CN102218428A - Treatment method of arsenic slag - Google Patents
Treatment method of arsenic slag Download PDFInfo
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- CN102218428A CN102218428A CN2011100245772A CN201110024577A CN102218428A CN 102218428 A CN102218428 A CN 102218428A CN 2011100245772 A CN2011100245772 A CN 2011100245772A CN 201110024577 A CN201110024577 A CN 201110024577A CN 102218428 A CN102218428 A CN 102218428A
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Abstract
The invention discloses a treatment method of arsenic slag. The method is characterized by comprises the following steps: (1) adding fly ash and water in the arsenic slag, and stirring for 0.25-1 hour; (2) adding a stabilizing agent in the mixture obtained from the step (2), and stirring for 0.25-1 hour; (3) adding a curing agent in the mixture obtained from the step (3), and stirring for 0.25-1 hour; and (4) curing the mixture obtained from the step (3) for 1-7 days. According to the invention, the leaching toxity of the arsenic slag can be reduced to the admission requirement of a dangerous and waste landfill site, also the fly ash can be treated to achieve the aim of treating waste by the use of waste; and the method provided by the invention has simple process, the material is easy to obtain, the treatment cost is low, and the method has a favorable application prospect.
Description
Technical field
The present invention relates to the improvement method of arsenic slag.
Background technology
Arsenic and compound serious harm human health thereof are defined as the 1st class carcinogenic substance by the Center for Disease Control and the international research institution that gives protection against cancer, mainly are detrimental to health by the drinking-water approach.Recent years, along with the exploitation energetically and the environmental protection supervision of mineral resources are not in place, serious arsenic poisoning incident has taken place in domestic a plurality of areas, has caused the special concern of governments at all levels.
In chemical industry, metallurgical production process, the normal sulphide precipitation that adopts is handled in the solution dearsenification, thereby produces the very high arsenic slag of arsenic content.Arsenic-containing waste adopts the method for hoarding storage to handle mostly for a long time, and as time passes, the high concentration arsenic-containing waste is cumulative.
Domestic minority enterprise with good conditionsi takes the recycling mode, and its technology mainly is divided into two classes: the one, and pyrogenic process is promptly used methods such as oxidizing roasting, reduction roasting and vacuum baking, directly obtains arsenic trioxide; Another kind is a wet method, promptly adopts salt to soak, alkali soaks or method such as acidleach, earlier arsenic is transferred in the solution, and then extracts, and is processed into arsenic trioxide.Pyrogenic process reclaims the arsenic slag and has technical maturity, short, the low cost and other advantages of flow process, but operating environment is poor, very easily causes secondary pollution, and product purity is low, and the arsenic rate of recovery is low.Hydrometallurgic recovery arsenic slag can satisfy environmental requirement, but technology is comparatively complicated, and cost recovery is higher.
At present, cement solidification technical finesse arsenic slag commonly used both at home and abroad, but because the cement addition is big, need making coatings to handle, causes the cost of disposal height, and handle the back increase-volume than big, be unfavorable for landfill.The organic polymer of employing curing technology is also arranged, though the catalyst amounts of adding seldom, the increase-volume of final products is littler than other solidification method, but processing safety is poor, the corrosion resistant of equipment is required height, firming body loss of properties on aging, the container disposal etc. of need packing into, and disposal costs also remains high.Stabilization technology is earlier the arsenic slag to be carried out preliminary treatment, with solution such as hot water or soda acids arsenic is leached, and then leachate is carried out stabilization processes.By in leachate, adding calcium salt, molysite deposition agent, generate relative indissoluble, more stable arsenate and arsenite under the natural conditions, can remove the arsenic in the liquid phase more after filtration.This treatment technology complex process, processing time are long, and can produce secondary pollution in processing procedure.
Summary of the invention
The objective of the invention is safe disposal arsenic slag, reduce the secondary pollution that produces to external world in the processing procedure, reduce cost of disposal.
Technical scheme of the present invention:
The improvement method of arsenic slag, its concrete steps are:
(1) in the arsenic slag, adds flying dust and water, stirred 0.25～1 hour;
(2) to the mixture of step (1) gained, add stabilizing agent, stirred 0.25～1 hour;
(3) to the mixture of step (2) gained, add curing agent, stirred 0.25～1 hour;
(4) to the mixture of step (3) gained, natural curing 1～7 day.
In step (1), the flying dust of adding is the flying dust that burning domestic garbage, hazardous waste or solid waste produce.
In step (2), the stabilizing agent of adding is one or several mixtures in iron oxide red, iron powder, iron filings, ferrous sulfate, magnesia, calcium carbonate, calcium oxide, the calcium hydroxide.
In the step (3), the curing agent of adding is one or more mixtures in cement, steel-making slag powder, the waterglass.
Comprise portland cement, Portland cement, portland slag cement, Portland pozzolana cement, Portland fly ash cement and composite Portland cement at cement.
Improvement method at the arsenic slag is characterized in that at cement, and model comprises 32.5,32.5R, 42.5,42.5R, 52.5,52.5R, 62.5,62.5R.
In steel-making slag powder, particle diameter is less than 0.335mm.
At waterglass, comprise KP1 and sodium silicate, modulus is 2～3.5, concentration is 10～80%.
Stabilizing agent can with the arsenic slag in contain arsenic ion generation chemical reaction and physical action, make it keep stable state, be insoluble in water.And curing agent also can with contain arsenic ion and react, play static stabilization, most importantly can wrap up the arsenic slag, stop to contain the arsenic ion stripping, and the firming body that forms makes things convenient for landfill.
Flying dust is the product of refuses such as burning domestic garbage, hazardous waste, solid waste.Flying dust often contains various heavy such as lead, cadmium, zinc, sometimes also with hypertoxic organic pollutions such as a certain amount of bioxin, furans.According to national hazardous waste register, incineration disposal residues such as flying dust belong to hazardous waste, need be cured processing and carry out security landfill again.
Compared with prior art, the present invention has following beneficial effect:
1. the arsenic slag after the present invention handles leaches that toxicity is low, long-time stability good, mechanical strength is high, can security landfill;
2. treatment process of the present invention is simple, workable, realizes suitability for industrialized production easily;
3. the present invention takes the method for waste recycling, has handled arsenic slag and flying dust simultaneously, has reduced the cost of disposal of arsenic slag effectively.
The specific embodiment:
The invention will be further described below in conjunction with embodiment.
Embodiment 1
Get a certain amount of arsenic slag, add flying dust and a certain amount of water of 4 times of arsenic slag amounts, stir 0.25h.Then, add the iron filings of arsenic slag amount 10% and 30% calcium carbonate, stir 0.25h.At last, add No. 42.5 Portland cements of 2 times of arsenic slag amounts, stir 0.5h.The mixture that stirs is covered with waterproof cloth, place at normal temperatures to do again in 3 days and leach the toxicity detection.Testing result shows, the leaching toxicity of arsenic is reduced to 0.53mg/L after the processing from original 361mg/L, reaches danger wastes landfill yard entry requirement.
Embodiment 2
Get a certain amount of arsenic slag, add flying dust and a certain amount of water of 6 times of arsenic slag amounts, stir 0.25h.Then, the iron oxide red of adding arsenic slag amount 10%, 5% ferrous sulfate and 10% magnesia stir 0.5h.At last, add No. 42.5 Portland cements of 1.5 times of arsenic slag amounts and 50% steel-making slag powder, stir 0.5h.The mixture that stirs is covered with waterproof cloth, place at normal temperatures to do again in 3 days and leach the toxicity detection.Testing result shows, the leaching toxicity of arsenic is reduced to 0.85mg/L after the processing from original 361mg/L, reaches danger wastes landfill yard entry requirement.
Embodiment 3
Get a certain amount of arsenic slag, add flying dust and a certain amount of water of 8 times of arsenic slag amounts, stir 0.25h.Then, the iron powder of adding arsenic slag amount 5%, 5% ferrous sulfate and 20% calcium carbonate stir 0.5h.At last, add No. 42.5 Portland cements of 2 times of arsenic slag amounts and 1 times steel-making slag powder, stir 0.5h.The mixture that stirs is covered with waterproof cloth, place at normal temperatures to do again in 3 days and leach the toxicity detection.Testing result shows, the leaching toxicity of arsenic is reduced to 0.35mg/L after the processing from original 361mg/L, reaches danger wastes landfill yard entry requirement.
Claims (8)
1. the improvement method of an arsenic slag, it is characterized in that: this method may further comprise the steps:
(1) addition is 2～9 times flying dust and water of arsenic slag amount in the arsenic slag, stirs 0.25～1 hour;
(2) to the mixture of step (1) gained, addition is the stabilizing agent of arsenic slag amount 5～50%, stirs 0.25～1 hour;
(3) to the mixture of step (2) gained, addition is the curing agent of 1～4 times of arsenic slag amount, stirs 0.25～1 hour;
(4) to the mixture of step (3) gained, natural curing 1～7 day.
2. the improvement method of a kind of arsenic slag according to claim 1 is characterized in that: in step (1), the flying dust of adding is the flying dust that burning domestic garbage, hazardous waste or solid waste produce.
3. the improvement method of a kind of arsenic slag according to claim 1 is characterized in that; In step (2), the stabilizing agent of adding is one or several mixtures in iron oxide red, iron powder, iron filings, ferrous sulfate, magnesia, calcium carbonate, calcium oxide, the calcium hydroxide.
4. the improvement method of a kind of arsenic slag according to claim 1 is characterized in that: in step (3), the curing agent of adding is one or more mixtures in cement, steel-making slag powder, the waterglass.
5. the improvement method of the described a kind of arsenic slag of claim 4, it is characterized in that: cement comprises portland cement, Portland cement, portland slag cement, Portland pozzolana cement, Portland fly ash cement and composite Portland cement.
6. the improvement method of the described a kind of arsenic slag of claim 5 is characterized in that: the cement model comprises 32.5,32.5R, 42.5,42.5R, 52.5,52.5R, 62.5,62.5R.
7. the improvement method of the described a kind of arsenic slag of claim 4, it is characterized in that: the steel-making slag powder particle diameter is less than 0.335mm.
8. the improvement method of the described a kind of arsenic slag of claim 4, it is characterized in that: waterglass comprises KP1 and sodium silicate, and modulus is 2～3.5, and concentration is 10～80%.
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| CN2011100245772A CN102218428A (en) | 2011-01-20 | 2011-01-20 | Treatment method of arsenic slag |
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| CN2011100245772A CN102218428A (en) | 2011-01-20 | 2011-01-20 | Treatment method of arsenic slag |
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| CN102603099A (en) * | 2012-03-30 | 2012-07-25 | 深圳市明灯科技有限公司 | Coupling process method for high-concentration arsenic acidic wastewater |
| CN103331289A (en) * | 2013-06-09 | 2013-10-02 | 中南大学 | Arsenic fixation method |
| CN103406333A (en) * | 2013-08-14 | 2013-11-27 | 路域生态工程有限公司 | Safe disposal method for high-concentration arsenic residue |
| CN104043645A (en) * | 2014-06-13 | 2014-09-17 | 中国科学院武汉岩土力学研究所 | Arsenic polluted soil reparation method |
| CN104263373A (en) * | 2014-08-28 | 2015-01-07 | 中国电建集团中南勘测设计研究院有限公司 | Stabilizing and curing agent for harmless treatment of high concentration arsenic ore slag and applications thereof |
| CN104289496A (en) * | 2014-09-19 | 2015-01-21 | 成都理工大学 | Method applied to treatment of vanadium-titanium slag |
| CN104556920A (en) * | 2014-11-27 | 2015-04-29 | 云南省环境科学研究院(中国昆明高原湖泊国际研究中心) | Arsenic-containing neutralization slag solidifying and stabilizing agent and method for solidifying and stabilizing arsenic-containing neutralization slag by using same |
| CN104607434A (en) * | 2015-02-10 | 2015-05-13 | 重庆大学 | Municipal solid waste incineration fly ash curing method |
| CN105312298A (en) * | 2015-12-11 | 2016-02-10 | 苏州华周胶带有限公司 | Green treatment method for stable solidification of waste |
| CN105537247A (en) * | 2016-01-27 | 2016-05-04 | 湖南有色金属研究院 | Method for curing arsenic-containing waste residues through industrial waste residues |
| CN105598154A (en) * | 2015-12-30 | 2016-05-25 | 北京高能时代环境技术股份有限公司 | Method for repairing soil polluted by arsenic |
| CN106178385A (en) * | 2016-09-26 | 2016-12-07 | 重庆大学 | In one way of life incineration of refuse flyash heavy metal fix, stabilization method |
| CN106362347A (en) * | 2016-08-04 | 2017-02-01 | 北京南科大蓝色科技有限公司 | Treating method for high-concentration arsenic slag |
| CN107188391A (en) * | 2017-07-25 | 2017-09-22 | 云南大地绿坤环保科技有限公司 | A kind of method that high concentration dreg containing arsenic stabilizes curing process |
| CN107486464A (en) * | 2017-09-26 | 2017-12-19 | 北京矿冶研究总院 | Disposal method of thallium-containing solid waste |
| CN108947420A (en) * | 2018-07-25 | 2018-12-07 | 郴州市金贵银业股份有限公司 | A kind of processing method of arsenic-containing waste residue |
| CN109226210A (en) * | 2018-11-05 | 2019-01-18 | 西安同鑫伟业环保科技有限公司 | A kind of stable curing method of arsenic-containing waste residue |
| CN109646861A (en) * | 2019-02-02 | 2019-04-19 | 常熟理工学院 | It is a kind of synchronous to realize flying ash removing toxic substances and the cured method of chromium slag reduction |
| CN109850978A (en) * | 2019-01-23 | 2019-06-07 | 昆明理工大学 | A kind of heavy nonferrous smelting sewage and sludge integral treatment method |
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| CN110227229A (en) * | 2019-07-24 | 2019-09-13 | 湖南科臣环境科技有限公司 | A kind of dearsenification slag stable composition chemical drug agent and its application |
| CN110293126A (en) * | 2019-05-27 | 2019-10-01 | 上海傲江生态环境科技有限公司 | One kind is for arsenic and antimony pollution soil remediation medicament and its application method |
| CN110560462A (en) * | 2019-09-29 | 2019-12-13 | 中南大学 | micro-embedding material containing arsenic waste residue, micro-embedding solidified body and preparation thereof |
| CN114160555A (en) * | 2021-11-25 | 2022-03-11 | 赛恩斯环保股份有限公司 | Wet mineralization and detoxification treatment method for arsenic sulfide slag |
| CN114920529A (en) * | 2022-05-31 | 2022-08-19 | 湖南现代环境科技股份有限公司 | Composite curing agent and treatment process of arsenic-containing waste residue |
| CN114956379A (en) * | 2022-05-30 | 2022-08-30 | 南京理工大学 | Method for realizing fixation of arsenic in liquid by utilizing fly ash to form safe landfill |
| CN115093168A (en) * | 2022-06-23 | 2022-09-23 | 昆明理工大学 | Method for fixing arsenic in tin tailings by using cement |
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| CN102603099A (en) * | 2012-03-30 | 2012-07-25 | 深圳市明灯科技有限公司 | Coupling process method for high-concentration arsenic acidic wastewater |
| CN103331289A (en) * | 2013-06-09 | 2013-10-02 | 中南大学 | Arsenic fixation method |
| CN103331289B (en) * | 2013-06-09 | 2015-04-08 | 中南大学 | Arsenic fixation method |
| CN103406333B (en) * | 2013-08-14 | 2015-08-26 | 路域生态工程有限公司 | A kind of Safe disposal method for high-concentration arsenic residue |
| CN103406333A (en) * | 2013-08-14 | 2013-11-27 | 路域生态工程有限公司 | Safe disposal method for high-concentration arsenic residue |
| CN104043645A (en) * | 2014-06-13 | 2014-09-17 | 中国科学院武汉岩土力学研究所 | Arsenic polluted soil reparation method |
| CN104263373A (en) * | 2014-08-28 | 2015-01-07 | 中国电建集团中南勘测设计研究院有限公司 | Stabilizing and curing agent for harmless treatment of high concentration arsenic ore slag and applications thereof |
| CN104289496A (en) * | 2014-09-19 | 2015-01-21 | 成都理工大学 | Method applied to treatment of vanadium-titanium slag |
| CN104556920A (en) * | 2014-11-27 | 2015-04-29 | 云南省环境科学研究院(中国昆明高原湖泊国际研究中心) | Arsenic-containing neutralization slag solidifying and stabilizing agent and method for solidifying and stabilizing arsenic-containing neutralization slag by using same |
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| CN105312298A (en) * | 2015-12-11 | 2016-02-10 | 苏州华周胶带有限公司 | Green treatment method for stable solidification of waste |
| CN105598154A (en) * | 2015-12-30 | 2016-05-25 | 北京高能时代环境技术股份有限公司 | Method for repairing soil polluted by arsenic |
| CN105598154B (en) * | 2015-12-30 | 2018-10-19 | 北京高能时代环境技术股份有限公司 | The method for repairing As polluted soil |
| CN105537247A (en) * | 2016-01-27 | 2016-05-04 | 湖南有色金属研究院 | Method for curing arsenic-containing waste residues through industrial waste residues |
| CN106362347A (en) * | 2016-08-04 | 2017-02-01 | 北京南科大蓝色科技有限公司 | Treating method for high-concentration arsenic slag |
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| CN108947420A (en) * | 2018-07-25 | 2018-12-07 | 郴州市金贵银业股份有限公司 | A kind of processing method of arsenic-containing waste residue |
| CN109226210A (en) * | 2018-11-05 | 2019-01-18 | 西安同鑫伟业环保科技有限公司 | A kind of stable curing method of arsenic-containing waste residue |
| CN109226210B (en) * | 2018-11-05 | 2021-08-31 | 西安同鑫伟业环保科技有限公司 | Stable solidification method of arsenic-containing waste residue |
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| CN110293126A (en) * | 2019-05-27 | 2019-10-01 | 上海傲江生态环境科技有限公司 | One kind is for arsenic and antimony pollution soil remediation medicament and its application method |
| CN110194602B (en) * | 2019-06-14 | 2020-04-24 | 中南大学 | Harmless treatment method for arsenic-iron slag |
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| CN110227229A (en) * | 2019-07-24 | 2019-09-13 | 湖南科臣环境科技有限公司 | A kind of dearsenification slag stable composition chemical drug agent and its application |
| CN110560462A (en) * | 2019-09-29 | 2019-12-13 | 中南大学 | micro-embedding material containing arsenic waste residue, micro-embedding solidified body and preparation thereof |
| CN110560462B (en) * | 2019-09-29 | 2021-10-15 | 中南大学 | Micro-embedding material containing arsenic waste residue, micro-embedding solidified body and preparation thereof |
| CN114160555A (en) * | 2021-11-25 | 2022-03-11 | 赛恩斯环保股份有限公司 | Wet mineralization and detoxification treatment method for arsenic sulfide slag |
| CN114160555B (en) * | 2021-11-25 | 2022-09-16 | 赛恩斯环保股份有限公司 | Wet mineralization and detoxification treatment method for arsenic sulfide slag |
| CN114956379A (en) * | 2022-05-30 | 2022-08-30 | 南京理工大学 | Method for realizing fixation of arsenic in liquid by utilizing fly ash to form safe landfill |
| CN114956379B (en) * | 2022-05-30 | 2023-08-22 | 南京理工大学 | Method for realizing arsenic fixation in liquid by utilizing fly ash to form safe landfill |
| CN114920529A (en) * | 2022-05-31 | 2022-08-19 | 湖南现代环境科技股份有限公司 | Composite curing agent and treatment process of arsenic-containing waste residue |
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Application publication date: 20111019 |