Method for the production of mineral wool
US5601628A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 2, 1994 |
| Grant date | Feb 11, 1997 |
| Priority date | — |
| Expiry date | Aug 2, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B37/048
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Mineral material, particularly of the basalt type, is fiberized by internal centrifuging in a spinner having a peripheral wall with a plurality of orifices. A heated gas flow attenuates into fibers the filament cones emanating from the orifices. To produce mineral wool with good fiber fineness and largely free of unfiberized particles, the length of the filament cones and the configuration of the heated gas flows generated around the spinner are adjusted so that the majority of the filament cones emanating from the spinner orifices intersects the isotherm corresponding to a viscosity of 100 poises to enter into a zone cooled down to a temperature corresponding to a viscosity of more than 100 poises. The configuration of the heated gas flow is produced by an annular external burner in conjunction with an annular external blower that produces jets of cool air. The cool air brings low-temperature isotherms in close vicinity to the peripheral wall of the spinner. This enables the tips of the filament cones to reach into a cool zone, thereby increasing the viscosity at the tip of the filament cones to avoid breakage of the filament cones to be attenuated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.