CN105948589B - A kind of method of electroplating sludge harmless treatment - Google Patents
A kind of method of electroplating sludge harmless treatment Download PDFInfo
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- CN105948589B CN105948589B CN201610320885.2A CN201610320885A CN105948589B CN 105948589 B CN105948589 B CN 105948589B CN 201610320885 A CN201610320885 A CN 201610320885A CN 105948589 B CN105948589 B CN 105948589B
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- 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
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Abstract
The invention belongs to environmental engineering technical fields, and in particular to a kind of method of electroplating sludge harmless treatment.Described method includes following steps：Electroplating sludge is taken, a certain amount of quick lime and desulfurated plaster is added, be fully crushed and is stirred evenly, a period of time is stood, obtains modified electroplating sludge；Modified electroplating sludge and flyash are taken, is stirred evenly, a certain amount of composite exciting agent is then added, mixture is obtained after being sufficiently stirred again；Electroplating sludge test block is made using extrusion forming mode, electroplating sludge test block is conserved 7~28 days under room temperature environment then, obtains electroplating sludge firming body.Electroplating sludge is handled using processing method of the present invention, have many advantages, such as that simple for process, at low cost, electroplating sludge solidification amount is big, increase-volume is small, the electroplating sludge firming body corrosion resistance obtained after handling simultaneously is by force, steady in a long-term, Leaching Heavy Metals are low and has certain compression strength, general solid waste can be used as to carry out landfill disposal.
Description
Technical field
The invention belongs to environmental engineering technical fields, and in particular to a kind of method of electroplating sludge harmless treatment.
Background technology
Electroplating sludge is the emission of generation during electroplating wastewater processing, wherein containing a large amount of chromium, cadmium, nickel, zinc etc.
Toxic heavy metal, ingredient are sufficiently complex.In China《National Hazard waste register》47 classes listed by (ring sends out [1998] No. 89)
In hazardous waste, electroplating sludge accounts for 7 major class therein, is a kind of typical hazardous waste.For the whole nation, annual output is about
10000000 tons of electroplating sludges.Currently, due to China's electroplating industry there are factory's points more, small scale, equipment is low and pollution control
Horizontal low problems, in quite a few area, electroplating sludge is still only simply handled, or even is arbitrarily stacked,
It has constituted a serious threat to environment.
By extensive market survey, it is found that the processing of electroplating sludge generally uses in some electroplating industry developed regions
The method filled after burning.Generally speaking, which can be greatly reduced the volume of electroplating sludge, while reduce electroplating sludge pair
The harm of environment.But since the method there are certain requirements burning facility and condition, this results in some areas at all can not be voluntarily
Burning disposal is carried out, has to be transported to conditional area on behalf of progress burning disposal, and processing will be further increased in this
Cost, and for general small plating producer, it is even more difficult to bear so high processing cost.Therefore, applicability is developed more
Extensively, the lower electroplating sludge innoxious process for treating of cost will be of far-reaching significance.
Solidification and stabilization technology is an important technology of harmless treatment electroplating sludge, for burning method, Gu
Change stabilization technology early investment is small, and operating cost is low, and technique is also relatively easy.Currently, usually used curing agent mainly has
Cement, lime, pitch, glass, HAS soil-solidified-agents etc., are mixed with electroplating sludge with this and are cured, heavy metal is made to seal
It closes in firming body to achieve the purpose that eliminate pollution.However, current curing technology is primarily present three aspect problems, it is first
First, firming body poor corrosion resistance still remains the high risk that heavy metal is leached, such as cement, lime solidification method；Secondly,
Increase-volume is apparent, as the dosage of cement solidification method, cement can reach tens times；Then, cure it is of high cost, it is complicated for operation, as pitch,
Glass solidification method.
Invention content
The present invention is in view of the deficiencies of the prior art, and it is an object of the present invention to provide a kind of method of electroplating sludge harmless treatment.
For achieving the above object, the technical solution adopted by the present invention is：
A kind of method of electroplating sludge harmless treatment, includes the following steps：
(1) electroplating sludge is modified：Electroplating sludge is taken, a certain amount of quick lime and desulfurated plaster is added, be fully crushed and is stirred
Uniformly, a period of time is stood, modified electroplating sludge is obtained；
(2) modified electroplating sludge and flyash are taken, is stirred evenly, a certain amount of composite exciting agent is then added, fills again
Mixture is obtained after dividing stirring；
(3) mixture obtained by step (2) is taken, electroplating sludge test block is made using extrusion forming mode, then will be electroplated dirty
Mud test block conserves 7~28 days under room temperature environment, obtains electroplating sludge firming body.
In said program, the addition of step (1) described quick lime is the 5%~10% of electroplating sludge quality, described de-
The addition of sulphur gypsum is the 5%~10% of electroplating sludge quality, and the time of the standing is not less than 24 hours, the modified electricity
The moisture content for plating sludge is 45wt%~60wt%.
In said program, the particle size range of step (2) described flyash is 38~150 μm, the modified electroplating sludge and
The mass ratio of flyash is 1.22~4.29:1.It is further preferable that the particle size range of flyash is 44~74 μm, modified plating is dirty
The mass ratio of mud and flyash is 1.54~3.49:1.
In said program, step (2) described composite exciting agent is technical grade solid state N a2SiO3, KOH powder and water mixing
Object, Na in composite exciting agent2SiO3A concentration of 1~8mol/L, a concentration of 1~6mol/L of KOH；The exciting agent and total object
The mass ratio of material is 0.1~0.35:1, total material is modified electroplating sludge and flyash.It is further preferable that complex excitation
Na in agent2SiO3A concentration of 3~6mol/L, a concentration of 1.5~4.5mol/L of KOH, the mass ratio of exciting agent and total material is
0.15~0.3:1.
Beneficial effects of the present invention：
(1) present invention carries out pretreatment modification to electroplating sludge first, reduces the aqueous of electroplating sludge to a certain extent
Rate and the content of organic matter, then the adding coal ash directly in modified electroplating sludge, it is poly- to form geology by the way of alkali-activated carbonatite
Close the three-dimensional, amorphous body of object, using the class of geo-polymer is zeolite structured and porosity characteristic, by the heavy metal in electroplating sludge from
Son " block " is in its three-dimensional network skeleton structure, to finally realize the innoxious of electroplating sludge；The heavy metal of electroplating sludge
Leaching is far below《Hazardous waste judging standard leaching characteristic identification》(GB5085.2-2007) related limit value.
(2) KOH and Na that the present invention passes through the appropriate strong basicity of incorporation2SiO3As exciting agent, and it is aided with extrusion forming side
The early strength of formula, electroplating sludge firming body is quickly grown, and without harsh curing condition, meets wanting substantially for industrialized production
It asks.
(3) electroplating sludge is handled using processing method of the present invention, with simple for process, at low cost, electroplating sludge is solid
The advantages that change amount is big, increase-volume is small, while the electroplating sludge firming body obtained after handling has corrosion resistance by force, steadily in the long term, again
Metal Leaching is low and has certain compression strength, general solid waste can be used as to carry out landfill disposal.
(4) present invention is applicable in model to the source of electroplating sludge, the content of heavy metal, the type of heavy metal without particular/special requirement
It encloses wide；Using 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 is controllable
Between 400~500 yuan, and up-front investment is small.
Description of the drawings
Fig. 1 is flow chart prepared by electroplating sludge firming body of the present invention.
Specific implementation mode
For a better understanding of the present invention, with reference to the embodiment content that the present invention is furture elucidated, but the present invention
Content is not limited solely to the following examples.
In following embodiment, the test method of correlated performance is as follows：
(1) compressive strength determination：By GB/T17671-1999《Test method for strength of hydraulic cement mortar (ISO methods)》Respectively to solid
Change body and carries out compression strength detection；
(2) Leaching：By HJ/T299-2007《Solid waste-Leaching leaching method-sulfonitric method》Respectively
The preparation of leachate is carried out to firming body, firming body Leaching is according to GB5085.3-2007《Hazardous waste judging standard leaches
Toxicity differentiates》Differentiated；
(3) pH is measured：According to GB/T 15555.12-1995《Solid waste determination of corrosion glass electrode method》It prepares each
The leachate of firming body, then according to GB 5085.1-2007《Hazardous waste judging standard-corrosivity differentiates》Firming body is soaked
The pH for going out liquid is judged.
In following embodiment, raw materials used chemical composition and relevant nature refer to Tables 1 and 2.
1 flyash chemical composition (unit of table：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
Each content of beary metal (unit of 2 electroplating sludge of table：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 " representative is not detected
Examples 1 to 4
A kind of method of electroplating sludge harmless treatment, includes the following steps：
(1) electroplating sludge pre-processes：Electroplating sludge is taken, 5% quick lime of electroplating sludge quality and 5% desulfurization stone is added
Cream is fully crushed and stirs evenly, and stands 24 hours, obtains modified electroplating sludge, the moisture content of the modified sewage sludge is 55%；
(2) it is 1.54~3.49 to take modified electroplating sludge and flyash (74 μm of grain size), the two mass ratio:1, stirring is equal
It is even, a certain amount of composite exciting agent, the quality of composite exciting agent and total material (modified electroplating sludge and flyash) is then added
Than being 0.15~0.25:1, Na in composite exciting agent2SiO3A concentration of 5mol/L, a concentration of 2.5mol/L of KOH fills again
Divide stirring, obtains mixture；
(3) mixture obtained by step (2) is taken, using extrusion forming mode, electroplating sludge test block is made, then test block exists
It is conserved 28 days under room temperature environment, obtains electroplating sludge firming body.
3 Examples 1 to 4 raw material proportioning of table and exciting agent dosage
The performance test results of electroplating sludge firming body made from Examples 1 to 4 are as shown in table 4 and table 5：
4 Examples 1 to 4 electroplating sludge firming body Leaching test result (mg/L) of table
| 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 " representative is not detected
5 Examples 1 to 4 compressive strength of solidified body of table and PH test results
| Embodiment | Compression 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 are well below GB5085.3-
2007《Hazardous waste judging standard leaching characteristic identification》Hazardous waste discriminant value；Four embodiment firming bodys as shown in Table 5
Compression strength in 8MPa or more, is required considerably beyond general landfill；In conjunction with the pH value and standard GB5085.1-2007 of table 5《Danger
Dangerous waste judging standard-corrosivity differentiates》It is found that the electroplating sludge firming body of four embodiments no longer has hazardous waste
Corrosive characteristics.
Obviously, above-described embodiment be only intended to clearly illustrate made by example, and not limitation to embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And the obvious variation or change therefore amplified
It moves within still in the protection domain of the invention.
Claims (7)
1. a kind of method of electroplating sludge harmless treatment, which is characterized in that include the following steps：
（1）Electroplating sludge is modified：Electroplating sludge is taken, a certain amount of quick lime and desulfurated plaster is added, be fully crushed and is stirred evenly,
A period of time is stood, modified electroplating sludge is obtained；The addition of the quick lime is the 5% ~ 10% of electroplating sludge quality, described de-
The addition of sulphur gypsum is the 5% ~ 10% of electroplating sludge quality, and the time of the standing is not less than 24 hours；
（2）Modified electroplating sludge and flyash are taken, is stirred evenly, a certain amount of composite exciting agent is then added, fully stirs again
Mixture is obtained after mixing；The composite exciting agent is technical grade solid state N a2SiO3, KOH powder and water mixture；The modification
The mass ratio of electroplating sludge and flyash is 1.22 ~ 4.29:1；The mass ratio of the exciting agent and total material is 0.1 ~ 0.35:1,
Total material is modified electroplating sludge and flyash；
（3）Take step（2）Gained mixture is made electroplating sludge test block using extrusion forming mode, then tries electroplating sludge
Block conserves 7 ~ 28 days under room temperature environment, obtains electroplating sludge firming body.
2. the method for electroplating sludge harmless treatment according to claim 1, which is characterized in that step（1）Gained is modified electricity
The moisture content for plating sludge is 45wt% ~ 60wt%.
3. the method for electroplating sludge harmless treatment according to claim 1, which is characterized in that step（2）The flyash
Particle size range be 38 ~ 150 μm.
4. the method for electroplating sludge harmless treatment according to claim 3, which is characterized in that the grain size model of the flyash
It is 44 ~ 74 μm to enclose, and the mass ratio of the modified electroplating sludge and flyash is 1.54 ~ 3.49:1.
5. the method for electroplating sludge harmless treatment according to claim 1, which is characterized in that step（2）Composite exciting agent
Middle Na2SiO3A concentration of 1 ~ 8mol/L, a concentration of 1 ~ 6mol/L of KOH.
6. the method for electroplating sludge harmless treatment according to claim 5, which is characterized in that in the composite exciting agent
Na2SiO3A concentration of 3 ~ 6mol/L, a concentration of 1.5 ~ 4.5mol/L of KOH.
7. the method for electroplating sludge harmless treatment according to claim 1, which is characterized in that the exciting agent and total material
Mass ratio be 0.15 ~ 0.3:1, total material is modified electroplating sludge and flyash.
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| 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 |
| CN107117843B (en) * | 2017-06-06 | 2019-04-16 | 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 |
| CN108264253B (en) * | 2018-01-17 | 2020-01-31 | 武汉理工大学 | preparation method of pervious concrete with heavy metal ion removing capacity |
| 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 |
| CN112408934B (en) * | 2020-11-24 | 2022-08-30 | 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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| CN101830681B (en) * | 2010-05-10 | 2012-07-25 | 广州绿由工业弃置废物回收处理有限公司 | Sintered light-weight environment-friendly brick produced from electroplating sludge and manufacture method thereof |
| CN102514079A (en) * | 2011-11-25 | 2012-06-27 | 盐城工学院 | Treatment method capable of achieving stabilization and curing of electroplating sludge |
| CN103274658B (en) * | 2013-01-14 | 2015-08-12 | 虞克夫 | The method of industrial residue, solid dangerous waste recycling |
| CN103833274B (en) * | 2013-12-31 | 2016-01-13 | 中国科学院武汉岩土力学研究所 | A kind of heavy metal contamination soil consolidator and using method thereof |
| CN105503097A (en) * | 2015-12-03 | 2016-04-20 | 长沙南方宇航环境工程有限公司 | Curing agent for treatment of electroplating sludge, and preparation method and application method thereof |
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