Method of recycling batches of mixed color cullet into amber, green, or flint glass with selected properties

CAFC
  • US 6,230,521 B1
  • Filed: 04/09/1998
  • Issued: 05/15/2001
  • Est. Priority Date: 04/09/1998
  • Status: Expired due to Term
First Claim
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1. A method of creating recycled glass products of a particular color from raw materials including mixed color glass cullet, said mixed color glass cullet including at least two of green glass, amber glass, and flint glass, comprising the steps of:

  • selecting virgin glass raw materials and determining percentages of selected components of said virgin glass raw materials;

    determining percentages of at least said selected components of said mixed color glass cullet;

    determining how much of said mixed color glass cullet is to be melted as a fraction of a recycled finished glass from which said recycled glass products are to be created;

    specifying the percentage composition of said at least two of said amber, green, and flint glass in said mixed color glass cullet;

    specifying, prior to melting of said mixed color glass cullet, transmission properties of said recycled glass products of said particular color;

    calculating using said percentages and said percentage composition the desired glass coloring oxide agent levels and key glass color indicator parameters of glass of said particular color with said specified transmission properties;

    calculating a composition of said recycled finished glass, said composition including said percentages of said raw materials, said mixed color glass cullet, and amounts of said glass coloring oxide agents suitable to adjust final glass coloring oxide agent levels to said desired glass coloring oxide agent levels for glass of said particular color with said specified transmission properties, whereby when said particular color is green, color contribution of said amber glass is adjusted, when said particular color is amber, color contribution of said green glass is adjusted, and when said particular color is flint, color contribution of said green and amber glass is adjusted; and

    creating recycled glass products from said calculated composition.

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