This segment shows the casting of the crown and the fitting of the arch bricks in an electric glass furnace. This Silicon Carbide furnace melts 170-pounds at a cost of approx $12/day in electricity (@$.10/kwh). This is a sample clip from an instructional video set which covers the design and construction of this type of furnace, from beginning to end. See www.mayneislandglass.com.
I did hit one with a glass gather (maybe rods too close to glassline) so I did replace one when the glass dissolved it. If I remember, the rods are 18 inches above the top of the pot. And 3 inches below the lowest part of the angled crown.
MarkLauckner 2 years ago
The heating chamber is about 6 inches clearance from large gathers. And yes, the square chamber enables rods of equal length to be used. The radiant heat is still close enough to heat the entire mass of the investment, the side walls, the pot, and the glass. Probably a total of 800 pounds.
MarkLauckner 2 years ago
why is your ' combustion ' area so big
realize this unit elec so no combustion. just term for area ..
the area above pot could be made smaller if you went round .less space less heat ..round is good for fire ..
guess you need space for sil carbide rods near the crown
interesting vids ..it's -35 below in ak today
furnace is stone cold ...stay warm ...
chena3 2 years ago