US998749A - Treatment of precious metalliferous ores. - Google Patents
Treatment of precious metalliferous ores. Download PDFInfo
- Publication number
- US998749A US998749A US54995810A US1910549958A US998749A US 998749 A US998749 A US 998749A US 54995810 A US54995810 A US 54995810A US 1910549958 A US1910549958 A US 1910549958A US 998749 A US998749 A US 998749A
- Authority
- US
- United States
- Prior art keywords
- solution
- ore
- cyanid
- mixture
- precious
- Prior art date
- 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.)
- Expired - Lifetime
Links
- 239000000203 mixture Substances 0.000 description 13
- ZMZDMBWJUHKJPS-UHFFFAOYSA-M Thiocyanate anion Chemical compound [S-]C#N ZMZDMBWJUHKJPS-UHFFFAOYSA-M 0.000 description 11
- ZMZDMBWJUHKJPS-UHFFFAOYSA-N hydrogen thiocyanate Natural products SC#N ZMZDMBWJUHKJPS-UHFFFAOYSA-N 0.000 description 11
- 238000000034 method Methods 0.000 description 11
- 239000002253 acid Substances 0.000 description 9
- 239000010970 precious metal Substances 0.000 description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 229910052736 halogen Inorganic materials 0.000 description 4
- -1 halogen salt Chemical class 0.000 description 4
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 description 4
- 238000013019 agitation Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- XLJMAIOERFSOGZ-UHFFFAOYSA-M cyanate Chemical compound [O-]C#N XLJMAIOERFSOGZ-UHFFFAOYSA-M 0.000 description 2
- 150000002366 halogen compounds Chemical class 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052714 tellurium Inorganic materials 0.000 description 1
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/045—Leaching using electrochemical processes
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
- C22B11/08—Obtaining noble metals by cyaniding
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Definitions
- My invention relates to novel methods of treating ores bearing precious metals, which methods are particularly described and pointed out in the following specification and. claims.
- Example 1 2000 pounds of pulverized ore are suspended in a solution of 2 pounds of thiocynate, 2 pounds of caustic soda or caustic lime, 1 pound of potassium iodid in an agitation tank, the mixture being in the proportion of two'p'arts said solution to one part of ore.
- This mixture of ore and solution is continuously circulated for a period of eight hours through an electrolyzer having a current density of about 50 amperes per square foot of anode surface.
- Example 3 .2000 pounds of the pulverized ore are suspended in a solution of 2 pounds of thiocyanate, 2 pounds caustic soda or caustic lime in an agitation tank, the mixture being in the proportion of two parts of said solution to one part of ore.
- This mixture of ore and solution is continuously circulated for a period of eight hours through an clectrolyzer having a current density of about 50 amperes per square foot of anode surface. About from 00 to 120 ampcres are used per ton otore.
- the function of the electric current is simply one to produce nascent oxygen or liberate iodin from the haloid salt.
- the electric current in the first and second examples liberates iodid from the contained potassium iodid which coinbincs with the cyanid or the sulto-cyai'iid, to form cyanogen iodid.
- the cyanogen iodid as produced is an excellent. solvent for gold contained iii-refractory ores containing gold tellurid, sultids, arsenids, etc, third example, which does not contain halogen salt, the electric current generates po tassium cyanid trom sulfo-cyanido it.
- the reason for using thiocyanate alone or in conjunction with the simple cyanid solution in preference to the ordinary alkaline cyanid solution is that, if cyanid solution be used without containing sulfocy-- or the addition thereof, the nascent oxygen produced by the electric current destroys the cyanid by converting the same into cyanate, which is not a gold solvent,
- the process of treating ore containing precious metals which consists in subjecting the ore to a solution containing thiocyanate, and a soluble iodin compound, and electrolyzing the mixture.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Electrochemistry (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Manufacture And Refinement Of Metals (AREA)
Description
JOHN COLLINS CLANCY, OF NEW ,YORK, N. Y.,
ASSIGNOR TO GLANCY METALS PROCESS COMPANY, A CORPORATION-OF NEW YORK.
TREATMENT OF PRECIOUS METALLIFEROUS ORES.
N 0 Drawing.
Specification of Letters Patent. Patentd July 25 11 9111, Application filed March 17, 1910. Serial No. 549,958.
I '0 all wiiom it may concern:
Be itknown that I, JOHN CoLLINs Comer, a subject of the King of Great Britain, having declared my intention of becoming a citizen of the United States, at present residing at New York city, borough of lilanhattan, in the county of New York and State of New York. have invented certain new and useful Improvements in the 'lreatment of Precious Metalliterous Ores, of which the following is a specification.
My invention relates to novel methods of treating ores bearing precious metals, which methods are particularly described and pointed out in the following specification and. claims.
l have discovered that when the pulverized ore is converted into a pulp by mixing the said ore with a substantially non-acid solution of a thiocyanatc containing a halogen salt, and electrolyzing this mixture, that the precious metals only will be dissolved to the substantial exclusion of the baser metals, and that the above solution may be used with advantage in conjunction with the ordinary cyanid solution, and that this process may be successfully applied to either rebellious or nonrebellious ore without preliminary roasting even though such ores contain reducing agents or tellurium or both. A
In treating. ores containing among other compounds silver sul-tids, it may not be neces ary to add a halogen salt to the thiocyanate solution as the nascent. oxygen produced by the electric current will act according to the second equation shown herein.'
I give the following examples of my process without, however, limiting myself to the details of each:
Example 1: 2000 pounds of pulverized ore are suspended in a solution of 2 pounds of thiocynate, 2 pounds of caustic soda or caustic lime, 1 pound of potassium iodid in an agitation tank, the mixture being in the proportion of two'p'arts said solution to one part of ore. This mixture of ore and solution is continuously circulated for a period of eight hours through an electrolyzer having a current density of about 50 amperes per square foot of anode surface.
are used per 1 pound of potassium iodid in an agitation.
tank, the mixture being in the proportion of two parts said solution to one part of ore. This mixture of ore and solution is continuously circulated for aperiod of eight hours through an clcctrolyner having a cur rent density of about 50 ampcres per square foot of anode surface. About from 90 to 120 ampcrcs are used per ton ore.
Example 3: .2000 pounds of the pulverized ore are suspended in a solution of 2 pounds of thiocyanate, 2 pounds caustic soda or caustic lime in an agitation tank, the mixture being in the proportion of two parts of said solution to one part of ore. This mixture of ore and solution is continuously circulated for a period of eight hours through an clectrolyzer having a current density of about 50 amperes per square foot of anode surface. About from 00 to 120 ampcres are used per ton otore.
It will be seen that the function of the electric current is simply one to produce nascent oxygen or liberate iodin from the haloid salt. The electric current in the first and second examples liberates iodid from the contained potassium iodid which coinbincs with the cyanid or the sulto-cyai'iid, to form cyanogen iodid. The cyanogen iodid as produced is an excellent. solvent for gold contained iii-refractory ores containing gold tellurid, sultids, arsenids, etc, third example, which does not contain halogen salt, the electric current generates po tassium cyanid trom sulfo-cyanido it. may be seen from the filllow ing equations the reason for using thiocyanate alone or in conjunction with the simple cyanid solution in preference to the ordinary alkaline cyanid solution is that, if cyanid solution be used without containing sulfocy-- or the addition thereof, the nascent oxygen produced by the electric current destroys the cyanid by converting the same into cyanate, which is not a gold solvent,
in the and, therefore, simply results in the destruction of the c'yan1d,after the following equation (1) KCN-t-O KCNO; whereas by using thiocyanate the equation as V t (2) KCNS+H,O-t30:KCN-t-ILSO itwill be seen from the equation X0. 2 that cyanid is produced when the solution is kept alkaline, and the cyanid so formed is not decomposed as long as there is thiocyanate present in the solution. By adding a halogen compound to the thiocyanate solution which may or may not contain free alkaline cyanid and electrolyzing same, the following equation takes place:
(a KG 'S-t-KI+&O:IGN+K SO is prevented if the solution be substantially acid, but the solution may be alkaline, neu.v
tral or slightly acid. lly slightly acid, I
mean this? that while a solution of thio-' cyanate may be technically termed slightly acid because showing acidity to certain tests, yet for practical purposes it is suhstantially non-acid. Such a solution l catt a substantially non-acid solution as well as those which are alkaline or neutral.
Having thus described my invention and examples of ditlerent ways of carrying it into effect, it will be understood that various modifications and changes in the described processes may be made and equivalent sub stances may be employed without departing from the spirit of my invention and Without exceeding the scope of my claims.
What I claim and desire to secure by Letters Patent of the United States is:
1. The process of treating ore containing precious metals which consists in subjecting ore to a thiocyanate solution, containing a halogen salt, and electrolyzing the mixture.
2. The process of treating ore containing precious metals whiclrcpnsists i'n subjecting ore to a solution containing a thiocyanate, a soluble cyanid and a halogen compound, and electrolyzing the mixture.
The process of treating ore containing precious metals which consists in subjecting the ore to a solution containing thiocyanate, and a soluble iodin compound, and electrolyzing the mixture.
4:. The process of treating ore containing precious metals which consists in subjecting ore to a solution containing a thiocyanatc, a soluble cyanid, and a soluble iodin compound, and elcctrolyzing the mixture.
The process of treating ore containing precious metals which consists in subjecting the ore to a substantially non-acid'solution of thiocyanate, and elcctrolyzing the mixture.
(3. The process of treating ore containing precious metals which consists in subjecting the ore to a substantially non-acid solution of thiocyanate containing a soluble cyanid, and electrolyzing the mixture for a sufiicicnt period to extract the precious metals.
in testimony whereof I have hereunto signed my name to this specification in the presence of two subscribing witnesses.
JOHN COLLINS CLANCY.
Witnesses M. E. McNINcI-I, A. B. Aimnns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US54995810A US998749A (en) | 1910-03-17 | 1910-03-17 | Treatment of precious metalliferous ores. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US54995810A US998749A (en) | 1910-03-17 | 1910-03-17 | Treatment of precious metalliferous ores. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US998749A true US998749A (en) | 1911-07-25 |
Family
ID=3067076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US54995810A Expired - Lifetime US998749A (en) | 1910-03-17 | 1910-03-17 | Treatment of precious metalliferous ores. |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US998749A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2843538A (en) * | 1954-10-01 | 1958-07-15 | Haugen Ole Wilhelm | Electrolytic process for leaching precious metals |
| US4510027A (en) * | 1981-04-15 | 1985-04-09 | Freeport Minerals Company | Simultaneous leaching and electrodeposition of precious metals |
-
1910
- 1910-03-17 US US54995810A patent/US998749A/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2843538A (en) * | 1954-10-01 | 1958-07-15 | Haugen Ole Wilhelm | Electrolytic process for leaching precious metals |
| US4510027A (en) * | 1981-04-15 | 1985-04-09 | Freeport Minerals Company | Simultaneous leaching and electrodeposition of precious metals |
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