CN109824287A - A kind of method of alkali-activated carbonatite lead and zinc smelting dreg from cementation solidifying heavy metal - Google Patents
A kind of method of alkali-activated carbonatite lead and zinc smelting dreg from cementation solidifying heavy metal Download PDFInfo
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- CN109824287A CN109824287A CN201910300353.6A CN201910300353A CN109824287A CN 109824287 A CN109824287 A CN 109824287A CN 201910300353 A CN201910300353 A CN 201910300353A CN 109824287 A CN109824287 A CN 109824287A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- 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
Abstract
The invention discloses a kind of alkali-activated carbonatite lead and zinc smelting dregs from the method for cementation solidifying heavy metal, and the ratio of mud is adjusted after mainly mixing by the waterglass with corresponding modulus with lead and zinc smelting dreg, is then conserved to obtain lead-zinc smelting slag groundmass geopolymer.Compared with prior art, method process of the invention is simple, low in cost, it only need to be using lead and zinc smelting dreg and compound alkali-activator as raw material, the lead-zinc smelting slag groundmass geopolymer of function admirable can be obtained at normal temperature, while the heavy metal ion (zinc, chromium, copper, lead, manganese etc.) in lead and zinc smelting dreg can also be made effectively to be solidified from gelling characteristic using it.The present invention can not only greatly improve the utilization rate of lead and zinc smelting dreg, the consumption of the energy and resource is effectively reduced, reduce the environmental problem that the stockpiling of lead cadmia generates, it also can effectively prevent the leaching behavior of the heavy metal ion such as zinc, chromium, copper, lead, manganese in lead cadmia, there is good Social benefit and economic benefit.
Description
Technical field
The invention belongs to the recyclings of solid hazardous waste, harmless treatment research field, and in particular to a kind of alkali is sharp
Send out method of the lead and zinc smelting dreg from cementation solidifying heavy metal.
Background technique
China is the major producing country of lead, zinc concentrate in the world, according to statistics, ten thousand tons of lead discharges of the every production of lead smelting system
7100 tons of waste residues, every ten thousand tons of zinc of production discharge 9600 tons of waste residues, therefore the production of lead, zinc metal can generate a large amount of lead-zinc smeltings
Slag, pile up like a mountain occupies a large amount of soils for cinder field；In addition, containing the heavy metals such as Pb, Zn, Cu, Cr, Mn, these huge sum of moneys in lead cadmia
Category exists in the form of the oxide, it is considered to be a kind of solid hazardous waste.Banking up for a long time may be with rain erosion, wind
Change etc. causes a series of environmental problems.Therefore, the recycling of lead-zinc smelting waste residue and harmless treatment are that lead zinc industry future can
The only way of sustainable development.
The comprehensive utilization technique of lead and zinc smelting dreg mainly has pyrometallurgy, hydrometallurgy, microbial method, solidification/steady at present
Fixedization etc..However these methods there are technical difficulty in industrial application it is big, economic feasibility is poor the problems such as.In addition, secondary dirt
Dye is also to hinder another problem of these technical applications.For example, pyrometallurgy is gradually washed in a pan since equipment is expensive, energy consumption is high
It eliminates.Hydrometallurgy can generate the waste water of high concentration toxic heavy metal, incomplete due to filtering, and can generate solid residue discharge,
It is also difficult to implement on a large scale in industrialization.And solidification/stabilization technique combines solidification and stable advantage, can by mobility and
Toxicant is converted into that mobility is weak, toxicity is low or nontoxic substance, and is wrapped in Structured cured body.Therefore, solidify/
Stabilization technique is to handle hazardous waste most efficient method in the world at present.The processing that thes cement solidifies is a kind of common solidification processing
Method.Cement-based material is technically simple, and material source is convenient, and cost is relatively low, is worldwide widely used.So
And since cement-based material volume is big, easy graphitic corrosion, durability is insufficient, and the solidification of heavy metal ion is only one simple
Physically encapsulation, this just causes the dispute of cement solidification technology.Therefore need the more environmentally-friendly effective material of one kind to lead zinc
Metallurgical slag carries out recycling, harmless treatment.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of alkali-activated carbonatite lead and zinc smelting dregs from the side of cementation solidifying heavy metal
Method
In order to achieve the above objectives, the invention provides the following technical scheme:
A kind of alkali-activated carbonatite lead and zinc smelting dreg the described method comprises the following steps from the method for cementation solidifying heavy metal:
(1) it will be dried after 8~14h of lead and zinc smelting dreg ball milling, cross the processing of 100~300 meshes, the lead after being refined
Zinc smelting dreg；
(2) with R2O·nSiO2Based on waterglass, ROH is added by the modulus of waterglass and is adjusted to 1.0~1.8, room temperature is stood
It is aged 15~20h, obtains compound alkali-activator；
(3) compound alkali-activator and water in the lead and zinc smelting dreg after refining in step (1), step (2) are uniformly mixed,
Mixed solution is formed, mass ratio, that is, ratio of mud of water and lead and zinc smelting dreg is 0.17~0.27:1 in the mixed solution；It is described
In mixed solution in parts by mass, the lead and zinc smelting dreg after the refinement and R in the compound alkali-activator2The mass ratio of O is
100:2~6；
(4) by the mixed solution in step (3) it is die-filling after conserve 18~30h at normal temperature after demould, after demoulding again
Lead-zinc smelting slag groundmass geopolymer can be formed by continuing maintenance, to utilize the disposably real from cementation of lead and zinc smelting dreg
The purpose of existing heavy metals immobilization.
Preferably, any one or a few heavy metal in zinc, chromium, copper, lead or manganese is included in the lead and zinc smelting dreg.
Preferably, temperature dry described in step (1) is 90~110 DEG C, and the time of the drying is 10~14h.
Preferably, use the mesh number of sieve for 200 when being sieved described in step (1).
Preferably, R described in step (2)2O·nSiO2R is alkali metal, n >=1 in waterglass.
Preferably, in step (4), the maintenance carries out in standard curing box.
Preferably, it the described method comprises the following steps:
(1) it will be dried after lead and zinc smelting dreg ball milling 12h, cross the processing of 200 meshes, the lead-zinc smelting after being refined
Slag；
(2) the waterglass Na for being 34% with solid content2O·3.3SiO2Based on, sodium hydroxide is added by the mould of waterglass
Number is reduced to 1.3, and the still aging 15~20h of room temperature obtains compound alkali-activator；
(3) lead and zinc smelting dreg, compound alkali-activator and the water after the refinement in step (1) are uniformly mixed, are formed mixed
Solution is closed, mass ratio, that is, ratio of mud of water and lead and zinc smelting dreg is 0.20:1 in the mixed solution；In parts by mass, it mixes molten
Na in lead and zinc smelting dreg and the compound alkali-activator after being refined described in liquid2The mass ratio of O is 100:3.5；
(4) mixed solution in step (3) is die-filling, it conserves demould afterwards for 24 hours at normal temperature, maintenance is further continued for after demoulding i.e.
Lead-zinc smelting slag groundmass geopolymer can be formed, to disposably realize that heavy metal is solid from cementation using lead and zinc smelting dreg
The purpose of change.
The beneficial effects of the present invention are:
1, the present invention excites lead-zinc smelting using compound alkali-activator using lead and zinc smelting dreg from cementation solidifying heavy metal
Slag prepares geo-polymer, by being chemically combined in the physics sealing and amorphous state crystalline phase of amorphous products in geo-polymer
Collective effect solidify the heavy metal in lead and zinc smelting dreg；
2, method of the invention has obtained the lead zinc of function admirable only using lead and zinc smelting dreg and compound alkali-activator as raw material
Smelt slag groundmass geopolymer.The present invention can not only greatly improve the utilization rate of lead and zinc smelting dreg, and the energy and resource is effectively reduced
Consumption, reduce the environmental problem that the stockpiling of lead cadmia generates, moreover it is possible to effectively prevent the huge sum of money such as zinc, copper, lead, chromium, manganese in lead cadmia
Belong to the leaching behavior of ion, there is good Social benefit and economic benefit；
3, the present invention can reach 96.1MPa, Leaching of Heavy Metals using the test specimen uniaxial compressive strength of lead and zinc smelting dreg preparation
Toxicity meets GB5085.3-2007 " hazardous waste judging standard leaching characteristic identification " and toxicity characteristic dissolution program (TCLP) is molten
Standard out；The intensity and leaching meet the requirement of landfill yard disposition and construction.
Other advantages, target and feature of the invention will be illustrated in the following description to a certain extent, and
And to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, Huo Zheke
To be instructed from the practice of the present invention.Target of the invention and other advantages can be realized by following specification and
It obtains.
Detailed description of the invention
To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention is made below in conjunction with attached drawing excellent
The detailed description of choosing, in which:
Fig. 1 is the flow chart of alkali-activated carbonatite lead cadmia base geological polymer of the present invention preparation；
Fig. 2 is the XRD diffracting spectrum of lead and zinc smelting dreg and its geo-polymer；
Fig. 3 is the FTIR map of lead and zinc smelting dreg and its geo-polymer；
Fig. 4 is that the SEM of lead-zinc smelting slag groundmass geopolymer schemes；
Fig. 5 is microregion element the reconnaissance a and b of lead-zinc smelting slag groundmass geopolymer X-ray energy spectrum；
Fig. 6 is lead-zinc smelting slag groundmass geopolymer a, b point EDS analysis of spectra.
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.It should be noted that diagram provided in following embodiment is only to show
Meaning mode illustrates basic conception of the invention, and in the absence of conflict, the feature in following embodiment and embodiment can phase
Mutually combination.
Embodiment 1
Study Na in waterglass2The factor of three aspect of O equivalent, the modulus of waterglass and the ratio of mud is to the lead being prepared
The influence of zinc smelting dreg geo-polymer intensity, preparation step is as shown in Figure 1:
It (1) will be after the lead and zinc smelting dreg ball milling 12h containing any one or a few heavy metal in zinc, chromium, copper, lead or manganese
It carries out 105 DEG C of dry 12h, cross the processing of 200 meshes, the lead and zinc smelting dreg after being refined；
(2) with Na2O·nSiO2Waterglass based on, be added sodium hydroxide adjustment waterglass modulus, obtain compound alkali
Exciting agent；
(3) lead and zinc smelting dreg, compound alkali-activator and the water after refinement are uniformly mixed, form mixed solution, adjusted
The mass ratio (ratio of mud) and lead and zinc smelting dreg of water and lead and zinc smelting dreg and Na in waterglass in mixed solution2The mass ratio of O.
(4) by the mixed solution in step (3) it is die-filling after conserve demould afterwards for 24 hours at normal temperature, be further continued for conserving after demoulding
Lead-zinc smelting slag groundmass geopolymer can be formed, to disposably realize heavy metal from cementation using lead and zinc smelting dreg
Cured purpose.
Following parameter is adjusted respectively: modulus (1.3,1.4,1.5), lead and zinc smelting dreg and the waterglass of compound alkali-activated carbonatite mixture
Middle Na2Mass ratio (respectively 100:3.5,100:4.0,100:4.5), the ratio of mud (0.18,0.19,0.20) of O, at other
Heavy metals immobilization is carried out from cementation using alkali-activated carbonatite lead and zinc smelting dreg when part is identical, obtains different lead and zinc smelting dreg bases
Geo-polymer, by GB/T17671-1999 " Test method for strength of hydraulic cement mortar (ISO method) " respectively to different lead-zinc smeltings
Slag groundmass geopolymer carries out compressive strength determination, and corresponding uniaxial compressive strength is as shown in table 1 below.
1 Na of table2The intensity of test specimen under O equivalent, compound alkali-activator modulus, three way crossover of the ratio of mud
It is suitable to the influence primary and secondary of lead cadmia geo-polymer compression strength to can be seen that each factor from the very poor R value in table
Sequence is C > A > B, i.e. the ratio of mud > Na2O equivalent > modulus of water glass, optimum combination A1B1C3 obtain lead-zinc smelting by experiment
The optimal proportion of slag groundmass geopolymer are as follows: Na2O equivalent is 3.5%, modulus of water glass 1.3, liquid-solid ratio 0.20.
Embodiment 2
Lead cadmia geo-polymer from cementation solidifying heavy metal under optimal factor
It (1) will be after the lead and zinc smelting dreg ball milling 12h containing any one or a few heavy metal in zinc, chromium, copper, lead or manganese
It carries out 105 DEG C of dry 12h, cross the processing of 200 meshes, the lead and zinc smelting dreg after being refined；
(2) the waterglass Na for being 34% with solid content2O·3.3SiO2Based on, sodium hydroxide is added by the mould of waterglass
Number is adjusted to 1.3, obtains compound alkali-activator；
(3) in parts by mass, by the lead and zinc smelting dreg after the refinement in rapid (1) and the compound alkali-activator in step (2)
Mixing, it adds water and forms mixed solution, wherein mass ratio, that is, ratio of mud of water and lead and zinc smelting dreg is in mixed solution
R in 0.20:1, lead and zinc smelting dreg and compound alkali-activator2The mass ratio of O is 100:3.5.
(4) by the mixed solution in step (3) it is die-filling after conserve demould afterwards for 24 hours at normal temperature, be further continued for conserving after demoulding
Lead-zinc smelting slag groundmass geopolymer can be formed within 28 days, to disposably realize weight from cementation using lead and zinc smelting dreg
Metal-cured purpose.
Compression strength is carried out to test specimen block respectively by GB/T17671-1999 " Test method for strength of hydraulic cement mortar (ISO method) "
Measurement carries out Leaching measurement to lead and zinc smelting dreg and geo-polymer by TCLP method, and institute's measured data is shown in Table 2.
The compression strength Yu Leaching of Heavy Metals result of test specimen under the optimal factor of table 2
It can be found that the TCLP method leaching result that measures heavy metal is all lower from table, Leaching Heavy Metals meet poison
Property characteristic dissolution program (TCLP) dissolution standard limit value；Meanwhile it is strong with test specimen uniaxial compressive prepared by method of the invention
Degree can reach 96.1MPa, meet the requirement of landfill yard disposition and construction.
Embodiment 3
It (1) will be after the lead and zinc smelting dreg ball milling 8h containing any one or a few heavy metal in zinc, chromium, copper, lead or manganese
It carries out 95 DEG C of dry 14h, sieve with 100 mesh sieve processing, the lead and zinc smelting dreg after being refined；
(2) with K2O·nSiO2Based on waterglass, KOH is added by the modulus of waterglass and is adjusted to 1.0, is aged 15h, obtains
Compound alkali-activator；
(3) lead and zinc smelting dreg, compound alkali-activator and the water after the refinement in step (1) are uniformly mixed, are formed mixed
Solution is closed, wherein the mass ratio (ratio of mud) of water and lead and zinc smelting dreg is 0.17:1 in mixed solution；In parts by mass, after refinement
Lead and zinc smelting dreg and the compound alkali-activator in K2The mass ratio of O is 100:2.
(4) by the mixed solution in step (3) it is die-filling after conserve 18h at normal temperature after demould, be further continued for after demoulding
Maintenance can form lead-zinc smelting slag groundmass geopolymer, to disposably realize weight from cementation using lead and zinc smelting dreg
Metal-cured purpose.
Embodiment 4
It (1) will be after the lead and zinc smelting dreg ball milling 14h containing any one or a few heavy metal in zinc, chromium, copper, lead or manganese
It carries out 110 DEG C of dry 14h, cross the processing of 300 meshes, the lead and zinc smelting dreg after being refined；
(2) with K2O·nSiO2Based on waterglass, ROH is added by the modulus of waterglass and is adjusted to 1.1.8, is aged 25h, obtains
To compound alkali-activator；
(3) lead and zinc smelting dreg, compound alkali-activator and the water after the refinement in step (1) are uniformly mixed, are formed mixed
Solution is closed, mass ratio, that is, ratio of mud of water and lead and zinc smelting dreg is 0.27:1 in the mixed solution；In parts by mass, described thin
K in lead and zinc smelting dreg and the compound alkali-activator after change2The mass ratio of O is 100:6.
(4) by the mixed solution in step (3) it is die-filling after conserve 30h at normal temperature after demould, be further continued for after demoulding
Maintenance can form lead-zinc smelting slag groundmass geopolymer, to reach disposable reality from cementation using lead and zinc smelting dreg
The purpose of existing heavy metals immobilization.
Alkali-activated carbonatite lead cadmia base geological polymer is explored from microstructure from gelling curing heavy metal effect
Using X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR) and scanning electron microscope power spectrum (SEM-EDS) into
One step analyzes the characteristic of lead-zinc smelting slag-based geopolymer, probes into the mechanism from cementation solidifying heavy metal.Embodiment 2 is chosen in experiment
In test specimen under optimal factor carry out relevant test analysis:
(1) XRD analysis of lead and zinc smelting dreg and its geo-polymer
The XRD of lead and zinc smelting dreg is as shown in Fig. 2, lead and zinc smelting dreg (LZSS) has a large amount of amorphous phase and a small amount of point brilliant
Stone (spinel), diffraction maximum is in 25~45 ° of (2 θ maximum CuKα) at occur wide and weak peak, showing that LZSS is non-crystalline material, tool
A possibility that having higher activity, also reacting raw material of the lead cadmia as ground polymers from side.Lead cadmia base geological polymer
(LZSG) atlas analysis it is found that diffraction maximum in 25~45 ° of (2 θ maximum CuKα) at there is roomy diffraction maximum packet, show the substance
Predominantly unbodied noncrystalline structure.In addition, atlas analysis is found, hydrated calcium silicate is generated in lead cadmia base geological polymer
(C-S-H) and gahnite (gahnite), wherein C-S-H gel be in lead cadmia calcium oxide and sial composition in waterglass
The hydrated calcium silicate that the lower reaction of excitation generates；Gahnite may be due in lead cadmia spinelle under the action of alkali-activator
It is partly dissolved, zinc forms gahnite in conjunction with some substances.Further, since the formation of C-S-H gel, it is poly- to enhance geology
The consistency for closing object, to improve the performance of geo-polymer, reduce to a certain extent heavy metal ion (Cu, Cr,
Pb, Zn) leaching；In addition, the formation of gahnite, greatly reduces the leaching of zinc ion, compared with as former state, do not increase new
Contain heavy metals Mineral crystal phase, show heavy metal ion with certain amorphous state by sealing in lead cadmia geo-polymer
In.These results also match with leaching result and compression strength result；
(2) FTIR of lead and zinc smelting dreg and geo-polymer is analyzed
Fig. 3 is the FTIR spectrum of lead cadmia and lead and zinc smelting dreg from gel.According to map, 3330cm-1Strong absworption peak
It is the stretching vibration peak due to hydroxyl, 1654cm-1Absorption peak be hydrone bending vibration, this show in gel exist trip
From water and combine water.1420cm in spectrogram-1The stretching vibration of O-C-O, is sample in maintenance processes in corresponding carbonate
The carbonization phenomenon for being influenced and being formed by Carbon Dioxide in Air.Lead cadmia and lead and zinc smelting dreg are compared from gel spectrogram,
670cm-1The absorption peak that place occurs corresponds to Si-O-Al bending vibration in lead cadmia vitreous structure, and wherein Al may match with six
Position form exists, and there are a certain amount of [AlO6] octahedra, after gelling precursor reactant certainly, 670cm-1Flexural vibrations peak becomes unknown
It is aobvious, in 663cm-1There is Al-O-Si symmetrical stretching vibration peak in place, this shows part [AlO in lead and zinc smelting dreg to a certain extent6]
Octahedron is destroyed by depolymerization, polycondensation reaction, forms [AlO4] tetrahedron.Wave number 419cm-1The absorption peak of left and right is tetrahedron
The bending vibration of Si-O-Si and O-Si-O in silicate.870cm-1For lead and zinc smelting dreg Si-O or Al-O stretching vibration peak,
943cm-1Strong absworption peak correspond to Si-O-Si (Al) asymmetric stretching vibration, from gel forming process, Si-O key and
The alternating polycondensation of Al-O key and the dissymmetrical structure that is formed, therefore the asymmetric stretching vibration spectrum of Si-O-Si (Al) is relative to raw material
There is larger offset.Offset may also substitute Na for heavy metal ion in lead cadmia+、Ca2+Etc. causing structure asymmetry to cause.
These results indicate that heavy metal ion may have part chemical bonding in geopolymer structure；
(3) the SEM-EDS analysis of lead-zinc smelting slag groundmass geopolymer
The scanning electron microscope of lead-zinc smelting slag groundmass geopolymer is as shown in figure 4, can according to the image under different amplification
To see, surface texture is fine and close, have it is certain may be the Si-O-Al-O that Si-O and Al-O is alternately bonded together to form structure,
The alternating bonding of this structure is conducive to improve the mechanical property of material, has confirmed the polymerization of lead cadmia base matter to a certain extent
Object has good compression strength.In addition, seeing that surface covers one layer of white gels substance in Fig. 4, this may be aquation
React the C-S-H gel or N-A-S-H gel generated.It is (a) and white at compact texture in order to further prove above-mentioned viewpoint
At color gel (b) respectively selection a little carries out EDS analysis, reconnaissance figure as shown in figure 5, A at B two o'clock EDS analysis result see Fig. 6.It is logical
Result in Fig. 6 is crossed it is found that having found the elements such as Si, Al, O at compact texture a, has further confirmed and has formed Si- in this region
The structure of O-Al-O.In white gels region (b) point, it was found that the elements such as Si, Al, O, Ca, Zn have further confirmed the region
For C-S-H gel.In addition, Zn in XRD is further confirmed in the discovery of Zn element to be also cured with certain chemical species, herein
Region does not find the presence of other heavy metal elements, shows that heavy metal may be anti-by physically encapsulation, physical absorption and chemistry
It should be cured.
In view of the foregoing it is apparent that the present invention can by the method for alkali-activated carbonatite lead and zinc smelting dreg from cementation solidifying heavy metal
The consumption of the energy and resource is effectively reduced in the utilization rate for greatly improving lead and zinc smelting dreg, reduces the environment that the stockpiling of lead cadmia generates
Problem, moreover it is possible to which the leaching behavior for effectively preventing the heavy metal ion such as zinc, chromium, copper, lead, manganese in lead cadmia has good society
Benefit and economic benefit.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of the technical program, should all be covered in the present invention
Scope of the claims in.
Claims (7)
1. a kind of alkali-activated carbonatite lead and zinc smelting dreg is from the method for cementation solidifying heavy metal, which is characterized in that the method includes following
Step:
(1) it will be dried after 8~14h of lead and zinc smelting dreg ball milling, cross the processing of 100~300 meshes, the lead zinc smelting after being refined
Refine slag；
(2) with R2O·nSiO2Based on waterglass, ROH is added by the modulus of waterglass and is adjusted to 1.0~1.8, room temperature is still aging
15~20h obtains compound alkali-activator；
(3) compound alkali-activator and water in the lead and zinc smelting dreg after refining in step (1), step (2) are uniformly mixed, are formed
Mixed solution, mass ratio, that is, ratio of mud of water and lead and zinc smelting dreg is 0.17~0.27:1 in the mixed solution；The mixing
In solution in parts by mass, the lead and zinc smelting dreg after the refinement and R in the compound alkali-activator2The mass ratio of O is 100:2
~6；
(4) by the mixed solution in step (3) it is die-filling after conserve 18~30h at normal temperature after demould, be further continued for after demoulding
Maintenance can form lead-zinc smelting slag groundmass geopolymer, to disposably realize weight from cementation using lead and zinc smelting dreg
Metal-cured purpose.
2. method of a kind of alkali-activated carbonatite lead and zinc smelting dreg from cementation solidifying heavy metal according to claim 1, which is characterized in that
Include any one or a few heavy metal in zinc, chromium, copper, lead or manganese in the lead and zinc smelting dreg.
3. method of a kind of alkali-activated carbonatite lead and zinc smelting dreg from cementation solidifying heavy metal according to claim 1, which is characterized in that
Dry temperature described in step (1) is 90~110 DEG C, and the time of the drying is 10~14h.
4. method of a kind of alkali-activated carbonatite lead and zinc smelting dreg from cementation solidifying heavy metal according to claim 1, which is characterized in that
Use the mesh number of sieve for 200 when being sieved described in step (1).
5. method of a kind of alkali-activated carbonatite lead and zinc smelting dreg from cementation solidifying heavy metal according to claim 1, which is characterized in that
R described in step (2)2O·nSiO2R is alkali metal, n >=1 in waterglass.
6. method of a kind of alkali-activated carbonatite lead and zinc smelting dreg from cementation solidifying heavy metal according to claim 1, which is characterized in that
In step (4), the maintenance carries out in standard curing box.
7. a kind of alkali-activated carbonatite lead and zinc smelting dreg is from the method for cementation solidifying heavy metal any one of according to claim 1~6,
It is characterized in that, the described method comprises the following steps:
(1) it will be dried after lead and zinc smelting dreg ball milling 12h, cross the processing of 200 meshes, the lead and zinc smelting dreg after being refined；
(2) the waterglass Na for being 34% with solid content2O·3.3SiO2Based on, sodium hydroxide is added and drops the modulus of waterglass
It is 1.3, the still aging 15~20h of room temperature obtains compound alkali-activator；
(3) lead and zinc smelting dreg, compound alkali-activator and the water after the refinement in step (1) are uniformly mixed, it is molten forms mixing
Liquid, mass ratio, that is, ratio of mud of water and lead and zinc smelting dreg is 0.20:1 in the mixed solution；In parts by mass, in mixed solution
Na in lead and zinc smelting dreg and the compound alkali-activator after the refinement2The mass ratio of O is 100:3.5；
(4) mixed solution in step (3) is die-filling, it conserves demould afterwards for 24 hours at normal temperature, maintenance is further continued for after demoulding can shape
At lead-zinc smelting slag groundmass geopolymer, to disposably realize heavy metals immobilization from cementation using lead and zinc smelting dreg
Purpose.
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| CN114262171A (en) * | 2022-01-18 | 2022-04-01 | 云南宏佑投资有限公司 | Reinforced and toughened geopolymer and preparation method thereof |
| CN114933429A (en) * | 2022-05-13 | 2022-08-23 | 沃德费默环境资源发展(上海)有限公司 | Method for preparing alkali-activated gel material from waste incineration fly ash and metal smelting slag |
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