Hydrometallurgical method for the Recovery of zinc in Sulphuric Acid from zinc sulfide concentrates with high iron content

摘要

Refers to a hydrometallurgical method for the Recovery of zinc in Sulphuric Acid from zinc sulfide concentrates with High Content of IronWhich includes: (a) a part of the Roasting of zinc Concentrate; (b) where the neutral leaching dissolves zinc oxide; c) acid leaching of zinc ferrites by using Concentrated sulfuric acid as electrolyte and exhausted, generating a solution that contains (i) between 10 and 35 g / l Fe + + +, (ii) between 10 and 70 g / l Sulphuric Acid,(iii) a residue where the lead, Silver and Gold, and (iv) a solution of zinc and iron; (d) Reducing the Fe + + + contained in the previous Stage Fe + + by adding zinc Concentrate; e) neutralizing the acidity in the resulting solution with calcine, generating a final solution With a pH from 3.8 to 5.2; (f) Iron oxidation and precipitation of jarosite in the resulting Solution free of Solid Pollutants, through the Injection of oxygen and the addition of an Alkali or Salt of Na +, NH4 +, resulting in a solution with a pH of 1.5 and 10 g / l acidity