The use of mica schist from Indonesia as raw material for lithium extraction process using sulfate roasting and acid leaching

Lithium minerals become a sub-economic raw material for lithium production to fulfill the demand. This study is about extraction from mica schist using roasting and leaching processes. The located in Kebumen, Indonesia was used phenomena during process. Sodium sulfate as agent while 0.36 M sulfuric acid agent. Solid/liquid ratio (1:5, 1:10, 1:15 1:20 (g/mL)) time (30, 60, 90 120 minutes) were variables this study. process done at 700 °С 40 minutes 70 350 rpm. of additive 1.5:1 (g/g). XRD, ICP-OES, SEM observe formed compounds, chemical composition morphology materials. HighScore Plus (HSP) interpret content each compound schist, roasted residue. ICP analysis confirmed that contains 45.28 ppm lithium. It supported by XRD exists lepidolite (KLi2AlSi4O10(F,OH)2). Sulfate did not affect type but reactivity against shows reduced average particle size 32.17 27.16 µm. concentration 1.27 ppm. optimum result 97.66 % solid/liquid 1:5 (g/ml) 30 minutes. HSP contents initial residue 60.6; 24.3 18.7 %, respectively. according 1.06