HYDROMETALLURGISKT FOERFARANDE FOER EXTRAHERING AV ZINK OCH AOTMINSTONE EN DEL AV KOPPARN OCH UTVINNING AV BLY OCH SILVER UR ZINKINNEHAOLLANDE SVAVELHALTIGA MATERIAL.

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.