Abstract: To achieve the green and efficient comprehensive recovery of quartz and feldspar from lepidolite flotation tail ings,this study systematically conducted process mineralogical analysis and fluorine-free weak-acid flotation tests on a lepido lite flotation tailing sample from Jiangxi Province.Process mineralogical analysis shows that the tailings contain 77.1% SiO2 and 6.9% Na2 O+K2 O,with quartz,albite,and potassium feldspar accounting for 35.3%,44.5%,and 17.8%,respectively.The total proportion of quartz and feldspar exceeds 97%,indicating high comprehensive recovery value.Flotation test results demon strate that using the self-developed cationic collector WIT-1 under the conditions of a grinding fineness of -0.074 mm account ing for 50%,pulp pH of 4.5,WIT-1 dosage of 2.4 kg/t,and sodium hexametaphosphate dosage of 2.2 kg/t,a one-stage roug her and seven-stage scavenger reverse flotation circuit can yield a high-purity quartz product with a SiO2 grade of 99.8% and a feldspar product with a Na2 O+K2 O grade exceeding 9%.This method effectively avoids the equipment corrosion and environ mental pollution issues associated with traditional hydrofluoric acid activation and strong-acid flotation methods,providing a fea sible technical pathway for the green and efficient utilization of lepidolite flotation tailings.

Key words: lepidolite flotation tailings,quartz,feldspar,flotation separation,fluorine-free weak-acid flotation,WIT-1 col lector