METHOD FOR PRODUCING BASALTIC FIBRES AND DEVICE FOR REALISING THE SAME

摘要

The present invention relates to the production of mineral fibres made of natural materials from the group of basalt. The method of the present invention comprises loading the basalt into a melting furnace, melting down said basalt, stabilising the glass mass in a feeder at a temperature of between 1250 and 1450 DEG C, producing the fibres through a feeding unit, drawing the fibres through dies, greasing said fibres and finally winding them onto reels. Before loading into the furnace, the basalt is pre-heated at a temperature of between 150 and 900 DEG C, while the melted glass mass is maintained in the stabilisation zone of the melting furnace until a fibre production temperature of tfusion + (50 - 250 DEG C) is reached. The device for realising this method comprises the following elements: a basalt dosing unit; a melting furnace; a feeder; a plurality of dies; and mechanisms for lubricating and for winding the fibres onto reels. The dosing unit comprises a heat exchanger which is connected to the firebox of the furnace, while the furnace comprises a stabilisation zone for the melted glass mass which is connected to the feeder. This method may be used to shorten the industrial cycle and to increase the fibre resistance and thermal endurance.