Preparation and Certification of Niobium-Tantalum Concentrate Reference Materials

Xiao-liang ZHAO; Zhi-wei LI; Ye WANG; Jun-yu WANG; Wei-lu ZHONG; Yan CHEN

doi:10.15898/j.cnki.11-2131/td.201711230185

2018 Vol. 37, No. 6

Article Contents

Article navigation > Rock and Mineral Analysis > 2018 > 37(6): 687-694

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Xiao-liang ZHAO, Zhi-wei LI, Ye WANG, Jun-yu WANG, Wei-lu ZHONG, Yan CHEN. Preparation and Certification of Niobium-Tantalum Concentrate Reference Materials[J]. Rock and Mineral Analysis, 2018, 37(6): 687-694. doi: 10.15898/j.cnki.11-2131/td.201711230185

Citation:

Xiao-liang ZHAO, Zhi-wei LI, Ye WANG, Jun-yu WANG, Wei-lu ZHONG, Yan CHEN. Preparation and Certification of Niobium-Tantalum Concentrate Reference Materials[J]. Rock and Mineral Analysis, 2018, 37(6): 687-694. doi: 10.15898/j.cnki.11-2131/td.201711230185

Preparation and Certification of Niobium-Tantalum Concentrate Reference Materials

1.
Rock and Mineral Analysis Center of Henan Province, Zhengzhou 450012, China
2.
Henan Mineral Processing and Biological Beneficiation Engineering Research Center, Zhengzhou 450012, China

More Information

Corresponding author: Zhi-wei LI, lzwstudent@163.com

Received Date: 23 November 2017

Revised Date: 27 May 2018

Accepted Date: 11 June 2018

Abstract

Abstract

BACKGROUNDNiobium-tantalum concentrate reference materials play an important role in monitoring mineral smelting and sample analysis. There is a great demand of niobium-tantalum concentrate reference materials in the dressing plant and metallurgical system, but no domestic and foreign literature has reported these materials. The nature of niobium-tantalum mineral determines the crushed grain size and homogeneity of the niobium-tantalum concentrate and puts forward higher requirements for the development of a niobium-tantalum concentrate standard substance. OBJECTIVESTo develop the four standard materials of niobium-tantalum concentrate with different contents. METHODSThe preparation process of niobium-tantalum concentrate reference materials is introduced. Niobium-tantalum concentrate samples collected from the Yichun and Nigeria selection plant were finely milled and mechanically mixed by air milling and high-alumina ball milling. The packaged samples were randomly selected for homogeneity and stability testing and determined values. The homogeneity and stability of the samples were tested by Inductively Coupled Plasma-Optical Emission Spectrometry/Mass Spectrometry (ICP-OES/MS). RESULTSTwelve elements of different samples are detected by the different analytical methods, with a calibration method for collaborative testing in multiple laboratories, the certified value and uncertainty of each element are given. The samples have good uniformity and stability. CONCLUSIONSThe contents of Ta(Nb)₂O₅ in the four antimony concentrates are 9.89%, 20.55%, 40.79% and 53.69%, respectively, forming a complete system from crude concentrates to concentrates, which meets the sample requirements for reference materials in the stages of metallurgical tests.
- niobium-tantalum concentrate /
- reference materials /
- standard values /
- uncertainty /
- uniformity /
- stability /
- certified values

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