Determination of Nb and Ta in Nb-Ta Ore by Inductively Coupled Plasma-Optical Emission Spectrometry with a Combined Microwave Digestion Hydrofluoric Acid-resistant System

Sheng-feng MA; Hong-li WEN; Bing LI; Lei WANG; Yun ZHU

doi:10.15898/j.cnki.11-2131/td.2016.03.009

2016 Vol. 35, No. 3

Article Contents

Article navigation > Rock and Mineral Analysis > 2016 > 35(3): 271-275

Next Article Previous Article

Sheng-feng MA, Hong-li WEN, Bing LI, Lei WANG, Yun ZHU. Determination of Nb and Ta in Nb-Ta Ore by Inductively Coupled Plasma-Optical Emission Spectrometry with a Combined Microwave Digestion Hydrofluoric Acid-resistant System[J]. Rock and Mineral Analysis, 2016, 35(3): 271-275. doi: 10.15898/j.cnki.11-2131/td.2016.03.009

Citation:

Sheng-feng MA, Hong-li WEN, Bing LI, Lei WANG, Yun ZHU. Determination of Nb and Ta in Nb-Ta Ore by Inductively Coupled Plasma-Optical Emission Spectrometry with a Combined Microwave Digestion Hydrofluoric Acid-resistant System[J]. Rock and Mineral Analysis, 2016, 35(3): 271-275. doi: 10.15898/j.cnki.11-2131/td.2016.03.009

Determination of Nb and Ta in Nb-Ta Ore by Inductively Coupled Plasma-Optical Emission Spectrometry with a Combined Microwave Digestion Hydrofluoric Acid-resistant System

National Research Center for Geoanalysis, Beijing 100037, China

Received Date: 18 March 2015

Revised Date: 05 May 2016

Accepted Date: 20 May 2016

Abstract

Abstract

Niobium and tantalum in hydrofluoric acid can form a stable solution, and thus the Nb and Ta content of Nb-Ta ore can be determined accurately by Inductively Coupled Plasma-Optical Emission Spectrometry (ICP-OES) with a hydrofluoric acid resistant system. The determination method described in this paper for Nb and Ta in Nb-Ta ore, uses the microwave digestion mode of modular small tank and multiple digestion tank assembly (70 tank/group), and hydrofluoric acid resistant system of ICP-OES. This method shortens the dissolution time from 48 h to 1 h. By using a hydrofluoric acid medium the hydrolysis of high-level Nb and Ta in low acid concentration media is avoided. The detection limits of this method are 5.58 μg/g for Nb and 5.87 μg/g for Ta. The result of Nb-Ta concentrate with 19% Nb₂O₅ and 27% Ta₂O₅ is consistent with that acquired by the alkali fusion method and can be used to determine both high-grade and low-grade Nb-Ta ore with 42 μg/g-19% of Nb₂O₅ and 86 μg/g-27% of Ta₂O₅. The main advantage of this method is to accurately determine Nb and Ta in high-grade Nb-Ta ore.
- niobium-tantalum ore /
- niobium /
- tantalum /
- microwave melting /
- Inductively Coupled Plasma-Optical Emission Spectrometry /
- hydrofluoric acid-resistant system

FullText(HTML)

References

[1]	姚玉玲,吴丽琨,刘卫,等.乙醇增敏-电感耦合等离子体发射光谱法测定矿石及选冶样品中的铌钽[J].岩矿测试,2015,34(2):224-228. Google Scholar Yao Y L,Wu L K,Liu W,et al.Determination of Nb and Ta in Ores and Metallurgical Samples by Inductively Coupled Plasma Atomic Emission Spectrometry with Ethanol as a Sensitizer[J].Rock and Mineral Analysis,2015,34(2):224-228. Google Scholar
[2]	张军,陈慧连,曾宇斌.两种铌钽矿石消解方法的对比研究[J].广州化工,2014,42(10):120-121. Google Scholar Zhang J,Chen H L,Zeng Y B.A Comparative Study of Two Kinds of Niobium Tantalum Ore Digestion Method[J].Guangzhou Chemical Industry,2014,42(10):120-121. Google Scholar
[3]	李韶梅,王国增,赵军,等.电感耦合等离子体发射光谱法测定铌铁中铌和钽[J].冶金分析,2012,32(3):48-50. Google Scholar Li S M,Wang G Z,Zhao J,et al.Dermination of Niobium and Tantalum in Ferroniobium by Inductively Coupled Plasma Atomic Emission Spectrometry[J].Metallurgical Analysis,2012,32(3):48-50. Google Scholar
[4]	邵海舟,刘成花.电感耦合等离子体原子发射光谱法测定铌铁中铌钛钽硅铝磷[J].冶金分析,2011,31(12):54-57. Google Scholar Shao H Z,Liu C H.Determination of Niobium,Titanium,Tantalum,Silicon,Aluminium and Phosphorus in Ferroniobium Inductively Coupled Plasma Atomic Emission Spectrometry[J].Metallurgical Analysis,2011,31(12):54-57. Google Scholar
[5]	成勇,彭慧仙,袁金红,等.微波消解-电感耦合等离子体原子发射光谱法测定钒钛磁铁矿中锆铌钒铬[J].冶金分析,2013,33(3):50-54. Google Scholar Cheng Y,Peng H X,Yuan J H,et al.Determination of Zirconium,Niobium,Vanadium and Chromium in Vanadium Titano-Magnetite Ore by Microwave Digestion Inductive Coupled Plasma Atomic Emission Spectrometry[J].Metallurgical Analysis,2013,33(3):50-54. Google Scholar
[6]	倪文山,张萍,姚明星,等.微波消解-电感耦合等离子体原子发射光谱法测定矿石样品中铌钽[J].冶金分析,2010,30(8):50-53. Google Scholar Ni W S,Zhang P,Yao M X,et al.Inductively Coupled Plasma Atomic Emission Spectrometric Determination of Niobium and Tantalum in Ore Sample after Microwave Digestion[J].Metallurgical Analysis,2010,30(8):50-53. Google Scholar
[7]	崔爱瑞,张弘强.ICP-AES法测定精选铌钽矿中Nb₂O₅,ZrO₂以及高含量稀土总量[J].稀土,2009,30(6):71-73. Google Scholar Cui A R,Zhang H Q.Determination for High Content Nb₂O₅,ZrO₂,ΣREO in Niobium Tantalum Concentrate by ICP-AES[J].Chinese Rare Earths,2009,30(6):71-73. Google Scholar
[8]	王晓辉,郑诗礼,徐红彬,等.ICP-AES法测定难分解钽铌矿渣多种金属元素[J].光谱学与光谱分析,2009,29(3):805-808. Google Scholar Wang X H,Zheng S L,Xu H B,et al.Analysis of Metallic Elements in Refractory Tantalum-Niobium Slag by ICP-AES[J].Spectroscopy and Spectral Analysis,2009,29(3):805-808. Google Scholar
[9]	许涛,崔爱端,杜梅,等.稀土铌钽矿中铌、钽、锆量的电感耦合等离子原子发射光谱法测定[J].分析科学学报,2007,23(3):346-348. Google Scholar Xu T,Cui A D,Du M,et al.Determination of Nb,Ta and Zr in REE-Nb-Ta Ore by ICP-AES[J].Journal of Analytical Science,2007,23(3):346-348. Google Scholar
[10]	何红蓼,李冰,韩丽荣,等.封闭压力酸溶-ICP-MS法分析地质样品中47个元素的评价[J].分析试验室,2002,21(5):8-12. Google Scholar He H L,Li B,Han L R,et al.Evaluation of Determining 47 Elements in Geological Samples by Pressurized Acid Digestion-ICP-MS[J].Chinese Journal of Analysis Laboratory,2002,21(5):8-12. Google Scholar
[11]	张保科,温宏利,王蕾,等.封闭压力酸溶-盐酸提取-电感耦合等离子体质谱法测定地质样品中的多元素[J].岩矿测试,2011,30(6):737-744. Google Scholar Zhang B K,Wen H L,Wang L,et al.Quantification of Multi Elements in Geological Samples by Inductively Coupled Plasma Mass Spectrometry with Pressurized Decomposition Hydrochloric Acid Extraction[J].Rock and Mineral Analysis,2011,30(6):737-744. Google Scholar
[12]	闫欣,许荣华.等离子体质谱法测定岩石中的锆、铪、铌、钽[J].矿物岩石地球化学通报,2001,20(4):458-460. Google Scholar Yan X,Xu R H.Determination of Zr,Hf,Nb,Ta in Rocks by ICP-MS[J].Bulletin of Mineralogy,Petrology and Geochemistry,2001,20(4):458-460. Google Scholar
[13]	王蕾,张保科,马生凤,等.封闭压力酸溶-电感耦合等离子体光谱法测定钨矿石中的钨[J].岩矿测试,2014,33(5):661-664. Google Scholar Wang L,Zhang B K,Ma S F,et al.Determination of Wolfram in Tungsten Ore by Pressurized Acid Digestion-Inductively Coupled Plasma Atomic Emission Spectrometry[J].Rock and Mineral Analysis,2014,33(5):661-664. Google Scholar