Ask The Experts
Ask The Experts—Extraction of micro gold from black sands
October 2011 by Chris Ralph
I know big mining companies use cyanide and other leach systems to recover gold from ore. Is this the only economically feasible way to recover the values?Warning: mysqli_num_rows() expects parameter 1 to be mysqli_result, boolean given in /var/www/vhosts/icmj.com/httpdocs/magazine/article/index.php on line 254
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