“…More specifically, the grinding chemistry through electrochemical interactions between grinding media and sulphide minerals is known to markedly affect the subsequent sulphide flotation. A great number of works on this subject are reported in the literature (Adam et al, 1984;Bruckward et al, 2011;Gonçalves et al, 2003;Greet et al, 2004;Grano, 2005a, 2005b;Ekmekçi et al, 2005;Grano, 2009). Carbon steel grinding media, through galvanic interactions and oxidationreductive reactions, are responsible for the precipitation of iron oxyhydroxy species at the sulphide surfaces, along with pulp dissolved oxygen (DO) scavenging and lowering of pulp electrochemical potential (Eh), leading to poor sulphide floatability.…”