title: Recycling of a fine, heavy fluff automobile shredder residue by density and differential fragmentation.
abstract: A compilation of the physical properties of materials which might typically occur in automobile shredder residue and an analysis of their suitability for the separation of materials in fine (<15mm) heavy fluff ASR (fhf-ASR) is presented. Differences in density and resistance to crushing of fhf-ASR materials were identified as potentially the most suitable low cost, technologically simple means for the separating this waste into its three principal components - metals, minerals (glass/stones) and organics (plastics). Results presented of laboratory scale tests demonstrate that fhf-ASR can in large part be separated into three principal components. Tests were conducted with 0.63-2.0mm and 2-10mm fractions. Recovery of plastics by density separations were conducted with water only jigs for the 2-10mm fraction and shaker tables for the 0.63-2mm fraction. Comparisons are presented of the separations of glass and stones from metals obtained by linear screening and vibratory screening of roller mill and impact mill crushing products of the high density 2-10mm fraction. Equipment used for these tests are of a laboratory or demonstrative scale. It is reasonable to anticipate that industrial scale processing would produce significantly better results. The 2-15mm fraction was found to constitute 91.6% of the fhf-ASR sampled. The metals content of the 2-10mm portion of this fraction was upgraded from 2.5% to 31% and 76.9% with recoveries varying inversely with grade from 91.9% to 40.1%. From 63.6% to 17.1% with a recovery of 93.5% of the organic materials. A residual product of fine sand of crushed glass/stones of 99.4% purity recovered 71.3% of these.
authors.affiliation: University of Oviedo, EIMEMO, School of Mining, Energy and Material Engineering of Oviedo, c/Independencia 13, Oviedo 33004, Spain. Electronic address: gentmalcolm@uniovi.es.
authors.forename: M R
authors.initials: MR
authors.lastname: Gent
authors.affiliation: University of Oviedo, EIMEMO, School of Mining, Energy and Material Engineering of Oviedo, c/Independencia 13, Oviedo 33004, Spain.
authors.forename: M
authors.initials: M
authors.lastname: Menéndez
authors.affiliation: University of Oviedo, EIMEMO, School of Mining, Energy and Material Engineering of Oviedo, c/Independencia 13, Oviedo 33004, Spain.
authors.forename: H
authors.initials: H
authors.lastname: Muñiz
authors.affiliation: University of Oviedo, EIMEMO, School of Mining, Energy and Material Engineering of Oviedo, c/Independencia 13, Oviedo 33004, Spain.
authors.forename: S
authors.initials: S
authors.lastname: Torno
mesh_terms: D001336:Automobiles; D003300:Copper / Q000302:isolation & purification; D005898:Glass; D008670:Metals / Q000302:isolation & purification; D059027:Recycling / Q000191:economics / Q000379:methods*; D013232:Steel; D014866:Waste Products
chemical_list: D008670:Metals; D014866:Waste Products; D013232:Steel; D003300:Copper
keywords: Automobile shredder residue fluff; Crushing; Density separation; Differential fragmentation; Recycling