To understand the aqueous species important for transport of rhenium under supercritical conditions, we conducted a series of solubility experiments on the Re–ReO2 buffer assemblage and ReS2. In these experiments, pH was buffered by the K–feldspar–muscovite–quartz assemblage; fO2 in sulfur-free systems was buffered by the Re–ReO2 assemblage; and fO2 and fS2 in sulfur-containing systems were buf...

Water quality affects the flotation recovery of minerals and their separation. Mining-process waters become saturated with soluble salts after contact (oxidation dissolution) during crushing, classification flotation. Inorganic species, such as metal ions but also carbonate sulphate ions, may have a positive or negative effect on mineral As are always found in high concentrations process waters...