ELABORATION OF REFRACTORY BRICKS
WITH A RAW CLAY MATERIAL FROM BURKINA FASO
M. Seynou1*, P. Flament2, Y. Traoré Dah1, J. Tirlocq2, R. Ouedraogo1
1 Laboratoire de Physico-Chimie et de Technologie des Matériaux (LPCTM), UFR/ Sciences Exactes et Appliquées,
Université de Ouagadougou, 03 B.P. 7021 Ouagadougou 03, Burkina Faso
2 Centre de Recherches de l’Industrie Belge de la Céramique, Avenue Gouverneur, Cornez, 4, B-7000 Mons, Belgium
* Corresponding author. E-mail: email@example.com /firstname.lastname@example.org
Received: 07 April 2013; revised version accepted: 04 November 2013
A raw clay material deposit in Burkina Faso has been characterized for potential refractory bricks elaboration. It consists of a mix of kaolinite (50%.wt), illite (13%.wt) and quartz (33%.wt). Refractory sample pieces have been elaborated using this clay material. The clay has been extruded and fired in order to produce chamotte grog which has been crushed and blended with raw clay. This admixture has then been pressed, dried and fired to get cylindrical specimen. After a 1250°C firing schedule, the refractory bricks samples have significant mullite content but they are porous (open porosity 38.5%) and show a high shrinkage (5%) and feeble strength (15 MPa). However, the refractoriness properties evaluated by Seger Cone test show a refractoriness higher than 1580°C.
Keywords: Burkina Faso; Refractory clay; Extrusion; Pressing; Seger Cone; Mullite.