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ENVIRONMENTAL ENGINEERING . Recovery of tin and copper by recycling of printed circuit boards from obsolete computers . L. A. Castro; A. H. Martins*
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As if I needed yet another hobby, I got interested in gold prospecting several years ago. My travels around the West often took me to old mining towns and mine sites ...
In the field of extractive metallurgy, mineral processing, also known as ore dressing, is the process of separating commercially valuable minerals from their ores.
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