Oscillating Magnet Magnetic Separator for MRF Material Recovery
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Solution Overview
Problem
Current magnetic separation technologies in Material Recycling Facilities (MRFs) result in partial separation of metallic and non-metallic materials, leading to entrapped non-metallic materials and increased capital and maintenance costs due to the need for multiple magnetic separators and secondary processing.
Innovation Solution
A magnetic separator system with an upper conveyor and oscillating magnet that separates metallic materials from non-metallic materials by flipping the metallic materials, allowing non-metallic materials to fall back to a lower conveyor, thereby eliminating the need for additional magnetic equipment and secondary processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional magnetic separators are used, then metallic materials are captured, but non-metallic materials become entrapped with the metallic materials
Solution Approach 1:
The magnet is made oscillating rather than stationary, creating dynamic magnetic fields that selectively capture metallic materials while allowing non-metallic materials to remain mobile and be discharged. This dynamic approach enables the system to differentiate between material types based on their magnetic response characteristics.
Solution Approach 2:
The oscillating magnet creates mechanical vibrations and movements in the captured materials. This vibration causes entrapped non-metallic materials to be loosened and discharged from the magnetic field, while metallic materials remain securely captured due to their magnetic properties.
2Manufacturing precision
If multiple magnetic separators are installed in sequence to reduce entrapped materials, then separation quality improves, but capital investment and maintenance costs increase significantly
Solution Approach 1:
A single magnetic separator is designed to perform multiple functions: capturing metallic materials, vibrating captured materials to release non-metallic contaminants, and discharging purified metallic materials. This multi-functional design eliminates the need for multiple separate magnetic separators while achieving superior separation quality.
Solution Approach 2:
The oscillating mechanism and magnetic separation functions are combined into a single integrated system. The oscillation feature is incorporated directly into the magnet structure, allowing one device to perform what previously required multiple separate devices.
3Manufacturing precision
If multiple magnetic separators are used to achieve clean separation, then metallic material purity increases, but the system footprint and ongoing maintenance costs increase
Solution Approach 1:
The single oscillating magnetic separator performs all separation functions in one compact unit, capturing metallic materials, vibrating to release non-metallic contaminants, and discharging purified materials. This eliminates the need for multiple separate devices and reduces the overall process footprint while maintaining high metallic material purity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively captures metallic materials without entrapping non-metallic materials, increasing the value of recycled materials and the tons per hour (TPH) return on investment (ROI) by improving separation efficiency and reducing equipment requirements.
Implementation Method 1
at least one magnet extending along a length of the upper conveyor to transfer metallic materials from the comingled materials to the upper conveyor
Implementation Method 2
an oscillator for moving along the at least one magnet in a reversing motion across a width of the upper conveyor causing the metallic materials to flip over and over
Implementation Method 3
The upper conveyor is extended beyond a discharge point of the lower conveyor so that when the metallic materials reach the end of the upper conveyor and are discharged by gravity, they fall into a separate collection area
Data Source
AI summary
A magnetic separator system includes a lower conveyor adapted to convey comingled materials to be separated and an upper conveyor disposed above the lower conveyor. The magnetic separator system also includes at least one magnet extending along a length of the upper conveyor to transfer metallic materials from the comingled materials to the upper conveyor. The magnetic separator system further includes an oscillator for moving along the at least one magnet in a reversing motion across a width of the upper conveyor causing the metallic materials to flip over and over and enabling non-metallic materials entrapped with the metallic materials to become separated from the metallic materials and fall to the lower conveyor.