Physical and chemical characterization of Malaysian sulphide gold ore from east peninsular Malaysia
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Date
2018-06
Authors
Hud Mohamad Muzaffar
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Abstract
The sulphide ore samples are obtained from the High Grade Sulphide Ore
stockpile at Selinsing Gold Mine, Pahang. The method used on the site is grab sampling
by taking about 25-30 randomly chosen spots, below ½ of the stockpile height. The
samples are divided into bulk sample and 5 sieve size fractions: 90µm, 75µm, 50µm,
38µm and -38µm. Both bulk sample and the 5 size fractions were characterized using X Ray Fluorescence (XRF) and X-Ray Diffraction (XRD). The ore samples primarily
compose of quartz and K-feldspar (microcline). The main sulphide minerals are
chalcopyrite, stibnite, pyrrhotite and arsenopyrites. Bulk sample are subjected to fire
assay analysis, direct cyanide leaching and morphological study using optical microscope
and SEM/EDX of polish section. The gold was found associated with arsenopyrite,
stibnite and quartz. The head grade was found to be in the range of 0.954 g/T based on
fire assay result while direct cyanide leaching gives 83% recovery indicates that the
sulphide ore sample can be classified as partly refractory.