Surface Electrical Behaviors of Apatite, Dolomite, Quartz, and Phosphate Ore

Abstract

The phosphate ore flotation is achieved through the surface electrical behavior difference among apatite, dolomite and quartz, but it is usually affected by the dissolved ions from pulp, especially Ca 2+ and Mg 2+ . The zeta potentials of apatite, dolomite, quartz, and phosphate ore in different solutions were measured to discuss the surface electrical behaviors of them in this study. It was found that the apatite, dolomite and phosphate ore supernatants have limited impact on the zeta potentials of the respective surfaces themselves, but the surface electrical behaviors of apatite and dolomite in the supernatant of the other is similar to the supernatant mineral source. This will increase the separation difficulty of apatite from dolomite in the phosphate ore flotation process. The negative zeta potentials of apatite, dolomite, quartz and phosphate ore increase in the presence of Ca 2+ and Mg 2+ . Moreover, a more zeta potential increase in presence of Ca 2+ than Mg 2+ was investigated, suggesting a stronger influence of Ca 2+ than Mg 2+ on the surface electrical behaviors of ores.

Electrokinetic Forces as an Electrical Measure of Chemical Aging Potential in Granular Materials

“…The ZP analysis shows consistent results with the state of the art based on the dependence on the variation in the pH of the colloidal solution fluid, as presented by several authors [20,21,43,59]. Moreover, the ZP analysis exhibited consistent trends with α quartz structures (Qz) predominant in the white representative fraction under study, with no isoelectric points (IEP) and more negative values with the increase in pH in the whole range from 3.0 to 11.0 [60,61]. Moreover, the values obtained in the study of the ZP showed negative values between −12 mV and −19mV under increasingly acidic conditions (pH 5.0) and more negative values with the increase in pH (concentration of OH − ) up to 11, as presented in Figure 7.…”

Interaction Behavior between Coarse and Fine Particles in the Reverse Flotation of Fluorapatite and Dolomite

“…Thus, zeta potentials were measured to study the surface charges of dolomite and fluorapatite samples, and the results are listed in Figure . The isoelectric point (IEP) of pure fluorapatite was between pH 5.0–6.0, while that of dolomite was also around pH 6.0–7.0, consistent with previous studies. , It can be seen from Figure that the addition of NaOL caused a significant shift in the potential at the same pH, indicating that NaOL had adsorbed on the surfaces of dolomite and fluorapatite. The potential became more negative in the presence of NaOL, and was also higher than that without NaOL.…”

CO₂ bubble formation on dolomite surface and its influence on surface wettability and flotation of dolomite

“…Approximately 85% of phosphorus resources in China can be classified as middle-low grade phosphate ore . Typically, this ore contains various gangue minerals such as dolomite, quartz, calcite (Sis and Chander, 2003;Zhou et al, 2020). As a result, the direct utilization of the raw phosphate ore is hindered.…”