초록 ▼

An apparatus for heating glass-forming materials within a delivery conduit extending from an electric glass melting furnace to a connector channel is disclosed. The conduit is made from an electrically conductive refractory metal such as molybdenum and is used to conduct current from inside the furn

An apparatus for heating glass-forming materials within a delivery conduit extending from an electric glass melting furnace to a connector channel is disclosed. The conduit is made from an electrically conductive refractory metal such as molybdenum and is used to conduct current from inside the furnace to its exit end in the channel. Joule effect heating between the exit end of the conduit and an electrode in the connector channel indirectly causes the glass materials within the conduit to partially melt, to the extent that the materials within the conduit may be exhausted from the conduit. A flange assembly for use with a molybdenum conduit is also disclosed.

대표청구항 ▼

An improved electric furnace for melting and refining glass, including a chamber for containing a bath of molten glass having a bottom wall and an upstanding peripheral wall; electrode means for supplying electrical energy to said bath; and passageway means extending through said sidewall for delive

An improved electric furnace for melting and refining glass, including a chamber for containing a bath of molten glass having a bottom wall and an upstanding peripheral wall; electrode means for supplying electrical energy to said bath; and passageway means extending through said sidewall for delivering molten glass from said bath to channel means for receiving glass, wherein the improvement comprises: said passageway means includes a conduit made from an electrically conductive refractory metal; said channel means includes electrode means; and means for selectively supplying voltage across at least one electrode of said furnace electrode means and said electrode means in said channel means to establish a flow of electrical currents from said at least one furnace electrode to said conduit, through said electrically conductive conduit, and to said electrode means of the channel means, whereby said current flow in said channel means heats the glass therein, and heat transferred therefrom at least partially melts glass-forming materials initially within said conduit.