copper ore gold ore extraction equipment with durable using life

Jul 01 2012 For a base case ore grade of 35 g Aut ore the life cyclebased environmental footprint of gold production was estimated to be approximately 200000 GJt Au 18000 t CO 2 et Au 260000 t watert Au and 1270000 t waste solidst Au for nonrefractory ore The embodied energy and greenhouse gas footprints were approximately 50 higher with