Method for processing zinc silicate-containing zinc crude material

摘要

Provided are methods for processing a zinc silicate-containing zinc crude material capable of quickly precipitating eluted silica in a solid-liquid separable form in a strong acid condition at simple facilities in dissolving the zinc silicate-containing zinc crude material in a leaching tank filled with a sulfuric acid-acidified solution to extract zinc. One method for processing a zinc silicate-containing zinc crude material is characterized by maintaining a sulfuric acid-acidified solution at the following conditions of the liquid temperatures, the pH and the SiO2 concentration in extracting zinc from a zinc silicate-containing zinc crude material in a sulfuric acid-acidified leaching tank: liquid temperature (t) : t >/= 75 DEG C pH : 1.5