Gusaba:Ikoreshwa cyane mubyuma bya spiral classifier minerval yunguka yubutare bwibyuma byamabuye yubunini, kandi birashobora no gukoreshwa mugukuraho ibyondo namazi mugikorwa cyo koza amabuye, akenshi bigakora inzira yumuzingi ifunze hamwe n urusyo rwumupira.