Abstract:

The rough concentrate lithium grade of a lithium mica in Jiangxi is about2.60% after flota⁃

tion，and the product competitiveness is weak. In order to improve the market competitiveness of the lepido⁃

lite concentrate and achieve the requirements of more than 3.0% lithium grade，the magnetic separation and

re-enrichment test of lepidolite rough concentrate was carried out. The results show that under the condi⁃

tions of grinding fineness of -0.074 mm 65%，feed concentration of 25%，magnetic medium rod diameter of

3 mm，background magnetic induction intensity of 1.3 T in high intensity magnetic roughing 1 and back⁃

ground magnetic induction intensity of 1.5 T in high intensity magnetic roughing 2，lepidolite concentrate

with lithium grade of 3.03% and lithium recovery of 82.03% can be obtained by two times of high intensity

magnetic roughing process. The test has achieved the effect of re-enrichment of on-site flotation concen⁃

trate，which can be used as the basis for on-site process transformation.

Key words:

lepidolite, high gradient magnetic separation, re-enrichment