SO_2还原硒的热力学分析及应用研究

Thermodynamic analysis and application research for Se reduced by SO_2

对SO_2从含硒溶液中还原硒进行热力学分析,确定SO_2从含硒的溶液中还原制取粗硒的可能性以及热力学条件。结果表明:在pH=6、温度为80℃、SO_2通入速度为40～45 m^3/h的工艺条件下,约有99.9%的硒被还原,最终溶液中含硒<50 mg/L。

A thermodynamic analysis of selenium reduction from selenium-bearing solution by SO2 was carried out in this paper, the possibility and thermodynamic conditions to reduce and make crude selenium from selenium-bearing solution by SO2 was determined. The result showed that, under the technical conditions of pH 6, 80℃ temperature and 40 ~45 m3/h SO2 feed rate, around 99. 9% selenium could be reduced, with selenium content in the final solution less than 50 mg/L.