Preparation of Standard Materials for Composition Analysis of Stone Coal Vanadium Ore

TIAN Zong-ping; PENG Jun; WANG Gan-zhen; YI Xiao-ming; CAO Jian; QIN Yi

doi:10.15898/j.cnki.11-2131/td.202001070008

Rock and Mineral Analysis > 2021 > 40(1): 111-120. > DOI: 10.15898/j.cnki.11-2131/td.202001070008

TIAN Zong-ping, PENG Jun, WANG Gan-zhen, YI Xiao-ming, CAO Jian, QIN Yi. Preparation of Standard Materials for Composition Analysis of Stone Coal Vanadium Ore[J]. Rock and Mineral Analysis, 2021, 40(1): 111-120. DOI: 10.15898/j.cnki.11-2131/td.202001070008

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Preparation of Standard Materials for Composition Analysis of Stone Coal Vanadium Ore

Hunan Province Geological Testing Institute, Changsha 410007, China

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Received Date: January 09, 2020
Revised Date: September 25, 2020
Accepted Date: November 10, 2020
Published Date: January 27, 2021

Abstract

HIGHLIGHTS
(1) The V₂O₅ content of the stone coal vanadium ore covered the content range of the stone coal vanadium ore with various grades.

(2) A total of 16 components in stone coal vanadium ore including ore elements, trace elements and harmful elements were certified.

(3) The sample was prepared with a new alloy grinding disc, and indirect measurement of source for vanadium pentoxide was used.

ABSTRACT

BACKGROUNDThe development and rational utilization of stone coal vanadium ore resources require accurate analysis of its components and quality control. At present, there is no standard material for composition analysis of vanadium ore in the world, and the existing standard material cannot meet the needs of exploration, development and research of vanadium ore in China, either in the content of vanadium pentoxide or in the certified values of other elements.
OBJECTIVESTo prepare standard materials for composition analysis of stone coal vanadium ore.
METHODSOre samples, roof and floor rocks and artificially stripped high-grade samples were collected from four large stone coal vanadium districts, including Xiaoyuanchong vanadium mine in Chongyang County, Hubei Province, the Niuguuping in Zhijiang County, Hunan Province, the Yantouzhai in Guzhang County, Hunan Province, and the Heichong in Fenghuang County, Hunan Province. The samples were subjected to jaw-type primary crushing, roller crushing, coarse-grain sieving and mixing, ore blending and mixing, disc fine grinding, fine-grain sieving, and inactivation. After passing the initial inspection, samples were bottled and numbered.
RESULTSFor the uniformity test of randomly selected 4×35 bottles, the measured values of F were all less than F_0.05(34, 70)=1.60, and the relative standard deviation was between 0.31% and 7.48%, indicating good uniformity of the samples. Long-term and short-term stability tests were carried out on randomly selected samples, and no statistically significant difference was found, indicating good stability of the samples. Nine laboratories participated in the collaborative certified value research, which included 16 components such as V₂O₅, C and SiO₂. Mass fractions of V₂O₅ in the four stone coal vanadium ore standard materials were 0.63%, 0.86%, 1.55%, 3.99%, covering cut-off grade of 0.50%, industrial grade of 0.70%, and rich-ore grade of ≥ 1%. Carbon contents of four standard materials were 2.40%, 3.46%, 5.60% and 7.27%, respectively.
CONCLUSIONSThe successful development of 4 standard substances (GBW07875, GBW07876, GBW07877, GBW07878) in this batch can provide reference for scientific utilization and research of stone coal vanadium ore.
- stone coal vanadium ore,
- reference materials,
- component analysis,
- certified values

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