CN1170780A - Method and apparatus for electrolytic extraction and refining - Google Patents
Method and apparatus for electrolytic extraction and refining Download PDFInfo
- Publication number
- CN1170780A CN1170780A CN 96110726 CN96110726A CN1170780A CN 1170780 A CN1170780 A CN 1170780A CN 96110726 CN96110726 CN 96110726 CN 96110726 A CN96110726 A CN 96110726A CN 1170780 A CN1170780 A CN 1170780A
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- China
- Prior art keywords
- brush
- anode
- bristle
- electrowinning
- negative electrode
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Electrolytic Production Of Metals (AREA)
Abstract
Between the cathode and anode is installed a brush allowing electrolyte to pass through with the bristles being made to near or contact to the surface of cathode. Through the reciprocation or vobration of the brush in the direction parallel to electrode surface, the diffusion layer on the cathode surface is eliminated basically. During electrolytic refining, the bristles are also made to contact with the anode surface to eliminate the diffusion layer on the anode surface. In this way, the present invention can increase working current density, reduce power consumption, prevent producing spongy deposition and dendrite and prevent anode deactivation during eletrolytic refining.
Description
What the present invention relates to is a kind of electrowinning, purified new process and specific equipment.In electrowinning, refinery practice process, electrode surface diffusion layer often produces many negative influences, as has limited working current density (thereby having limited throughput), has increased current consumption.In addition, the cathode surface diffusion layer often causes the spongy settled layer that loosens and produces dendrite, and the anode surface diffusion layer can cause anode passivation (during electrorefining).Thereby reduce electrode surface diffusion layer thickness, and to improving working current density, reduce power consumption, it is all significant to ensure safety in production.
In the prior art, mainly rely on the mode of natural convection to improve mass transfer process.But in the mode of this natural convection, electrode surface diffusion layer is very thick.In view of the singularity and the complicacy of electrowinning, refining operation, make common in order to the forced convection measure that reduces electrode surface diffusion layer thickness (as electrode move, Rapid Cycle liquid stream etc.) can't adopt.Though also adopt circulation of elecrolyte to flow in the production, its flow velocity is too low, produce any effect hardly to reducing electrode surface diffusion layer thickness.For example, the calculating of electrolytic copper refining is shown, when having only the speed of forced convection to be far longer than 3cm/s, could obviously reduce electrode surface diffusion layer thickness.But only can reach the following flow velocity of 0.3cm/s (see that Chen Yanxi writes " electrolytic engineering ", p.333, Tianjin science tech publishing house, 1993) in producing
Purpose of the present invention promptly is at electrowinning, refining the above-mentioned problems in the prior art, proposes the effective ways of a kind of attenuate that is easy to implement in electrolytic process (even basically eliminate) electrode surface diffusion layer.
Technical scheme of the present invention is: the brush that allows electrolytic solution to pass through is set between negative electrode and anode, bristle contacts with electrode surface or near (during electrowinning bristle only contact with cathode surface or approaching), brush is reciprocating on the direction parallel with electrode surface, or small amplitude motion.With the basically eliminate electrode surface diffusion layer.
Brush of the present invention is made of bristle and the substrate that is used for the set bristle.The substrate of brush constitutes the structure that allows electrolytic solution to pass through, and constitutes grid-like, aperture plate shape or hole pattern shape etc. as substrate, perhaps includes the structure that allows electrolytic solution to pass through.
The profile of brush of the present invention (the determined geometrical shape of bristle tip) is plane, or the shape that is behind the cutouts from the plane,, flush type graniphyric grid-like as flush type.
Among the present invention, owing to utilize brush that external impetus directly is passed near the ammeter face, thereby can eliminate electrode surface diffusion layer easily or its thickness is significantly reduced.Can bring the effect of series of active thus,, prevent the appearance of spongy deposition and dendrite, reduce solution loss, reduce the concentration polarization overpotential as improving working current density, or the like.
Embodiment
In the operation of electrowinning zinc, grid-like brush is set between negative electrode and the anode, bristle only contacts with cathode surface.All brushes are fixed on the same connecting rod in the groove, and connecting rod moves up and down, and drive all brushes and move up and down.But basically eliminate cathode surface diffusion layer improves working current density, reduces power consumption, prevents the spongy heavy appearance that reaches dendrite.
Claims (4)
1. one kind relates to electrowinning, purified new process, promptly make the metal ion to be extracted in the electrolytic solution become metal simple-substance, and make metal target optionally dissolve and optionally deposit to purify metals at negative electrode at anode with electrolytic process in cathodic reduction with electrolytic process.It is characterized in that the brush that allows electrolytic solution to pass through is set between negative electrode and anode, bristle contacts with electrode surface or is approaching, and brush moves on the direction parallel with electrode surface.
2. the method for claim 1, the electrode that it is alleged refers to negative electrode when electrowinning, refer to negative electrode and anode when electrorefining.
3. a brush that is used for electrowinning, novel process for refining method is made of bristle and the substrate that is used for the set bristle.The substrate that it is characterized in that brush constitutes the structure that (or comprising) allows electrolytic solution to pass through.
4. brush as claimed in claim 3 is characterized in that the substrate of brush constitutes grid-like or hole pattern shape; The profile of brush (the determined geometrical shape of bristle tip) is plane, or the shape that is behind the cutouts from the plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96110726 CN1170780A (en) | 1996-07-11 | 1996-07-11 | Method and apparatus for electrolytic extraction and refining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96110726 CN1170780A (en) | 1996-07-11 | 1996-07-11 | Method and apparatus for electrolytic extraction and refining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1170780A true CN1170780A (en) | 1998-01-21 |
Family
ID=5120903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96110726 Pending CN1170780A (en) | 1996-07-11 | 1996-07-11 | Method and apparatus for electrolytic extraction and refining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1170780A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105189825A (en) * | 2013-04-04 | 2015-12-23 | 德诺拉工业有限公司 | Electrolytic cell for metal electrowinning |
-
1996
- 1996-07-11 CN CN 96110726 patent/CN1170780A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105189825A (en) * | 2013-04-04 | 2015-12-23 | 德诺拉工业有限公司 | Electrolytic cell for metal electrowinning |
| CN105189825B (en) * | 2013-04-04 | 2017-12-01 | 德诺拉工业有限公司 | Electrolytic cell for electrolytic etching of metal extraction |
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Addressee: Ke Guoping Document name: payment instructions |
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| C57 | Notification of unclear or unknown address | ||
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Addressee: Ke Guoping Document name: Deemed as a notice of withdrawal |