Beneficiation and hydrometallurgical processing of gold-containing sludge Sergei Ivannikov, Oleg Ageev, Svetlana Bratskaya, Michael Medkov, Evgeny Shamrai and Aleksandr Yudakov E3S Web Conf., 56 (2018) 03007 Published online: 26 September 2018 DOI: 10.1051/e3sconf/20185603007