«O’zGeorangmetliti» SUE (Tashkent, Republic of Uzbekistan):

Raimzhanov B. R., Deputy Executive Officer on Science, Professor, Doctor of Engineering Sciences, phone: +998 (71) 140-42-13

+Namazbayov N. N., Chief Specialist till 2012

Namazbaev Sh. N., Leading Engineer

Namazbaev Sh. N., First Category Engineer

Specialists of O’zGeorangmetliti Institute have carried out the researches on heap hydrochlorination of gold by oxychloride solutions from technologically refractory carbonic, sulphide and carbonic-sulphide ores. Amount of gold extraction was more than 85%. There were carried out the integrated laboratory researches of process of oxychloride leaching of gold from old tailings of cyanide heap leaching of ores of one of Kyzyl Kum deposits. Research results have shown that heap hydrochlorination of gold from old tailings of cyanide heap leaching makes it possible to carry out the efficient extraction of precious metals into productive oxychloride solutions and simultaneous carrying out of neutralization of worked out mass of in situ piles. There is reached the high grade of gold opening from poor and rich ores. According to this, there can be made a conclusion that hydrochlorination makes it possible to take into account the specific peculiarity of natural gold-containing materials, which is included in significant oscillation of metal content.