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<p>[QUOTE=&quot;-jeffB, post: 3870113, member: 27832&quot;]I&#039;m not so sure about that. The vast majority of copper is used to make wire and tubing, and both of those are most often 99+% pure copper. You can&#039;t turn 95% copper into 99+% copper by <i>adding</i> metals, except of course more pure copper.</p><p><br /></p><p>I&#039;m not a metallurgist, certainly not a refinery chemist, but I&#039;d think that once you&#039;ve melted the metal, blowing air through it to carry out the zinc would be a no-brainer. Copper&#039;s melting point (1984°F/1085°C) is a good bit higher than zinc&#039;s <i>boiling</i> point (1665°F/907°C). As refining processes go, this one looks pretty easy.[/QUOTE]</p><p><br /></p>

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