研究了含锰收尘灰加压浸出的影响因素.结果表明,优化浸出工艺条件为:液固比5mL/g,初始硫酸浓度120g/L,浸出温度120℃,体系压力0.8MPa,锰收尘灰/硫铁矿质量比1:0.5,浸出时间2h,搅拌转速500r/min.在该条件下,Mn浸出率约96.1%,Fe浸出率仅7%左右,终酸残余率约34.9%.该浸出工艺效果良好且稳定,Mn与其他杂质元素的分离效果良好,可取得常压浸出条件难以取得的理想浸出效果. The factors influencing the pressure leaching of manganese-containing dust were studied. The results showed that the optimized leaching conditions were liquid-solid ratio 5mL / g, initial sulfuric acid concentration 120g / L, leaching temperature 120 ℃, system pressure 0.8MPa, Under the conditions, the leaching rate of Mn is about 96.1%, the leaching rate of Fe is only about 7%, and the residual rate of terminal acid is about 34.9% .At the same time, the mass ratio of ash / pyrite is 1: 0.5, leaching time is 2h, stirring speed is 500r / The effect of leaching process is good and stable. The separation effect of Mn and other impurity elements is good, and the ideal leaching effect can be obtained which is difficult to obtain under atmospheric pressure leaching conditions.