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“The information age’s toxic garbage” A review of electronic waste (e-waste) ... - page 12 / 24

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CATHODE RAY TUBES (CRT) RECYCLING SOLUTIONS-2 (CRTs contain 0.5-5 kg Pb in the glass  for X-ray protection and 1- 2.3 kg Cu in the yoke)

1. GTG Recycling: Closed loop recycling (from used CRT to new CRT(up to 40%)). Labor intensive and expensive method.

a. Shredding: CRT is ground as a whole into cullets, which are used to make new cullets to replace the virgin material (mixed cullets sold to smelters)

b. Sawing: Panel and funnel glasses can be separeted  to avoid contamination (sorted cullets sold to smelters)

(Leaders: Eco-International (2007) (NxTCycle-AZ, Envirocycle-PA (1991), Amandi), Dlubak Glass-Oh/AZ (Largest recycler-10% of US CRTs).

2. GTL Recycling: Automated, cheap, safe,  efficient; but, reduces the high-quality of glass

Before smelting, the CRT is shredded, Pb and Cu metals and plastics are separated. Recovered CRT glass goes to the Pb smelter and it behaves as a fluxing agent in the smelting process.

(Ex: Doe Run (World’s largest secondary Pb smelter), Noranda (Xstrata)

Rival to CRT Recycling: 10 times cheaper overseas recycling. Shipping cost is cheap with empty containers to China

CRT        Liquid-Crystal Dispays (LCD) and Plasma Screen (Flat Sceen-HDTV)

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