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Laterite ores by pressed powder method

AppNote XRF1052: analysis of laterite ores by pressed powder method

Background

Nickel laterite is one of the two types of ores for nickel extraction. The other type of ore is sulfide. Currently, 40% of the world’s nickel production is obtained from laterite ores. Its share is however likely to increase since most ore reserves and a majority of nickel mining projects currently under development are laterite deposits.

In nickel laterite mining, nickel and cobalt are target metals that represent ore grade. Iron and magnesium in laterite ore are indicative elements to determine extraction method, which is hydrometallurgical or pyrometallurgical process. In modern resource industries, demand for accurate and quick determination of elements in ores is increasing in order to efficiently operate mining and processing.

Wet chemical analysis, which is the traditional analytical technique for elemental determination, requires time and expertise for sample preparation and is therefore not suited for the rapid analysis of large number of samples. X-ray fluorescent spectrometry (XRF) with pressed powder method can overcome these problems.

For the analysis of laterites by XRF, to detect trace amount of cobalt, high spectral resolution is required since a large iron peak is present adjacent to the cobalt peak in the spectrum. In addition, high sensitivity is required for the analysis of light elements such as magnesium. Wavelength dispersive XRF (WDXRF) can meet both of these requirements. This note demonstrates an improved method to determine multiple elements in nickel oxide ores by pressed powder method.

WDXRF products from Rigaku

Benchtop tube below sequential WDXRF spectrometer analyzes O through U in solids, liquids and powders

High power, tube above, sequential WDXRF spectrometer with new ZSX Guidance expert system software

High-power, tube-below, sequential WDXRF spectrometer with new ZSX Guidance expert system software

High power, tube below, sequential WDXRF spectrometer with Smart Sample Loading System (SSLS)

High power, tube above, sequential WDXRF spectrometer

WDXRF spectrometer designed to handle very large and/or heavy samples

High-throughput tube-above multi-channel simultaneous WDXRF spectrometer analyzes Be through U

WDXRF ultra low sulfur analyzer for method ASTM D2622

ASTM D2622 method WDXRF analyzer for sulfur (S) in petroleum fuels and ULSD

Tube below, single element WDXRF analyzer for quality control applications