CN101054685A - Method of supplying nickel to electrolyte for preparing cathode nickel by infusible anode electrodeposition method - Google Patents
Method of supplying nickel to electrolyte for preparing cathode nickel by infusible anode electrodeposition method Download PDFInfo
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- CN101054685A CN101054685A CN 200710026656 CN200710026656A CN101054685A CN 101054685 A CN101054685 A CN 101054685A CN 200710026656 CN200710026656 CN 200710026656 CN 200710026656 A CN200710026656 A CN 200710026656A CN 101054685 A CN101054685 A CN 101054685A
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Abstract
The present invention discloses a process for supplying nickel to the electrolysing solution for preparing cathode nickel through an insoluble anode electrolytic process. Said method is characterized in that a high-purity globular shape nickel hydroxide is put into a solubilization tank; during the course for preparing nickel through an insoluble anode electrolytic process, with the continuous consumption of nickel ions and continuous increase of hydrogen ions, the electrolysing solution is driven for extracorporeal circulation of the electrolytic tank, and the high-purity globular shape nickel hydroxide is dissolved step by step to nickel ions and enter into the electrolysing solution through the solubilization tank storing high-purity globular shape nickel hydroxide therein, and then the electrolysing solution is returned back to the electrolytic tank for deposition of nickel. The present invention has simple and reliable process, few equipment investment, excellent process effects, and will not cause environment pollutions.
Description
Technical field
The present invention relates to a kind of method of replenishing nickel in preparing cathode nickel by infusible anode electrodeposition method electrolytic solution, particularly a kind of the employing added in the high pure spherical nickel hydroxide and free acid that electrowinning with insoluble anode nickel produces and the method for replenishing nickel ion simultaneously.
Background technology
Nickel is not only the base mateiral of making nickelalloy, especially the alloying element in other alloy (iron, copper, aluminium base etc. alloy).At present, nickel and alloy thereof are widely used in component, instrument manufacturing, machine manufacturing, the rocketry equipment of special purpose, in the reactor, also be applied to producing the fields such as corrosion protection electrolytic coating of Edison battery, porous filter, catalyzer and component and work piece simultaneously, nickel is regarded as the grand strategy material of the development of the national economy.
The soluble anode electrolytic process is mainly adopted in the production of metallic nickel at home and abroad, exactly thick nickel or nickelous sulfide is cast positive plate, and electrolysis in electrolyzer generates nickel ion at anode, and generates metallic nickel at negative electrode.
Anodic reaction: Ni-2e → Ni
2+Cathodic reaction: Ni
2+→ Ni+2e total reaction is zero.The main limitation of this method is that the raw material of preparation cathode nickel can only be thick nickel or nickelous sulfide, can not utilize the nickel of the ionic state of wet process generation to prepare cathode nickel.
The electrowinning with insoluble anode method is produced metallic nickel, and nickel ion exists in solution, under galvanic effect, and Ni
2+Generate metallic nickel and be deposited on the negative electrode obtaining electronics on the negative electrode; Anode is the aluminium silver alloys, in electrolytic deposition process middle-jiao yang, function of the spleen and stomach positive potential very, forms passivation on its surface and has stoped plumbous decomposition, H
2O is broken down into O on anode
2And H
+, O
2Directly emptying, H
+And SO
4 2-In conjunction with generating sulfuric acid, form anolyte.
Anodic reaction: 2H
2O-4e → O
2+ 4H
+Cathodic reaction: Ni
2+→ Ni+2e
At home, smeltery, Fukang, Xinjiang is the producer that present unique employing electrowinning with insoluble anode method is produced metallic nickel, and its technological process is: (form g/l:Ni 84.8, Co 0.0029, and Cu 0.0004, and Pb 0.0001, Na to obtain catholyte by mineral leaching and purification
2SO
4103.03, H
3BO
33.12), carry out electrodeposition with this catholyte, (Pb 0.0016, Na for composition g/l:Ni 55.6, Co 0.001 3, Cu 0.0004 to obtain anolyte after cathode nickel and acid accumulation and the nickel dilution
2SO
449.24, H
2SO
450).Smeltery, Fukang, Xinjiang turns back to secondary pulp burden process owing to need sulfuric acid to carry out the leaching of nickel minerals with this anolyte, consumes sulfuric acid and produces catholyte again.Like this, have 65% nickel to circulate on stream, the primary recovery of nickel has only 35%, and the nickel after a large amount of the purification reenters tediously long removal of impurities operation, will reduce the total recovery of the processing efficiency and the nickel of flow process.
The electrowinning with insoluble anode method that the domestic electrolytic nickel source mill that has adopts is produced cathode nickel, nickel sulfate solution is added in the additional employing of nickel ion after the dilution of anticathode liquid, the method that adds about NaOH adjustment pH value to 3 is then adopted in the processing of the anolyte after the acid accumulation, proceed electrodeposition.But so, Na in the electrolytic solution
2SO
4Concentration continue to increase, must carry out extracorporeal circulation and carry out removing of sodium sulfate.The method that removes is that about 70 ℃ electrolytic solution carries out freezingly during with electrodeposition, and sulfate crystal is separated out, and will certainly increase the production cost of nickel like this.Meanwhile, part of sulfuric acid nickel is separated out or is mingled with by sulfate crystal and separates out, and the nickel loss that causes is greater than 3%.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides the method for replenishing nickel in a kind of preparing cathode nickel by infusible anode electrodeposition method electrolytic solution, this method technology is simple, reliable, facility investment is few, technological effect good and can not cause environmental pollution, can not cause the loss of nickel simultaneously.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of method of in the electrolytic solution of preparing cathode nickel by infusible anode electrodeposition method, replenishing nickel, it is characterized in that this method is that the high pure spherical nickel hydroxide is placed in the dissolving tank, at nickel ion in the preparing cathode nickel by infusible anode electrodeposition method process constantly consume and the ever-increasing electrolytic solution of hydrogen ion in the cell body outer circulation, and the dissolving tank of high pure spherical nickel hydroxide arranged by storage, make the high pure spherical nickel hydroxide progressively be dissolved into nickel ion and enter in the electrolytic solution, again electrolytic solution is returned the electrodeposition that electrolyzer is proceeded nickel.
The high pure spherical nickel hydroxide that the present invention adopts can convert the nickel ion in the nickel sulfate solution to ball-shape nickel hydroxide by the complex-precipitation method, remove the anionic impurity that carries in sodium ion and the nickel sulfate solution by washing, drying is promptly made the high pure spherical nickel hydroxide.
The present invention is provided with filtering system in the exit of the dissolving tank of storing the high pure spherical nickel hydroxide, so that undissolved nickel hydroxide is trapped in the dissolving tank.
Since the high pure spherical nickel hydroxide in acid more diffluent pH value about 3, pH is higher than at 3 o'clock, the dissolving of high pure spherical nickel hydroxide needs the long period or heats, stirs, can make dissolving endpoint pH height to 4 to 4.5, therefore when circulation of elecrolyte flow through the cell body of storing the high pure spherical nickel hydroxide when nickel hydroxide is excessive, the terminal point acidity of dissolved hydrogen nickel oxide was easier to be controlled to be the pH value 3.0～3.3 of suitable electrodeposition.
The invention has the beneficial effects as follows: the present invention directly adds the high pure spherical nickel hydroxide in electrolytic solution, and utilizes electrolytic solution cumulative H in electrolytic deposition process
+Nickel hydroxide is dissolved, thereby both can solve sour cumulative problem in the electrolytic solution, can solve the problem of replenishing of the nickel ion in the electrolytic solution again, simultaneously because need not add in the sodium hydroxide and electrolytic solution in accumulation acid, thereby can exempt the operation that removes sodium sulfate in the traditional technology, thereby can prevent separating out of single nickel salt, to prevent the loss of nickel in the electrolytic solution; And method technology of the present invention is simple, reliable, facility investment is few, technological effect good and can not cause environmental pollution.
The present invention is further described below in conjunction with embodiment.
Embodiment
A kind of method of in the electrolytic solution of preparing cathode nickel by infusible anode electrodeposition method, replenishing nickel disclosed in this invention, be that the high pure spherical nickel hydroxide is placed in the dissolving tank, in the preparing cathode nickel by infusible anode electrodeposition method process, continuous consumption and hydrionic continuous increase along with nickel ion, make electrolytic solution in the cell body outer circulation, and the dissolving tank of high pure spherical nickel hydroxide arranged by storage, make the high pure spherical nickel hydroxide progressively be dissolved into nickel ion and enter in the electrolytic solution, the electrolytic solution that again nickel ion content is reached the electrodeposition requirement returns the electrodeposition that electrolyzer is proceeded nickel.
The high pure spherical nickel hydroxide that the present invention adopts can prepare by the complex-precipitation method, promptly in nickel sulfate solution, add sodium hydroxide, make the nickel ion in the single nickel salt convert ball-shape nickel hydroxide to, remove anionic impurities such as the chlorion that carries in sodium ion and the nickel sulfate solution and nitrate ion by washing, drying is promptly made the high pure spherical nickel hydroxide.
Store in the cell body of high pure spherical nickel hydroxide and have excessive ball-shape nickel hydroxide, and the exit of storing the dissolving tank of high pure spherical nickel hydroxide is provided with filtering system, so that undissolved nickel hydroxide is trapped in the dissolving tank.
Since the high pure spherical nickel hydroxide in acid more diffluent pH value about 3, pH is higher than at 3 o'clock, the dissolving of high pure spherical nickel hydroxide then needs the long period or heats, stirs, when the nickel hydroxide in the dissolving tank is heated, when stirring, the dissolving endpoint pH height to 4 that can make nickel hydroxide is to 4.5, therefore for guaranteeing that nickel hydroxide can dissolve rapidly, when circulation of elecrolyte flow through the cell body of storing the high pure spherical nickel hydroxide when nickel hydroxide is excessive, the terminal point acidity of dissolved hydrogen nickel oxide was easier to be controlled to be the pH value 3.0～3.3 of suitable electrodeposition.
Claims (4)
1. method of in the electrolytic solution of preparing cathode nickel by infusible anode electrodeposition method, replenishing nickel, it is characterized in that this method is that the high pure spherical nickel hydroxide is placed in the dissolving tank, will be in the preparing cathode nickel by infusible anode electrodeposition method process nickel ion constantly consume and the ever-increasing electrolytic solution of hydrogen ion in the cell body outer circulation, and the dissolving tank of high pure spherical nickel hydroxide arranged by storage, make the high pure spherical nickel hydroxide progressively be dissolved into nickel ion and enter in the electrolytic solution, again electrolytic solution is returned the electrodeposition that electrolyzer is proceeded nickel.
2. a kind of method of in the electrolytic solution of preparing cathode nickel by infusible anode electrodeposition method, replenishing nickel according to claim 1, it is characterized in that the high pure spherical nickel hydroxide is to convert the nickel ion in the nickel sulfate solution to ball-shape nickel hydroxide by the complex-precipitation method, remove the anionic impurity that carries in sodium ion and the nickel sulfate solution by washing, drying is promptly made the high pure spherical nickel hydroxide.
3. a kind of method of in the electrolytic solution of preparing cathode nickel by infusible anode electrodeposition method, replenishing nickel according to claim 1, the exit that it is characterized in that storing the dissolving tank of high pure spherical nickel hydroxide is provided with filtering system, so that undissolved nickel hydroxide is trapped in the dissolving tank.
4. a kind of method of replenishing nickel in the electrolytic solution of preparing cathode nickel by infusible anode electrodeposition method according to claim 1, the terminal point acidity that it is characterized in that the dissolved hydrogen nickel oxide is pH value 3.0～3.3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710026656 CN101054685A (en) | 2007-01-28 | 2007-01-28 | Method of supplying nickel to electrolyte for preparing cathode nickel by infusible anode electrodeposition method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710026656 CN101054685A (en) | 2007-01-28 | 2007-01-28 | Method of supplying nickel to electrolyte for preparing cathode nickel by infusible anode electrodeposition method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101054685A true CN101054685A (en) | 2007-10-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710026656 Pending CN101054685A (en) | 2007-01-28 | 2007-01-28 | Method of supplying nickel to electrolyte for preparing cathode nickel by infusible anode electrodeposition method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104140129A (en) * | 2014-07-30 | 2014-11-12 | 深圳市新昊青科技有限公司 | Separation and purification method of rough nickel hydroxide and obtained product thereof |
-
2007
- 2007-01-28 CN CN 200710026656 patent/CN101054685A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104140129A (en) * | 2014-07-30 | 2014-11-12 | 深圳市新昊青科技有限公司 | Separation and purification method of rough nickel hydroxide and obtained product thereof |
| CN104140129B (en) * | 2014-07-30 | 2016-05-25 | 深圳市新昊青科技有限公司 | Rough nickel hydroxide process for separation and purification and the product obtaining |
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Open date: 20071017 |