Dear Sir, good day! We buy copper Cu, lead Pb, Gold Au, Silver Ag, Nickel Ni, Tungsten W, Molybdenum Mo, Cobalt Co, Tin Sn bearing ore, concentrate, residue, scrap material in long term, details as following: sludge, spent catalyst, ash, Cu%>6% slag, ash Pb%>15% Au residue Au>10PPM Ag Ag>500PPM ...
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