21st Century
Mining for
K-12 Educators

Mineral processing – Recovery of metals from the rock

Chemical Methods of Concentration - Gold Ore Processing


If the economic mineral is fine enough, physical methods such as gravity will not work.  In the case of very low grade gold deposits, the gold occurs in “no-see-um” sizes.  In this case the rock in which the mineral occurs is chemically treated to dissolve the economic mineral, the solution in which the mineral is contained is then treated to recover the mineral in a saleable form.  This lecture discusses the “in’s and out’s” of gold recovery by chemical methods of concentration.

Educators who wish to use portions of these free online lectures are welcome to do so as long as credit is given to CMAEF for its content.

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