Work included froth flotation, leaching, solvent extraction and stripping tests. Estimates of capital costs and operating costs were made for oxide and sulphide flotation plants and a more complex plant comprising acid leaching, solvent purification...

Investigates the likelihood of mineral concentrates becoming oxidized and liberating toxic sulphur dioxide gas during their transport to Japan. The sample examined is quite stable, but is not representative of the concentrate likely to be produced...