Float Glass Temperature Measurement for Optimal Process Control and Product Quality
Float Glass Temperature Measurement is essential for ensuring product quality and process stability throughout the float glass manufacturing line. The raw materials are fed into the furnace, where they are melted at approximately 1500°C. The molten glass then flows through a canal into the tin bath, where it floats like a ribbon on the tin surface. As it moves through the tin bath, its temperature gradually drops from around 1100°C to 600°C.
After exiting the tin bath, the glass enters the annealing lehr, where controlled cooling is applied to relieve internal stresses, prevent cracking, and improve cutting quality. Once properly annealed, the glass is cut by machines and transported.
Critical zones for accurate temperature measurement include the working tank, canal, tin bath, and annealing lehr.
Working Tank
Recommended Pyrometer : 450 G2
Process Temperature : 1500°C
Canal
Recommended Pyrometer : 450 G2
Process Temperature : The temperature must be minimum 1100°C before entering the Bath.
Tin Bath
Recommended Infrared Pyrometer : AL390
Process Temperature : Starting at 1,100°C and leaving the float bath as a solid ribbon at 600°C.As the glass flows down the tin bath temperature reduces down to 600°C
Installation of the Infrared Pyrometer : AST Infrared sensors should be mounted above the Tin bath
Annealing Lehr
Recommended Infrared Pyrometer : AL514
Process Temperature : 100°C-800°C
Installation of the Infrared Pyrometer : AST Infrared sensors will be mounted at the top across the Lehr at equal locations.