Device for detecting the level of the slag in a metal pool
US4880212A · kind A · utility
8Cited by
9References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 26, 1988 |
| Grant date | Nov 14, 1989 |
| Priority date | — |
| Expiry date | Jul 26, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF27D21/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The device has a lance. The lance is moved towards said molten bath level. An antenna is provided at a downward end of the lance for coaction with the slag interface (interfaces), when the lance is moved towards the slag interface (interfaces). A sensitive detection circuit is connected to said antenna. The antenna is during its downward movement capacitively coupled to said slag layer, and the detection circuit detects a predetermined impedance change (predetermined impedance changes) at the antenna provided as it is moved towards the interface (interfaces).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.