On the Influence and Correction of Water Content on pXRF Analysis of Lateritic Nickel Ore Deposits in the Context of Open Pit Mines of New-Caledonia

Minerals

Julien Gaschaud¹  Valérie Laperche²  Philippe Wavrer³  Thomas Quiniou⁴  Cyrille Metayer⁴ 

[1] Antea Group, 2–6, Place du Générale De Gaulle, 92160 Antony, France;Bureau de Recherches Géologiques et Minières (BRGM), 45060 Orleans, France;CASPEO, 45009 Orleans, France;Institut des Sciences Exactes et Appliquées-EA 7484, Université de la Nouvelle-Calédonie, CEDEX, 98851 Noumea, France;

关键词: pXRF;    mine;    nickel;    iron;    water content;    dilution law;   

DOI  :  10.3390/min12040415

来源: DOAJ

【 摘 要 】

In a number of applications, the use of portable X-ray fluorescence (pXRF) instruments offers a time and cost-saving alternative to standard laboratory instruments. This is particularly true in a mining context where decisions must be taken quickly in the field. However, pXRF is a technique known to be efficient, provided that samples are well prepared, i.e., dried and finely ground. On the mine face, little-to-no sample preparation is conceivable as mining vehicles must be able to operate continuously. Therefore, solutions have to be found even for raw materials and one of the most critical problems is the sample water content, in particular in the context of open pit mines in a tropical area. A large number of analysis shows that knowledge of humidity enables the measured concentration to be effectively corrected for the three instruments used (Niton, X-met, Titan). It is possible to overcome the difficulty of measuring water content in the field by fixing it to its maximum value (saturation). The results show that the saturation method is reliable, or at least, promising.

【 授权许可】

Unknown