METHOD FOR HEAP LEACHING OF GOLD FROM REFRACTORY ORES AND TECHNOGENIC MINERAL RAW MATERIAL Russian patent published in 2017 - IPC C22B11/00 C22B7/00 C22B3/04 

FIELD: mining.

SUBSTANCE: invention relates to a method of extracting gold from refractory ore and technogenic mineral stock. Method involves the following: at agglomeration the raw material mass is fed with an electro-activated concentrated solution of cyanides of alkali metals, and after producing pellets - with heated compressed air, in which after removal of the main part of moisture from the pellets chemically active gases are pumped in. After that feeding of the air with chemically active gases is stopped. After drying the agglomerated mass is fed in the penetration mode with a solution of complexing agent for gold, a pause is maintained and supply of the compressed air is resumed, which is pumped with chemically active gases. Then the mineral mass is sprayed with water or a low concentration solution of a leaching reagent. Then the obtained productive solutions are sent for sorption of gold.

EFFECT: technical result of the invention is higher efficiency of extracting gold from ores and technogenic mineral formations due to increased speed of extracting dispersive gold from particles of quartz and chalcedony, as well as sulphide-sulphosalt minerals.

1 cl, 1 ex