Dr. Constantin Polinowski writes about the technologies of extraction of valuable components from poor ores and industrial waste. He has been working in industrial and scientific organizations for about 30 years. He is the author or co-author of more than 20 scientific articles and a number of patents. He graduated from the Kazakh Polytechnic Institute in 1987, defending his PhD thesis in 1998 at the Institute of Metallurgy and Ore Beneficiation (Kazakhstan). Dr. Polinowski serves as the Deputy Director for Science in Hardening Innovation Center, Ltd.