UNIONSUM international industrial Co., Ltd (UNIONSUM), a subsidiary of Changsha Research Institute of Mining and Metallurgy (CRIMM), is an international engineering company for nonferrous industry. We are dedicated to developing sustainable system solutions for our customer in the field of: Minerals processing; Nonferrous metallurgy; Recovering valuable metal from waste materials; Offgas/waste water/slag control & treatment. Our main business involves: Consultation and scientific ...