CN105948589A - Harmless treatment method for electroplating sludge - Google Patents

Harmless treatment method for electroplating sludge Download PDF

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Publication number
CN105948589A
CN105948589A CN201610320885.2A CN201610320885A CN105948589A CN 105948589 A CN105948589 A CN 105948589A CN 201610320885 A CN201610320885 A CN 201610320885A CN 105948589 A CN105948589 A CN 105948589A
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electroplating sludge
harmless treatment
modified
electroplating
flyash
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CN105948589B (en
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薛强
郑好
张峻清
李立
陈益人
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Safecleen Technologies Co Ltd
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Safecleen Technologies Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/006Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing mineral polymers, e.g. geopolymers of the Davidovits type
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B20/00Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/02Treatment
    • C04B20/023Chemical treatment
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00017Aspects relating to the protection of the environment
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00767Uses not provided for elsewhere in C04B2111/00 for waste stabilisation purposes
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Processing Of Solid Wastes (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Treatment Of Sludge (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Chemical & Material Sciences (AREA)

Abstract

The invention belongs to the technical filed of environmental protection engineering and particularly relates to a harmless treatment method for electroplating sludge. The harmless treatment method comprises the following steps: the electroplating sludge is taken, certain amount of quicklime and flue gas desulfurization gypsum is added, crushed sufficiently and stirred uniformly, the mixture is left to stand for a period of time, and modified electroplating sludge is obtained; the modified electroplating sludge and fly ash are taken and stirred uniformly, a certain amount of a composite activator is added and stirred sufficiently again, and a mixture is obtained; an electroplating sludge test block is obtained in a pressure forming manner and cured in a room-temperature environment for 7-28 days, and a solidified electroplating sludge body is obtained. The harmless treatment method adopted for treating the electroplating sludge has the advantages of simple process, low cost, large electroplating sludge curing amount, small capacity increase and the like, meanwhile, the solidified electroplating sludge body obtained after treatment is highly corrosion-resistant, stable for a long time and low in heavy metal leaching toxicity, has certain compressive strength and can be taken as general solid waste to be subjected to landfill treatment.

Description

A kind of method of electroplating sludge harmless treatment
Technical field
The invention belongs to environmental engineering technical field, a kind of method being specifically related to electroplating sludge harmless treatment.
Background technology
Electroplating sludge is the emission produced during electroplating wastewater processing, wherein contains substantial amounts of chromium, cadmium, nickel, zinc etc. poisonous Heavy metal, composition is sufficiently complex.Dangerous in 47 classes listed by China's " National Hazard refuse register " (environment-development [1998] 89) In refuse, electroplating sludge account for therein 7 big classes, is a kind of typical hazardous waste.For the whole nation, annual output about 1000 Ten thousand tons of electroplating sludges.At present, due to China's electroplating industry have that factory's point is many, small scale, equipment be low and pollution control level The problems such as low, in quite a few area, electroplating sludge is the most only by simply processing, and the most arbitrarily stacks, and it is right Environment constitutes a serious threat.
By market survey widely, find in some electroplating industry developed regions, after the process of electroplating sludge typically uses burning The method of landfill.Generally speaking, this method can be greatly reduced the volume of electroplating sludge, reduces electroplating sludge to environment simultaneously Harm.But owing to burning facility and condition be there are certain requirements by this method, this results in some areas and cannot burn voluntarily at all Process, have to be transported to area with good conditionsi on behalf of carrying out burning disposal, and this will be further increased processing cost, and right In general little plating producer, it is difficult to especially bear the highest processing cost.Therefore, the exploitation suitability is wider, cost more Low electroplating sludge innoxious process for treating is by of far-reaching significance.
Solidification and stabilization technology is an important technology of harmless treatment electroplating sludge, and for burning method, solidification is stable Change technology early investment is little, and operating cost is low, and technique is the most relatively easy.At present, normally used firming agent mainly have cement, Calx, Colophonium, glass, HAS soil-solidified-agent etc., mixed with electroplating sludge with this and solidified, make heavy metal close In firming body thus reach eliminate pollute purpose.But, current curing technology is primarily present three aspect problems, first, Firming body corrosion-resistant, it still also exists the excessive risk that heavy metal is leached, such as cement, Calx solidification method;Secondly, increase Holding substantially, such as cement solidification method, the consumption of cement can reach tens times;Then, solidification cost is high, operation complexity, as Colophonium, Glass solidification method.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, it is therefore intended that a kind of method that electroplating sludge harmless treatment is provided.
For achieving the above object, the technical solution used in the present invention is:
A kind of method of electroplating sludge harmless treatment, comprises the steps:
(1) electroplating sludge is modified: takes electroplating sludge, adds a certain amount of quick lime and desulfurated plaster, fully crushes and stirs all Even, stand a period of time, obtain modified electroplating sludge;
(2) take modified electroplating sludge and flyash, stir, be subsequently adding a certain amount of composite exciting agent, the most fully Compound is obtained after stirring;
(3) take step (2) gained compound, use extrusion forming mode to prepare electroplating sludge test block, then by electroplating sludge Test block maintenance 7~28 days under room temperature environment, obtain electroplating sludge firming body.
In such scheme, addition is electroplating sludge quality 5%~the 10% of step (1) described quick lime, described desulfurization stone The addition of cream is the 5%~10% of electroplating sludge quality, and the time of described standing is not less than 24 hours, described modified plating dirt The moisture content of mud is 45wt%~60wt%.
In such scheme, the particle size range of step (2) described flyash is 38~150 μm, described modified electroplating sludge and powder The mass ratio of coal ash is 1.22~4.29:1.It is further preferable that the particle size range of flyash is 44~74 μm, modified electroplating sludge It is 1.54~3.49:1 with the mass ratio of flyash.
In such scheme, step (2) described composite exciting agent is technical grade solid state N a2SiO3, KOH powder and the mixing of water Thing, Na in composite exciting agent2SiO3Concentration be 1~8mol/L, the concentration of KOH is 1~6mol/L;Described exciting agent is with total The mass ratio of material is 0.1~0.35:1, and described total material is modified electroplating sludge and flyash.It is further preferable that complex excitation Na in agent2SiO3Concentration be 3~6mol/L, the concentration of KOH is 1.5~4.5mol/L, and exciting agent with the mass ratio of total material is 0.15~0.3:1.
Beneficial effects of the present invention:
(1) first the present invention carries out pretreatment modification to electroplating sludge, reduce to a certain extent electroplating sludge moisture content and The content of organic matter, then direct adding coal ash in modified electroplating sludge, uses the mode of alkali-activated carbonatite to form geo-polymer three Dimension amorphous body, utilizes the class of geo-polymer zeolite structured and porosity characteristic, the heavy metal ion in electroplating sludge " is blocked " In its three-dimensional network framing structure, thus finally realize the innoxious of electroplating sludge;The Leaching Heavy Metals of electroplating sludge is remote Relevant limit value less than " hazardous waste judging standard leaching characteristic identification " (GB5085.2-2007).
(2) present invention is by mixing appropriate alkaline KOH and Na2SiO3As exciting agent, and it is aided with extrusion forming mode, The early strength of electroplating sludge firming body quickly grows, it is not necessary to harsh curing condition, meets the basic demand of industrialized production.
(3) use disposal methods electroplating sludge of the present invention, have that technique is simple, the solidification of low cost, electroplating sludge The advantages such as amount is big, increase-volume is little, the electroplating sludge firming body obtained after simultaneously processing has corrosion resistance by force, steadily in the long term, with much money Genus Leaching is low and has certain comprcssive strength, can carry out landfill disposal as general solid waste.
(4) present invention to the source of electroplating sludge, the content of heavy metal, heavy metal kind without particular/special requirement, the scope of application Extensively;Utilizing industrial waste (flyash) treatment of wastes with processes of wastes against one another, processing cost is low, and the integrated treatment cost of electroplating sludge per ton can control Between 400~500 yuan, and up-front investment is little.
Accompanying drawing explanation
Fig. 1 is flow chart prepared by electroplating sludge firming body of the present invention.
Detailed description of the invention
In order to be more fully understood that the present invention, it is further elucidated with present disclosure below in conjunction with embodiment, but present disclosure is not It is limited only to the following examples.
In following example, the method for testing of correlated performance is as follows:
(1) compressive strength determination: by GB/T17671-1999 " Test method for strength of hydraulic cement mortar (ISO method) " respectively to solidification Body carries out comprcssive strength detection;
(2) Leaching: by HJ/T299-2007 " solid waste-Leaching leaching method-sulfonitric method " respectively to solid Changing body and carry out the preparation of leachate, firming body Leaching is according to GB5085.3-2007 " hazardous waste judging standard Leaching Differentiate " differentiate;
(3) pH measures: prepare each solid according to GB/T 15555.12-1995 " solid waste determination of corrosion glass electrode method " Change the leachate of body, then according to GB 5085.1-2007 " hazardous waste judging standard-corrosivity differentiates ", firming body is leached The pH of liquid judges.
In following example, raw materials used chemical composition and relevant nature, refer to Tables 1 and 2.
Table 1 flyash chemical composition (unit: wt%)
Sample Al2O3 SiO2 Fe2O3 TiO2 K2O Na2O CaO MgO P2O5 LOI
Flyash 48.72 27.51 2.58 1.74 0.25 0.094 5.67 0.51 0.20 7.48
Note: " LOI " is loss on ignition
The each content of beary metal of table 2 electroplating sludge (unit: wt%)
Element Cu Zn Cd Pb Cr Hg Mn Ni As Fe
Content 3.22 1.95 N 0.04 2.54 N 0.17 0.77 N 4.99
Note: " N " represents and do not detect
Embodiment 1~4
A kind of method of electroplating sludge harmless treatment, comprises the steps:
(1) electroplating sludge pretreatment: take electroplating sludge, adds quick lime and the desulfurated plaster of 5% of electroplating sludge quality 5%, Fully crushing and stir, standing 24 hours, obtaining modified electroplating sludge, the moisture content of described modified sewage sludge is 55%;
(2) taking modified electroplating sludge and flyash (particle diameter 74 μm), both mass ratios are 1.54~3.49:1, stir, Being subsequently adding a certain amount of composite exciting agent, composite exciting agent with the mass ratio of total material (modified electroplating sludge and flyash) is 0.15~0.25:1, Na in composite exciting agent2SiO3The concentration that concentration is 5mol/L, KOH be 2.5mol/L, the most fully stir Mix, obtain compound;
(3) take step (2) gained compound, use extrusion forming mode, prepare electroplating sludge test block, then test block is existed Maintenance 28 days under room temperature environment, obtain electroplating sludge firming body.
Table 3 embodiment 1~4 proportioning raw materials and exciting agent consumption
The performance test results of the electroplating sludge firming body that embodiment 1~4 prepares is as shown in table 4 and table 5:
Table 4 embodiment 1~4 electroplating sludge firming body Leaching test result (mg/L)
Embodiment Cu Zn Cd Pb Cr Hg Mn Ni As Fe
1 2.08 2.16 N 0.72 0.53 N N 0.39 N 0.85
2 2.17 1.98 N 0.74 0.62 N N 0.62 N 0.17
3 2.34 2.27 N 0.88 0.57 N N 0.44 N 0.58
4 2.42 2.25 N 0.86 0.78 N N 0.75 N 0.93
Note: " N " represents and do not detect
Table 5 embodiment 1~4 firming body comprcssive strength and PH test result
Embodiment Comprcssive strength (MPa) pH
1 20.24 8.5
2 14.83 9.1
3 10.12 9.4
4 8.36 10.3
From table 4, it can be seen that each Leaching Heavy Metals of four embodiment firming bodys is all well below GB5085.3-2007 " danger Danger refuse judging standard leaching characteristic identification " hazardous waste discriminant value;The comprcssive strength of four embodiment firming bodys as shown in Table 5 All at more than 8MPa, considerably beyond typically filling requirement;PH value and standard GB5085.1-2007 in conjunction with table 5 are " dangerous useless Thing judging standard-corrosivity differentiates " understand, the electroplating sludge firming body of four embodiments the most no longer possesses the corrosion of hazardous waste Property feature.
Obviously, above-described embodiment is only by clearly demonstrating made example, and not restriction to embodiment.For institute For the those of ordinary skill in genus field, can also make other changes in different forms on the basis of the above description. Here without also cannot all of embodiment be given exhaustive.And the obvious change therefore amplified or variation still in Within the protection domain of the invention.

Claims (9)

1. the method for an electroplating sludge harmless treatment, it is characterised in that comprise the steps:
(1) electroplating sludge is modified: takes electroplating sludge, adds a certain amount of quick lime and desulfurated plaster, fully crushes and stirs, and stands a period of time, obtains modified electroplating sludge;
(2) take modified electroplating sludge and flyash, stir, be subsequently adding a certain amount of composite exciting agent, after being again sufficiently stirred for, obtain compound;
(3) take step (2) gained compound, use extrusion forming mode to prepare electroplating sludge test block, then by electroplating sludge test block maintenance 7 ~ 28 days under room temperature environment, obtain electroplating sludge firming body.
The method of electroplating sludge harmless treatment the most according to claim 1, it is characterized in that, addition is electroplating sludge quality the 5% ~ 10% of step (1) described quick lime, the addition of described desulfurated plaster is the 5% ~ 10% of electroplating sludge quality, and the time of described standing is not less than 24 hours.
The method of electroplating sludge harmless treatment the most according to claim 1, it is characterised in that the moisture content of step (1) gained modification electroplating sludge is 45wt% ~ 60wt%.
The most according to claim 1, the method for electroplating sludge harmless treatment, it is characterised in that the particle size range of step (2) described flyash is 38 ~ 150 μm, the mass ratio of described modified electroplating sludge and flyash is 1.22 ~ 4.29:1.
The most according to claim 4, the method for electroplating sludge harmless treatment, it is characterised in that the particle size range of described flyash is 44 ~ 74 μm, the mass ratio of described modified electroplating sludge and flyash is 1.54 ~ 3.49:1.
The method of electroplating sludge harmless treatment the most according to claim 1, it is characterised in that step (2) described composite exciting agent is technical grade solid state N a2SiO3, KOH powder and the mixture of water, Na in composite exciting agent2SiO3The concentration that concentration is 1 ~ 8mol/L, KOH be 1 ~ 6mol/L.
The method of electroplating sludge harmless treatment the most according to claim 6, it is characterised in that Na in described composite exciting agent2SiO3The concentration that concentration is 3 ~ 6mol/L, KOH be 1.5 ~ 4.5mol/L.
The most according to claim 1, the method for electroplating sludge harmless treatment, it is characterised in that described exciting agent is 0.1 ~ 0.35:1 with the mass ratio of total material, described total material is modified electroplating sludge and flyash.
The most according to claim 8, the method for electroplating sludge harmless treatment, it is characterised in that described exciting agent is 0.15 ~ 0.3:1 with the mass ratio of total material, described total material is modified electroplating sludge and flyash.
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Cited By (8)

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Publication number Priority date Publication date Assignee Title
CN106630712A (en) * 2016-11-29 2017-05-10 湖南埃格环保科技有限公司 Water-resistant building gypsum powder prepared from copper-containing sludge biological leaching residues and preparation method thereof
CN107117843A (en) * 2017-06-06 2017-09-01 浙江工业大学温州科学技术研究院 A kind of method that nature of glass solidifies electroplating sludge
CN107651892A (en) * 2017-09-18 2018-02-02 新中天环保股份有限公司 A kind of electroplating sludge cement solidification technique
CN107954659A (en) * 2017-11-30 2018-04-24 清远绿由环保科技有限公司 A kind of foamed light heat-preserving wall produced with electroplating sludge and its manufacture method
CN108264253A (en) * 2018-01-17 2018-07-10 武汉理工大学 A kind of preparation method of the pervious concrete with heavy metal ion Scavenging activity
CN110055412A (en) * 2019-04-28 2019-07-26 广东飞南资源利用股份有限公司 A kind of method of cupric tin electroplating sludge and desulfurized gesso of flue gas slag cooperative disposal and synthetical recovery copper and tin
CN111826522A (en) * 2020-06-24 2020-10-27 济源豫光有色冶金设计研究院有限公司 Method for treating electroplating sludge by adopting gypsum residues
CN112408934A (en) * 2020-11-24 2021-02-26 肇庆市武大环境技术研究院 Method for producing double-free brick by using Cr-containing electroplating sludge

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106630712A (en) * 2016-11-29 2017-05-10 湖南埃格环保科技有限公司 Water-resistant building gypsum powder prepared from copper-containing sludge biological leaching residues and preparation method thereof
CN106630712B (en) * 2016-11-29 2019-11-05 湖南埃格环保科技有限公司 A kind of water resistant building gypsum plaster and preparation method thereof using the preparation of copper-contained sludge Bioleaching slag
CN107117843A (en) * 2017-06-06 2017-09-01 浙江工业大学温州科学技术研究院 A kind of method that nature of glass solidifies electroplating sludge
CN107651892A (en) * 2017-09-18 2018-02-02 新中天环保股份有限公司 A kind of electroplating sludge cement solidification technique
CN107954659A (en) * 2017-11-30 2018-04-24 清远绿由环保科技有限公司 A kind of foamed light heat-preserving wall produced with electroplating sludge and its manufacture method
CN108264253A (en) * 2018-01-17 2018-07-10 武汉理工大学 A kind of preparation method of the pervious concrete with heavy metal ion Scavenging activity
CN110055412A (en) * 2019-04-28 2019-07-26 广东飞南资源利用股份有限公司 A kind of method of cupric tin electroplating sludge and desulfurized gesso of flue gas slag cooperative disposal and synthetical recovery copper and tin
CN111826522A (en) * 2020-06-24 2020-10-27 济源豫光有色冶金设计研究院有限公司 Method for treating electroplating sludge by adopting gypsum residues
CN112408934A (en) * 2020-11-24 2021-02-26 肇庆市武大环境技术研究院 Method for producing double-free brick by using Cr-containing electroplating sludge

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