Abstract: Taking Ferric Sulfate as the Oxidant,a series of oxidation experiments on galena in different oxidation medium concentration are conducted under different condition with pH 2,temperature 50 ℃ and 25 ℃ repectively.Then,the reation rate constant,reaction order，reaction activation and the function of the reaction kinetics can be determined by computation.And some effects of temperature and oxidized medium on galena oxidation speed are studied.Under the condition of 50 ℃,and Fe₂(SO₄)₃ as oxidant,the oxidation reaction rate is very fast when solution concentration is 100m g/L.The higher the concentration is,the more sulfuric acid ion can be got,and the easier sediment of PbSO₄ is produced,leading the reaction impeded.And the reaction will be extremely slow or even can't carry on at 25 ℃.

Key words: Galena, Oxidation Kinetics, Reaction Rate