Means for adding materials to a flowing stream
US4352605A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 1979 |
| Grant date | Oct 5, 1982 |
| Priority date | — |
| Expiry date | Jun 28, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21C7/0043
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Apparatus for adding materials, especially powdered or granular materials, to a flowing stream, e.g. of molten metal, comprises a nozzle for compressed gas, blowing the additive into the stream, and a detector that detects the stream and switches the flow of additive on and off according to whether the stream is present or absent. The detector is preferably of a non-contact type, sensing radiation from the stream, preferably visible light. The rate of flow of additive can be adjustable. There can be a fail-safe optical detector arrangement monitoring the flow of additive and signalling an alarm if the flow fails or if the nozzle is blocked. The timings of the start and end of the flow in relation to the detection of the metal stream are independently adjustable to ensure that the additive and metal coincide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.