- Carry over from
regenerators
- Crown dripping
(Silica)
- Flux line wear
- Contaminated batch
(normally cullet)
- Ingress of batch dust
frit dust into
forehearths and
working end
- Foreign materials
passing through
combustion and
cooling systems
(filter failure)
- Failed channel joints
or rat holes
exposing insulation
to molten glass
- Condensate from
exhaust stacks /
damper blocks
|
- Furnace pull too high
- Bubbling rate incorrect
- Electric boost levels
incorrect
- Electrode failure
- Large variation
in tank pull
resulting in
disturbance of
stagnant glass
- Batch composition
- Lack of adequate
refining agent
|
- High furnace pull
- Large variations
in furnace pull
- Batch Composition
- Cullet size
- Raw material grain size
- Poor Batch charging
|
