... , main screening efforts for 50, 80, 100, 120, 150, 200, 325 mesh, etcFlack graphite purposes1. As non-metallic mineral resources, has important ... (<=%)remains on sieve(<=%)lg-325-85852.512.51.020lg-325-86862.511.51.020lg-325-87872.510.51.020lg-325-88882.010.01.020lg ...