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A method of preparing a melt for mineral fibre production wherein a mixture of mineral fibre-forming raw materials is introduced into a shaft furnace and is heated to melting temperature by a plasma gas stream formed in a plasma torch and wherein waste material from mineral fibre production is intro

A method of preparing a melt for mineral fibre production wherein a mixture of mineral fibre-forming raw materials is introduced into a shaft furnace and is heated to melting temperature by a plasma gas stream formed in a plasma torch and wherein waste material from mineral fibre production is introduced into the plasma gas stream by a rotatable screw conveyor mounted in a feed pipe, the melt formed in the shaft furnace is being discharged from the bottom of the furnace and passed to a fiberizing apparatus in which it is converted into mineral fibres.

대표청구항 ▼

An apparatus for preparing a melt for mineral fibre production comprising a shaft furnace, first supply means for introducing mineral fibre-forming raw materials therein, means for discharging melt from the bottom of the furnace, at least one plasma torch for producing a plasma gas stream which is c

An apparatus for preparing a melt for mineral fibre production comprising a shaft furnace, first supply means for introducing mineral fibre-forming raw materials therein, means for discharging melt from the bottom of the furnace, at least one plasma torch for producing a plasma gas stream which is connected with an interior of the shaft furnace through a connecting pipe, and second supply means for introducing waste material into said plasma gas stream prior to entering said shaft furnace, said second supply means including a feed pipe for waste material connected with the connecting pipe and including a rotatable screw conveyor mounted therein.