Bubble tubes made of Technical Ceramics

DEGUSSIT AL23 with the longest lifetime

DEGUSSIT AL23 has proved its worth time and again in the glass industry. Bubble tubes, used in glass melting tanks for the purpose of efficient process design, are just one example of all demanding applications for our high-performance ceramics.

Bubbling initiates the formation of a so-called convection current ensuing from the gas bubbles rising from the bottom of the melting tank. This ensures that “cold glass” from the bottom of the melting tank is again transported to the surface. Refinement and homogenization of the glass melt is thus accelerated, resulting in higher melting efficiency. The creation of air bubbles and/or a complete air-bubble curtain at the end of the tank melting zone is carried out by means of a row of bubble tubes inserted from the base of the tank by means of borings in the hearth blocks, transverse to the tank axis. These bubble tubes are made of DEGUSSIT AL23 aluminium-oxide ceramics.

As the bores are small in diameter, any infiltration and cooling of the glass melt in the ceramic tube is excluded. The system is designed in such a way that, in case of wear on the tube tips, the bubble tubes can be inserted further into the hearth block.

DEGUSSIT AL23 provides the following benefits:

  • High-temperature resistance
  • Corrosion resistance
  • High dielectric strength
  • Good thermal conductivity
  • Good thermal shock resistance
  • Long lifetime
Bubblingrohr Bubble tube for the glass industry
Material: Aluminium Oxide (Al2O3) DEGUSSIT AL23