METHOD AND DEVICE FOR EXTRACTING GOLD FROM ORE Russian patent published in 1997 - IPC

FIELD: mining industry. SUBSTANCE: this relates to lixiviation of gold by leaking through with cyaniding by solutions which are fully saturated with oxygen with high speed of ion exchange between solution and material. According to method, cyanide solution is forced through ground rock under pressure generated by compressor which at the same time saturates solution with oxygen. Device for realization of aforesaid method has cylindrical vessel provided with charging and discharging holes and drain pipe union. Secured inside vessel above pipe union is screen with filter placed on it. Device also has tank for collection of used solution, solution transfer pump, and compressor. Primary material in the form of ground ore is charged into vessel over filter and cyanide solution is poured over it. Then vessel is hermetically closed and compressor is actuated. Due to excess pressure, solution saturated with oxygen passes through material and lixiviates gold from it. Concentration of gold in solution is periodically checked by analyzer. After entire volume of solution goes out of vessel, it is opened and again filled with same solution which is further forced through material under pressure. Process is discontinued when concentration of gold in solution stops growing. EFFECT: high efficiency. 2 cl, 1 dwg