Abstract—Sample and oven factors are important in determining the magnitude and uniformity of power absorption. In this research, the effect of sample and oven parameters such as sample volume and placement of sample on microwave heating of water and an iron ore material were studied and obtained data were compared. The results showed that for water heating, with increasing in sample volume from 200 to 1000 cm3 the microwave energy absorbed by water was increased from 71.27 to 100%, also with increasing in sample surface area from 50.24 to 78.50 cm2 the microwave, energy absorbed by water was increased from 76.36 to 89.09%. With increasing iron ore sample volume without increasing in surface area, the microwave absorption was constant whereas with increasing in sample surf ace area from 50.24 to 126.6 cm2, the microwave energy absorbed by iron ore was increased from 36.6 to 61.82%. The maximum temperature for iron ore material was occurred at 5.7 cm distance from the center whereas the maximum temperature for water sample was occurred at 5cm distance from the center .

Index Terms—Iron ore, microwave treatment, mineral processing, sample geometry.

K. Barani is with Mining Dept., Lorestan University, Khorramabad, (email:Irankianosh1356@yahoo.com).
S. M. J. Koleini and A. Khodadadi are with Mineral Processing Dept., Tarbiat Modares University, Tehran (email:Irankoleini@modares.ac.ir; adarban@modares.ac.ir).
B. Rezai is with Mining Engineering Dept., Amir Kabir University, Tehran, Iran (email:crezai1@yahoo.com).

Cite: K. Barani, S. M. J. Koleini, B. Rezai, and A. Khodadadi, "The Effect of Sample Geometry and Placement of Sample on Microwave Processing of Iron Ore," International Journal of Applied Physics and Mathematics  vol. 2, no. 2, pp. 131-134, 2012.