Method and furnace for the preparation of a melt for mineral woo

Details Method and furnace for the preparation of a melt for mineral woo Method and furnace for the preparation of a melt for mineral woo

1988-10-13

1991-09-03

Paschall, M. H.

Electric heating

Metal heating

By arc

21912151, 21912137, 21912138, 21912159, 373 22, 373 24, B23K 900

Patent

active

050461443

ABSTRACT:
In a method for the preparation of a melt for the production of mineral wool a raw material is introduced at the top of a shaft furnace and heated to melting temperature partly with a hot gas formed by plasma heating and partly with a hot gas formed by combustion of one or more gaseous hydrocarbons, the latter gas stream being introduced at a level at which the temperature does not exceed 1250.degree. C., and the melt formed is discharged at the bottom of the shaft furnace.

REFERENCES:
patent: 2958161 (1960-11-01), Palmer
patent: 3917479 (1975-11-01), Sayce et al.
patent: 4361441 (1982-11-01), Tylko
patent: 4396421 (1983-08-01), Stift et al.
patent: 4740989 (1988-04-01), Steipe et al.

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