Magnetic Separation Systems

Fig. 6. Schematic of magnetic separation systems where N and S denote the poles of the magnets (a) plate and (b) grate magnet.

Superconducting High Gradient Magnetic Separator System, Erie2 Magnetics, Erie, Pa., 1991. 

M. G. Roe and G. R. Kenny. System and method for distinguishing an item from a group of items. US Patent 5 966 217, assigned to Magnetic Separation Systems, Inc. (Nashville, TN), October 12, 1999. 

The only systems used on an industrial scale so far are believed to be based on X-ray and IR, mainly for bottles, since the high cost of PET providing an incentive. X-ray absorption systems are made by National Recovery Technologies, USA, and Giovani, Italy. X-ray fluorescence detectors are made by Magnetic Separation Systems (MSS) and Asoma Instruments, both of the USA. 

An automated system developed by Magnetic Separation Systems, Inc. can segregate commingled plastic containers and remove contamination through the use of special sensors. First, a mechanical device debales the bottles and screens out small size and non-plastic contamination. The containers are then presented to an optical sensor which can identify PET, PP, natural and colored HDPE. Another sensor is used to further identify green and amber PET from clear PET containers, while a surface sensing x-ray based sensor identifies PVC containers. ... 

Magnetic separation of fines in cold-rolling solution. Magnetic separators are used to extend the life of cold-rolling solutions. The most effective systems use vertical or horizontal configurations of magnetic rods to remove metal fines. 

Throughout the development testwork, emphasis was placed on finding an effective reagent scheme that would produce a bulk concentrate with satisfactory tantalum, niobium and zircon recoveries. The Ta/Nb-Zr separation study concentrated mainly on magnetic separation. The floatability of Ta/Nb and Zr depend on type of collector, modifier and depressant system used. 

Chapman, P. A., and Cudjoe, K. S. (2001). Evaluation of BeadRetriever , an automated system for concentration of Escherichia coli 0157 from enrichment cultures by immuno-magnetic separation. /. Rapid Methods Automat. Microbiol. 9,203-214. 

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