Learning the science
After running the new plant for about a year, Daoud mentions the WENDT-TOMRA sorting circuit offers the flexibility to quickly adapt to the ebbs and flows of the market and meet the quality demands of its customers. “As China rolls out its regulations, other markets like Malaysia, Indonesia and India follow suit, and Europe also has similar standards,” he says. “The new circuit allows us to stay relevant and capitalize on these markets.”
The company has also fine-tuned both upstream and downstream ASR processing to maximize metal recovery and quality. At the shredder, the company has adjusted the hammers and grates to reduce the amount of oversize material returned to the plant. Z-Box and wind sifter adjustments, along with fine-tuning eddy current splitters help to send a cleaner product to the FINDER units.
“There is definitely a science behind the circuit. TOMRA makes a great piece of equipment, and we are very happy with the quality of the sorted material,” says Daoud. “We are excited for ‘what’s next’ and working with WENDT, TOMRA and our other partners to adapt to future changes.”
Sidebar: What’s in the metals mix?
ASR is sorted into several different products and sizes, primarily determined by the recycling operation and what its customers are demanding. Among the most popular mixed metals packages are Zurik, Zebra and Zorba, which are sold to other recycling facilities for further processing. The make-up of these mixed metals include:
- Zurik (predominantly stainless steel) – a combination of nonferrous metals: stainless steel, insulated copper wire, aluminum, copper, lead, magnesium, nickel, tin, and zinc, in elemental or alloyed (solid) form.
- Zebra (high density) – high-density nonferrous metal produced by media separation technology containing brass, copper, zinc, nonmagnetic stainless steel, and copper wire.
- Zorba (predominantly aluminum) – a combination of nonferrous metals: aluminum, copper, lead, magnesium, stainless steel, nickel, tin, and zinc, in elemental or alloyed (solid) form.
Click on the link to see PNW Metal’s new ASR processing plant: https://video.tomra.com/tomra-metal-segment-pnw-metal.