Method of and apparatus for determining the melt level in a continuous-casting mold
US4441541A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 11, 1982 |
| Grant date | Apr 10, 1984 |
| Priority date | — |
| Expiry date | Mar 11, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D11/186
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The level of a melt in a vertically reciprocating continuous-casting mold is detected by a method wherein a nonhomogeneous steady magnetic field is formed extending horizontally through the mold into the melt generally at the melt level. This field is vertically reciprocated jointly and synchronously with the mold and its field strength is detected at a sensing location after the field passes through the mold. This location is also vertically reciprocated jointly and synchronously with the mold. The melt level is derived from the detected field strength, normally taking into account melt conductivity and relative displacement rate of the mold and melt. With the use of a steady field the effect of the mold is automatically eliminated as the field does not move appreciably relative to the mold, so it generates virtually no eddy currents in it that would generate secondary fields.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.