CN105562423A - Melting treatment method for waste incineration flying ash - Google Patents

Melting treatment method for waste incineration flying ash Download PDF

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Publication number
CN105562423A
CN105562423A CN201610003075.4A CN201610003075A CN105562423A CN 105562423 A CN105562423 A CN 105562423A CN 201610003075 A CN201610003075 A CN 201610003075A CN 105562423 A CN105562423 A CN 105562423A
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China
Prior art keywords
flying dust
treatment
melting process
incineration
mud
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CN201610003075.4A
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CN105562423B (en
Inventor
李江山
薛强
王平
张亭亭
孟思明
陈亿军
许越
王国菲
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Jiangsu Zhongyi Ecological Soil Institute Co ltd
Wuhan Institute of Rock and Soil Mechanics of CAS
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Jiangsu Zhongyi Ecological Soil Institute Co ltd
Wuhan Institute of Rock and Soil Mechanics of CAS
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Priority to CN201610003075.4A priority Critical patent/CN105562423B/en
Publication of CN105562423A publication Critical patent/CN105562423A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09BDISPOSAL OF SOLID WASTE
    • B09B3/00Destroying solid waste or transforming solid waste into something useful or harmless
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09BDISPOSAL OF SOLID WASTE
    • B09B5/00Operations not covered by a single other subclass or by a single other group in this subclass

Abstract

The invention relates to a melting treatment method for waste incineration flying ash, and belongs to the technical field of environmental engineering. The treatment method comprises the following steps of carrying out pretreatment on the waste incineration flying ash to form treated flying ash; uniformly mixing the treated flying ash with sludge to form a mixture of the flying ash and the sludge; carrying out solidification and stabilization on the mixture of the flying ash and the sludge to form a solidified body; and carrying out melting treatment on the solidified body. The treatment method can effectively solve the problems that the caloric value in the flying ash is relatively low, and heavy metals in the flying ash are liable to volatilize, so that pipeline blockage in a flying ash conveying process is avoided; and the melting treatment method is good in treatment effect, is low in cost, is free from secondary pollution, and is high in resource utilization.

Description

A kind of incineration of refuse flyash melting process for the treatment of
Technical field
The present invention relates to field of environment engineering technology, particularly a kind of incineration of refuse flyash melting process for the treatment of.
Background technology
In recent years, due to consumer waste incineration process have that minimizing is large, resource utilization high and more and more receiving publicity.But can produce poison gas, end slag and flying dust in incineration treatment of garbage process, this also constrains applying of this technology.Therefore, Pollution in Municipal Solid Waste Incineration is controlled to the focus in order to field of environment engineering research.For incineration of refuse flyash, its output is approximately the 2%-5% of house refuse quality, not only containing Pb, Hg in flying dust, the heavy metal contaminants of the high concentrations such as Cu, Cd, Zn, Ni and Cr, also containing organic pollutions such as two English, therefore, incineration of refuse flyash is put into danger wastes register.Incineration of refuse flyash has extremely strong teratogenesis and carcinogenic toxicity, once arbitrarily be discharged in environment, its harmfulness is self-evident.
At present, the innoxious process for treating of incineration of refuse flyash has melting/glass solidification, cement solidification, chemically stable method, acid or other solvent wash method etc.Melting/glass solidification technology because of its have simple to operate, process thoroughly, the good and advantages such as security height of reduction, become the processing method that developed country in the world more generally adopts, meanwhile, vitreum can be used as building materials and realizes recycling.China generally adopts curing/stabilizing method disposal of refuse flying ash, then firming body is carried out security landfill, the Environmental capacity condition of landfill yard to flying dust admission is higher, as in clear stipulaties flying dust in GB16889, the leaching concentration higher limit of Pb is 0.25ppm, the leaching concentration higher limit of As is 0.3ppm, this proposes higher requirement to flying dust treatment technology, and corresponding processing cost improves.The long-time stability of flyash curing stabilization processes are unknown, and along with the minimizing of landfill yard storage capacity, the method can not be a kind of continuable technology.
The fusing fly ash treatment technology adopted in prior art is fused into liquid state under the condition of high temperature of incineration of refuse flyash more than 1300 DEG C, again by molten slag through air cooling or Water Quenching, produce glassy state slag, but because chloride content in flying dust is high, calorific value is low, easy blocking pipe in course of conveying, result in that fusing fly ash processing cost is high, the outstanding and inconvenient operation of secondary pollution phenomenon.Meanwhile, in the vitreous slag that melting is formed, heavy metal is not stablized, and has leaching risk.
Summary of the invention
A kind of incineration of refuse flyash melting process for the treatment of that the application provides, solve or partly solve flying dust easy blocking pipe in course of conveying of fusing fly ash treatment technology in prior art, fusing fly ash processing cost is high, secondary pollution phenomenon is given prominence to, in slag, heavy metal has the technical problem leaching risk, achieve and avoid blocking pipe in fly ash carry process, solve that calorific value in flying dust is on the low side and heavy metal is volatile, treatment effect is good and with low cost, non-secondary pollution, the technique effect that recycling is high.
This application provides a kind of incineration of refuse flyash melting process for the treatment of, comprise the following steps:
Described incineration of refuse flyash is carried out pretreatment, flying dust after formation processing;
By flying dust after described process and mud Homogeneous phase mixing, form flying dust mud mixture;
Described flying dust mud mixture is cured stabilisation, forms firming body;
Described firming body is carried out melt process.
As preferably, described incineration of refuse flyash is carried out pretreatment, comprising:
By described incineration of refuse flyash and water Homogeneous phase mixing, form flying dust slurries;
Described flying dust slurries are stirred;
Air-dry after described flying dust slurries after stirring are carried out filtration, flying dust after formation processing;
Wherein, the mass ratio that described incineration of refuse flyash mixes with water controls as 1:8 ~ 1:12; The time controling of described stirring is 50 ~ 70min.
As preferably, described incineration of refuse flyash mixes according to mass ratio 1:10 with water, and described water is running water;
The mixing time of described flying dust slurries is 60min;
The described centrifuge that is filtered through completes.
As preferably, described incineration of refuse flyash mixes according to mass ratio 1:10 with water, and described water is river;
The mixing time of described flying dust slurries is 60min;
The described plate and frame filter press that is filtered through completes.
As preferably, the mass ratio that after described process, flying dust mixes with described mud controls as 9:1 ~ 11:1;
Described mud is Municipal dewatered sludge, and the moisture content of described Municipal dewatered sludge is lower than 80%.
As preferably, after described process, flying dust mixes according to mass ratio 10:1 with described mud;
Described mud is Municipal dewatered sludge, and the moisture content of described Municipal dewatered sludge is lower than 80%.
As preferably, described flying dust mud mixture is cured stabilisation, comprises:
Ardealite and cement is added in described flying dust mud mixture;
Described firming body is compressed into after described flying dust mud mixture, ardealite and cement mixing is even;
Wherein, the mass ratio of described flying dust mud mixture, ardealite and cement controls as 90:20:20 ~ 110:20:20.
As preferably, the particle diameter of described ardealite is not less than 100 orders; Calculate by percentage to the quality, in described ardealite, the content of calcium oxide is greater than 30%;
The mass ratio of described flying dust mud mixture, ardealite and cement controls as 100:20:20.
As preferably, described firming body is carried out melt process, comprising:
Described firming body is carried out heating and melting process by plasma melting furnace, forms molten mass;
Described molten mass is carried out the cold aftershaping of shrend;
Wherein, the temperature of described heating and melting process controls to be 1000 ~ 1300 DEG C, and time controling is 30min.
As preferably, the tail gas produced in described heating and melting process discharges after carrying out desulphurization denitration process by exhaust gas processing device.
A kind of incineration of refuse flyash melting process for the treatment of provided by the invention, adopt the soluble chloride in washing removal flying dust, reduce the volatilization of fusing fly ash heavy metals in process, incineration of refuse flyash and mud are worked in coordination with melt process, solve the difficult problem that incineration of refuse flyash calorific value is on the low side, save melt process cost, achieve again the safe handling of mud, realize higher resource utilization rate, ardealite and cement is adopted to be cured stabilization processes to incineration of refuse flyash and mud, in ardealite, calcium oxide regulates flying dust base ratio, the viscosity of fusing fly ash liquid reduces, heat transfer efficiency improves, basic anhydride in ardealite and cement can reduce the volatilization of heavy metal in flying dust, phosphorus can be stablized heavy metal in flying dust, avoid secondary pollution, the firming body formed solves the problem of flying dust feeding blocking pipe, this melting process for the treatment of is by flying dust pretreatment, flying dust and mud associated treatment, the technology such as solidification and stabilization process, it is on the low side that system solves calorific value in flying dust, volatile and the difficult problem that is easily blocking pipe of heavy metal, there is treatment effect good, non-secondary pollution, the feature that with low cost and recycling is high.
Accompanying drawing explanation
The flow chart of the incineration of refuse flyash melting process for the treatment of that Fig. 1 provides for the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is explained in further detail:
The embodiment of the present application provides a kind of incineration of refuse flyash melting process for the treatment of, solve or partly solve flying dust easy blocking pipe in course of conveying of fusing fly ash treatment technology in prior art, fusing fly ash processing cost is high, secondary pollution phenomenon is given prominence to, in slag, heavy metal has the technical problem leaching risk, the soluble chloride in flying dust is removed by washing, incineration of refuse flyash and mud are worked in coordination with melt process, ardealite and cement is adopted to be cured stabilization processes to incineration of refuse flyash and mud, achieve and avoid blocking pipe in fly ash carry process, solve that calorific value in flying dust is on the low side and heavy metal is volatile, treatment effect is good and with low cost, non-secondary pollution, the technique effect that recycling is high.
See accompanying drawing 1, a kind of incineration of refuse flyash melting process for the treatment of that the embodiment of the present application provides comprises the following steps:
S1: incineration of refuse flyash is carried out pretreatment, flying dust after formation processing.
S2: flying dust and mud Homogeneous phase mixing after processing, form flying dust mud mixture.
S3: flying dust mud mixture is cured stabilisation, forms firming body.
S4: firming body is carried out melt process.
Further, step S1 comprises: S101: by incineration of refuse flyash and water Homogeneous phase mixing, forms flying dust slurries; S102: flying dust slurries are stirred; S103: air-dry after the flying dust slurries after stirring are carried out filtration, flying dust after formation processing; Wherein, the mass ratio that incineration of refuse flyash mixes with water controls as 1:8 ~ 1:12; The time controling stirred is 50 ~ 70min.
Wherein, as a kind of preferred embodiment, the incineration of refuse flyash in step S101 mixes according to mass ratio 1:10 with water, and water is running water; The mixing time of the flying dust slurries in step S102 is 60min; The centrifuge that is filtered through in step S103 completes.As another kind of preferred embodiment, the incineration of refuse flyash in step S101 mixes according to mass ratio 1:10 with water, and water is river; The mixing time of the flying dust slurries in step S102 is 60min; The plate and frame filter press that is filtered through in step S103 completes.
Further, the mass ratio that after the process of step S2, flying dust mixes with mud controls as 9:1 ~ 11:1; Mud is Municipal dewatered sludge, and the moisture content of Municipal dewatered sludge is lower than 80%.As a kind of preferred embodiment, after the process of step S2, flying dust mixes according to mass ratio 10:1 with mud; Mud is Municipal dewatered sludge, and the moisture content of Municipal dewatered sludge is lower than 80%.
Further, step S3 comprises: S301: in flying dust mud mixture, add ardealite and cement; S302: be compressed into firming body after flying dust mud mixture, ardealite and cement mixing is even; Wherein, the particle diameter of ardealite is not less than 100 orders; Calculate by percentage to the quality, in ardealite, the content of calcium oxide is greater than 30%; The mass ratio of flying dust mud mixture, ardealite and cement controls as 90:20:20 ~ 110:20:20.As a kind of preferred embodiment, the mass ratio of flying dust mud mixture, ardealite and cement controls as 100:20:20.
Further, step S4 comprises: S401: firming body is carried out heating and melting process by plasma melting furnace, forms molten mass; S402: molten mass is carried out the cold aftershaping of shrend; Wherein, the temperature of heating and melting process controls to be 1000 ~ 1300 DEG C, and time controling is 30min.
Further, the tail gas produced in heating and melting process discharges after carrying out desulphurization denitration process by exhaust gas processing device.
Below in conjunction with specific embodiment, the melting process for the treatment of that the application provides is further described:
Case study on implementation 1
8 tons of running water are added to 1 ton of incineration of refuse flyash, mix, stir 50min, air-dry after adopting plate and frame filter press press filtration, the Municipal dewatered sludge being 75% by flying dust and 111kg moisture content after the process after air-dry mixes, form flying dust mud mixture, ardealite and cement is added in flying dust mud mixture, ardealite particle diameter is 200 orders, in ardealite, the content of calcium oxide is 35%, cement is Portland cement, the quality of ardealite and cement is 247kg, firming body is compressed into after stirring, firming body is moved in plasma melting furnace, 30min is kept under 1000 DEG C of conditions, shrend cold forming, tail gas discharges after desulphurization denitration process.
Case study on implementation 2
10 tons of running water are added to 1 ton of incineration of refuse flyash, mix, stir 60min, air-dry after adopting centrifuge dewatering, the Municipal dewatered sludge being 80% by flying dust and 100kg moisture content after the process after air-dry mixes, form flying dust mud mixture, ardealite and cement is added in flying dust mud mixture, ardealite particle diameter is 150 orders, in ardealite, the content of calcium oxide is 30%, cement is Portland cement, the quality of ardealite and cement is 220kg, firming body is compressed into after stirring, firming body is moved in plasma melting furnace, 30min is kept under 1200 DEG C of conditions, shrend cold forming, tail gas discharges after desulphurization denitration process.
Case study on implementation 3
12 tons of running water are added to 1 ton of incineration of refuse flyash, mix, stir 70min, air-dry after adopting plate and frame filter press press filtration, the Municipal dewatered sludge being 80% by flying dust and 90.9kg moisture content after the process after air-dry mixes, form flying dust mud mixture, ardealite and cement is added in flying dust mud mixture, ardealite particle diameter is 100 orders, in ardealite, the content of calcium oxide is 33%, cement is Portland cement, the quality of ardealite and cement is 198kg, firming body is compressed into after stirring, firming body is moved in plasma melting furnace, 30min is kept under 1300 DEG C of conditions, shrend cold forming, tail gas discharges after desulphurization denitration process.
Drawn by above-mentioned three embodiments, effectively can solve the on the low side and volatile problem of heavy metal of calorific value in flying dust by this melting process for the treatment of disposal of refuse flying ash, avoid blocking pipe in fly ash carry process, treatment effect is good and with low cost, non-secondary pollution, recycling is high.
A kind of incineration of refuse flyash melting process for the treatment of provided by the invention, adopt the soluble chloride in washing removal flying dust, reduce the volatilization of fusing fly ash heavy metals in process, incineration of refuse flyash and mud are worked in coordination with melt process, solve the difficult problem that incineration of refuse flyash calorific value is on the low side, save melt process cost, achieve again the safe handling of mud, realize higher resource utilization rate, ardealite and cement is adopted to be cured stabilization processes to incineration of refuse flyash and mud, in ardealite, calcium oxide regulates flying dust base ratio, the viscosity of fusing fly ash liquid reduces, heat transfer efficiency improves, basic anhydride in ardealite and cement can reduce the volatilization of heavy metal in flying dust, phosphorus can be stablized heavy metal in flying dust, avoid secondary pollution, the firming body formed solves the problem of flying dust feeding blocking pipe, this melting process for the treatment of is by flying dust pretreatment, flying dust and mud associated treatment, the technology such as solidification and stabilization process, it is on the low side that system solves calorific value in flying dust, volatile and the difficult problem that is easily blocking pipe of heavy metal, there is treatment effect good, non-secondary pollution, the feature that with low cost and recycling is high.
Above-described detailed description of the invention; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only the specific embodiment of the present invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. an incineration of refuse flyash melting process for the treatment of, is characterized in that, described melting process for the treatment of comprises the following steps:
Described incineration of refuse flyash is carried out pretreatment, flying dust after formation processing;
By flying dust after described process and mud Homogeneous phase mixing, form flying dust mud mixture;
Described flying dust mud mixture is cured stabilisation, forms firming body;
Described firming body is carried out melt process.
2. melting process for the treatment of as claimed in claim 1, is characterized in that, described incineration of refuse flyash is carried out pretreatment, comprising:
By described incineration of refuse flyash and water Homogeneous phase mixing, form flying dust slurries;
Described flying dust slurries are stirred;
Air-dry after described flying dust slurries after stirring are carried out filtration, flying dust after formation processing;
Wherein, the mass ratio that described incineration of refuse flyash mixes with water controls as 1:8 ~ 1:12; The time controling of described stirring is 50 ~ 70min.
3. melting process for the treatment of as claimed in claim 2, is characterized in that,
Described incineration of refuse flyash mixes according to mass ratio 1:10 with water, and described water is running water;
The mixing time of described flying dust slurries is 60min;
The described centrifuge that is filtered through completes.
4. melting process for the treatment of as claimed in claim 2, is characterized in that,
Described incineration of refuse flyash mixes according to mass ratio 1:10 with water, and described water is river;
The mixing time of described flying dust slurries is 60min;
The described plate and frame filter press that is filtered through completes.
5. melting process for the treatment of as claimed in claim 1, is characterized in that,
The mass ratio that after described process, flying dust mixes with described mud controls as 9:1 ~ 11:1;
Described mud is Municipal dewatered sludge, and the moisture content of described Municipal dewatered sludge is lower than 80%.
6. melting process for the treatment of as claimed in claim 1, is characterized in that,
After described process, flying dust mixes according to mass ratio 10:1 with described mud;
Described mud is Municipal dewatered sludge, and the moisture content of described Municipal dewatered sludge is lower than 80%.
7. melting process for the treatment of as claimed in claim 1, is characterized in that, described flying dust mud mixture is cured stabilisation, comprises:
Ardealite and cement is added in described flying dust mud mixture;
Described firming body is compressed into after described flying dust mud mixture, ardealite and cement mixing is even;
Wherein, the mass ratio of described flying dust mud mixture, ardealite and cement controls as 90:20:20 ~ 110:20:20.
8. melting process for the treatment of as claimed in claim 7, is characterized in that,
The particle diameter of described ardealite is not less than 100 orders; Calculate by percentage to the quality, in described ardealite, the content of calcium oxide is greater than 30%;
The mass ratio of described flying dust mud mixture, ardealite and cement controls as 100:20:20.
9. melting process for the treatment of as claimed in claim 1, is characterized in that, described firming body is carried out melt process, comprising:
Described firming body is carried out heating and melting process by plasma melting furnace, forms molten mass;
Described molten mass is carried out the cold aftershaping of shrend;
Wherein, the temperature of described heating and melting process controls to be 1000 ~ 1300 DEG C, and time controling is 30min.
10. melting process for the treatment of as claimed in claim 1, is characterized in that,
The tail gas produced in described heating and melting process discharges after carrying out desulphurization denitration process by exhaust gas processing device.
CN201610003075.4A 2016-01-04 2016-01-04 A kind of incineration of refuse flyash melting process for the treatment of Active CN105562423B (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106082646A (en) * 2016-06-15 2016-11-09 上海大学 Electroplating sludge and domestic garbage incineration flyash is utilized to work in coordination with the melted method preparing glass sand
CN106217925A (en) * 2016-08-02 2016-12-14 天津泰达环保有限公司 A kind of method of pretreatment before incineration of refuse flyash is melted
CN106424077A (en) * 2016-09-12 2017-02-22 中国科学院城市环境研究所 Method for treating fly sh by sludge
CN106984633A (en) * 2017-05-03 2017-07-28 江苏天楹环保能源成套设备有限公司 Utilize the method for plasma torch recycling treatment incineration of refuse flyash
CN107030093A (en) * 2017-05-03 2017-08-11 江苏天楹环保能源成套设备有限公司 One kind combines washing and plasma fusion handles flying ash system
CN107812771A (en) * 2016-09-12 2018-03-20 永续发展股份有限公司 Offal treatment reutilization system
CN112275781A (en) * 2020-10-27 2021-01-29 内蒙古财经大学 Recycling method of fly ash
CN112876188A (en) * 2021-01-29 2021-06-01 长江师范学院 Phosphogypsum and waste incineration fly ash cooperative curing method and application
CN113024214A (en) * 2021-02-23 2021-06-25 中冶南方都市环保工程技术股份有限公司 Method for solidifying and stabilizing fly ash by cooperation of phosphogypsum and red mud

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JPH11156337A (en) * 1997-11-20 1999-06-15 Tsukishima Kikai Co Ltd Effective use of incineration fly ash
CN101279825A (en) * 2008-05-20 2008-10-08 上海大学 Method for cooperative reclaiming flyash and sludge in refuse incineration
CN102060560A (en) * 2010-11-18 2011-05-18 天津泰达环保有限公司 Method for preparing haydite from wet sludge and incineration fly ash
CN104324931A (en) * 2014-11-12 2015-02-04 中国科学院武汉岩土力学研究所 Solidifying/stabilizing treatment method for waste incineration fly ash

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JPH11156337A (en) * 1997-11-20 1999-06-15 Tsukishima Kikai Co Ltd Effective use of incineration fly ash
CN101279825A (en) * 2008-05-20 2008-10-08 上海大学 Method for cooperative reclaiming flyash and sludge in refuse incineration
CN102060560A (en) * 2010-11-18 2011-05-18 天津泰达环保有限公司 Method for preparing haydite from wet sludge and incineration fly ash
CN104324931A (en) * 2014-11-12 2015-02-04 中国科学院武汉岩土力学研究所 Solidifying/stabilizing treatment method for waste incineration fly ash

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106082646A (en) * 2016-06-15 2016-11-09 上海大学 Electroplating sludge and domestic garbage incineration flyash is utilized to work in coordination with the melted method preparing glass sand
CN106082646B (en) * 2016-06-15 2019-06-04 上海大学 The method for cooperateing with melting to prepare glass sand with domestic garbage incineration flyash using electroplating sludge
CN106217925A (en) * 2016-08-02 2016-12-14 天津泰达环保有限公司 A kind of method of pretreatment before incineration of refuse flyash is melted
CN106424077A (en) * 2016-09-12 2017-02-22 中国科学院城市环境研究所 Method for treating fly sh by sludge
CN107812771A (en) * 2016-09-12 2018-03-20 永续发展股份有限公司 Offal treatment reutilization system
CN106984633A (en) * 2017-05-03 2017-07-28 江苏天楹环保能源成套设备有限公司 Utilize the method for plasma torch recycling treatment incineration of refuse flyash
CN107030093A (en) * 2017-05-03 2017-08-11 江苏天楹环保能源成套设备有限公司 One kind combines washing and plasma fusion handles flying ash system
CN106984633B (en) * 2017-05-03 2019-02-01 江苏天楹环保能源成套设备有限公司 Utilize the method for plasma torch recycling treatment incineration of refuse flyash
CN112275781A (en) * 2020-10-27 2021-01-29 内蒙古财经大学 Recycling method of fly ash
CN112876188A (en) * 2021-01-29 2021-06-01 长江师范学院 Phosphogypsum and waste incineration fly ash cooperative curing method and application
CN113024214A (en) * 2021-02-23 2021-06-25 中冶南方都市环保工程技术股份有限公司 Method for solidifying and stabilizing fly ash by cooperation of phosphogypsum and red mud

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