High Effecient, Electric Heating Glass Furnace, Customized And
Design
1. Brief Description
Glass was used for windows and doors by the Ancient Romans as early
as the 4th century.
In 1902, Voelker was granted a basic patent for melting glass using
the heat generated by an electric current through the batched
material. Under the continuous development and improvement of the
furnace design technology and electrode, this electric melting
method is extensively used.
Between the year 1920 to 1925, Raeder from Norway used graphite
electrode for furnace, which has successfully achieved a fully
electric furnace.
In 1925, Corneljus from Sweden took this kind of electric furnace
to produce amber glass and green glass. The electric melting
furnace adopts the method of blanket charging and the batching
material floats on the surface of glass liquid
Glass melting is the most important process in glass production, it
is a forming process where the batched materials form a qualified
liquid evenly with no bubbles under high temperature heating.
Glass liquid forming
In this stage, the sinter will be melting and the silicate and SiO2
in sinter will change to flint glass liquid with a plenty of
bubbles. However, its chemical components and character are not
even.
Clearing
The glass liquid is continuously heated, and its viscosity is
reduced with plenty of gaseous sundries released, which should
eliminate the visible bubbles with the pool of liquid.
Homogenization
The glass liquid is kept at high temperature for a long time, the
ripple eliminates by diffused function and homogenizes as a whole.
The temperature of homogenization can be lower than the clearing
stage.
Glass melting is a very complex process, it includes physical,
chemical and physicochemical phenomena and reaction. These
phenomena and reaction lead the mechanical mixed raw materials to
complex melting glass liquid.
2.Advantages of the electric melting:
- High thermal efficiency, up to 80%~85%
- More energy saving
- Small footprint
- Simple structure
- Reduce the volatilization of expensive oxide in raw materials
- Stable melting technology
- No pollution
- Lower noise level
- Improved working condition
- Homogenized glass liquid
- High product quality
- Automatic control
- Less maintenance cost
3. Furnace structure
Melting tank |
Throat |
Forehearth |
Spout |
4. Melting section of electric furnace
Using cooling top vertical melting type theory, which will
concentrate the melting process. The design of melting area is
benefited for glass melting and homogenization, no death zone in
melting scope, that will ensure the melting efficiency of glass
materials and clarification, producing high quality glass liquid.
Adopt electric fused cast AZS materials for melting and non-melting
areas, clay brick, light clay insulation brick and aluminum
silicate products for other parts.
