Effects of Additives on Some Selected Properties of Base Sand

Saliu Ojo Seidu^1*, Bolarinwa Johnson Kutelu²

¹Department of Metallurgical and Materials Engineering, Federal University of Technology, Akure, Nigeria.
²Department of Mineral Resources Engineering, Federal Polytechnic Ado-Ekiti, Nigeria.

DOI: 10.4236/jmmce.2014.25051                

Abstract

In this study, effects of sawdust, coal dust and iron filling additives at varied proportions on some selected properties of moulding sand were investigated. Consequently, cylindrical specimens with different percentages of additives were prepared based on standard procedures. The prepared specimens were subjected to basic moulding sand testing including moisture content, bulk density, porosity, permeability, green compression strength and green shear strength using standard methods and equipment. From the obtained test results, all the experimental additives were found to improve the selected moulding properties of the base (silica) sand. Moulding sand specimen with sawdust additive revealed a relatively better compaction as compared to moulding sand specimens with coal dust and iron filling additives respectively. The moisture absorbing strength of the moulds was also found to increase with increasing percentage of sawdust. Addition of coal dust to the moulding sand was found to improve sand porosity and permeability which results in less casting defects, and due to improved moisture absorbing strength of sawdust, moulding sand specimens that contained sawdust were equally found to exhibit good compaction with maximum green compressive strength of 108.99 kPa. Also, the combination of 25% sawdust, coal dust and iron filling in the moulding sand was found to produce mould with optimum green shear strength value of 54.49 kPa.

Keywords

Moulding Sand, Sawdust, Coal Dust, Iron Filling, Porosity, Permeability, Bulk Density, Green Compressive Strength, Green Shear Strength

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	Adeleke, V.A. (2010) Effects of Addition of Iron (Fe) Filings to Green Moulding Sand on the Microstructure of Grey Cast Iron. Journal of the Brazilian Society of Mechanical Sciences and Engineering, XXXII, No. 2/175.
[2]	Deepak, C. (2008) Green sand Management—Role & Application of Carbonaceous Additives and Concept of Total Carbon in a Green Sand System. 68th World Foundry Congress, India, 127-132.
[3]	Paul, A. (2011) Effects of the Moisture Content on the Foundry Properties of Yola Natural Sand. Leonardo Electronic Journal of Practices and Technologies, 19, 85-96.
[4]	Aribo, S., Folorunso, D.O., Olaniran, O. and Oladele, I.O. (2009) Optimization the Green Compression Strength and Permeability of Green Sand Made from Epe Silica Sand. International Journal of science and Technology, 11, 101-126.
[5]	Beeley, P. (2001) The moulding Materials: Properties Preparation and Testing, Foundry Technology, Butterworth-Heinemann, 2nd Edition, 178-443.
[6]	Ameen, H.Z. and Hassan, K.S. (2011) Effect of the Sand Mould Additives on Some Mechanical Properties of Carbon Steel CK45 Casts. Journal of engineering, 17, 729-739.
[7]	Aramide, F.A., Aribo, S. and Folorunso, D.O. (2011) Optimizing the Moulding Properties of Recycled Ilaro Silica Sand. Leonardo Journal of Sciences, 19, 93-102
[8]	Mukherjees, P.C. (2003) Mould Section Material, Properties and Testing Fundamental of Metal Casting Technology. 703-754
[9]	Seidu, S.O. (2013) The Effect of Carbonaceous Materials as Mould Additives on White Cast Iron. Annals of Faculty of Engineering Hunedoara. International Journal of Engineering, 11, 85-88.