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Minerals 2018, 8(8), 325; https://doi.org/10.3390/min8080325

Geometallurgical Approach to the Element-to-Mineral Conversion for the Nabbaren Nepheline Syenite Deposit

Department of Geoscience and Petroleum, Norwegian University of Science and Technology, Trondheim NO-7491, Norway
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Received: 31 May 2018 / Revised: 23 July 2018 / Accepted: 25 July 2018 / Published: 29 July 2018
(This article belongs to the Special Issue Geometallurgy)
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Abstract

Nabbaren nepheline syenite, a silica-deficient intrusive rock with low Fe content, was the industrial mineral deposit study case in this study. The quality of industrial mineral products are generally based on their bulk chemistry, which are directly related to their modal mineralogy and mineral chemistry; however, these are costly and time-consuming to determine. A geometallurgical-based methodology, known as element-to-mineral conversion (EMC), was applied to estimate its modal mineralogy based on its given bulk and mineral chemistry. EMC is a convenient and cost-effective technique, which can be used to quickly estimate modal mineralogy. Two EMC methodologies were applied: one least square based, LS-XRD, and one regression based, R-XRD. Additionally, average and specific mineral chemistries were used during estimations. The R-XRD method, a method not yet used for EMC purposes, gave better modal mineralogy estimations than LS-XRD. Considering the restrictions in the method, R-XRD shows potential for improvement and implementation at operational scale, making it a valuable geometallurgical tool for increasing resource performance, easing decision-taking processes, and reducing risks. The use of different mineral chemistries did not influence the modal mineralogy estimation, unlike the method used for it. View Full-Text
Keywords: ore characterization; element to mineral conversion; EMC; industrial minerals; nepheline syenite; case study; mineral chemistry; EPMA ore characterization; element to mineral conversion; EMC; industrial minerals; nepheline syenite; case study; mineral chemistry; EPMA
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Mena Silva, C.; Sørensen, B.E.; Aasly, K.; Ellefmo, S.L. Geometallurgical Approach to the Element-to-Mineral Conversion for the Nabbaren Nepheline Syenite Deposit. Minerals 2018, 8, 325.

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