ball mill for copper ore grinding -
South Mill are called SAG (semi-autogenous grinding) mills and ball mills. Only then are the copper minerals broken free of the rest of the rock to be separated by flotation. Read More. Concentration of Britannia Ores, H A Pearse - Britannia Mine Museum. Summary of the Concentrating Process in Mill No. 3 At Britannia the copper ore contained just over 1% copper (though in the early