The tank and throat cooling are designed to cool by means of permanent and uniform air or water flow (throat). The areas of the glass furnace, which have to be cooled, run the risk of damage from over-heating and/or increased corrosion. This would result in a significant reduction in the lifespan of the furnace and increases the risk of tank leakage. The HORN^® tank and throat cooling equipment is designed with special nozzles for precise metal line cooling, thus reducing corrosion of the tank blocks and enabling a longer lifespan.

The cooling takes place via different fans, which extract air from the environment and transport this air through pipelines to the point which has to be cooled. For the tank and throat cooling, two to six (depending on the furnace size) cooling fans are normally used, whereby one of the fans is always designed as a stand-by fan in case one of the other fans is damaged.

The cooling air outlet nozzles are mounted on the exact level of the glass metal line, as the corrosion of the refractory material is the highest at this point. Additional spare ports are also provided at the metal tubes to supply additional cooling positions.