CN102701614B - High-strength cement preparation method - Google Patents
High-strength cement preparation method Download PDFInfo
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- CN102701614B CN102701614B CN2012100018788A CN201210001878A CN102701614B CN 102701614 B CN102701614 B CN 102701614B CN 2012100018788 A CN2012100018788 A CN 2012100018788A CN 201210001878 A CN201210001878 A CN 201210001878A CN 102701614 B CN102701614 B CN 102701614B
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- Prior art keywords
- cement
- sandy soil
- gained
- preparation
- semi
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- 239000004568 cement Substances 0.000 title claims abstract description 47
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000002689 soil Substances 0.000 claims abstract description 23
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 19
- 239000010440 gypsum Substances 0.000 claims abstract description 19
- 239000002893 slag Substances 0.000 claims abstract description 18
- 239000003245 coal Substances 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 239000000843 powder Substances 0.000 claims abstract description 12
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 238000001354 calcination Methods 0.000 claims abstract description 8
- 238000000227 grinding Methods 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 229910001448 ferrous ion Inorganic materials 0.000 claims description 17
- -1 ferrous ion compound Chemical class 0.000 claims description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 11
- 239000011505 plaster Substances 0.000 claims description 11
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 239000006227 byproduct Substances 0.000 claims description 3
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 3
- 239000011790 ferrous sulphate Substances 0.000 claims description 3
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 claims description 3
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 3
- 229910021506 iron(II) hydroxide Inorganic materials 0.000 claims description 3
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 3
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000004576 sand Substances 0.000 abstract description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical class [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract description 3
- 239000004566 building material Substances 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 abstract 2
- 238000002156 mixing Methods 0.000 abstract 2
- 238000004519 manufacturing process Methods 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 229940125904 compound 1 Drugs 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000003469 silicate cement Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- Processing Of Solid Wastes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
A high-strength cement preparation method includes the steps: (1) levigating steel slag; (2) dehydrating desulfurized gypsum to hemihydrate gypsum; (3) mixing sand soil, coal and ferrous ion compounds with the hemihydrate gypsum; (4) adding the obtained mixture into a grinding pre-heater for grinding and preheating; (5) adding the mixture processed via the step (4) into a rotary kiln for calcining so that cement clinker and sulfur dioxide gas are obtained; and (6) cooling the cement clinker obtained at the step (5), and then mixing the desulfurized gypsum, the sand soil, the steel slag powder obtained at the step (1) and the cement clinker obtained at the step (5). According to the high-strength cement preparation method, waste resources of enterprises are effectively used, environmental protection pressure of steel power enterprises is relieved, and the problem of resource shortage of building material enterprises can be also solved. Cement products prepared by the method are high in strength and particularly applicable to places with high requirements on cement strength.
Description
Technical field
The present invention relates to a kind of preparation method of cement, especially relate to a kind of preparation method of high strength cement.
Background technology
China produces more than 500,000,000 ton of cement per year, and 80% is shaft kiln production, and shaft kiln production is limited by processing condition, and the strength of cement that grinds is lower, and quality is lower, can't reach the service requirements in some place.Although existing manufacture of cement has made some improvements, all fundamentally do not solve the quality problems of strength of cement.
At present, new cement national standard is revised and implements, and new national standard carries out ruggedness test according to international ISO method, and because water cement ratio, cement-sand ratio, standard sand etc. change, strength of cement originally will reduce a grade according to new standard.
Some Code in Hazardous Special Locations such as Fang Hai, anti-river levee dam etc., can only use high strength cement, but the cement of traditional gypsum production can not satisfy high-intensity requirement.
In steelmaking process, can produce large steel slag in steel melting furnace, for steelworks, this class material abandons stacking mostly, both land occupation resource, contaminate environment again.
Summary of the invention
The technical problem to be solved in the present invention is, overcomes the deficiencies in the prior art, and a kind of preparation method of high strength cement is provided.
The present invention solve the technical problem the technical scheme that adopts, and comprises the following steps:
(1) with levigating steel slag, grind size is that 0.30mm tails over less than 5%, gets the slag powder;
(2) with the desulfurated plaster dehydration, generate semi-hydrated gypsum;
(3) sandy soil, coal, ferrous ion compound and step (2) gained semi-hydrated gypsum are mixed, get the mixture of sandy soil, coal, ferrous ion compound and semi-hydrated gypsum;
The weight percent of described semi-hydrated gypsum, sandy soil, coal and ferrous ion compound is: semi-hydrated gypsum 75-85%, sandy soil 5-15%, ferrous ion compound 0.5-2%, coal 8-15%;
(4) step (3) gained mixture is joined grind in preheater and grind, grind size is that 0.10mm tails over 15-18%; 0.20mm tail over less than 2%; When grinding, mixture is carried out preheating, preheating temperature is 600-750 ℃;
(5) will add in rotary kiln through the mixture that step (4) is processed and calcine, calcining temperature is 900-1550 ℃ (preferred 1500 ℃), forges to pass into air when watering (flow that preferably passes into air is 1-1.2m
3/ h), get cement clinker and by product sulfur dioxide gas;
(6) step (5) gained cement clinker is cooling, then be slag powder 35-65% with step (1) gained slag powder, desulfurated plaster, step (5) gained cement clinker, sandy soil according to weight percent, desulfurated plaster 15-35%, cement clinker 3-8%, the ratio of sandy soil 10-45% is mixed, stir, namely get high strength cement.
Described ferrous ion compound is iron protoxide (FeO), ferrous hydroxide (Fe (OH)
2), ferrous sulfate (FeSO
4) or iron protochloride (FeCl
2) etc. the compound of ferrous ion.
The preparation method of the present invention's high strength cement effectively utilizes the waste resource of enterprise, has both alleviated the pressure of iron and steel electric power enterprise environmental protection, can solve again the problem of building materials enterprise shortage of resources; The by product sulfur dioxide gas can be used for preparing sulfuric acid.
The preparation method of the present invention's high strength cement, the cement products that makes, intensity is high, has reached the index request of GB13590-2006 " slag silicate cement ", and namely time of coagulation, initial set was not less than 90min, and final set is not more than 600min; Stability is qualified; 3 days ultimate compression strength is more than or equal to 10MPa, and ultimate compression strength was more than or equal to 32.5MPa in 28 days; 3 days folding strengths are more than or equal to 2.5MPa, and 28 days folding strengths are more than or equal to 5.5MPa, and specific surface area is not less than 38m
2/ kg; Contract with dry rate was not more than 0.1% in 28 days.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment 1
The present embodiment comprises the following steps:
(1) with levigating steel slag, grind size is that 0.30mm tails over less than 5%, gets the slag powder;
(2) with the desulfurated plaster dehydration, generate semi-hydrated gypsum;
(3) sandy soil, coal, iron protoxide and step (2) gained semi-hydrated gypsum is mixed, get the mixture of sandy soil, coal, ferrous ion compound and semi-hydrated gypsum;
The weight percent of described semi-hydrated gypsum, sandy soil, coal and iron protoxide is: semi-hydrated gypsum 80%, sandy soil 10%, ferrous ion compound 1%, coal 9%;
(4) step (3) gained mixture is joined grind in preheater and grind, grind size is that 0.10mm tails over 15-18%; 0.20mm tail over less than 2%; When grinding, mixture is carried out preheating, preheating temperature is 600 ℃;
(5) will add in rotary kiln through the mixture that step (4) is processed and calcine, calcining temperature is 900 ℃, forges to pass into air when watering (flow that passes into air is 1.0m
3/ h), get cement clinker and sulfur dioxide gas;
(6) step (5) gained cement clinker is cooling, then desulfurated plaster, sandy soil, step (1) gained slag powder and step (5) gained cement clinker are mixed, stir, namely get high strength cement;
The weight percent of step (1) gained slag powder, desulfurated plaster and step (5) gained cement clinker, sandy soil is: slag powder 35%, desulfurated plaster 35%, cement clinker 5%, sandy soil 25%.
The raw material weight proportioning of embodiment 2-4 and preheating temperature, calcining temperature are listed in table 1, and other steps are identical with embodiment 1.
Embodiment 2 ferrous ion compound used is ferrous hydroxide; Embodiment 3 ferrous ion compound used is ferrous sulfate, and embodiment 4 ferrous ion compound used is iron protochloride.
The high strength cement analytical test of embodiment 1-4 preparation the results are shown in Table 2.
Table 1 embodiment 1-4 raw material weight proportioning and Parameter Conditions
| Sequence number | Semi-hydrated gypsum | Sandy soil | The ferrous ion compound | Coal | Preheating temperature (℃) | Calcining temperature (℃) | The slag powder | Desulfurated plaster | Cement clinker | Sandy soil | Pass into the flow of air |
| Embodiment 1 | 80 | 10 | 1 | 9 | 600 | 900 | 35 | 35 | 5 | 25 | 1.0 |
| Embodiment 2 | 75 | 15 | 2 | 8 | 700 | 1300 | 65 | 15 | 3 | 17 | 1.1 |
| Embodiment 3 | 85 | 5 | 0.5 | 9.5 | 750 | 1200 | 57 | 26 | 7 | 10 | 1.2 |
| Embodiment 4 | 78 | 8 | 1 | 13 | 720 | 1550 | 37 | 15 | 3 | 45 | 1.0 |
The high strength cement analytical test result of table 2 embodiment 1-4 preparation
Claims (4)
1. the preparation method of a high strength cement, is characterized in that, comprises the following steps:
(1) with levigating steel slag, grind size is that 0.30mm tails over less than 5%, gets the slag powder;
(2) with the desulfurated plaster dehydration, generate semi-hydrated gypsum;
(3) sandy soil, coal, ferrous ion compound and step (2) gained semi-hydrated gypsum are mixed, get the mixture of sandy soil, coal, ferrous ion compound and semi-hydrated gypsum;
The weight percent of described semi-hydrated gypsum, sandy soil, coal and ferrous ion compound is: semi-hydrated gypsum 75-85%, sandy soil 5-15%, ferrous ion compound 0.5-2%, coal 8-15%;
(4) step (3) gained mixture is joined grind in preheater and grind, grind size is that 0.10mm tails over 15-18%; 0.20mm tail over less than 2%; When grinding, mixture is carried out preheating, preheating temperature is 600-750 ℃;
(5) will add in rotary kiln through the mixture that step (4) is processed and calcine, calcining temperature is 900-1550 ℃, passes into air in the time of calcining, gets cement clinker and by product sulfur dioxide gas;
(6) step (5) gained cement clinker is cooling, then be slag powder 35-65% with desulfurated plaster, step (1) gained slag powder, step (5) gained cement clinker, sandy soil according to weight percent, desulfurated plaster 15-35%, cement clinker 3-8%, the ratio of sandy soil 10-45% is mixed, stir, namely get high strength cement.
2. the preparation method of high strength cement according to claim 1, is characterized in that, in step (5), the flow that passes into air is 1-1.2m
3/ h.
3. the preparation method of high strength cement according to claim 1 and 2, is characterized in that, in step (5), calcining temperature is 1500 ℃.
4. the preparation method of high strength cement according to claim 1 and 2, is characterized in that, described ferrous ion compound is iron protoxide, ferrous hydroxide, ferrous sulfate or iron protochloride.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100018788A CN102701614B (en) | 2012-01-05 | 2012-01-05 | High-strength cement preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100018788A CN102701614B (en) | 2012-01-05 | 2012-01-05 | High-strength cement preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102701614A CN102701614A (en) | 2012-10-03 |
| CN102701614B true CN102701614B (en) | 2013-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100018788A Active CN102701614B (en) | 2012-01-05 | 2012-01-05 | High-strength cement preparation method |
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| CN (1) | CN102701614B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106746996B (en) * | 2016-12-20 | 2019-05-31 | 安徽建筑大学 | A kind of steel slag composite concrete and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1785878A (en) * | 2004-12-12 | 2006-06-14 | 攀钢集团钢城企业总公司废旧物资分公司 | Method of using vanadium titanium rotary furnace steel slag as cement iron correction material |
| CN102173609A (en) * | 2011-01-04 | 2011-09-07 | 段力为 | Cement and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69324189T2 (en) * | 1992-05-25 | 1999-07-22 | Hoop Terneuzen B V De | Cement composition and method of making the same |
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2012
- 2012-01-05 CN CN2012100018788A patent/CN102701614B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1785878A (en) * | 2004-12-12 | 2006-06-14 | 攀钢集团钢城企业总公司废旧物资分公司 | Method of using vanadium titanium rotary furnace steel slag as cement iron correction material |
| CN102173609A (en) * | 2011-01-04 | 2011-09-07 | 段力为 | Cement and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN102701614A (en) | 2012-10-03 |
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Effective date of registration: 20160816 Address after: An industrial park, 415200 Hunan Linli County Economic Development Zone Patentee after: Hunan Fu Xiang new type building material Co., Ltd. Address before: 410005, 12 floor, Haidong mansion, Furong Road, Changsha, Hunan Patentee before: Liu Liwen |