FIELD: noble metal metallurgy; extraction of noble metals from middlings of metallurgy process, refining process in particular.
SUBSTANCE: proposed method consists in blending the starting material containing noble metals and copper sulfides with caustic soda (NaOH) at weight ratio of NaOH:starting material not below ).5:1 and heating at temperature of 550-650°C for 3.0-3.5 h. Mass ratio of copper to sum of noble metals in products being processed shall be no less than 2:1. Proposed method ensures low-temperature concentration of noble metals at avoidance of separation of gaseous sulfur-containing compounds.
EFFECT: enhanced efficiency; avoidance of separation of gaseous sulfur-containing compounds.
2 tbl, 8 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF REDUCTION OF COPPER FROM SULFIDE COMPOUNDS | 2004 |
|
RU2254385C1 |
| METHOD OF RECOVERING GOLD FROM GOLD ORE CONCENTRATES | 2004 |
|
RU2259410C1 |
| METHOD OF REDUCTION OF COPPER OUT OF SULPHIDE PRODUCTS | 2006 |
|
RU2329315C2 |
| METHOD OF REDUCTION OF LEAD | 2005 |
|
RU2282672C1 |
| METHOD OF GOLD EXTRACTION FROM SULFIDE AND ARSENO-SULFUR CONCENTRATES | 2007 |
|
RU2360016C1 |
| METHOD OF PRODUCTION OF CRUDE LEAD | 2005 |
|
RU2283884C1 |
| PROCESS OF RECOVERING GOLD FROM ARSENO-PYRITE CONCENTRATE | 2006 |
|
RU2321648C1 |
| METHOD OF RECOVERING LEAD FROM OXYSULPHATE SLUDGE OF STORAGE BATTERIES | 2019 |
|
RU2693245C1 |
| METHOD OF GOLD EXTRACTION FROM MINING CONCENTRATES | 2006 |
|
RU2324749C1 |
| METHOD OF EXTRACTING GOLD FROM GOLD ORE CONCENTRATES | 2020 |
|
RU2742554C1 |
