.Basic principles of copper removal from pyrite
Pyrite, also known as pyrite, is mainly composed of iron disulfide with the molecular formula FeSz Pyrite will slowly oxidize in the air to form iron trioxide and sulfur dioxide, which will decompose at high temperatures to form ferrous sulfide and elemental sulfur. Ferrous sulfide reacts with metallic copper to form cuprous sulfide and elemental iron.According to
relevant data, when the temperature exceeds 420℃ or above, iron disulfide begins to undergo a significant decomposition reaction. The higher the temperature, the stronger the reaction. Due to the fact that the majority of the reactions are carried out in lead solution, the generated elemental sulfur undergoes a chemical reaction with lead and copper in an instant, greatly improving the utilization rate of sulfur, reducing the volatilization of sulfur dioxide, and reducing the low-level pollution of the anode pot. Its Chemical equation is as follows: FeS:=FeS +S Pb +S = PbS
PbS +2Cu=CuS +Pb FeS +2Cu=CuzS+Fe