| 摘要 |
<p>A system for removing non-metallic inclusions in molten steel composed of a tundish and a coil device, wherein the tundish is an intermediate vessel that receives molten steel from a ladle, cleans the same by removing non-metallic inclusions therein, and feeds molten steel so cleaned into a mold. In order to remove non-metallic inclusions, the tundish has a circulation tank and a floating tank. A coil device is provided around the circulation tank of the tundish for circulating molten steel in the circulation tank. The tundish and the coil device are separate bodies, and are constructed so as to move relative to each other. Molten steel in the circulation tank of the tundish is circulated in a horizontal direction by virtue of the magnetic field generated by the coil device and is formed to have a parabolic, concaved surface so as to force non-metallic inclusions in the molten steel to float to the parabolic, concaved surface of molten steel for removal with a suitable means. Molten steel so cleaned flows from the circulation tank into the floating tank, where non-metallic inclusions still remaining in so-cleaned molten steel float in a calm current therein. Molten steel cleaned therein is then poured via the bottom portion of the floating tank into a mold. Since the tundish and the coil device are separate bodies, coil devices can be fewer than tundishes, resulting in lower equipment costs, and easier and less-time-consuming operations in replacement and repair of tundishes.</p> |
