FIELD: construction material industry. SUBSTANCE: apparatus has forming device comprising basalt charging unit, melting and finishing chambers, heating members and forming bushing feeder. Basalt charging unit has doser shaft provided with slot extending in helical line. Slot is inclined at an angle of 15-30 deg with respect to shaft axis. Depth of slot is 20-25 mm. Ratio of melting chamber area and finishing chamber area is 1:1.5. At least five cylinders are positioned in upper part of finishing chamber, with space between cylinders being 250-300 mm. EFFECT: increased efficiency, simplified construction and improved quality of continuous basalt filament. 1 dwg
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