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Nwokeocha, T. O.
Department of Mechanical Engineering, Nnamdi Azikiwe University Awka Anambra State, Nigeria
Achebe, C. H.
Department of Mechanical Engineering, Nnamdi Azikiwe University Awka Anambra State, Nigeria
Okolie, P. C.
Department of Mechanical Engineering, Nnamdi Azikiwe University Awka Anambra State, Nigeria
ABSTRACT
The effect of firing temperatures on the
refractory properties of Mgbom clay deposit was established. The clay sample was
collected from the deposit and was processed. The chemical and mineralogical
analyses were done using X-ray fluoresce and X-ray diffraction respectively.
The sample was processed, molded, dried and fired at different temperature of
9000C, 11000C and 12000C. The refractory
properties were tested based on ASTM standards. Results obtained show that
Mgbom clay has 28% alumina and 58.6% silica, 8.68% iron oxide, 1.5% potassium
oxide and other oxides in trace quantities. Mineralogical phase analysis
confirmed the presence of quartz, kaoline and rutile in the clay structure.
Hence, Mgbom clay qualifies for fire clay. At the various respective firing
temperatures of 9000C, 11000C and 12000C, the
values of the refractory properties such as linear shrinkage, water absorption,
apparent porosity, bulk density, modulus of rupture, thermal shock resistance
and refractoriness were obtained as (4.09 - 7.27%), (8.49 - 0.51%), (15.65 -
1.01%), (1.84 - 1.99g/cm3), (27.26 - 39.28N/mm2), (21 -
28cycles) and (1250 - 16500C) respectively. It was found from the
results that firing temperature showed a linear relationship with the clay
properties and that clay’s optimum properties are obtainable at the firing
temperature above 11000C. Therefore, it was recommended that firing
temperature above 11000C should be used as appropriate temperature
for firing Mgbom clay base materials.
Keywords: Temperature, refractory, clay, alumina, silica, material
https://doi.org/10.33922/j.ujet_v6i2_9
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Published
Friday, January 22, 2021
Issue
Vol. 6 No. 2, December 2020
Article Section
GENERAL
The contents of the articles are the sole opinion of the author(s) and not of UJET.
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