.9708%, Al
2o
3: 41.8081%, Fe
2o
3: 0.8923%, K
2o:0.2846%, MgO:0.0756%, impurity 1.97%; Described metakaolin Hunan is surpassed board metakaolin to calcine at 800 DEG C and form, and composition quality percentage ratio consists of SiO
2: 52.5%, Al
2o
3: 42.5%, CaO:0.1%, Fe
2o
3: 0.3%, MgO:0.1%, impurity 4.5%.
In order to further analyze obtained sludge ash base, by geopolymer buck powdered, SEM scanning and XRD test are carried out to sample powder, and by the analysis of XRD and scanning electronic microscope (SEM), the composition of sludge ash base geological polymer and configuration of surface is characterized.
Compared with prior art, the invention has the beneficial effects as follows:
(1) proposing employing sludge ash is the method that geopolymer prepared by raw material, both can save the resources such as kaolinite, and achieve again the recycling of mud simultaneously, avoid the secondary pollution of mud, turn waste into wealth, have extremely important meaning to the sewage handling problem in environmental problem;
(2) the geopolymer excellent performance prepared by, application prospect is very extensive, and it can do the sealing material of nuke rubbish, injection material, refractory materials, high-performance sheet material etc.
Embodiment
Embodiment 1:
Precise metakaolin 15g and mud flying dust 5g, and pour in cement mortar mixer.Be the NaOH of 12.8% by the per-cent with raw materials quality and be mixed and made into alkali-activator with the water glass that the per-cent of raw materials quality is 12.5% and be dissolved in certain water gaging, water-solid ratio is 0.57, then the alkali-activator aqueous solution is joined the slurry stirring into together with raw material in cement mortar mixer and mix; Slurry is injected the cylindrical die of d=20.20mm, add 12MPa pressure compaction, obtain shaping sample, the demoulding.By sample at room temperature maintenance 7d; After reaching the length of time, utilize Universal motor to carry out intensity test to sample, ultimate compression strength is 49.39MPa.
Embodiment 2:
Precise metakaolin 15g and mud flying dust 5g, and pour in cement mortar mixer.Be the NaOH of 25% by the per-cent with raw materials quality and be mixed and made into alkali-activator with the water glass that the per-cent of raw materials quality is 12.5% and be dissolved in certain water gaging, water-solid ratio is 0.57, then the alkali-activator aqueous solution is joined the slurry stirring into together with raw material in cement mortar mixer and mix; Slurry is injected the cylindrical die of d=20.20mm, add 12MPa pressure compaction, obtain shaping sample, the demoulding; By sample at room temperature maintenance 7d; After reaching the length of time, utilize Universal motor to carry out intensity test to sample, ultimate compression strength is 51.22MPa.
Embodiment 3:
Precise metakaolin 15g and mud flying dust 5g, and pour in cement mortar mixer.Be the NaOH of 35% by the per-cent with raw materials quality and be mixed and made into alkali-activator with the water glass that the per-cent of raw materials quality is 12.5% and be dissolved in certain water gaging, water-solid ratio is 0.57, then the alkali-activator aqueous solution is joined the slurry stirring into together with raw material in cement mortar mixer and mix; Slurry is injected the cylindrical die of d=20.20mm, add 12MPa pressure compaction, obtain shaping sample, the demoulding; By sample at room temperature maintenance 7d; After reaching the length of time, utilize Universal motor to carry out intensity test to sample, ultimate compression strength is 60.13MPa.
Embodiment 4:
Precise metakaolin 10g and mud flying dust 10g, and pour in cement mortar mixer.Be the NaOH of 25% by the per-cent with raw materials quality and be mixed and made into alkali-activator with the water glass that the per-cent of raw materials quality is 12.5% and be dissolved in certain water gaging, water-solid ratio is 0.57, then the alkali-activator aqueous solution is joined the slurry stirring into together with raw material in cement mortar mixer and mix; Slurry is injected the cylindrical die of d=20.20mm, add 12MPa pressure compaction, obtain shaping sample, the demoulding; By sample at room temperature maintenance 7d; After reaching the length of time, utilize Universal motor to carry out intensity test to sample, ultimate compression strength is 56.32MPa.
Embodiment 5:
Precise metakaolin 5g and mud flying dust 15g, and pour in cement mortar mixer.Be the NaOH of 25% by the per-cent with raw materials quality and be mixed and made into alkali-activator with the water glass that the per-cent of raw materials quality is 12.5% and be dissolved in certain water gaging, water-solid ratio is 0.57, then the alkali-activator aqueous solution is joined the slurry stirring into together with raw material in cement mortar mixer and mix; Slurry is injected the cylindrical die of d=20.20mm, add 12MPa pressure compaction, obtain shaping sample, the demoulding; By sample at room temperature maintenance 7d; After reaching the length of time, utilize Universal motor to carry out intensity test to sample, ultimate compression strength is 60.23MPa.
Embodiment 6:
Precise metakaolin 10g and mud bottom ash 10g, and pour in cement mortar mixer.Be the NaOH of 12.8% by the per-cent with raw materials quality and be mixed and made into alkali-activator with the water glass that the per-cent of raw materials quality is 12.5% and be dissolved in certain water gaging, water-solid ratio is 0.57, then the alkali-activator aqueous solution is joined the slurry stirring into together with raw material in cement mortar mixer and mix; Slurry is injected the cylindrical die of d=20.20mm, add 12MPa pressure compaction, obtain shaping sample, the demoulding; By sample at room temperature maintenance 7d; After reaching the length of time, utilize Universal motor to carry out intensity test to sample, ultimate compression strength is 22.09MPa.
Embodiment 7:
Precise metakaolin 10g and mud bottom ash 10g, and pour in cement mortar mixer.Be the NaOH of 25% by the per-cent with raw materials quality and be mixed and made into alkali-activator with the water glass that the per-cent of raw materials quality is 12.5% and be dissolved in certain water gaging, water-solid ratio is 0.57, then the alkali-activator aqueous solution is joined the slurry stirring into together with raw material in cement mortar mixer and mix; Slurry is injected the cylindrical die of d=20.20mm, add 12MPa pressure compaction, obtain shaping sample, the demoulding.By sample at room temperature maintenance 7d; After reaching the length of time, utilize Universal motor to carry out intensity test to sample, ultimate compression strength is 38.96MPa.
Embodiment 8:
Precise metakaolin 10g and mud bottom ash 10g, and pour in cement mortar mixer.Be the NaOH of 35% by the per-cent with raw materials quality and be mixed and made into alkali-activator with the water glass that the per-cent of raw materials quality is 12.5% and be dissolved in certain water gaging, water-solid ratio is 0.57, then the alkali-activator aqueous solution is joined the slurry stirring into together with raw material in cement mortar mixer and mix; Slurry is injected the cylindrical die of d=20.20mm, add 12MPa pressure compaction, obtain shaping sample, the demoulding.By sample at room temperature maintenance 7d; After reaching the length of time, utilize Universal motor to carry out intensity test to sample, ultimate compression strength is 27.31MPa.
Claims (2)
1. utilize sludge ash to prepare a method for geopolymer, it is characterized in that, comprise the following steps:
Step 1: taking mud flying dust and metakaolin or mud bottom ash and metakaolin is raw material, and is placed in cement mortar mixer;
Step 2: be the NaOH of 12.8%-35% by the per-cent with raw materials quality and be mixed and made into alkali-activator with the water glass that the per-cent of raw materials quality is 12.5% and be dissolved in certain water gaging, water-solid ratio is 0.57, then the aqueous solution of alkali-activator is joined in cement mortar mixer, stir into the slurry mixed together with raw material;
Step 3: slurry is loaded in the cylindrical die of d=20.20mm, adopt pelleter to add 12MPa pressure compaction, shaping and demoulding, maintenance 7d under room temperature, makes sludge ash base geological polymer;
Step 4: utilize Universal motor to carry out intensity test to the sludge ash geopolymer sample under different condition.
2. a kind of method utilizing sludge ash to prepare geopolymer according to claim 1, it is characterized in that, the composition quality percentage ratio of described mud flying dust consists of: SiO
2: 40.9022%, Al
2o
3: 21.7987%, Fe
2o
3: 10.3797%, K
2o:3.0470%, Na
2o:0.88165%, MgO:1.5248%, impurity 21.466%; The composition quality percentage ratio of described mud bottom ash consists of: SiO
2: 54.9708%, Al
2o
3: 41.8081%, Fe
2o
3: 0.8923%, K
2o:0.2846%, MgO:0.0756%, impurity 1.97%; The composition quality percentage ratio of described metakaolin consists of SiO
2: 52.5%, Al
2o
3: 42.5%, CaO:0.1%, Fe
2o
3: 0.3%, MgO:0.1%, impurity 4.5%.
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| CN201510467757.6A CN105110663A (en) | 2015-07-31 | 2015-07-31 | Method for preparing geopolymer by using sludge ash |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106495512A (en) * | 2016-10-13 | 2017-03-15 | 沈阳航空航天大学 | A kind of sludge incineration flying dust base low alkalinity geology polymer material and preparation method thereof |
| CN106810090A (en) * | 2017-01-06 | 2017-06-09 | 哈尔滨工业大学深圳研究生院 | A kind of dregs geo-polymer curing materials and preparation method thereof |
| CN107500580A (en) * | 2017-09-26 | 2017-12-22 | 深圳大学 | A kind of method for realizing that heavy metal is efficiently fixed in sludge incineration residue by preparing geo-polymer |
| CN109400016A (en) * | 2018-09-29 | 2019-03-01 | 盐城工学院 | Geo-polymer porous insulation material and preparation method thereof based on burning city domestic garbage bottom ash |
| CN111217547A (en) * | 2020-01-16 | 2020-06-02 | 广东工业大学 | Graphene geopolymer material, and preparation method, application and regeneration method thereof |
| CN112573890A (en) * | 2020-12-01 | 2021-03-30 | 浙江工业大学 | Metakaolin compound and application thereof in preparation of pavement repair material |
| CN113135700A (en) * | 2021-04-22 | 2021-07-20 | 河南省交通规划设计研究院股份有限公司 | Solid waste base geopolymer mortar dry blend |
| CN116116379A (en) * | 2022-09-09 | 2023-05-16 | 沈阳航空航天大学 | Geopolymer adsorbent, preparation method and application thereof in heavy metal ion adsorption |
| CN116119980A (en) * | 2021-11-12 | 2023-05-16 | 李斌 | Cementing material of water supply plant sludge composite geopolymer and preparation method thereof |
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| CN1882516A (en) * | 2003-11-19 | 2006-12-20 | 洛可拉有限公司 | Geopolymer concrete and method of preparation and casting |
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| CN102557549A (en) * | 2012-03-09 | 2012-07-11 | 东华大学 | Method for stabilization of refuse incineration fly ash |
| CN102869633A (en) * | 2010-03-01 | 2013-01-09 | 电气化学工业株式会社 | Calcium ferroaluminate compound, cement admixture and process for producing same, and cement composition |
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2015
- 2015-07-31 CN CN201510467757.6A patent/CN105110663A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1882516A (en) * | 2003-11-19 | 2006-12-20 | 洛可拉有限公司 | Geopolymer concrete and method of preparation and casting |
| CN101012111A (en) * | 2007-02-05 | 2007-08-08 | 徐宇晴 | Method of preparing geopolymer material |
| CN102869633A (en) * | 2010-03-01 | 2013-01-09 | 电气化学工业株式会社 | Calcium ferroaluminate compound, cement admixture and process for producing same, and cement composition |
| CN102557549A (en) * | 2012-03-09 | 2012-07-11 | 东华大学 | Method for stabilization of refuse incineration fly ash |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106495512A (en) * | 2016-10-13 | 2017-03-15 | 沈阳航空航天大学 | A kind of sludge incineration flying dust base low alkalinity geology polymer material and preparation method thereof |
| CN106810090A (en) * | 2017-01-06 | 2017-06-09 | 哈尔滨工业大学深圳研究生院 | A kind of dregs geo-polymer curing materials and preparation method thereof |
| CN107500580A (en) * | 2017-09-26 | 2017-12-22 | 深圳大学 | A kind of method for realizing that heavy metal is efficiently fixed in sludge incineration residue by preparing geo-polymer |
| CN107500580B (en) * | 2017-09-26 | 2020-10-13 | 深圳大学 | Method for efficiently fixing heavy metals in sludge incineration residues by preparing geopolymer |
| CN109400016A (en) * | 2018-09-29 | 2019-03-01 | 盐城工学院 | Geo-polymer porous insulation material and preparation method thereof based on burning city domestic garbage bottom ash |
| CN111217547A (en) * | 2020-01-16 | 2020-06-02 | 广东工业大学 | Graphene geopolymer material, and preparation method, application and regeneration method thereof |
| CN111217547B (en) * | 2020-01-16 | 2022-05-10 | 广东工业大学 | Graphene geopolymer material, and preparation method, application and regeneration method thereof |
| CN112573890A (en) * | 2020-12-01 | 2021-03-30 | 浙江工业大学 | Metakaolin compound and application thereof in preparation of pavement repair material |
| CN113135700A (en) * | 2021-04-22 | 2021-07-20 | 河南省交通规划设计研究院股份有限公司 | Solid waste base geopolymer mortar dry blend |
| CN116119980A (en) * | 2021-11-12 | 2023-05-16 | 李斌 | Cementing material of water supply plant sludge composite geopolymer and preparation method thereof |
| CN116116379A (en) * | 2022-09-09 | 2023-05-16 | 沈阳航空航天大学 | Geopolymer adsorbent, preparation method and application thereof in heavy metal ion adsorption |
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Application publication date: 20151202 |