CN109896597A - The technique of electrolysis method processing nickel cobalt sewage - Google Patents
The technique of electrolysis method processing nickel cobalt sewage Download PDFInfo
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- CN109896597A CN109896597A CN201711310194.5A CN201711310194A CN109896597A CN 109896597 A CN109896597 A CN 109896597A CN 201711310194 A CN201711310194 A CN 201711310194A CN 109896597 A CN109896597 A CN 109896597A
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- sewage
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Abstract
The invention discloses a kind of electrolysis method processing nickel cobalt sewage equipment processing sewage technique be, (1) sewage is pumped into electrolytic cell with 0.05-0.08m3/min flow from the wastewater inlet of electrolytic cell, voltage is 2.6-3.0V between electrolytic cell anode plate and cathode plate, current density is adjusted to 60-120A/ ㎡, is electrolysed 30-50min.(2) tank liquor after the completion of being electrolysed is filtered, and collects filter residue.
Description
Technical field
The present invention relates to hydrometallurgy industry sewage process fields, and in particular to a kind of work of electrolysis method processing nickel cobalt sewage
Skill.
Background technique
In hydrometallurgy industry especially nickel cobalt metal material is smelted, inevitably using organic extractant come rich
Collect the nickel cobalt metal ion in aqueous solution, and the extraction raffinate after being extracted then becomes waste water again without utility value, these industry are dirty
Not only pH value is low for water, is rich in sodium chloride, magnesium sulfate and nickel, cobalt inorganic salts, while also entrainment has an impact water-quality COD and total phosphorus
Organic extractant.For the processing of such sewage, conventional purge processing mode such as vulcanizes coagulation, resin adsorption, aeration, biochemical method
Deng or with process it is cumbersome, operation is difficult to control, processing cost is excessively high, effect is poor, easy formation secondary pollution problems are difficult to take
Obtain satisfactory effect.
Summary of the invention
It is lacked to solve, effect difference high to cost of sewage disposal in hydrometallurgy industry and secondary pollution etc. in the prior art
It falls into, the purpose of the present invention is to provide a kind of techniques of electrolysis method processing nickel cobalt sewage.
(1) sewage is pumped into electrolytic cell with 0.05-0.08m3/min flow from the wastewater inlet of electrolytic cell, electrolytic cell sun
Voltage is set to 2.6-3.0V between pole plate and cathode plate, and current density is adjusted to 60-120A/ ㎡, is electrolysed 30-50min.
(2) tank liquor after the completion of being electrolysed is filtered, and collects filter residue.
Technique has following advantages:
1. sour water is adjusted to neutrality: ionization and yin in the tank voltage and current density range of setting, using hydrone
Extremely existing reaction: H2O ↔ OH-+H+、2H++2e=H2 The hydrogen ion for generating the part hydrogen ion to dissociate in raw water and ionization
Hydrogen evolution is resolved in cathode, superfluous hydroxide ion then recombines generation hydrone with hydrogen ion remaining in raw water
So that the sour water that pH value is 4.0 or so passes through electrolysis analysis Natural regulation to neutral range.
2. the separation and recycling of nickel, cobalt metal cation: there is also R simultaneously for cathode plate face during being electrolysed analysis2++
The reaction process of 2e=R, there is also R in anode plate area2+-e+3OH- =R(OH)、R(OH)3 -H2Reaction (R generation herein of O=ROOH
Table nickel, cobalt element)；By the reaction equation of nickel cobalt metal ion two interpolars in electrolytic cell, nickel cobalt ion can respectively from
It is deposited and is precipitated with different states in the aqueous solution of yin, yang plate regions.Hereafter the tank liquor of discharge is filtered again, nickel cobalt is not
It is only recycled, water body is also purified simultaneously.
3. reducing the COD value for influencing water quality, organic phosphorus and chloride ion content: in anode plate area in addition to above electrochemistry
Reaction is outer, and there is also Cl---e =Cl、Cl+Cl=Cl2This process, i.e., part chloride ion in water body anode first by
Be reduced into chlorine atom, then chlorine atom is combined into chlorine again, and chlorine atom, chlorine and chlorine generated with water molecule reaction it is micro-
Amount hypochlorous acid has extremely strong oxidisability again, is allowed to microorganism, part Organic oxidation and the decomposition in water body to form dioxy
Change carbon, water, phosphate of inorganic indissoluble etc., so that direct or indirect reduces COD value in water, organic phosphorus and chloride ion.
4. suspension greasy dirt particle aggregation: sewage to be processed generates on yin, yang pole plate after filling electrolytic cell and being powered
Fine hydrogen, chlorine bubbles greasy dirt particle supporting can be got up, formed and be easy to the oil lamella of collecting.
To sum up, a kind of equipment of electrolysis method processing hydrometallurgy industry nickel cobalt sewage and sewage nickel cobalt after process are dense
Degree be smaller than 0.5mg/L, pH value rise to 6.0~7.6, COD value can be down to 200mg/L hereinafter, it is organic phosphorus be down to 3mg/L with
Under, oil content is also reduced to 10mg/L or less simultaneously in water；The nickel cobalt slag of recycling is with impurity is low, content is high, quality is good.
Specific embodiment
The electrolytic cell handle sewage technique the following steps are included:
(1) by sewage collecting into liquid storage tank, and each pollutant load of sample detection；
(2) sewage in liquid storage tank is pumped into electrolytic cell according to the flow velocity of 0.05~0.08m3/min, in the slot of 2.6~3.0V
Electrolysis 30-50min is carried out under the current density of voltage and 60~120A/ ㎡, the raffinate after electrolysis is discharged and adds through outlet of sewer
With filtering, filter residue is that nickel cobalt slag is recycled again, and filtrate is purified sewage.
Embodiment 1
Ni 52.6mg/L, Co 14.3mg/L, PH 3.85, COD 426.4mg/L, the organic 5.7mg/L of P, oil content will be contained
The sewage of 21.7mg/L is pumped into electrolytic cell with the flow velocity of 0.06m3/min, sets tank voltage 2.9V, adjusts current density
108.52 A/ ㎡, be electrolysed 30min, electrolytic liquid through filtering detect, measure Ni:0.25mg/L, Co:0.20mg/L in filtrate,
Oil content 7.3mg/L in the organic 1.9mg/L of PH7.37, COD106.5mg/L, P, water.
Embodiment 2
Ni 90.4mg/L, Co 19.5mg/L, PH 3.62, COD 956.4mg/L, the organic 11.9mg/L of P, oil content will be contained
The sewage of 43.3mg/L is pumped into electrolytic cell with the flow velocity of 0.08m3/min, sets tank voltage 2.6V, adjusts current density 60.34
A/ ㎡, be electrolysed 35min, electrolytic liquid through filtering detect, measure Ni:0.46mg/L, Co:0.34mg/L in filtrate, PH6.75,
Oil content 9.4mg/L in the organic 2.8mg/L of COD195.2mg/L, P, water.
Claims (1)
1. a kind of technique of the equipment processing sewage of electrolysis method processing nickel cobalt sewage is,
Sewage is pumped into electrolytic cell with 0.05-0.08m3/min flow from the wastewater inlet of electrolytic cell, electrolytic cell anode plate with
Voltage is 2.6-3.0V between cathode plate, and current density is adjusted to 60-120A/ ㎡, is electrolysed 30-50min, the tank liquor after the completion of being electrolysed
It is filtered, collects filter residue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711310194.5A CN109896597A (en) | 2017-12-11 | 2017-12-11 | The technique of electrolysis method processing nickel cobalt sewage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711310194.5A CN109896597A (en) | 2017-12-11 | 2017-12-11 | The technique of electrolysis method processing nickel cobalt sewage |
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| Publication Number | Publication Date |
|---|---|
| CN109896597A true CN109896597A (en) | 2019-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711310194.5A Pending CN109896597A (en) | 2017-12-11 | 2017-12-11 | The technique of electrolysis method processing nickel cobalt sewage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110257639A (en) * | 2019-07-23 | 2019-09-20 | 湖南金雕能源科技有限公司 | A method of extracting cobalt, nickel in tungsten carbide cleaning solution |
-
2017
- 2017-12-11 CN CN201711310194.5A patent/CN109896597A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110257639A (en) * | 2019-07-23 | 2019-09-20 | 湖南金雕能源科技有限公司 | A method of extracting cobalt, nickel in tungsten carbide cleaning solution |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190618 |
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| WD01 | Invention patent application deemed withdrawn after publication |