Novel waste printed circuit board recycling process with molten salt
The objective of the method was to prove the concept of a novel waste PCBs recycling process which uses inert, stable molten salts as the direct heat transfer fluid and, simultaneously, uses this molten salt to separate the metal products in either liquid (solder, zinc, tin, lead, etc.) or solid (co...
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doaj-e58ea09082994be3b65fca65a70869042020-11-25T01:29:13ZengElsevierMethodsX2215-01612015-01-012C10010610.1016/j.mex.2015.02.010Novel waste printed circuit board recycling process with molten saltFrank Riedewald0Maria Sousa-Gallagher1Composite Recycling Ltd., The Rubicon Centre, CIT Campus, Bishopstown, Cork, IrelandProcess and Chemical Engineering, School of Engineering, University College Cork, IrelandThe objective of the method was to prove the concept of a novel waste PCBs recycling process which uses inert, stable molten salts as the direct heat transfer fluid and, simultaneously, uses this molten salt to separate the metal products in either liquid (solder, zinc, tin, lead, etc.) or solid (copper, gold, steel, palladium, etc.) form at the operating temperatures of 450–470 °C. The PCB recovery reactor is essentially a U-shaped reactor with the molten salt providing a continuous fluid, allowing molten salt access from different depths for metal recovery. A laboratory scale batch reactor was constructed using 316L as suitable construction material. For safety reasons, the inert, stable LiCl–KCl molten salts were used as direct heat transfer fluid. Recovered materials were washed with hot water to remove residual salt before metal recovery assessment. The impact of this work was to show metal separation using molten salts in one single unit, by using this novel reactor methodology. • The reactor is a U-shaped reactor filled with a continuous liquid with a sloped bottom representing a novel reactor concept. • This method uses large PCB pieces instead of shredded PCBs as the reactor volume is 2.2 L. • The treated PCBs can be removed via leg B while the process is on-going.http://www.sciencedirect.com/science/article/pii/S2215016115000138Printed circuit boards recyclingFloat-sink separationMetal recoveryMolten salt reactor |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Frank Riedewald Maria Sousa-Gallagher |
spellingShingle |
Frank Riedewald Maria Sousa-Gallagher Novel waste printed circuit board recycling process with molten salt MethodsX Printed circuit boards recycling Float-sink separation Metal recovery Molten salt reactor |
author_facet |
Frank Riedewald Maria Sousa-Gallagher |
author_sort |
Frank Riedewald |
title |
Novel waste printed circuit board recycling process with molten salt |
title_short |
Novel waste printed circuit board recycling process with molten salt |
title_full |
Novel waste printed circuit board recycling process with molten salt |
title_fullStr |
Novel waste printed circuit board recycling process with molten salt |
title_full_unstemmed |
Novel waste printed circuit board recycling process with molten salt |
title_sort |
novel waste printed circuit board recycling process with molten salt |
publisher |
Elsevier |
series |
MethodsX |
issn |
2215-0161 |
publishDate |
2015-01-01 |
description |
The objective of the method was to prove the concept of a novel waste PCBs recycling process which uses inert, stable molten salts as the direct heat transfer fluid and, simultaneously, uses this molten salt to separate the metal products in either liquid (solder, zinc, tin, lead, etc.) or solid (copper, gold, steel, palladium, etc.) form at the operating temperatures of 450–470 °C. The PCB recovery reactor is essentially a U-shaped reactor with the molten salt providing a continuous fluid, allowing molten salt access from different depths for metal recovery. A laboratory scale batch reactor was constructed using 316L as suitable construction material. For safety reasons, the inert, stable LiCl–KCl molten salts were used as direct heat transfer fluid. Recovered materials were washed with hot water to remove residual salt before metal recovery assessment. The impact of this work was to show metal separation using molten salts in one single unit, by using this novel reactor methodology.
• The reactor is a U-shaped reactor filled with a continuous liquid with a sloped bottom representing a novel reactor concept.
• This method uses large PCB pieces instead of shredded PCBs as the reactor volume is 2.2 L.
• The treated PCBs can be removed via leg B while the process is on-going. |
topic |
Printed circuit boards recycling Float-sink separation Metal recovery Molten salt reactor |
url |
http://www.sciencedirect.com/science/article/pii/S2215016115000138 |
work_keys_str_mv |
AT frankriedewald novelwasteprintedcircuitboardrecyclingprocesswithmoltensalt AT mariasousagallagher novelwasteprintedcircuitboardrecyclingprocesswithmoltensalt |
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