... . Our products mainly include insulating brick, refractory brick, refractory castable, ceramic fiber products. For insulating brick, the production capacity is 300tons ... , USA, ITALY, TURKEY,AFRICA etc.JM insulating brick, using high pure mullite as raw material, is made by adding alumina ... (%)Al2O33758677377Fe2O30.70.70.60.50.4comm size230x114x75/65mm Lightweight Mullite refractory brick (JM-28)