| abstract |
The present invention is directed to a method of purifying a zinc sulphate solution in the production of zinc oxide. In the preferred methodology there is a series of processes ranging from converting a zinc oxide/zinc metal residue material to zinc sulphate solution by leaching within acid, for example sulphuric acid, reacting the zinc sulphate solution with an alkaline metal carbonate to produce zinc carbonate, and then heating the zinc carbonate, for example, by calcining to produce zinc oxide in a highly pure form. |