Construction And Pioneer Float Glass Prcessing Machinery and
Equipment
1. Brief Description
The float glass has a flatness surface, excellent optical
performance, no distortions, due to its good quality, the yield
float glass can be used for deep processing fabrication.
Nowadays, the international glass new technology is developing in
the fields of energy, materials, environmental protection,
information, biology. Developing new technology by changing the
external and internal performance of glass product, it allows the
glass product having excellent function of strength, energy saving,
thermal insulation, fire resistance, sunlight protective......etc.
2. Characteristic
Because the glass liquid forms on the metallic tin liquid surface,
it could achieve a high grade double faced fired polishing glass
surface. The parallelism and flatness of float glass are as better
as mechanical polishing effect, but it has a better mechanical
capacity and chemical stability than mechanical polishing glass.
3. Scope of Supply
- Raw material treatment system
- Internal and external cullet system
- Glass furnace
- Tin bath
- Cold end device
- Utlity equipemnt
- Auto control system
4. Raw Materials
Main materials are mainly including:
| Silica Sand |
| Dolomite |
| Limestone |
| Feldspar |
| Soda Ash |
| Salt Cake |
| Cullet |
5. Technical Flow Chart of Float Glass Line
6. Main Equipment Description
6.1 Batch Plant
For batching and mixing the raw materials.
6.2 Furance
The melting tank is key part of glass production line, the
refractory materials quality is very important.
6.3 Tin Bath
Glass liquid float on the metallic tin, through stretching,
forming, polishing and cooling processing, a qualified glass plate
is formed and its temperature reduces around 600°C, the transition
roller will send the plate to annealing lehr.
6.4.Protection Gas Station
In order to overcome the air and oxygen brought through the
entering of the glass liquid and inert gas itself, a center
percentage of hydrogen gas shall be added into nitrogen gas.
Nitrogen gas, a kind of colorless and odorless gas, which is a main
component of protection gas, with a dissociation states in nature.
An inert gas as nitrogen gas, it can not combust in air nor
dissolve in water, which can prevent the oxidization of metallic
tin, and no reaction between nitrogen gas and metallic tin.
Hydrogen gas is a lightest, colorless and odorless combustion gas,
mainly existing under compound state. It is a strong reducing
agent, with min viscosity, high conductivity and strong chemical
activity, which can have chemical reaction with many materials to
produce various kinds of hydride.
6.5. Annealing Lehr
In glass technology, annealing means to put the glass into the
annealing lehr for a certain time or reduce the temperature with a
slow speed, so as to no additional permanent stress or temporary
stress will produce. Namely, annealing also means a process which
will reduce or eliminate the thermal stress of glass.
The purpose of glass annealing is to eliminate the internal
residual stress and optical heterogeneity of float glass in order
to stabilize the internal structure of glass.
Actually, glass annealing process also a cooling process, it need
to control the cooling speed according to different thickness and
requirements. The residual stress in glass after annealing shall
meet the requirement. Meantime, the temporary stress produced
during annealing should not be too much, otherwise the glass will
crack in annealing lehr.
6.6. Colde-end
It mainly divides into three sections for cold-end part in float
glass production line. Details are following:
- Inspection and pretreatment section
- Cutting and break section
- Stacker and packing section
