CN104310820A - Method for preparing sulfoaluminate cement clinker by using five-component mineral phase system - Google Patents
Method for preparing sulfoaluminate cement clinker by using five-component mineral phase system Download PDFInfo
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- CN104310820A CN104310820A CN201410532393.0A CN201410532393A CN104310820A CN 104310820 A CN104310820 A CN 104310820A CN 201410532393 A CN201410532393 A CN 201410532393A CN 104310820 A CN104310820 A CN 104310820A
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- China
- Prior art keywords
- cement clinker
- cao
- minutes
- al2o3
- gypsum
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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
- Y02P40/121—Energy efficiency measures, e.g. improving or optimising the production methods
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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
Abstract
The invention relates to a method for preparing sulfoaluminate cement clinker by using a five-component mineral phase system. The alite-sulphoaluminate cement clinker is prepared by using a CaO-SiO2-Al2O3-Fe2O3-SO3 multicomponent system under the condition of not adding fluorite. The method comprises the following steps: (1) achieving the conditions that the basicity factor [(CaO+MgO)/(SiO2+Al2O3)] is 1.42 and the aluminum and sulfur ratio Al2O3/SO3 is 1.73; (2) uniformly mixing and tabletting 75-80% of limestones, 5-7% of sandstones, 1-2% of coal ash, 6-10% of low-grade bauxite and 5-8% of gypsum, putting in a high-temperature furnace and sintering; and (3) insulating at 950 DEG C in a low-temperature furnace for 30 minutes, directly transferring to a high-temperature furnace at 1450 DEG C, insulating for 40 minutes, cooling along with the furnace to 1300 DEG C, insulating for 40 minutes, and cooling to room temperature after taking for 30 minutes to room temperature so as to obtain the CaO-SiO2-Al2O3-Fe2O3-SO3 multicomponent system cement clinker with coexisting C3S and C4A3S. The cement clinker has the advantages of high early strength and no shrinkage of long-term strength.
Description
Invention field
The present invention relates to one and utilize CaO-SiO
2-Al
2o
3-Fe
2o
3-SO
3multicomponent system fires the preparation method of alite-sulphoaluminate cement clinker.
Background technology
Cement industry is the energy, resource consumption intensive industry, is demand on ore amount, CO
2discharge one of larger key industry, along with becoming increasingly conspicuous of environmental problem, China pays much attention to energy-saving and emission-reduction work, and reduces the energy expenditure in cement production process, reduces Carbon emission, significant for energy-saving and emission-reduction.Reduction of discharging is mainly reflected in and reduces CaCO
3consumption, energy-conservation mainly referring to reduces clinker burning temperature, reduces ore consumption, utilizes industrial residue to replace natural resources.And under the prerequisite ensureing energy-saving and emission-reduction, how preparing the good cement of performance is also that cement industry realizes one of problem that green building material will consider.
In multicomponent system, forefathers have prepared multiple high-performance cement, as belite sulphoaluminate cement.But utilize CaO-SiO
2-Al
2o
3-Fe
2o
3-SO
3it is less that Quinary system prepares its correlative study of ante-sulphoaluminate cement aspect, and this is owing to being difficult to realize C
3s-phase and
coexist mutually.Ordinary Portland cement and aluminosulfate cement combine by ante-sulphoaluminate cement, simultaneously containing C
3s-phase and
phase, it is on the low side that it not only solves ordinary Portland cement early strength, the problem that firing temperature is higher, also overcomes aluminosulfate cement later strength enhancement rate low simultaneously, even the shortcoming such as retraction; Due to C
3s-phase starts a large amount of formation at 1400 DEG C, and
1200 ~ 1300 DEG C of formation, starting during more than 1350 DEG C to decompose, coexisting to realize the two, in existing technology, usually adopt the method for adding fusing assistant and mineralizer to reduce C
3the formation temperature of S-phase, as realized C by adding fluorite
3s-phase and
coexist mutually.
Fluorite, as a kind of mineralizer, can reduce the sintering temperature of furnace charge, but fluorite hardness is lower, and property is crisp, and its hardness of concrete and the toughness that make to mix fluorite decline all to some extent; Simultaneously fluorite mix the generation adding many toxicity fluorochemicals such as HF, this causes very large harm to environment, and therefore under the condition of not adding fluorite, developing the constant ante-sulphoaluminate cement of performance is significantly.The present invention is not adding CaF
2condition under by first heat up formed C
3then S-phase is lowered the temperature and is again formed
phase, realizes C
3s-phase and
coexisting of phase, this has made tremendous contribution to the eco-friendly object of cement industry, is also few in the prior art simultaneously.
Temperature is first increased to 1450 DEG C to adopting in the dynamics research of ante-sulphoaluminate cement forming process by forefathers, then makes it be down to low temperature, continues to be heated to from low temperature
the scheme formed mutually, the program consumes a large amount of energy in preparation process, do not meet the requirement of cement industry energy-saving and emission-reduction, therefore the present invention is based on the basis of this dynamics research, after temperature is increased to 1450 DEG C, be directly cooled to 1300 DEG C, insulation 40min obtains ante-sulphoaluminate cement.Therefore this invention is not adopting fluorite, and reduce saving energy aspect significant, this result is for utilizing CaO-SiO simultaneously
2-Al
2o
3-Fe
2o
3-SO
3multicomponent system prepares ante-sulphoaluminate cement very large effect.
Summary of the invention
The present invention utilizes CaO-SiO
2-Al
2o
3-Fe
2o
3-SO
3multicomponent system prepares ante-sulphoaluminate cement under the condition of not adding fluorite, and mainly through to proportioning raw materials, the change of firing scheme realizes.This is prepared scheme and adopts the scheme of lowering the temperature afterwards that first heats up successfully to prepare target product, and target product Free CaO is lower simultaneously, and this has desirable influence to the stability in cement clinker later stage.
The present invention realizes by the following technical solutions:
The present invention utilizes Wingdale, sandstone, flyash, low-grade bauxite, and gypsum is as experiment starting material, carries out grinding, be less than 0.08mm to particle diameter to it; According to basicity factor [(CaO+MgO)/(SiO
2+ Al
2o
3)] (mass ratio) be 1.42, aluminium-sulfur ratio (mass ratio) Al
2o
3/ SO
3be 1.73 to prepare burden, test raw-material content by weight, comprising:
Wingdale 75 ~ 80%,
Sandstone 5 ~ 7%,
Flyash 1 ~ 2%,
Low-grade bauxite 6 ~ 10%, wherein Al
2o
3mass percent is 42.2 ~ 46.5%
Gypsum 5 ~ 7%.
In this technical scheme, fire as follows:
The first step: Wingdale, sandstone, flyash, low-grade bauxite and gypsum are mixed according to set proportioning, for subsequent use;
Second step: the distilled water mix raw material prepared being added raw material total mass 10% is even, the material then taking 5g is poured in tabletting machine and is pressed into little pat, and standby examination is burnt used;
3rd step: by the little pat that the suppresses low temperature oven insulation 30min at 950 DEG C, directly go in the High Temperature Furnaces Heating Apparatus of 1450 DEG C, insulation 40min, is cooled to 1300 DEG C with stove, and insulation 40min, is cooled to room temperature after taking out, obtains C in 30min
3s and
the CaO-SiO coexisted
2-Al
2o
3-Fe
2o
3-SO
3multicomponent system cement be who knows;
Ultimate principle:
C
3s-phase and
coexist principle mutually: under the condition of fluxless and mineralizer,
formation temperature be generally 1200 ~ 1300 DEG C, when more than 1350 DEG C,
start to decompose, higher than fast decoupled when 1400 DEG C, and C
3s is just formed in a large number at 1400 DEG C.By the dynamics research to ante-sulphoaluminate cement forming process, find along with temperature raises,
phase decomposition, but can again form this phase again when lowering the temperature.Therefore in order to realize C
3s-phase and
coexist, we adopt and are first warming up to 1450 DEG C, form C
3s-phase, is then cooled to 1300 DEG C with stove, is again formed
phase.
Embodiment
Embodiment 1: by the Wingdale of 78%, the sandstone of 6%, the flyash of 1.5%, the low-grade bauxite (Al of 8.5%
2o
3mass percent is 45.9%), and the gypsum of 6% mixes; The distilled water mix adding raw meal quality 10% is even, low temperature oven at 950 DEG C after making the oven dry of little pat is incubated 30min, directly go in the High Temperature Furnaces Heating Apparatus of 1450 DEG C, insulation 40min, be cooled to 1300 DEG C with stove, insulation 40min, is cooled to room temperature after taking out in 30min, under the condition of not adding fluorite, obtain C
3s and
the CaO-SiO coexisted
2-Al
2o
3-Fe
2o
3-SO
3multicomponent system cement clinker.To survey its 3d ultimate compression strength be 53.8MPa, 7d ultimate compression strength is 57.9MPa, and 28 days ultimate compression strength is 73.6MPa, and therefore to reach early strength high for grog, and later strength is without the effect of retraction.
Embodiment 2: by the Wingdale of 75%, the sandstone of 7%, the flyash of 2%, the low-grade bauxite (Al of 10%
2o
3mass percent is 42.2%), and the gypsum of 6% mixes; And the distilled water mix adding raw meal quality 10% is even, low temperature oven at 950 DEG C after making the oven dry of little pat is incubated 30min, directly go in the High Temperature Furnaces Heating Apparatus of 1450 DEG C, insulation 40min, be cooled to 1300 DEG C with stove, insulation 40min, is cooled to room temperature after taking out in 30min, under the condition of not adding fluorite, obtain C
3s and
the CaO-SiO coexisted
2-Al
2o
3-Fe
2o
3-SO
3multicomponent system cement clinker.Wherein C
3the content of S comparatively example 1 declines to some extent,
content then rise to some extent.To survey its 3d ultimate compression strength be 52.3MPa, 7d ultimate compression strength is 58.5MPa, and 28 days ultimate compression strength is 71.3MPa, and it is high that its grog reaches early strength, and later strength is without the effect of retraction.
Embodiment 3: by the Wingdale of 80%, the sandstone of 5%, the flyash of 1%, the low-grade bauxite (Al of 7%
2o
3mass percent is 46.5%), and the gypsum of 7% mixes; And the distilled water mix adding raw meal quality 10% is even, low temperature oven at 950 DEG C after making the oven dry of little pat is incubated 30min, directly go in the High Temperature Furnaces Heating Apparatus of 1450 DEG C, insulation 40min, be cooled to 1300 DEG C with stove, insulation 40min, is cooled to room temperature after taking out in 30min, under the condition of not adding fluorite, obtain C
3s and
the CaO-SiO coexisted
2-Al
2o
3-Fe
2o
3-SO
3multicomponent system cement clinker.Wherein C
3the content of S comparatively example 2 declines to some extent,
content then rise to some extent.To survey its 3d ultimate compression strength be 55.7MPa, 7d ultimate compression strength is 60.2MPa, and 28 days ultimate compression strength is 75.4MPa, and it is high that its grog reaches early strength, and later strength is without the effect of retraction.
Claims (3)
1. utilize five yuan of mineral facies systems to prepare a sulphoaluminate cement clinker, it is characterized in that: its raw material content by weight, comprising:
Wingdale 75 ~ 80%,
Sandstone 5 ~ 7%,
Flyash 1 ~ 2%,
Bauxitic clay 6 ~ 10%
Gypsum 5 ~ 7%.
2. one as claimed in claim 1 utilizes five yuan of mineral facies systems to prepare sulphoaluminate cement clinker, it is characterized in that: Al in bauxitic clay
2o
3mass percent is 42.2 ~ 46.5%.
3. preparation is a kind of as claimed in claim 1 utilizes five yuan of mineral facies systems to prepare the method for sulphoaluminate cement clinker, comprises the steps:
The first step: Wingdale, sandstone, flyash, bauxitic clay and gypsum are mixed by described proportioning, for subsequent use;
Second step: the distilled water mix raw material prepared being added raw meal quality 10% is even, the material then taking 5g is poured in tabletting machine and is pressed into little pat, and standby examination is burnt used;
3rd step: by the little pat that the suppresses low temperature oven insulation 30min at 950 DEG C, directly go in the High Temperature Furnaces Heating Apparatus of 1450 DEG C, insulation 40min, is cooled to 1300 DEG C with stove, and insulation 40min, is cooled to room temperature after taking out, obtains C in 30min
3s and
the CaO-SiO coexisted
2-Al
2o
3-Fe
2o
3-SO
3multicomponent system cement clinker.
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|---|---|---|---|
| CN201410532393.0A CN104310820B (en) | 2014-10-10 | 2014-10-10 | A kind of method utilizing five yuan of mineral facies systems to prepare sulphoaluminate cement clinker |
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|---|---|---|---|
| CN201410532393.0A CN104310820B (en) | 2014-10-10 | 2014-10-10 | A kind of method utilizing five yuan of mineral facies systems to prepare sulphoaluminate cement clinker |
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| CN104310820A true CN104310820A (en) | 2015-01-28 |
| CN104310820B CN104310820B (en) | 2016-08-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105621908A (en) * | 2016-01-11 | 2016-06-01 | 枣庄中联水泥有限公司 | Low sintering temperature, low energy consumption and high strength cement clinker |
| CN106630704A (en) * | 2017-01-04 | 2017-05-10 | 济南大学 | Belite-calcium sulphoaluminate cement clinker and preparation method thereof |
Citations (4)
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|---|---|---|---|---|
| CN101717209A (en) * | 2009-11-13 | 2010-06-02 | 南京工业大学 | Secondary synthesis method of calcium sulfoaluminate minerals in metasilicate cement clinker |
| WO2011158109A1 (en) * | 2010-06-18 | 2011-12-22 | Cemex Research Group Ag | Clinker and method for preparing a hydraulic cement with low co2 emission and high resistance |
| CN102936104A (en) * | 2012-10-31 | 2013-02-20 | 天津中材工程研究中心有限公司 | Method for preparing rapid hardening high-early-strength cement clinker |
| CN103232176A (en) * | 2013-04-19 | 2013-08-07 | 南京工业大学 | High-strength silicate cement clinker and preparation method thereof |
-
2014
- 2014-10-10 CN CN201410532393.0A patent/CN104310820B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101717209A (en) * | 2009-11-13 | 2010-06-02 | 南京工业大学 | Secondary synthesis method of calcium sulfoaluminate minerals in metasilicate cement clinker |
| WO2011158109A1 (en) * | 2010-06-18 | 2011-12-22 | Cemex Research Group Ag | Clinker and method for preparing a hydraulic cement with low co2 emission and high resistance |
| CN102936104A (en) * | 2012-10-31 | 2013-02-20 | 天津中材工程研究中心有限公司 | Method for preparing rapid hardening high-early-strength cement clinker |
| CN103232176A (en) * | 2013-04-19 | 2013-08-07 | 南京工业大学 | High-strength silicate cement clinker and preparation method thereof |
Non-Patent Citations (1)
| Title |
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| 曾祥熹等: "《钻孔护壁堵漏原理》", 30 June 1986 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105621908A (en) * | 2016-01-11 | 2016-06-01 | 枣庄中联水泥有限公司 | Low sintering temperature, low energy consumption and high strength cement clinker |
| CN106630704A (en) * | 2017-01-04 | 2017-05-10 | 济南大学 | Belite-calcium sulphoaluminate cement clinker and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN104310820B (en) | 2016-08-17 |
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