Super high- purity magnesite is selected from natural stone by the light burned magnesite, fine grinding, ball, ultra high temperature shaft kiln calcined oil is made mainly for processing of raw materials to produce different particle size of various magnesia refractories are used for production of refined steel open- hearth furnace, furnace bottom and lining Ra mm ing; manufacturing magnesia raw materials, heating, non- ferrous metals such as blowing furnace refractories.