To accommodate casting speeds of 13 meters (42 feet) per minute or more and accurately control metal flow rates of up to 60 tonnes per hour, Hazelett has adopted the EMLI® system, which was originally developed by the Swedish Atomic Energy Commission, for sensing the pool level in the caster. A proportional signal is provided, which actuates the stopper rod to control metal flow from the lower launder into the tundish. Casting speed is held constant and the caster can be run in a completely automatic mode. The caster pool position, which is displayed on the Interaq™ process control panel, can be held within +/- 2.5 mm along the belt using this system, which is a significant improvement compared to manual or optical control.

Sending and receiving coils are mounted within the water cooling area behind the belts. The AC low frequency flux is attenuated by the molten metal between the coils providing a precise indication of the molten pool level.

*EMLI is a trademark of Metal Process Control, Inc.

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