Recovery Process Development for the Rare Earths from Permanent Magnet Scraps Leach Liquors

• DOI: 10.5935/0103-5053.20150077
• Publication Date: 2015-04-01T14:16:18Z
• Authors: Ho-Sung Yoon; Chul-Joo Kim; Kyeong W. Chung; Sung-Don Kim; Jyothi R. Kumar
• Keywords: recovery; recovery; dysprosium; neodymium; permanent magnets scraps; D2EHPA; 0211 other engineering and technologies; dysprosium; permanent magnets scraps; D2EHPA; 02 engineering and technology; neodymium

The current study deals with the recovery process development for rare earths (REs), i.e., dysprosium (Dy) and neodymium (Nd), metals from permanent magnet scraps leach liquors.Its main objective is of (Dy Nd) (PMSs).Introdutory experiments were carried out to get liquor solution: oxidation/roasting, acid leaching, precipitation methods implemented PMSs dissolution.The obtained was diluted ten times used present study.Di-2-ethylhexyl phosphoric (D2EHPA) as an extractant REs kerosene diluent system.The optimized various experimental parameters such time influence on extraction process, pH, concentration, separation factors calculated, scrubbing, stripping, maximum loading capacity extractant, phase ratios well separations.Loading D2EHPA selective stripping developed targeted metal ions by using mineral acids hydrochloric, sulfuric nitric acids.The content analysis in aqueous samples determined inductively coupled plasma optical emission spectrometer (ICP OES) sensitive accurate data.