Magnetic Sorting Apparatus With Rotating Belt Guide Roll
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional magnetic separators face challenges in efficiently separating ferromagnetic particles from a thick layer of powder and granular material, leading to reduced treatment speed and increased costs due to agglomeration and complex separation processes, especially when dealing with large amounts of material.
Innovation Solution
A magnetic separator design featuring a belt conveyer system with rotating magnets inside the belt guide roll, where adjacent magnetic poles alternate in the circumferential direction and are the same in the width direction, creating a uniform magnetic field that changes in strength and direction at high frequencies, facilitating the separation of ferromagnetic particles from non-magnetic particles by altering the attractive force and torque on the ferromagnetic particles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a thick layer of powder and granular material is supplied to the conveyer belt to increase treatment capacity, then productivity increases, but separation efficiency deteriorates due to agglomeration and enclosure of non-magnetic particles by ferromagnetic particles
Solution Approach 1:
The patent applies dynamics by making the magnetic field movable through rotation of the belt guide roll with embedded magnets, transforming the static magnetic field into a dynamic one that moves with the conveyer belt. This dynamic magnetic field continuously changes the attractive force on ferromagnetic particles, preventing agglomeration and enabling effective separation even in thick material layers, thus resolving the contradiction between productivity and separation efficiency
Solution Approach 2:
The patent implements periodic action through the rotational movement of the belt guide roll, which creates a periodically changing magnetic field as magnets pass by. This periodic variation in magnetic attractive force prevents ferromagnetic particles from maintaining constant contact with non-magnetic particles, reducing agglomeration effects and improving separation efficiency while maintaining high treatment capacity
2Manufacturing precision
If the particle diameter of the powder and granular material is reduced by mechanical crushing to improve liberation, then separation efficiency improves, but treatment cost and complexity increase
Solution Approach 1:
The patent changes the parameter of magnetic field motion from static to dynamic through rotation of the belt guide roll. This parameter change enables the magnetic field to effectively interact with particles of various sizes without requiring extreme micronization, thereby improving separation efficiency while avoiding the complexity and costs associated with extensive mechanical crushing processes
3Manufacturing precision
If the particle diameter is reduced by heat treatment to improve liberation, then separation efficiency improves, but energy consumption and process time increase
Solution Approach 1:
The patent replaces thermal processing with a mechanical/dynamic magnetic field approach. By rotating the belt guide roll to create a moving magnetic field, the system achieves particle separation without the high energy consumption and extended process times required by heat treatment methods, thus improving separation efficiency while reducing energy usage
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
This approach enables efficient magnetic separation of ferromagnetic particles from a thick layer of powder and granular material at high speeds, reducing waste fluid disposal costs and simplifying the separation process, while maintaining high separation efficiency and productivity.
Implementation Method 1
a magnetic field application device provided with a plurality of magnets disposed inside the guide roll
Implementation Method 2
the magnetic forces of the magnets 22 inside the belt guide roll 21 act on the powder and granular material a
Implementation Method 3
ferromagnetic particles attracted by the magnets 22
Data Source
Figure 1(A)~1(D)
Figure 2
Figure 3
AI summary
A magnetic separator and a magnetic separation method are provided, where ferromagnetic particles are separated from a powder and granular material containing the ferromagnetic particles efficiently and magnetic separation is performed at a low cost without the need for complicated steps and waste fluid disposal. A magnetic separator according to the present invention includes a conveyer belt to carry a powder and granular material containing ferromagnetic particles, a rotatable hollow belt guide roll having an outer circumference partly wound with the above-described or an other conveyer belt, and a magnetic field application device disposed inside the belt guide roll, wherein the magnetic field application device includes a plurality of magnets inside the belt guide roll, and the ferromagnetic particles are separated in a magnetic field generated by the magnetic field application device. The magnets are arranged in such a way that magnetic poles adjacent in the circumferential direction of the belt guide roll are different from each other and, in addition, are arranged in such a way that adjacent magnetic poles in the width direction of the belt guide roll have the same polarity.