CN102249576A - Low-energy-consumption and low-emission cement and preparation method and application thereof - Google Patents
Low-energy-consumption and low-emission cement and preparation method and application thereof Download PDFInfo
- Publication number
- CN102249576A CN102249576A CN2011101212121A CN201110121212A CN102249576A CN 102249576 A CN102249576 A CN 102249576A CN 2011101212121 A CN2011101212121 A CN 2011101212121A CN 201110121212 A CN201110121212 A CN 201110121212A CN 102249576 A CN102249576 A CN 102249576A
- Authority
- CN
- China
- Prior art keywords
- cement
- parts
- raw material
- low
- weight
- 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.)
- Pending
Links
Images
Classifications
-
- 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
- C04B7/32—Aluminous cements
-
- 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
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses low-energy-consumption and low-emission cement and a preparation method and application thereof. Cement clinker mainly comprises the following minerals in parts by weight: 35-65 parts of C2S, 20-50 parts C4A3S and 5-15 parts of C4AF. A corresponding green stock consists of the following components in parts by weight: 30-60 parts of CaO, 25-35 parts of SiO, 5-35 parts of Al2O3, 1-6 parts of SO3 and 1-10 parts of Fe2O3. The cement clinker is a product which is prepared by calcining limestone, alumina and clay or sandstone and gypsum serving as raw materials at the temperature between 1,280 DEG C and 1,300 DEG C for 45-70 minutes by combining the advantages of low calcium content, low-temperature baking and high later strength of a belite mineral, low-temperature baking and high later strength of anhydrous calcium sulphoaluminate, and the like. The cement product has the advantages of excellent performance, low energy and resource consumption and low carbon dioxide emission, can play an important role in the field of construction, and has a wide application prospect.
Description
Technical field
The invention belongs to the cement products in the chemical field, particularly relate to the cement and preparation method thereof and application of a kind of low energy and resource consumption, low carbon dioxide emission.
Background technology
From 1824, since the portland cement invention, cement was the most large manufactured construction materials always, and will be the main material of construction of following 100-200, for significant contribution has been made in progress of human society and Economic development.Yet resource in the cement production process and energy consumption and greenhouse gas emission directly affect human existence and development again.China's cement output occupies first place, the world for several years running, and cement output reached 18.68 hundred million tons in 2010, accounted for half of the total cement output in the world, therefore realizes that the low energy, low consumption of resources and the low carbon development of cement industry are extremely urgent significant again.
Usually normal portland cement, calcium oxide content is about 66%, accounts for A Lite mineral (Alite, i.e. tricalcium silicate, the 3CaOSiO of 50-70% in its grog
2) about 1450 ℃ of formation temperature, these mineral contain calcium oxide and reach 73.7%.Under the prerequisite of not considering other thermosteresis, grog burn till hear rate mainly from two aspects: the one, the high temperature of clinker mineral (mainly being the A Lite mineral) forms; The 2nd, the decomposition of Wingdale in the raw material.It is estimated CaCO
3Decompose power consumption and account for about 46% of the theoretical hear rate of grog.Obviously, the basic reason of the general purpose portland cement grog high energy consumption of burning till is its high calcium mineral composition design.
As far back as 1980, the Mehta professor is at the 11st volume of " World Cement Technology ", the key that proposes the energy-conservation low emission cement of development of new in the 166-177 page or leaf of the 4th phase is on the basis of equal performance level, adopts less energy-consumption freezer compartment gaseous emission component to substitute high energy consumption maximum discharge component.
Comprehensive at present both at home and abroad for the present Research of energy-saving and emission-reduction cement, high belite cement, aluminosulfate cement and Belite-calcium barium sulphoaluminate cement are three kinds of main energy saving cement kinds.
China Building Material Scientific Research General Institute has been developed this low calcium high performance silicon acid salt cement-high belite cement in the enforcement period of the ninth five-year plan, and in the disclosed patent No. in 1998 patent " a kind of cement clinker and preparation technology thereof " that is CN1193613A, the grog system is C
2S (Baily spy)-C
3S (A Lite)-C
3A (tricalcium aluminate)-C
4AF (tetracalcium aluminoferrite), the weight percent of each mineral are C
2S:40-70%, C
3S:10-40%, C
3A:2-8%, C
4AF:10-25%, grog firing range are at 1300-1400 ℃, and its cement has advantages such as low hydration heat, high workability, high-durability and high later strength.Special mineral (the C of Baily
2S) amount of contained CaO is 65.1%, be lower than among the A Lite 73.7% CaO content, in addition, the special mineral of Baily are very fast in formation speed more than 1250 ℃, be lower than the formation temperature of 1450 ℃ of A Lite, and these mineral has excellent later strength performance, therefore, form the Baily spy and no matter be the calcium content analysis from it is formed, still all lack than A Lite from preparing required energy spectrometer.Compare with general purpose portland cement grog preparation, calcining can reduce firing temperature 100-150 ℃ with Baily specially for the cement clinker of guide mineral, and significantly reduces and burn till coal consumption, CO
2, SO
2And NO
xThe also corresponding minimizing of discharging.28 days intensity of high belite cement is suitable with ordinary Portland cement intensity, but because C
2The hydration rate of S is slower, and the early strength of high belite cement (3 days, 7 days) is on the low side, and its range of application is restricted.
Aluminosulfate cement is invented by China Building Material Scientific Research General Institute the seventies in 20th century as Tr row cement.In December, 1999 China architectural materials science is studied total institute and is write, and has discussed common sulphoaluminate cement clinker system essential mineral in the treatise of being published by press of Beijing University of Technology " aluminosulfate cement " and has consisted of C
2S:8-37%,
55-75%, C
4AF:3-10%, the firing temperature of grog are 1350 ± 50 ℃, its cement has good characteristics such as strong, high-strength, freeze proof, impervious, anti-erosion early and low basicity, simultaneously because one of its essential mineral
Middle CaO content low (36.8%) and formation temperature low (1300 ℃), and and C
2S equally has less energy-consumption and low CO
2The characteristics of discharging.But, because the raw material sources of its bauxitic clay and production cost is higher, later strength is not high, be difficult for time of coagulation regulating and factor such as expansion instability, its range of application is restricted.
The patent " Belite-calcium barium sulphoaluminate cement " that the disclosed patent No. in 2006 is CN1887766A, the clinker mineral system is: C
2S-
-C
3S-C
3A-C
4AF, the weight percent of each mineral is: C
2S:30-70%, CBAS:5-45%, C
3S:10-45%, C
3A:2-20%, C
4AF:2-20%, gained grog firing temperature is 1320-1360 ℃.Compare with high belite cement, introduced in this cement system
Mineral improve early strength, improve later strength, but owing to still have C in this cement clinker mineral component
3S, it need consume a large amount of high calcium raw materials and need form under comparatively high temps, thus the energy consumption that grog burns till is higher relatively.
Summary of the invention
The objective of the invention is on the basis of high belite cement to adjust the clinker mineral system, optimize the mineral composition coupling, a kind of high early strength is provided, the low energy of performance level that later strength reaches ordinary Portland cement with resource consumption, hang down CO
2Cement of discharging (being called for short less energy-consumption, low emission cement) and preparation method thereof.
The present invention takes following technical scheme:
A kind of less energy-consumption, low emission cement, the ratio of weight and number of essential mineral is in its grog: C
2S 35-65 part,
20-50 part and C
4AF 5-15 part, the ratio of weight and number that corresponding raw material are formed is: CaO 30-60 part, SiO
25-35 part, Al
2O
35-35 part, SO
31-6 part, Fe
2O
31-10 part.
The parts by weight preferable range of described cement clinker essential mineral is after optimizing coupling: C
2S 46-56 part,
32-42 part and C
4AF 5-9 part, the parts by weight preferable range that corresponding raw material are formed is: CaO 45-53 part, SiO
215-21 part, Al
2O
315-24 part, SO
33.5-5 part, Fe
2O
31.3-3.0 part.
The present invention also provides the preparation method of a kind of above-mentioned less energy-consumption, low emission cement.
Preparation method provided by the present invention can may further comprise the steps:
1) takes by weighing raw material according to the following number of weight ratio: Wingdale 40-65 part, alumina 10-30 part, gypsum 4-25 part, clay 5-30 part (or sandstone 4-24 part);
2) raw material are prefabricated: raw material drying (105 ℃), mixing, grinding, to obtain fineness after sieving be that 80 μ m square hole sieves tail over the raw material into 5-8% (weight percent);
3) calcining: with step 2) cement slurry that obtains obtains cement clinker at 1280 ℃ of-1300 ℃ of calcining at constant temperature 45-70min;
4) add 10-15% in the cement clinker that step 3) obtains, the gypsum of preferred 12.5% (accounting for the weight percentage of cement) makes cement products.
In the preparation method of above-mentioned cement, step 2) blending means of raw material is preferably in: earlier artificial premix 15min places tempering tank to mix again 1 hour; The equipment of grinding can adopt ball mill; Fineness can adopt the water sieve method test.
In the described step 3) cement slurry is also comprised the step of it being carried out the constant temperature pre-burning before 1280 ℃ of-1300 ℃ of high-temperature calcinations, method is: it is 850-950 ℃ retort furnace constant temperature pre-burning 45-70min that raw material are put into temperature.
Described step 4) is mixed and is mixed behind the gypsum levigately, and the control ratio surface-area is at 400 ± 20m
2In/kg the scope.
Among the preparation method of cement, 1280 ℃ of-1300 ℃ of implications of calcining temperature are 〉=1280 ℃ to≤1300 ℃ in the described step 3).But this calcining temperature also can be 〉=and 1280 ℃ to＜1300 ℃, preferred 〉=1290 ℃ to＜1300 ℃, preferred especially 1290 ℃.
Among the preparation method of cement of the present invention, main raw material is Wingdale, alumina, clay (or sandstone) and anhydrite, and its raw material obtain cement clinker through 1280-1300 ℃ of calcining at constant temperature, and drawing essential mineral through the XRD test analysis is C
2S,
And C
4AF.Mix 10-15% in the grog, the gypsum of preferred 12.5% (accounting for the weight percent of cement) makes cement products.Free calcium oxide content is less than 0.2%.
The present invention is by adjusting the clinker mineral system to optimize the mineral composition coupling.Based on the anhydrous calcium sulphoaluminate mineral
CaO content low (36.8%) and formation temperature low (1300 ℃) in the composition possess the characteristics such as advantage of energy-saving and emission-reduction, help improving early strength simultaneously, utilization of the present invention
Substitute the C of high calcium content
3S is with C
2S carries out compound,
The early strong development of contribution, special later strength development, the designed clinker mineral system C of guaranteeing of Baily
2S-
-C
4AF optimizes the mineral composition coupling, to develop the cement of excellent performance.Because these grog system mineral all can be in 1280-1300 ℃ of generation (preferably being lower than 1300 ℃ of temperature), the raw material calcining temperature reduces 150-200 ℃ than ordinary Portland cement, compare 40-80 ℃ of reduction with Belite-calcium barium sulphoaluminate, and simultaneously owing to do not comprise high calcium content and the high C of formation temperature in the mineral system
3S, cement clinker system of the present invention reduces CO reducing the energy
2The discharging aspect has great potential.
The present invention has the following advantages: (1) save energy, the consumption of Wingdale has then reduced the whole hear rate (CaCO that grog burns till than the low 10-15% of ordinary Portland cement (weight percent) in the raw material
3Decompose 46% left and right sides weight percent that hear rate accounts for the theoretical hear rate of grog).Simultaneously, the grog firing temperature is low 100-150 ℃ than ordinary Portland cement, can save grog high temperature and burn till coal consumption; (2) reduce CO
2Discharging, grog is produced the CO that discharges
2Usually from raw material and fuel, so the reduction of the minimizing of amount of lime and coal consumption, the CO during grog is produced all directly reduced
2Discharging.Therefore cement of the present invention has the tremendous potential of low-resource and energy consumption, low emission; (3) early strength of cement and later strength all are better than the strength development rule of ad eundem ordinary Portland cement, have guaranteed the stability and the reliability of cement concrete later strength.In sum, cement products of the present invention will be played a great role in building field, have a extensive future.
Below in conjunction with specific embodiment the present invention is described in further details.
Description of drawings
Fig. 1 burns till the XRD analysis collection of illustrative plates of grog for differing temps
Fig. 2 is different
The sample XRD analysis collection of illustrative plates of content
Fig. 3 is different C
4The sample XRD analysis collection of illustrative plates of AF content
Fig. 4 is the XRD analysis collection of illustrative plates of optimal proportion grog
Embodiment
Less energy-consumption provided by the present invention, low emission cement, the essential mineral that comprises in its grog are C
2S,
And C
4AF.By optimizing the C in the grog
2S,
And C
4The AF mineral composition reaches Optimum Matching, the cement of obtained performance excellence.
Clinker mineral compositional optimization method: with C
2S with
Compound, C in the performance grog
2S to the contribution of cement later strength development and
To the comprehensive advantage of early strength development contribution, optimize C
2S,
And C
4AF mineral composition coupling, by XRD means of testing and strength property analysis, the mineral Optimum Matching scope when working out cement early strength of the present invention and later strength and reaching the best.
Specifically, the ratio of weight and number of essential mineral is in described less energy-consumption, the low emission cement clinker: C
2S 35-65 part,
20-50 part and C
4AF 5-15 part, the ratio of weight and number that corresponding raw material are formed is: CaO 30-60 part, SiO
25-35 part, Al
2O
35-35 part, SO
31-6 part, Fe
2O
31-10 part.
The parts by weight preferable range of described cement clinker essential mineral is after optimizing coupling: C
2S 46-56 part,
32-42 part and C
4AF 5-9 part, the parts by weight preferable range that corresponding raw material are formed is: CaO 45-53 part, SiO
215-21 part, Al
2O
315-24 part, SO
33.5-5 part, Fe
2O
31.3-3.0 part.
Less energy-consumption of the present invention, low emission cement can be prepared according to the following steps:
1) calculates and takes by weighing raw material by raw-meal ingredient: Wingdale 40-65 part, alumina 10-30 part, gypsum 4-25 part, clay 5-30 part (or sandstone 4-24 part);
2) raw material are prefabricated: raw material drying (105 ℃), mixing, grinding, to obtain fineness after sieving be that 80 μ m square hole sieves tail over the raw material into 5-8% (weight percent);
3) calcining: with step 2) cement slurry that obtains obtains cement clinker at 1280 ℃ of-1300 ℃ of calcining at constant temperature 45-70min;
4) add 10-15% in the cement clinker that step 3) obtains, the gypsum of preferred 12.5% (accounting for the weight percentage of cement) makes cement products.
Wherein, the blending means of raw material is preferably described step 2): earlier artificial premix 15min places tempering tank to mix again 1 hour; The equipment of grinding can adopt ball mill; Fineness can adopt the water sieve method test.
In the described step 3) cement slurry is also comprised the step of it being carried out the constant temperature pre-burning before 1280 ℃ of-1300 ℃ of high-temperature calcinations, method is: put into temperature and be 850-950 ℃ retort furnace constant temperature pre-burning 45-70min.
Described step 4) is mixed and is mixed behind the gypsum levigately, and the control ratio surface-area is at 400 ± 20m
2In/kg the scope.
Embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
The preparation of embodiment 1, less energy-consumption, low emission cement slurry
Preparing the used starting material of cement products of the present invention comprises: Wingdale, alumina, gypsum and clay (or sandstone), polar bear building materials company limited provides by Tangshan.
1, raw-material selection
Above raw material is carried out pre-treatment respectively, comprise oven dry (105 ℃), through crusher in crushing, ball mill grinding with all mix, the chemical ingredients total analysis is carried out in sampling, and the result is as shown in table 1:
The chemical constitution of table 1 raw material (weight percent)
| Sample | L.O.I | SiO 2 | Al 2O 3 | Fe 2O 3 | TiO 2 | CaO | MgO | SO 3 | K 2O | Na 2O |
| Wingdale | 42.72 | 0.78 | 0.31 | 0.08 | / | 54.77 | 0.67 | / | 0.04 | 0.05 |
| Alumina | 14.68 | 4.78 | 74.91 | 1.12 | 3.19 | 0.6 | 0.19 | / | 0.16 | 0.09 |
| Gypsum | 6.18 | 1.44 | 0.42 | 0.05 | / | 38.96 | 2.92 | 49.84 | 0.06 | 0.07 |
| Clay | 7.91 | 62.34 | 12.26 | 4.08 | / | 6.2 | 2.49 | / | 2.54 | 1.46 |
| Sandstone | 1.47 | 76.68 | 2.39 | 1.8 | / | 0.96 | 0.21 | 6.62 | / | / |
Wingdale is one of main raw material of preparation cement of the present invention, provides the grog essential mineral to form required CaO.According to secular manufacture of cement and test experience, for guaranteeing the quality of cement of the present invention, used Wingdale index reaches CaO＞53%, SiO
2＜1.5% gets final product.
Alumina provides mainly that essential mineral forms required Al in the grog
2O
3, the scope of preparation alumina that cement of the present invention uses is wider, can contain a certain amount of sulphur during owing to the preparation raw material, therefore sulphur content in the alumina is not limited.
Gypsum is large usage quantity in cement production process of the present invention, not only will mix the gypsum of raw material total amount 4-25wt% in raw material, and when preparation cement, needs the gypsum of admixture cement weight 5-15wt%.Prepare the used gypsum of cement products of the present invention and be anhydrite.
Clay or sandstone provide that essential mineral forms required SiO in the grog
2, preparation cement of the present invention uses and provides the siliceous raw material scope wider, content of magnesia is not limited, so from the angle that economizes on resources, and does not use clay as far as possible and can use the lower sandstone waste material of grade.
2, take by weighing raw material
Taking by weighing raw material by the mineral component design is by weight: Wingdale 40-65 part, alumina 10-30 part, gypsum 4-25 part, clay 5-30 part (or sandstone 4-24 part), the raw material weight content of Xing Chenging is CaO 30-60 part thus, SiO
25-35 part, Al
2O
35-35 part, SO
31-6 part, Fe
2O
31-10 part.
3, raw material are prefabricated
Above-mentioned various starting material are prepared raw material according to default composition, method is: earlier artificial premix 15min, be placed in the tempering tank and mixed 1 hour, place ball mill relaying continued powder mill again, survey its fineness with water sieve method at last, control fineness 80 μ m tail over 5-8% (weight percent), make raw material through the homogenizing drying and are used for calcining cement clinker.
In the test, raw material are pressed into following test block:
Small sample (being used for the burnability of raw material test): the water that mixes 10% (weight percentage) at raw material, place stirrer to mix 5min thoroughly, place particular manufacturing craft compacting φ 34mm * 34mm sample, place in the electrically heated drying cabinet of constant temperature to 105 ℃-110 ℃ more than the baking 60min.
Bulk specimen (being used for the grog firing test): with the water mixing and stirring of raw material and 9-10% (weight percentage), place the wavy pat of single face of special grinding apparatus compacting φ 118mm * 118mm, place in the electrically heated drying cabinet of constant temperature to 105 ℃ and dry by the fire 24h.
The preparation of embodiment 2, less energy-consumption, low emission burning clinker of cement and cement
Press eight kinds of different clinker minerals of table 2 and form design, eight groups of raw material of prefabricated correspondence, raw materials used referring to table 1 among the embodiment 1.
Table 2 mineral composition design (wt%)
1. burnability of raw material test: eight groups of samples are made the small sample that diameter is 34mm in the table 2, place 950 ℃ of retort furnaces (850-950 ℃ all can) constant temperature pre-burning 30min, change over to immediately after the taking-up in the silicon molybdenum rod furnace 6 temperature: behind 1250 ℃, 1280 ℃, 1300 ℃, 1320 ℃, 1350 ℃ and the 1380 ℃ of following calcining at constant temperature 30min, take out grog rapidly and be chilled to room temperature with fan, grind to form analysis sample by 80 μ m testing sieves, finish the free calcium oxide assay according to GB/T 176-2008 " Method for chemical analysis of cement ", the results are shown in table 3.Adopt the essential mineral in X-ray diffraction (XRD) the means qualitative analysis S-7 grog to form, be shown in Fig. 1.
The weight content (%) of free calcium oxide in table 3 grog
| Temperature (℃) | S-1 | S-2 | S-3 | S-4 | S-5 | S-6 | S-7 | S-8 |
| 1250 | 0.71 | 0.56 | 0.35 | 0.33 | 0.25 | 0.36 | 0.29 | 0.21 |
| 1280 | 0.17 | 0.16 | 0.13 | 0.11 | 0.10 | 0.16 | 0.13 | 0.09 |
| 1300 | 0.11 | 0.10 | 0.09 | 0.07 | 0.06 | 0.15 | 0.07 | 0.05 |
| 1320 | 0.08 | 0.06 | 0.05 | 0.03 | 0.03 | 0.05 | 0.02 | 0 |
| 1350 | 0.04 | 0.03 | 0 | 0.02 | 0 | 0.03 | 0 | 0 |
| 1380 | 0.01 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Free calcium oxide content should be less than 0.2% in the general requirement grog, as shown in Table 3, along with the rising of grog firing temperature, the content of the free calcium oxide in the grog trend that all tapers off; When calcining temperature is 1280-1350 ℃, the content of the free calcium oxide of the grog of various proportionings all≤0.2% illustrates that in this temperature range, the burnability of raw material of this clinker mineral system is good.
According to the XRD interpretation of result of Fig. 1 (S-7 grog), calcining temperature in 1250-1300 ℃ of scope, C
2The characteristic peaks of S is strong and peak shape is complete; For
Temperature is lower than 1280 ℃ and be higher than 1300 ℃, in the grog characteristic peak peak value a little less than, illustrate that this mineral formation amount is few, therefore to reach C in the grog
2S and
The optimum formation amount of mineral considers that raw material burn-ability in 1280-1350 ℃ of scope is good, and selected 1280-1300 ℃ is the optimum burning temperature-forming scope of this cement clinker; Wherein 1300 ℃ are ceiling value, and its implication is can be at 1300 ℃, but for reducing energy consumption, is preferably in less than 1300 ℃ of calcinings down, preferably 1290 ℃ of calcinings down.
2. less energy-consumption, low emission burning clinker of cement:
With prefabricated raw material among the embodiment 1, the cement method for making is constant temperature pre-burning 45-70min under the condition of 950 ℃ (850-950 ℃ all can) in temperature routinely, then the pre-burning raw material are changed immediately over to calcining at constant temperature 45-70min in the High Temperature Furnaces Heating Apparatus of constant temperature to 1280 ℃-1300 ℃, be chilled to room temperature after the taking-up, obtain color and be dun cement clinker.
3. preparation cement
Mix the anhydrite of cement weight 5-15% in the grog that step 2 bakes, mix levigately, the control ratio surface-area is at 400 ± 20m
2In/kg the scope, make finished cement.To be this finished cement be sample to used cement of the present invention in the experiment.
The optimization of embodiment 3, less energy-consumption, low emission cement clinker mineral component
Optimization experiment all adopts following method to prepare cement sample: the raw material pat (bulk specimen among the embodiment 1 after will drying, φ 118mm * 118mm) place on the platinum sheet, put into temperature and be 950 ℃ retort furnace constant temperature pre-burning 45-70min, change over to the pre-burning pat in the High Temperature Furnaces Heating Apparatus of constant temperature to 1280 ℃-1300 ℃ immediately together with the platinum sheet then, calcining at constant temperature 45-70min, obtain cement clinker, the anhydrite that mixes cement weight 5% becomes cement sample.
1. in the grog
Determining of weight percent
Prepare burden according to following design: fixation of C
4AF content is 9%, C
2S content changes in the 35-65% scope,
Mineral content is respectively 22%, 27%, 32%, 37%, 42% (reference numeral is the cement clinker of S-1, S-2, S-3, S-4 and S-5), sees table 2 for details.Adopt the mineral constituent of XRD analysis cement clinker to see Fig. 2, the physicals of test cement is shown in table 4, finds out in the grog
Content is to strength of cement Influence and Development rule.
Table 4 anhydrous calcium sulphoaluminate content optimization design cement quality testing result
From the XRD figure spectrum analysis of Fig. 2 grog as can be known,
Characteristic peak increase progressively with content and be enhancing trend, illustrate in the grog
The formation situation of mineral meets grog design (referring to table 2).As shown in Table 4 in the grog
Content has remarkably influenced to cement clinker strength, and the intensity in cement clinker each length of time all is significantly increased, and strength development speed also increases to some extent.Along with
Increasing progressively of content has the C of contribution effect simultaneously to later strength
2S content successively decreases, and is by force the morning of cement clinker to increase progressively trend, and later strength also increases to some extent, this explanation
Early stage, later strength all there is certain contribution effect.Consider that its 3 days intensity should be better than ordinary Portland cement (42.5R:3d intensity is 22MPa), so in the selected grog
The preferred 32-42% of weight percentage.
2. C in the grog
4Determining of AF weight percent
This test is prepared burden according to following scheme, and is fixing
Weight percentage be 37%, C
2S content changes in the 40-60% scope, C
4AF is 5%, 9% and 13% (reference numeral is the cement clinker of S-6, S-7 and S-8 respectively), sees table 2 for details, and the anhydrite that mixes cement weight 5% becomes cement sample.Adopt XRD analysis clinker mineral component to see Fig. 3, The performance test results sees Table 5.According to the development of cement clinker ultimate compression strength performance, determine C in the grog when cement clinker strength reaches optimum value
4The weight percentage of AF.
Table 5C
4AF content optimization design cement quality testing result
The XRD figure spectrum analysis of Fig. 3 is C as can be known
4The AF characteristic peak is not obvious, and this illustrates C
4AF is a solid solution series, and it is imperfect that it forms crystallization within the specific limits, so its XRD characteristic peak peak value a little less than.As shown in Table 5, the C of different content
4The cement clinker ultimate compression strength performance variation of AF correspondence is not remarkable,
Under the identical situation of content, high-content C
4The cement clinker early strength of AF slightly reduces, C in this explanation grog
4AF has negative effect slightly to strength of cement.Therefore selected C
4The weight percentage of AF is preferably 5-9%.
Associative list 2 and present embodiment detected result are determined the parts by weight preferable range of essential mineral in per 100 weight parts cement clinker of the present invention (account for total mineral quantity 95%): C
2S 46-56 part,
32-42 part and C
4AF 5-9 part, the parts by weight preferable range that corresponding raw material are formed: CaO 45-53 part, SiO
215-21 part, Al
2O
315-24 part, SO
33.5-5 part, Fe
2O
31.3-3.0 part.
The preparation of embodiment 4, less energy-consumption, low emission cement
1. proportioning raw materials
Form preferred according to mineral ratio of weight and number in the grog: C
248 parts of S,
42 parts and C
45 parts of AF, corresponding raw material consist of: CaO 48.4%, SiO
216.6%, Al
2O
321.9%, SO
36.6%, Fe
2O
31.6%.Adopting Wingdale, alumina, sandstone and anhydrite is raw material (material chemical component sees Table 1), prepares less energy-consumption of the present invention, low emission cement slurry according to Wingdale 2897 grams, alumina 1016 grams, gypsum 648 grams and sandstone 642 grams.
2. cement production step
1) takes by weighing raw material by above-mentioned ratio of weight and number.
2) raw material are prefabricated: with the earlier artificial premix 15min of raw material, be placed in the tempering tank and mixed 1 hour, place ball mill relaying continued powder mill again, survey its fineness with water sieve method at last, control fineness 80 μ m tail over 5-8% (weight percent).
3) calcining: with step 2) raw material that obtain place on the platinum sheet, put into temperature and be 950 ℃ retort furnace constant temperature pre-burning 60min, change over to the pre-burning raw material in the High Temperature Furnaces Heating Apparatus of constant temperature to 1290 ℃ immediately together with the platinum sheet then, calcining at constant temperature 60min, obtain cement clinker, clinker mineral XRD analysis collection of illustrative plates is seen Fig. 4.
4) cement clinker of the present invention has the early-strong-fast-hard characteristic, and gypsum addition is to cement products performance important influence.The gypsum that adds 5%, 7.5%, 10%, 12.5% and 15% (percentage composition of by mass of cement) in the cement clinker that step 3) obtains mixes levigately, and the control ratio surface-area is at 400 ± 20m
2In/kg the scope, obtain cement products.The cement products The performance test results is referring to table 6.
Table 6 gypsum addition is optimized cement products quality testing result
Form the XRD figure spectrum analysis as seen by clinker mineral among Fig. 4, C
2S and
The characteristic peak peak value is strong and peak shape is complete, shows in the cement clinker that two kinds of mineral physically well develop and the formation amount is many, because the solid solution of iron phase series characteristic, the characteristic peak in the XRD figure spectrum is not obvious.
From table 6 strength of cement results of performance analysis as can be known, gypsum addition is in 5～12.5% scopes, and intensity increases with gypsum addition, and this explanation gypsum is to the effect of being significantly increased of strength of cement performance; When gypsum addition was increased to 15%, strength of cement is retraction to some extent, and the excessive gypsum of this explanation has caused disadvantageous effect to the strength of cement performance.The present invention can select gypsum addition in 10～15% scopes, and the gypsum addition 12.5% preferred volume when reaching the best for strength of cement performance of the present invention.
In sum, in the preferable range that this cement clinker mineral is formed, mix preferred amount of gypsum, gained cement early strength and later stage development are very fast, more than 28 days intensity average out to 55MPa, be better than 28 days intensity (42.5MPa) of 425 grades of ordinary Portland cement performances, illustrate that each mineral reaches Optimum Matching in this mineral composition scope, and the hydration reaction of grog and proper amount of gypsum reaches optimum degree, has given full play to the active effect of early stage to cement separately and later strength.
The composition analysis of embodiment 5, less energy-consumption, low emission cement clinker and the physicals of cement products detect, compare
1. the composition analysis of less energy-consumption, low emission cement clinker
High belite-anhydrous sulphoaluminate cement clinker that embodiment 4 step 3) are obtained carries out composition analysis, the results are shown in Table 7.The weight percent of CaO is 52% as can be seen from Table 7, is lower than the 62-67% in the ordinary Portland cement, illustrates that cement of the present invention has used low calcium component, reaches the purpose of energy-saving and emission-reduction.The content of free calcium oxide is 0.04% to have reached the requirement of grog≤0.2%.
2. the physicals of cement products detects, compares
The mineral proportioning of pressing table 8 with reference to embodiment 4 modes obtains less energy-consumption, low emission cement products (BCSA series, wherein gypsum addition be cement products weight 12.5%), the physicals and ordinary Portland cement (abbreviation P.O of the cement products that BCSA series grog is formed, clinker mineral is formed referring to H.F.W., Taylor, " Cement Chemistry; Second Edition ", the cement performance index is referring to the GB/175-1999 silicate cement, ordinary Portland cement), high belite cement (is called for short HBC, the patent " a kind of cement clinker and preparation technology thereof " that clinker mineral is formed and performance index are CN1193613A referring to the disclosed patent No. in 1998), aluminosulfate cement (is called for short SAC, clinker mineral is formed the 60th page of " aluminosulfate cement " write referring to people such as Wang Yanmous first version in 1999, the cement performance index is referring to shining national standard JC/933-2003 quick hardening sulphoaluminate cement) and Belite-calcium barium sulphoaluminate cement (abbreviation BCBSA, the patent " Belite-calcium barium sulphoaluminate cement " that clinker mineral is formed and the cement performance index is CN1887766A referring to the disclosed patent No. in 2006) compares, the results are shown in Table 8.
The various cement clinker minerals of table 8 are formed and the cement physical properties contrast table
From table 6 and table 8 as can be known, the cement that BCSA series grog forms in the embodiment of the invention 4 and the table 8, early strength (3 days intensity) surpasses 33MPa, and later strength (28 days intensity) is 55MPa all, has surpassed the ultimate compression strength of 52.5 grades of ordinary Portland cements.The bigger contribution that fully combines the special mineral pair cement of Baily later strength reaches
To the raising effect of early strength and later strength, thereby make this cement reach the strength property of expection.Compare with cement of the present invention, normal portland cement P.O is owing to grog firing temperature higher (1450 ℃), and tricalcium silicate (C
3A) content is higher, causes grog production need consume the ample resources and the energy and discharges a large amount of CO
2High belite cement HBC later strength is higher but early strength is relatively low; Aluminosulfate cement SAC then later strength is relatively low, the early strength of the special barium-bearing calcium sulfo-aluminate cement of Baily BCBSA is lower, the high 40-80 of firing temperature ℃ of grog simultaneously, analysis-by-synthesis as can be known, cement early strength of the present invention is higher than HBC, 28d intensity is higher than SAC (42.5) and P.O (42.5), a little more than BCBSA, but the firing temperature of grog is lower than with the cement of raising variety, therefore cement of the present invention has greater advantage as less energy-consumption, low emission cement, is that a kind of aspect of can extensively promoting the use of has huge potential.
The present invention utilizes low calcium, lowly burns till temperature and to the contribution effect is early arranged by force on the basis of high belite cement
Substitute the C of high calcium content
3S is with C
2S carries out compound, and the comprehensive advantage of each mineral is optimized mineral composition coupling and gypsum addition in the performance grog, forms novel high belite-anhydrous aluminosulfate cement, obtains stable and excellent workability and weather resistance.Introduce early strong mineral calcium sulphoaluminate, solved the low problem of the special early strength of Baily, guaranteed the early strength of cement; And the introducing of the special mineral of Baily has also just in time solved the requirement of sulplo-aluminate to the higher-grade bauxitic clay, has reduced grog to Al
2O
3Demand, simultaneously can guarantee the cement later strength by the special aquation that continues of Baily, improve its serviceability and weather resistance.Another characteristic of Baily spy-anhydrous sulplo-aluminate complex cement is to give full play to the low energy-conserving and environment-protective advantage of burning till temperature of its total low calcium.At first,, both can reduce the consumption of Wingdale, save limestone resource, can reduce coal consumption that needs because of decomposition of limestone and the CO that is discharged again because its calcium content is low
2Secondly,, can reduce and burn till coal consumption, reduce the coal-fired CO that produces simultaneously because its firing temperature is low
2Discharging.At last, low burning till under the temperature, the mineral great majority generate by solid state reaction, therefore grog is loose porous, and very easily grinding can reduce the grinding pow consumption (grinding pow consumption of raw material and grog in the production, account in the manufacture of cement total power consumption 50%), also can reduce coal fired power generation and the CO that produces
2Discharging.
The technical indicator of cement of the present invention is:
(1) time of coagulation: initial set: be no earlier than 25min, final set: earlier than 180min;
(2) ultimate compression strength: 28d intensity can be stabilized in more than the 55MPa, is better than the corresponding age strength of 42.5 grades of ordinary Portland cements.
Technical market of the present invention, produce market and potential economic benefit forecast
Cement concrete is as one of material of construction of present consumption maximum, for huge contribution has been made in progress of human society and Economic development.Cement of the present invention can be used for various major construction projects, will produce huge social, economy and environmental benefit.
(1) reduces resources and energy consumption, save cost
With 2010 be China's cement total output to be 18.68 hundred million tons be benchmark value, be roughly equal to 0.1 ton in cement consumption coal per ton, then consume 1.87 hundred million tons in coal.After the project industrialization,, suppose that 10% cement substitutes with less energy-consumption, low emission cement if this technology obtains promoting, intend reaching saving coal consumption index 10% with this project, reduce consumption of limestone 10%, can save about 1,870,000 tons of coal, reduce consumption of limestone above 1,200,000 tons.About 680 yuan/ton of the market price of coal, then only coal-fired one of cement industry can be saved 1,200,000,000 Renminbi, and economic benefit is fairly obvious.
(2) reduce CO
2Discharging realizes low carbon development
According to statistics, the CO that produced of Cement Production process
2Account for global CO
25% of annual total release, China's cement industry Carbon emission account for 10% of the whole nation, and this has caused huge disadvantageous effect to environment.After the present invention accomplishes scale production, intend the CO that novel concrete is produced
2Discharging reduces more than 15%, and the consumption of energy consumption and fat lime stone all can reduce more than 10%, thereby important pushing effect is played in the energy-saving and emission-reduction of cement industry.
(3) improve the utilization of resources, promote the industry Sustainable development
Because cement of the present invention is wider to raw-material claimed range, a large amount of low-grade starting material of can dissolving, cement input of the present invention can improve resource utilization after using.
Claims (10)
1. a less energy-consumption, low emission cement comprise cement clinker, and the ratio of weight and number of essential mineral is in this grog: C
2S 35-65 part,
20-50 part and C
4AF 5-15 part, the ratio of weight and number that corresponding raw material are formed is: CaO 30-60 part, SiO
25-35 part, Al
2O
35-35 part, SO
31-6 part, Fe
2O
31-10 part.
2. cement according to claim 1 is characterized in that: the parts by weight preferable range of described cement clinker essential mineral is: C
2S 46-56 part,
32-42 part and C
4AF 5-9 part, the parts by weight preferable range that corresponding raw material are formed is: CaO 45-53 part, SiO
215-21 part, Al
2O
315-24 part, SO
33.5-5 part, Fe
2O
31.3-3.0 part.
3. cement according to claim 2 is characterized in that: the parts by weight of described cement clinker essential mineral are preferably: C
248 parts of S,
42 parts and C
45 parts of AF, the parts by weight that corresponding raw material are formed are: CaO48.4%, SiO
216.6%, Al
2O
321.9%, SO
36.6%, Fe
2O
31.6%.
4. according to claim 1 or 2 or 3 described cement, it is characterized in that: also comprise 10-15%, the anhydrite of preferred 12.5% (percentage composition of by mass of cement) obtains cement products.
5. the preparation method of a less energy-consumption, low emission cement, its grog preparation may further comprise the steps:
1) calculate the raw material consumption by claim 1 or 2 or 3 described proportionings and also take by weighing respectively, described raw material is Wingdale, alumina, gypsum and clay or sandstone;
2) raw material are prefabricated: it is the cement slurry that 80 μ m tail over 5-8% (weight percent) that raw material is obtained fineness through mixing, grinding, after sieving;
3) calcining: with step 2) cement slurry that obtains obtains cement clinker at 1280 ℃-1300 ℃ calcining 45-70min.
6. preparation method according to claim 5 is characterized in that: the blending means of raw material is described step 2): earlier artificial premix 15min places tempering tank to mix again 1 hour; The equipment of grinding can adopt ball mill; Can adopt water sieve method to survey its fineness.
7. preparation method according to claim 5 is characterized in that: in the described step 3) cement slurry is also comprised its process at 850-950 ℃ of constant temperature pre-burning 45-70min before 1280 ℃ of-1300 ℃ of high-temperature calcinations.
8. preparation method according to claim 5 is characterized in that: also comprise step 4): add 10-15% in the cement clinker that step 3) obtains, the anhydrite of preferred 12.5% (accounting for the weight percentage of cement) obtains cement products.
9. preparation method according to claim 7 is characterized in that: described step 4) is mixed and is mixed behind the gypsum levigately, and the control ratio surface-area is at 400 ± 20m
2In/kg the scope.
10. according to the arbitrary described preparation method of claim 5 to 9, it is characterized in that: calcining temperature is 〉=1280 ℃ to＜1300 ℃ in the described step 3), and is preferred 〉=1290 ℃ to＜1300 ℃, preferred especially 1290 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101212121A CN102249576A (en) | 2011-05-11 | 2011-05-11 | Low-energy-consumption and low-emission cement and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101212121A CN102249576A (en) | 2011-05-11 | 2011-05-11 | Low-energy-consumption and low-emission cement and preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102249576A true CN102249576A (en) | 2011-11-23 |
Family
ID=44977201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101212121A Pending CN102249576A (en) | 2011-05-11 | 2011-05-11 | Low-energy-consumption and low-emission cement and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102249576A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104844022A (en) * | 2015-04-01 | 2015-08-19 | 盐城工学院 | Low-calcium silicate cement clinker and preparation method of cement of clinker |
| WO2015124044A1 (en) * | 2014-02-24 | 2015-08-27 | 唐山北极熊建材有限公司 | Rapid-setting and hardening, high-belite sulfoaluminate cement clinker as well as application and production process thereof |
| CN104876462A (en) * | 2015-05-14 | 2015-09-02 | 南京工业大学 | Novel cementing material capable of absorbing CO2 and preparation method of novel cementing material |
| CN105060745A (en) * | 2015-08-14 | 2015-11-18 | 盐城工学院 | Belite-sulphoaluminate-ferrous aluminate cement and preparation method thereof |
| CN105130218A (en) * | 2015-07-28 | 2015-12-09 | 盐城工学院 | Low-calcium portland cement and its preparation method and hardening method |
| CN107935423A (en) * | 2017-11-22 | 2018-04-20 | 唐山北极熊建材有限公司 | Corrosion-resistant high belite sulphoaluminate cement clinker and preparation method and corrosion-resistant high belite sulphate aluminium cement and preparation method |
| CN109336432A (en) * | 2018-09-11 | 2019-02-15 | 长安大学 | A kind of clinker preparation method and device |
| CN113033923A (en) * | 2021-04-30 | 2021-06-25 | 中国建筑材料科学研究总院有限公司 | Method, device and system for predicting, evaluating and optimizing performance of cement clinker |
| CN113929326A (en) * | 2021-11-25 | 2022-01-14 | 青岛海泰能源科学技术研究院 | Preparation method and preparation system of cement |
| CN115611654A (en) * | 2021-07-12 | 2023-01-17 | 嘉华特种水泥股份有限公司 | Aerated concrete and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1850693A (en) * | 2006-05-25 | 2006-10-25 | 河北科技大学 | Method for producing cement using high-carbon fly ash |
-
2011
- 2011-05-11 CN CN2011101212121A patent/CN102249576A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1850693A (en) * | 2006-05-25 | 2006-10-25 | 河北科技大学 | Method for producing cement using high-carbon fly ash |
Non-Patent Citations (1)
| Title |
|---|
| 《中国材料工程大典 无机非金属材料工程(下)》 20060331 江东亮等 快硬硫铝酸盐水泥 544 1-4 第9卷, 第1版 * |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170050882A1 (en) * | 2014-02-24 | 2017-02-23 | Tangshan Polar Bear Building Materials Co., Ltd. | Rapid-setting and hardening, high-belite sulfoaluminate cement clinker as well as application and production process thereof |
| WO2015124044A1 (en) * | 2014-02-24 | 2015-08-27 | 唐山北极熊建材有限公司 | Rapid-setting and hardening, high-belite sulfoaluminate cement clinker as well as application and production process thereof |
| KR101917017B1 (en) * | 2014-02-24 | 2018-11-08 | 탕산 폴라 베어 빌딩 메터리얼즈 컴퍼니 리미티드 | Rapid-setting and hardening, high-belite sulfoaluminate cement clinker as well as application and production process thereof |
| US9822036B2 (en) * | 2014-02-24 | 2017-11-21 | Tangshan Polar Bear Building Materials Co., Ltd. | Rapid-setting and hardening, high-belite sulfoaluminate cement clinker as well as application and production process thereof |
| CN104844022A (en) * | 2015-04-01 | 2015-08-19 | 盐城工学院 | Low-calcium silicate cement clinker and preparation method of cement of clinker |
| CN104876462A (en) * | 2015-05-14 | 2015-09-02 | 南京工业大学 | Novel cementing material capable of absorbing CO2 and preparation method of novel cementing material |
| CN104876462B (en) * | 2015-05-14 | 2016-10-26 | 南京工业大学 | One can absorb CO2cementing material and preparation method thereof |
| CN105130218A (en) * | 2015-07-28 | 2015-12-09 | 盐城工学院 | Low-calcium portland cement and its preparation method and hardening method |
| WO2017016062A1 (en) * | 2015-07-28 | 2017-02-02 | 盐城工学院 | Low-calcium silicate cement, and preparation method and hardening method thereof |
| US10058874B2 (en) | 2015-07-28 | 2018-08-28 | Yancheng Institute Of Technology | Low-calcium silicate cement and preparation and hardening methods thereof |
| CN105060745A (en) * | 2015-08-14 | 2015-11-18 | 盐城工学院 | Belite-sulphoaluminate-ferrous aluminate cement and preparation method thereof |
| CN107935423A (en) * | 2017-11-22 | 2018-04-20 | 唐山北极熊建材有限公司 | Corrosion-resistant high belite sulphoaluminate cement clinker and preparation method and corrosion-resistant high belite sulphate aluminium cement and preparation method |
| CN107935423B (en) * | 2017-11-22 | 2020-12-08 | 唐山北极熊建材有限公司 | Corrosion-resistant high belite sulphoaluminate cement clinker, preparation method thereof, corrosion-resistant high belite sulphoaluminate cement and preparation method thereof |
| CN109336432A (en) * | 2018-09-11 | 2019-02-15 | 长安大学 | A kind of clinker preparation method and device |
| CN109336432B (en) * | 2018-09-11 | 2021-07-27 | 长安大学 | Cement clinker preparation method and device |
| CN113033923A (en) * | 2021-04-30 | 2021-06-25 | 中国建筑材料科学研究总院有限公司 | Method, device and system for predicting, evaluating and optimizing performance of cement clinker |
| CN115611654A (en) * | 2021-07-12 | 2023-01-17 | 嘉华特种水泥股份有限公司 | Aerated concrete and preparation method thereof |
| CN113929326A (en) * | 2021-11-25 | 2022-01-14 | 青岛海泰能源科学技术研究院 | Preparation method and preparation system of cement |
| CN113929326B (en) * | 2021-11-25 | 2023-02-28 | 青岛海泰能源科学技术研究院 | Preparation method and preparation system of cement |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102249576A (en) | Low-energy-consumption and low-emission cement and preparation method and application thereof | |
| CN101367629B (en) | Manufacture of sulphur aluminate cements with electrolytic manganesium residue and method of manufacturing the same | |
| WO2021190045A1 (en) | High-iron and low-calcium silicate cement and preparation method therefor | |
| CN101333083A (en) | High performance expansible cement clinker expansion agent series prepared thereby | |
| Bouzidi et al. | Synthesis and characterization of belite cement with high hydraulic reactivity and low environmental impact | |
| CN105314902B (en) | The method that belite sulphoaluminate cement clinker is calcined all of industrial residue | |
| CN101172798A (en) | Building gypsum and mineral additive, and method of manufacturing the same | |
| CN115677243B (en) | Preparation method of low-carbon cement clinker | |
| CN102491655B (en) | Portland cement made from self-pulverized clinker and slag and preparation method for Portland cement | |
| CN108892401B (en) | Method for calcining belite sulphoaluminate cement clinker by using phosphogypsum and cement clinker | |
| CN103964713A (en) | Method for preparing belite-sulphate aluminium cement by using coal ashes and bayer-process red mud | |
| CN112608047B (en) | Modified sulphoaluminate cement and preparation method and application thereof | |
| CN108675657A (en) | A method of preparing silicate-aluminium sulfate compound system clinker using waste residue | |
| CN108249795A (en) | A kind of magnesium phosphate cement | |
| CN112624640A (en) | Full-solid waste sulphoaluminate cement clinker for prefabricated parts and preparation method thereof | |
| CN102603218A (en) | Method for preparing high belite and sulphoaluminate cement clinker by aid of high-alumina fly ash | |
| CN108046621A (en) | A kind of preparation method of calcined dolomite powder | |
| Goncharov et al. | Eco-friendly belite cement from crude calcareous oil shale with low calorific value | |
| Xie et al. | Characterization and use of biomass power plant ash in sulfoaluminate cementitious materials | |
| WO2022095515A1 (en) | Portland cement clinker and preparation method therefor | |
| CN105000814A (en) | Processing method for preparing fast-hardening early-strength oil well cement with industrial waste slag | |
| CN114716164A (en) | Sulphoaluminate cement with phosphogypsum as main raw material and preparation method thereof | |
| CN106966617B (en) | Easy fired belite-aluminium sulfate-sulphur ferrous aluminate-sulphur calcium silicate cement clinker method | |
| CN104926162B (en) | Low-carbon ordinary portland cement and preparation method thereof | |
| CN102701612A (en) | Manufacturing method of composite phosphorus slag powder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111123 |