Method of manufacturing S-glass fibers in a direct melt operation and products formed there from

摘要

A method of forming high strength glass fibers in a refractory-lined glass meter, products made there from and batch compositions suited for use in the method are disclosed. The glass composition for use in the method of the present invention is up to about 64-75 weight percent SiO2, 16-24 weight percent Al2O3, 8-12 weight percent MgO and 0.25-3 weight percent R2O, where R2O equals the sum of Li2O and Na2O, has a fiberizing temperature less than about 2650° F., and a ΔT of at least 80° F. By using oxide-based refractory-lined furnaces the cost of production of glass fibers is substantially reduced in comparison with the cost of fibers produced using a platinum-lined melting furnace. High strength composite articles including the high strength glass fibers are also disclosed.

主权项

1. A process for producing glass from raw glass-forming material in a refractory-lined glass melter, the glass melter having a roof, a bottom and side walls, defining an elongated channel having a melting zone and a downstream refining zone, the process comprising the steps of:
charging raw glass batch to the melting zone of the refractory-lined glass melter, the glass batch comprising:
68-69 weight percent SiO2;20-22 weight percent Al2O3;9-10 weight percent MgO;no more than 2.0 weight percent CaO; and1-3 weight percent Li2O; providing at least one burner within the roof of the glass melter; and melting the glass batch to form a fiberizable molten glass, wherein said molten glass produced has a fiberizing temperature of less than about 2650° F.