Effect of aluminum dross and rice husk ash on thermal and moulding properties of silica sand
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Date
2017
Authors
Ochulor, E.F.
Amuda, M.O.H.
Adeosun, S.O.
Balogun, S.A.
Journal Title
Journal ISSN
Volume Title
Publisher
Nigerian Journal of Technology (NIJOTECH)
Abstract
Moulding properties of foundry sand should be controlled so as to minimize casting defects. Its thermal characteristics
are vital in defining the solidification kinetics of a cast part, evolving microstructure and mechanical properties.
Modification of the thermal properties of the moulding sand mix is important in achieving desired structure and
mechanical properties in the cast component. This study investigates the incorporation of 2-12 wt. % aluminium dross
(AlDr) and 1-6 wt. % rice husk ash (RHA) in silica sand on moulding and thermal properties of the resulting sand mix.
Results show that RHA significantly reduced thermal conductivity of the moulding sand from 1.631-1.141 W/m. K (a 30%
reduction).However, AlDr increased its thermal conductivity from 1.631-1.787 W/m.K for 1-6 wt. % AlDr, which later
dropped progressively from 1.753-1.540 W/m.K for 8-12 wt. %. The moisture content increased abruptly from 4.0-4.2 %
for 6-8 wt. % AlDr addition but decreased from 4.0-2.8% for0-6 wt. % RHA addition in the moulding sand mix.
Description
Staff Publications
Keywords
Alluminum dross (AIDr) , Rice Husk ash (RHA) , Silica Sand , Moulding properties , Thermal properties , Sand mix , Research Subject Categories::TECHNOLOGY
Citation
Ochulor, E. F., Amuda, M. O. H, Adeosun, S. O., Balogun, S. A. (2017). Effect of aluminum dross and rice husk ash on thermal and moulding properties of silica sand. Nigerian Journal of Technology (NIJOTECH), 36(3):794 – 800