CN107298537A - A kind of multiplicity reactivation iron tailings sand supplementary cementitious material and preparation method thereof - Google Patents
A kind of multiplicity reactivation iron tailings sand supplementary cementitious material and preparation method thereof Download PDFInfo
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- CN107298537A CN107298537A CN201710438296.9A CN201710438296A CN107298537A CN 107298537 A CN107298537 A CN 107298537A CN 201710438296 A CN201710438296 A CN 201710438296A CN 107298537 A CN107298537 A CN 107298537A
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- iron tailings
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 262
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 131
- 239000004576 sand Substances 0.000 title claims abstract description 69
- 239000000463 material Substances 0.000 title claims abstract description 53
- 230000007420 reactivation Effects 0.000 title claims abstract description 47
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 230000004913 activation Effects 0.000 claims abstract description 46
- 238000000227 grinding Methods 0.000 claims abstract description 31
- 239000000126 substance Substances 0.000 claims abstract description 27
- 239000011149 active material Substances 0.000 claims abstract description 17
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 239000004568 cement Substances 0.000 claims abstract description 11
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 8
- 239000010703 silicon Substances 0.000 claims abstract description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 59
- 238000001994 activation Methods 0.000 claims description 42
- 229910052681 coesite Inorganic materials 0.000 claims description 12
- 229910052906 cristobalite Inorganic materials 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 12
- 239000000377 silicon dioxide Substances 0.000 claims description 12
- 229910052682 stishovite Inorganic materials 0.000 claims description 12
- 229910052905 tridymite Inorganic materials 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 11
- 238000007725 thermal activation Methods 0.000 claims description 10
- 229910052910 alkali metal silicate Inorganic materials 0.000 claims description 9
- 239000010881 fly ash Substances 0.000 claims description 9
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 8
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 8
- 239000002893 slag Substances 0.000 claims description 7
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 7
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 6
- 150000002505 iron Chemical class 0.000 claims description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 235000019738 Limestone Nutrition 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 4
- 239000004615 ingredient Substances 0.000 claims description 4
- 239000006028 limestone Substances 0.000 claims description 4
- 230000000996 additive effect Effects 0.000 claims description 3
- 239000010883 coal ash Substances 0.000 claims description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 claims 1
- 239000011707 mineral Substances 0.000 claims 1
- 238000012216 screening Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 18
- 238000000034 method Methods 0.000 abstract description 12
- 230000008569 process Effects 0.000 abstract description 4
- 239000004567 concrete Substances 0.000 abstract description 3
- 230000001737 promoting effect Effects 0.000 abstract description 2
- 230000003213 activating effect Effects 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000003912 environmental pollution Methods 0.000 abstract 1
- 101100041681 Takifugu rubripes sand gene Proteins 0.000 description 45
- 238000005516 engineering process Methods 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910020489 SiO3 Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000010430 carbonatite Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910001919 chlorite Inorganic materials 0.000 description 1
- 229910052619 chlorite group Inorganic materials 0.000 description 1
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 229910052622 kaolinite Inorganic materials 0.000 description 1
- 229920005646 polycarboxylate Polymers 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000003516 soil conditioner Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 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
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/243—Mixtures thereof with activators or composition-correcting additives, e.g. mixtures of fly ash and alkali activators
-
- 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
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
- C04B7/42—Active ingredients added before, or during, the burning process
- C04B7/421—Inorganic materials
- C04B7/427—Silicates
-
- 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
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
-
- 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)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of multiplicity reactivation iron tailings sand supplementary cementitious material and preparation method thereof.Mainly solve thin iron tailings sand activating process and answer the technical problems such as single, efficiency is low, activation effect is poor, the multiplicity reactivation iron tailings sand supplementary cementitious material is made up of the thin iron tailings sand of high-silicon type, chemical addition agent and active material admixture activation.The invention also discloses the preparation method of multiplicity reactivation iron tailings sand supplementary cementitious material, it is made up of mechanical grinding chemical activation thermodynamics activation multiplicity reactivation process.The beneficial effects of the present invention are：The multiplicity reactivation iron tailings sand supplementary cementitious material preparation method that the present invention is provided can effectively excite the activity of the thin iron tailings sand of high-silicon type, iron tailings after multiplicity reactivation, which potentially acts as supplementary cementitious material, to be used in cement concrete and its associated components, improve the comprehensive utilization ratio of iron tailings, environmental pollution and ecological disruption are reduced, has good impetus to the sustainable development for promoting resource.
Description
Technical field
The present invention relates to civil engineering material technical field, and in particular to a kind of multiplicity reactivation iron tailings sand auxiliary gelling material
Material and preparation method thereof.
Background technology
With the development and the raising of technique of preparing level of China's steel industry, the quantum of output of iron tailings increases year by year, iron
Mine tailing be Iron Works Plant under the conditions of specific economic technology, iron ore is levigate, choose " useful constituent " solid for discharging afterwards or
The residue of powdery, the volume of cargo in storage of current China's iron tailings increases with the speed more than 300,000,000 tons every year more than 3,000,000,000 tons
Long, and it is stored up can take a large amount of soils, pollutes environment, destruction is ecological, also to there is disastrous water dirty for part Tailings Dam what is more
The dye even danger of dam break, therefore, the comprehensive utilization work for carrying out iron tailings is extremely urgent, improves its utilization rate for promoting me
The industrial development and sustainable development of state are significant.
The comprehensive utilization on iron tailings mainly includes at present：Spoil reclaming and valuable element recycle, it is mined out to fill
Area, as soil conditioner, prepare ceramics and construction material, bituminous paving multi-structural layer and the cement concrete product such as brick
Deng, but the utilization rate of iron tailings is still very low, only 7%, research is found, iron tailings sand also have similar to cement, flyash,
The activity of lime stone etc. (auxiliary) binder materials, but its activity is relatively low, it is impossible to supplementary cementitious material is directly used as, it is necessary to be lived
Change.
Exciting for iron tailings sand activity is its key factor as supplementary cementitious material, and exciting for iron tailings is divided into three
The mode of kind：Physical excitation, chemi-excitation and thermodynamics are excited.
Physical excitation is also known as mechanical excitation, mainly mechanical means, i.e., improve iron tailings by the levigate method of physics
Fineness, so as to improve its specific surface area, with the increase of specific surface area, material is tapped contacting surface with ambient water and also increase, from
And accelerate the speed of mine tailing aquation, improve the activity of mine tailing.Such as patent of invention CN102850011A《One kind utilizes iron tailings system
The process of standby RPC》A kind of method that iron tailings is activated using mechanical grinding means is disclosed, makes it
As the reactive powder component of RPC, but also, there are some researches show mechanical grinding can not improve the chemistry of iron tailings
Activity, iron tailings is main based on physics filing effect at normal temperatures.
Chemi-excitation is to improve the activity of iron tailings, such as patent of invention CN103011648A using some additives are added
《A kind of modified active iron tailing admixture for concrete and preparation method thereof》Disclose one kind and utilize polycarboxylate dehydragent pair
Iron tailings is carried out surface modification and improves its active method, the activity of the modification iron tailings active admixture produced using this method
It is suitable with second class powered coal ash, but it is difficult by alkali-activated carbonatite, only that sial material such as quartz, the chlorite of determinant are played in iron tailings
Its activity can just be excited by having under the compound conditions such as HTHP.
Thermodynamics excites i.e. high-temperature calcination to improve mine tailing activity, and Yi Zhong, which carrys out etc. have studied thermal activation iron tailings is gelled, to live
Property influence, as a result show in thermal activation process, the composition such as part kaolinite in iron tailings is decomposed, generation activity
SiO2With active Al2O3, the gelation activity of iron tailings is improved, but also there is more research to find, individually iron tailings is forged
Burn, it is impossible to improve iron tailings activity, active material need to be added and calcined with iron tailings, be just remarkably improved iron tailings activity,
Therefore, seek a kind of iron tailings sand activation method easily and effectively and excite its activity, and then be largely used as supplementary cementitious material, it is real
The comprehensive utilization of existing iron tailings seems more and more important.
The content of the invention
The invention aims to solve the problem of above-mentioned prior art is present, and then provide a kind of multiplicity reactivation iron tail
Ore in sand form supplementary cementitious material and preparation method thereof, solves the technology that technique is single, efficiency is low, activation effect is poor in existing method and asks
Topic, meanwhile, expand the popularization and application of iron tailings sand supplementary cementitious material, realize the sustainable use of industrial solid castoff.
The purpose of the present invention is achieved through the following technical solutions：A kind of multiplicity reactivation iron tailings sand auxiliary gelling material
Material, is mainly made up, the thin iron of described high-silicon type of the thin iron tailings sand of high-silicon type, chemical addition agent and active material admixture activation
CHARACTERISTICS OF TAILINGS SAND is SiO2The iron tailings sand of content 65%~85%；The chemical addition agent is alkali silicate, its percentage composition
For the 0.5%~5% of iron tailings sand content；The active material ingredients include flyash, slag powders.
Further, described active material specific surface area is 400m2/ kg~800m2/ kg, its percentage composition is iron tailings
The 50%~100% of sand content.
Further, described alkali silicate includes Na2SiO3。
Further, described active material ingredients include flyash, agstone.
Further, described chemical addition agent is to include Na2CO3Alkali carbonate.
A kind of preparation method of multiplicity reactivation iron tailings sand supplementary cementitious material, comprises the following steps,
Step 1: thin iron tailings sand is chosen：Choose SiO2Content is 65%~85% iron tailings sand, utilizes square hole screen pair
It is sieved, and it is activation target to sieve the thin iron tailings sand for taking granularity to be 0.075mm~0.6mm scopes, prepares auxiliary gelling material
Material；
Step 2: mechanical grinding is activated：Using cement ball mill, ratio of grinding media to material is 3:1 to 8:1, grinding time is 1h~3h,
Mechanical grinding is carried out to iron tailings sand, iron tailings is once activated；
Step 3: chemical activation：Being added in once activation iron tailings after mechanical grinding activation includes Na2SiO3Or
Na2CO3Alkali silicate or carbonate chemistry additive carry out chemical activation, the mixture proportion of chemical addition agent is once
The 0.5%~3% of iron tailings content is activated, re-activation iron tailings is obtained；
Step 4: thermodynamics is activated：By the re-activation iron tailings after mechanical grinding activation and chemical activation and bag
The active material for including flyash, slag powders or lime stone is mixed, and the mixed ratio of re-activation iron tailings and active material is 1:1 to
2:1, continue thermal activation treatment 1h~3h at 500 DEG C~800 DEG C, obtain final multiplicity reactivation iron tailings sand auxiliary gelling material
Material.
Brief description of the drawings
Fig. 1 is preparation flow figure of the present invention.
Embodiment
The present invention is described in further detail below：The present embodiment enters under premised on technical solution of the present invention
Row is implemented, and gives detailed embodiment, but protection scope of the present invention is not limited to following embodiments.
A kind of multiplicity reactivation iron tailings sand supplementary cementitious material, mainly by the thin iron tailings sand of high-silicon type, chemical addition agent with
And active material admixture activation is made, the thin iron tailings sand of described high-silicon type is SiO2The iron tailings sand of content 65%~85%；
The chemical addition agent is alkali silicate, and its percentage composition is the 0.5%~5% of iron tailings sand content；The active matter
Matter composition includes flyash, slag powders.
Further, described active material specific surface area is 400m2/ kg~800m2/ kg, its percentage composition is iron tailings
The 30%~100% of sand content.
Further, described alkali silicate includes Na2SiO3。
Further, described active material ingredients include agstone.
Further, described chemical addition agent is to include Na2CO3Alkali carbonate.
A kind of preparation method of multiplicity reactivation iron tailings sand supplementary cementitious material, comprises the following steps,
Step 1: thin iron tailings sand is chosen：Choose SiO2Content is 65%~85% iron tailings sand, utilizes square hole screen pair
It is sieved, and it is activation target to sieve the thin iron tailings sand for taking granularity to be 0.075mm~0.6mm scopes, prepares auxiliary gelling material
Material；
Step 2: mechanical grinding is activated：Using cement ball mill, ratio of grinding media to material is 3:1 to 8:1, grinding time is 1h~3h,
Mechanical grinding is carried out to iron tailings sand, iron tailings is once activated；
Step 3: chemical activation：Being added in once activation iron tailings after mechanical grinding activation includes Na2SiO3Or
Na2CO3Alkali silicate or carbonate chemistry additive carry out chemical activation, the mixture proportion of chemical addition agent is once
The 0.5%~3% of iron tailings content is activated, re-activation iron tailings is obtained；
Step 4: thermodynamics is activated：By the re-activation iron tailings after mechanical grinding activation and chemical activation and bag
The active material for including flyash, slag powders or lime stone is mixed, and the mixed ratio of re-activation iron tailings and active material is 1:1 to
2:1, continue thermal activation treatment 1h~3h at 500 DEG C~800 DEG C, obtain final multiplicity reactivation iron tailings sand auxiliary gelling material
Material.
Specifically, choosing SiO2Content is 65%~85% iron tailings sand, it is sieved using square hole screen, sieve takes
Granularity is that the thin iron tailings sand of 0.075mm~0.6mm scopes is activation target, carries out mechanical powder using cement ball mill first
Mill, ratio of grinding media to material is 5:1, grinding 2h, are once activated iron tailings；It is 2% that volume is added in once activation iron tailings afterwards
Na2SiO3Chemical activation is carried out, re-activation iron tailings is obtained；Finally by re-activation iron tailings and flyash with 1:1 ratio
Example mixing, continues thermal activation treatment 2h at 700 DEG C, obtains final multiplicity reactivation iron tailings sand supplementary cementitious material.
Embodiment 2
Choose SiO2Content is 65%~85% iron tailings sand, and it is sieved using square hole screen, and sieve takes the granularity to be
The thin iron tailings sand of 0.075mm~0.6mm scopes is activation target, carries out mechanical grinding, ball material using cement ball mill first
Than for 3:1, grinding 3h, are once activated iron tailings；The Na that volume is 2% is added in once activation iron tailings afterwards2CO3
Chemical activation is carried out, re-activation iron tailings is obtained；Finally by re-activation iron tailings and slag powders with 2:1 ratio mixing,
Continue thermal activation treatment 3h at 750 DEG C, obtain final multiplicity reactivation iron tailings sand supplementary cementitious material.
Embodiment 3
Choose SiO2Content is 65%~85% iron tailings sand, and it is sieved using square hole screen, and sieve takes the granularity to be
The thin iron tailings sand of 0.075mm~0.6mm scopes is activation target, carries out mechanical grinding, ball material using cement ball mill first
Than for 6:1, grinding 1.5h, are once activated iron tailings；It is 1% that volume is added in once activation iron tailings afterwards
Na2SiO3Chemical activation is carried out, re-activation iron tailings is obtained；Finally by re-activation iron tailings and agstone with 1:1 ratio
Example mixing, continues thermal activation treatment 2.5h at 600 DEG C, obtains final multiplicity reactivation iron tailings sand supplementary cementitious material.
Embodiment 4
Choose SiO2Content is 65%~85% iron tailings sand, and it is sieved using square hole screen, and sieve takes the granularity to be
The thin iron tailings sand of 0.075mm~0.6mm scopes is activation target, carries out mechanical grinding, ball material using cement ball mill first
Than for 5:1, grinding 2h, are once activated iron tailings；The Na that volume is 3% is added in once activation iron tailings afterwards2SiO3
Chemical activation is carried out, re-activation iron tailings is obtained；Finally by re-activation iron tailings and flyash with 2:1 ratio mixing,
Continue thermal activation treatment 1.5h at 800 DEG C, obtain final multiplicity reactivation iron tailings sand supplementary cementitious material.
Embodiment 5
A kind of final election takes SiO2Content is 65%~85% iron tailings sand, it is sieved using square hole screen, sieve takes
Granularity is that the thin iron tailings sand of 0.075mm~0.6mm scopes is activation target.Mechanical powder is carried out using cement ball mill first
Mill, ratio of grinding media to material is 8:1, grinding 1h, are once activated iron tailings；It is 3% that volume is added in once activation iron tailings afterwards
Na2CO3Chemical activation is carried out, re-activation iron tailings is obtained；Finally by re-activation iron tailings and agstone with 3:2
Ratio is mixed, and is continued thermal activation treatment 2.5h at 650 DEG C, is obtained final multiplicity reactivation iron tailings sand supplementary cementitious material.
The foregoing is only a preferred embodiment of the present invention, these embodiments are all based on the present invention
Different implementations under general idea, and protection scope of the present invention is not limited thereto, it is any to be familiar with the art
Technical staff the invention discloses technical scope in, the change or replacement that can be readily occurred in, should all cover the present invention
Within protection domain.Therefore, protection scope of the present invention should be defined by the protection domain of claims.
Claims (6)
1. a kind of multiplicity reactivation iron tailings sand supplementary cementitious material, mainly by the thin iron tailings sand of high-silicon type, chemical addition agent and
Active material admixture activation is made, it is characterised in that the thin iron tailings sand of described high-silicon type is SiO2Content 65%~85%
Iron tailings sand；The chemical addition agent is alkali silicate, and its percentage composition is the 0.5%~3% of iron tailings sand content；Institute
Stating active material ingredients includes flyash, slag powders.
2. multiplicity reactivation iron tailings sand supplementary cementitious material according to claim 1, it is characterised in that described active matter
Matter specific surface area is 400m2/ kg~800m2/ kg, its percentage composition is the 50%~100% of iron tailings sand content.
3. multiplicity reactivation iron tailings sand supplementary cementitious material according to claim 1, it is characterised in that described alkali metal
Silicate includes Na2SiO3。
4. multiplicity reactivation iron tailings sand supplementary cementitious material according to claim 1, it is characterised in that described active matter
Matter composition includes agstone.
5. multiplicity reactivation iron tailings sand supplementary cementitious material according to claim 1, it is characterised in that described chemistry adds
Plus agent is to include Na2CO3Alkali carbonate.
6. a kind of preparation method of multiplicity reactivation iron tailings sand supplementary cementitious material, it is characterised in that
Step 1: thin iron tailings sand is chosen：Choose SiO2Content is 65%~85% iron tailings sand, and it is entered using square hole screen
Row screening, it is activation target to sieve the thin iron tailings sand for taking granularity to be 0.075mm~0.6mm scopes, prepares supplementary cementitious material；
Step 2: mechanical grinding is activated：Using cement ball mill, ratio of grinding media to material is 3:1 to 8:1, grinding time is 1h~3h, to iron
CHARACTERISTICS OF TAILINGS SAND carries out mechanical grinding, is once activated iron tailings；
Step 3: chemical activation：Being added in once activation iron tailings after mechanical grinding activation includes Na2SiO3Or Na2CO3's
Alkali silicate or carbonate chemistry additive carry out chemical activation, and the mixture proportion of chemical addition agent is once activation iron tail
The 0.5%~3% of mineral content, obtains re-activation iron tailings；
Step 4: thermodynamics is activated：By the re-activation iron tailings after mechanical grinding activation and chemical activation with including powder
The mixed ratio of the active material mixing of coal ash, slag powders or lime stone, re-activation iron tailings and active material is 1:1 to 2:1,
Continue thermal activation treatment 1h~3h under the conditions of 500 DEG C~800 DEG C, obtain final multiplicity reactivation iron tailings sand auxiliary gelling material
Material.
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| CN111187010A (en) * | 2020-01-10 | 2020-05-22 | 安徽马钢嘉华新型建材有限公司 | Novel clinker-free high-performance low-cost composite cementing material |
| CN111196708A (en) * | 2020-01-10 | 2020-05-26 | 安徽马钢嘉华新型建材有限公司 | Mine underground filling mortar |
| CN111847924A (en) * | 2020-08-04 | 2020-10-30 | 武汉大学 | Tailing-based cementing material and preparation method thereof |
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| CN113200688A (en) * | 2021-04-14 | 2021-08-03 | 河南省宜居建材科技有限公司 | Method for preparing cementing material based on comprehensive tailings |
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