Daim ntawv thov:Nws tuaj yeem siv rau hauv kev ua haujlwm ntub dej - 1.2 hli (- 200 mesh ntawm 30 ~ 100%) liab ore (hematite thiab limonite, siderite, thiab lwm yam), manganese ore, ilmenite, chromite, tungsten ore thiab lwm yam tsis muaj zog hlau nplaum, thiab metallic minerals, xws li quartz, feldspar, nepheline ore, kaolin tshem tawm impurity hlau thiab purification.