PROCEDE DE FIBRAGE DE MATIERES VITRIFIABLES

摘要

A fabrication process of mineral fibers, including: introduction of raw materials into a circular furnace with electrodes; then fusion of the raw materials in the furnace to form a molten vitrifiable material; then outflow of the molten vitrifiable material from the furnace via a lateral outlet to supply a distribution channel; then outflow of the molten vitrifiable material via an orifice in the furnace bottom of the distribution channel to supply a fiber forming device; then transformation into fibers of the molten vitrifiable material by the fiber forming device, flow of molten vitrifiable material between the furnace and the distribution channel passing under a metal dam adjustable in height including an envelope cooled by cooling fluid current. Adjustment of the dam height allows temperature of the glass to be formed into fibers to be varied to bring the glass into a desired viscosity range for the fiber forming process.