Eddy Current Separator with Rotating Palette for Fine Copper Wire
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Solution Overview
Problem
Eddy current separation methods struggle to achieve high purity sorting of small-sized conductive materials, such as fine copper wire, due to insufficient thrust force and intermingling with non-conductive materials, especially when the distance between the conductive material and the magnet is significant, leading to poor separation efficiency.
Innovation Solution
An eddy current separation apparatus featuring a rotating magnetic circular plate with alternating polarity permanent magnets, a palette with a small clearance from the magnets, and a control unit that manages the supply and discharge of materials to extend the thrust force application time, ensuring high purity separation of small conductive materials without enlarging the apparatus size or reducing throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the distance between the conductive material and the magnet is increased, then the apparatus structure becomes simpler, but the thrust force decreases significantly
Solution Approach 1:
The conductive material is pre-positioned on the palette surface before the rotating magnetic field is applied, ensuring optimal initial placement close to the magnet surface. This preliminary positioning maximizes the thrust force generation during the subsequent separation process, allowing effective separation even with small-sized materials
Solution Approach 2:
The palette rotates continuously within the magnetic field, maintaining constant contact or near-contact between the conductive material and the magnetic field source. This continuous action ensures sustained thrust force application throughout the rotation cycle, preventing loss of separation effectiveness
2Manufacturing precision
If the thrust force application time is extended, then the separation purity improves, but the throughput decreases
Solution Approach 1:
The separation process utilizes periodic rotation of the palette, where each rotation cycle represents one complete separation operation. By optimizing the rotation speed and cycle timing, the system achieves multiple separation cycles per unit time, simultaneously improving purity through repeated action while maintaining high throughput through efficient cycle management
Solution Approach 2:
The palette rotation speed is dynamically adjusted based on material properties and separation requirements. Faster rotation speeds increase throughput for materials requiring less separation time, while slower speeds enhance purity for difficult-to-separate materials, allowing flexible optimization of the purity-throughput tradeoff
3Manufacturing precision
If the apparatus size is enlarged to improve separation of small materials, then the separation effectiveness increases, but the device complexity and space requirement increase
Solution Approach 1:
The magnetic field is concentrated in a localized region directly above the palette surface, creating a high-intensity separation zone where small conductive materials can be effectively processed. This localized field concentration achieves high separation effectiveness without requiring a large overall apparatus structure
Solution Approach 2:
The palette serves as an intermediary carrier between the magnetic field source and the conductive materials. By positioning the palette at an optimal distance from the magnet and rotating it within the magnetic field, the system achieves effective thrust force application on small materials without requiring the apparatus components to be in direct contact, thus avoiding excessive size enlargement
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
The apparatus effectively sorts small-sized conductive materials with high purity by optimizing the thrust force application time and minimizing intermingling, allowing for efficient separation of fine copper wire and other small conductive materials without increasing the apparatus size or reducing throughput.
Implementation Method 1
an alternating magnetic field is applied to the electrically conductive material, an eddy current is generated inside of the electrically conductive material, and the conductors are sorted out by the interaction of electric current and magnetic field
Implementation Method 2
The alternating magnetic field creates an eddy current in a conductive material. The conductive material receives a thrust force which is created by the eddy current
Implementation Method 3
the conductors are sorted out by the interaction of electric current and magnetic field. Thrust forces based on the electromagnetic power are imparted to the conductors
Data Source
Figure 1
Figure 2~3
Figure 4A~4D
AI summary
An eddy current separation apparatus includes: a rotating magnetic circular plate having a plurality of permanent magnets with alternating polarity, the magnets arranged in a circumferential direction; a palette arranged next to the rotating magnetic circular plate with a clearance; an actuator section having a rotating shaft fixed with the rotating magnetic circular plate; a feed section containing a product to be separated and supplying a predetermined quantity of the product to be separated to the palette; a discharge section having two containers for recycling and collecting the product to be separated supplied from the feed section to the palette in the containers for recycling; and a control unit controlling the rotating magnetic circular plate, the actuator section, the feed section and the discharge section; wherein the eddy current separation apparatus performs; a first step in which the feed section supplies a predetermined quantity of the product to be separated to the palette, a second step in which the discharged section is switched to the open position from the closed position after the first step is finished and a fixed time is passed, and a third step in which the discharged section is switched to the closed position after the second step has been finished, further wherein the eddy current separation apparatus performs from a first step to a third step again after the third step has been finished.