Basalt Fibre Production from Volcanic Rock
topic
Basalt fibre production melts crushed basalt rock of defined mineral composition in a single-component process without fluxing additives in gas or electric resistance furnaces at 1400 to 1500 degrees Celsius, drawing filaments through multi-hole platinum-rhodium bushings at 20 to 30 metres per second with no fiberising additives required; the complex multi-oxide composition including silica, alumina, iron oxide, and calcium oxide determines fibre properties.
Role
Enables a simpler and more environmentally benign manufacturing process than glass fibre production by eliminating chemical additive preparation and blending steps, using abundant naturally occurring raw material whose mineral variability must be carefully managed through quarry source selection and melt viscosity control to maintain consistent fibre quality and properties.
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