Level measurement in electromagnetic continuous casting

Level measurement method of molten metal have been investigated to apply in the electromagnetic continuous casting. The level measuring principle was based on the electromagnetic induction and search coil type of magnetic sensor was chosen as a level sensor, Before construct the level meter, the artificial cold charges was used to characterize the sensor output according to the level, the coil current, and the aging. Considering the results of basic experiments, we constructed a level measurement system and applied it to electromagnetic continuous casting at a billet caster of POSCO works. The developed level meter showed that the resolution of the level was within ±0.3 mm, the dynamic range of sensing was from the top of the mold to 300 mm below the top of the mold. It worked well with the existing control device in supplying the molten steel to the mold.