Tender For tender for supply of procurement of boiler refractory materials from hqwnc nominated indigenous firms : : - clay refractory p g a , fire brick triangular s100 , bracket for brick fixing , cord silica sh kh 212 , item silicon carbide for tuyeres d180 , item silicon carbide for tuyeres d280 , pin d12 l 80 , lignosulfonates industrial solid l ctt , mortar chamotte m sh 39 , item silicon carbide triangle 125 125 mm