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Topic: energy for extraction of copper chromium and calcium??  (Read 4125 times)

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telle_star

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energy for extraction of copper chromium and calcium??
« on: March 18, 2006, 07:42:54 AM »
 ???hi all, I'm still keeping on with this assignment and was wondering if anyone would know where to find the energy required for the extraction of copper, chromium and calcium?
I already have 30 – 40 million btu/tonne for copper if that makes any difference.
Thanks heaps for your help :D
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