Polymetallic sulfide ores are found in abundance in nature and especially in our country, hence the great importance of studying their behavior in the differential flotation. There are ores that are very amenable to flotation and there are also other complex minerals that have a very complicated flotation because of different factors, the most difficult ones are those with natural activation of sphalerite and iron sulphides due to soluble salts that the mineral can have as a result of the presence of metal ions from different metals, mainly copper. The copper, lead and zinc ore that was studied did not show difficulties during the selective flotation; the quality and the separation efficiency of concentrates can be improved with more time and more stages of flotation cleaning. We defined the theoretical concepts of the selective flotation and made the mineralogical and chemical study of ...

Polymetallic sulfide ores are found in abundance in nature and especially in our country, hence the great importance of studying their behavior in the differential flotation. There are ores that are very amenable to flotation and there are also other complex minerals that have a very complicated flotation because of different factors, the most difficult ones are those with natural activation of sphalerite and iron sulphides due to soluble salts that the mineral can have as a result of the presence of metal ions from different metals, mainly copper. The copper, lead and zinc ore that was studied did not show difficulties during the selective flotation; the quality and the separation efficiency of concentrates can be improved with more time and more stages of flotation cleaning. We defined the theoretical concepts of the selective flotation and made the mineralogical and chemical study of ...

Tailings come from a mineral containing copper, silver and gold and recovery percentages of 90% of copper, 55 % of silver and 10% of gold from flotation. The study and mineralogic characteristic made to tail at 200 x magnification shows the presence of 54% of pyrite and 43% of gangue, does not detect gold, and has a chemical analysis of 3.74 gr/TM gold and 4.18 Oz/TC silver. The cyanidation tests made to the reground tailings at – 45 u give poor recoveries, 10% at most, reinforcing the hypothesis that the precious metal is in solid solution in the pyrite. Based on these results, cyanide lixiviation tests are performed using air and pyrometallurgical oxidation, in the first case 40% of cyanide dissolution is obtained trough air oxidation in alkaline media, and in the second case, 90% of gold is recovered trough roasting tests at 600° C, calcine wash to diminish the consumption of react...

Tailings come from a mineral containing copper, silver and gold and recovery percentages of 90% of copper, 55 % of silver and 10% of gold from flotation. The study and mineralogic characteristic made to tail at 200 x magnification shows the presence of 54% of pyrite and 43% of gangue, does not detect gold, and has a chemical analysis of 3.74 gr/TM gold and 4.18 Oz/TC silver. The cyanidation tests made to the reground tailings at – 45 u give poor recoveries, 10% at most, reinforcing the hypothesis that the precious metal is in solid solution in the pyrite. Based on these results, cyanide lixiviation tests are performed using air and pyrometallurgical oxidation, in the first case 40% of cyanide dissolution is obtained trough air oxidation in alkaline media, and in the second case, 90% of gold is recovered trough roasting tests at 600° C, calcine wash to diminish the consumption of react...