Purification and conversion of Malaysian iron ores into industrial grade iron oxide colour pigment

Wong, Y.W. and Woon, H.S. and Tan, C.Y. (2014) Purification and conversion of Malaysian iron ores into industrial grade iron oxide colour pigment. Materials Research Innovations, 18 (S6). pp. 159-163.

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Abstract

This work proposes a method of converting local iron ores into colour pigments to add commercial and technical values to the commodity. Iron ores were subjected to hammer-crushing and two milling techniques (low-energy ball milling and high-energy milling) to produce submicron or ultrafine pigment particles. Effects of different milling duration, speed and charge type on the particle size were investigated. X-ray diffraction and energy-dispersive X-ray spectroscopy scans revealed that the ores contain hematite and goethite phases, with 54% of Fe and 35.38% of O. Particle size analysis showed that high-energy milling (14 hours, 11 mm charge, 550 rev min(-1)) was effective in producing particles as small as 1.379 mu m. Commision Internationale de l'Eclairage L* a* b* colour values measured were L* of 49.7, a* of 21.2 and b* of 15.8.

Item Type: Article
Funders: UNSPECIFIED
Uncontrolled Keywords: Iron ore; Hematite; Colour pigment; Ball milling; High-energy ball milling; Particle size; SSA; CIE L*a*b* colour values
Depositing User: Dr Mohd Faizal Hamzah
Date Deposited: 30 Dec 2015 08:54
Last Modified: 30 Dec 2015 08:54
URI: http://eprints.um.edu.my/id/eprint/15464

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