Processes for preparing various metals and derivatives thereof from copper- and sulfur-containing material

USE OF A RARE EARTH FOR THE REMOVAL OF ANTIMONY AND BISMUTH

METHOD FOR OBTAINING COPPER FROM CUPRIFEROUS ARSENOSULPHIDE AND/OR ANTIMONY SULPHIDE ORES OR ORE CONCENTRATES

Processing of Metal Values from Concentrates

PROCESS FOR RECOVERY OF METAL VALUES FROM MATERIALS CONTAINING ARSENIC AND/OR ANTIMONY