초록 ▼

A method of forming high strength glass fibers in a refractory lined glass melter is disclosed. The refractory lined melter is suited to the batch compositions disclosed for the formation high modulus, and high-strength glass fibers. The glass composition for use in the method of the present inventi

A method of forming high strength glass fibers in a refractory lined glass melter is disclosed. The refractory lined melter is suited to the batch compositions disclosed for the formation high modulus, and high-strength glass fibers. The glass composition for use in the method of the present invention is up to about 70.5 Weight % SiO2, 24.5 weight % Al2O3, 22 weight % alkaline earth oxides and may include small amounts of alkali metal oxides and ZrO2. Oxide based refractories included alumina, chromic oxide, silica, alumina-silica, zircon, zirconia-alumina-silica and combinations thereof. By using oxide based refractory lined furnaces the cost of production of glass fibers is substantially reduced in comparison with the cost of fibers using a platinum lined melting furnace. Fibers formed by the present invention are also disclosed.

대표청구항 ▼

We claim: 1. A process for producing glass fibers from raw glass batch in a refractory lined glass melter, the process comprising the steps of: charging raw glass batch to the melting zone of the glass melter, the glass batch comprising: about 60.5 to about 70.5 weight percent SiO2; about 10 to abo

We claim: 1. A process for producing glass fibers from raw glass batch in a refractory lined glass melter, the process comprising the steps of: charging raw glass batch to the melting zone of the glass melter, the glass batch comprising: about 60.5 to about 70.5 weight percent SiO2; about 10 to about 24.5 weight percent Al2O3; about 15.0 to about 20.0 weight percent RO, where RO equals the sum of MgO, CaO, SrO and BaO in the batch composition, 5 to 11.33 weight percent of the RO being MgO; and about 0 to about 3 weight percent alkali metal oxides; heating the glass batch to a forming temperature in excess of the liquidus temperature of a resulting glass to form a fiberizable molten glass; and fiberizing said molten glass. 2. The process of claim 1, wherein the glass batch comprises: less than 4 weight percent of compounds selected from the group consisting of ZnO, SO3, Fluorine, B2O3, TiO2 and Fe2O3. 3. The process of claim 1, wherein glass produced from said batch has a fiberizing temperature of less than about 2650° F., and a ΔT of at least about 80° F. 4. The process of claim 3 wherein glass produced from said batch has a ΔT of at least 120° F. 5. The process of claim 1, wherein the glass melter is lined with a refractory material selected from the group consisting essentially of alumina, silica, chromic oxide, alumina-silica, zircon, zirconia-alumina-silica and combinations thereof. 6. The process of claim 1, wherein glass produced from the batch is fiberized at a forming temperature of less than about 2650° F. 7. 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 glass melter, the glass batch comprising: 60.5-70.5 weight percent SiO2; 10-24.5 weight percent Al2O3; 15.0 to 20.0 weight percent RO, where RO equals the sum of MgO, CaO, SrO and BaO in the batch composition, 5 to 11.33 weight percent of the RO being MgO; and 0 to 3 weight percent alkali metal oxides; and 0 to 3 weight percent ZrO2 providing at least one burner within the roof of the glass melter; and melting the glass batch to form a fiberizable molten glass. 8. The process of claim 7, wherein the glass melter is lined with a refractory material selected from the group consisting essentially of alumina, chromic oxide, silica, alumina-silica, zircon, zirconia-alumina-silica and combinations thereof. 9. The process of claim 7, wherein the glass produced from the batch is fiberized at a forming temperature of less than 2650° F. 10. A process for producing glass from a raw glass-forming material in a refractory lined glass melter; the glass melter having a root 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 glass melter; the glass batch comprising: 60.5-70.5 weight percent SiO2; 10-24.5 weight percent Al2O3; 15.0 to 20.0 weight percent RO, where RO equals the sum of MgO, CaO, SrO and BaO in the batch composition, 5 to 11.33 weight percent of the RO being MgO; and 0 to 3 weight percent alkali metal oxides providing at least one burner within the roof of the glass melter; and melting the glass batch to form a fiberizable molten glass. 11. The process of claim 10, wherein the glass melter is lined with a refractory material selected from the group consisting essentially of alumina, chromie oxide, silica, alumina-silica, zircon, zirconia-alumina-silica and combinations thereof 12. The process of claim 10, wherein the glass produced from the batch is fiberized at a foiming temperature of less than 2650° F. 13. The process of claim 10, wherein the glass batch comprises: less than 4 weight percent of compounds selected from the group consisting of ZnO, ZrO2, SO3, Fluorine, B2O3, TiO2 and Fe2O3. 14. The process of claim 13, wherein the glass melter is lined with a refractory material selected from the group consisting essentially of alumina, chromic oxide, silica, alumina-silica, zircon, zirconia-alumina-silica and combinations thereof. 15. The process of claim 13, wherein the glass produced from the batch is fiberized at a forming temperature of less than 2650° F.