Purification and conversion of Malaysian iron ores into industrial grade iron oxide colour pigment
Document Type
Article
Publication Date
1-1-2014
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.
Keywords
Iron ore, Hematite, Colour pigment, Ball milling, High-energy ball milling, Particle size, SSA, CIE L*a*b* colour values
Publication Title
Materials Research Innovations
Volume
18
Issue
S6
Publisher
Maney Publishing
Publisher Location
STE 1C, JOSEPHS WELL, HANOVER WALK, LEEDS LS3 1AB, W YORKS, ENGLAND