System for removing non-metallic foreign matter in molten metal
US5429655A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1992 |
| Grant date | Jul 4, 1995 |
| Priority date | — |
| Expiry date | Nov 20, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D11/11
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An apparatus for removing non-metallic foreign matter in a molten steel includes a tundish and a coil device. The tundish is an intermediate container receiving the molten steel from a ladle and feeding a purified molten steel by removing the non-metallic foreign matter in the molten steel. For removing the non-metallic foreign matter, the tundish has a swirl flow bath and a floatation bath. In the circumference of the swirl flow bath of the tundish, a coil device is arranged for flowing the molten steel in the swirl flow bath in swirl fashion. The tundish and the coil device are formed separately and constructed for relative movement to each other. The molten steel in the swirl flow bath of the tundish is flown in swirl fashion in the horizontal direction by a magnetic field generated by the coil device. At this time, the molten steel forms a parabolic concaved surface. The non-metallic foreign matter in the molten steel is forcedly floated up on the parabolic surface portion of the molten steel, which is removed by an appropriate means. The molten steel thus purified flows into the floatation bath from the swirl flow bath. With the static flow in the floatation bath, the residual…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.