IJSTR

International Journal of Scientific & Technology Research

Home About Us Scope Editorial Board Blog/Latest News Contact Us
0.2
2019CiteScore
 
10th percentile
Powered by  Scopus
Scopus coverage:
Nov 2018 to May 2020

CALL FOR PAPERS
AUTHORS
DOWNLOADS
CONTACT

IJSTR >> Volume 8 - Issue 7, July 2019 Edition



International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616



Optimization Of Clay-Bonded Graphite Crucible Using D-Optimal Design Under Mixture Methodology

[Full Text]

 

AUTHOR(S)

Olurotimi M. Adeoti, Olurotimi A. Dahunsi, Olayinka O. Awopetu, Kamoru O. Oladosu, Omolayo M. Ikumapayi

 

KEYWORDS

Bulk density, D-Optimal design, Graphite crucible, Optimization, Shrinkage.

 

ABSTRACT

The aim of this study is to optimize clay-bonded graphite crucible from the mixture of clay and graphite and selected additives (MgO and SiC) using D-optimal under the Mixture Methodology of the Design-Expert version 6.08. The samples were dried forced under the normal atmospheric condition for two weeks and were oven dried at 100oC and later fired in a muffle furnace at 11000C. The samples were subjected to the following mechanical test bulk density, linear firing shrinkage, and apparent porosity. The results obtained shows that experimental Run 7 gave the least value of bulk density (1.80) with Clay (80 %), Graphite (10 %) and MgO and SiC (10 %) respectively but Run 9 gave the lowest apparent porosity with Clay (70 %), graphite (10 %) [MgO and SiC (10 %)]. Further investigation conducted indicated that Run 13 with percentage composition of 80 % clay, 10 % graphite, 5 % MgO and 5 % SiC gave the highest value of the bulk density of 2.91 and the least value of linear shrinkage of 2.15 and the apparent porosity value of 28.20. These values fall within the experimental range given by literature. Though by natural intuition and from the literature survey, run 14 would have been selected but based on values obtained, run 13 was confirmed and concluded upon to have a better composition as a result of the computer analysis using design expert considering the values obtained from the selected mechanical test.

 

REFERENCES

[1]. Aigbodion, V. S., Asuke. F., Neife S. I., Edokpia R.O. and Omah A.D (2014): “Production of Alumino-Silicate Clay-Bonded Bagasse Ash Composite Crucible by Slip Casting”. Journal of Materials Environmental Science Vol.5,No.5, pp 1658-1666.
[2]. Anderson, M.J. and Whitcomb, P.J., (2014),” Finding the Optimal formulation for mixture: Discover sweet spots where multiple products specification can be met in the most desirable way. Available at www.stat-ease.com/pubs/chan.
[3]. Cihon, M.T. (2013,” Response surfaces for Compressive strength of concrete”, Construction and Building materials, Vol. 40, p763-774.
[4]. Noorhafanita, N., Sahrim H., Chin H. C. and Nay M. H. (2014): “Mechanical and Thermal Properties of Graphite Oxide Filled Epoxy Nanocomposites,” Journal of Sains Malaysian, Vol. 43, No.4, pp 603-609.
[5]. Nwobi, B. E., Ahmed A.S and Aderemi, B.O. (2002): “Beneficiation and characterization of Bauchi graphite”, Journal of Nigerian Society of Chemical Engineers. Vol.20, No.2, pp 19-22,
[6]. Oladosu, K.O.; Kareem, B; Akinnuli, B.O and Alade, A.O.(2016) “ Optimization of ash yield from the combustion of palm kernel shell and selected additives (Al2O3,CaO, and MgO)”, Leonard Electronic Journal of Practices and Technologies, Issue 28,pp 9-18.
[7]. Rehren, T. and Papakhristu, O., (2000): “Cutting Edge Technology–The Ferghana Process of Medieval crucible steel Smelting, Metalla Bochum Press, London, Vol.7, No. 2, pp 55–69.
[8]. Richards. J. (1997): “High rate evaporation from graphite crucibles”. Edinburgh University Press Ltd, Edinburgh Vol.1, No.1.pp 234
[9]. Sugwon, K., Cockcroft, S. L., Omran, A. M. and Honam, H. (2009): “Mechanical, Wear and Heat exposure properties of Compacted graphite Cast Iron at Elevated temperatures”, Journal of Alloys and Compounds, Vol. 487, No. 1, pp 253 -257
[10]. Thomas, D. G., Asuke, F., & Yaro, S. A. (2014). Determination of Some Conceptual Mineral Processing Parameters of Soba-WankaPyrochlore-Col Tan Mineral Ore Deposit. 2014 Nigeria Engineering Conference, Vol. 2, No.1; pp32-41.
[11]. Vaugh N.A.(2000), “Design expert software, stat-ease ,inc, Minneapolis, M.N, U.S.A.