CN104058617A - Portland cement clinker and preparation method thereof - Google Patents
Portland cement clinker and preparation method thereof Download PDFInfo
- Publication number
- CN104058617A CN104058617A CN201410265848.7A CN201410265848A CN104058617A CN 104058617 A CN104058617 A CN 104058617A CN 201410265848 A CN201410265848 A CN 201410265848A CN 104058617 A CN104058617 A CN 104058617A
- Authority
- CN
- China
- Prior art keywords
- raw material
- clinker
- grog
- cement clinker
- preparation
- 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.)
- Granted
Links
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a Portland cement clinker which contains trace magnesium and trace phosphorus, and R type Alite accounting for 52wt%-65wt%. The invention also discloses a preparation method of the Portland cement clinker; the preparation method comprises the following steps: step 1, selecting raw material components according to the composition of the desired cement clinker and determining the weight proportion of each raw material component, wherein the raw material components include at least one magnesium raw material and at least one phosphorus raw material; step 2, thoroughly mixing the raw material components, and then performing high-temperature calcination on the mixture, and then quickly cooling to a room temperature, thereby obtaining the cement clinker; in the cement clinker, the weight percentage of the phosphorus content in terms of the oxide P2O5 is 0.5%-1.2%, while the weight percentage of the magnesium in terms of the oxide MgO is 1%-5%. The Portland cement clinker prepared by the preparation method contains R type tricalcium silicate, and the compressive strength of the clinker can be greatly improved in contrast with the clinker prepared by use of other methods.
Description
Technical field
The present invention relates to building material technical field, particularly relate to a kind of Portland clinker, and the preparation method of this Portland clinker.
Background technology
Silicate cement, since invention, has been used till today always, is most widely used inorganic coagulation material.China's cement output continuous two more than ten years occupy the first in the world, within 2013, have reached 24.1 hundred million tons, account for 60% of world's cement total output, and wherein, silicate cement accounts for more than 98%.Huge quantity has met national construction demand, but oeverall quality still has gap apart from advanced international standard: intensity is lower, energy consumption is larger, the Sustainable development of restriction industry.
Silicate cement is by Portland clinker, sneaks into that a small amount of gypsum and blended material be prepared from.The cement of high-quality depends primarily on grog.The Mineral Composition Features of Portland clinker is all with alite mineral (tricalcium silicate 3CaOSiO
2=C
3the sosoloid of S) be main, other also has belite mineral (Dicalcium Phosphate (Feed Grade) 2CaOSiO
2=C
2the sosoloid of S), tricalcium aluminate (3CaOAl
2o
3=C
3a), tetracalcium aluminoferrite (4CaOAl
2o
3fe
2o
3=C
4the mineral such as AF).Alite comprehensive physical and chemical performance in several mineral is best, and content is the highest, has determined condensing and a series of fundamental propertys such as intensity of cement.Therefore the key that improves silicate cement quality is to improve alite content or improves alite active.But improving alite content has inevitably caused grog to burn till the problems such as difficulty.Alite has 7 kinds of crystal formations of 3 crystallographic systems, i.e. three oblique (T comprises T1, T2, T3), monocline (M comprises M1, M2, M3), tripartite (R), and they can transform mutually in differing temps scope.These 7 kinds of crystalline structure symmetry are successively raise by T1 to R, and activity also increases successively.Therefore, the stable R type C that obtains high reactivity Gao Jiewen
3s is the most basic problem that improves clinker quality.Change grog firing process and also can adjust C by thermal treatment etc.
3s crystal formation, but be incubated in its preparation process requirement naturally cooling or process of cooling, this not only meets existing clinker production technology, and can produce great energy dissipation.Visible, do not changing existing firing process, do not increase grog and burn till under energy consumption, by dopant ion, stablize high reactivity Alite crystal, the effect that the optimization of performance dopant ion improves alite intensity, is the fundamental way that improves clinker strength.By ion doping, can prepare different crystal forms C
3s, the existing pure C of bibliographical information
3in S, introduce high volume Zn, Cu or Ti and can stablize R type, but these technical schemes are limited by raw material sources not only, the heavy metal Zn of introducing and Cu also can produce certain destruction or potential safety hazard in preparation or application process.Especially grog is a baroque Ca-Si-Al-Fe multicomponent system of composition, causes being difficult to break through the Modulatory character of crystal formation, not yet obtains the high efficient and reliable being applicable in grog and stablizes R type C
3s improves the method for clinker strength.
Summary of the invention
The object of the invention is to propose a kind of preparation method of Portland clinker, in the Portland clinker that makes to prepare, alite is highly active R type, improve clinker strength, to solve, in prior art, need to change grog firing process or need to mix the problem that heavy metal Zn, Cu or F etc. cause environmental pollution.
In order to solve the problems of the technologies described above, the present invention has adopted following technical scheme:
A preparation method for Portland clinker, comprises the following steps:
Step 1, selects raw material component also to determine the weight proportion of each raw material component according to the composition of required cement clinker, and raw material component comprises that at least one contains magnesium raw material, and comprises at least one phosphorous raw material;
Step 2, fully mixes above-mentioned raw material component, and then through high-temperature calcination, speed is chilled to room temperature and is prepared into cement clinker;
In described cement clinker, phosphorus content is pressed oxide compound P
2o
5meter, quality percentage composition is 0.5%～1.2%; Mg content is by oxide M gO, and quality percentage composition is 1%～5%.
The preparation method of Portland clinker as above, further, the temperature range of high-temperature calcination is at 1400 ℃～1500 ℃.
The preparation method of Portland clinker as above, further, carries out grinding by gained cement clinker, and Quality control fineness grinding is to specific surface area 320～360m
2/ kg.
The Portland clinker that has aforesaid method to prepare, wherein contains trace magnesium and trace amounts of phosphorus, and the R type alite of weight percent 52%～64%.
Portland clinker as above, comprises following component, percentage ratio meter by weight,
R type alite C
3s:52%～64%;
Belite C
2s:14%～26%;
Tricalcium aluminate C
3a:6%～11%;
Tetracalcium aluminoferrite C
4aF:9～15%;
Free calcium oxide f-CaO:0～1.5%;
Surplus is other phase, and wherein said trace magnesium counts 1%～5% with MgO; Described trace amounts of phosphorus is with P
2o
5count 0.5%～1.2%.
Portland clinker as above, further, the weight percent of R type alite is 54%～60%.
Compared with prior art, beneficial effect of the present invention is:
1, preparation method of the present invention, by the content of magnesium and phosphorus in assurance grog, realizes and stablizes R type C
3s improves the object of clinker strength, does not additionally add the component of the contaminate environment such as fluorine, sulphur, and Environmental Safety is reliable, and raw materials used wide material sources, and applicability is strong.
2, preparation method of the present invention does not change existing production technique, does not increase grog and burns till energy consumption, has significantly improved clinker strength.
3, the clinker strength that prepared by the present invention is high, when preparing the cement of equality strength grade, can reduce clinker dosage, strengthens blended material consumption, improves the effectiveness of grog, and energy-conserving profit waste reduces discharging.
4, to prepare gained cement clinker mesosilicic acid DFP be R type to the inventive method, and the grog that grog ultimate compression strength is not implemented this technology can significantly improve.
Accompanying drawing explanation
Fig. 1 a is the alite local feature fingerprint region schematic diagram of sample A in the embodiment of the present invention 1;
Fig. 1 b is the alite local feature fingerprint region schematic diagram of sample B in the embodiment of the present invention 1;
Fig. 1 c is the alite local feature fingerprint region schematic diagram of sample C in the embodiment of the present invention 1;
Fig. 1 d is the alite local feature fingerprint region schematic diagram of sample D in the embodiment of the present invention 1;
Fig. 2 is the alite local feature fingerprint region schematic diagram of sample C0 and C1 in the embodiment of the present invention 2;
Fig. 3 is the alite local feature fingerprint region schematic diagram of sample E in the embodiment of the present invention 4;
Fig. 4 is the alite local feature fingerprint region schematic diagram of sample F in the embodiment of the present invention 4;
Fig. 5 is the alite local feature fingerprint region schematic diagram of sample G in the embodiment of the present invention 4;
Fig. 6 is the alite local feature fingerprint region schematic diagram of sample H in the embodiment of the present invention 4.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail, but not as a limitation of the invention.
The present invention is directed to the main provider of this cement clinker strength of alite, by introducing regulation and control component in the multicomponent system grog complicated, make alite retain highly active R crystal formation, preparation R type alite silicate cement clinker, realizes the object that improves cement clinker strength.In the grog system forming general typical case, alite inevitably solid solution simultaneously has Na
+, K
+, Mg
2+, Al
3+, Fe
3+etc. different kinds of ions, in grog, often do not contain phosphorus or contain very micro-phosphorus (common 0～0.3wt% is in the oxide compound of phosphorus), alite is mainly monocline M3 crystal formation.The present invention, by adjusting Mg content in grog, separately introduces the phosphorus of certain content in grog, can prepare the cement clinker containing high reactivity R type alite.
Embodiment 1:
Design clinker mineral composition is followed successively by C
3s:61%, C
2s:20%, C
3a:7% and C
4aF:12%, raw material rate value is respectively KH=0.898, n=2.5, p=1.31, MgO content 2% in grog, to contain CaHPO
42H
2o mineral forms is that main phosphorous raw material is phosphorus source (following examples all with), and in grog, phosphorus introduction volume is 1%P
2o
5.A as a comparison does not contain magnesium and phosphorus in grog; B as a comparison contains magnesium but is not phosphorous in grog; C as a comparison does not contain magnesium but is phosphorous in grog.Gained cement clinker chemical constitution is in Table 1.By the raw-meal ingredient calculating, coordinate each raw material and be mixed evenly, the raw material that mix are chilling after 1450 ℃ of calcinings of High Temperature Furnaces Heating Apparatus.By cooled chamotte crushing grinding, adopting Blain specific surface determinator to control grog fineness ratio surface-area is (340 ± 20) m
2/ kg.
The chemical constitution of table 1 grog
Fig. 1 has provided 32 °～33 ° of the local feature fingerprint regions of alite in prepared grog sample, and the diffraction peak figure of 51 °～52 ° of scopes (has deducted Cu K
α 2diffraction).In sample A containing Mg and P, because the solid solution of other impurity makes
with
(224)spacing approach, cause the two crystal face diffraction peaks to merge, between 51 °～52 °
(620)two acromions that diffraction peak left and right exists, the corresponding monocline M1 crystal formation of difference and monocline M3 crystal formation
(040)diffraction peak, shows that in A sample, alite is the mixing crystal formation of M1 and M3.In sample B, contain 2%MgO not containing P, between 32 °～33 °, have the small peak of 3 bifurcateds, at 51 °～52 °, locate to be 2 bifurcated small peaks, show as typical M3 crystal formation.The existence of MgO can promote to burn till and affect solid solution reaction, in sample C, contains 1%P
2o
5but containing Mg, cause existing in grog relatively large C
2s, alite
with
(224)although crystal face diffraction exist to merge phenomenon, between 51-52 °, still exist
(620)with
(040)two crystal face diffraction peaks, show that it is M3 crystal formation.In embodiment 1 (sample D), contain 2%MgO and 1%P simultaneously
2o
5, 32 °～33 ° only have two diffraction peaks, and also only have a R type between 51-52 °
(220)crystal face diffraction peak, shows that in D grog, alite is R type.
The above-mentioned gained grog of preparing is sneaked into 5% gypsum, according to GB/T17671-1999, grog sample has been carried out to ultimate compression strength experiment.Water cement ratio 0.5, blunge is made the test block of 40mm * 40mm * 40mm glue sand, by normal curing, has measured respectively its 3 days, and 7 days, 28 days and 90 days ultimate compression strength, in Table 2.
Table 2 grog sample free ca content, specific surface area and strength property
Embodiment 2:
According to chemical constitution and the mineral composition of the special-purpose grog of current China reference cement (hereinafter referred to as benchmark grog), design clinker mineral composition is followed successively by C
3s:60%, C
2s:23%, C
3a:7% and C
4aF:10%, raw material rate value is respectively KH=0.887, n=2.95, p=1.44, MgO content 2.57% in grog, in grog, phosphorus introduction volume is 0.6%P
2o
5, grog chemical constitution is in Table 3.By the raw-meal ingredient calculating, coordinate each raw material and be mixed evenly, the raw material that mix are chilling after 1450 ℃ of calcinings of High Temperature Furnaces Heating Apparatus.By cooled chamotte crushing grinding, adopting Blain specific surface determinator to control grog fineness ratio surface-area is (340 ± 20) m
2/ kg.
The chemical constitution of table 3 grog
Fig. 2 has provided 32 °～33 ° of the local feature fingerprint regions of prepared grog sample alite, and the diffraction peak figure of 51 °～52 ° of scopes (has deducted Cu K
α 2diffraction).In benchmark grog sample C0, alite all has the small peak of 3 bifurcateds between 32 °～33 °, at 51 °～52 °, locates to be 2 bifurcated small peaks, is M3 crystal formation.Work as 0.6%P
2o
5after being incorporated in grog, M3 crystal formation position is corresponding
with
(224)crystal face diffraction peak disappears, and only occurs R crystal formation
crystal face diffraction, M3 crystal formation exists originally between 51-52 °
(620)with
(040)two crystal face diffraction peaks also disappear, and only occur R type
(220)crystal face diffraction, shows that in the C1 grog of embodiment 2, alite is high reactivity R type.
According to GB/T17671-1999, grog sample has been carried out to ultimate compression strength experiment.Water cement ratio 0.5, blunge is made the test block of 40mm * 40mm * 40mm glue sand, by normal curing, has measured respectively its 3 days, and 7 days, 28 days and 90 days ultimate compression strength, in Table 4.
Table 4 grog sample free ca content, specific surface area and strength property
Embodiment 3:
According to chemical constitution and the mineral composition of the special-purpose grog of current China reference cement, design clinker mineral composition is followed successively by C
3s:60%, C
2s:23%, C
3a:7% and C
4aF:10%, raw material rate value is respectively KH=0.887, n=2.95, p=1.44, MgO content 2.56% in grog, in grog, phosphorus introduction volume is 1%P
2o
5batching, grog chemical constitution is in Table 5.By the raw-meal ingredient calculating, coordinate each raw material and be mixed evenly, raw material are chilling after 1450 ℃ of calcinings of High Temperature Furnaces Heating Apparatus.By cooled chamotte crushing grinding, adopting Blain specific surface determinator to control grog fineness ratio surface-area is (340 ± 20) m
2/ kg.
The chemical constitution of table 5 grog
According to GB/T17671-1999, grog sample has been carried out to ultimate compression strength experiment.Water cement ratio 0.5, blunge is made the test block of 40mm * 40mm * 40mm glue sand, by normal curing, has measured respectively its 3 days, and 7 days, 28 days and 90 days ultimate compression strength, in Table 6.
Table 6 grog sample free ca content, specific surface area and strength property
Embodiment 4:
According to chemical constitution and the mineral composition of the special-purpose grog of current China reference cement, design clinker mineral composition is followed successively by C
3s:60%, C
2s:23%, C
3a:7% and C
4aF:10%, raw material rate value is respectively KH=0.887, n=2.95, p=1.44, in grog, MgO content is made as respectively 2.59%, 2.58%, 2.55%, 0.50% and 1%, and in grog, phosphorus introduction volume is respectively 0%P
2o
5, 0.3%P
2o
5, 1.5%P
2o
5, 1.0%P
2o
5and 0.6%P
2o
5, grog chemical constitution is in Table 7.By the raw-meal ingredient calculating, coordinate each raw material and be mixed evenly, the raw material that mix are chilling after 1450 ℃ of calcinings of High Temperature Furnaces Heating Apparatus.By cooled chamotte crushing grinding, adopting Blain specific surface determinator to control grog fineness ratio surface-area is (340 ± 20) m
2/ kg.
The chemical constitution of table 7 grog sample
Fig. 3, Fig. 4, Fig. 5 and Fig. 6 have provided respectively 32 °～33 ° of the local feature fingerprint regions of alite in prepared grog sample, and the diffraction peak figure of 51 °～52 ° of scopes (has deducted Cu K
α 2diffraction).In sample E, contain 2.58%MgO and a small amount of 0.3%P
2o
5although,
with
(224)two crystal face diffraction peaks merge, but between 51 °～52 °
(620)the short and small acromion that diffraction peak right side exists, corresponding monoclinic form
(040)diffraction peak, shows that in E sample, alite is the mixing crystal formation of monocline and R crystal formation.In sample F, contain 2.55%MgO and high volume P
2o
5(1.5%), 32 °～33 ° only have two diffraction peaks, and also only have a R type between 51-52 °
(220)crystal face diffraction peak, shows that in this grog, alite is R type, but because P volume is too high, makes grog burn till difficulty, has a certain amount of C in grog
2s, and cause having in grog the phosphoric acid salt of not solid solution, make the early stage degradation of grog (in Table 8).In sample G, contain a small amount of MgO (0.5%) and 1%P
2o
5, because the solid solution of the impurity such as Mg, P makes
with
(224)spacing approach, cause the two crystal face diffraction peaks to merge, but between 51 °～52 °
(620)the short and small acromion that diffraction peak right side exists, corresponding monoclinic form
(040)diffraction peak, shows that in G sample, alite is the mixing crystal formation of monocline and R crystal formation.In embodiment 4 (sample H), contain 1%MgO and 0.6%P
2o
5, 32 °～33 ° only have two diffraction peaks, and also only have a R type between 51-52 °
(220)crystal face diffraction peak, shows that in this grog, alite is R type.
According to GB/T17671-1999, grog sample has been carried out to ultimate compression strength experiment.Water cement ratio 0.5, blunge is made the test block of 40mm * 40mm * 40mm glue sand, by normal curing, has measured respectively its 3 days, and 7 days, 28 days and 90 days ultimate compression strength, in Table 8.
Table 8 grog sample free ca content, specific surface area and strength property
Above embodiment is only exemplary embodiment of the present invention, is not used in restriction the present invention, and protection scope of the present invention is defined by the claims.Those skilled in the art can make various modifications or be equal to replacement the present invention in essence of the present invention and protection domain, this modification or be equal to replacement and also should be considered as dropping in protection scope of the present invention.
Claims (6)
1. a Portland clinker, is characterized in that, wherein contains trace magnesium and trace amounts of phosphorus, and the R type alite of weight percent 52%～64%.
2. Portland clinker according to claim 1, is characterized in that, comprises following component, percentage ratio meter by weight,
R type alite: 52%～64%;
Belite: 14%～26%;
Tricalcium aluminate: 6%～11%;
Tetracalcium aluminoferrite: 9～15%;
Free calcium oxide: 0～1.5%;
Surplus is other phase, and wherein said trace magnesium counts 1%～5% with MgO; Described trace amounts of phosphorus is with P
2o
5count 0.5%～1.2%.
3. Portland clinker according to claim 1, is characterized in that, the weight percent of R type alite is 54%～60%.
4. the preparation method of Portland clinker according to claim 1, is characterized in that, said method comprising the steps of:
Step 1, selects raw material component also to determine the weight proportion of each raw material component according to the composition of required cement clinker, and raw material component comprises that at least one contains magnesium raw material, comprises at least one phosphorous raw material;
Step 2, fully mixes above-mentioned raw material component, and then through high-temperature calcination, speed is chilled to room temperature and is prepared into cement clinker;
In described cement clinker, phosphorus content is pressed oxide compound P
2o
5meter, quality percentage composition is 0.5%～1.2%; Mg content is by oxide M gO, and quality percentage composition is 1%～5%.
5. the preparation method of Portland clinker according to claim 4, is characterized in that, the temperature range of high-temperature calcination is at 1400 ℃～1500 ℃.
6. the preparation method of Portland clinker according to claim 4, is characterized in that, gained cement clinker is carried out to grinding, and Quality control fineness grinding is to specific surface area 320～360m
2/ kg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410265848.7A CN104058617B (en) | 2014-06-13 | 2014-06-13 | A kind of Portland clinker and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410265848.7A CN104058617B (en) | 2014-06-13 | 2014-06-13 | A kind of Portland clinker and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104058617A true CN104058617A (en) | 2014-09-24 |
| CN104058617B CN104058617B (en) | 2017-10-27 |
Family
ID=51546594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410265848.7A Active CN104058617B (en) | 2014-06-13 | 2014-06-13 | A kind of Portland clinker and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104058617B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112341010A (en) * | 2020-11-06 | 2021-02-09 | 南京工业大学 | Portland cement clinker and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1587157A (en) * | 2004-09-14 | 2005-03-02 | 中国建筑材料科学研究院 | High strength silicate clinker and its preparing method |
| JP2007169084A (en) * | 2005-12-19 | 2007-07-05 | Ube Ind Ltd | Cement clinker and cement composition |
| CN101041560A (en) * | 2003-09-17 | 2007-09-26 | 中国建筑材料科学研究院 | High-magnesium low-heat portland cement clinker aggregate and preparation method thereof |
| CN103755179A (en) * | 2013-12-20 | 2014-04-30 | 柳州正菱集团有限公司 | Cement curing catalyst |
-
2014
- 2014-06-13 CN CN201410265848.7A patent/CN104058617B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101041560A (en) * | 2003-09-17 | 2007-09-26 | 中国建筑材料科学研究院 | High-magnesium low-heat portland cement clinker aggregate and preparation method thereof |
| CN1587157A (en) * | 2004-09-14 | 2005-03-02 | 中国建筑材料科学研究院 | High strength silicate clinker and its preparing method |
| JP2007169084A (en) * | 2005-12-19 | 2007-07-05 | Ube Ind Ltd | Cement clinker and cement composition |
| CN103755179A (en) * | 2013-12-20 | 2014-04-30 | 柳州正菱集团有限公司 | Cement curing catalyst |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112341010A (en) * | 2020-11-06 | 2021-02-09 | 南京工业大学 | Portland cement clinker and preparation method thereof |
| CN112341010B (en) * | 2020-11-06 | 2021-08-20 | 南京工业大学 | Portland cement clinker and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104058617B (en) | 2017-10-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Shen et al. | Calcium sulphoaluminate cements made with phosphogypsum: Production issues and material properties | |
| CN103880310B (en) | A kind of portland slag cement and production method thereof | |
| CN106316172B (en) | Fine high intensity High-belite Cement and preparation method thereof | |
| CN103553377B (en) | Method for producing silicate clinker by using yellow phosphorus slag to replace part of clay | |
| CN104496228A (en) | Road silicate cement clinker and preparation method thereof | |
| CN109369044B (en) | Sulphoaluminate cement and preparation method thereof | |
| CN105254193B (en) | It is a kind of using discarded object as the cement of raw material and the preparation method of clinker | |
| JP2013103865A (en) | Method of manufacturing cement paste | |
| CN103664014A (en) | White sulphoaluminate cement and preparing method thereof | |
| Xie et al. | The effect of fluorapatite in limestones on the mineral compositions of Portland cement clinkers | |
| Singh et al. | Preparation of calcium sulphoaluminate cement using fertiliser plant wastes | |
| CN104446048A (en) | High-calcium sulfoaluminate series cement | |
| CN106277872B (en) | Application of the iron cement containing calorific value in producing clinker | |
| CN105000814A (en) | Processing method for preparing fast-hardening early-strength oil well cement with industrial waste slag | |
| CN1315749C (en) | High strength silicate clinker and its preparing method | |
| CN101462837B (en) | Method for producing cement clinker | |
| CN104058617A (en) | Portland cement clinker and preparation method thereof | |
| JP5932478B2 (en) | Cement composition and method for producing the same | |
| CN112341014A (en) | Retarding clinker and preparation method thereof | |
| CN101857389A (en) | Method for preparing sulphoaluminate cement clinker with fluorgypsum, phosphogypsum and copper tailings | |
| JP2013224227A (en) | Method for producing cement composition | |
| CN102010765A (en) | Formulated fuel and preparation process thereof | |
| CN105293956A (en) | Ordinary Portland cement clinker preparation method using molybdenum tailings to replace clay | |
| CN109867456B (en) | Application of magnesium sulfate, portland cement containing magnesium sulfate, preparation method and application thereof | |
| CN110183124A (en) | A kind of microdilatancy sulphoaluminate cement clinker and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |