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FOR HOT BLAST STOVE FOR EAF ROOF FOR GENERAL USE
Goods No. GHHA65 GHHA55 GHHA48 RHS RH1 RH2 Al75 Al-1 Al-2
Al2O3(%) min 65 55 48 80 75 65 75 65 55
Refractoriness( ) min 1790 1770 1750 1850 1800 1790 1790 1790 1770
Refractriness under load 0.2 Mpa( ) 1500 1470 1420 1550 1530 1520 1520 1500 1470
Apparent porosity (%) max _ _ _ 19 19 22 23 23 22
CCS (MPa)min 49 44.1 39.2 78.5 68.6 58.8 54 49 44.1
Shrinkage after reheating 1500x2h (%) max +0.1-0.4 +0.1-0.4 +0.1-0.4 +0.1-0.4 +0.1-0.4 +0.1-0.4 +0.1-0.4 +0.1-0.4 +0.1-0.4