Accuracy Research of Minerals with High Loss of Ignition during X-ray Fluorescence Spectrometry Semi-quantitative Analysis

Da-yong LI; Zhi-xiong ZHU; Jing LI; Liang WANG

doi:10.15898/j.cnki.11-2131/td.201903080034

2020 Vol. 39, No. 1

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Da-yong LI, Zhi-xiong ZHU, Jing LI, Liang WANG. Accuracy Research of Minerals with High Loss of Ignition during X-ray Fluorescence Spectrometry Semi-quantitative Analysis[J]. Rock and Mineral Analysis, 2020, 39(1): 135-142. doi: 10.15898/j.cnki.11-2131/td.201903080034

Citation:

Da-yong LI, Zhi-xiong ZHU, Jing LI, Liang WANG. Accuracy Research of Minerals with High Loss of Ignition during X-ray Fluorescence Spectrometry Semi-quantitative Analysis[J]. Rock and Mineral Analysis, 2020, 39(1): 135-142. doi: 10.15898/j.cnki.11-2131/td.201903080034

Accuracy Research of Minerals with High Loss of Ignition during X-ray Fluorescence Spectrometry Semi-quantitative Analysis

Guizhou Central Laboratory of Geology and Mineral Resources, Guiyang 550018, China

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Corresponding author: Zhi-xiong ZHU, 2366635624@qq.com

Received Date: 08 March 2019

Revised Date: 05 July 2019

Accepted Date: 16 July 2019

Abstract

Abstract

BACKGROUNDThe SQX, X-ray fluorescence spectrometry semi-quantitative analysis software, was used to analyze an unknown sample. The software can analyze the range of ⁹F-⁹²U elements, but cannot directly analyze the parameters such as H₂O and C. Employing the balanced normalized calculation to test a special sample, such as bauxite with high loss of ignition and high crystalliferous water content, carbonate minerals with higher CO₂ content, sulfide metal minerals with higher sulfur and carbon content, the analysis results for main elements like Al₂O₃, SiO₂, CaO, MgO and Fe are largely affected by undetermined parameters resulting in low accuracy of semi-quantitative analysis data. OBJECTIVESTo propose a new calibration mode through experimental research. METHODSThe calibration mode quantitatively and selectively analyzes the parameters such as loss of ignition, crystalliferous water, carbon dioxide and sulfur of an unknown sample, based on the preliminary results of semi-quantitative analysis. By putting the quantitative analysis result into SQX, the new semi-quantitative analysis results were obtained by using the second equilibrium normalization calculation. RESULTSThe experimental results show that the average accuracy of multi-element in bauxite, carbonate minerals and sulfide metal minerals was increased by 2.6 to 4.5 times using this calibration mode. CONCLUSIONSThe method can quickly and accurately determine multi-element in minerals with high loss of ignition, including bauxite, carbonate minerals, and sulfide metal minerals.
- bauxite /
- carbonate minerals /
- sulfide metal ore /
- X-ray fluorescence spectrometry /
- semi-quantitation

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References

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