CN1104266A - Technology for extracting gold by directly electrolysing noble liquid cyanide - Google Patents
Technology for extracting gold by directly electrolysing noble liquid cyanide Download PDFInfo
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- CN1104266A CN1104266A CN 93115991 CN93115991A CN1104266A CN 1104266 A CN1104266 A CN 1104266A CN 93115991 CN93115991 CN 93115991 CN 93115991 A CN93115991 A CN 93115991A CN 1104266 A CN1104266 A CN 1104266A
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- Prior art keywords
- electrolyzer
- negative electrode
- liquid
- anode
- technology
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- 239000010931 gold Substances 0.000 title claims abstract description 19
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 229910052737 gold Inorganic materials 0.000 title claims abstract description 18
- 239000007788 liquid Substances 0.000 title claims description 27
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 title claims description 11
- 238000005516 engineering process Methods 0.000 title claims description 9
- 239000010970 precious metal Substances 0.000 claims abstract description 7
- 238000005868 electrolysis reaction Methods 0.000 claims description 15
- 239000003610 charcoal Substances 0.000 claims description 6
- 238000005363 electrowinning Methods 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 5
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- DPGAAOUOSQHIJH-UHFFFAOYSA-N ruthenium titanium Chemical compound [Ti].[Ru] DPGAAOUOSQHIJH-UHFFFAOYSA-N 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- 239000010936 titanium Substances 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 229910052763 palladium Inorganic materials 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 4
- 238000009776 industrial production Methods 0.000 abstract description 2
- 238000005406 washing Methods 0.000 description 6
- 238000007654 immersion Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 3
- KXZJHVJKXJLBKO-UHFFFAOYSA-N chembl1408157 Chemical compound N=1C2=CC=CC=C2C(C(=O)O)=CC=1C1=CC=C(O)C=C1 KXZJHVJKXJLBKO-UHFFFAOYSA-N 0.000 description 2
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 210000002268 wool Anatomy 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 210000005056 cell body Anatomy 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
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- Electrolytic Production Of Metals (AREA)
Abstract
The present invention relates to a technique for directly extracting gold and other precious metal from cyanated precious solution by using electrolyzation method. It is characterized by that a special electrolytic tank is used to make electrolyzation, and for 20-200 m3 of single day treatment quantity of precious solution, its technological parameters are as follows: flow rate of solution is 15-150L/min, current density is 500-1500 A/m2, tank voltage is 2.5-3.5V. Said invention is low in cost, and applicable to industrial production.
Description
The present invention relates to the technology of direct electrolytic metal from dilute solution, a kind of directly technology of electrowinning gold and other precious metal from the cyaniding immersion liquid is provided especially.
Direct electrolysis method is carried gold and is meant without enriching step directly electrowinning gold and other precious metal from the cyaniding immersion liquid.(containing the noble liquid cyanide of gold＜10mg/l) directly, the imagination of electrowinning gold and silver precious metal proposes nearly 2 years from lower concentration.Because this method has efficient, quick, energy-conservation and effectively utilizes sodium cyanide, reduce advantages such as environmental pollution, cause relevant investigator's extensive concern at home and abroad, and beginning is advanced to industrialization by the laboratory, since in the cyanating solution gold concentration very low (＜10mg/l), realize that direct electrolysis just must overcome four technological difficulties that cause thus:
A. reduce the tail washings gold content, reach high-recovery;
B. improve electrodepositing speed, adapt to the industrial production requirement;
C. reduce power consumption and other consumption, guarantee technical advantage;
D. control the electrolysis of sodium cyanide, accomplish economy, less contamination.
In recent years, carried out number of research projects in this field both at home and abroad, and mainly concentrated in the improvement of filling bed formula electrolysis grooved.Grooved is essentially two classes at present, and a class is a circular groove, is representative with the Zadra groove, solution is to flow through steel wool with a kind of outside form of upwards holding concurrently, the inflow that meets at right angles of solution and electric current, and its shortcoming is that flow of solution is not uniform, " effectively " electrode takes up space excessive, and the long-pending utilization ratio of the cell body of electrolyzer is low.Another kind of is rectangular tank, and liquid stream flows into abreast with electric current, and such electrolyzer is good than the performance of Zadra groove, but when using it for direct electrolysis treatment heap leaching solution, because of required cathode area must be very big, thereby cost is increased.
The object of the present invention is to provide a kind of from noble liquid cyanide the direct technology of electrowinning gold and other precious metal, its cost is low, is applicable to suitability for industrialized production.
The invention provides a kind of directly technology of electrowinning gold and other precious metal from noble liquid cyanide, it is characterized in that: the electrolyzer with a kind of special use carries out electrolysis, for day output 20～200m
3Your liquid situation, processing parameter is:
Solution flow rate: 15～150L/min
Current density: 500～1500A/m
2
Bath voltage: 2.5～3.5V
The present invention also provides a kind of electrolyzer that is used for above-mentioned technology, and negative electrode 1 is the filling bed type structure; Anode 2 is porous or reticulated structure, it is characterized in that:
(1) this electrolyzer is composed in series by 2～100 two groups of anodes 2, the one group of tank room vertical direction that negative electrode 1 constitutes stack;
(2) liquid in-out mouth 3,4 also is arranged on this direction.
Anode 2 usefulness corrosion resistant materials are made, as the ruthenium titanium coating titanium substrate anode, and palladium coated anode etc., negative electrode 1 is the charcoal fiber, materials such as steel brocade.Preferably fluid inlet 3 is arranged on the bottom, and liquid outlet 4 is arranged on top, and negative electrode 1 is preferably the charcoal fiber.The present invention fully contacts with negative electrode for making raw material, adopted the flow-through type design, it is even to make every effort to cloth liquid, vertically the tower structure of placing helps the gas discharge, prevents the air chamber phenomenon, and two resistance anodes are joined one group of negative electrode to improve electric field distribution, improved the negative electrode utilization ratio, reduce anodic current density simultaneously, reduced cyanide ion consumption, adopted charcoal fiber (surface-area 244.6cm
2/ g) replace steel wool (surface-area 34.46cm
2/ g), surface-area enlarges 7.1 times (under weight), and electrolytic speed is further accelerated.Corrosion-resistant negative electrode has further reduced bath voltage, has reduced cyanide ion consumption, dwindles interpole gap, reduces bath voltage, has reduced power consumption and cyanogen consumption.The direct electrolysis tech of rare gold solution provided by the present invention is one and puies forward golden novel process.Expanding test through handling 30t cyaniding immersion liquid day proves, at room temperature, cyaniding immersion liquid for different sources, different grade (Au content is lower than 10mg/l), use direct electrolysis method all can make the Gold Content of electrolysis tail washings be lower than 0.04mg/l, gold recovery reaches more than 99%, cyanide ion in the tail washings destroys＜20%, and can be used as immersion liquid and recycle.Whole technological operation is simple, and is widely applicable.Below by embodiment in detail the present invention is described in detail.
Accompanying drawing 1 is a kind of tower filling bed type electrolyzer.
As shown in Figure 1, make negative electrode 1 with the charcoal felt, negative electrode 1 and two dividing plates 6 constitute cathode compartment 7, enumerate at vertical direction by the tank room that 10 cathode compartments 7 and respective anode 2 thereof constitute, fluid inlet 3 below, liquid outlet 4 up, all isolated and sealings between anode 2 and cathode compartment 7 and the liquid in-out mouth 3,4 with packing ring 8, steady between liquid in-out mouth 3,4 each cathode compartment 7 with screw 8, anode 2 ruthenium titanium coating titanium substrate anode.
Embodiment 2
To containing golden 10mg/l, the alkaline noble liquid cyanide of argentiferous 19mg/l carries out direct electrolysis and proposes the gold test, and solution is by being pumped into tower electrolyzer, and flow velocity is 20I/min, current density 780A/m
2, bath voltage 2.5V, the electrolysis treatment amount is 30m
3Your, tail washings contains golden 0.015mg/l, argentiferous 0.06mg/l liquid/day.
To containing golden 6mg/l, argentiferous 10mg/l, the alkaline noble liquid cyanide of cupric 1400mg/l carry out direct electrolysis and propose the gold test, and solution is pressed in the electrolyzer with the 125I/min flow velocity by pump, electrolytic cell currents density 1150A/m
2, bath voltage 3.1V, the electrolysis treatment amount is 180m
3Your, tail washings contains golden 0.015mg/l, argentiferous 0.05mg/l, cupric 720mg/l liquid/day.
Embodiment 4
CuSO to cupric 4000mg/l
4Solution carries out direct electrolytic trial, and the solution pH value is 4, solution with the 100L/min flow velocity by being pumped in the electrolyzer current density 1250A/m
2, bath voltage 2.5V, the electrolysis treatment amount is 140m
3Liquid/day, tail washings cupric 0.01mg/l.
Claims (6)
1, a kind of directly technology of electrowinning gold and other precious metal from noble liquid cyanide, it is characterized in that: the electrolyzer with a kind of special use carries out electrolysis, for day output 20～200m
3Your liquid situation, processing parameter is:
Solution flow rate: 15～150L/min
Current density: 500～1500A/m
2
Bath voltage: 2.5～3.5V
2, a kind of electrolyzer that is exclusively used in the described technology of claim 1, negative electrode (1) is the filling bed type structure; Anode (2) is porous or reticulated structure, it is characterized in that:
(1) this electrolyzer is by 2～100 two groups anodes (2), and the tank room vertical direction stack that one group of negative electrode (1) constitutes is composed in series;
(2) liquid in-out mouth (3), (4) also are arranged on this direction.
3, by the described electrolyzer of claim 2, it is characterized in that: anode (2) is made of corrosion resistant material, as the ruthenium titanium coating titanium substrate anode, and palladium coated anode etc., negative electrode (1) is the charcoal fiber, materials such as steel brocade.
4, by claim 1,2 described electrolyzers is characterized in that best fluid inlet (3) is arranged on the bottom, and liquid outlet (4) is arranged on top, and negative electrode (1) is preferably the charcoal fiber.
5, by claim 1,2 described electrolyzers is characterized in that: also can be provided with surge chamber (5) between tank room.
6, by the described electrolyzer of claim 3, it is characterized in that: between tank room, also can be provided with surge chamber (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93115991 CN1104266A (en) | 1993-12-24 | 1993-12-24 | Technology for extracting gold by directly electrolysing noble liquid cyanide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93115991 CN1104266A (en) | 1993-12-24 | 1993-12-24 | Technology for extracting gold by directly electrolysing noble liquid cyanide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1104266A true CN1104266A (en) | 1995-06-28 |
Family
ID=4991519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93115991 Pending CN1104266A (en) | 1993-12-24 | 1993-12-24 | Technology for extracting gold by directly electrolysing noble liquid cyanide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1104266A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1051809C (en) * | 1995-07-06 | 2000-04-26 | 青岛大学 | Method for chemically and electrolytically recovering and extracting gold |
-
1993
- 1993-12-24 CN CN 93115991 patent/CN1104266A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1051809C (en) * | 1995-07-06 | 2000-04-26 | 青岛大学 | Method for chemically and electrolytically recovering and extracting gold |
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