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

Rock and Mineral Analysis > 2018 > 37(6): 687-694. > DOI: 10.15898/j.cnki.11-2131/td.201711230185

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

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Preparation and Certification of Niobium-Tantalum Concentrate Reference Materials

Xiao-liang ZHAO^1,2,,
Zhi-wei LI^1,2, ,,
Ye WANG^1,2,
Jun-yu WANG^1,2,
Wei-lu ZHONG^1,2,
Yan CHEN^1,2

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

Received Date: November 22, 2017
Revised Date: May 26, 2018
Accepted Date: June 10, 2018
Published Date: October 31, 2018

Abstract

HIGHLIGHTS
(1) Representative niobium-tantalum concentrate was selected as the candidate of niobium-tantalum concentrate standard materials.

(2) The particle size of the standard material candidate can be guaranteed by air-jet crushing and high-alumina ball grinding.

(3) The standard substance of niobium-tantalum concentrate constituted a relatively complete content system from coarse concentrate to concentrate.

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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