Method for determining the purity of processed waste glass

Classifying – separating – and assorting solids – Treatment subsequent

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209577, 209639, 209930, B07C 500

Patent

active

059134275

ABSTRACT:
A method for determining the purity of processed waste glass, in which the sample quantity is taken from the processed waste glass stream and is deposited preferably in one layer and is allowed to flow over a free-falling track and the foreign matter according to non-ferrous metals and opaque foreign particles are blown out and weighed according to a separate detection of said groups of foreign matter and for the determination of the quality of the sample the ratios of non-ferrous metal additions to the entire sample quantity and the opaque foreign particles to the entire sample quantity are determined, with said groups of foreign matter being jointly weighed continuously and the weight increases, depending on the group of foreign matter--non-ferrous metals or opaque foreign particles--which was detected immediately prior to the weight increase, being added to this group of foreign matter. In order to allow the determination of the share of foreign matter in the sample precisely it is provided that prior to the detection of the aforementioned groups of foreign matter glass particles are sorted out in a first step from the material stream flowing over the free-falling track and the pieces which are evaluted at first as foreign matter, optionally with an intermediate storage, are freed from any adhering residues of labels and the like and are thereafter allowed to flow over a free-falling track again, with glass pieces and the foreign matter being mutually separated and are allocated depending on the detection to the opaque foreign matter or the non-ferrous metals.

REFERENCES:
patent: 4765484 (1988-08-01), Klumparendt
patent: 5314071 (1994-05-01), Christian et al.

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