Method for processing optical fiber wastes
AssigneeQuarzwerke GmbH
InventorsMichael Riess, Jörg Ulrich Zilles, Nicola Panic
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Abstract
The present invention relates to a process for comminuting glass fibers from waste glass-based fibrous materials, comprising the process steps of a) coarsely comminuting the glass fibers to obtain coarsely comminuted glass fibers; and b) finely comminuting said coarsely comminuted glass fibers with a granular additive having a d50 value within a range of from 0.1 to 5.0 mm as an aggregate to obtain finely comminuted glass fibers, the mixing ratio of glass fibers to additive being from 25/75 to 95/05 by weight.
Claims15
A process for comminuting glass fibers from waste glass-based fibrous materials, comprising the process steps of
- a) coarsely comminuting the glass fibers to obtain coarsely comminuted glass fibers;
- and
- b) finely comminuting said coarsely comminuted glass fibers with a granular additive having a d50 value within a range of from 0.1 to 5.0 mm as an aggregate to obtain finely comminuted glass fibers, the mixing ratio of glass fibers to additive being from 25/75 to 95/05 by weight.
Use of an additive selected from the group of quartz sand, lime, burnt lime, dolomite, burnt dolomite, blast furnace slag, Al2O3, aluminum hydroxide, albite, orthoclase, anorthite, boric acid, boron oxide, alkali and alkaline earth borates, and mixtures thereof as an aggregate at a ratio of 25/75 to 95/05 by weight, preferably 30/70 to 80/20 by weight mass fibers to additive), for comminuting glass fibers.
A mixture containing glass fibers, containing:
- finely comminuted glass fibers having a length of <2 mm;
- an additive having a d50 value within a range of from 5.0 μm to 5.0 mm, the mixing ratio of glass fibers to additive being from 25/75 to 95/05 by weight, or from 30/70 to 80/20 by weight.
Dependencies are inferred from the claim text.