What is magnetic flux and its working principle?

October 11, 2023

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After the waste wires are processed by copper wire granulator, they usually need to be sorted, and magnetic fluid sorting is one of them. Magnetic fluid refers to a stable dispersed liquid that can magnetize under a magnetic field or the combined action of magnetic and electric fields, presenting a phenomenon of aggravation, and thus having a magnetic buoyancy effect on particles. Magnetic fluids typically use strong electrolyte solutions, paramagnetic solutions, and magnetic colloidal suspensions. The density of the magnetic fluid that appears to have increased is called apparent density, which is several times higher than the density of the medium. The apparent density of magnetic fluids can be adjusted arbitrarily by changing the intensity of the external magnetic field, magnetic field gradient, and electric field intensity. Placing solid waste in a magnetic fluid can effectively separate materials of any relative density by adjusting the apparent density of the magnetic fluid.


Magnetic fluid separation is a separation process that combines gravity and magnetic separation. Materials are separated according to density differences in heavy media, similar to gravity separation; In a magnetic field, materials are separated according to their magnetic differences, similar to magnetic separation. Therefore, both magnetic and non magnetic materials can be separated, as well as non magnetic materials can be separated according to their density differences. The magnetic fluid separation method holds a special position in the treatment and utilization of solid waste. It can not only separate various industrial waste residues, but also separate metals such as aluminum, copper, zinc, and lead from urban waste. For example, by placing aluminum rich waste that has undergone screening, wind sorting, and magnetic separation into a pool, the density of the aqueous solution is adjusted to allow aluminum to surface while other substances still settle at the bottom of the pool. This is a commonly used aluminum recycling method.