Fireproof ceramic ball can be divided into ordinary ceramic ball and high alumina ceramic ball.The ordinary ceramic ball is suitable for the translater and converter in sulphuric acid and fertilizer industries.And the high alumina one fit for hot air furnace,heating & converting furnace and other devices in used and steel industries. Fire resistance℃ ≥1770℃ Void volume ≤21 Thermal shrinkage ≤0.1%