GB382901A - A process for the treatment of precious metal-containing materials - Google Patents
A process for the treatment of precious metal-containing materialsInfo
- Publication number
- GB382901A GB382901A GB14745/32A GB1474532A GB382901A GB 382901 A GB382901 A GB 382901A GB 14745/32 A GB14745/32 A GB 14745/32A GB 1474532 A GB1474532 A GB 1474532A GB 382901 A GB382901 A GB 382901A
- Authority
- GB
- United Kingdom
- Prior art keywords
- precious metals
- silver
- treatment
- oxidizing
- gold
- 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
Links
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
- C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
- C22B3/08—Sulfuric acid, other sulfurated acids or salts thereof
-
- 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
Abstract
Material containing precious metals for example gold, silver, and platinum, as well as non-precious metals, such as the material obtained on fusing together alloys rich in copper and gold, such as old gold, silver articles, old gold-plated articles, and silver-plated articles, &c., is subjected to a preliminary mechanical-chemical treatment whereby the precious and non-precious metals are separated and may be subsequently extracted. The mechanical-chemical treatment consists in converting the material after melting into a porous granular or finely divided condition and subjecting the material in this condition to an oxidizing and calcining treatment, thereafter leaching out the oxidized material with dilute sulphuric acid, and finally separating the solution containing the non-precious metals from the undissolved residue containing the precious metals. A jet of water or compressed air, to which if necessary additional quantities of oxygen have been added, may be applied to the molten material to convert it into the granular form. For the oxidizing treatment, which is effected with the application of heat, solid, liquid or gaseous oxidizing agents may be employed; for example air, supplemented if desired by additional quantities of oxygen, is blown into the material. To facilitate the action of the oxygen, loosening agents for example sulphur, or metal sulphides, may be added to the material. The loosening process may take place before or during the oxidizing treatment. Copper passes into solution as sulphate and may be recovered therefrom. The residue, preferably after centrifuging is either cast into anodes and subjected to a process for recovering the precious metals, or is fused with scorifying or dissolving agents into a material suitable for cupelling. If the original material contains only silver and is free from other precious metals the residue may be directly refined with suitable oxidizing agents or electrolytically refined by known methods.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE382901X | 1931-07-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB382901A true GB382901A (en) | 1932-11-03 |
Family
ID=6361666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB14745/32A Expired GB382901A (en) | 1931-07-25 | 1932-05-24 | A process for the treatment of precious metal-containing materials |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB382901A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1987001732A1 (en) * | 1985-09-12 | 1987-03-26 | Fine Metals Export Corporation Pty Limited | Refining precious metals |
-
1932
- 1932-05-24 GB GB14745/32A patent/GB382901A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1987001732A1 (en) * | 1985-09-12 | 1987-03-26 | Fine Metals Export Corporation Pty Limited | Refining precious metals |
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