CN106495173A - A kind of method for producing tobermorite with siliceous discarded object and carbide slag heating using microwave - Google Patents
A kind of method for producing tobermorite with siliceous discarded object and carbide slag heating using microwave Download PDFInfo
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Abstract
The present invention provides a kind of method that siliceous discarded object and carbide slag heating using microwave produce tobermorite, comprises the following steps that：（1）Siliceous discarded object calcining and activating is obtained siliceous powder；（2）The siliceous powder, carbide slag and sodium hydroxide solution are well mixed, heating using microwave synthetic reaction is carried out；（3）After the completion of question response, mixed slurry is filtrated to get filter cake and attached alkali filtrate；（4）By the Washing of Filter Cake, tobermorite is dried to obtain, by Washing of Filter Cake waste liquid and the attached alkali filtrate recovery into the sodium hydroxide solution.The reaction temperature of the more existing synthetic method of the present invention is low, the time is short, process is simple, mild condition, the tobermorite purity of acquisition is high, the mutually single free from admixture of thing, degree of crystallinity is high, and be greatly lowered and production cost and economize on resources, while a kind of new solution route is provided to gangue, sour solution-off aluminium powder coal ash and carbide slag these three large solid waste discharge problems also.
Description
Technical field
The present invention relates to a kind of method for producing tobermorite, more particularly to a kind of with siliceous discarded object and carbide slag microwave
The method of heating production tobermorite.
Background technology
The discarded object of power boiler discharge that colliery or coal-burning power plant discharge is siliceous discarded object, such as flyash and gangue.Acid
It is an effective way for realizing flyash high value added utilization that method extracts aluminum oxide in flyash, the species bag of presently used acid
Include hydrochloric acid, sulfuric acid etc..Sour solution-off aluminium powder coal ash is remaining residue, its chemical composition master after aluminum oxide in acidity extraction flyash
If silica, and a small amount of aluminum oxide.If the waste residue to producing is not comprehensively utilized, new solid will be produced
Discarded object, forms secondary pollution.As for gangue, although China has formulated the fundamental state policy that Coal Gangue Resource is utilized, but existing rank
The gangue Synthetical Utilization Situation of section China allows of no optimist.Still in idle state is stacked, this not only causes pole to a large amount of gangues
The big wasting of resources, and again the ecological environment of surrounding is done great damage.So, at this stage to sour solution-off aluminium powder coal ash or
The research of utilization significance of gangue.
Flyash, aluminum oxide, silica and sodium silicate solution is directly adopted to produce grinding for tobermorite for raw material at present
Study carefully more, technology is also more ripe, but above-mentioned technology cannot be directly used to gangue or sour solution-off aluminium powder coal ash production snow silicon
Calcium stone, this is because gangue or sour solution-off aluminium powder coal ash and flyash are at aspects such as chemical composition, phase structure, physical propertys
There are many differences.First in chemical composition, flyash contains two kinds of key components of silica and aluminum oxide, for high alumina
Flyash, alumina content is up to 50%.And silica is up to 50% in gangue, about 15% aluminum oxide, carbon content are up to
20%, in sour solution-off aluminium powder coal ash, the content of aluminum oxide is greatly reduced, mainly based on silica.In thing phase, coal-powder boiler
Flyash mainly contains glass phase, mullite corundum etc., and circulating fluid bed coal ash mainly contains amorphous silicon di-oxide and oxygen
Change aluminium etc..By contrast, the crystalline phase content of gangue is more, and activity is relatively low, the crystalline phase content in sour solution-off aluminium powder coal ash
Reduce, based on glass phase, account for 85 ~ 90%, crystalline phase accounts for 10 ~ 15%, predominantly quartz and a small amount of corundum etc..At present with regard to coal
The research of spoil or sour solution-off aluminium total utilization of PCA is less, particularly with gangue or sour solution-off aluminium powder coal ash as raw material system
The correlative study of standby tobermorite is very few.
Carbide slag is the waste residue produced after calcium carbide hydrolysis obtains acetylene gas.In strong basicity, substantial amounts are transported into carbide slag
This height, and secondary pollution can be caused；If stacked on the spot, serious environmental pollution can be caused to the environment of periphery, be that China is clear
Clean production and emphasis and the difficult point of resource circulation utilization.At present the carbide slag of China is only a small amount of for preparing oxide of high activity
Calcium (CN88100820.6), desulfurization absorbent (CN99121910.4) as boiler smoke, prepares high calcium carbide and production calcium carbide
(CN03135103.4), manufacture high pressure no-baking carbide residue brick (CN200510020443.8), the raw material as clinker
(CN200510021024.6) etc., most then as solid slag, it is not fully utilized.
Tobermorite, also known as tobermorite, is a kind of hydrated calcium silicate, mainly as the main of calcium silicate insulation
One of composition.Consisting of Ca5Si6O16(OH)2·4H2O, one of H2O molecules are connected with oxygen in silicon-oxy tetrahedron for two
Two light bases, remaining 4 hydrone be intermediary water.Being used as the insulation material of building tobermorite more.Meanwhile, to lead, mercury, chromium
Also there is very strong adsorption capacity etc. heavy metal ion, have good application prospect in sewage disposal.
The method of existing production tobermorite typically generates industry using diatomite or quartz sand and alkali under melting condition
Waterglass, then adds calcareous raw material, and hydro-thermal method prepares tobermorite, in the preparation process of raw material, needs using a large amount of stones
The congruent melting in fusing kiln of the high-quality such as sand, diatomite silicon ore and soda ash or sodium sulphate, is then obtained after cooling crush dissolving；
The selection of siliceous raw material is so made to need exploitation and consume the silicon ore resources non-renewable in a large number such as quartz and diatomite；While calcium
Matter raw material is typically also needed to the independent lime calcining of the high-grade fuels such as coke or anthracite and refined lime breast, energy consumption and cost
Greatly, big to resource and ambient influnence.
Chinese patent CN104258804 discloses a kind of method of comprehensive utilization of gangue, one of step be related to
Gangue prepares tobermorite, and the method for adopting is that hydro-thermal water proof autoclave method, the method have reaction temperature height, reaction time
The problems such as length, complex process, big alkali consumption, and prepared tobermorite is mixed phase, and degree of crystallinity is poor, purity is low, no
It is suitable to prepare high-performance insulation material and adsorbent material.
Content of the invention
For the problem that existing technology is present, the present invention provides a kind of siliceous discarded object and carbide slag heating using microwave is given birth to
The method for producing tobermorite, the method are prepared using heating using microwave, the reaction time using siliceous discarded object and carbide slag as raw material
Short, degree of crystallinity is high, and draw ratio is big, and thermal conductivity factor is low, is suitable to Industry Promotion.The technical scheme is that：
A kind of method for producing tobermorite with siliceous discarded object and carbide slag heating using microwave, comprises the following steps that：
（1）Siliceous discarded object calcining and activating is obtained siliceous powder；
（2）The siliceous powder, carbide slag and sodium hydroxide solution are well mixed, heating using microwave synthetic reaction is carried out；
（3）After the completion of question response, mixed slurry is filtrated to get filter cake and attached alkali filtrate；
（4）By the Washing of Filter Cake, tobermorite is dried to obtain, by Washing of Filter Cake waste liquid and the attached alkali filtrate recovery extremely
In the sodium hydroxide solution.
In said method, the siliceous discarded object is gangue or sour solution-off aluminium powder coal ash；When siliceous discarded object is coal
Spoil, needs the proportioning for adding sodium carbonate dispensing, the sodium carbonate and gangue with Na before calcined coal gangue activation2CO3/SiO2
Mol ratio be 0.25 ~ 0.5:1 meter.
In said method, the siliceous discarded object calcining heat is 300 ~ 900 DEG C, and calcination time is 0.5 ~ 6h.
In said method, the siliceous discarded object calcining heat is preferably 400 ~ 600 DEG C, and calcination time is preferably 1 ~ 3h.
In said method, the siliceous powder, carbide slag, the proportioning of NaOH are with Si:Ca:The mol ratio of Na is 1:
(0.65~1.1):(0.6 ~ 1.6) count.
In said method, the heating using microwave synthetic reaction condition is：80 ~ 160 DEG C of temperature, time are 2 ~ 12h.
In said method, the heating using microwave synthetic reaction optimum condition is：110 ~ 150 DEG C of temperature, time are 2 ~ 6h.
In said method, the baking temperature is 80 ~ 110 DEG C, and drying time is 2 ~ 6h.
Two kinds of raw materials that said method is adopted：Gangue or the siliceous discarded object and carbide slag of sour solution-off aluminium powder coal ash,
The main thing phase constituent of gangue is containing crystalline silicon dioxide, partial oxidation aluminium, carbon and a small amount of iron oxide, sour solution-off aluminium powder coal ash
Main thing phase constituent is amorphous silicon di-oxide, part amorphous alumina, unburned carbon and a small amount of iron oxide；The master of carbide slag
It is calcium hydroxide, calcium oxide and a small amount of calcium carbonate to want thing phase constituent.Above carbide slag is without the need for pretreatment, siliceous discarded with both
After the siliceous powder that the calcining of thing one of which is obtained mixes by a certain percentage, it is only necessary to add a small amount of sodium hydroxide solution to adjust
Basicity, the tobermorite material that pure phase can be prepared by a step microwave heating method.
Beneficial effects of the present invention are：
1. the present invention is using the siliceous discarded object and carbide slag of gangue or sour solution-off aluminium powder coal ash as siliceous and calcareous raw material,
The tobermorite fiber material that high pure phase is prepared by a step microwave heating method, whole course of reaction need not add any other calcium
Source, silicon source and derivant, the reaction temperature of more existing synthetic method is low, the time is short, process is simple, mild condition, and significantly
Degree reduces production cost and economizing on resources, while also to gangue, sour solution-off aluminium powder coal ash and carbide slag these three large solid wastes
Emission problem provides a kind of new solution route.
2. the tobermorite purity that the present invention is obtained is high, and the mutually single free from admixture of thing, degree of crystallinity are high, are suitable to Industry Promotion.
3. the attached alkali filtrate and Washing of Filter Cake devil liquor recovery after the completion of heating using microwave can also be reacted by the present invention is applied to
In sodium hydroxide solution, further reduce the discharge of industrial wastes, really follow the theory of ' discarded object environmental protection treatment '.
Description of the drawings
Fig. 1 is the process chart of the siliceous discarded object for gangue of the present invention；
Fig. 2 is the process chart that the siliceous discarded object of the present invention is sour solution-off aluminium powder coal ash；
Fig. 3 is the ESEM of tobermorite prepared by the embodiment of the present invention 1（SEM）Collection of illustrative plates；
Fig. 4 is the X-ray diffraction of tobermorite prepared by the embodiment of the present invention 1（XRD）Collection of illustrative plates；
Fig. 5 is the ESEM of tobermorite prepared by the embodiment of the present invention 2（SEM）Collection of illustrative plates；
Fig. 6 is the ESEM of tobermorite prepared by the embodiment of the present invention 3（SEM）Collection of illustrative plates；
Fig. 7 is the ESEM of tobermorite prepared by the embodiment of the present invention 4（SEM）Collection of illustrative plates；
Fig. 8 is the ESEM of tobermorite prepared by the embodiment of the present invention 5（SEM）Collection of illustrative plates；
Fig. 9 is the X-ray diffraction of tobermorite prepared by the embodiment of the present invention 5（XRD）Collection of illustrative plates；
Figure 10 is the ESEM of tobermorite prepared by the embodiment of the present invention 6（SEM）Collection of illustrative plates；
Figure 11 is the ESEM of tobermorite prepared by the embodiment of the present invention 7（SEM）Collection of illustrative plates.
Specific embodiment
In describing the invention, it should be noted that the technical scheme between each embodiment can be combined with each other, but
It must can be implemented as basis with those of ordinary skill in the art to be, when the combination of technical scheme occur conflicting or cannot
Will be understood that when realizing that the combination of this technical scheme is not present, also not within the protection domain of application claims.Additionally, under
Just can phase as long as the technical characteristic involved by the different embodiments of the present invention described by face does not constitute conflict each other
Mutually combine.
The present invention is described in further details with specific embodiment below in conjunction with the accompanying drawings, described is to solution of the invention
Release rather than limit.
Embodiment 1
With gangue and carbide slag heating using microwave production tobermorite, the SiO containing 54.06% wherein in gangue2、13.64%
Al2O3, 2.67% CaO, 8.09% Fe2O3With 1.06% Na2O；CaO containing 60%, 4.34% SiO in carbide slag2、
2.24% Al2O3With a small amount of MgO and Fe2O3.Processing step is as shown in Figure 1：By gangue with sodium carbonate with Na2CO3/SiO2
Mol ratio is 0.5:1 carries out dispensing, and calcining and activating temperature is 600 DEG C, and calcination time is 1h, obtains siliceous powder；By silex
Material, carbide slag and mass concentration are 3% sodium hydroxide solution with Si:Ca:Na mol ratios are 1:0.75:1.6 dispensings, are well mixed
Heating using microwave is to 90 DEG C of insulation reactions 4h afterwards；Mixed slurry is filtrated to get filter cake and attached alkali filtrate after the completion of reaction, will be described
Washing of Filter Cake, 100 DEG C dry 3h and obtain tobermorite；Washing of Filter Cake waste liquid and attached alkali filtrate recovery are prepared to lower batch
In the sodium hydroxide solution of process.
Fig. 3 is the ESEM of tobermorite manufactured in the present embodiment（SEM）Collection of illustrative plates, it can be seen that this enforcement from collection of illustrative plates
The tobermorite of example is based on sheet and needle-like chopped fiber.Fig. 4 is the X-ray diffraction of tobermorite（XRD）Collection of illustrative plates, from collection of illustrative plates
In as can be seen that tobermorite thing manufactured in the present embodiment mutually be tobermorite pure phase.
Embodiment 2
With gangue and carbide slag heating using microwave production tobermorite, the SiO containing 56.86% wherein in gangue2、12.74%
Al2O3, 2.37% CaO, 7.68% Fe2O3With 1.36% Na2O；CaO containing 59.3% in carbide slag, 4.64%
SiO2, 2.34% Al2O3With a small amount of MgO and Fe2O3.Processing step is as shown in Figure 1：By gangue with sodium carbonate with Na2CO3/
SiO2Mol ratio is 0.4:1 carries out dispensing, and calcining and activating temperature is 700 DEG C, and calcination time is 1h, obtains siliceous powder；By silicon
Matter powder, carbide slag and mass concentration be 4% sodium hydroxide solution with Si:Ca:Na mol ratios are 1:0.8:1.4 dispensings, mixing
After uniform, heating using microwave is to 120 DEG C of insulation reactions 3h；Mixed slurry is filtrated to get filter cake and attached alkali filtrate after the completion of reaction, will
The Washing of Filter Cake, 90 DEG C dry 3h and obtain tobermorite；By Washing of Filter Cake waste liquid and attached alkali filtrate recovery to lower batch
In the sodium hydroxide solution of preparation process.
Fig. 5 is the ESEM of tobermorite manufactured in the present embodiment（SEM）Collection of illustrative plates, it can be seen that this enforcement from collection of illustrative plates
The tobermorite of example is based on sheet and needle-like chopped fiber.Tobermorite thing manufactured in the present embodiment is mutually tobermorite pure phase,
The Fig. 4 of XRD spectrum with embodiment 1, is not repeated herein upper figure.
Embodiment 3
With gangue and carbide slag heating using microwave production tobermorite, the SiO containing 52.75% wherein in gangue2、15.31%
Al2O3, 2.16% CaO, 7.29% Fe2O3With 1.91% Na2O；CaO containing 63.3% in carbide slag, 4.64%
SiO2, 2.34% Al2O3With a small amount of MgO and Fe2O3.Processing step is as shown in Figure 1：By gangue with sodium carbonate with Na2CO3/
SiO2Mol ratio is 0.45:1 carries out dispensing, and calcining and activating temperature is 650 DEG C, and calcination time is 2h, obtains siliceous powder；By silicon
Matter powder, carbide slag and mass concentration be 2% sodium hydroxide solution with Si:Ca:Na mol ratios are 1:0.85:1.5 dispensings, mixing
After uniform, heating using microwave is to 140 DEG C of insulation reactions 3h；Mixed slurry is filtrated to get filter cake and attached alkali filtrate after the completion of reaction, will
The Washing of Filter Cake, 100 DEG C dry 3h and obtain tobermorite；By Washing of Filter Cake waste liquid and attached alkali filtrate recovery to lower batch
In the sodium hydroxide solution of preparation process.
Fig. 6 is the ESEM of tobermorite manufactured in the present embodiment（SEM）Collection of illustrative plates, it can be seen that this enforcement from collection of illustrative plates
The tobermorite of example is based on sheet and needle-like chopped fiber.Tobermorite thing manufactured in the present embodiment is mutually tobermorite pure phase,
The Fig. 4 of XRD spectrum with embodiment 1, is not repeated herein upper figure.
Embodiment 4
With gangue and carbide slag heating using microwave production tobermorite, the SiO containing 51.23% wherein in gangue2、14.42%
Al2O3, 2.26% CaO, 8.27% Fe2O3With 1.54% Na2O；CaO containing 59.3% in carbide slag, 4.14%
SiO2, 2.34% Al2O3With a small amount of MgO and Fe2O3.Processing step is as shown in Figure 1：By gangue with sodium carbonate with Na2CO3/
SiO2Mol ratio is 0.5:1 carries out dispensing, and calcining and activating temperature is 700 DEG C, and calcination time is 1.5h, obtains siliceous powder；Will
Siliceous powder, carbide slag and mass concentration be 3% sodium hydroxide solution with Si:Ca:Na mol ratios are 1:0.85:1.5 dispensings, mix
Uniform rear heating using microwave is closed to 160 DEG C of insulation reactions 2h；Mixed slurry is filtrated to get filter cake and attached alkali filtrate after the completion of reaction,
The Washing of Filter Cake, 100 DEG C are dried 3h and obtains tobermorite；By Washing of Filter Cake waste liquid and attached alkali filtrate recovery to lower batch
In the sodium hydroxide solution of secondary preparation process.
Fig. 7 is the ESEM of tobermorite manufactured in the present embodiment（SEM）Collection of illustrative plates, it can be seen that this enforcement from collection of illustrative plates
The tobermorite of example is based on sheet and needle-like chopped fiber.Tobermorite thing manufactured in the present embodiment is mutually tobermorite pure phase,
The Fig. 4 of XRD spectrum with embodiment 1, is not repeated herein upper figure.
Embodiment 5
With sour solution-off aluminium powder coal ash and carbide slag heating using microwave production tobermorite, in wherein sour solution-off aluminium powder coal ash, contain 60%
SiO2, 16% Al2O3, 1.74% CaO, 26% unburned carbon and 0.57% Na2O；CaO containing 60% in carbide slag,
4.34% SiO2, 2.24% Al2O3With a small amount of MgO and Fe2O3.Processing step is as shown in Figure 2：Sour solution-off aluminium powder coal ash is forged
Activation is burnt, calcining heat is 450 DEG C, and calcination time is 2h, obtains siliceous powder；By siliceous powder, carbide slag and mass concentration
Sodium hydroxide solution for 6% is with Si:Ca:Na mol ratios are 1:0.75:1.0 dispensings, are well mixed rear heating using microwave to 110 DEG C
Insulation reaction 3h；Mixed slurry is filtrated to get filter cake and attached alkali filtrate after the completion of reaction, the Washing of Filter Cake, 100 DEG C are done
Dry 3h obtains tobermorite；Will be molten to the NaOH of lower batch preparation process to Washing of Filter Cake waste liquid and attached alkali filtrate recovery
In liquid.
Fig. 8 is the ESEM of tobermorite manufactured in the present embodiment（SEM）Collection of illustrative plates, it can be seen that this enforcement from collection of illustrative plates
The tobermorite of example is based on sheet and needle-like chopped fiber.Fig. 9 is the X-ray diffraction of tobermorite（XRD）Collection of illustrative plates, from collection of illustrative plates
In as can be seen that tobermorite thing manufactured in the present embodiment mutually be tobermorite pure phase.
Embodiment 6
With sour solution-off aluminium powder coal ash and carbide slag heating using microwave production tobermorite, contain in wherein sour solution-off aluminium powder coal ash
58.2% SiO2, 17.8% Al2O3, 1.74% CaO, 26% unburned carbon and 0.67% Na2O；Contain 59.3% in carbide slag
CaO, 4.64% SiO2, 2.34% Al2O3With a small amount of MgO and Fe2O3.Processing step is as shown in Figure 2：By sour solution-off aluminium powder
Coal ash calcining and activating, calcining heat are 450 DEG C, and calcination time is 2h, obtains siliceous powder；By siliceous powder, carbide slag and matter
Amount concentration be 7% sodium hydroxide solution with Si:Ca:Na mol ratios are 1:0.8:1.2 dispensings, are well mixed rear heating using microwave extremely
140 DEG C of insulation reactions 2h；Mixed slurry is filtrated to get filter cake and attached alkali filtrate after the completion of reaction, by the Washing of Filter Cake, 90
DEG C drying 3h obtains tobermorite；By Washing of Filter Cake waste liquid and the hydroxide of attached alkali filtrate recovery to lower batch preparation process
In sodium solution.
Figure 10 is the ESEM of tobermorite manufactured in the present embodiment（SEM）Collection of illustrative plates, it can be seen that this reality from collection of illustrative plates
The tobermorite of example is applied based on sheet and needle-like chopped fiber.Tobermorite thing manufactured in the present embodiment is mutually pure for tobermorite
Phase, the Fig. 9 of XRD spectrum with embodiment 5, is not repeated herein upper figure.
Embodiment 7
With sour solution-off aluminium powder coal ash and carbide slag heating using microwave production tobermorite, contain in wherein sour solution-off aluminium powder coal ash
62.2% SiO2, 14.8% Al2O3, 1.24% CaO, 26% unburned carbon and 0.57% Na2O；Contain 63.3% in carbide slag
CaO, 4.64% SiO2, 2.34% Al2O3With a small amount of MgO and Fe2O3.Processing step is as shown in Figure 2：By sour solution-off aluminium powder
Coal ash calcining and activating, calcining heat are 500 DEG C, and calcination time is 1h, obtains siliceous powder；By siliceous powder, carbide slag and matter
Amount concentration be 8% sodium hydroxide solution with Si:Ca:Na mol ratios are 1:0.85:1.3 dispensings, are well mixed rear heating using microwave extremely
160 DEG C of insulation reactions 4h；Mixed slurry is filtrated to get filter cake and attached alkali filtrate after the completion of reaction, by the Washing of Filter Cake, 100
DEG C drying 3h obtains tobermorite；By Washing of Filter Cake waste liquid and the hydroxide of attached alkali filtrate recovery to lower batch preparation process
In sodium solution.
Figure 11 is the ESEM of tobermorite manufactured in the present embodiment（SEM）Collection of illustrative plates, it can be seen that this reality from collection of illustrative plates
The tobermorite of example is applied based on sheet and needle-like chopped fiber.Tobermorite thing manufactured in the present embodiment is mutually pure for tobermorite
Phase, the Fig. 9 of XRD spectrum with embodiment 5, is not repeated herein upper figure.
Applicant states that the present invention illustrates the detailed process equipment of the present invention and technological process by above-described embodiment,
But above-mentioned detailed process equipment and technological process is the invention is not limited in, that is, does not mean that the present invention has to rely on above-mentioned detailed
Process equipment and technological process could be implemented.Person of ordinary skill in the field it will be clearly understood that any improvement in the present invention,
To the interpolation of the equivalence replacement of each raw material of product of the present invention and auxiliary element, selection of concrete mode etc., all fall within the present invention's
Within the scope of protection domain and disclosure.
Claims (9)
1. a kind of method for producing tobermorite with siliceous discarded object and carbide slag heating using microwave, it is characterised in that including following work
Skill step：
（1）Siliceous discarded object calcining and activating is obtained siliceous powder；
（2）The siliceous powder, carbide slag and sodium hydroxide solution are well mixed, heating using microwave synthetic reaction is carried out；
（3）After the completion of question response, mixed slurry is filtrated to get filter cake and attached alkali filtrate；
（4）By the Washing of Filter Cake, tobermorite is dried to obtain, by Washing of Filter Cake waste liquid and the attached alkali filtrate recovery extremely
In the sodium hydroxide solution.
2. a kind of method for producing tobermorite with siliceous discarded object and carbide slag heating using microwave according to claim 1,
It is characterized in that the siliceous discarded object is sour solution-off aluminium powder coal ash.
3. a kind of method for producing tobermorite with siliceous discarded object and carbide slag heating using microwave according to claim 1,
It is characterized in that the siliceous discarded object is gangue, need to add sodium carbonate dispensing before the calcined coal gangue activation, described
The proportioning of sodium carbonate and gangue is with Na2CO3/SiO2Mol ratio be 0.25 ~ 0.5:1 meter.
4. the one kind according to any one of claim 1 ~ 3 produces tobermorite with siliceous discarded object and carbide slag heating using microwave
Method, it is characterised in that the siliceous discarded object calcining heat be 300 ~ 900 DEG C, calcination time be 0.5 ~ 6h.
5. the one kind according to any one of claim 1 ~ 3 produces tobermorite with siliceous discarded object and carbide slag heating using microwave
Method, it is characterised in that the siliceous discarded object calcining heat be preferably 400 ~ 600 DEG C, calcination time be preferably 1 ~ 3h.
6. the one kind according to any one of claim 1 ~ 3 produces tobermorite with siliceous discarded object and carbide slag heating using microwave
Method, it is characterised in that the siliceous powder, carbide slag, the proportioning of NaOH are with Si:Ca:The mol ratio of Na is 1:
(0.65~1.1):(0.6 ~ 1.6) count.
7. a kind of method for producing tobermorite with siliceous discarded object and carbide slag heating using microwave according to claim 6,
It is characterized in that the heating using microwave synthetic reaction condition is：80 ~ 160 DEG C of temperature, time are 2 ~ 12h.
8. a kind of method for producing tobermorite with siliceous discarded object and carbide slag heating using microwave according to claim 6,
It is characterized in that the heating using microwave synthetic reaction optimum condition is：110 ~ 150 DEG C of temperature, time are 2 ~ 6h.
9. the one kind according to any one of claim 1 ~ 3 produces tobermorite with siliceous discarded object and carbide slag heating using microwave
Method, it is characterised in that the baking temperature be 80 ~ 110 DEG C, drying time be 2 ~ 6h.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610952487.2A CN106495173B (en) | 2016-10-27 | 2016-10-27 | A method of tobermorite is produced with siliceous waste and carbide slag microwave heating |
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| CN201610952487.2A CN106495173B (en) | 2016-10-27 | 2016-10-27 | A method of tobermorite is produced with siliceous waste and carbide slag microwave heating |
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| CN112194148A (en) * | 2020-10-16 | 2021-01-08 | 河南理工大学 | Method for removing heavy metal ions by using tobermorite synthesized by microwave hydrothermal method |
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| CN106495173B (en) | 2019-05-07 |
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