| 摘要 |
Furnace for the production of a melt for the manufacture of mineral fibres comprising an opening for the introduction of starting material, a furnace chamber having such a shape that the introduction of starting material through the inlet opening results in the formation of a material column with an inclined surface, at least one burner serving to produce a flow of hot gases directed towards the inclined surface of the material column to melt the starting material, means for collecting and discharging melt from the furnace bottom, and means for promoting the movement of starting material downwardly over the inclined surface of the material column in the form of a row of parallel tubes surrounding individually controllable pistons each of said pistons being capable of performing forward and backward movements relative to the surrounding tube.
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