Can Eddy Current Separators Revolutionize Recycling and Waste Management?

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Discussion Overview

The discussion revolves around the potential of eddy current separators in recycling and waste management systems. Participants explore the effectiveness of current technologies, the feasibility of improvements, and the behavior of different materials during the separation process.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant seeks information on eddy current separation technology and its effectiveness, questioning the potential for improvements.
  • Another participant suggests looking for information online and through trade-specific equipment suppliers, indicating that some systems are effective while others may require enhancements.
  • It is proposed that the characteristics of the shredder must be matched to the separator for optimal performance, emphasizing the need for a cost-effective solution.
  • Some participants note that certain non-ferrous metals may have better separation capabilities due to factors like electrical conductivity, magnetic properties, and density.
  • There is a discussion about the impact of size on separation, with a claim that larger bits of waste may be thrown further than smaller bits due to differences in mass and surface area affecting eddy current induction.

Areas of Agreement / Disagreement

Participants express varying opinions on the effectiveness of current systems and the potential for improvements, indicating that multiple competing views remain. The discussion on the influence of material size on separation outcomes also reflects differing perspectives.

Contextual Notes

Participants mention the importance of matching system characteristics and the complexities involved in optimizing eddy current separators, but do not resolve the specifics of these interactions or the overall effectiveness of existing systems.

owen2612
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Hello
I am a graduate Mechanical Design Engineer who was recently offered a job (through a graduate scheme) at a company that develops Recycling and waste management systems. As part of this I have to design and develop an new eddy current separation system so that the company can build the product in-house.

I wanted to ask the following questions :

where would the best place to look for information on Eddy current separation technology?

How effective are current systems and can they feasibly be improved on?

Do certain non-ferrous metals have a higher capability of been pushed further forward.

Do large bits of waste get thrown further than small bits of waste?
 
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I'm sorry you are not finding help at the moment. Is there any additional information you can share with us?
 
I saw this kind of separation only on a belt conveyor for coal handling in a fossil power station.
See [for instance]:
http://www.sgt-promati.com/Nederlands/Downloads/Pdf/Non-ferro/SB500%20UK4%20ECS%20ENGLISH.pdf
 
Last edited by a moderator:
owen2612 said:
where would the best place to look for information on Eddy current separation technology?
Search the web and the trade specific equipment suppliers.

owen2612 said:
How effective are current systems and can they feasibly be improved on?
Some are good and some can be improved. That is the way of the world. There is no simple answer.
The characteristics of the shredder before the separator needs to be matched to the separator. You must find the lowest cost solution by adjusting both systems to work together.

owen2612 said:
Do certain non-ferrous metals have a higher capability of been pushed further forward.
Yes, the electrical conductivity, magnetic properties and density are all important.

owen2612 said:
Do large bits of waste get thrown further than small bits of waste?
Mass rises as the cube of the dimension, surface area as the square. The eddy currents are induced only in the surface area. The material, shape and orientation have a big effect on the trajectory.
 

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