Brand Index LR-DHL-78 LR-DHL-83 MgO(%) â?¥78 â?¥81 CaO(%) 12~16 8~12 Fe2O3(%) 4~6 4~6 Grain Size (mm) 0~6 Compressive strength (MPa) 1300�ºC �? 3h â?¥10 1600�ºC �? 3h â?¥35 Permanent linear change rate after burning % 1300�ºC �? 3h 0~ -0.5 1600�ºC �? 3h -1~ -3.0 Application Used for ramming the bottoms and slopes of EAF Advantage:Our furnace bottom ramming material has high density, high strength, high corrosion resistance, high thermal resistance and volume stability. Application: They are widely used for ramming the bottoms of UHP electric furances , HP electric furances , RP electric furances , DC electric furances and iron alloy electric furances.