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<p>[QUOTE=&quot;RabidRick, post: 1996674, member: 37868&quot;]Circulated copper for bullion? Or high grade / errors?</p><p><br /></p><p>As far as bullion, where would you put them? I think they also made a law you can&#039;t melt US coinage for bullion but they should probably just get rid of the penny. It&#039;s stil costing us 3.5c for each copper-plated zinc.</p><p><br /></p><p>If you had a bulk method of extraction (some ideas come to mind) and don&#039;t mind all the weight you could probably make profit off scrap. You&#039;d have to work out the numbers and inlude gas, storage (if applicable) average yeild and supply sources. You can probably stil get bags from the bank which cost nothing.</p><p><br /></p><p>Then you would need a rolling machine and supplies or bringing them back would be impossible. You ould always do it on a small scale first but unless you&#039;re going to pick through bags Id&#039; come up with a separation mechanism based on either weight or chemical composition. You could probably just throw it into some liquid with the right viscosity but it&#039;s metal so you wouls need something with a high specific gravity. If that doesn&#039;t work, you might be able to play around with the fact that copper + HCl gives off H2 and zinc, zinc oxide. H2 is lighter. You don&#039;t want to completey strip the plating through, or blow yourself up (H2 isn&#039;t something to play with unless you have a good lab background.</p><p><br /></p><p>Why am I rambling? This has been done before I&#039;m sure it&#039;s in Google or patents.</p><p><br /></p><p>There&#039;s also melting point but that&#039;s probably pretty high. If I recall though, zinc is pretty far up there. You&#039;d have to check.[/QUOTE]</p><p><br /></p>

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