The Study of Acidic Decomposition Zinc Sulfite

The acidic decomposition mechanism of zinc sulfite coming from zinc oxide desulfurization process was investigated ,the factors such as reacting time, terminal pH value (the quantity of added acid) ,temperature, vacuum, the solid content of zinc sulfite slurry and the method of adding acid which influence this decomposition reaction were studied and the optimum condition was summarized.When the system was depressurized and pH was kept between 5.0～4.0,optinil decomposing rate was achieved.Elevated temperature was favourable to the decomposition process.The products from zinc oxide desulfurization can be obtained in the form of high-concentrated SO 2 and zinc sulfate or electrolytic zinc.