Recovery technology of gold and silver from gold-lead gravity concentrate

Technology of recovery gold and silver is studied to improve recovery ratio from gold-lead gravity concentrate. The results show that the technology of tabling concentration -melting of tabling concentrate -cyaniding of tabling tailing is effective on recovery gold and silver. The recovery ratio of gold and silver on tabling experiment are 89.43 % and 74.07 %, respectively. The recovery ratio of gold and silver on smelting experiment are 99.98 % and 99.95 %, respectively. Under the condition of pH 10~11, concentration of NaCN 1 ‰, mud concentration 10 %, time 24 h, gold and silver in slag of leaching can decrease to 6.33 g /t and 339.6 g /t, respectively. The recovery ratio of gold and silver on leaching experiment are 98.97 % and 55.94 %, respectively. The consumption of NaCN is 6.03 kg/t.