Urban mining of precious metals and copper from mobile motherboards: Recovery studies
6th International Conference on Recycling and Waste Management
December 03-04, 2018 | Dubai, UAE
K Pavan Kumar Reddy, Kushal Gaddam, Vamshi Chirtha, Akhil V, MRP Reddy, Rajesh Kumar and K Srinivasa Vadayar
Centre for Materials for Electronics Technology, India JNTUH College of Engineering, India
Scientific Tracks Abstracts : J Biotech and Phyto
Globalization of information and communication has not
only revolutionized our lives, economies and industries
but also led to hazardous wastes generated from electronics.
E waste or Electronic waste is a term for electrical and
electronic equipment’s that have become discarded or
obsolete. Almost all E waste contains some or other form
of recyclable material including plastic, glass and metal. The
need of recycling the e waste is increasing day by day with the
increase in production of electronic devices and discarding
them after usage. The economics of E-waste recycling lies
with the recovery of precious metals. A mobile mother board
contains many valuable metals like gold, silver, palladium
and copper. Recovery of precious metals and valuable metals
is a big challenge as it also contains hazardous substances
such as cadmium, bromine, mercury, dioxins, furans etc.
Thermo Gravimetric Analysis (TGA) has performed to study the thermal degradation characteristics of Mobile Mother Board (MMB). MMBs were calcined at 8000C about two hours in a gas fired furnace for complete combustion of MMB. The flue gases were treated at 1200°C for removing the organic toxins using a gas cleaning system.
Calcined MMBs are made into fine powder and elemental analysis made for the MMBs. Based on the composition of the elements present in MMBs different types of fluxes were added with different composition to concentrate the precious elements in Black copper during smelting process at temperature of 13000C where the gangue can be separated as slag. The chemical composition of the smelted copper is presented and discussed. This study reveals that mobile mother boards are rich source of copper and precious metals.
K PAVAN KUMAR REDDY has completed his bachelor degree in Mechanical Engineering at
the age of 21 years from JNTU Hyderabad University, INDIA. He is pursuing his masters in
Metallurgical Engineering in JNTU Hyderabad University. He has participated in International
conference on Semiconductors and workshop on E waste Management organized by
C-MET Hyderabad. He has given oral presentation in All INDIA seminar on “Advances in
Metallurgy and Manufacturing Process” organized by The Institute of Engineers – INDIA.
E-mail: [email protected]