CN104858204B - A kind of resource utilization method of Fly ash bead - Google Patents
A kind of resource utilization method of Fly ash bead Download PDFInfo
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- CN104858204B CN104858204B CN201510163914.4A CN201510163914A CN104858204B CN 104858204 B CN104858204 B CN 104858204B CN 201510163914 A CN201510163914 A CN 201510163914A CN 104858204 B CN104858204 B CN 104858204B
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Abstract
The invention discloses the resource utilization method of a kind of Fly ash bead, belong to resources circulation and field of Environment Protection, it is characterised in that be classified by substep magnetic separation, Fly ash bead is divided into three kinds of magnetic beads of weak, medium, strong magnetic；Ferromagnetism magnetic bead can process magnetic kind as water and the dense media of heavy media coal separation is directly applied；Centering, weak magnetic beads carry out pre-processing and alkali process, in obtaining respectively, weak magnetic porous pottery, alkali process after aluminium salt and the mixed solution of silicon salt can be used as carrying the raw material of aluminium.The inventive method can realize the becoming more meticulous of Fly ash bead, the recycling of high added value, and technique is simple, is suitable to industrialized production, simultaneously because the inventive method consumes flyash discarded object, can produce higher ecological environment benefit.
Description
First, technical field
The present invention relates to the resource utilization method of a kind of Fly ash bead, specifically a kind of foundation is on the basis of Magnetic fractionation
Fly ash bead resource utilization method.
2nd, background technology
Flyash is a kind of industrial solid castoff.In recent years, the year of China's flyash discharges all more than 200,000,000 tons, adds up to store up
Amount is more than 3,000,000,000 tons.A large amount of flyash had both taken a large amount of arable land, caused severe contamination to soil, water resource and air；Meanwhile,
Containing substantial amounts of inorganic mineral resource in flyash, a large amount of discarding causes the huge wasting of resources.At present, China's flyash is comprehensive
Utilization rate is less than 60%, and is mainly used in concrete and building field, become more meticulous, high value added utilization rate extremely low.Become more meticulous
Total utilization of PCA is China's important topic urgently to be resolved hurrily.Contain 4-17% in flyash has iron content magnetic micro-beads, claims
For magnetic bead.Fly ash bead contains substantial amounts of iron resource, is again natural magnetic ceramics microparticle material, therefore at iron and steel simultaneously
The field such as raw materials for metallurgy, magnetic material has important application prospect.
In existing document, the patent of invention of Publication No. CN102895956A utilizes Fly ash bead and the synthesis of organic embedding medium
High magnetic response flyash micelle, can be used for efficiently processing heavy metal wastewater thereby and organic pollutant wastewater.Publication No.
The patent of invention of CN101469378A utilizes aluminous fly-ash and Fly ash bead to be prepared for AL-Si-Fe alloy, and result of study shows,
Pellet characteristics containing flyash is good, enters stove and smelts composition uniformly, contributes to the mineral hot furnace working of a furnace stable, produce AL-Si-Fe alloy performance good
Good.The patent of invention of Publication No. CN2475481Y utilizes the mixture of Fly ash bead and magnetic bead and magnetite powder as magnetic
Stabilization fluid bed separating medium, is prepared for a kind of magnetic stabilizing fluidized bed selective separation, for the sorting of efficient coal.
Although the method that above-mentioned document is mentioned is directed to the recycling of Fly ash bead, but is all as homogeneous magnetic using magnetic bead
Property granular materials use, magnetic bead is not carried out fine Magnetic fractionation and differentiation resource application.Research shows, separate sources
Fly ash bead and Fly ash bead in different component, mineral composition and magnetic contrast are all very big, above-mentioned with this understanding
In document, the application effect of magnetic bead would become hard to keep stable, and the application surface of magnetic bead is narrower, little to the consumption of flyash；
Easily cause the wasting of resources.
3rd, content of the invention
The present invention is for avoiding the weak point existing for the application of above-mentioned resource, it is desirable to provide a kind of fine graded based on magnetic
The method of Fly ash bead resource application, to be solved technical problem is that to flyash magnetic selected classification, different magnetic
The recycling treatment of magnetic bead differentiated；Magnetic bead consumption is big, resource conversion rate is high, high financial profit, be suitable to industrialized production.
The resource utilization method of Fly ash bead of the present invention, including the selected classification of magnetic bead, the pretreatment of magnetic bead and alkali are processed,
The unit processes such as classification application, Fly ash bead be eventually converted into iron ore concentrate (or magnetic kind), in magnetic porous magnetic ceramic, weak
Porous ceramics, industry carry aluminum feedstock.
The present invention realizes the recycling of Fly ash bead by the following method:
After flyash is crossed 120 mesh sieves, in high-intensity magnetic field, first carry out magnetic separation 2-4 time, it is thus achieved that all kinds of magnetic beads in flyash,
Then all kinds of magnetic beads are carried out magnetic separation 2-4 time in low-intensity magnetic field, from all kinds of magnetic beads, filter out ferromagnetism magnetic bead, finally again will be remaining
Magnetic bead in middle magnetic field, carry out magnetic separation 2-4 time, remaining magnetic bead is divided into middle magnetic beads and weak magnetic beads；Described strong magnetic
The magnetic field intensity of field is 300mT；The magnetic field intensity in described middle magnetic field is 100mT；The magnetic field intensity of described low-intensity magnetic field is 50mT.
The specific saturation magnetization ＞ 14emu/g of ferromagnetism magnetic bead；The specific saturation magnetization of 2.5emu/g≤middle magnetic beads≤
14emu/g；Specific saturation magnetization < the 2.5emu/g of weak magnetic beads.
Described weak magnetic beads is processed as follows: with water, described weak magnetic beads is carried out, to remove weak magnetic
Property magnetic bead surfaces absorption non magnetic micro mist, then will clean after weak magnetic beads and Na2CO3Mixing, forges at 720-850 DEG C
Burning 1-2 hour, cooling is placed in the aqueous slkali that concentration is 1-3mol/L, stirs 1-4 hour, obtains aluminium salt after Magneto separate
With the mixed solution of silicon salt and weak magnetic porous pottery；It after carrying out desiliconization process to the mixed solution of aluminium salt and silicon salt, is used as to carry aluminium
The raw material producing；Described weak magnetic porous pottery is used as magnetic adsorbent or bigger serface carrier；Na2CO3After quality is for cleaning
The 5%-30% of weak magnetic beads quality；
Described middle magnetic beads is processed as follows: with water, described middle magnetic beads is carried out, with magnetic in removal
Property magnetic bead surfaces absorption non magnetic micro mist, then will clean after middle magnetic beads and Na2CO3Mixing, forges at 720-850 DEG C
Burning 1-2 hour, cooling is placed in the aqueous slkali that concentration is 1-3mol/L, stirs 1-4 hour, obtains aluminium salt after Magneto separate
With the mixed solution of silicon salt and in magnetic porous pottery；It after carrying out desiliconization process to the mixed solution of aluminium salt and silicon salt, is used as to carry aluminium
The raw material producing；In described, magnetic porous pottery is used as magnetic adsorbent or bigger serface carrier；Na2CO3After quality is for cleaning
The 5%-30% of middle magnetic beads quality；
Described ferromagnetism magnetic bead is used as the dense media that water processes magnetic kind material or heavy media coal separation.
Described aqueous slkali is NaOH solution, limewash or ammoniacal liquor.
Compared with the prior art, beneficial effects of the present invention is embodied in:
1st, Fly ash bead is pressed Magnetic fractionation by the inventive method, thus different according to the mineral composition of various magnetic beads, differentiation
Carry out recycling treatment to Fly ash bead, resource conversion rate is high, technique is simple, it is easy to industrialized production.
2nd, in the inventive method, middle magnetic beads and weak magnetic beads in flyash generate magnetic porous pottery after alkali process
Grain, is not only had high-specific surface area, and can be reclaimed by Magneto separate, has important answering in fields such as water process, catalytic reactions
By prospect, therefore the invention belongs to the high added value of fly ash, become more meticulous application, can produce higher economic benefit.
3rd, the corresponding smelting iron and steel of the inventive method, industry carries the downstream industry such as aluminium, sewage disposal and has huge raw materials requirement, can
Consuming a large amount of Fly ash bead, therefore the inventive method can produce huge environmental benefit.
4th, brief description
Fig. 1 is the process chart of the resource utilization method of Fly ash bead of the present invention.
In Fig. 2, a-e is respectively typical ferromagnetism magnetic bead, middle magnetic beads, weak magnetic beads and the middle magnetic recording under room temperature
Porous ceramics, the hysteresis curve of weak magnetic porous pottery.As can be seen from the figure ferromagnetism magnetic bead, middle magnetic beads, weak magnetic
The specific saturation magnetization of magnetic bead is respectively the 26.97th, 5.94 and 1.84emu/g, due in magnetic porous pottery, weak magnetic porous
Pottery is processed the non-magnetic components such as leaching section Al, Si by middle magnetic beads, weak magnetic beads through alkali and obtains, so ratio is full
Increased with the intensity of magnetization, respectively 6.89 and 2.54emu/g.
Fig. 3 is magnetic porous pottery and weak magnetic porous ceramic adsorbent Cu in utilization2+The UV, visible light of the sewage containing copper after ion is inhaled
Receive spectrogram, before curve a, b respectively alignment processing, in magnetic porous pottery process after sewage containing copper.By with copper ion standard
The contrast of absorption curve can obtain Cu2+The concentration of ion: be mass ratio 2 ‰, low rate mixing at porous ceramic particles addition
Under conditions of absorption 2 hours, in magnetic porous pottery to Cu2+The clearance of ion is up to 86.4%.
5th, detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail.
Embodiment 1:
1st, the selected classification of magnetic bead
Weigh 1.0Kg flyash, after being crossed 120 mesh sieves, utilize dry method barrel magnetic separator to carry out under the high-intensity magnetic field of 300mT
Then all kinds of magnetic beads are carried out magnetic separation 3 times in the low-intensity magnetic field of 50mT by high intensity magnetic separation 3 times, it is thus achieved that all kinds of magnetic beads in flyash,
Ferromagnetism magnetic bead is filtered out from all kinds of magnetic beads；Finally more remaining magnetic bead is carried out in the middle magnetic field of 100mT magnetic separation 3 times,
Remaining magnetic bead is divided into middle magnetic beads and weak magnetic beads.
2nd, the process respectively of middle magnetic beads and weak magnetic beads:
Weak magnetic beads is processed as follows: with water, weak magnetic beads is carried out, to remove weak magnetic beads table
The non magnetic micro mist of face absorption, weak magnetic beads and Na after then cleaning2CO3The 10% of weak magnetic beads quality (after accounting for cleaning)
Mixing, calcines 2 hours at 800 DEG C, and cooling is placed in the NaOH solution that concentration is 1mol/L, stirring at low speed 2 hours,
Utilize permanent magnet to obtain the mixed solution of aluminium salt and silicon salt and weak magnetic porous pottery after separating, will weak magnetic porous pottery use from the beginning
It is 9 that water and deionized water are washed till pH value, is then dried 2 hours at 110 DEG C；
Centering magnetic beads is processed as follows: be carried out by water centering magnetic beads, with magnetic beads table in removal
The non magnetic micro mist of face absorption, middle magnetic beads and Na after then cleaning2CO3The 10% of middle magnetic beads quality (after accounting for cleaning)
Mixing, calcines 2 hours at 800 DEG C, and cooling is placed in the NaOH solution that concentration is 1mol/L, stirring at low speed 2 hours,
Utilize permanent magnet obtain after separating aluminium salt and silicon salt mixed solution and in magnetic porous pottery, will in magnetic porous pottery with from the beginning
It is 9 that water and deionized water are washed till pH value, is then dried 2 hours at 110 DEG C.
3rd, the classification application of product
In can be used as the magnetic adsorbent that water processes after magnetic porous pottery and weak magnetic porous pottery surface treated and remove in water
Dye molecule and heavy metal ion.In, magnetic porous ceramic particle addition is mass ratio 2 ‰, low rate mixing absorption 2 hours
Under conditions of, in magnetic porous pottery to Cu2+The clearance of ion is up to 86.4% (as shown in Figure 3).After completing absorption
Magnetic porous pottery can quick through magnetic separator, all reclaim.
Ferromagnetism magnetic bead processes magnetic kind material for water after ball milling and surface treatment.Use it for the magnetic flocculation experiment of black water,
Result shows, under outside magnetic field effect, not only black water flocculation settling velocity improve, and supernatant fluid turbidity reduce by 30% with
On；Magnetic kind material in magnetic floc sedimentation can be recycled.
The mixed solution of aluminium salt and silicon salt, after desiliconization process, directly as carrying the raw material that aluminium produces, can realize industrial production.
Claims (5)
1. the resource utilization method of a Fly ash bead, it is characterised in that:
After flyash is crossed 120 mesh sieves, in high-intensity magnetic field, first carry out magnetic separation, it is thus achieved that all kinds of magnetic beads in flyash, then will
All kinds of magnetic beads carry out magnetic separation in low-intensity magnetic field, filter out ferromagnetism magnetic bead from all kinds of magnetic beads, finally again by remaining magnetic bead in
Magnetic field carries out magnetic separation, it is thus achieved that middle magnetic beads and weak magnetic beads；
Described weak magnetic beads is processed as follows: with water, described weak magnetic beads is carried out, to remove weak magnetic
Property magnetic bead surfaces absorption non magnetic micro mist, then will clean after weak magnetic beads and Na2CO3Mixing, forges at 720-850 DEG C
Burning 1-2 hour, cooling is placed in the aqueous slkali that concentration is 1-3mol/L, stirs 1-4 hour, obtains aluminium salt after Magneto separate
With the mixed solution of silicon salt and weak magnetic porous pottery；It after desiliconization process is carried out to the mixed solution of described aluminium salt and silicon salt, is used as
Carry the raw material that aluminium produces；Described weak magnetic porous pottery is used as magnetic adsorbent or bigger serface carrier；Na2CO3Quality is clear
The 5%-30% of weak magnetic beads quality after washing；
Described middle magnetic beads is processed as follows: with water, described middle magnetic beads is carried out, with magnetic in removal
Property magnetic bead surfaces absorption non magnetic micro mist, then will clean after middle magnetic beads and Na2CO3Mixing, forges at 720-850 DEG C
Burning 1-2 hour, cooling is placed in the aqueous slkali that concentration is 1-3mol/L, stirs 1-4 hour, obtains aluminium salt after Magneto separate
With the mixed solution of silicon salt and in magnetic porous pottery；It after desiliconization process is carried out to the mixed solution of described aluminium salt and silicon salt, is used as
Carry the raw material that aluminium produces；In described, magnetic porous pottery is used as magnetic adsorbent or bigger serface carrier；Na2CO3Quality is clear
The 5%-30% of magnetic beads quality in after washing；
Described ferromagnetism magnetic bead is used as the dense media that water processes magnetic kind material or heavy media coal separation.
2. resource utilization method according to claim 1, it is characterised in that:
Described aqueous slkali is NaOH solution, limewash or ammoniacal liquor.
3. resource utilization method according to claim 1, it is characterised in that: the magnetic field intensity of described high-intensity magnetic field is
300mT；The magnetic field intensity in described middle magnetic field is 100mT；The magnetic field intensity of described low-intensity magnetic field is 50mT.
4. resource utilization method according to claim 1, it is characterised in that: the specific saturation magnetization of ferromagnetism magnetic bead
＞ 14emu/g；Specific saturation magnetization≤the 14emu/g of 2.5emu/g≤middle magnetic beads；The ratio saturated magnetization of weak magnetic beads
Intensity < 2.5emu/g.
5. the resource utilization method according to claim 1 or 3, it is characterised in that: at high-intensity magnetic field, low-intensity magnetic field and middle magnetic
The number of times carrying out magnetic separation in Chang is 2～4 times.
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Cited By (1)
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| CN106215821B (en) * | 2016-08-12 | 2018-08-17 | 江苏泽成生物技术有限公司 | A kind of preparation method of magnetic microparticle chemiluminescence immune assay reagent carboxyl magnetic bead |
| CN107032695B (en) * | 2017-03-20 | 2020-02-07 | 张家港江苏科技大学产业技术研究院 | Steel fiber self-compacting concrete, preparation method thereof and prefabricated part |
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Effective date of registration: 20230105 Address after: 232001 506, Floor 5, Building A, Innovation and Entrepreneurship Center, Taining Street, Shannan New District, Huainan City, Anhui Province Patentee after: Huainan Chiyang Intelligent Selection Technology Co.,Ltd. Address before: 232001 No. 168 middle tillage Road, Huainan, Anhui Patentee before: Anhui University of Science and Technology |