CITATION: Lottering, C. & Dorfling, C. 2018. Investigation of secondary zinc oxides as an alternative feed to the Skorpion Zinc process : Part 1 — leaching alternative zinc oxides. Journal of the Southern African Institute of Mining and Metallurgy, 118(7):695-704, doi:10.17159/2411-9717/2018/v118n7a3.