Acoustic magnet swarf slurry (AMSS) has 1900 tons production worldwide. The composition of AMSS contained 12.45% neodymium, 34.35% iron, 0.48% boron and 52.5% of cooling reagent. Removing cooling reagent and decreasing iron dissolution percent were achieved by oxidation roasting and selective leaching. Selective leaching removed 89% of iron with parameter of 0.5M HCl, solid-liquid ratio equal to 1:100, 4 hours at 95?. The rest of iron was separated by solvent extraction with Aliquat 336 as extractant. The optimal parameters of extracting iron were 0.1M A336, 3M chloride ion, aqueous-organic ratio equal to 1:3 and mixed for 1 minute. Oxalic acid added to solution after solvent extraction to precipitate neodymium. The final product was neodymium oxidize with 99% of purity by calcined neodymium oxalate at 900? for 0.5 hour. The recovery percent of neodymium was 99%.
|Journal||E3S Web of Conferences|
|Publication status||Published - 2018 Sep 14|
|Event||3rd International Conference on Advances in Energy and Environment Research, ICAEER 2018 - Guilin, China|
Duration: 2018 Aug 10 → 2018 Aug 12
All Science Journal Classification (ASJC) codes
- Environmental Science(all)
- Earth and Planetary Sciences(all)