Introduction – CRT Glass Recycling
End of life TV sets and computer monitors require to be recycled to maximise the level of material recovery
CRT glass is the largest item by weight. However, because of the 2 different types of glass used in CRT manufacture, the glass fractions have to be processed to achieve a separation of the 2 type of glass, i.e. panel glass separated from funnel glass.
Panel glass has virtually no lead content, whilst funnel glass normally has a lead content in the 20-25% range. The lead, in the form of lead oxide, is included as shielding against the X-Rays inherent in TV’s and monitors It is essential to separate the 2 qualities of glass to maximise the recycling revenues.
Over the years, the amount of lead content used in the manufacture of both panel and funnel glass has varied. CRT glass manufactured in earlier days had panel glass with a lead content of up to 3.25% whilst funnel glass had a lead content in the 14-15% range.
The particle size range for the CRT glass separation is 8 mm to 100 mm, and best separation results are achieved with intermediate size splits.
What do we do?
Benchmark Vista specialises in recycling the cathode ray tube (CRT) glass found within televisions and computer monitors. We do not recycle televisions or computer monitors; our focus is solely on the processing of the CRT glass. We clean, separate and remove contamination from the CRT glass to prepare it for glass-to-glass recycling.
Glass-to-glass recycling, refers to the closed loop recycling process of reclaiming leaded CRT glass from end-of-life CRTs and using the glass as an ingredient to manufacture new CRT’s. There are a number of quality controls used in the processing and cleaning of the CRT glass in order to meet the strict product specifications required for glass-to-glass recycling.
We recycle CRT glass safely and responsibly. Our demanufacturing and recycling processes allows for glass cullet to be reused in other manufacturing processes. Our treatment process for this material has been reviewed and authorised by the receiving CRT manufacturer and the Department of the Environment.
Benchmark Vista has developed a unique solution to separate the lead (Pb) from the leaded glass structure in cathode ray tubes (CRTs), which are found in televisions and computer monitors. Our Glass’ recycling plant is available to buy and within Malaysia nationwide.
The Importance of the Recycling Business
Why is this important?
There are three main aspects to consider: the effects of lead, new legislation and increasing volume of waste. The dangerous impact of lead poisoning on the human body, especially on the nervous system, and on our environment is well documented. It is presently banned in fuel, paint and pipes and more recently on all new electronics under the new DOE Directive.
Why can’t I use ordinary landfill?
CRTs contain leaded glass and in landfill the acidic nature of ground water accelerates lead to leach into watercourses. The lead content in the glass of a CRT can be as high as 20%, which means a single 34″ television could contain more than 1kg of lead.
Benchmark Vista endeavours to reuse, recycle or reprocess every part of your screen.
After careful dismantling, the plastic carcass surrounding your screen is recycled using established routes. The metallic components, e.g. copper yoke, shadow mask and circuit boards are stripped away and sent for precious, ferrous and non-ferrous metal recovery.
The rear of the tube containing the leaded funnel and neck glass is separated from the lead free panel glass , ensuring no cross contamination of the two different glass types.
The Panel has the phosphor coating removed and is separately treated leaving a clean glass ready for reuse.
The leaded glass is crushed and processed in our recycling plant. The process results in two distinct re-usable streams of clean, molten glass and lead. Both can be immediately re-used as valuable raw materials with no further processing