Method for determining molten metal pool level in twin-belt continuous casting machines

Patent · Tue Mar 21 00:00:00 EST 1989

OSTI ID:866881

Kaiser, Timothy D ^[1]; Daniel, Sabah S ^[2]; Dykes, Charles D ^[3]

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1. Colchester, VT
2. Pittsburgh, PA
3. Milton, VT

A method for determining level of molten metal in the input of a continuous metal casting machine having at least one endless, flexible, revolving casting belt with a surface which engages the molten metal to be cast and a reverse, cooled surface along which is directed high velocity liquid coolant includes the steps of predetermining the desired range of positions of the molten metal pool and positioning at least seven heat-sensing transducers in bearing contact with the moving reverse belt surface and spaced in upstream-downstream relationship relative to belt travel spanning the desired pool levels. A predetermined temperature threshold is set, somewhat above coolant temperature and the output signals of the transducer sensors are scanned regarding their output signals indicative of temperatures of the moving reverse belt surface. Position of the molten pool is determined using temperature interpolation between any successive pair of upstream-downstream spaced sensors, which follows confirmation that two succeeding downstream sensors are at temperature levels exceeding threshold temperature. The method accordingly provides high resolution for determining pool position, and verifies the determined position by utilizing full-strength signals from two succeeding downstream sensors. In addition, dual sensors are used at each position spanning the desired range of molten metal pool levels to provide redundancy, wherein only the higher temperature of each pair of sensors at a station is utilized.

• Assignee: Hazelett Strip-Casting Corporation (Colchester, VT); USX Corporation (Pittsburgh, PA)
• Patent Number(s): US 4813471
• Application Number: 07/190,364
• OSTI ID: 866881
• Country of Publication: United States
• Language: English

Related Subjects

method
determining
molten
metal
pool
level
twin-belt
continuous
casting
machines
input
machine
endless
flexible
revolving
belt
surface
engages
cast
reverse
cooled
directed
velocity
liquid
coolant
steps
predetermining
desired
range
positions
positioning
seven
heat-sensing
transducers
bearing
contact
moving
spaced
upstream-downstream
relationship
relative
travel
spanning
levels
predetermined
temperature
threshold
set
somewhat
output
signals
transducer
sensors
scanned
regarding
indicative
temperatures
position
determined
interpolation
successive
pair
follows
confirmation
succeeding
downstream
exceeding
accordingly
provides
resolution
verifies
utilizing
full-strength
addition
dual
provide
redundancy
station
utilized
metal casting
signals indicative
coolant temperature
continuous casting
temperature levels
threshold temperature
liquid coolant
output signals
molten metal
output signal
predetermined temperature
molten pool
transducer sensors
pool position
method according
metal pool
continuous metal
desired range
casting machine
casting belt
twin-belt continuous
casting machines
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