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dc.contributor.advisorTaylor, Patrick R.
dc.contributor.authorOtt, Brandon
dc.date.accessioned2018-12-07T16:26:37Z
dc.date.accessioned2022-02-03T13:11:31Z
dc.date.available2019-12-05T16:26:38Z
dc.date.available2022-02-03T13:11:31Z
dc.date.issued2018
dc.identifierOtt_mines_0052N_11625.pdf
dc.identifierT 8618
dc.identifier.urihttps://hdl.handle.net/11124/172800
dc.descriptionIncludes bibliographical references.
dc.description2018 Fall.
dc.description.abstractNeodymium-iron-boride magnet recycling by applying mineral processing practices of liberation and separation to hard disk drives is designed, discussed, and evaluated. Magnetic material, observed to be brittle, is liberated from the hard drive constructed mostly of malleable metals by preferential degradation of the magnet material. The process developed is shown to recover greater than ninety-five percent of the neodymium-iron-boride magnet material in the feed with a product grade of up to over 80 percent magnet material by mass. The process is designed to co-produce stainless steel, aluminum, nickel alloy, carbon steel, and printed circuit board concentrates as contributors to the recycle value of hard drives. The value of materials enclosed in hard drives is explored and discussed. Economic evaluation of this process, including estimation of capital and operating expenditures coupled with revenue based on demonstrated recovery of valuable materials, shows a positive net present value at various depreciation rates up to thirty percent.
dc.format.mediumborn digital
dc.format.mediummasters theses
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado School of Mines. Arthur Lakes Library
dc.relation.ispartof2018 - Mines Theses & Dissertations
dc.rightsCopyright of the original work is retained by the author.
dc.subjectHDDs
dc.subjectrare earth magnets
dc.subjecthard drive recycling
dc.subjectrare earth recycling
dc.subjectpreferential degradation
dc.titleExperimental methods of flowsheet development for hard drive recycling by preferential degradation and physical separation
dc.typeText
dc.contributor.committeememberSpiller, D. Erik
dc.contributor.committeememberAnderson, Corby G.
dcterms.embargo.terms2019-12-05
dcterms.embargo.expires2019-12-05
thesis.degree.nameMaster of Science (M.S.)
thesis.degree.levelMasters
thesis.degree.disciplineMetallurgical and Materials Engineering
thesis.degree.grantorColorado School of Mines
dc.rights.accessEmbargo Expires: 12/05/2019


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