CN101333084A - Technological process for preprocessing refuse burning fly-ash to be cement raw materials - Google Patents

Technological process for preprocessing refuse burning fly-ash to be cement raw materials Download PDF

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Publication number
CN101333084A
CN101333084A CNA2008100411342A CN200810041134A CN101333084A CN 101333084 A CN101333084 A CN 101333084A CN A2008100411342 A CNA2008100411342 A CN A2008100411342A CN 200810041134 A CN200810041134 A CN 200810041134A CN 101333084 A CN101333084 A CN 101333084A
Authority
CN
China
Prior art keywords
cement
refuse
incineration
flyash
heavy metal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CNA2008100411342A
Other languages
Chinese (zh)
Inventor
钱光人
吴奇芳
邹庐泉
蒲敏
孙福成
傅沪鸣
杨晓燕
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
University of Shanghai for Science and Technology
Original Assignee
University of Shanghai for Science and Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by University of Shanghai for Science and Technology filed Critical University of Shanghai for Science and Technology
Priority to CNA2008100411342A priority Critical patent/CN101333084A/en
Publication of CN101333084A publication Critical patent/CN101333084A/en
Pending legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
    • C04B7/434—Preheating with addition of fuel, e.g. calcining
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
    • C04B18/10—Burned or pyrolised refuse
    • C04B18/105—Gaseous combustion products or dusts collected from waste incineration, e.g. sludge resulting from the purification of gaseous combustion products of waste incineration
    • C04B18/106—Fly ash from waste incinerators
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Abstract

The invention provides a technique which makes the solid waste incineration fly ash into cement raw materials, comprising the following steps: washing, stirring, adding heavy metal stabilizer, separating liquid from solid waste incineration fly ash, mixing the solid waste incineration fly ash into the cement raw meal and sending the raw meal into a cement rotary kiln to calcine the raw meal so as to prepare the cement clinker. The invention also provides a method for treating the wastewater generated in the washing process. The solid waste incineration fly ash treated through the method disclosed in the invention can partially substitute for cement raw materials to prepare cement, while all the indicators of the cement can meet the relevant standards so as to effectively realize solid waste incineration fly ash resource utilization.

Description

A kind of pretreatment of refuse burning flyash becomes the processing method of cement raw material
Technical field
The present invention relates to changing waste into resources and utilize technology, be specifically related to the processing method that a kind of pretreatment of refuse burning flyash becomes cement raw material.
Background technology
The main chemical compositions of incineration of refuse flyash is CaO, SiO 2, Al 2O 3And Fe 2O 3Deng.Cement matrix mainly forms with feedstock production such as Wingdale, clays, and its main chemical compositions is CaO, SiO 2, A1 2O 3Deng, be the various lots of material of a class, can be used as the matrix that receives that receives in a large number with the treating refuse incineration residue.If can receive in the manufacture of cement and the treating refuse flying ash, if receive and handle 0.01 ton of (promptly 1%) flying dust calculating to produce cement per ton, its meaning is apparent.
Theoretical analysis as can be known, therefore the main component and the cement clinker of incineration of refuse flyash are close, can part replace lime stone, clay etc. mixes that calcining generates cement clinker in the cement raw material, thereby realize the recycling of incineration of refuse flyash.
Yet, there are a large amount of villaumites, heavy metal and a considerable amount of organic pollutant in the incineration of refuse flyash, make the flying dust recycling increase difficulty: the one,, the chlorine that is rich in incineration of refuse flyash form volatilization in the cement rotary kiln calcination process with metal chloride under hot conditions can form rotary kiln " skinning ", and cl content is too high in the cement clinker will cause the steel bars in concrete corrosion, and villaumite also can hinder the hydration of cement; The 2nd,, the heavy metal vaporization at high temperature in the incineration of refuse flyash will cause the obstruction of cement kiln; The 3rd,, the eco-cement that incineration of refuse flyash substitutes part cement feedstock production must meet existing Hazardous Wastes Management laws and regulations requirement, promptly must answer the stabilization of heavy metal and the control problem of dioxin.
Summary of the invention
The purpose of this invention is to provide a kind of pretreatment of refuse burning flyash and make its processing method that becomes the part cement raw material, thus the recycling of realization incineration of refuse flyash.
To achieve these goals, processing method provided by the invention and step are as follows:
The first step drops into incineration of refuse flyash and the water ratio in 1: 8～1: 12 in the water washing and precipitating pond, carries out mechanical stirring;
Second step, stir when being washed to 20min, in the water washing and precipitating pond, add 2～3% heavy metal stabilizers of flying ash quality, continue then to stir;
In the 3rd step, stirring is washed to more than the 30min, leaves standstill 20～30min then;
In the 4th step, sampling and testing adopts the chlorine element determination instrument of stipulating in the determination of chloride ion standard method in the Cement industry to measure residual chlorine ion content in the flying dust, and chloride ion content is lower than 1% for qualified, is higher than 1% and continues to be washed to cl content and be lower than 1%; Then liquid is separated with incineration of refuse flyash; The liquid of separating enters the wastewater treatment program;
The 5th step, pretreated incineration of refuse flyash is mixed in the cement slurry behind the mixing in 1～3% ratio, send in the cement rotary kiln calcining preparation cement clinker under 1000～1450 ℃ of hot conditionss.
The waste water that produces in the above-mentioned washing process can be with any processing the in following two kinds of methods:
Method one: in waste water, add CO 2After the gas carbonization, add heavy metal stabilizer then and handle.
Method two: add acid and regulate wastewater pH, and then add the heavy metal flocculation agent and handle to neutral.
Incineration of refuse flyash cl content after the inventive method is handled is reduced to below 1%; Solvable heavy metal has been realized innoxious after washing in the flying dust; The heavy metal stabilizer that adds has effectively suppressed the vaporization at high temperature of heavy metal in the incineration of refuse flyash; The waste water that the washing pre-treatment produces reaches state sewage emission standard after carbonization-stable or acidifying-chelation treatment.Owing to utilize every index of the cement of the alternative part cement feedstock production of incineration of refuse flyash after the inventive method is handled to satisfy relevant criterion, thereby effectively realized the recycling of incineration of refuse flyash.
Embodiment
The invention will be further described below in conjunction with embodiment.
Present embodiment is undertaken by following processing method and step:
The first step drops into incineration of refuse flyash and the water ratio in 1: 10 in the water washing and precipitating pond, carries out mechanical stirring, to reach the purpose that solubility villaumite and heavy metal in the flying dust are removed;
Second step in order effectively to suppress the vaporization at high temperature of heavy metal in the incineration of refuse flyash, when stirring is washed to 20min, added 2.5% heavy metal stabilizer of flying ash quality in the water washing and precipitating pond, continue then to stir;
The 3rd step, stir and to be washed to 35min, leave standstill about 30min then, all sink to the pond to incineration of refuse flyash and water stratification at the bottom of;
In the 4th step, measure residual chlorine ion content in the flying dust with chlorine element determination instrument, below the control chloride ion content to 0.88%; Then liquid is expelled to purification tank for liquid waste by the mouth of pipe, separates with incineration of refuse flyash;
The 5th step, pretreated incineration of refuse flyash is mixed in the cement slurry in 2% ratio, send into behind the mixing and under 1000-1450 ℃ of hot conditions, calcine the preparation cement clinker in the cement rotary kiln; The toxic pollutants overwhelming majority such as De dioxin obtains decomposing in the incineration of refuse flyash in this step process.
Waste water is handled by the following method:
The first step adds sulfuric acid to waste water, regulates about pH to 7.0;
In second step, add heavy metal flocculation agent stir process.
By above method, every index of the cement of present embodiment preparation satisfies relevant criterion, and wherein cement clinker strength reached 38MPa in 3 days, and wastewater treatment reaches relevant sewage drainage standard.

Claims (3)

1. a pretreatment of refuse burning flyash becomes the processing method of cement raw material, carries out with method as follows:
The first step drops into incineration of refuse flyash and the water ratio in 1: 8～1: 12 in the water washing and precipitating pond, carries out mechanical stirring;
Second step, stir when being washed to 20min, in the water washing and precipitating pond, add 2～3% heavy metal stabilizers of flying ash quality, continue then to stir;
In the 3rd step, stirring is washed to more than the 30min, leaves standstill 20～30min then;
In the 4th step, sampling and testing adopts the chlorine element determination instrument of stipulating in the determination of chloride ion standard method in the Cement industry to measure residual chlorine ion content in the flying dust, and chloride ion content is lower than 1% for qualified, is higher than 1% and continues to be washed to cl content and be lower than 1%; Then liquid is separated with incineration of refuse flyash; The liquid of separating enters the wastewater treatment program;
The 5th step, pretreated incineration of refuse flyash is mixed in the cement slurry behind the mixing in 1～3% ratio, send in the cement rotary kiln calcining preparation cement clinker under 1000～1450 ℃ of hot conditionss.
2. a kind of pretreatment of refuse burning flyash according to claim 1 becomes the processing method of cement raw material, it is characterized in that, described wastewater treatment program is carried out with method as follows:
The first step adds acid to waste water, regulates about pH to 7.0;
In second step, add heavy metal flocculation agent stir process.
3. a kind of pretreatment of refuse burning flyash according to claim 1 becomes the processing method of cement raw material, it is characterized in that, the step and the method for described wastewater treatment program are: add CO in waste water 2After the gas carbonization, add heavy metal stabilizer then and handle.
CNA2008100411342A 2008-07-29 2008-07-29 Technological process for preprocessing refuse burning fly-ash to be cement raw materials Pending CN101333084A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNA2008100411342A CN101333084A (en) 2008-07-29 2008-07-29 Technological process for preprocessing refuse burning fly-ash to be cement raw materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNA2008100411342A CN101333084A (en) 2008-07-29 2008-07-29 Technological process for preprocessing refuse burning fly-ash to be cement raw materials

Publications (1)

Publication Number Publication Date
CN101333084A true CN101333084A (en) 2008-12-31

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101913785A (en) * 2010-07-19 2010-12-15 郑慧 Incineration fly ash cement kiln synergic processing process
CN101935174A (en) * 2010-09-21 2011-01-05 浙江工商大学 Method for improving mixing ratio of burning ash in cement raw materials
CN102267804A (en) * 2011-05-03 2011-12-07 大连东泰产业废弃物处理有限公司 Pretreatment method of industrial waste incineration slag through co-treatment with cement kiln
CN102923978A (en) * 2012-10-31 2013-02-13 沈阳航空航天大学 Method for preparing sulphoaluminate cement raw material by using incineration fly ash and formula of sulphoaluminate cement
CN101773924B (en) * 2010-01-29 2014-04-16 清华大学 Cooperatively preprocessing method of solid waste incineration flying ash cement kiln of returned effluent
CN111692593A (en) * 2020-06-15 2020-09-22 浙江红狮环保股份有限公司 Method for cooperatively treating organic hazardous waste in cement kiln
CN111732353A (en) * 2020-07-17 2020-10-02 长沙紫宸科技开发有限公司 Method for treating sand-based waste incineration fly ash by using cement kiln in cooperation
CN111777344A (en) * 2020-07-17 2020-10-16 长沙紫宸科技开发有限公司 Method for treating waste incineration fly ash as admixture by cooperation of cement kiln
CN113683322A (en) * 2021-09-09 2021-11-23 西南科技大学 Method for physical and chemical separation of waste incineration fly ash and preparation of cementing material
CN116462429A (en) * 2023-06-20 2023-07-21 常熟理工学院 Method for preparing cementing material by cooperatively disposing waste incineration fly ash and manganese slag

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101773924B (en) * 2010-01-29 2014-04-16 清华大学 Cooperatively preprocessing method of solid waste incineration flying ash cement kiln of returned effluent
CN101913785A (en) * 2010-07-19 2010-12-15 郑慧 Incineration fly ash cement kiln synergic processing process
CN101913785B (en) * 2010-07-19 2013-08-07 郑慧 Incineration fly ash cement kiln synergic processing process
CN101935174A (en) * 2010-09-21 2011-01-05 浙江工商大学 Method for improving mixing ratio of burning ash in cement raw materials
CN101935174B (en) * 2010-09-21 2012-12-05 浙江工商大学 Method for improving mixing ratio of burning ash in cement raw materials
CN102267804A (en) * 2011-05-03 2011-12-07 大连东泰产业废弃物处理有限公司 Pretreatment method of industrial waste incineration slag through co-treatment with cement kiln
CN102923978A (en) * 2012-10-31 2013-02-13 沈阳航空航天大学 Method for preparing sulphoaluminate cement raw material by using incineration fly ash and formula of sulphoaluminate cement
CN102923978B (en) * 2012-10-31 2014-08-20 沈阳航空航天大学 Method for preparing sulphoaluminate cement raw material by using incineration fly ash and formula of sulphoaluminate cement
CN111692593A (en) * 2020-06-15 2020-09-22 浙江红狮环保股份有限公司 Method for cooperatively treating organic hazardous waste in cement kiln
CN111692593B (en) * 2020-06-15 2022-04-26 浙江红狮环保股份有限公司 Method for cooperatively treating organic hazardous waste in cement kiln
CN111732353A (en) * 2020-07-17 2020-10-02 长沙紫宸科技开发有限公司 Method for treating sand-based waste incineration fly ash by using cement kiln in cooperation
CN111777344A (en) * 2020-07-17 2020-10-16 长沙紫宸科技开发有限公司 Method for treating waste incineration fly ash as admixture by cooperation of cement kiln
CN111777344B (en) * 2020-07-17 2022-04-22 长沙紫宸科技开发有限公司 Method for treating waste incineration fly ash as admixture by cooperation of cement kiln
CN113683322A (en) * 2021-09-09 2021-11-23 西南科技大学 Method for physical and chemical separation of waste incineration fly ash and preparation of cementing material
CN113683322B (en) * 2021-09-09 2023-02-17 西南科技大学 Method for physical and chemical separation of waste incineration fly ash and preparation of cementing material
CN116462429A (en) * 2023-06-20 2023-07-21 常熟理工学院 Method for preparing cementing material by cooperatively disposing waste incineration fly ash and manganese slag
CN116462429B (en) * 2023-06-20 2023-09-22 常熟理工学院 Method for preparing cementing material by cooperatively disposing waste incineration fly ash and manganese slag

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Open date: 20081231