Vanadium-bearing shale beneficiation pre-enrichment: Selective flotation separation of garnet and quartz in an acidic environment using a dodecylamine–sodium fluosilicate system - Siqin Zhu; Guohua Ye; Qi Zuo; Xuanxiong Kang; Yun Zhang; Xinyue Xiang; Yiyang Rong; Changxu Song (Minerals Engineering, 2025)