International Journal of Scientific & Technology Research

Home About Us Scope Editorial Board Contact Us

IJSTR >> Volume 2- Issue 10, October 2013 Edition

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

Website: http://www.ijstr.org

ISSN 2277-8616

Physical And Chemical Analysis Of Some Nigerian Gypsum Minerals For Application In Manufacturing, Construction And Allied Industries.

[Full Text]



P. S. A. Irabor, S. 0 Jimoh, 0. J. Omowumi, B. S. 0. Ighalo



Keywords: Calcination, Dehydration, Rehydration, Setting, Accelerator, Plaster of Paris (P.O.P) and Refining.



ABSTRACT: The present work investigates the physical and chemical characteristics of some local gypsum minerals and to develop an appropriate process technology for their exploitation, refining and utilization in Nigeria. Though a number of gypsum deposits have been found in Nigeria, three varieties were studied in this work. The gypsum samples from lgbokotor and lbeshe villages in ogun state were observed via a manual pitting method while the third variety was procured from Potiskum in Borno state. The raw gypsum were beneficiated to remove obvious physical impurities and air-dried. In this experiment, the raw gypsum were analysed to determine their chemical constituents using the conventional wet silicate technique. The six major significant constituents, Carbon Dioxide (CO2); Calcium Oxide (CaO); Magnesium Oxide (MgO); Sulphur Trioxide (SO3); Ferrous Oxide (Fe203) and combined matter (Loss-on-ignition) were determined. Using an electrical Kiln with digital control, a calcinations sequence of 160c - 30'c (temperature) range against 60minutes - 300minutes (time) was used during the heat treatment procedure. The results of the experiment showed that the optimum water - plaster ratio was 3:2 while the setting or hardening time was between 3.0- 8.0 minutes. Other physical properties such as the density, colour, particle size were found to be in agreement with literature. Consequent upon the investigation reported here, an adaptive refining process technology for Nigerian Gypsum mineral has been developed and the process development and description are presented.



[1]. Lotze, F. (1957), Steinsalz and Kalisalze, Geologie Die wichtigsten Lagerstateen der Nichterze: 2nd ed; 1st Part; Velag Gebr, Borntrager, Berlin.

[2]. Le Voisier,( 1765), Euvres Completes, 17,(3), P.122

[3]. Le Chatelier, M. H. and C. R. Hebd. (1893); Seances Acad. Sci: 96.

[4]. Groves, A. W (1958) Gypsum and Antrydite, Overseas Geological Surveys, HMSO, London.

[5]. Schwriete, H.E and Knauf, A.N. (1969); Gips - Alte and neue.

[6]. Gruver, R. M. (1951); Journal, America Ceramic Soc. 34, P.353 - 357

[7]. Stack, A. V. (1968); Phosphoric acid. Marcel Dekker, Part 1- 11 New York.

[8]. Wirschine, F; Hamm, H; and Huller, (1981); Kroftwerk umwelt VGE Konf. P.6 - 101.

[9]. Baykoff, M and C. R. Hebd (1926) Seances Acad Sci; 182, P.128- 129.