Zinc Hydrometallurgy Process Shen alum iron removal process

A wet method zinc smelting process of the present invention, Shen alum iron, comprising the steps of: adjusting the PH value of the supernatant Shen alum, an oxidizing agent is added to adjust the reaction solution PH = 4.8 ~ 5.2, precipitated iron, adjusting Shen alum serum PH = 3.5 ~ 4.5; the oxidizing agent is H2O2 and H2O2 oxidants or manganese oxidants joint, the reaction temperature is 60 ~ 70 ℃, the reaction was stirred for 40 ~ 90min. Using H2O2 oxidant or H2O2 and manganese joint oxidant Fe2 + jarosite be removed as Fe3 +, formation, and low cost, can reduce system manganese ion content will be of manganese ions in the effective control of the process requirements of 5 ~ 6g / l, effectively reducing the amount of circulating systems to reduce acid leaching slag, jarosite slag zinc content, both to improve the recovery of zinc metal, but also improves the efficiency of the electrolysis current, reduce power consumption, the process is simplified.