ICEMEXM 2021: 15. International Conference on Extractive Metallurgy and Extraction of Minerals aims to bring together leading academic scientists, researchers and research scholars to exchange and share their experiences and research results on all aspects of Extractive Metallurgy and Extraction of Minerals. It also provides a premier interdisciplinary platform for researchers, practitioners and educators to present and discuss the most recent innovations, trends, and concerns as well as practical challenges encountered and solutions adopted in the fields of Extractive Metallurgy and Extraction of Minerals