CN1173076C - Process for purifying gold by use of controllable pulse and auxiliary electrode - Google Patents
Process for purifying gold by use of controllable pulse and auxiliary electrode Download PDFInfo
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- CN1173076C CN1173076C CNB011052252A CN01105225A CN1173076C CN 1173076 C CN1173076 C CN 1173076C CN B011052252 A CNB011052252 A CN B011052252A CN 01105225 A CN01105225 A CN 01105225A CN 1173076 C CN1173076 C CN 1173076C
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- electrode
- gold
- power supply
- auxiliary electrode
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Abstract
The present invention relates to a method for purifying gold by using a controllable pulse and an auxiliary electrode. An auxiliary electrode is arranged between a negative electrode of a power supply and a cathode, wherein the auxiliary electrode is connected in parallel with the cathode. A casing is composed of a non-metal material, and the inner side is provided with a conducting body; a gap between each two molecules of the casing is smaller than the diameter of a gold ion, so the gold ion in an electrolyte can not be reduced at the surface of the auxiliary electrode. Additional gold ions dissolved by an anode are added to the surface of the cathode, and thus, the gold with high purification can be obtained at the cathode under the conditions of low concentration of an electrolyte, large negative current and anode current and short purification period.
Description
The present invention relates to a kind of refining method of gold, particularly a kind of process for purifying gold that uses controllable pulse and auxiliary electrode.
In the prior art, purify " four or nine " that utilize electrolytic process to carry out gold, be to adopt sine wave period commutation electrolysis process, utilize sinusoidal wave forward current at cathode deposition gold, utilize sinusoidal wave reversible circulation to be partly dissolved at the gold of cathodic deposition with former, thereby in electrolytic process, keep the balance of cathode surface layer gold ion concentration, to reach the purpose that gold " four or nine " is purified.But exist following problem in the prior art: liquid making is big with the gold amount; Electrolysing period is long; Electrochemical process is restive, causes the less stable of percentage of gold; The transformer noise height, energy consumption is big.
The object of the present invention is to provide a kind of method of gold refining, this method can overcome the above-mentioned shortcoming in the prior art.In the electrochemical process of this method, can directly control the gold concentration of cathode surface, thereby control percentage of gold intuitively, reach and reduce liquid making significantly with gold, improve working current, shorten electrolysing period, the purpose that reduces cost.
The present invention is achieved in that in the electrolyzer that uses the electrolytic process purifying gold, add an extra supporting electrode, non-metallic material are adopted on the surface of described supporting electrode, the inner conductor that adopts, make the gold ion in the electrolytic solution can be in the surface reduction and the deposition of supporting electrode, under current effect, the extra gold ion that anode dissolution gets off, constantly replenish the concentration of cathode surface gold ion, thereby reach lower at concentration of electrolyte, the cathode and anode electric current is bigger, and the purification cycle obtains more highly purified gold than under the short condition at negative electrode.The used power supply of electrolysis adopts the asymmetry pulse power supply, replaces the periodic reverse power supply, can reduce transformer loss, abates the noise.Concrete, the positive pole of power supply connects anode, negative pole connects negative electrode, anode and negative electrode place electrolyzer, between the negative pole of power supply and negative electrode, a supporting electrode is set, described supporting electrode is in parallel with negative electrode, described supporting electrode is by shell, electrode and electrode solution constitute, described electrode and electrode solution are arranged in the shell, and the shell of described supporting electrode adopts non-metallic material to constitute, more specifically, described shell is made of pottery or elastomeric material or ionic membrane, described electrode is a conductor, is made of graphite, and described electrode solution is common electrolytic solution, the intermolecular gap of the shell of described supporting electrode is less than the diameter of gold ion, between described supporting electrode and negative electrode, the pilot circuit of connecting is regulated strength of current in the supporting electrode by the parameter that changes pilot circuit.
The present invention so can control electrolytic process in simple, intuitive ground, can reduce liquid making simultaneously with gold because adopted technique scheme, shortens electrolysing period, and reduction electrolysis cost has reached purpose of the present invention.
Below in conjunction with accompanying drawing and embodiments of the invention, the present invention is further illustrated.
Fig. 1 is the synoptic diagram of one embodiment of the invention,
The synoptic diagram of the supporting electrode that Fig. 2 is in the one embodiment of the invention to be adopted.
As shown in Figure 1, in one embodiment of the invention, adopt the asymmetry pulse power supply as electrolysis power 1, power supply 1 provides+120A (60A) /+6V (output 3V), the positive pole of power supply 1 connects anode 2, and negative pole connects negative electrode 3, and anode 2 and negative electrode 3 place electrolyzer 4, between the negative pole of power supply 1 and negative electrode 3, add a supporting electrode 5, described supporting electrode 5 is in parallel with negative electrode 3, and as shown in Figure 2, described supporting electrode 5 is by shell 6, electrode 7 and electrode solution 8 constitute, shell 6 is made of conductive rubber, its intermolecular gap is less than the diameter of gold ion, and electrode 7 is a conductor, is made of graphite, electrode solution 8 is common electrolytic solution, is made up of sodium chloride solution; In the electrolytic process, gold ion flows to supporting electrode 5 and negative electrode 3 from anode, because the intermolecular gap of the shell 6 of supporting electrode 5 is less than the diameter of gold ion, so the gold ion in the electrolytic solution can be in the surface reduction and the deposition of supporting electrode 5, therefore under current effect, the extra gold ion that anode dissolution gets off, constantly increase the concentration of cathode surface gold ion, thereby reach lower at concentration of electrolyte, the cathode and anode electric current is bigger, the purification cycle obtains more highly purified gold than under the short condition at negative electrode.Between supporting electrode 5 and negative electrode 3, the pilot circuit 9 of can also connecting, thus pilot circuit 9 can reach the purpose of control electrolytic process medium velocity and purity by changing the strength of current in the circuit parameter change supporting electrode 5.In certain embodiment of the present invention, electrolytic solution adopts the mixing solutions of hydrogenchloride and nitric acid, anode 2 forward current densities are controlled at 1000A/ square metre, reverse current density is controlled at 50A/ square metre, the supporting electrode current control is at 10mA, drop to former 1/2 of the gold amount of using with the gold amount, the electrolysis gold reaches 99.99% purity.Used in the present embodiment power supply 1 adopts the asymmetry pulse power supply, can reduce transformer loss, abates the noise.
Claims (2)
1, a kind of process for purifying gold that uses controllable pulse and auxiliary electrode, it is characterized in that: the positive pole of power supply connects anode, negative pole connects negative electrode, anode and negative electrode place electrolyzer, between the negative pole of power supply and negative electrode, a supporting electrode is set, described supporting electrode is in parallel with negative electrode, described supporting electrode is by shell, electrode and electrode solution constitute, described electrode and electrode solution are arranged in the shell, the shell of described supporting electrode is made of pottery or elastomeric material or ionic membrane, and described electrode is made of graphite, and described electrode solution is common electrolytic solution, the intermolecular gap of the shell of described supporting electrode is less than the diameter of gold ion, between described supporting electrode and negative electrode, the pilot circuit of connecting is regulated strength of current in the supporting electrode by the parameter that changes pilot circuit.
2, a kind of process for purifying gold that uses controllable pulse and auxiliary electrode according to claim 1 is characterized in that: the power supply that adopts the asymmetry pulse power supply to use as electrolysis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011052252A CN1173076C (en) | 2001-01-16 | 2001-01-16 | Process for purifying gold by use of controllable pulse and auxiliary electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011052252A CN1173076C (en) | 2001-01-16 | 2001-01-16 | Process for purifying gold by use of controllable pulse and auxiliary electrode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1366093A CN1366093A (en) | 2002-08-28 |
| CN1173076C true CN1173076C (en) | 2004-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011052252A Expired - Fee Related CN1173076C (en) | 2001-01-16 | 2001-01-16 | Process for purifying gold by use of controllable pulse and auxiliary electrode |
Country Status (1)
| Country | Link |
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| CN (1) | CN1173076C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101665953B (en) * | 2009-09-21 | 2010-12-08 | 重庆大学 | Energy-saving method for electrolyzing metal manganese |
| CN104178781B (en) * | 2013-05-24 | 2017-04-05 | 华东理工大学 | The electrolysis unit of electrorefining metal |
| MX2023002015A (en) | 2020-08-18 | 2023-04-11 | Enviro Metals Llc | Metal refinement. |
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2001
- 2001-01-16 CN CNB011052252A patent/CN1173076C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1366093A (en) | 2002-08-28 |
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