METHOD OF EXTRACTION OF GOLD AND SILVER IN SOLUTION BY HYDROCHLORINATION AND CAVITATION DISPERSION Russian patent published in 2003 - IPC

FIELD: hydrometallurgy of noble metals; technology of extraction of gold and silver from mining mass, ore concentrates and semi-finished products, tailings of concentrating plants; alternative technological cyanidation process. SUBSTANCE: method consists in grinding ore in cavitation dispensers to required consistency at simultaneous hydrochlorination in solution of sodium chloride and hydrochloric lime making use of cavitation effects: heating the pulp, forming hydrogen peroxide and shock waves breaking hardly soluble oxide films on surfaces of metals being extracted. Solid fraction is separated from gold- and silver-containing solutions by settling on watertight platform of primary settler. After primary settling, solution is drained to secondary settler for clarification and solid fraction is subjected to vacuum drying. After drying and dehydration, sand-and-sludge mixture of solid fraction goes to waste. EFFECT: reduction of time required for extraction; enhanced profitableness. 3 cl, 3 dwg