FIELD: gold mining. SUBSTANCE: method consists in opening gold-containing raw material with aqueous sulfuric and nitric acids in presence of oxygen and includes separation of solid gold- containing cake from reaction solution and transferring further gold from cake into solution. Oxidative opening process is carried out in aqueous solution containing 0.7-4.5 M sulfuric acid and 0.14-2.8 M nitric acid at 20 to 90 C and pressure 0-7 atm using continuous bubbling of air through solution to dissolve 20 to 75 wt % of the total initial material, its particle size being 0.07 to 10.00 mm. Gold is extracted from solid with 1:4 dimethylsulfoxide-hydrogen chloride mixture. EFFECT: enhanced process efficiency and improved environmental safety. 3 cl, 4 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF GOLD EXTRACTION FROM PERSISTENT ORES AND CONCENTRATES | 1997 |
|
RU2119963C1 |
| METHOD OF GOLD RECOVERY FROM SOLID SILVER-CONTAINING SULFIDE ORES OF CONCENTRATES AND OF SECONDARY RAW MATERIALS | 2017 |
|
RU2657254C1 |
| METHOD FOR EXTRACTING GOLD FROM GOLD-CONTAINING FLOTATION CONCENTRATE | 2021 |
|
RU2763710C1 |
| TWO-FOLD HARDNESS GOLD-BEARING CONCENTRATES PROCESSING METHOD | 2016 |
|
RU2636775C2 |
| PROCEDURE FOR PROCESSING PERSISTENT URANIUM CONTAINING PYRITE AND VALUABLE METALS OF MATERIALS FOR EXTRACTION OF URANIUM AND PRODUCTION OF CONCENTRATE OF VALUABLE METALS | 2009 |
|
RU2398903C1 |
| METHOD FOR INCREASING GOLD EXTRACTION FROM CARBON RAW MATERIALS AFTER AUTOCLAVE PROCESSING USING ROASTING AUTOCLAVE RESIDUE | 2022 |
|
RU2805834C1 |
| METHOD OF PROCESSING CARBONACEOUS GOLD-CONTAINING CONCENTRATES | 2023 |
|
RU2824166C1 |
| METALS EXTRACTION FROM SULFIDE MATERIALS | 2003 |
|
RU2353679C2 |
| METHOD OF COMPLEX PROCESSING OF PYRITIC RAW MATERIALS | 2016 |
|
RU2627835C2 |
| METHOD FOR AUTOCLAVE PROCESSING OF CARBONACEOUS GOLD-CONTAINING CONCENTRATES USING ADDITIONAL OXIDANT REAGENT | 2019 |
|
RU2732819C1 |
