The suitability of Oreke dolomite in Kwara State, Nigeria as a raw material for the manufacturing of refractories was investigated. The Oreke dolomite samples were mingled with feldspar, clay, and quartz to form a blend. The fifteen (15) Blend samples were moulded and analyzed for their chemical, physical and mechanical properties. The characterization was carried out in accordance with American Society of Testing and Material (ASTM). The blend samples were tested for various refractory properties such as bulk density, porosity, cold crushing strength, linear shrinkage, refractoriness and others like water absorption and compressive strength. The chemical composition of the Blend was determined, using X-Ray Fluorescence Spectrometer and the result shows that Silica is 60%, Alumina is 11.5%, Iron Oxide is 0.48%, Calcium Oxide is 10%, Magnesium is 6.4%, Alkali is 10.4%, and Loss of Ignition of the sample is 15.28%. The addition of 10%-12% quart contents with dolomite of 20%-25% contents complements the percentage of silica in the blend thereby improving the properties of the blend. The strength characterization shows that the Compressive Strength (mean value) of the blend samples is 5.65 N/m2 with respect firing temperature. The strength classification varies between medium to high and was found to satisfy the allowable standard values for the production of refractory wares.
Cite this paper
J. Akande and S. Agbalajobi, "Analysis on Some Physical and Chemical Properties of Oreke Dolomite Deposit," Journal of Minerals and Materials Characterization and Engineering
, Vol. 1 No. 2, 2013, pp. 33-38. doi: 10.4236/jmmce.2013.12007
 W. A. Deer, R. A. Howie and J. Zussman, “An Introduction to the Rock-Forming Minerals,” 2nd Edition, Prentice Hall Longman, Upper Saddle River, 1996, pp. 489-493.
 J. G. Adetoro, “History and Ownership Structure of Nigerian Marble Mining Company (NMMC) Ltd., Igbeti,” Oyo State, 1986, pp. 1-8.
 D. G. A. Whitten and J. R. V. Brooks, “The Penguin Dictionary of Geology,” Penguin Press, New York, 1972, p. 131.
 H. H. Read, “Rutley Element of Mineralogy,” 26th Edition, T. Murby and Co., Publishers, London, 1979, p. 279.
 J. E. Kogec, N. C. Trivedi, J. M. Barker and S. T. Krukowski, “Industrial Mineral and Rocks: Commodities Markets and Uses,” Society for Mining, Metallurgy and Exploration (SME), 2006, pp. 587
 C. A. Sorrel and G. F. Sandstrom, “The Rocks and Mineral of the World,” William Collins Sons and Co., Ltd., London, 1977, pp. 230.
 R. M. Goktan, “Discussion on ISRM Suggested Method for Determining the Shore Hardness Value for Rock,” International Journal of Rock Mechanics and Mining Science, Vol. 43, No. 6, 2006, pp. 996-997.
 S. Alsop, “Key Properties of Ceramic Raw Materials,” Journal of the Australasian Ceramics Society, Vol. 34, 1998, pp. 122-127.
 ASTM, “Standard Test Method for Drying and Fired Shrinkages of Ceramic Whiteware Clay,” 2010.
 ASTM, “Standard Test Methods for Size, Dimensional Measurements, and Bulk Density of Refractory Brick and Insulating Firebrick,” 2010.
 ASTM, “Standard Test Method for Apparent Porosity, Water Absorption, Apparent Specific Gravity, and Bulk Density of Burned Refractory Brick and shapes by Boiling Water,” 2010, pp. 6-8.
 I. I. Ekwere, “Characterization of Some Nigeria Clays for Ceramic Application,” Proceedings of 1st National Conference of Faculty of Technology, Obafemi Awolowo University, Ile-Ife, 17-19 November 2009, pp. 32-37.
 ASTM, “Standard Test Methods for Cold Crushing Strength and Modulus of Rapture of Refractories,” 2008.
 ISRM, “Experimental Calibration of Stress Intensity Factors of the International Society of Rock Mechanics Commission (ISRM) Standard,” 1989, pp. 13-23.
 R. W. Grimshaw, “The Chemistry and Physics of Clays,” 4th Edition, Ernest Benn Publishers, London, 1971.