【摘要】 锰矿浆烟气脱硫过程中会产生副产物连二硫酸锰（MnS₂O₆）,它的存在制约了脱硫液中锰的资源化利用.基于锰矿组成提出铁强化MnO₂去除MnS₂O₆新工艺，探究了不同铁化学环境对MnO₂去除S₂O₆^2-影响.结果表明，加入Fe（Ⅲ）对于二氧化锰去除S₂O₆^2-具有良好促进作用，去除率呈递增趋势，在5 g·L^-1质量浓度的硫酸下去除率可达55.1%.操作条件优化实验结果表明，反应温度90℃,H₂SO₄质量浓度5 g·L^-1,Fe（Ⅲ）质量浓度15 g·L^-1,n(S₂O₆^2-)∶n（MnO₂）=1∶20,反应时间3 h的工况条件组合下S₂O₆^2-的效果较佳.更多还原

【Abstract】 Manganese ore slurry flue gas desulfurization will produce the by-product manganese dithionate（MnS₂O₆）, and the presence of dithionate greatly affects the resource utilization of manganese in the desulfurization solution. A new process for iron-enhanced MnS₂O₆ elimination by MnO₂ is proposed based on the composition of most manganese ore. The results show that the addition of Fe（Ⅲ）has a good promotion effect on the elimination of dithionite by MnO₂. The degradation efficiency gradually increases with the increase of Fe（Ⅲ）, and the best degradation efficiency can reach 55.1% at 5 g·L^-1 of H₂SO₄. The optimum operation conditions obtained are 90 ℃ reaction temperature, 5 g·L^-1 of H₂SO₄, 15 g·L^-1 of Fe（Ⅲ）addition, n(S₂O₆^2-)∶ n（MnO₂）=1∶20 and 3 h duration time.更多还原