Optical Sorting for the Recovery of Glass from WIP Slags – Pilot Plant in Bratislava –

Today, the sensor-based detection and separation of recyclable materials is an important component of waste processing and the recovery of raw materials worldwide.
Cullet especially is an important secondary raw material and indispensable for economic and competitive hollow glass production. The more broken glass material is put into the melt, the less energy is required and fewer additives have to be used. Modern furnace designs and strict exhaust values are based on using up to eighty percent of glass fraction. With such a high proportion of glass content, the cullet quality should be appropriately high so that the melting chemistry is not adversely influenced and so as to avoid malfunctions or even hazards in the production process.

The rapid development of camera technology combined with sophisticated algorithms has revolutionised optical processing and facilitates ever more efficient and precise differentiation and sorting of diverse materials. Close cooperation between machine manufacturers, research establishments and users has paved the way for the adaptation of the sorting machines to the requirements of waste glass processing and new process technologies.

Binder+Co AG with its headquarters in Gleisdorf, Austria, has been focused on driving the development of sensor and camera technology for more than 25 years, particularly in the field of waste glass sorting. One example is the implementation of new, highly efficient UV-based technologies for sorting heat-resistant and lead-containing glasses. Today, there are efficient devices for the separation of contaminants such as ceramics, stone or porcelain (CSP) from the fine glass fraction from a grain size of one millimetre, and colour-sorting from three millimetres.

Depending on the type of source material – i.e. retrieved material from waste-disposal sites or residue from waste incineration plants – different collection systems, transport and storage, the raw glass fraction quality varies during the seasons and depending on the weather. For this reason, individually adjustable special software is used which includes summer and winter process settings and which has settings for the geographically and seasonally very different moisture content and degree of contamination of the waste glass specific to the process technology.

Copyright: © TK Verlag - Fachverlag für Kreislaufwirtschaft
Quelle: Waste Management, Volume 4 (November 2014)
Seiten: 10
Preis inkl. MwSt.: € 0,00
Autor: Dipl.-HTL-Ing. Christian Makari

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