Process for reusing scrap glass
First Claim
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1. A process for producing glass by charging to a melting furnace and melting therein a mixture of particulate glass batch and scrap glass fiber, including the steps of:
- heating durable particulate heat transfer media which is larger in particle size than the glass bath with exhaust gases from the melting furnace;
milling the scrap glass fibers in the presence of particulate glass batch to reduce the size of the scrap glass fibers to a usable size, the glass batch containing the scrap glass until it is milled;
introducing the mixture into the other end of the container;
rotating the container, during rotation the mixture and media tumbling and moving over each other in heat transfer relationship for a period of time sufficient to remove any organics from the scrap glass fibers; and
moving the mixture in one direction through the rotating container for discharge and moving the media in the opposite direction for discharge at the other end.
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Abstract
A method of removing coatings from scrap glass is disclosed. The scrap glass is milled in the presence of particulate batch, preheated and fed to a glass melting furnace. The particulate batch aids in the milling of the scrap glass. The process removes the coatings from the scrap during preheating and provides clean material for melting.
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Citations
8 Claims
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1. A process for producing glass by charging to a melting furnace and melting therein a mixture of particulate glass batch and scrap glass fiber, including the steps of:
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heating durable particulate heat transfer media which is larger in particle size than the glass bath with exhaust gases from the melting furnace; milling the scrap glass fibers in the presence of particulate glass batch to reduce the size of the scrap glass fibers to a usable size, the glass batch containing the scrap glass until it is milled; introducing the mixture into the other end of the container; rotating the container, during rotation the mixture and media tumbling and moving over each other in heat transfer relationship for a period of time sufficient to remove any organics from the scrap glass fibers; and moving the mixture in one direction through the rotating container for discharge and moving the media in the opposite direction for discharge at the other end. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification
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Current AssigneeOwens- Corning Fiberglas Technology Incorporated (Owens Corning)
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Original AssigneeOwens-Corning Fiberglas Corporation (Owens Corning)
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InventorsSeng, Stephen
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Primary Examiner(s)Yuen, Henry C.
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Application NumberUS06/685,630Time in Patent Office526 DaysField of Search432/13, 432/27, 432/28, 432/210, 432/211, 432/215, 432/105, 432/109, 432/111, 165/111, 65/27US Class Current432/13CPC Class CodesC03B 3/02 combined with preheating, p...C03B 3/023 PreheatingC03C 1/024 Chemical treatment of culle...Y02P 40/50 Glass production, e.g. reus...
