CN108178530A - A kind of slag base mineral admixture and preparation method and application - Google Patents
A kind of slag base mineral admixture and preparation method and application Download PDFInfo
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- CN108178530A CN108178530A CN201810031251.4A CN201810031251A CN108178530A CN 108178530 A CN108178530 A CN 108178530A CN 201810031251 A CN201810031251 A CN 201810031251A CN 108178530 A CN108178530 A CN 108178530A
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- 239000002893 slag Substances 0.000 title claims abstract description 105
- 229910052500 inorganic mineral Inorganic materials 0.000 title claims abstract description 53
- 239000011707 mineral Substances 0.000 title claims abstract description 53
- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- 239000000203 mixture Substances 0.000 claims abstract description 47
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 23
- 239000002802 bituminous coal Substances 0.000 claims abstract description 19
- 239000012298 atmosphere Substances 0.000 claims abstract description 13
- 239000011261 inert gas Substances 0.000 claims abstract description 12
- 239000010439 graphite Substances 0.000 claims abstract description 11
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 11
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000003830 anthracite Substances 0.000 claims abstract description 10
- 239000000571 coke Substances 0.000 claims abstract description 10
- 239000003077 lignite Substances 0.000 claims abstract description 10
- 238000001354 calcination Methods 0.000 claims description 25
- 238000001816 cooling Methods 0.000 claims description 14
- 239000000126 substance Substances 0.000 claims description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 229910052681 coesite Inorganic materials 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 6
- 229910052593 corundum Inorganic materials 0.000 claims description 6
- 229910052906 cristobalite Inorganic materials 0.000 claims description 6
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- 229910052682 stishovite Inorganic materials 0.000 claims description 6
- 229910052905 tridymite Inorganic materials 0.000 claims description 6
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 6
- 239000000470 constituent Substances 0.000 claims description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 24
- 238000001879 gelation Methods 0.000 abstract description 22
- 239000004568 cement Substances 0.000 abstract description 21
- 235000010755 mineral Nutrition 0.000 description 43
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 19
- 239000004570 mortar (masonry) Substances 0.000 description 12
- 238000000227 grinding Methods 0.000 description 11
- 239000002994 raw material Substances 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 238000010998 test method Methods 0.000 description 10
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 9
- 239000011575 calcium Substances 0.000 description 9
- 235000001465 calcium Nutrition 0.000 description 9
- 229910052791 calcium Inorganic materials 0.000 description 9
- 239000011083 cement mortar Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 239000012299 nitrogen atmosphere Substances 0.000 description 9
- 239000000843 powder Substances 0.000 description 9
- 229910052742 iron Inorganic materials 0.000 description 7
- 238000009628 steelmaking Methods 0.000 description 7
- 239000000292 calcium oxide Substances 0.000 description 6
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 6
- 238000001035 drying Methods 0.000 description 6
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 5
- 239000011396 hydraulic cement Substances 0.000 description 5
- 239000011777 magnesium Substances 0.000 description 5
- 229910052749 magnesium Inorganic materials 0.000 description 5
- 235000001055 magnesium Nutrition 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 241000876852 Scorias Species 0.000 description 4
- 238000009614 chemical analysis method Methods 0.000 description 4
- 235000013399 edible fruits Nutrition 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- ASTZLJPZXLHCSM-UHFFFAOYSA-N dioxido(oxo)silane;manganese(2+) Chemical compound [Mn+2].[O-][Si]([O-])=O ASTZLJPZXLHCSM-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229910052883 rhodonite Inorganic materials 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 229910052604 silicate mineral Inorganic materials 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910001341 Crude steel Inorganic materials 0.000 description 1
- 240000007817 Olea europaea Species 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 241000220317 Rosa Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000004645 aluminates Chemical class 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- JHLNERQLKQQLRZ-UHFFFAOYSA-N calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- 235000012241 calcium silicate Nutrition 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- BCAARMUWIRURQS-UHFFFAOYSA-N dicalcium;oxocalcium;silicate Chemical compound [Ca+2].[Ca+2].[Ca]=O.[O-][Si]([O-])([O-])[O-] BCAARMUWIRURQS-UHFFFAOYSA-N 0.000 description 1
- 235000021321 essential mineral Nutrition 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229920002959 polymer blend Polymers 0.000 description 1
- 229910052611 pyroxene Inorganic materials 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 229910021534 tricalcium silicate Inorganic materials 0.000 description 1
- 235000019976 tricalcium silicate Nutrition 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
- C04B5/00—Treatment of metallurgical slag ; Artificial stone from molten metallurgical slag
- C04B5/06—Ingredients, other than water, added to the molten slag or to the granulating medium or before remelting; Treatment with gases or gas generating compounds, e.g. to obtain porous slag
-
- 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
-
- 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)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention provides a kind of preparation methods of slag base mineral admixture, include the following steps：Mixture including slag and quenched modifying agent under atmosphere of inert gases is calcined, obtains slag base mineral admixture；Mixture of the quenched modifying agent for one or more of graphite, activated carbon, bituminous coal, anthracite, lignite, coke and gangue.The slag base mineral admixture and cement that preparation method provided by the present invention is obtained are using mass ratio as 3:7 ratio is made into cementitious material, it is tested using the gelling property of 17,671 1999 pairs of cementitious materials of GB/T, when conserving 7 days, gelation activity index is up to 97.1%, when conserving 28 days, gelation activity index illustrates that the mineral admixture that preparation method provided by the present invention obtains has excellent gelation activity up to 108%.
Description
Technical field
The present invention relates to slag recycling field more particularly to a kind of slag base mineral admixture and preparation method thereof with
Using.
Background technology
Slag is the waste residue discharged in steelmaking process, belongs to big argument industrial solid castoff.The discharge capacity of slag is general
About the 15%~20% of output of steel.From 2008, the crude steel annual output in China broke through 500,000,000 tons, reaches 8.08 within 2016
Hundred million tons, the same year, slag discharge capacity in China's was more than 100,000,000 tons.Big steel slag throws aside accumulation, not only polluted environment but also has occupied a large amount of
Soil, while cause the waste of resource.The essential mineral of slag forms：Tricalcium silicate, dicalcium silicate, calcium and magnesium olive
Stone, calcium and magnesium rhodonite, calcium aluminoferrite and silicon, magnesium, iron, manganese, phosphorus the solid solution that is formed of oxide, also containing a small amount of free
Calcium oxide etc., wherein silicate mineral have certain potential gelation activity, have exploitation as cement additive or concrete
The potential basis of admixture.However, relative to clinker, gelation activity mineral insufficient total amount in slag, there are a large amount of gellings
Nonactive mineral such as calcium aluminoferrite, calcium and magnesium rhodonite, and silicate mineral forms temperature height, compact crystallization, hydration rate delays
Slowly, cause gelation activity integrally relatively low；In addition, free CaO and RO have with respect to cement concrete volume stability in slag
Potential hazard.Disadvantage mentioned above seriously limits application of the slag as mineral admixture in cement concrete.
Invention content
The purpose of the present invention is to provide a kind of slag base mineral admixtures and preparation method and application.The present invention is carried
The slag base mineral admixture that the preparation method of confession obtains has excellent gelation activity, available in cement concrete.
To achieve the above object, the present invention provides a kind of preparation method of slag base mineral admixture, including walking as follows
Suddenly：
Raw mixture including slag and quenched modifying agent under atmosphere of inert gases is calcined, obtains slag base
Mineral admixture；
The quenched modifying agent is one kind or two in graphite, activated carbon, bituminous coal, anthracite, lignite, coke and gangue
Kind or more mixture.
Preferably, the quenched modifying agent is one kind or two in graphite, activated carbon, bituminous coal, anthracite, lignite and coke
Kind or more mixture and gangue compound.
Preferably, content of the gangue in compound be 0~5wt.%, not including content be 0 technical solution.
Preferably, the raw mixture is repressed obtained block.
Preferably, in the raw mixture, the content of slag is 80~95wt.%, the content of quenched modifying agent for 5~
20wt.%.
Preferably, in the raw mixture, the content of slag is 85~90wt.%, and the content of quenched modifying agent is 10
~15wt.%.
Preferably, the temperature of the calcining is 1200~1600 DEG C, and the time of the calcining is 0.5~2h.
Preferably, cooling is further included after the calcining, the cooling carries out under atmosphere of inert gases.
The present invention also provides a kind of slag base mineral admixtures, are prepared by above-mentioned technical proposal, the slag base
Mineral admixture includes the chemical constituent of following mass content：Fe 9~16.2wt.%, FeO0.02~7wt.%, Fe2O3
0.02~1.47wt.%, Al2O32.5~4wt.%, CaO 45~53wt.%, SiO213.5~15.2wt.% and MgO 7.5
~9wt.%.
The present invention also provides application of the above-mentioned slag base mineral admixture in cementitious material.
The present invention provides a kind of preparation methods of slag base mineral admixture, include the following steps：Will include slag and
The mixture of quenched modifying agent is calcined under atmosphere of inert gases, obtains slag base mineral admixture；The quenched modification
Mixture of the agent for one or more of graphite, activated carbon, bituminous coal, anthracite, lignite, coke and gangue.This hair
The bright mixture using one or more of graphite, activated carbon, bituminous coal, anthracite, lignite, coke and gangue is quenched
Modifying agent is calcined under atmosphere of inert gases, and a large amount of carbon is contained in above-mentioned quenched modifying agent, and carbon will in calcination process
Iron oxide in slag is reduced to fe, while the mineral composition monticellite of non-gelled activity, calcium and magnesium rose in slag
Pyroxene, calcium aluminoferrite phase and other siliceous, aluminium Solid solution decompositions, release calcium activated, silicon, aluminium, calcium activated, silicon, aluminium exist
Silicate and aluminate of the generation with gelation activity pair are reconfigured under high temperature, so as to obtain the excellent slag base of gelation activity
Mineral admixture.The slag base mineral admixture and cement that preparation method provided by the present invention is obtained are using mass ratio as 3:7
Ratio be made into cementitious material, the gelling property of cementitious material is tested using GB/T 17671-1999, maintenance 7 days when,
Gelation activity index is up to 97.1%, and when conserving 28 days, gelation activity index illustrates system provided by the present invention up to 108%
The mineral admixture that Preparation Method obtains has excellent gelation activity.
Specific embodiment
The present invention provides a kind of preparation methods of slag base mineral admixture, include the following steps：
Raw mixture including slag and quenched modifying agent under atmosphere of inert gases is calcined, obtains slag base
Mineral admixture；
The quenched modifying agent is one kind or two in graphite, activated carbon, bituminous coal, anthracite, lignite, coke and gangue
Kind or more mixture.
The present invention is not particularly limited the composition of the slag and source, the slag that common steelmaking process generates
It uses, usual slag includes the chemical constituent of following mass content：Fe2O315~25wt.%, 45~55wt.% of CaO, SiO2
10~20wt.%, Al2O31~8wt.%.In embodiments of the present invention, the slag preferably includes following mass content
Chemical constituent：Fe2O320~22wt.%, CaO48~50wt.%, SiO210~12wt.%, Al2O31~3wt.%, it is more excellent
It is selected as Fe2O321.81wt.%, CaO 49.66wt.%, SiO211.58wt.%, Al2O31.85wt.%.Of the invention real
It applies in example, the slag derives from Shaoguan Iron ＆ Steel Plant of Baoshan Iron and Steel Group.
In the present invention, the preferred ＜ 1wt.% of the water content of the slag.In the present invention, when the water content of slag raw material
When not within the above range, preferably the slag raw material is dried by the present invention, obtains slag of the water content in above range.
The present invention is not particularly limited the mode of the drying, can obtain the slag of required water content.
In the present invention, the grain size of the slag is preferably≤4.75mm, more preferably≤3mm；The Bo Shi of the slag
Specific surface area is preferably 200~350m2/ kg, more preferably 250~300m2/kg。
In the present invention, the quenched modifying agent is preferably in graphite, activated carbon, bituminous coal, anthracite, lignite and coke
One or more kinds of mixtures, more preferably one kind or two in graphite, activated carbon, bituminous coal, anthracite, lignite and coke
Kind or more mixture and gangue compound.In the present invention, in the compound content of gangue be preferably 0~
5wt.%, more preferably 0~1%, not including content be 0 technical solution.In the present invention, the quenched modifying agent mainly rises
To reduction, and promote the substance decomposition of non-gelled activity in slag.
In the present invention, the grain size of the quenched modifying agent is preferably≤4.75mm, more preferably≤2mm；It is described quenched
The Blain specific surface of modifying agent is preferably 200~350m2/ kg, more preferably 200~250m2/kg。
In the present invention, in the raw mixture, the content of slag is preferably 80~95wt.%, more preferably 85~
90wt.%.
In the present invention, in the raw mixture, the content of quenched modifying agent is preferably 5~20wt.%, more preferably
10~15wt.%.
In the present invention, the raw mixture of the slag and quenched modifying agent is repressed obtained block.At this
In invention, the form of the block is more advantageous to the reduction of iron oxide and the decomposition of non-gelled active matter in slag.
In the present invention, the block is preferably made by the steps to obtain：Raw mixture with water is mixed, is pressed
It is made as block.
In the present invention, the dosage of the water is preferably 3~10wt.% of raw mixture, more preferably 5~
8wt.%.
In the present invention, the pressure of the compacting is preferably 95~105KN, more preferably 100KN；The time of the compacting
For 20~40s, more preferably 30s；The time of the compacting is preferably when pressure needed for pressure reaches compacting meter.
The present invention is not particularly limited the shape of the block, can have any shape.
After the completion of compacting, compacting product is preferably dried to obtain block by the present invention.The present invention is to the mode of the drying
It is not particularly limited, the block of constant weight can be obtained.
In the present invention, the atmosphere of inert gases is preferably nitrogen or argon gas.In the present invention, the inert gas atmosphere
It encloses the iron that can be prevented former iron and be reduced out and is aoxidized.
In the present invention, the atmosphere of the calcining preferably obtains by the following method：First calcining device therefor is carried out very
Sky degassing, is then charged with inert gas.
In the present invention, the temperature of the calcining is preferably 1200~1600 DEG C, more preferably 1400~1500 DEG C；It is described
The time of calcining is preferably 0.5~2h, more preferably 1~1.5h.
After the completion of calcining, product of the present invention preferably by the calcining cools down.In the present invention, the cooling is preferred
It is cooled down for atmosphere of inert gases, more preferably nitrogen atmosphere cools down.In the present invention, it is described cooling in atmosphere of inert gases into
Row, can prevent former iron or the iron being reduced from being aoxidized in cooling procedure.The present invention is not special to the rate of the cooling
It limits, using conventional cooldown rate.
After the completion of cooling, the present invention is preferably crushed the product of the cooling successively, grinding, obtains slag base mineral
Admixture.
In the present invention, the Blain specific surface of the slag base mineral admixture is preferably 350~450m2/ kg, it is more excellent
It is selected as 400~420m2/kg。
The present invention is not particularly limited broken and grinding the mode and condition, can obtain required Bo Shi and compare table
Area.In embodiments of the present invention, the broken equipment is preferably jaw crusher.In embodiments of the present invention, institute
It is preferably ball milling to state grinding.
The present invention also provides a kind of slag base mineral admixtures, are prepared by above-mentioned technical proposal, the slag base
Mineral admixture includes the chemical constituent of following mass content：Fe 9~16.2wt.%, FeO0.02~7wt.%, Fe2O3
0.02~1.47wt.%, Al2O32.5~4wt.%, CaO 45~53wt.%, SiO213.5~15.2wt.% and MgO 7.5
~9wt.%.
The present invention also provides application of the above-mentioned slag base mineral admixture in cementitious material.
The present invention is not particularly limited concrete application mode of the slag base mineral admixture in cementitious material, this
Field technology personnel can use slag base mineral admixture as needed.
In the present invention, the cementitious material preferably includes slag base mineral admixture and cement.
In the present invention, content of the slag base mineral admixture in cementitious material is preferably 10~50wt.%, more
Preferably 30~40wt.%.
Below in conjunction with the embodiment in the present invention, the technical solution in the present invention is clearly and completely described.It is aobvious
So, described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.Based on the reality in the present invention
Apply example, those of ordinary skill in the art's all other embodiments obtained without making creative work all belong to
In the scope of protection of the invention.
The chemical composition of the slag and content are as shown in table 1 below in embodiments of the present invention：
The chemical composition and content of 1 slag of table
Embodiment 1
By slag after broken, grinding, it is respectively 260m to obtain Blain specific surface2The steel-making slag powder of/kg；According to matching as follows
Than preparing raw mixture：93wt.% steel-making slag powders, 7wt.% graphite powders；By the raw mixture and raw mixture
The water of 7wt.% is uniformly mixed, and slowly pressurizes through YAW-300B type cement forcing press and the material cake of Φ 12cm × 2cm, the pressure is made
The pressure of system is 100kN, and the time of compacting is 30s；Through drying, raw material block is obtained；
The raw material block is placed in high-temperature electric resistance furnace, high-temperature electric resistance furnace is subjected to vacuum outgas, nitrogen charging, Ran Hou successively
1400 DEG C are heated under nitrogen atmosphere, is calcined, the time of the calcining is 120min；
After the completion of the calcining, the product by the calcining is cooled to room temperature under nitrogen atmosphere；It will be described after cooling
Product obtains Blain specific surface as 400m through jaw crushing crusher machine, ball mill grinding2The slag base mineral admixture of/kg.
Using YB/T 140-2009《Slag chemical analysis method》Measure the chemical composition of slag base mineral admixture, knot
Fruit is as shown in table 2.
It is 7 by the mass ratio of reference cement and modified steel scoria:3 ratio is made into cementitious material, according to GB/T2419-2004
《Test method for fluidity of cement mortar》(GB/T 17671-1999)《Test method for strength of hydraulic cement mortar (ISO methods)》Respectively
Its mortar fluidity and cement mortar strength are measured, the results are shown in Table 3.
Embodiment 2
By slag and bituminous coal respectively after broken, grinding, it is respectively 260m to obtain Blain specific surface2/ kg and 230m2/kg
Steel-making slag powder and bituminous coal powder；Raw mixture is prepared according to following proportioning：90wt.% slags, 10wt.% bituminous coal；By the original
Material mixture is uniformly mixed with the water of the 7wt.% of raw mixture, and through YAW-300B type cement forcing press, slowly Φ is made in pressurization
The material cake of 12cm × 2cm, the pressure of the compacting is 100kN, and the time of compacting is 30s；Through drying, raw material block is obtained；
The raw material block is placed in high-temperature electric resistance furnace, high-temperature electric resistance furnace is subjected to vacuum outgas, nitrogen charging, Ran Hou successively
1400 DEG C are heated under nitrogen atmosphere, is calcined, the time of the calcining is 120min；
After the completion of the calcining, the product by the calcining is cooled to room temperature under nitrogen atmosphere；It will be described after cooling
Product obtains Blain specific surface as 400m through jaw crushing crusher machine, ball mill grinding2The slag base mineral admixture of/kg.
Using YB/T 140-2009《Slag chemical analysis method》Measure the chemical composition of slag base mineral admixture, knot
Fruit is as shown in table 2.
It is 7 by the mass ratio of reference cement and modified steel scoria:3 ratio is made into cementitious material, according to GB/T2419-2004
《Test method for fluidity of cement mortar》(GB/T 17671-1999)《Test method for strength of hydraulic cement mortar (ISO methods)》Respectively
Its mortar fluidity and cement mortar strength are measured, the results are shown in Table 3.
Embodiment 3
By slag and bituminous coal respectively after broken, grinding, it is respectively 260m to obtain Blain specific surface2/ kg and 230m2/kg
Steel-making slag powder and bituminous coal powder；Raw mixture is prepared according to following proportioning：85wt.% slags, 15wt.% bituminous coal；By the original
Material mixture is uniformly mixed with the water of the 8wt.% of raw mixture, and through YAW-300B type cement forcing press, slowly Φ is made in pressurization
The material cake of 12cm × 2cm, the pressure of the compacting is 100kN, and the time of compacting is 30s；Through drying, raw material block is obtained；
The raw material block is placed in high-temperature electric resistance furnace, high-temperature electric resistance furnace is subjected to vacuum outgas, nitrogen charging, Ran Hou successively
1400 DEG C are heated under nitrogen atmosphere, is calcined, the time of the calcining is 120min；
After the completion of the calcining, the product by the calcining is cooled to room temperature under nitrogen atmosphere；It will be described after cooling
Product obtains Blain specific surface as 400m through jaw crushing crusher machine, ball mill grinding2The slag base mineral admixture of/kg.
Using YB/T 140-2009《Slag chemical analysis method》Measure the chemical composition of slag base mineral admixture, knot
Fruit is as shown in table 2.
It is 7 by the mass ratio of reference cement and modified steel scoria:3 ratio is made into cementitious material, according to GB/T2419-2004
《Test method for fluidity of cement mortar》(GB/T 17671-1999)《Test method for strength of hydraulic cement mortar (ISO methods)》Respectively
Its mortar fluidity and cement mortar strength are measured, the results are shown in Table 3.
Embodiment 4
By slag and bituminous coal respectively after broken, grinding, it is respectively 260m to obtain Blain specific surface2/ kg and 230m2/kg
Steel-making slag powder and bituminous coal powder；Raw mixture is prepared according to following proportioning：80wt.% slags, 20wt.% bituminous coal；By the original
Material mixture is uniformly mixed with the water of the 9wt.% of raw mixture, and through YAW-300B type cement forcing press, slowly Φ is made in pressurization
The material cake of 12cm × 2cm, the pressure of the compacting is 100kN, and the time of compacting is 30s；Through drying, raw material block is obtained；
The raw material block is placed in high-temperature electric resistance furnace, high-temperature electric resistance furnace is subjected to vacuum outgas, nitrogen charging, Ran Hou successively
1400 DEG C are heated under nitrogen atmosphere, is calcined, the time of the calcining is 120min；
After the completion of the calcining, the product by the calcining is cooled to room temperature under nitrogen atmosphere；It will be described after cooling
Product obtains Blain specific surface as 400m through jaw crushing crusher machine, ball mill grinding2The slag base mineral admixture of/kg.
Using YB/T 140-2009《Slag chemical analysis method》Measure the chemical composition of slag base mineral admixture, knot
Fruit is as shown in table 2.
It is 7 by the mass ratio of reference cement and modified steel scoria:3 ratio is made into cementitious material, according to GB/T2419-2004
《Test method for fluidity of cement mortar》(GB/T 17671-1999)《Test method for strength of hydraulic cement mortar (ISO methods)》Respectively
Its mortar fluidity and cement mortar strength are measured, the results are shown in Table 3.
Comparative example 1
By following proportioning with preparing coagulation material：Reference cement 70wt.%, slag 30wt.%, according to GB/T2419-2004
《Test method for fluidity of cement mortar》(GB/T 17671-1999)《Test method for strength of hydraulic cement mortar (ISO methods)》It carries out
Glue sand performance test, using the flexural strength of reference cement and compression strength as standard, the gelation activity for calculating maintenance 7d and 28d refers to
Number, the results are shown in Table 3.
The chemical composition of slag base mineral admixture obtained by 2 Examples 1 to 4 of table
The mortar fluidity and gelation activity of 3 Examples 1 to 4 of table, comparative example 1 and reference cement
By the data of table 2 it is found that Fe in slag base mineral admixture2O3Content it is relatively low, Fe contents are higher, illustrate process
Preparation method provided by the present invention, the Fe in slag2O3It is reduced.
By the mortar fluidity test result in table 3 it is found that the slag Ji Kuang that preparation method provided by the present invention obtains
The mortar fluidity of polymer blends material is not reduced relative to slag raw material, is increased instead, even higher than the glue of reference cement
Sand fluidity, corresponding water requirement are also reduced.
By the gelation activity test result of table 3 it is found that slag base mineral admixture provided by the present invention is with excellent
Gelation activity, the mineral admixture that preparation method provided by the present invention is obtained is with cement using mass ratio as 3:7 ratio is matched
Into cementitious material, when conserving 7 days, gelation activity index is 81.7~97.1%, and when conserving 28 days, gelation activity index is reachable
96.6~108%, i.e., in the case where the amount of the addition of mineral admixture is larger, the gelation activity of gained cementitious material still with
Reference cement is suitable, even more excellent；Its gelation activity index is the gelling prepared using slag as admixture under active the same terms
1.3 times or more of the gelation activity index of material, relative to original slag, slag base mineral admixture provided by the present invention
Gelation activity is significantly improved.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of preparation method of slag base mineral admixture, includes the following steps：
Raw mixture including slag and quenched modifying agent under atmosphere of inert gases is calcined, obtains slag base mineral
Admixture；
The quenched modifying agent for one or both of graphite, activated carbon, bituminous coal, anthracite, lignite, coke and gangue with
On mixture.
2. preparation method as described in claim 1, which is characterized in that the quenched modifying agent for graphite, activated carbon, bituminous coal,
The mixture of one or more of anthracite, lignite and coke and the compound of gangue.
3. preparation method as claimed in claim 2, which is characterized in that in the compound content of gangue for 0~
5wt.%, not including content be 0 technical solution.
4. preparation method as described in claim 1, which is characterized in that the raw mixture is repressed obtained bulk
Object.
5. such as Claims 1 to 4 any one of them preparation method, which is characterized in that in the raw mixture, slag contains
It measures as 80~95wt.%, the content of quenched modifying agent is 5~20wt.%.
6. preparation method as claimed in claim 5, which is characterized in that in the raw mixture, the content of slag for 85~
90wt.%, the content of quenched modifying agent is 10~15wt.%.
7. preparation method as described in claim 1, which is characterized in that the temperature of the calcining is 1200~1600 DEG C, described
The time of calcining is 0.5~2h.
8. preparation method as described in claim 1, which is characterized in that cooling is further included after the calcining, the cooling is lazy
It is carried out under property atmosphere.
9. a kind of slag base mineral admixture is prepared, the steel by claim 1~8 any one of them preparation method
Slag base mineral admixture includes the chemical constituent of following mass content：Fe 0.02~7wt.% of 9~16.2wt.%, FeO,
Fe2O30.02~1.47wt.%, Al2O32.5~4wt.%, CaO 45~53wt.%, SiO213.5~15.2wt.% and
7.5~9wt.% of MgO.
10. application of the slag base mineral admixture in cementitious material described in claim 9.
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| CN113754391A (en) * | 2021-08-12 | 2021-12-07 | 河北工程大学 | Self-compacting light waste concrete and preparation method thereof |
| CN116535148A (en) * | 2023-05-06 | 2023-08-04 | 西安建筑科技大学 | Method for cooperatively treating carbon-containing gangue and steel slag |
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