Jean Jacques Kalombo Mbayo is a PhD researcher in the School of Chemical and Metallurgical Engineering at the University of Witwatersrand in South Africa. He holds a BSc & Honors degree in Chemical Engineering; and a Master degree with distinction in Metallurgical Engineering from the University of Witwatersrand. Jean Jacques has over three years of experience in the technical service of various metallurgical companies. He has specialized in the extractive metallurgy of Gold, hydrometallurgy, design of reactors, development and implementation of innovative ideas to extract, recover and purify metals.