| Title |
On the Leaching of pyrrhotite under High Temperature and Oxygen Pressure |
| Authors |
강남기(Nam Kee Kang); 고인용(In Yong Ko); 오재현(Jae Hyun Oh) |
| Abstract |
A study on the leaching of pyrrhotite was carried out in the presence of oxygen and sulfuric acid. The effects of various reaction factors such as a concentration of leachant, temperature and partial pressure of oxygen were discussed. The results are as follows. 1. The rate of the hydrolysis reaction of ferric ion and the oxidation reaction of ferrous ion into ferricion increases with the increase of temperature and partial pressure of oxygen. 2. The phase of precipitate which is the product of the hydrolysis of ferric ion is changed with the increase of temperature 110℃, 130℃, 150℃ as follows. Fe₂(SO₄)₃ → Fe₃(SO₄)₂(OH)_5 2H₂O → 3Fe₂O₃4SO₃ → αFe₂O₃ 3. The sulfur in the pyrrhotite can be removed as elemental state. The elemental sulfur can be easily oxidized. 4. The reactivity of hexagonal pyrrhotite is greater than the mono type pyrrhotite. |