CN102584043B - Method for producing low-temperature cement clinker from straw ash - Google Patents
Method for producing low-temperature cement clinker from straw ash Download PDFInfo
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- CN102584043B CN102584043B CN2012100307078A CN201210030707A CN102584043B CN 102584043 B CN102584043 B CN 102584043B CN 2012100307078 A CN2012100307078 A CN 2012100307078A CN 201210030707 A CN201210030707 A CN 201210030707A CN 102584043 B CN102584043 B CN 102584043B
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- cement
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- straw ash
- slag
- cement clinker
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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
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
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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
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/28—Cements from oil shales, residues or waste other than slag from combustion residues, e.g. ashes or slags from waste incineration
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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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- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a method for producing low-temperature cement clinker from straw ash, which mainly comprises the following steps of: feed preparation, burdening, pelletizing, steam curing, low-temperature calcining, grinding and the like. Cement of the low-temperature cement clinker, which can be comparable to the cement of Portland cement clinker, is produced by taking dry and wet straw ash as a main raw material and steel slag and aluminum slag as auxiliary materials, and the cement of the low-temperature cement clinker has various characteristics of high cement strength, high concrete compatibility, good abrasion resistance, low hydration heat, minimum inflation, freezing resistance, corrosion resistance and the like. The low-temperature cement clinker can be directly used for engineering construction of dams, underwater constructions, roads, bridges, civil constructions and the like. The method for producing the low-temperature cement clinker from the straw ash also has the advantages of simple and reasonable process, low energy consumption, high benefit, investment saving, no secondary pollution, environmental protection and the like. Compared with regular cement produced by traditional methods, the investment is saved by 80 percent, the cement cost is reduced by 60 percent, the energy consumption is reduced by 80 percent, the carbon dioxide emission is reduced by 80 percent, the straw ash and other industrial waste residues can be largely digested, and the environmental pollution is reduced. The method for producing the low-temperature cement clinker from the straw ash is a good method which is favor of protecting environment and is capable of turning waste into wealth.
Description
Technical field
The present invention is the method for utilizing straw ash and slag and aluminium slag to produce a kind of New Type of Cement Calcined At Low Temperature grog; particularly generation current factory is utilized various plant stalks; claim straw ash such as the wet waste residue of doing of discharging behind the combustion power generations such as rice straw, straw, rice husk, cornstalk, soybean stalk, wooden tip bark; adopt advanced technical matters that straw ash is produced a kind of New Type of Cement Calcined At Low Temperature grog; and the method for a kind of harmless treatment of carrying out belongs to environmental protection or cement field.
Background technology
From domestic and international situation, previously the development and use that begin straw ash in the flourishing country of the industry seventies are the U.S., have subsequently Japan, Australia, New Zealand, India, Thailand etc. to study straw ash and also for the research of mixed cement and concrete adulterant report was arranged, utilization is about 60%.At present China to straw ash develop in building material product the research report still less, have report for the production of the volume of cement also seldom, only have about 3-5%, but there is the large technical problem of water regain in straw ash, because straw ash itself contains a large amount of amorphous Si O
2If straw ash self calcination reaction is incomplete, will change in a large number crystallization SiO into
2, so it has just affected the quality of straw ash, as being used for cement, can cause the cement water consumption too high, uses just to be subject to certain restrictions.When making Commercial Concrete with this cement especially, water requirement is higher, will affect the work of the normal slump of concrete slurry, and a large amount of straw ashs that use are difficult to accomplish in cement for this reason, and this is to be difficult to the extensive one of the main reasons of utilizing.At present, the annual straw ash quantity discharged of China is about 8,000 ten thousand tons, and utilization ratio can only utilize a large amount of farmlands to stack and landfill less than 10%, severe contamination environment.
Fast development along with China's economy; a large amount of people in the countryside are concentrated to the city; people in the countryside are a large amount of the minimizing just; original people in the countryside are all utilized various straws; such as rice straw; straw; soybean stalk; cornstalk; rice husk; wood tip bark etc. makes a fire and cooks; but present life in the countryside the level rise; cook all is to use coal gas; liquefied gas; and in all abandoning original various plant stalks afield or the igniting incinerate; done severe contamination like this atmospheric environment and water resources; till our country put into effect every encouragement policies, resources conseravtion; save energy; protection of the environment; the resource comprehensive recycling.After China had many power station to utilize various straws to come combustion power generation at present, the dried wet waste residue of discharge was referred to as straw ash, and the straw ash of discharging contains the SiO about 80%
2With other oxide compound of a small amount of part, damp grey water content is about 25%, and straw ash self combustion reactions is incomplete, will be with straw ash amorphous Si O
2, be transformed in a large number crystallization SiO
2Thereby it is unstable to have affected the straw ash quality, as mix and to cause the cement water requirement too high in the cement, use and just be restricted, the cement water requirement is too high, will cause the slump normal operation of concrete slurry, and straw ash is moist and incorporation is few again, the difficulty such as bring also for the cement production technique can't to implement, make the development and use of straw ash very difficult.Unemployed straw ash can only be stacked landfill, waste water, the Heisui River of meeting after the rainy day drenches are stayed into the riverbed, severe contamination water resources, the dry ash when fine is met wind one, and to blow dust all over the sky pitch-black, severe contamination atmospheric environment, so also be to use stalk to make one of the main evil in the power station of fuel.
Summary of the invention
The objective of the invention is to cause the problem of severe contamination for above-mentioned straw ash to air and water source, for using that straw ashs provide that a kind of technique is advanced rationally, energy consumption is low in a large number, high efficiency, reduced investment, non-secondary pollution, being conducive to the method for the producing low-temperature cement clinker from straw ash of environment protection.
Producing low-temperature cement clinker from straw ash of the present invention is take the dry-wet stalk ash as main raw material(s), is prepared from through special processes take slag and aluminium slag as subsidiary material, and its production method comprises the steps:
1, a kind of method of producing low-temperature cement clinker from straw ash is characterized in that comprising the steps:
1) get the raw materials ready: starting material are straw ash, slag and aluminium slag;
2) batching and balling-up; Be that 60～70 parts, slag are that 25～30 parts, aluminium slag are that 5～10 parts ratio is after preliminary the mixing by weight by weight by weight with straw ash, in nodulizer, add suitable quantity of water fully mix and stir after make the pellet output that diameter is 5～10mm, it is for subsequent use to get the material ball;
3) steam-cured and low temperature calcination: the material ball is at the uniform velocity sent in the oven dry rotary kiln, through 100 ℃ of steam-cured and 400 ℃ of calcinings kiln discharge after totally 40 minutes, namely got the low heat cement grog;
4) grinding: the low heat cement grog is dropped in the pulverizer, and the adding proper amount of gypsum is levigate, namely gets the cement of the low heat cement grog of straw ash.
The cement of the alternative Portland clinker of cement of the low heat cement grog of aforesaid method production and other kind cement mixing and improve the quality of other kind cement.
Of the present invention take straw ash as main, take slag and aluminium slag as the cement of the low heat cement grog of auxiliary production, have the strength of cement height, the concrete consistency is good, wear resisting property is good, hydration heat is low, microdilatancy, the multifrequency nature such as freeze proof, corrosion-resistant.Its performance can compare favourably with the cement of Portland clinker.Its production method has also that technique is advanced rationally, energy consumption is low, high efficiency, reduced investment, non-secondary pollution, be conducive to the advantage such as environment protection.Produce Portland cement with existing method and compare, reduced investment 80%, cement cost reduces by 60%, reduces energy consumption 80%, reduces CO
2Quantity discharged 80%; so very good with the application prospect of low heat cement grog in manufacture of cement that the inventive method is produced; straw ash and other industrial residue have been digested in large quantities again; having reduced the pollution of environment, is again the good method that turns waste into wealth that more meets national industrial policies industrial residue resource recycling recycling and be conducive to the protection of the environment policy.
Description of drawings
Fig. 1 is the structure picture of Behavior of Hardened Cement Paste aquation in the time of 28 days of low heat cement grog of the present invention;
Fig. 2 is the structure picture of ortho-water mudstone aquation in the time of 28 days.
Embodiment
Producing low-temperature cement clinker from straw ash of the present invention is take the dry-wet stalk ash as main raw material(s), is prepared from through special processes take slag and aluminium slag as subsidiary material, and its production method comprises the steps:
1) get the raw materials ready: starting material are straw ash, slag and aluminium slag; Described straw ash is that the power station is that the rear wet waste residue of doing of discharging of fuel combustion generating is called straw ash with various plant stalks such as rice straw, straw, rice husk, cornstalk, soybean stalk, wooden tip branch, barks, used slag is the waste residue that Steel Plant discharge, the body refuse of discharging behind washing magnetic separation control iron again claims slag, wherein contain CaO 50%, moisture is about 8%; The aluminium slag is that the chemical plant produces the waste residue that Tai-Ace S 150 is discharged, and contains A
2O
3About 15%, water content is about 40%, and pH value is less than 6.
2) batching and balling-up;
Be that 60 parts, slag are that 25 parts, aluminium slag are that 5 parts ratio is tentatively mixed by weight by weight by weight with straw ash;
Or be that 60 parts, slag are that 30 parts, aluminium slag are that 10 parts ratio is tentatively mixed by weight by weight by weight with straw ash;
Or be that 65 parts, slag are that 30 parts, aluminium slag are that 5 parts ratio is tentatively mixed by weight by weight by weight with straw ash;
Or be that 65 parts, slag are that 30 parts, aluminium slag are that 10 parts ratio is tentatively mixed by weight by weight by weight with straw ash;
Or be that 65 parts, slag are that 25 parts, aluminium slag are that 10 parts ratio is tentatively mixed by weight by weight by weight with straw ash;
Or be that 65 parts, slag are that 25 parts, aluminium slag are that 5 parts ratio is tentatively mixed by weight by weight by weight with straw ash;
Or be that 70 parts, slag are that 25 parts, aluminium slag are that 5 parts ratio is tentatively mixed by weight by weight by weight with straw ash;
Or be that 70 parts, slag are that 25 parts, aluminium slag are that 10 parts ratio is tentatively mixed by weight by weight by weight with straw ash;
Or be that 70 parts, slag are that 30 parts, aluminium slag are that 5 parts ratio is tentatively mixed by weight by weight by weight with straw ash;
Or be that 70 parts, slag are that 30 parts, aluminium slag are that 10 parts ratio is tentatively mixed by weight by weight by weight with straw ash;
Be about to straw ash and be by weight 60～70 parts, slag and be by weight 25～30 parts, aluminium slag and be by weight 5～10 parts ratio after preliminary the mixing, in nodulizer, add suitable quantity of water fully mix and stir after make the pellet output that diameter is 5～10mm, it is for subsequent use to get the material ball;
3) steam-cured and low temperature calcination: the material ball is at the uniform velocity sent in the oven dry rotary kiln, through 100 ℃ of steam-cured and 400 ℃ of calcinings kiln discharge after totally 40 minutes, namely got the low heat cement grog;
4) grinding: the low heat cement grog is dropped in the pulverizer, and the adding proper amount of gypsum is levigate, namely gets the cement of the low heat cement grog of straw ash.
The cement of the low heat cement grog with straw ash of the present invention has the strength of cement height, and the concrete consistency is good, and wear resisting property is good, and hydration heat is low, microdilatancy, the multifrequency nature such as freeze proof, corrosion-resistant.Its performance can compare favourably with the cement of Portland clinker, and its properties of sample and mixed cement the performance test results thereof are as shown in table 1.Quality before the far super mixing of its mixed cement performance.
The performance test results of the cement of table 1, low heat cement grog and Portland clinker cement and mixed cement thereof
The cement of the alternative Portland clinker of cement of the low heat cement grog of producing with the present invention and other kind cement mixing and the quality of other kind cement of obviously improving.
The cement of the low heat cement grog of producing such as the present invention who mixes part at Portland cement can make the far quality before super the mixing of mixed Portland cement performance, and its properties of sample test result is as shown in table 2.
The performance test results of the cement of table 2, low heat cement grog and Portland cement and mixed cement thereof
The cement of the low heat cement grog of producing such as the present invention who mixes part in complex cement can make the far quality before super the mixing of complex cement performance, and its properties of sample test result is as shown in table 3.
The performance test results of the cement of table 3, low heat cement grog and complex cement and mixed cement thereof
The cement of the low heat cement grog of producing such as the present invention who mixes part in slag cement can make the far quality before super the mixing of Properties of Slag Cement, and its properties of sample test result is as shown in table 4.
The performance test results of the cement of table 4, low heat cement grog and blast furnace cement and mixed cement thereof
The cement of the low heat cement grog of producing such as the present invention who mixes part in pulverized fuel ash cement can make the far quality before super the mixing of property of fly ash cement, and its properties of sample test result is as shown in table 5.
The performance test results of the cement of table 5, low heat cement grog and pulverized fuel ash cement and mixed cement thereof
In sum, the cement of the low heat cement grog that the inventive method is produced, the cement of alternative Portland clinker uses, and also can improve with other kind cement mixing the quality of other kind cement.
For the further cement performance of understanding the low heat cement grog of the inventive method production, now comparative analysis further with it is as follows as an example of Portland cement example: its chemical ingredients and Portland cement content are as shown in table 6.
Table 6: the cement of low heat cement grog and the chemical component table of Portland cement
| Title | SiO 2 | Al 2O 3 | CaO | Fe 2O 3 | SO 3 |
| The low temperature cement clinker | 64.18 | 5.86 | 20.62 | 3.78 | 2.42 |
| Portland cement | 24.79 | 5.13 | 62.09 | 3.95 | 2.16 |
From table 6, see the SiO in the cement of low heat cement grog
2The SiO of content in the Portland cement
2Content.
Because a large amount of amorphous Si O in the straw ash
2With effective CaO in the slag and the effective Al in the aluminium slag
2O
3Composition organically combine, synthetic by low temperature, the large and incomplete crystallization SiO of combustion reactions with original straw ash water-absorbent
2, be transformed at once the SiO of effective metamict
2Take even particle of the same size as ultimate particle, loose adhesive aggregation, and form the hole of a large amount of nanostructures.The SiO of this nanostructure
2Keep metamict constant, the vitreum that changes simultaneously structure in the slag material is dissolved in unbodied SiO
2, make the ionic concn increase enter the hole of slag network structure, with the positively charged ion interaction of activity, promote decomposition and the dissolving of slag, and produced very high activity, formed huge specific surface area, improve the low heat cement clinker strength, changed hydrated cementitious speed and hydrated cementitious performance.
Referring to attached Fig. 1 and 2, as seen from Figure 1 the Behavior of Hardened Cement Paste aquation of low heat cement grog in the time of 28 days compact structure and evenly, and ortho-water mudstone aquation in the time of 28 days the structure porous and heterogeneity, can obviously see large hole, as shown in Figure 2, these large holes are weakest links of Behavior of Hardened Cement Paste, and the low heat cement grog can obviously improve the pore structure of cement, this performance mainly is the combination take straw ash and slag and aluminium slag as raw material, after heating, activation in various degree makes the vitreum of low heat cement grog internal structure become loose, promote mutual physicochemical change, make the raw material of raw material become grog, activation capacity increases, and makes the space that has produced a large amount of nanoparticles in the low heat cement grog, this nanometer gap structure has improved the chemical activation ability, thereby by the amorphous Si O of nanoparticle
2, CaO, Al
2O
3Therefore adhesive aggregation becomes the nanometer level microporous of short texture together, has played the raising Behavior of Hardened Cement Paste and concrete strength has good reinforced effects.
Claims (1)
1. the method for a producing low-temperature cement clinker from straw ash is characterized in that comprising the steps:
1) get the raw materials ready: starting material are straw ash, slag and aluminium slag;
2) batching and balling-up: be that 60～70 parts, slag are that 25～30 parts, aluminium slag are after 5～10 parts ratio is tentatively mixed by weight by weight by weight with straw ash, in nodulizer, add suitable quantity of water fully mix and stir after make the pellet output that diameter is 5～10mm, it is for subsequent use to get the material ball;
3) steam-cured and low temperature calcination: the material ball is at the uniform velocity sent in the oven dry rotary kiln, through 100 ℃ of steam-cured and 400 ℃ of calcinings kiln discharge after totally 40 minutes, namely got the low heat cement grog;
4) grinding: the low heat cement grog is dropped in the pulverizer, and the adding proper amount of gypsum is levigate, namely gets the cement of the low heat cement grog of straw ash.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100307078A CN102584043B (en) | 2012-02-13 | 2012-02-13 | Method for producing low-temperature cement clinker from straw ash |
| PCT/CN2012/001470 WO2013120241A1 (en) | 2012-02-13 | 2012-10-30 | Method for producing low-temperature cement clinker by using straw ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100307078A CN102584043B (en) | 2012-02-13 | 2012-02-13 | Method for producing low-temperature cement clinker from straw ash |
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| Publication Number | Publication Date |
|---|---|
| CN102584043A CN102584043A (en) | 2012-07-18 |
| CN102584043B true CN102584043B (en) | 2013-04-17 |
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| WO (1) | WO2013120241A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102584043B (en) * | 2012-02-13 | 2013-04-17 | 淮安市楚城水泥有限公司 | Method for producing low-temperature cement clinker from straw ash |
| CN103936308B (en) * | 2014-04-22 | 2016-01-20 | 江苏省建筑材料研究设计院有限公司 | Excite the method for the slag early hydration activity for the production of cement |
| CN104016603B (en) * | 2014-06-27 | 2016-04-06 | 淮安市楚城水泥有限公司 | The preparation method of industrial residue formula mixed mineral powder |
| CN104844051B (en) * | 2015-04-01 | 2017-06-06 | 淮安市水泥厂有限公司 | A kind of cement grinding aid and preparation method thereof |
| CN109020424B (en) * | 2018-08-30 | 2021-08-13 | 河北建筑工程学院 | Novel masonry mortar based on solid waste and preparation method thereof |
| CN110028257A (en) * | 2019-05-09 | 2019-07-19 | 滨海金尼环保科技有限公司 | A kind of preparation method using epoxy resin powder production low heat cement |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101012120A (en) * | 2007-01-10 | 2007-08-08 | 谢涛 | Ecological inorganic composite architectural materials |
| CN201280768Y (en) * | 2008-09-22 | 2009-07-29 | 马俊杰 | Thermal insulation wall using stalk building block as main body |
| CN101619608A (en) * | 2008-07-04 | 2010-01-06 | 胡明生 | Light heat-insulating cement wall panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1103856A (en) * | 1994-09-22 | 1995-06-21 | 范茂潮 | Method for producing cement by using garbage as raw material |
| CN101844883A (en) * | 2010-01-28 | 2010-09-29 | 汪超 | Novel composite ecological cement and product application thereof |
| CN102584043B (en) * | 2012-02-13 | 2013-04-17 | 淮安市楚城水泥有限公司 | Method for producing low-temperature cement clinker from straw ash |
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- 2012-10-30 WO PCT/CN2012/001470 patent/WO2013120241A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101012120A (en) * | 2007-01-10 | 2007-08-08 | 谢涛 | Ecological inorganic composite architectural materials |
| CN101619608A (en) * | 2008-07-04 | 2010-01-06 | 胡明生 | Light heat-insulating cement wall panel |
| CN201280768Y (en) * | 2008-09-22 | 2009-07-29 | 马俊杰 | Thermal insulation wall using stalk building block as main body |
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| WO2013120241A1 (en) | 2013-08-22 |
| CN102584043A (en) | 2012-07-18 |
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Address after: 223211 Chuzhou new energy industrial park, Huaian, Jiangsu Patentee after: Huaian Cement Factory Co.,Ltd. Patentee after: Tan Jilin Address before: 223211 Chuzhou new energy industrial park, Huaian, Jiangsu Patentee before: HUAIAN CHUCHENG CEMENT Co.,Ltd. Patentee before: Tan Jilin |
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Granted publication date: 20130417 Termination date: 20220213 |