Fireproof ceramic ball 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 We may act according to the customer the request manufacture. Main performance indices: Item Compression resistance Soften temperature with weight Fire resistance Void volume Thermal shrinkage Al2o3 content Bulk density Index ≥500kg/cm2 ≥1450℃ ≥1770℃ ≤21% ≤0.1% 55-75% 2.5-2.8 T/m3