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Melting temperature dependent separations of metallic electronic wastes and wires using induction heat and centrifugal forces
Mandadi, Gopi Krishna
Mandadi, Gopi Krishna
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2016-05
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Electronic dissertations
Electronic dissertations
Electronic dissertations
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Abstract
E-waste from around the world is being dumped in landfills and open areas, causing a serious
environmental issue by releasing toxic gases or leached hazardous components. Over 300 tons of
gold are used in electronic components each year, and this number is high in the electronic gadgets
manufactured in the 20th century. In the last decade, usage of electronic gadgets has phenomenally
increased, and this E-Waste consists of heavy metals, hazardous metals, flame retardants, and other
plastic additives. The dumping list of E- Waste includes computers, laptops, Printed Circuit
Boards, Peripheral Component Interface, mobile phones, DVD’s and electrical wires. Precious
metals like gold, platinum, and lead are being dumped along with this E–Waste. The proper
disposal of electronic waste and electrical components is currently a concern of researchers as
these electronics not only generate the waste, but also release heavy and toxic metals to the
environment. This study analyses the possible eliminations of waste by recovering the metals and
thus reducing the effects on the environment and reserving the metals for future generations.
Analysis is performed on PCB’s, Motherboards, PCI’s, Random Access Memory, and Processors
for the recovery of precious metals like copper, gold, and lead. Experiments for metal recovery
through induction heating are performed. An electrical induction furnace is used for the burning
of waste and to recover the metals such as copper, aluminum, and solder from the electrical cable
waste. A perforated basket is designed and manufactured for feeding the e-waste and for heat
treatment, thus, recovering the precious metals from the waste. All the metals were heated to their
respective melting points and melted and recovered. Experiments are carried out with and without
insulation material on the electrical wires and 90% recovery rates were reported for the high speed
samples. This study may open up new possibilities of extracting the precious metals by heating
them to their melting points.
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Thesis (M.S.)--Wichita State University, College of Engineering, Dept. of Mechanical Engineering
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Wichita State University
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Copyright 2016 Gopi Krishna Mandadi