procurement of castable refractory of 1 x 210 mw unit atps chachai. procurement of castable refractory of 1 x 210 mw unit atps chachai. , castable refractory whytheat grade c, nature of bond- hydraulic ;installation - vibration casting ;castable refractory whytheat grade c general properties- max. service temperature -15000c maximum grain size- 5 mm water required for casting 10.5-11.5%;chemical analysis % - typical value- al2o3 -50.50, fe2o3- 1.20, cao- 4.50; physical properties- bulk density-g / cc, after drying at 110°c / 24 hrs-2.17, ccs, kg / cm2 after drying at 110°c / 24hrs-380, after heating at 1100°c / 3 hrs-220, after heating at 1500°c / 3 hrs-610, % retained on max. size-1.0 thermal properties- refractoriness, orton / °c-c+30 / 1665, plc%- , after heating at 1100°c / 3 hrs- -0.15, after heating at 15000c / 3 hrs--1.5, packaging- 25 kg. bags, storage life- 6 months, delivery state- dry , castable refractory whytheat grade a or equivalent- a. chemical composition8- ( i ) al2 o3 --- 91% ( min ) ( ii ) fe2 o3 --- 0.8% ( max ) b. physical composition- ( i ) grain size- 5mm ( max ) ( ii ) refractory - 18200c ( iii ) max service temp - 17850c ( iv ) dry density ( kg / m3 ) 2800 after drying at ( + ) & ( - ) 5% 110c / 24 hrs. ( v ) permanent line change- ( + ) & ( - ) 1% after heating at - ( max ) 15500 c / 24 hrs