Apparatus for producing mineral wool
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United States of America Patent
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Jun 23, 1992
Grant Date -
N/A
app pub date -
Apr 29, 1991
filing date -
Sep 2, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to a method of producing mineral wool, mineral raw material (2) is introduced into a melting unit (3), preferably a cupola furnace, for heating the mineral raw material in such a manner that molten mineral material (4) is formed on the bottom of the melting unit, whereafter the molten mineral material is discharged from the melting unit, heated further, and introduced along at least one tapping chute (8, 9) into a spinning machine (10) in which the mineral material is converted into fibre form. In order to make the mineral melt homogeneous and to ensure that the high quality of the obtained mineral wool, the method according to the invention is characterized in that said further heating is carried out by heating the molten mineral material (4') by means of electric plasma, the plasma heating being carried out in the tapping chute (9) while the molten mineral material (4') flows in the tapping chute so as to obtain a rapid adjustment of the temperature of the molten mineral material and to introduce the molten mineral material into the spinning machine (10) at an even temperature.
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