US 12,290,843 B2
Sorting out waste glass cullet with a higher iron oxide content
Karl Leitner, Anger (AT)
Assigned to BINDER + CO AG, Gleisdorf (AT)
Filed by BINDER + CO AG, Gleisdorf (AT)
Filed on Aug. 13, 2024, as Appl. No. 18/801,903.
Claims priority of application No. 23195961 (EP), filed on Sep. 7, 2023.
Prior Publication US 2025/0083192 A1, Mar. 13, 2025
Int. Cl. B07C 5/34 (2006.01); B07C 5/342 (2006.01)
CPC B07C 5/3425 (2013.01) [B07C 5/3422 (2013.01); B07C 2501/0054 (2013.01); B07C 2501/0072 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for sorting out waste glass cullet with a higher content of iron oxide from a single-layer material stream of waste glass cullet, wherein the material stream contains waste glass cullet with a higher and with a lower content of iron oxide, comprising:
irradiating the material stream with visible light and detecting the visible transmission light passing through the waste glass cullet,
irradiating the material stream with infrared light in a frequency range of at least 1100-1200 nm and detecting the infrared transmission light passing through the waste glass cullet,
wherein a piece of waste glass cullet is classified as having a higher iron oxide content when the ratio of an intensity of the infrared transmission light to an intensity of the visible transmission light exceeds or falls below a predetermined threshold value, and
wherein the piece of waste glass cullet classified in this way is separated from other waste glass cullet.