Continuous heavy medium recovery by high gradient magnetic separation (HGMS)

Kelland, D.

doi:10.1109/tmag.1984.1063146

Cited by 4 publications

(1 citation statement)

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“…Since then, a great deal of attention has been placed on this separation process because of its particular ability to retain and segregate particles of relatively weak magnetism and microscopic size. For example, HGMS has other proven applications in the beneficiation of minerals such as coal, ,− tin, , bauxite, and rare metal ores. , It also has proven applications in waste reclamation and recycling and in the ultrapurification of chemical refractories and powders. − Other applications of HGMS include environmental remediation and nuclear waste treatment, ,− particularly as a downstream collector of magnetically seeded nonmagnetic particles and ionic species. ,,,− An excellent example of this kind of HGMS technology is the SIROFLOC process . The versatility of HGMS has also allowed for its expansion into phase separations, ,− as well as into more novel uses such as the separation and segregation of biomolecules and cells by using bio-labeled magnetic carriers, − a growing area.…”

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confidence: 99%

Concentrating Dilute Sludge Wastes with High-Gradient Magnetic Separation: Breakthrough Experiments and Performance

Ebner

Ritter

2002

Ind. Eng. Chem. Res.

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High-gradient magnetic separation (HGMS) was successfully investigated for the concentration of dilute sludge wastes using a 0.3-T bench-scale system. Breakthrough curves for four different sludges containing a blend of paramagnetic metal hydroxides and oxides were measured at different feed velocities (0.0367-0.2754 cm s -1 ) and suspended insoluble solids feed concentrations (2.5-10.5 g L -1 ). With the aid of a dynamic model fitted to each of the breakthrough curves, the best bed utilizations of the HGMS unit and the highest enrichments of the feed were, respectively, on the order of 77% and 14 for the runs with lower feed velocities and concentrations. These results also corresponded to the HGMS unit producing on the order of 20 bed volumes of effluent free of suspended insoluble solids prior to breakthrough. Overall, the performance of the HGMS unit for this type of process was considered to be quite good, given the broad range of particle sizes, magnetic susceptibilities, and molecular species in each sludge waste. These results suggest that HGMS can be used as an effective and alternative treatment method for the concentration of a variety of dilute waste streams containing suspended solids of a diverse nature.

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