PROCESS DESCRIPTIONRaw materials of batch generally stored in silos. The major component are sand, glass cullet and frit, minor components are Borax, Dolomite, Alumina Hydrate, Limestone. Based on the recipe these components charged into the mixer in a pre-defined order to eliminate separation. The mixed batch than transported to the batch charger – usually pusher or screw type – next to the furnace. The batch is melted at temperatures of 1380 - 1450°C in a tank furnace what can be all-electric, air-fuel or oxy-fuel fired, with or without electric boost. Melted material is conditioned in a refiner on 1150 - 1200 °C before distributed to the fiberizers through the forehearth / feeder channels (1120 - 1175 °C).