Glass-Making at 2000°C

JSGT 1944 V28 T105-T112

Types of furnaces are described for the sm92all-scale melting of glasses of low thermal expansion coefficient and requiring very high temperatures to melt them. The types described include two with tungsten grid-heating elements and two small glass-tank furnaces. The first of the tank furnaces was heated by oxy -coal gas with a burner of special design, the body of the furnace being built of zircon blocks. In the second and improved type of small tank furnace, heat was supplied by tungsten-rod electrodes immersed in the glass as well as by a single oxycoal gas burner. The temperature of operation ranged between 1800°C and 2000°C, the upper limit being controlled by the stability of the refractory zircon blocks of which the tank was built.

J. H. Partridge & O. Adams