Separation of Olivine Crystals and Borate Containing Slag from CaO–SiO<sub>2</sub>–B<sub>2</sub>O<sub>3</sub>–MgO–Al<sub>2</sub>O<sub>3</sub> System by Utilizing Super-Gravity

The olivine crystals and borate containing slag were effectively separated from the CaO–SiO2–B2O3–MgO–Al2O3 system at an optimum precipitating temperature of olivine by utilizing super-gravity. The borate containing slag melt went through the filter, whereas the olivine crystals with a larger size of 300 μm–2500 μm were intercepted by the filter. Consequently, after super-gravity separation with G=900 at 1463 K for 5 minutes, the mass fraction of B2O3 in separated borate containing slag was 30.17 wt%, while that of the separated olivine was only 0.009 wt%, and the recovery ratio of boron in separated borate containing slag thus was up to 99.97%.