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Materials-Metals 2017
Notes:
Page 35
November 16-17, 2017 Paris, France
13th Annual Conference on
Materials Science, Metal and Manufacturing
Journal of Materials Science and Nanotechnology
Volume 1 Issue 2
Jonathan Cramer, Mater Sci Nanotechnol 2017, 1:2
Thermal plasma extractive metallurgy for e-waste
recycling
Jonathan Cramer
Fondation ParisTech, France
Recycling processes are now widely recognized as one of the
solutions against the primary mineral resources supply risk.
The most developed countries are aware of this issue and aim to
find innovative processes to recycle strategical metallic elements.
The existing processes are pyro and/or hydrometallurgical
processes, however they may face significant drawbacks. Within
the framework of alternative new recycling processes, we use the
thermal plasma media to perform extractive metallurgy. Indeed,
the so-called 4th state of matter combines the properties of hydro
and pyro-metallurgical processes in addition to its particular
properties. The selective extraction and recovery of desired
metal in binary/ternary samples alloys (FeCu, CuSn, CuSnIn)
has been carried out by a 15kW enhanced plasma process. The
enhancement lies in the modification (additives) and the control
of the hot plasma chemical reactivity and temperature. The liquid
alloy mass transport is also studied and controlled (by a DC bias)
in order to understand the plasma-alloy interface and optimize
the extraction. The extracted elements are transported by the
plasma flow and recovered by condensation on a capture plate.
The understanding and the control of the plasma-alloy interface
led to the selective extraction of the desired elements with a high
purity. Some plasma thermodynamic tools have been conceived
to improve the selectivity and extraction rate. Multiple diagnosis
tools (OES, LIBS, DRX, ICP…) are employed in-situ and ex-situ
so that an extraction mechanism can be proposed. The thermal
plasma is a suitable media for metallurgical processes. In this
project we used a customizable and controllable thermal plasma
process to selectively extract and recover metal from binary/
ternary alloys (Cu,Sn,In…), with the further objective to recycle
strategic metals from more diverse and complex matrices.
Biography
Jonathan S. Cramer is a second year PhD student specialized in
electrochemistry chemical engineering and material chemistry for applications
in sustainable industries. During his Master studies he had the opportunity to
work on topics such as: the durability of reinforced concrete building in the
marine environment and the corrosion behaviour of hybrid aeronautic materials.
Later on he focused on new alternative recycling processes destined to high
value metallic wastes. Moreover, he worked as a research engineer on the set
up of a molten salt electrochemical process for the recycling of super-alloys on
end of life aircrafts. Now, as a PhD student, he investigates the implementation
of a new thermal plasma process destined to the recycling of Waste Electrical &
Electronic Equipment (WEEE).