Magnesium oxide recovery

摘要

A process of recovering magnesium oxide from a source of magnesium sulfate includes the steps of providing a source of magnesium sulfate in solution that is derived from part of a process that is associated with the leaching of a metal containing ore or concentrate; converting the magnesium sulfate in solution to solid magnesium sulfate; contacting the solid magnesium sulfate with elemental sulfur in a reducing atmosphere; and recovering the magnesium as magnesium oxide, and the sulfur as sulfur dioxide gas.