SOLUTION FOR LEACHING ORE MINERALS AND CONCENTRATES Russian patent published in 1996 - IPC

FIELD: ore and concentrate concentration and underground leaching of uranium and other precious metals. SUBSTANCE: invention provides more complete removal of noble and other metals from clayey gold-containing ores, increased leaching degree enhanced filtering capability of pulps, lowered swelling ability of clayey inclusions at underground leaching of noble metals and uranium from mudded off uranium-containing sandstones. A main leaching solution for ore minerals and concentrates represents a solid jet-engine fuel-hydrasine hydrate and product of its interaction with acids in the form of aqueous solution at presence of quinoline or its derivatives:isoquinoline, 4- methylquinoline or 3-ethylquinoline. Such solution may be used in combination with cyanide and thiocarbamide processes with provision of reliable protection of equipment and pipelines from corrosion in aqueous solutions of hydrochloride of hydrasine. EFFECT: enhanced leaching degree of noble and other metals. 9 cl, 4 tbl