CN106564969A - Method for deeply removing copper from nickel sulfate solution - Google Patents
Method for deeply removing copper from nickel sulfate solution Download PDFInfo
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- CN106564969A CN106564969A CN201610955390.7A CN201610955390A CN106564969A CN 106564969 A CN106564969 A CN 106564969A CN 201610955390 A CN201610955390 A CN 201610955390A CN 106564969 A CN106564969 A CN 106564969A
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- Prior art keywords
- nickel
- sulfate solution
- nickel sulfate
- copper
- copper removal
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G53/00—Compounds of nickel
- C01G53/10—Sulfates
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
The invention discloses a method for deeply removing copper from a nickel sulfate solution. The method includes the steps that the nickel sulfate solution containing copper is heated, wherein the heating temperature ranges from 40 DEG C to 80 DEG C; soluble rhodanide and a reducing agent are added to be stirred, wherein the reaction time ranges from 10 min to 4 h; and solid-liquid separation is carried out after the reaction is complete to remove copper. The method has the beneficial effects that the method is simple in operation, less in added reagent amount, wide in adaptable acidity scope, small in slag amount, stable in effect and the like, and the mass ratio of the copper to nickel in the slag is higher than 30.
Description
Technical field
The present invention relates to technical field of non-ferrous metallurgy, is more particularly to a kind of side of the deep copper removal from nickel sulfate solution
Method.
Background technology
Nickel is applied to stainless steel, battery material, hydrogen storage material, magnetic material, catalyst, shape memory alloy etc..Due to copper
The reasons such as nickel association, more or less contain a certain amount of copper in nickel minerals, copper enters solution during nickel dissolution.The reduction potential of copper is higher than
The reduction potential of nickel, copper is separated out simultaneously with nickel during electrolysis, and copper content is difficult to meet and requires in product, cathode nickel Quality Down.
The content of copper in order to reduce nickel, needs to carry out deep purifying copper removal to nickel electrolyte.So far, from nickel sulfate
Copper removal substantially uses the conventional thinking of sulfide precipitation copper removal in solution, the use of reagent is hydrogen sulfide, vulcanized sodium, sulfuration
Nickel, thiocarbonic acid nickel, manganese sulfide, active nickel sulfide, nano nickel sulphide etc..During using above-mentioned sulfiding reagent copper removal, even if sulfuric acid
Concentration<20g/L, also produces hydrogen sulfide, pollutes environment；As vulcanized sodium is difficult to control to local pH in above-mentioned sulfiding reagent, nickel in slag
Copper mass is than high；Nickel sulfide, active nickel sulfide presence are wrapped, and cupro-nickel mass ratio is low in same slag, general Cu:Ni<20:1；And
Manganese sulfide introduces manganese Metal ion；Nano nickel sulphide copper removal effect is good, but nano nickel sulphide filtration difficulty and oxidizable when preparing
It is difficult to ensure and deposits, high cost.In addition, the concentration of copper is often required that after industrialized copper removal in liquid<2.5mg/L；And prior art is very
Multi-method, some possibility are not reached at all, and what is had then reaches the problems such as afterwards again dis environment pollutes, and this also causes existing technical staff
Very it is worried.Therefore, it is badly in need of a kind of method that deep purifying copper removal is carried out to nickel electrolyte of exploitation.
The content of the invention
(1) technical problem to be solved
The technical problem to be solved in the present invention is how that depth removes the copper in nickel sulfate solution, while pollution is reduced,
Reduces cost, and a kind of method of the deep copper removal from nickel sulfate solution is provided.
(2) technical scheme
In order to solve above-mentioned technical problem, the invention provides a kind of method of the deep copper removal from nickel sulfate solution, should
Method includes step：The nickel sulfate solution of cupric is heated, heating-up temperature is 40 DEG C～80 DEG C, is subsequently adding soluble thiocyanation
Thing, reducing agent, stirring, the reaction time is 10min～4h, and separation of solid and liquid removes copper after reaction completely.
Preferably, described nickel sulfate solution be nickel sulfate solid is dissolved after the nickel sulfate solution, the initial gross separation that obtain
Nickel leachate or nickel sulfate electrolyte after cupro-nickel.
Preferably, in described nickel sulfate solution, the concentration of nickel is 10～100g/L, the concentration of copper be 0.01g/L～
4g/L。
Preferably, described soluble rhodanide is KSCN, NaSCN or NH4SCN.
Preferably, described reducing agent is sulphite, sulfur dioxide or stannous sulfate.
Preferably, described sulphite is sodium sulfite or potassium sulfite.
Preferably, sulfuric acid is added in the nickel sulfate solution of described cupric, sulfuric acid concentration is 0～200g/L.
Preferably, described mixing speed is 100rpm～600rpm.
Preferably, the soluble rhodanide and the mol ratio of the copper are 1:1～5:1.
Preferably, the reducing agent and the mol ratio of the copper are 1:1～10:1.If inventor has found to exceed by research
This scope copper can not be reduced to below 2.5mg/L, more than 5:SCN and Cu ion forming complex, return copper molten when 1, copper removal effect
Fruit reduces.
(3) beneficial effect
By the enforcement of the solution of the present invention, precipitation strainability is good, and the concentration range that the inventive method is suitable for nickel is wide,
Under the premise of ensureing that copper removal is required, substantially free of the loss of nickel.Leaching produced by the present invention cupro-nickel mass ratio in slag has can
Up to 45:1, few also can reach 30:1；And on this basis the solution of the present invention does not have during the course of the reaction to the acidity of sulfuric acid
Have extra high control to require, it is wide to adapt to Acidity Range, and the present invention adds amount of reagent few, simple to operate, reaction require it is low, no
Environmental pollution can be caused, in slag the advantages of cupro-nickel mass ratio height, the little quantity of slag, effect stability；Also it is particularly adapted to industrial operation
Requirement.
Specific embodiment
Embodiments of the present invention are described in further detail with reference to embodiment.Following examples are used to illustrate this
Invention, but can not be used for limiting the scope of the present invention.
Embodiment 1
Take nickel sulfate solution 1L, wherein the concentration of nickel be 70g/L, the concentration of copper be 0.5g/L, sulfuric acid be 10g/L, by it
It is heated to 80 DEG C.Under the stirring of 200rpm, KSCN1.5g is added, adds Na2SO3 2.5g, react 15min, filtered,
Copper is 1.8mg/L in filtrate, and cupro-nickel mass ratio is 30 in slag.
Embodiment 2
Take nickel sulfate solution 1L, wherein the concentration of nickel be 40g/L, the concentration of copper be 2g/L, sulfuric acid be 200g/L, by itself plus
Heat is to 60 DEG C.Under the stirring of 300rpm, the sulfur dioxide gas that mass fraction is 95% is passed through with the flow of 0.2L/min
Body 10min, stops ventilation, adds potassium rhodanate 3g, reacts 30min, filters, and copper is 2.0mg/L in filtrate, cupro-nickel matter in slag
Amount is than being 45.
Embodiment 3
Take nickel sulfate solution 1L, wherein the concentration of nickel be 40g/L, the concentration of copper be 0.1g/L, sulfuric acid concentration be 50g/L,
It is heated to 50 DEG C.Under the stirring of 100rpm, potassium rhodanate 0.4g is added, add stannous sulfate 0.3g, reaction
20min, filters, and copper is 1.5mg/L in filtrate, and cupro-nickel mass ratio is 40 in slag.
Embodiment of above is merely to illustrate the present invention, rather than limitation of the present invention.Although with reference to embodiment to this
It is bright to be described in detail, it will be understood by those within the art that, technical scheme is carried out various combinations,
Modification or equivalent, without departure from the spirit and scope of technical solution of the present invention, all should cover will in right of the invention
Ask in the middle of scope.
Claims (10)
1. a kind of method of the deep copper removal from nickel sulfate solution, it is characterised in that the method comprising the steps of：By the sulfuric acid of cupric
Nickel solution is heated, and heating-up temperature is 40 DEG C～80 DEG C, is subsequently adding soluble rhodanide, reducing agent, stirring, and the reaction time is
10min～4h, separation of solid and liquid removes copper after reaction completely.
2. the method for the deep copper removal from nickel sulfate solution according to claim 1, it is characterised in that described nickel sulfate
Solution be nickel sulfate solid is dissolved after nickel leachate after the nickel sulfate solution, the initial gross separation cupro-nickel that obtain or sulfuric acid nickel electrowinning
Liquid.
3. the method for the deep copper removal from nickel sulfate solution according to claim 1, it is characterised in that in described sulfuric acid
In nickel solution, the concentration of nickel is 10～100g/L, and the concentration of copper is 0.01g/L～4g/L.
4. the method for the deep copper removal from nickel sulfate solution according to claim 1, it is characterised in that described solubility
Rhodanide is KSCN, NaSCN or NH4SCN。
5. the method for the deep copper removal from nickel sulfate solution according to claim 1, it is characterised in that described reducing agent
For sulphite, sulfur dioxide or stannous sulfate.
6. the method for the deep copper removal from nickel sulfate solution according to claim 5, it is characterised in that described sulfurous acid
Salt is sodium sulfite or potassium sulfite.
7. the method for the deep copper removal from nickel sulfate solution according to claim 1, it is characterised in that in described cupric
Nickel sulfate solution in add sulfuric acid, sulfuric acid concentration is 0～200g/L.
8. the method for the deep copper removal from nickel sulfate solution according to claim 1, it is characterised in that described stirring speed
Spend for 100rpm～600rpm.
9. the method for the deep copper removal from nickel sulfate solution according to claim 1, it is characterised in that the soluble sulphur
Cyanide is 1 with the mol ratio of the copper:1～5:1.
10. the method for deep copper removal from nickel sulfate solution according to any one of claim 1-9, it is characterised in that institute
It is 1 that reducing agent is stated with the mol ratio of the copper:1～10:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610955390.7A CN106564969A (en) | 2016-10-27 | 2016-10-27 | Method for deeply removing copper from nickel sulfate solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610955390.7A CN106564969A (en) | 2016-10-27 | 2016-10-27 | Method for deeply removing copper from nickel sulfate solution |
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| Publication Number | Publication Date |
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| CN106564969A true CN106564969A (en) | 2017-04-19 |
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| CN201610955390.7A Pending CN106564969A (en) | 2016-10-27 | 2016-10-27 | Method for deeply removing copper from nickel sulfate solution |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102206759A (en) * | 2010-03-30 | 2011-10-05 | 威海恒邦化工有限公司 | Decyanation method and apparatus of cyanogen-containing tailings |
| CN102225798A (en) * | 2011-03-31 | 2011-10-26 | 北京化工大学 | Comprehensive utilization method of desulfurization waste liquid |
| CN102983340A (en) * | 2012-11-21 | 2013-03-20 | 中国科学院金属研究所 | Method for removing copper ions from copper-containing vanadium liquid |
| CN104195338A (en) * | 2014-08-20 | 2014-12-10 | 山东国大黄金股份有限公司 | Method for recovering copper and zinc from demetallized cyanide-containing barren liquor |
-
2016
- 2016-10-27 CN CN201610955390.7A patent/CN106564969A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102206759A (en) * | 2010-03-30 | 2011-10-05 | 威海恒邦化工有限公司 | Decyanation method and apparatus of cyanogen-containing tailings |
| CN102225798A (en) * | 2011-03-31 | 2011-10-26 | 北京化工大学 | Comprehensive utilization method of desulfurization waste liquid |
| CN102983340A (en) * | 2012-11-21 | 2013-03-20 | 中国科学院金属研究所 | Method for removing copper ions from copper-containing vanadium liquid |
| CN104195338A (en) * | 2014-08-20 | 2014-12-10 | 山东国大黄金股份有限公司 | Method for recovering copper and zinc from demetallized cyanide-containing barren liquor |
Non-Patent Citations (1)
| Title |
|---|
| 中国选矿技术网: "铜的分离方法", 《中国选矿技术网》 * |
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Application publication date: 20170419 |
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