Gold is also produced by mining in which it is not the principal product. Large copper mines, such as the Bingham Canyon mine in Utah, often recover considerable amounts of gold and other metals along with copper. Some sand and gravel pits, such as those around Denver, Colorado, may recover small amounts of gold in their wash operations.
byproduct of bauxite mining what are the byproducts of producing metals from bauxite. How Aluminum is Produced RocksandMinerals FACT: It takes 4 tons of bauxite to produce 2 tons of alumina aluminum sample The production of the metal Aluminum from the raw ore of Bauxite is a two stage. read more