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- Title
草酸沉淀—等离子体发射光谱法测定稀土 精矿中的 REO, ThO<sub>2</sub> 和 ReO .
- Authors
杜桂荣; 刘 扬; 杜凯华; 卢 阳; 郭国龙
- Abstract
The determination of the total amount of rare earth oxides, thorium oxide content and rare earth oxide component in rare earth concentrate by oxalic acid precipitation- plasma emission spectrometry was studied. The rare earth concentrate was burnt to oxide after alkali melting and acid dissolving, and the amount of rare earth oxides and thorium oxide in the burning product was determined by gravimetric method. Then the products were dissolved with hydrochloric acid and the content of thorium oxide and rare earth oxides in the solution was determined by plasma emission spectrometry. The total amount of rare earth oxides were equal to the combined amounts of rare earth oxides and thorium oxide deducted the amount of thorium oxide. The results show that the sum of the rare earth oxides components determined by emission spectrometry is consistent with the total amount of rare earth oxides measured by gravimetric method. The total amount of rare earth oxides is39. 84%,and the relative standard deviation is 2. 59%. The determination values of REO-30(GSB04-3309-2016) and REO-50(GSB04-3311-2016) of two reference materials are consistent with the standard values. The method is reliable and stable. The method is suitable for the continuous determination of the total amount of rare earth oxides,thorium oxide content and rare earth oxide content in rare earth concentrates with the total amount of rare earth oxides≥20%.
- Subjects
INDUCTIVELY coupled plasma atomic emission spectrometry; THORIUM dioxide; OXALIC acid; HYDROCHLORIC acid; REFERENCE sources; RARE earth oxides
- Publication
Hydrometallurgy of China, 2023, Vol 42, Issue 1, p101
- ISSN
1009-2617
- Publication type
Article
- DOI
10.13355/j.cnki.sfyj.2023.01.017