CN103936315B - A kind of preparation method of modified active slag powders - Google Patents
A kind of preparation method of modified active slag powders Download PDFInfo
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- CN103936315B CN103936315B CN201410125375.0A CN201410125375A CN103936315B CN 103936315 B CN103936315 B CN 103936315B CN 201410125375 A CN201410125375 A CN 201410125375A CN 103936315 B CN103936315 B CN 103936315B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention discloses a kind of preparation method of modified active slag powders, its innovative point is: comprise the steps: in slag powders, add a small amount of steel-making slag powder, in the mixing solutions of water glass and sodium aluminate, soaks 12 days; Slag powders natural air drying after soaking, then dehydrated gypsum fully mixes, and then in shredder, grinds 50 ~ 80min, adds the steel ball that diameter is 50mm and 25mm in grinding machine for super; Select specific surface area and be greater than 460m
2the fine powder of/kg, specific surface area is less than 460m
2the meal of/kg returns continuation grinding; Select specific surface area and be greater than 460m
2the fine powder three-ring type roll mill of/kg carries out fine grinding, and obtaining specific surface area is 960 ~ 1200m
2/ kg, median size is 2 ~ 3.6 microns.It is simple that the present invention has preparation method, the advantage that cost is low, is applicable to engineer applied.
Description
Technical field
The invention belongs to Industrial Solid Waste application technology as the second resource field, be specifically related to a kind of preparation method of modified active slag powders.
Background technology
Slag is the primary solids waste of ferrous metals industry, has higher lateral reactivity.At present, slag is except in order to except operating mine slag cement, and its levigate slag powders that is prepared into can also use as concrete admixture by people.Slag micropowder is as concrete admixture, not only cement consumption can be saved, reduce concrete cost (every side about reduces by 10 ~ 20 yuan), the submicroscopic(al) structure in concrete can be improved simultaneously, improve the boundary strength between coarse aggregate and mortar, the kapillary of fill concrete inside, increases concrete later strength, and concrete properties is fully improved.In the society of current develop rapidly, slag micropowder, as concrete Additive, has obtained the accreditation of personages of various circles of society.
Summary of the invention
The object of the invention is to for deficiency of the prior art, a kind of preparation method of modified active slag powders is provided, there is preparation method simple, the advantage that cost is low.
For solving the problems of the technologies described above, the present invention adopts following technical scheme to realize: a kind of preparation method of modified active slag powders, is characterized in that: comprise the steps:
(1) in slag powders, add a small amount of steel-making slag powder, in the mixing solutions of water glass and sodium aluminate, soak 12 days;
(2) slag powders natural air drying after soaking, then adds dehydrated gypsum, fully mixes;
(3) roughly grind: the slag powders of step (2) is ground 50 ~ 80min in shredder, in grinding machine for super, adds the steel ball that diameter is 50mm and 25mm;
(4) screen: select specific surface area and be greater than 460m
2the fine powder of/kg, specific surface area is less than 460m
2the meal of/kg returns continuation grinding;
(5) fine grinding: select specific surface area and be greater than 460m
2the fine powder three-ring type roll mill of/kg carries out fine grinding, and obtaining specific surface area is 960 ~ 1200m
2/ kg, median size is 2 ~ 3.6 microns.
Further, the mass percent of described slag powders and steel-making slag powder is 85 ~ 95%:5 ~ 15%.
Further, the mixing solutions mesosilicic acid sodium of described water glass and sodium aluminate and the mass percent of sodium aluminate are 60 ~ 90%:10 ~ 40%.
Further, following component is comprised by ratio of quality and the number of copies in described slag powders: SiO
231.72, CaO33.47, Al
2o
317.53, Fe
2o
30.45, MgO11.32.
Further, following component is comprised by ratio of quality and the number of copies in described slag powders: CaO38.91, MgO6.61, Fe
2o
315.11, Al
2o
31.57, SiO
213.32.
Beneficial effect of the present invention: add a small amount of steel-making slag powder in slag powders of the present invention, two step polishings are adopted after soaking in the mixing solutions of water glass and sodium aluminate, in slag powders, be mixed into dehydration before the milling add dehydrated gypsum, obtaining specific surface area after grinding is 960 ~ 1200m
2/ kg, median size is the slag powders of 2 ~ 3.6 microns.It is simple that the present invention has preparation method, the advantage that cost is low, is applicable to engineer applied.
Embodiment
Below in conjunction with specific embodiment, technical scheme of the present invention is elaborated.
The raw material that the present invention adopts is slag powders and steel-making slag powder, wherein
Following component is comprised by ratio of quality and the number of copies: SiO in slag powders
231.72, CaO33.47, Al
2o
317.53, Fe
2o
30.45, MgO11.32.
Following component is comprised by ratio of quality and the number of copies: CaO38.91, MgO6.61, Fe in slag powders
2o
315.11, Al
2o
31.57, SiO
213.32.
Embodiment 1
A preparation method for modified active slag powders, is characterized in that: comprise the steps:
(1) in slag powders, add a small amount of steel-making slag powder, in the mixing solutions of water glass and sodium aluminate, soak 12 days, the mass percent of slag powders and steel-making slag powder is 85%:15%, and the mass percent of water glass and sodium aluminate is 60%:40%;
(2) slag powders natural air drying after soaking, then adds dehydrated gypsum, fully mixes;
(3) roughly grind: the slag powders of step (2) is ground 60min in shredder, in grinding machine for super, adds the steel ball that diameter is 50mm and 25mm;
(4) screen: select specific surface area and be greater than 460m
2the fine powder of/kg, specific surface area is less than 460m
2the meal of/kg returns continuation grinding;
(5) fine grinding: select specific surface area and be greater than 460m
2the fine powder three-ring type roll mill of/kg carries out fine grinding, and obtaining specific surface area is 960m
2/ kg, median size is 3.6 microns.
Embodiment 2
A preparation method for modified active slag powders, is characterized in that: comprise the steps:
(1) in slag powders, add a small amount of steel-making slag powder, in the mixing solutions of water glass and sodium aluminate, soak 12 days, the mass percent of slag powders and steel-making slag powder is 90%:10%, and the mass percent of water glass and sodium aluminate is 80%:20%;
(2) slag powders natural air drying after soaking, then adds dehydrated gypsum, fully mixes;
(3) roughly grind: the slag powders of step (2) is ground 80min in shredder, in grinding machine for super, adds the steel ball that diameter is 50mm and 25mm;
(4) screen: select specific surface area and be greater than 460m
2the fine powder of/kg, specific surface area is less than 460m
2the meal of/kg returns continuation grinding;
(5) fine grinding: select specific surface area and be greater than 460m
2the fine powder three-ring type roll mill of/kg carries out fine grinding, and obtaining specific surface area is 1120m
2/ kg, median size is 3.0 microns.
Embodiment 3
A preparation method for modified active slag powders, is characterized in that: comprise the steps:
(1) in slag powders, add a small amount of steel-making slag powder, in the mixing solutions of water glass and sodium aluminate, soak 12 days, the mass percent of slag powders and steel-making slag powder is 95%:5%, and the mass percent of water glass and sodium aluminate is 90%:10%;
(2) slag powders natural air drying after soaking, then adds dehydrated gypsum, fully mixes;
(3) roughly grind: the slag powders of step (2) is ground 60min in shredder, in grinding machine for super, adds the steel ball that diameter is 50mm and 25mm;
(4) screen: select specific surface area and be greater than 460m
2the fine powder of/kg, specific surface area is less than 460m
2the meal of/kg returns continuation grinding;
(5) fine grinding: select specific surface area and be greater than 460m
2the fine powder three-ring type roll mill of/kg carries out fine grinding, and obtaining specific surface area is 1200m
2/ kg, median size is 2 microns.
The performance index of the slag powders of embodiment 1 ~ 3 are in table 1.
The performance testing index of table 1 slag powders
Claims (5)
1. a preparation method for modified active slag powders, is characterized in that: comprise the steps:
(1) in slag powders, add a small amount of steel-making slag powder, in the mixing solutions of water glass and sodium aluminate, soak 12 days;
(2) slag powders natural air drying after soaking, then adds dehydrated gypsum, fully mixes;
(3) roughly grind: the slag powders of step (2) is ground 50 ~ 80min in shredder, in grinding machine for super, adds the steel ball that diameter is 50mm and 25mm;
(4) screen: select specific surface area and be greater than 460m
2the fine powder of/kg, specific surface area is less than 460m
2the meal of/kg returns continuation grinding;
(5) fine grinding: select specific surface area and be greater than 460m
2the fine powder three-ring type roll mill of/kg carries out fine grinding, and obtaining specific surface area is 960 ~ 1200m
2/ kg, median size is 2 ~ 3.6 microns.
2. the preparation method of a kind of modified active slag powders according to claim 1, is characterized in that: the mass percent of described slag powders and steel-making slag powder is 85 ~ 95%:5 ~ 15%.
3. the preparation method of a kind of modified active slag powders according to claim 1, is characterized in that: the mixing solutions mesosilicic acid sodium of described water glass and sodium aluminate and the mass percent of sodium aluminate are 60 ~ 90%:10 ~ 40%.
4. the preparation method of a kind of modified active slag powders according to claim 1, is characterized in that: comprise following component by ratio of quality and the number of copies in described slag powders: SiO
231.72, CaO33.47, Al
2o
317.53, Fe
2o
30.45, MgO11.32.
5. the preparation method of a kind of modified active slag powders according to claim 1, is characterized in that: comprise following component by ratio of quality and the number of copies in described slag powders: CaO38.91, MgO6.61, Fe
2o
315.11, Al
2o
31.57, SiO
213.32.
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CN105217975A (en) * | 2015-09-18 | 2016-01-06 | 江苏融达新材料股份有限公司 | The production method of a kind of vertical mill grinding ferronickel slag, slag composite powder |
CN106747150A (en) * | 2016-12-30 | 2017-05-31 | 重庆市富环建筑材料有限责任公司 | The double-doped miberal powder of high intensity |
CN112010617A (en) * | 2020-08-31 | 2020-12-01 | 常州坚鹏建材有限公司 | Durable stable steel slag-mineral powder concrete and preparation method thereof |
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CN101613190A (en) * | 2009-07-22 | 2009-12-30 | 济南鲁新新型建材有限公司 | Super-active slag powder and production method thereof |
CN102557508A (en) * | 2011-12-30 | 2012-07-11 | 重庆暄洁环保产业(集团)股份有限公司 | Composite activating agent for calcium raw material-high-silicon-aluminum industrial residue system |
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