A HYDROMETALLURGICAL PROCEDURE FOR EXTRACTING ZINC AND COPPER AND RECOVERING LEAD AND PRECIOUS METALS, MAINLY SILVER, OF ZINCIPHER SULFID MATERIALS

摘要

The extraction of zinc and copper and the recovery of precious metals from sulphurous zinciferous materials, also containing iron, becomes possible when these are treated by leaching under pressure in two stages, by judiciously controlling the relative quantities of sulphurous materials and acid.