CN104446045A - Alkali-activated cementing material and preparation method thereof - Google Patents

Alkali-activated cementing material and preparation method thereof Download PDF

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CN104446045A
CN104446045A CN201410618006.5A CN201410618006A CN104446045A CN 104446045 A CN104446045 A CN 104446045A CN 201410618006 A CN201410618006 A CN 201410618006A CN 104446045 A CN104446045 A CN 104446045A
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alkali
iron tailings
activated carbonatite
powder
carbonatite gelling
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CN201410618006.5A
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CN104446045B (en
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李北星
叶茂
冯紫豪
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武汉理工大学
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/10Production of cement, e.g. improving or optimising the production methods; Cement grinding

Abstract

The invention relates to an alkali-activated cementing material prepared from siliceous iron tailings and a preparation method of the alkali-activated cementing material. The preparation method comprises the following steps: 1) proportionally and evenly mixing siliceous iron tailing powder, coal ash and slag powder together to obtain iron tailing powder-coal ash-slag powder compound powder; 2) mixing liquid water glass with water to obtain an alkali activating agent solution; 3) adding the alkali activating agent solution to the compound powder and stirring evenly to obtain an alkali-activated cementing material paste; 4) injecting the alkali-activated cementing material paste into a die for vibrating molding and maintaining under a normal temperature condition until knockout, thereby obtaining an alkali-activated cementing material net paste test piece; and 5) performing steam curing on the alkali-activated cementing material net paste test piece. The alkali-activated cementing material has the beneficial effects that the alkali-activated cementing material hardened paste has excellent mechanical properties, the 3d compressive strength of the optimal proportion of the hardened paste is greater than 60MPa and the 28d compressive strength of the hardened paste is greater than 80MPa.

Description

A kind of alkali-activated carbonatite gelling material and preparation method thereof
Technical field
The invention belongs to building material field, particularly relate to a kind of alkali-activated carbonatite gelling material utilizing siliceous iron tailings to prepare and preparation method thereof.
Background technology
China accumulates at present and stores up mine tailing 10,000,000,000 more than t, year quantum of output reach 1,200,000,000 t, account for that national large industrial solid castoff year produces total amount 45.8%, account for more than 50% of whole world mine tailing quantum of output.Compared with large industrial solid castoff such as flyash, coal gangue, the comprehensive utilization technique of mine tailing is more complicated, difficulty is larger.At present, the comprehensive utilization ratio of China's mine tailing only has 13.3%, and by contrast, the comprehensive utilization of mine tailing lags behind other large industrial solid castoff greatly.Wherein, the generation of iron tailings is maximum, and in China, all kinds of mine tailing generation proportion reaches 45%, and annual emissions rises to 5.36 hundred million tons in 2009 fast from 1.37 hundred million t of 2000, and only the accumulative generation of 10 years just reaches 28.32 hundred million tons.Iron tailings store up the waste not only occupying soil He cause resource in a large number, and the airborne dust etc. caused containing the objectionable impuritiess such as heavy metal and thin tailings particles in part iron tailings brings severe contamination and harm to groundwater resource, human habitat, destroy the eubiosis, be now subject to the extensive concern of the whole society.
The mineral composition of iron tailings is mainly constitutionally stable gangue mineral, as quartz, feldspar, pyroxene, garnet, hornblende etc., almost there is no activity, simultaneously along with the raising of technique of preparing, the median of mine tailing is down to present 40 μm by first 200 μm of more than ten years, is also not suitable for even if be used as its particle diameter of concrete aggregate.Therefore, greatly limit its approach of dissolving.In order to solve the problem of the environmental pollution of iron tail and the wasting of resources, taking suitable means to excite the gelation activity of iron tailings, then having much research newly to occur used as cement mixture and concrete admixture.Be summed up, the raising means of iron tailings gelation activity mainly contain any two kinds of compounds in mechanical grinding, chemi-excitation, thermal activation or three kinds of exciting means.Such as, patent of invention CN103011648A " a kind of the reinforcement of concrete Modified Iron mine tailing active admixture and preparation method thereof " discloses a kind of polycarboxylate dehydragent that utilizes and carries out to iron tailings the method that surface modification improves its activity, the activity of the Modified Iron mine tailing active admixture adopting the method to produce is with suitable with II grade of flyash, but polycarboxylate dehydragent only plays dispersion grind-aiding effect wherein, only contribute to the raising of iron tailings fineness, the chemically reactive of iron tailings can not be excited.Patent of invention CN102850011A " a kind of processing method utilizing iron tailings to prepare RPC " discloses one and utilizes mechanical force to activate SiO 2the iron tailings of content 69%, make it as the reactive powder component of RPC, simultaneously using the method for the iron tailings of 0.16mm ~ 1.25mm as fine aggregate preparation RPC, but there are some researches show that mechanical grinding can not improve the chemically reactive of iron tailings, iron tailings is main based on physics filling effect at normal temperatures; Therefore, seek another kind more extensive, more effective iron tailings active modification method and seem particularly important.Through retrieval, having no at present with iron tailings is that main raw material prepares the pertinent literature of alkali-activated carbonatite gelling material openly.
Summary of the invention
The invention provides one with siliceous iron tailings for main raw material prepares alkali-activated carbonatite gelling material and preparation method thereof, expand the comprehensive utilization face of iron tailings, solve iron tailings and store up caused environmental pollution and problem of resource waste, simultaneously, also expanded the raw material range of alkali-activated carbonatite gelling material, solve at present with slag, metakaolin and flyash for main prepare alkali-activated carbonatite gelling material time raw material sources limited, problem that cost is higher.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of alkali-activated carbonatite gelling material, include the composite granule be made up of siliceous iron tailings powder, flyash and slag powders, the liquid glass accounting for composite granule weight 5% ~ 15%, account for the water of composite granule weight 15% ~ 30%, described composite granule each constituent mass percentage composition is: siliceous iron tailings powder 50% ~ 75%, flyash 0 ~ 45%, slag powders 5% ~ 50%.
By such scheme, described composite granule each constituent mass percentage composition is: siliceous iron tailings powder 50 ~ 75%, flyash 15 ~ 25%, slag powders 35 ~ 50%.
By such scheme, described composite granule each constituent mass percentage composition is: siliceous iron tailings powder 50%, flyash 15%, slag powders 35%.
By such scheme, described siliceous iron tailings powder is that siliceous iron tailings raw ore is milled to specific surface area 300m 2/ kg ~ 600m 2/ kg.
By such scheme, described siliceous iron tailings powder is that siliceous iron tailings raw ore is milled to specific surface area 300m 2/ kg ~ 400m 2/ kg.
By such scheme, described liquid glass modulus n is 1.0 ~ 2.0.
The preparation method of described alkali-activated carbonatite gelling material, includes following steps:
1) siliceous iron tailings powder, flyash and slag powders are mixed according to proportioning, obtain iron tailings powder-flyash-slag powders composite granule, described composite granule each constituent mass percentage composition is: siliceous iron tailings powder 50% ~ 75%, flyash 0 ~ 45%, slag powders 5% ~ 50%;
2) by liquid glass and water mixing, obtained alkali activating agent solution; Wherein the quality of liquid glass accounts for 5% ~ 15% of composite granule weight, and water accounts for composite granule weight 15% ~ 30%;
3) alkali activating agent solution is joined in composite granule, stir and obtain alkali-activated carbonatite gelling material slurry;
4) by alkali-activated carbonatite gelling material slurry inject mould vibratory compaction and under normal temperature condition maintenance to the demoulding, obtain alkali-activated carbonatite gelling material and only starch test specimen;
5) alkali-activated carbonatite gelling material being starched test specimen only carries out steam-cured.
By such scheme, described steam curing temperature is 40 ~ 80 DEG C, and the steam-cured time is 0 ~ 15h.
Siliceous iron tailings base alkali-activated carbonatite gelling material provided by the invention take iron tailings as main raw material, add the content ratio of the element such as silicon, aluminium, calcium in flyash and slag powders regulation system, with the liquid glass of suitable modulus for alkali-activator, be prepared from through the operation such as shaping, steam-cured.Reaction mechanism is, the composite powder material of iron tailings, flyash and slag powders composition, under the effect of water glass alkali-activator, depolymerization occurs, regroup into new gelinite in water medium.
Beneficial effect of the present invention is: with the siliceous iron tailings of inertia widely of originating for main raw material, not only expand iron tailings comprehensive utilization of resources approach, solve the problem of the resource waste and pollution environment that iron tailings is stored up for a long time, and extend the raw material sources of alkali-activated carbonatite gelling material production.Compared with the gelling material production processes such as traditional silicate cement, alkali-activated carbonatite gelling material preparation process provided by the invention, without the need to high-temperature calcination, has saved production cost greatly, decreases the high resource of manufacture of cement, high energy gamma source consumption and high CO 2discharge is a kind of novel low carbon gelling material.In addition, alkali-activated carbonatite gelling material hardened paste provided by the invention possesses excellent mechanical property, the 3d ultimate compression strength > 60MPa of optimal proportion, 28d ultimate compression strength > 80MPa.Therefore, alkali-activated carbonatite gelling material provided by the invention and preparation method thereof has wide market application foreground.
Embodiment
Alkali-activated carbonatite gelling material provided by the invention is obtained under the exciting of water glass by the composite granule of siliceous iron tailings powder, flyash and slag powders.Its composition of raw materials comprises the component of following mass percentage: 50% ~ 75% siliceous iron tailings powder, 5% ~ 50% slag powders, 0 ~ 45% flyash (iron tailings powder, flyash, slag powders percentage composition sum are 100%, formed composite granule), account for the liquid glass of composite granule weight 5% ~ 15%, account for the water of composite granule weight 15% ~ 30%.Wherein:
The siliceous iron tailings powder of one of composite powder raw material siliceous iron tailings raw ore is milled in ball mill to meet specific surface area be 300m 2/ kg ~ 600m 2the powder gained of/kg.The specific surface area of preferred iron tailings powder is 300m 2/ kg ~ 400m 2/ kg.Iron tailings powder proportion in composite granule is 50% ~ 75%, is preferably 50%.
The flyash of one of composite powder raw material is F class II grade of flyash, and specific surface area is 427m 2/ kg, flyash proportion in composite granule is 0 ~ 45%, is preferably 15%.The object of adding flyash in powder is the ratio in order to element silicon in regulation system and aluminium element, makes system extent of polymerization after alkali-activated carbonatite higher, thus has better mechanical property.
The slag powders of one of composite powder raw material is S75 level ground slag powder, and specific surface area is 405m 2/ kg, slag powders proportion in composite powder is 5% ~ 50%, is preferably 35%.In powder, add slag powders can significantly improve the early mechanics characteristics that alkali-activated carbonatite gelling material starches test specimen only.
Alkali-activator one of in gelling material raw material is the water glass (Na of modulus 1.0 ~ 2.0 2onSiO 2), its volume is 5% ~ 15% of composite powder weight, and (volume is with Na in water glass solution to be preferably 10% 2onSiO 2quality meter).Liquid glass (the Na of different modulus n 2onSiO 2) be regulate in undisturbed industry water glass chemical pure NaOH being added modulus n=3.3 to obtain.
In addition, prepare that alkali-activated carbonatite gelling material starches that required water-content is composite granule quality only 15% ~ 30%, be preferably 20%.
The chemical constitution unit of the powder body material of alkali-activated carbonatite gelling material prepared by table 1: wt%
The present invention also provides the method preparing alkali-activated carbonatite gelling material and clean slurry test specimen thereof by aforementioned each proportioning raw materials further, specifically can comprise the following steps:
1), after iron tailings raw ore is dried, in ball mill, the requirement meeting iron tailings powder specific surface area is milled to;
2) by iron tailings powder, flyash and slag powders according to proportioning Homogeneous phase mixing, obtain iron tailings powder-flyash-breeze composite powder;
3) liquid glass and water that meet volume requirement and gouache ratio requirement are added in iron tailings powder-flyash-breeze composite powder, stir and obtain alkali-activated carbonatite gelling material slurry;
4) by alkali-activated carbonatite gelling material slurry inject mould vibratory compaction and under normal temperature condition maintenance to the demoulding, obtain alkali-activated carbonatite gelling material and only starch test specimen;
5) alkali-activated carbonatite gelling material being starched test specimen only carries out steam-cured, natural curing at 20 ± 2 DEG C again after steam-cured end.
Embodiment premised on technical solution of the present invention under implement, give detailed embodiment and concrete operating process, embodiment contributes to understanding the present invention, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1: composite powder different ratio is on the impact of alkali-activated carbonatite gelling material performance taking iron tailings as main raw material.
First by modulus n be 3.3 industrial waterglass (water content 64%) and chemical pure NaOH mix by weight 1:0.1, under normal temperature, stirring system makes modulus of water glass n be adjusted to 1.5, detect composite powder different ratio starches test specimen mechanical property only impact on alkali-activated carbonatite gelling material, the preparation method of alkali-activated carbonatite gelling material of the present invention comprises the following steps:
After siliceous iron tailings raw ore is dried, in ball mill, be milled to specific surface area is 350m 2/ kg.
The siliceous iron tailings powder, flyash and the slag powders that obtain after grinding are mixed according to different ratios, obtains iron tailings powder-flyash-slag powders composite powder material.
To account for composite powder material quality 10%, modulus is the liquid glass (Na of 1.5 2onSiO 2) and account for composite granule quality 20% water mixing, make alkali activating agent solution, alkali activating agent solution be incorporated in composite powder material, stir 3min in agitator for cement mortar after, inject 40 × 40 × 40mm 3vibrate 1min in punching block closely knit shaping, after normal temperature maintenance to the demoulding at 50 DEG C steam-cured 10h.Clean slurry test specimen after the corresponding length of time is steam-cured to gained carries out strength test.
Test result is as shown in table 2.
3d, 7d, 28d intensity of the alkali-activated carbonatite gelling material sample of table 2 different composite powder proportioning
As can be seen from Table 2, the proportioning of composite powder material affects one of important factor of alkali-activated carbonatite gelling material mechanical property.When in composite powder material, iron tailings powder content accounts for 50%, fly ash content 15%, during slag powders content 35%, 3d, 7d and 28d ultimate compression strength that alkali-activated carbonatite gelling material starches test specimen only can reach 64.5MPa, 80.0MPa and 82.3MPa respectively.
As can be seen from Table 2, in iron tailings powder, add flyash because sial element ratio in composite powder material can be regulated, thus improve the extent of polymerization of gelling material slurry, strengthen its mechanical property; In composite powder material, add slag powders, can significantly improve the early strength of alkali-activated carbonatite gelling material, when slag powders content is increased to 35%, the 7d ultimate compression strength of test specimen can reach more than 80Ma.
Embodiment 2: the modulus of water glass and content are on the impact of alkali-activated carbonatite gelling material performance taking iron tailings as main raw material.
First chemical pure NaOH is added the modulus (modulation ratio is in table 3) regulating water glass in undisturbed industry water glass (modulus n=3.3), the modulus of detection water glass and content are on the impact of alkali-activated carbonatite gelling material being starched only to test specimen mechanical property, and the preparation method of alkali-activated carbonatite gelling material of the present invention comprises the following steps:
After siliceous iron tailings raw ore is dried, in ball mill, be milled to specific surface area is 350m 2/ kg.
By mass percent be the siliceous iron tailings powder of 50%, the slag powders of 35% and 15% flyash mixing, obtain iron tailings powder-flyash-slag powders composite powder material.
Different modulus and the water glass of content are mixed and made into alkali activating agent solution with the water of account for composite granule quality 20%, alkali activating agent solution are incorporated in composite powder material, stir 3min in agitator for cement mortar after, inject 40 × 40 × 40mm 3punching block in vibrate 1min closely knit shaping, after normal temperature maintenance to the demoulding at 50 DEG C steam-cured 10h, obtained alkali-activated carbonatite gelling material starches test specimen only.In the corresponding length of time, strength test is carried out to clean slurry test specimen.
Test result is as shown in table 3.
3d, 7d, 28d intensity of the alkali-activated carbonatite gelling material sample of the different modulus of water glass of table 3 and content
As can be seen from Table 3, the modulus of water glass affects the important factor that alkali-activated carbonatite gelling material starches test specimen mechanical property only.Alkali-activated carbonatite gelling material intensity difference prepared by the water glass of modulus between 1.0 ~ 2.0 is little, show the intensity of the alkali-activated carbonatite gelling material prepared apparently higher than the water glass of modulus more than 2.0, wherein when modulus of water glass is at n=1.5,3d, 7d and 28d ultimate compression strength that gelling material starches test specimen only can reach 64.5,80.0 and 82.3MPa, and each age strength is the highest.
As can be seen from Table 3, the mechanical property of the content of water glass in alkali-activated carbonatite gelling material also this test specimen of remarkably influenced.Increasing alkali-activator---the content of water glass can improve the extent of polymerization of degree that composite powder is excited and slurry, thus promote the mechanical property of test specimen, but when alkali-activator too high levels, test specimen there will be accumulation of salt in the surface soil phenomenon, along with the length of time increases, the accumulation of salt in the surface soil can destroy the structure of test specimen, and test specimen is ftractureed, later strength generation retraction.
Embodiment 3: water-content is on the impact of alkali-activated carbonatite gelling material performance taking iron tailings as main raw material.
By modulus n be 3.3 industrial waterglass (water content 64%) and chemical pure NaOH mix by weight 1:0.1, stirring under normal temperature makes modulus of water glass n be adjusted to 1.5, detect different gouache ratio starches test specimen mechanical property only impact on alkali-activated carbonatite gelling material, the preparation method of alkali-activated carbonatite gelling material of the present invention comprises the following steps:
After siliceous iron tailings raw ore is dried, in ball mill, be milled to specific surface area is 350m 2/ kg.
By mass percent be the siliceous iron tailings powder of 50%, the slag powders of 35% and 15% flyash mixing, obtain composite powder.
To account for powder body material quality 10%, modulus is the water glass (Na of 1.5 2onSiO 2) and the water of different content be mixed and made into alkali activating agent solution, alkali activating agent solution is incorporated in composite powder material, stir 3min in agitator for cement mortar after, inject 40 × 40 × 40mm 3punching block in vibrate 1min closely knit shaping, after normal temperature maintenance to the demoulding at 50 DEG C steam-cured 10h, obtained alkali-activated carbonatite gelling material starches test specimen only.In the corresponding length of time, strength test is carried out to clean slurry test specimen.
Test result is as shown in table 4.
3d, 7d, 28d intensity of the alkali-activated carbonatite gelling material sample of the different gouache ratio of table 4
As can be seen from Table 4, prepare alkali-activated carbonatite gelling material when only starching test specimen, water volume affects one of test specimen mechanical property factor always.When water-content is 20%, test specimen has best mechanical property.This is because composite powder is using water as medium, and the key under the effect of alkali in structure is interrupted depolymerization, then regroup into new polymkeric substance along with scattering and disappearing of moisture.Water-content increase can increase the porosity in the middle of test specimen, makes its mechanical properties decrease.In addition, if water-content is too low, the depolymehzation process of composite powder cannot fully complete on the one hand, reduce the extent of polymerization of slurry, on the other hand, the too low meeting of water-content greatly increases slurry denseness and is unfavorable for shaping, make paste structure uneven and closely knit, reduce its mechanical property.
Embodiment 4: iron tailings fineness is on the impact of alkali-activated carbonatite gelling material performance taking iron tailings as main raw material.
By modulus n be 3.3 industrial waterglass (water content 64%) and chemical pure NaOH mix by weight 1:0.1, under normal temperature, stirring system makes modulus of water glass n be adjusted to 1.5, detect different iron tailings fineness starches test specimen mechanical property only impact on alkali-activated carbonatite gelling material, the preparation method of alkali-activated carbonatite gelling material of the present invention comprises the following steps:
After siliceous iron tailings raw ore is dried, in ball mill ball milling different time with obtained specific surface area for 300 ~ 600m 2the iron tailings powder of/kg.
By mass percent be the siliceous iron tailings powder of 50%, the slag powders of 35% and 15% flyash mixing, obtain composite powder.
To account for composite powder material quality 10%, modulus is the liquid glass (Na of 1.5 2onSiO 2) and account for the mixing of composite granule quality 20% water, make alkali activating agent solution, alkali activating agent solution is incorporated in composite powder material, stir 3min in agitator for cement mortar after, inject 40 × 40 × 40mm 3punching block in vibrate 1min closely knit shaping, after normal temperature maintenance to the demoulding at 50 DEG C steam-cured 10h, obtained alkali-activated carbonatite gelling material starches test specimen only.In the corresponding length of time, strength test is carried out to clean slurry test specimen.
Test result is as shown in table 5.
3d, 7d, 28d intensity of the alkali-activated carbonatite gelling material sample of table 5 different fineness iron tailings powder
As can be seen from Table 5, the mechanical property of the specific surface area of iron tailings comparatively remarkably influenced alkali-activated carbonatite gelling material.When the specific surface area of iron tailings powder is lower (lower than 300m 2/ kg), the iron tailings powder lateral reactivity degree that is stimulated is lower, and corresponding ultimate compression strength is lower.Along with iron tailings powder specific surface area increases, the iron tailings powder activity degree that is stimulated improves, and mechanical property promotes.But, when iron tailings powder specific surface area is increased to 350m 2after/more than kg, under the condition of identical watering quantity, the workability of slurry decreases, and the slurry viscosity after stirring increases, mobility is deteriorated, and shaping difficulty increases, and cause defect in test specimen more, mechanical property is impaired to some extent on the contrary.
As can be seen from Table 5, when iron tailings powder specific surface area is 350m 2during/kg, 3d, 7d, 28d intensity of clean slurry test specimen reaches the highest, is respectively 64.5MPa, 80.0MPa and 82.3MPa.When specific surface area continues to increase, ultimate compression strength can not continue to increase thereupon, moreover fineness increase can increase production cost, so from economy and technical angle, the specific surface area of iron tailings powder is at 300 ~ 400m 2the performance of/kg scope to alkali-activated carbonatite gelling material performance of the present invention is better.
Embodiment 5: steam curing temperature and time are on the impact of alkali-activated carbonatite gelling material performance taking iron tailings as main raw material.
By modulus n be 3.3 industrial waterglass (water content 64%) and chemical pure NaOH mix by weight 1:0.1, under normal temperature, stirring system makes modulus of water glass n be adjusted to 1.5, detection curing temperature and time starch the impact of test specimen mechanical property only on alkali-activated carbonatite gelling material, and the preparation method of alkali-activated carbonatite gelling material of the present invention comprises the following steps:
After siliceous iron tailings raw ore is dried, in ball mill, be milled to specific surface area is 350m 2/ kg.
By mass percent be the siliceous iron tailings powder of 50%, the slag powders of 35% and 15% flyash mixing, obtain iron tailings powder-flyash-slag powders composite granule.
To account for composite powder material quality 10%, modulus is the liquid glass (Na of 1.5 2onSiO 2) and account for the mixing of composite granule quality 20% water, make alkali activating agent solution, alkali activating agent solution is incorporated in composite powder material, stir 3min in agitator for cement mortar after, inject 40 × 40 × 40mm 3punching block in vibrate 1min closely knit shaping, steam-cured different time at different temperatures after normal temperature maintenance to the demoulding, obtained alkali-activated carbonatite gelling material starches test specimen only.In the corresponding length of time, strength test is carried out to clean slurry test specimen.
Test result is as shown in table 6.
3d, 7d, 28d intensity of the alkali-activated carbonatite gelling material sample of the different steam curing temperature of table 6 and time
As can be seen from Table 6, different steam curing temperature and the early mechanics characteristics of time on alkali-activated carbonatite gelling material have remarkably influenced.When test specimen is at 50 DEG C during steam-cured 10h, 3d, 7d, 28d intensity of clean slurry test specimen can reach the highest, is respectively 64.5MPa, 80.0MPa and 82.3MPa.Continue raising steam curing temperature or extend the steam-cured time not remarkable to the raising of test specimen early mechanics characteristics.
As can be seen from above each embodiment, the alkali-activated carbonatite gelling material that is base material with siliceous iron tailings provided by the invention, the iron tailings powder of volume more than 50% can be used, not only reduce iron tailings and store up pollution to environment, also solve iron tailings and store up the problem taking a large amount of land resources.In addition, the method preparing alkali-activated carbonatite gelling material provided by the invention is without the need to calcining, and reducing the production cost of gelling material, is the particular embodiment of recycling economy and science green technology.

Claims (8)

1. an alkali-activated carbonatite gelling material, include the composite granule be made up of siliceous iron tailings powder, flyash and slag powders, the liquid glass accounting for composite granule weight 5% ~ 15%, account for the water of composite granule weight 15% ~ 30%, described composite granule each constituent mass percentage composition is: siliceous iron tailings powder 50% ~ 75%, flyash 0 ~ 45%, slag powders 5% ~ 50%.
2. alkali-activated carbonatite gelling material according to claim 1, is characterized in that: described composite granule each constituent mass percentage composition is: siliceous iron tailings powder 50 ~ 75%, flyash 15 ~ 25%, slag powders 35 ~ 50%.
3. alkali-activated carbonatite gelling material according to claim 2, is characterized in that: described composite granule each constituent mass percentage composition is: siliceous iron tailings powder 50%, flyash 15%, slag powders 35%.
4. alkali-activated carbonatite gelling material according to claim 1, is characterized in that: described siliceous iron tailings powder is that siliceous iron tailings raw ore is milled to specific surface area 300m 2/ kg ~ 600m 2/ kg.
5. alkali-activated carbonatite gelling material according to claim 4, is characterized in that: described siliceous iron tailings powder is that siliceous iron tailings raw ore is milled to specific surface area 300m 2/ kg ~ 400m 2/ kg.
6. alkali-activated carbonatite gelling material according to claim 1, is characterized in that: described liquid glass modulus n is 1.0 ~ 2.0.
7. the preparation method of alkali-activated carbonatite gelling material according to claim 1, includes following steps:
1) siliceous iron tailings powder, flyash and slag powders are mixed according to proportioning, obtain iron tailings powder-flyash-slag powders composite granule, described composite granule each constituent mass percentage composition is: siliceous iron tailings powder 50% ~ 75%, flyash 0 ~ 45%, slag powders 5% ~ 50%;
2) by liquid glass and water mixing, obtained alkali activating agent solution; Wherein the quality of liquid glass accounts for 5% ~ 15% of composite granule weight, and water accounts for composite granule weight 15% ~ 30%;
3) alkali activating agent solution is joined in composite granule, stir and obtain alkali-activated carbonatite gelling material slurry;
4) by alkali-activated carbonatite gelling material slurry inject mould vibratory compaction and under normal temperature condition maintenance to the demoulding, obtain alkali-activated carbonatite gelling material and only starch test specimen;
5) alkali-activated carbonatite gelling material being starched test specimen only carries out steam-cured.
8. the preparation method of alkali-activated carbonatite gelling material according to claim 7, it is characterized in that described steam curing temperature is 40 ~ 80 DEG C, the steam-cured time is 0 ~ 15h.
CN201410618006.5A 2014-11-05 2014-11-05 A kind of alkali-activated carbonatite Binder Materials and preparation method thereof CN104446045B (en)

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CN106431025A (en) * 2016-08-31 2017-02-22 中国建筑材料科学研究总院 Alkali-activated cementing material and preparation method thereof
CN106830726A (en) * 2017-01-19 2017-06-13 深圳大学 A kind of impressed current anode composite and preparation method thereof
CN107298537A (en) * 2017-06-12 2017-10-27 哈尔滨工业大学 A kind of multiplicity reactivation iron tailings sand supplementary cementitious material and preparation method thereof
CN108249859A (en) * 2018-02-02 2018-07-06 天津城建大学 A kind of alkali-activated carbonatite cementitious material pervious concrete and preparation method thereof
CN108275899A (en) * 2018-03-09 2018-07-13 济南大学 A kind of alkali-excited cement and preparation method thereof
CN109053045A (en) * 2018-08-30 2018-12-21 广州大学 A kind of alkali-activated carbonatite fly-ash slag piezoelectricity floor tile and preparation method thereof
CN109534704A (en) * 2018-12-07 2019-03-29 临沂宏艺科技发展有限公司 A kind of Making Use of Tailings preparing cement using golden tailing utilizes method
CN109574558A (en) * 2018-11-20 2019-04-05 东北大学秦皇岛分校 One kind is based on iron tailings geo-polymer porous material and preparation method thereof
CN109734339A (en) * 2019-03-19 2019-05-10 安徽理工大学 A kind of geo-polymer and preparation method thereof of organic alkali-activated carbonatite
CN109836170A (en) * 2018-12-28 2019-06-04 西安建筑科技大学 A method of improving alkali-activated carbonatite fly ash gel material early mechanics characteristics using electric curing
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CN105776915B (en) * 2016-03-23 2018-04-13 华南理工大学 A kind of non-cement-based quick setting early strength concrete and preparation method and application
CN106242349A (en) * 2016-08-05 2016-12-21 武汉理工大学 A kind of granite stone powder complex mineral blending material and preparation method thereof
CN106431025A (en) * 2016-08-31 2017-02-22 中国建筑材料科学研究总院 Alkali-activated cementing material and preparation method thereof
CN106830726A (en) * 2017-01-19 2017-06-13 深圳大学 A kind of impressed current anode composite and preparation method thereof
CN107298537A (en) * 2017-06-12 2017-10-27 哈尔滨工业大学 A kind of multiplicity reactivation iron tailings sand supplementary cementitious material and preparation method thereof
CN108249859A (en) * 2018-02-02 2018-07-06 天津城建大学 A kind of alkali-activated carbonatite cementitious material pervious concrete and preparation method thereof
CN108275899A (en) * 2018-03-09 2018-07-13 济南大学 A kind of alkali-excited cement and preparation method thereof
CN108275899B (en) * 2018-03-09 2020-12-01 济南大学 Alkali-activated cement and preparation method thereof
CN109053045A (en) * 2018-08-30 2018-12-21 广州大学 A kind of alkali-activated carbonatite fly-ash slag piezoelectricity floor tile and preparation method thereof
CN109574558A (en) * 2018-11-20 2019-04-05 东北大学秦皇岛分校 One kind is based on iron tailings geo-polymer porous material and preparation method thereof
CN109534704A (en) * 2018-12-07 2019-03-29 临沂宏艺科技发展有限公司 A kind of Making Use of Tailings preparing cement using golden tailing utilizes method
CN109836170A (en) * 2018-12-28 2019-06-04 西安建筑科技大学 A method of improving alkali-activated carbonatite fly ash gel material early mechanics characteristics using electric curing
CN109734339A (en) * 2019-03-19 2019-05-10 安徽理工大学 A kind of geo-polymer and preparation method thereof of organic alkali-activated carbonatite
CN110510893A (en) * 2019-08-19 2019-11-29 昆明理工大学 A kind of anti-oxidation barrier material and the preparation method and application thereof

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