Ohun elo:O le ṣee lo ni sisẹ tutu - 1.2 mm (- 200 mesh ti 30 ~ 100%) pupa pupa (hematite ati limonite, siderite, bbl), irin manganese, ilmenite, chromite, tungsten ore ati awọn iru miiran ti awọn ohun alumọni oofa ti ko lagbara, ati awọn ohun alumọni ti fadaka, gẹgẹbi quartz, feldspar, nepheline ore, kaolin fun yiyọ irin aimọ ati mimọ.