CN102584043A - Method for producing low-temperature cement clinker from straw ash - Google Patents
Method for producing low-temperature cement clinker from straw ash Download PDFInfo
- Publication number
- CN102584043A CN102584043A CN2012100307078A CN201210030707A CN102584043A CN 102584043 A CN102584043 A CN 102584043A CN 2012100307078 A CN2012100307078 A CN 2012100307078A CN 201210030707 A CN201210030707 A CN 201210030707A CN 102584043 A CN102584043 A CN 102584043A
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- cement
- low
- slag
- low heat
- 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
-
- 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
-
- 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 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 a method of utilizing stalk ash and slag and aluminium slag to produce a kind of new type low temperature cement clinker; Particularly generation current factory is utilized various plant stalks; The wet waste residue of doing as discharging behind the combustion power generations such as rice straw, straw, rice husk, cornstalk, soybean stalk, wooden tip bark is claimed the stalk ash; Adopt advanced technical matters that the stalk ash is produced a kind of new type low temperature cement clinker, and the method for a kind of harmless treatment of carrying out belong to environmental protection or cement field.
Background technology
See from domestic and international situation; Previously the development and use that begin the stalk ash in the flourishing country of the industry seventies are the U.S.; The research that has Japan, Australia, nz, India, Thailand etc. to study the stalk ash subsequently and be used for mixed cement and concrete adulterant had report, and utilization is about 60%.At present China to the stalk ash develop in building material product the research report still less, have volume that report is used to produce cement also seldom, have only about 3-5%, but there is the big technical problem of water regain in the stalk ash, because of the stalk ash itself contains a large amount of amorphous Si O
2If stalk ash self calcination reaction is incomplete, will change crystallization SiO in a large number into
2, so it has just influenced the quality of stalk ash, as be used for cement, can cause the cement water consumption too high, use and just receive certain restriction.When using this cement to make Commercial Concrete especially, water requirement is higher, will influence the work of the normal slump of concrete slurry, and a large amount of stalk ashes that use are difficult to accomplish in cement for this reason, and this is to be difficult to the one of the main reasons of utilization on a large scale.At present, China's annual stalk ash quantity discharged 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.
Along with the fast development of China's economy, a large amount of people in the countryside are concentrated to the city, and people in the countryside are just a large amount of to be reduced; Original people in the countryside are all utilized various straws; Wait to make a fire and cook like rice straw, straw, soybean stalk, cornstalk, rice husk, wooden tip bark, but the life in the countryside level has improved now, cooking all is with coal gas, liquefied gas; And in all abandoning afield original various plant stalks or the igniting incinerate; Done severe contamination like this atmospheric environment and water resources, till our country put into effect each item encouragement policies, resources conseravtion, save energy, protection environment, resource comprehensive utilize again.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 the stalk ash, and the stalk ash of being discharged contains the SiO about 80%
2With other oxide compound of a small amount of part, damp grey water cut is about 25%, and stalk ash self combustion reactions is incomplete, will be with stalk ash amorphous Si O
2, be transformed into crystallization SiO in a large number
2Thereby it is unstable to have influenced stalk ash quality, as mixes and can 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 works better of concrete slurry, and the stalk ash is moist again and incorporation is few; Difficulty such as bring also for the cement production technique can't to implement, the development and use that make the stalk ash are difficulty very.Unemployed stalk 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 to air and water source, for using that the stalks ash provides that a kind of technology is advanced rationally, energy consumption is low in a large number, high efficiency, reduced investment, non-secondary pollution, helping the method for the stalk ash production low heat cement grog of environment protection to above-mentioned stalk ash.
Stalk of the present invention ash is produced the low heat cement grog, is to be main raw material(s) with the dry-wet stalk ash, is that subsidiary material are prepared from through special processes with slag and aluminium slag, and its working method comprises the steps:
1, a kind of method of stalk ash production low heat cement grog is characterized in that comprising the steps:
1) get the raw materials ready: starting material are stalk ash, slag and aluminium slag;
2) batching and balling-up; With the stalk ash is 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; In nodulizer, add the suitable quantity of water thorough mixing and stir after process the pellet output that diameter is 5～10mm, the material ball is subsequent use;
3) steam-cured and low temperature calcination: the material ball is at the uniform velocity sent in the oven dry rotary kiln,, promptly got the low heat cement grog through 100 ℃ of steam-cured and 400 ℃ of calcinings kiln discharge after totally 40 minutes;
4) grinding: the low heat cement grog is dropped in the pulverizer, and the adding proper amount of gypsum is levigate, promptly gets the cement of the low heat cement grog of stalk 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 inventionly be the master, be the cement of the auxilliary low heat cement grog of producing with slag and aluminium slag that with the stalk ash have the strength of cement height, the concrete consistency is good, wear resisting property is good, and hydration heat is low, microdilatancy, multifrequency nature such as freeze proof, corrosion-resistant.Its performance can compare favourably with the cement of Portland clinker.Its working method has also that technology is advanced rationally, energy consumption is low, high efficiency, reduced investment, non-secondary pollution, help advantage such as environment protection.Produce Portland cement with existing method and compare, reduced investment 80%, cement cost reduces by 60%, cuts down the consumption of energy 80%, reduces CO
2Quantity discharged 80%; So very have an optimistic view of with the application prospect of low heat cement grog in manufacture of cement of the inventive method production; Stalk ash and other industrial residue have been digested again in large quantities; Having reduced the pollution of environment, is again to meet national industrial policies industrial residue resource utilization cycling and reutilization more and the good method that turns waste into wealth that helps protecting Environmental policy.
Description of drawings
Fig. 1 is the structure picture of cement stone 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
Stalk of the present invention ash is produced the low heat cement grog, is to be main raw material(s) with the dry-wet stalk ash, is that subsidiary material are prepared from through special processes with slag and aluminium slag, and its working method comprises the steps:
1) get the raw materials ready: starting material are stalk ash, slag and aluminium slag; Said stalk ash uses various plant stalks such as rice straw, straw, rice husk, cornstalk, soybean stalk, wooden tip branch, bark to discharge as fuel combustion generating back for the power station the wet waste residue of doing is called the stalk ash; Used slag is the waste residue that Iron And Steel Plant discharge; The body refuse of behind washing magnetic separation control iron, discharging is again claimed 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 cut is about 40%, and pH value is less than 6.
2) batching and balling-up;
With the stalk ash is that 60 parts, slag are that 25 parts, aluminium slag are that 5 parts ratio is tentatively mixed by weight by weight by weight;
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 the stalk 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 the stalk 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 the stalk 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 the stalk 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 the stalk 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 the stalk 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 the stalk 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 the stalk 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 the stalk ash;
The ratio that is about to the stalk ash and is by weight 60～70 parts, slag and be by weight 25～30 parts, aluminium slag and be by weight 5～10 parts is after preliminary the mixing; In nodulizer, add the suitable quantity of water thorough mixing and stir after process the pellet output that diameter is 5～10mm, the material ball is subsequent use;
3) steam-cured and low temperature calcination: the material ball is at the uniform velocity sent in the oven dry rotary kiln,, promptly got the low heat cement grog through 100 ℃ of steam-cured and 400 ℃ of calcinings kiln discharge after totally 40 minutes;
4) grinding: the low heat cement grog is dropped in the pulverizer, and the adding proper amount of gypsum is levigate, promptly gets the cement of the low heat cement grog of stalk ash.
The cement of the low heat cement grog with stalk 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, 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 ultra mixing of its mixed cement performance.
The 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 like the present invention who mixes part at Portland cement, the quality before can making that mixed Portland cement performance is far ultra and mixing, its properties of sample test result is as shown in table 2.
The 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 like the present invention who in complex cement, mixes part, the quality before can making that the complex cement performance is far ultra and mixing, its properties of sample test result is as shown in table 3.
The 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 like the present invention who in slag cement, mixes part, the quality before can making that Properties of Slag Cement is far ultra and mixing, its properties of sample test result is as shown in table 4.
The 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 like the present invention who in pulverized fuel ash cement, mixes part, the quality before can making that the pulverized fuel ash cement performance is far ultra and mixing, its properties of sample test result is as shown in table 5.
The 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 the quality of other kind cement with other kind cement mixing.
For the further cement performance of understanding the low heat cement grog of the inventive method production, existing is that example comparative analysis further with it is following with the Portland cement: 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 stalk ash
2With effective CaO in the slag and the effective Al in the aluminium slag
2O
3Composition organically combine, synthetic through low temperature, with the big and incomplete crystallization SiO of combustion reactions of original stalk ash water-absorbent
2, be transformed into the SiO of effective metamict at once
2With even particle of the same size is ultimate particle, loose adhesive aggregation, and form the hole of a large amount of nanostructures.Be the SiO of this nanostructure
2Keep metamict constant, the vitreum that changes structure in the slag material simultaneously is dissolved in unbodied SiO
2, make ionic concn increase the hole that gets into the slag network structure, interact with active positively charged ion; Promote the 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 attaching Fig. 1 and 2, by the cement stone aquation of the visible low heat cement grog of Fig. 1 in the time of 28 days compact structure and evenly, and structure porous and the heterogeneity of ortho-water mudstone aquation in the time of 28 days; Can obviously see big hole, as shown in Figure 2, these big holes are weakest links of cement stone; And the low heat cement grog can obviously improve the pore structure of cement, and this performance mainly is to be the combination of raw material with stalk ash with slag and aluminium slag, after heating; Activation in various degree makes the vitreum of low heat cement grog internal structure become loose, promotes 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 raising cement stone and concrete strength has good reinforced effects.
Claims (2)
1. the method that the stalk ash is produced the low heat cement grog is characterized in that comprising the steps:
1) get the raw materials ready: starting material are stalk ash, slag and aluminium slag;
2) batching and balling-up: with the stalk ash is 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; In nodulizer, add the suitable quantity of water thorough mixing and stir after process the pellet output that diameter is 5～10mm, the material ball is subsequent use;
3) steam-cured and low temperature calcination: the material ball is at the uniform velocity sent in the oven dry rotary kiln,, promptly got the low heat cement grog through 100 ℃ of steam-cured and 400 ℃ of calcinings kiln discharge after totally 40 minutes;
4) grinding: the low heat cement grog is dropped in the pulverizer, and the adding proper amount of gypsum is levigate, promptly gets the cement of the low heat cement grog of stalk ash.
2. the cement of the alternative Portland clinker of cement of the low heat cement grog produced of method and other kind cement mixing and improve the quality of other kind cement according to claim 1.
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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102584043A true CN102584043A (en) | 2012-07-18 |
| CN102584043B CN102584043B (en) | 2013-04-17 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100307078A Expired - Fee Related CN102584043B (en) | 2012-02-13 | 2012-02-13 | Method for producing low-temperature cement clinker from straw ash |
Country Status (2)
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|---|---|
| CN (1) | CN102584043B (en) |
| WO (1) | WO2013120241A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013120241A1 (en) * | 2012-02-13 | 2013-08-22 | 滨海仁舟水泥有限公司 | Method for producing low-temperature cement clinker by using straw ash |
| CN103936308A (en) * | 2014-04-22 | 2014-07-23 | 江苏省建筑材料研究设计院有限公司 | Method for stimulating early hydration activity of cement steel slags |
| CN104016603A (en) * | 2014-06-27 | 2014-09-03 | 淮安市楚城水泥有限公司 | Preparation method of industrial waste residue mixed ore powder |
| CN104844051A (en) * | 2015-04-01 | 2015-08-19 | 淮安市楚城水泥有限公司 | Cement grinding aid and preparation method therefor |
| CN109020424A (en) * | 2018-08-30 | 2018-12-18 | 河北建筑工程学院 | Novel masonry mortar and preparation method based on solid waste |
| 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 |
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| 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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|---|---|---|---|---|
| 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 |
-
2012
- 2012-02-13 CN CN2012100307078A patent/CN102584043B/en not_active Expired - Fee Related
- 2012-10-30 WO PCT/CN2012/001470 patent/WO2013120241A1/en active Application Filing
Patent 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 |
| 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 |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013120241A1 (en) * | 2012-02-13 | 2013-08-22 | 滨海仁舟水泥有限公司 | Method for producing low-temperature cement clinker by using straw ash |
| CN103936308A (en) * | 2014-04-22 | 2014-07-23 | 江苏省建筑材料研究设计院有限公司 | Method for stimulating early hydration activity of cement steel slags |
| CN104016603A (en) * | 2014-06-27 | 2014-09-03 | 淮安市楚城水泥有限公司 | Preparation method of industrial waste residue mixed ore powder |
| 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 |
| CN104844051A (en) * | 2015-04-01 | 2015-08-19 | 淮安市楚城水泥有限公司 | Cement grinding aid and preparation method therefor |
| CN109020424A (en) * | 2018-08-30 | 2018-12-18 | 河北建筑工程学院 | Novel masonry mortar and preparation method based on solid waste |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013120241A1 (en) | 2013-08-22 |
| CN102584043B (en) | 2013-04-17 |
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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 |