CN1092390A - Make the cement production process of cement slurry raw material and blended material with aluminium sulfate slag - Google Patents
Make the cement production process of cement slurry raw material and blended material with aluminium sulfate slag Download PDFInfo
- Publication number
- CN1092390A CN1092390A CN93121179A CN93121179A CN1092390A CN 1092390 A CN1092390 A CN 1092390A CN 93121179 A CN93121179 A CN 93121179A CN 93121179 A CN93121179 A CN 93121179A CN 1092390 A CN1092390 A CN 1092390A
- Authority
- CN
- China
- Prior art keywords
- cement
- raw material
- sulfate slag
- aluminium sulfate
- aluminium
- 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
- 239000004568 cement Substances 0.000 title claims abstract description 71
- 239000002994 raw material Substances 0.000 title claims abstract description 32
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 title claims abstract description 26
- 239000002893 slag Substances 0.000 title claims abstract description 26
- 229910000329 aluminium sulfate Inorganic materials 0.000 title claims abstract description 22
- 235000011128 aluminium sulphate Nutrition 0.000 title claims abstract description 22
- 239000000463 material Substances 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 239000002002 slurry Substances 0.000 title claims abstract description 13
- 239000011398 Portland cement Substances 0.000 claims abstract description 15
- 239000003245 coal Substances 0.000 claims abstract description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000000227 grinding Methods 0.000 claims abstract description 10
- 239000002131 composite material Substances 0.000 claims abstract description 8
- 239000010440 gypsum Substances 0.000 claims abstract description 7
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000002360 preparation method Methods 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- 239000004411 aluminium Substances 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- CQBLUJRVOKGWCF-UHFFFAOYSA-N [O].[AlH3] Chemical compound [O].[AlH3] CQBLUJRVOKGWCF-UHFFFAOYSA-N 0.000 claims description 3
- 239000002989 correction material Substances 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract description 6
- 238000009825 accumulation Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 7
- 238000012372 quality testing Methods 0.000 description 7
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 239000000395 magnesium oxide Substances 0.000 description 4
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 3
- 239000010428 baryte Substances 0.000 description 3
- 229910052601 baryte Inorganic materials 0.000 description 3
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 3
- 239000010436 fluorite Substances 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000005995 Aluminium silicate Substances 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 235000012211 aluminium silicate Nutrition 0.000 description 2
- PZZYQPZGQPZBDN-UHFFFAOYSA-N aluminium silicate Chemical compound O=[Al]O[Si](=O)O[Al]=O PZZYQPZGQPZBDN-UHFFFAOYSA-N 0.000 description 2
- 229910000323 aluminium silicate Inorganic materials 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 238000004448 titration Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 150000001851 cinnamic acid derivatives Chemical class 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 238000009355 double cropping Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 210000004884 grey matter Anatomy 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- CCEKAJIANROZEO-UHFFFAOYSA-N sulfluramid Chemical group CCNS(=O)(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F CCEKAJIANROZEO-UHFFFAOYSA-N 0.000 description 1
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
- C04B7/02—Portland cement
- C04B7/04—Portland cement using raw materials containing gypsum, i.e. processes of the Mueller-Kuehne type
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
- C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
- C04B7/17—Mixtures thereof with other inorganic cementitious materials or other activators with calcium oxide containing activators
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of cement production process of making cement slurry raw material and blended material with aluminium sulfate slag, it comprises that Wingdale, aluminium sulfate slag, iron powder, coal and mineralizer preparation help the black cement raw material, give through grinding and to add water and make full black cement raw material ball, add in the cement kiln and be fired into high-strength low consumption Portland clinker, cement clinker is added proper amount of gypsum and aluminium sulfate slag blended material grinding is made ordinary Portland cement, composite Portland cement or micro-aggregate Portland pozzolana cement.Aluminium sulfate slag is to produce the waste residue that discharge in the Tai-Ace S 150 chemical plant, and discarded the accumulation takies the good farmland, through the waste liquid seepage that drenches with rain, and a large amount of polluted agricultural lands, contaminate environment adopts the present invention to turn waste into wealth.
Description
The present invention relates to cement production process, especially relate to the cement production process of making cement slurry raw material and blended material with aluminium sulfate slag.
Cement industry is the rich and influential family of the consumption of natural resource and the energy, existing cement production process is by calcareous raw material (Wingdale), siliceous raw material (loess commonly used, clay, mud stone etc., the coal ash of using ash coal in recent years is for soil), iron, aluminium correction material (iron powder), the black cement raw material are helped in coal and mineralizer (fluorite, barite) preparation, give through grinding and to add water and make full black cement raw material ball, add in the cement kiln and be fired into high-strength low consumption Portland clinker.Cement clinker is added proper amount of gypsum and blended material is made ordinary Portland cement through grinding, composite Portland cement or micro-aggregate Portland pozzolana cement, at present, gather materials on the spot, comprehensively effectively utilize crude fuel inferior and surrogate, cut down the consumption of energy, firing high-strength grog, to produce cement of high index be main research topic and developing direction in the current Cement industry.
The purpose of this invention is to provide a kind of cement production process of making cement slurry raw material and blended material with aluminium sulfate slag.
The present invention is that the black cement raw material are helped in calcareous raw material, siliceous raw material, iron aluminium correction material, coal and mineralizer preparation, through ball mill grinding to fineness is that surplus is not more than 1% on the 0.2mm square hole sieve, 0.08mm surplus is not more than and adopts aluminium sulfate slag both to make siliceous raw material, the double cropping aluminum raw material in 10% cement slurry on the square hole sieve.Lime acid calcium titration value qualification rate is greater than 50%, the raw material powder reaches calcium sulfate titration value into kiln raw material powder greater than 70% through homogenizing, make raw material ball through pan-pelletizer, moisture content 10～14%, pellet diameter 3～10mm drops in the cement kiln and calcines, the kiln discharge grog enters clinker warehouse, its loss on ignition less than 1%.fCaO less than 3%, 28 day ultimate compression strength greater than 60MPa, the hear rate of burning till of comparable grog is 105～120kg mark/ton grog.Through the collocation of the many storehouses of grog, press an amount of gypsum and the pure aluminium silicate slag blended material of being produced of cement standard admixture, surplus is less than 8% to the 0.08mm square hole sieve through grinding, and three silica contents of cement are not more than 3%, and content of magnesia is not more than 5%.Cement slurry mesosilicic acid aluminium slag mass percent be 2～5, the mass percent of blended material pure aluminium silicate slag in ordinary Portland cement is 5～15 in the cement, and the mass percent in composite Portland cement or micro-aggregate Portland pozzolana cement is 10～20.It is value that cement clinker is controlled its rate: saturation ratio KH value is 0.9～0.94, and wherein 0.92 is preferable, and silicon rate n is 1.60～2.2, and wherein 1.7 is preferable, and aluminium-oxygen modulus P is 0.93～1.2, and wherein 1.0 is preferable.
Embodiment:
* * cement mill is with Wingdale, aluminium sulfate slag, coal, iron powder, fluorite, barite, and Microcomputerized dosing is through grinding, gives adding the water balling-up, calcination of cement clinker in the tower machine shaft kiln of φ 1.7 * 7m, grog label R28 reaches 65.2MPa.Grog 76.5%, gypsum 3.5%, aluminium sulfate slag 15% and Wingdale 5% are made micro-aggregate Portland pozzolana cement or composite Portland cement through grinding, and its R28 reaches 52.5MPa.Raw mix formula, raw ingredients and rate value, grog composition and rate value, mineralogical composition, the coal consumption of comparable grog mark, grog quality testing result, cement proportion and quality testing result thereof are as follows:
One. raw mix formula, composition and rate value
1. raw mix formula
Crude fuel title Wingdale Tai-Ace S 150 dross coal iron powder fluorite and barite
Ratio of components (%) 81.63 3.47 10.96 3.92 1.0 0.6
2. raw ingredients
Composition title nnn SiO
2Fe
2O
3Al
2O
3CaO MgO TCaCO
3
Per-cent 38.48 11.56 3.41 3.49 38.24 2.45 74.03
3. raw material rate value
Rate value title KH n P
Numerical value 0.968 1.68 1.02
Two. grog composition, rate value, mineralogical composition, the mark coal consumption of comparable grog and quality testing result
1. grog composition
Composition title nnn SiO
2Fe
2O
3Al
2O
3CaO MgO SO
3FCaO
Per-cent 0.56 18.68 5.56 5.52 61.48 3.97 1.60 2.55
2. grog rate value
Rate value title KH KH'n P
Numerical value 0.964 0.916 1.69 0.99
3. clinker mineral composition
Title C
3S C
2S C
3A C
4AF
Per-cent 53.07 10.34 5.17 16.89
4. comparable grog mark coal consumption (statistical value) 112kg mark coal/ton grog
5. grog quality testing result
Than the thick stability initial set of table standard final set
Time area degree water qualification rate time
m
2/ kg amount (%) is (time-division) (time-division) (%)
300 23.64 100 1:47 3:35
Folding strength (MPa) ultimate compression strength (MPa)
1 day 3 days 7 days 28 days 1 day 3 days 7 days 28 days
4.5 6.4 7.5 8.9 22.3 38.3 54.9 65.2
Three. micro-aggregate volcano grey matter cinnamic acid salt cement or composite Portland cement proportioning, quality testing result and ton cement power consumption
1. cement proportion
Name of material grog gypsum aluminium sulfate slag Wingdale
Per-cent 76.5 3.5 15 5
2. cement quality testing result
Name of material fuel gypsum aluminium sulfate slag Wingdale
Per-cent 76.5 3.5 15 5
2. cement quality testing result
The thick stability initial set of fineness standard final set SO
3MgO
Degree time water time
R
0.08% amount (%) (time-division) (time-division) is (%) (%)
6.6 25.84 qualified 2:22 4:42 2.52 3.88
Folding strength (MPa) ultimate compression strength (MPa)
3 days 7 days 28 days 3 days 7 days 28 days
5.2 6.3 7.8 28.3 38.1 52.5
3. ton cement power consumption 81.48kwh/t.
Advantage of the present invention: take * * cement plant is as example, adopt the present invention to compare with former technology, under the main process equipment same case, can increase production significantly consumption reduction, the unit-hour output of same φ 1.7 * 7mm tower machine vertical kiln grog is brought up to 2.94t/h from 2.62t/h, volume increase 12.2%, 28 days compression strength of grog label is brought up to 65.1MPa from 63.9MPa, improves 1.9%, and the coal consumption of grog mark is marked coal/ton grog by 122.33kg, be reduced to 112kg mark coal/ton grog, reduce by 8.4%; Produce composite Portland cement or micro-aggregate Portland pozzolana cement than producing the average fecund 10% of Portland cement, move per year 7000 hours meters, then increase production 5700 tons of cement, than former volume increase 26.9%, ton cement power consumption is reduced to 81.17kwh/t by 85.63kwh/t, reduce by 5.2%, the cement totle drilling cost is reduced to 187.33 yuan/t by 199.16 yuan/t, reduces by 5.19%. The aluminum sulfate slag is to produce the waste residue that discharge in the aluminum sulfate chemical plant, and discarded the accumulation takies the good farmland, and through the waste liquid seepage that drenches with rain, a large amount of polluted agricultural lands pollute environment, adopt the present invention to turn waste into wealth.
Claims (5)
1, a kind of cement production process of making cement slurry raw material and blended material with aluminium sulfate slag, it comprises calcareous raw material (Wingdale), siliceous raw material, iron, the black cement raw material are helped in aluminium correction material (iron powder) coal and mineralizer preparation, give through grinding and to add water and make full black cement raw material ball, add in the cement kiln and be fired into high-strength low consumption Portland clinker, cement clinker is added proper amount of gypsum and blended material is made ordinary Portland cement through grinding, composite Portland cement or micro-aggregate Portland pozzolana cement, it is characterized in that adopting in the cement slurry aluminium sulfate slag both to make siliceous raw material, make aluminium matter again and proofread and correct material, in cement, adopt aluminium sulfate slag simultaneously as cement mixture.
2, a kind of cement production process of making cement slurry raw material and blended material with aluminium sulfate slag according to claim 1, it is characterized in that the said mass percent of aluminium sulfate slag in ordinary Portland cement of not only having made siliceous raw material but also having made aluminum raw material is 2～5, the mass percent of blended material aluminium sulfate slag in ordinary Portland cement is 5～15 in the said cement, and the mass percent in composite Portland cement or micro-aggregate Portland pozzolana cement is 10～20.
3, a kind of cement production process of making cement slurry raw material and blended material with aluminium sulfate slag according to claim 1 and 2, it is characterized in that said cement clinker controls its rate value and be: saturation ratio KH value is 0.9～0.94, silicon rate n is 1.60～2.2, and aluminium-oxygen modulus P is 0.93～1.2.
4, according to claim 1 and 2ly a kind ofly make the cement production process of cement slurry raw material and blended material with aluminium sulfate slag, it is characterized in that said cement clinker controls its rate value and be: saturation ratio KH value is 0.92, and silicon rate n is 1.7, and aluminium-oxygen modulus P is 1.0.
5, according to claim 1 and 2ly a kind ofly make the cement production process of cement slurry raw material and blended material, it is characterized in that the hear rate of burning till of comparable grog is 105～120 kg mark coal/ton grog with aluminium sulfate slag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93121179A CN1092390A (en) | 1993-12-28 | 1993-12-28 | Make the cement production process of cement slurry raw material and blended material with aluminium sulfate slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93121179A CN1092390A (en) | 1993-12-28 | 1993-12-28 | Make the cement production process of cement slurry raw material and blended material with aluminium sulfate slag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1092390A true CN1092390A (en) | 1994-09-21 |
Family
ID=4993598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93121179A Pending CN1092390A (en) | 1993-12-28 | 1993-12-28 | Make the cement production process of cement slurry raw material and blended material with aluminium sulfate slag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1092390A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1048703C (en) * | 1995-06-08 | 2000-01-26 | 北京德高水泥新技术开发公司 | Cement resisting alkali-aggregate reation |
| CN1058688C (en) * | 1997-11-18 | 2000-11-22 | 谷士民 | Additive for cement and preparation process therefor |
| CN100418917C (en) * | 2007-02-27 | 2008-09-17 | 谭纪林 | Handling method for using aluminum sulfate slag as cement ingredient |
| WO2008145522A1 (en) * | 2007-05-30 | 2008-12-04 | Polysius Ag | Process and plant for producing cement |
| CN103484684A (en) * | 2013-10-16 | 2014-01-01 | 普曦峻 | No-pollution treatment method of electrolytic aluminum smelting aluminum slag |
| CN103539368A (en) * | 2013-10-17 | 2014-01-29 | 福建省建材进出口有限责任公司 | Method for producing cement by utilizing waste stone powder in stone industry |
| CN105585262A (en) * | 2014-10-20 | 2016-05-18 | 边宏光 | High-strength cement clinker and preparation method thereof |
| CN106977120A (en) * | 2017-05-26 | 2017-07-25 | 葛洲坝石门特种水泥有限公司 | A kind of white cement clinker and its calcining, cooling bleaching method |
-
1993
- 1993-12-28 CN CN93121179A patent/CN1092390A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1048703C (en) * | 1995-06-08 | 2000-01-26 | 北京德高水泥新技术开发公司 | Cement resisting alkali-aggregate reation |
| CN1058688C (en) * | 1997-11-18 | 2000-11-22 | 谷士民 | Additive for cement and preparation process therefor |
| CN100418917C (en) * | 2007-02-27 | 2008-09-17 | 谭纪林 | Handling method for using aluminum sulfate slag as cement ingredient |
| WO2008145522A1 (en) * | 2007-05-30 | 2008-12-04 | Polysius Ag | Process and plant for producing cement |
| CN103484684A (en) * | 2013-10-16 | 2014-01-01 | 普曦峻 | No-pollution treatment method of electrolytic aluminum smelting aluminum slag |
| CN103484684B (en) * | 2013-10-16 | 2015-03-25 | 普曦峻 | No-pollution treatment method of electrolytic aluminum smelting aluminum slag |
| CN103539368A (en) * | 2013-10-17 | 2014-01-29 | 福建省建材进出口有限责任公司 | Method for producing cement by utilizing waste stone powder in stone industry |
| CN103539368B (en) * | 2013-10-17 | 2015-07-08 | 福建省建材进出口有限责任公司 | Method for producing cement by utilizing waste stone powder in stone industry |
| CN105585262A (en) * | 2014-10-20 | 2016-05-18 | 边宏光 | High-strength cement clinker and preparation method thereof |
| CN105585262B (en) * | 2014-10-20 | 2017-12-05 | 边宏光 | A kind of high strength clinker and preparation method thereof |
| CN106977120A (en) * | 2017-05-26 | 2017-07-25 | 葛洲坝石门特种水泥有限公司 | A kind of white cement clinker and its calcining, cooling bleaching method |
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