複数塩類鉱物を懸濁する水溶液系における液相および固―液界面性状 蛍石，方解石が共存する場合

Abstract

Studies were made on a binary minerals-aqueous solution system using fluorite and calcite. The concentrations of mineral constituent ions in the supernatant were measured. Flotation tests were carried out. A special apparatus and method developed to simulate real flotation in a plural minerals system were used. Zeta potential measurements were performed using a new apparatus designed to measure the zeta potential of individual powder samples in an aqueous solution containing plural samples.All results obtained in the binary minerals system differed from those in the singular mineral systems. The difference was caused by the effect of the ionic species dissolved from both minerals in the aqueous solution. This was interpreted in terms of the surface precipitation and/or surface reactions between both minerals and the dissolved ionic species. The results of chemical thermodynamic calculations showed that the fluorite phase was more stable than the calcite phase below pH 8.4-9.3, where the calcite surface in the binary minerals system became similar to that of fluorite. Above this pH range, the reverse phenomenon was observed.