Increasing efficiency of equipment work for preliminary separation of non-ferrous metalsV.Ya. Potapov, A.I. Afanasyev, V.V. Potapov, D.S. Stozhkov and A.A. ChirkovaE3S Web Conf., 177 (2020) 03002DOI: https://doi.org/10.1051/e3sconf/202017703002