Glass Processing, Melting Furnace For Glass Industry, Manufacture
1. Brief Description
Glass is a special amorphous inorganic nonmetallic material. The
main component is silicate, a non-crystalline solid with an
irregular structure.
Glass furnace is a melting device, which is the most necessary and
important equipment for the glass industry.
The melting process is divided into five stages as following, each
section has its inner connection, affecting each other. If one
stage has imperfect performance, it will influence the next stage,
and ultimately affect the quality of glass.
Physicochemical changes in each glass melting stage:
Silicate forming
In this stage, the components of batched materials will produce a
physicochemical solid phase reaction during heating process, in
which the gaseous products will be released from the batched
materials and produce a new opacity sinter ultimately, which is
formed by silicate and SiO2.
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.
2. Type of Furnace
Capacity
| Small scale furnace | Daily furnace capacity: below 50tons |
| Medium scale furnace | Daily furnace capacity: 50tons~150tons |
| Large scale furnace | Daily furnace capacity: 150tons plus |
Heating source
Fired furnace | The combustion fuel can be natural gas, heavy oil, diesel oil…… for
this kind of furnace. |
Electric furnace | Electricity is the fuel for this kind of furnace. |
Fired-electric furnace | This kind of furnace is mainly using combustion fuel, electricity
is used as a supplementary heating source. |
3. Furnace structure
According to current fired furnace structure, it is mainly divided
into four parts:
- Glass melting section
- Heat source supply section
- Waste heat recovery section
- Gas supply and waste gas exhaust
Melting section:
It is the part which melts batched materials and Clearing and
homogenizes glass liquid. In the upper space of the melting section
is referred to as the flame space, the lower part is melting tank.
The flame comes from the burner through the port, which feds in
preheated air
to increase the flame effiency.
Pre-combustion room
After the air and gas flow out from the access, under the airflow
vortex motion, and molecule diffusion and collision, the air and
gas will mix before flowing into the furnace.
4. Furnace melting technology system
Reasonable melting technology is a system which could ensure a
normal daily production. It will have an important function for
high production, high quality, low consumption and furnace
campaign.
Furnace melting technology includes temperature, pressure,
bubbling, glass liquid level, fuel, reversing system etc.
Temperature
The temperature means the temperature the of melting tank, not the
whole furnace. The distribution of temperature is from the melting
tank through the length of the furnace.
Pressure
Furnace pressure is the static pressure of the gas system, which is
determinate by pressure distribution curve.
Bubbling
Stable shape and position of bubble are an important sign to
estimate the melting performance, which will also affect the
production capacity of furnace and quality of glass liquid.
6. FAQ
Q: What does JEFFER do?
A: JEFFER Engineering and Technology Co., Ltd is a professional
engineering company specialising in project design, engineering
technology consulting, engineering, procurement, construction
(EPC), and project operation management.
Q: Can you custom the product?
A: Yes, we design the production line based on the requirement of
the client.
Q: How do you control the quaility?
A: All our processes are strictly combined with ISO standard. And
our professional team will supervise the quality control during the
design and manufacture.
Q: Can you offer design service?
A: Yes, we could design full solution plan as per the requirements
of the client.
Q: Do you offer installation on site overseas?
A: Yes, we can provide our engineer to supervise the installation
work on site or provide the the whole installation team on site to
finish the project.
