Silicate glass from blast furnace slag |
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| 申请号 | US33225473 | 申请日 | 1973-02-14 | 公开(公告)号 | US3867158A | 公开(公告)日 | 1975-02-18 |
| 申请人 | CALUMITE CO; | 发明人 | HOPKINS JOHN O; | ||||
| 摘要 | Glass and new glass-like products are provided which may have unique compositions and properties and are adapted for use in producing a wide variety of products which may be clear or transparent in color and capable of use in the manufacture of sheet materials, containers, fibers, glazes, and other ceramic articles. The compositions may be manufactured in a conventional glass furnace from a mixture of ingredients, the major portion of which may be a slag from which at least a portion of the sulfur and/or iron or both have been removed. The resulting products are glasses which may be composed primarily of the silicates of calcium, magnesium and aluminum or combinations thereof. | ||||||
| 权利要求 | 1. THE METHOD OF PRODUCING A TRANSPARENT GLASS WHICH CONSISTS MELTING A MIXTURE OF GLASS FORMING MATERIALS CONSISTING ESSENTIALLY OF SAND, FROM ABOUT 20% TO 500% OF REFINED SLAG BASED UPON THE WEIGHT OF THE SAND IN THE MIXTURE, AND FROM ABOUT 16 TO 100% BASED ON THE WEIGHT OF THE SAND IN THE MIXTURE OF AN AGENT SELECTED FROM THE GROUP CONSISTING OF THE SULFATES AND CARBONATES OF SODIUM AND CALCIUM AND MIXTURES THEREOF, SAID REFINED SLAG BEING A BLAST FURNACE SLAG CONTAINING LESS THAN 0.3% BY WEIGHT OF SULFUR. 2. The method as defined in claim 1 wherein said mixture of a glass forming materials also includes slag compositions other than said refined slag. 3. The method as defined in claim 1 wherein said mixture contains a sulfate selected from the group consisting of gypsum, barytes and salt cake. 4. The method as defined in claim 1 wherein said mixture contains an amount of a sulfate compound substantially equal to the weight of the sand in the mixture. 5. The method as defined in claim 1 wherein said mixture consists essentially of about 2000 parts by weight of refined slag, about 326 parts by weight of sand and about 326 parts by weight of gypsum. 6. The method as defined in claim 1 wherein said refined slag contains about 0.03% or less of sulfur and about 0.3% or less of iron. 7. A transparent glass product resulting from the fusion in a glass furnace of a mixture of glass forming materials consisting essentially of sand, from about 20% to 500% based on the weight of the sand of blast furnace slag containing less than 0.3% sulfur, and from about 16% to 100% based on the weight of the sand of an agent selected from the group consisting of the sulfates and carbonates of sodium and calcium and mixtures thereof, said glass product having a SiO2 content not exceeding about 50% and an alkali content not exceeding about 5%, and having a coefficient of expansion less than 80 X 10 7 8. A glass product as defined in claim 7 having an SiO2 content of less than 50%. 9. A glass product as defined in claim 7 which contains substantially no lead or boron. |
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