The invention relates to a method and facility for manufacturing a fiberglass material, in which melted glass is produced in a melting furnace heated via combustion of a fuel with an oxygen-rich oxidant. The fumes generated are used to preheat a combustion reagent in two steps: a first step in which air is heated via heat exchange with the fumes, and a second step in which the combustion reagent is preheated via heat exchange with the hot air. The air is then used in the method for converting the melted glass into a fiberglass material.

The invention relates to an apparatus for manufacturing mineral wool. The apparatus includes means (1) for producing molten mineral material, at least one fiberizing device (3) for forming fibres, into which fiberizing device the molten mineral material is fed (2) and by which fibres (12) are formed. The fiberizing device (3) comprises, rotationally arranged around a vertical axis (15), at least one fiberizing plate (13) having a vertical peripheral edge, into which are formed numerous small-sized holes (14), through which the molten material is led by centrifugal force to form fibres (12). Into the fiberizing device (3) are arranged elements to produce a vertical flow of blowing medium (16) to be led around the fiberizing plate (13), the flow causing the fibres (12) to turn downwards and, at the same time, to thin. Downstream the fiberizing device (3) is arranged a collection device (6), into which the formed fibres (12) are led and collected into a mat-like material. In connection with said at least one fiberizing plate (13) is arranged a substantially horizontal, relatively narrow channel (5), through which the fibres (12) are brought into the chamber space (7) of the collection device (6). The invention further relates to a method for manufacturing mineral wool and a mineral wool product manufactured by the method

Methods, systems and apparatus for producing continuous basalt fibers, microfibers, and microspheres from high temperature melts are disclosed. A cold crucible induction furnace is used to super heat crushed basalt rock to form a melt. The melt is cooled prior to forming a fiber. The fiber produced from the superheated melt possesses superior properties not found with conventional basalt fibers produced in gas furnaces. In some implementations, the superheated melt is spun into continuous basalt fibers. In some implementations, the superheated melt is blown into microfibers and microspheres.

Methods, systems and apparatus for producing continuous basalt fibers, microfibers, and microspheres from high temperature melts are disclosed. A cold crucible induction furnace is used to super heat crushed basalt rock to form a melt. The melt is cooled prior to forming a fiber. The fiber produced from the superheated melt possesses superior properties not found with conventional basalt fibers produced in gas furnaces. In some implementations, the superheated melt is spun into continuous basalt fibers. In some implementations, the superheated melt is blown into microfibers and microspheres.

Mineral fibers that exhibit a chemical composition comprising the following constituents, as percentages by weight: TABLE-US-00001 SiO.sub.2 57.0 to 60.0%, CaO 25.0 to 30.0%, MgO >8.0 to 10.0%, B.sub.2O.sub.3 2.5 to 6.0%, R.sub.2O up to 2.5% Al.sub.2O.sub.3 0 to 2.0%, and an R.sub.2O/B.sub.2O.sub.3 molar ratio of 0.20 to 0.60.

Mineral fibers that exhibit a chemical composition comprising the following constituents, as percentages by weight: TABLE-US-00001 SiO.sub.2 57.0 to 60.0%, CaO 25.0 to 30.0%, MgO >8.0 to 10.0%, B.sub.2O.sub.3 2.5 to 6.0%, R.sub.2O up to 2.5% Al.sub.2O.sub.3 0 to 2.0%, and an R.sub.2O/B.sub.2O.sub.3 molar ratio of 0.20 to 0.60.

The invention relates to a fiberglass material manufacture method and facility, were in molten glass is converted into fiberglass material via the steps of spinning, drawing, sizing, and collecting, followed by a step of producing a resulting fiberglass material that is then subjected to thermal desizing. The fumes from the melting furnace are used to preheat a combustion reagent from the melting furnace in two steps: a first step in which air is heated via heat exchange with the fumes, and a second step in which the combustion reagent is preheated via heat exchange with the hot air, the air then being used in the step of desizing the fiberglass material.

The invention relates to a fiberglass material manufacture method and facility, were in molten glass is converted into fiberglass material via the steps of spinning, drawing, sizing, and collecting, followed by a step of producing a resulting fiberglass material that is then subjected to thermal desizing. The fumes from the melting furnace are used to preheat a combustion reagent from the melting furnace in two steps: a first step in which air is heated via heat exchange with the fumes, and a second step in which the combustion reagent is preheated via heat exchange with the hot air, the air then being used in the step of desizing the fiberglass material.

Mineral fibers that exhibit a chemical composition comprising the following constituents, as percentages by weight:

TABLE-US-00001 SiO.sub.2 57.0 to 60.0%, CaO 25.0 to 30.0%, MgO >8.0 to 10.0%, B.sub.2O.sub.3 2.5 to 6.0%, R.sub.2O up to 2.5% Al.sub.2O.sub.3 0 to 2.0%,

and an R.sub.2O/B.sub.2O.sub.3 molar ratio of 0.20 to 0.60.

Mineral fibers that exhibit a chemical composition comprising the following constituents, as percentages by weight:

TABLE-US-00001 SiO.sub.2 57.0 to 60.0%, CaO 25.0 to 30.0%, MgO >8.0 to 10.0%, B.sub.2O.sub.3 2.5 to 6.0%, R.sub.2O up to 2.5% Al.sub.2O.sub.3 0 to 2.0%,

and an R.sub.2O/B.sub.2O.sub.3 molar ratio of 0.20 to 0.60.