| 摘要 |
PURPOSE:To adjust flow rate with high reliability by forming a magnetic flux by superconductive coils perpendicularly to a pouring nozzle having a throttling part and controlling the excitation current thereof. CONSTITUTION:A pouring nozzle 3 has the throttling part which increases the flow rate of a molten steel 1 and is disposed with superconductive coils 4a, 4b which form a magnetic flux in the direction perpendicular to the flow of the molten steel 1. The excitation current of the coils 4a, 4b is controlled by a power source device 8. The braking force proportional to the product of the square of the magnetic flux density B and flow rate Q acts in the direction opposite from the flow direction of the molten steel 1. If the excitation current of the power source device 8 is controlled, the braking force of the steel 1 is controlled and therefore the amt. of the molten metal is adjusted without contact. The reliability of the adjustment is thus improved and automation is made easy. |
