Some industrial measurewere summarizedto prevent both the segregation and the cracks to form.

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Molten metal flow control using linear induction motor is expected much t o be a new revolutionary basic technology t o realize high quality and low cost processes. We report an experiment with fused metal(me1ting point : 45 " C ) and lOOkg molten steel. According t o the fused metal experiment, t h e linear induction motor has a good ability for stopping and acceleration as well as braking of metal flow. However, the electromagnetic force to be able t o stop the metal flow in vertical arrangement is several times larger than the one in horizontal arrangement because of the liquid metal effect. A resonance condenser is useful t o reduce the required power source capacity. Therefore, t o control the molten metal flow, voltage(current) regulation is superior t o frequency regulation. Though the large air gap also makes the electromagnetic force reduced, a conductive shorting bar( Z,B, ), installed inside the non-conductive firebrick, increases the electromagnetic force.

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