Clean and Feasible Utilization of High Silica Fluorspar Powder via Reverse Flotation: A Pilot Study

Fluorite is a nonrenewable mineral used to produce anhydrous hydrofluoric acid (AHF) and aluminum fluoride. The demand for low-grade fluorite powder (CaF2 < 97%) has fallen sharply owing the current market conditions. Therefore, large number of concentrates have been improved by leaching. While this approach can efficiently remove CaCO3 from concentrate, SiO2 content, which significantly affects AHF consumption during production HF or fluoride, cannot be completely removed. To solve problem, in study, we reverse flotation before leaching concentrates. Subsequently, feasibility desilication was determined. obtained results ZP (zeta potential) measurements, solution chemistry analysis, FTIR (Fourier transform infrared spectroscopy) micro-flotation tests indicated that employing dodecylamine as collector citric depressor could effectively separate sericite fluorite. batch experiment pilot test were conducted Chenzhou (Hunan, China) followed their operation Xinyuan Mining Co. Ltd., produces monolithic ore on scale Asia. Notably, found contents both Al2O3 2.82%, 1.17% reduced 1.28%, 0.74% experiment. showed new + technology dramatically reduce potential environmental impact costs, thereby improving economic benefits satisfying requirements market.