Study of the Potentiality of Using Three Raw Materials from Burkina Faso in Porcelain Formulations | Chapter 11 | Recent Trends in Chemical and Material Sciences Vol.7

 Porcelain is a ceramic material made out of a triaxial composition of clay and kaolin, quartz, and feldspar. The usage of three Burkina Faso mineral resources in the formulation of porcelains has been investigated. The clay « NONG » contains 62 percent kaolinite, 18 percent illite, 17 percent quartz, and 17 percent rutile, according to the characterisation data (1 percent ). Albite (17%), muscovite (44%), and quartz are found in the pegmatite « PEG ». (34 percent ). Quartz makes up the majority of the sand « SAB ». Traditional hard porcelain requires 50 percent kaolin, 25 percent silica, and 25 percent feldspar in its formulation. Some samples were sintered at temperatures ranging from 1200°C to 1300°C after being cast into porous moulds. Clay « NONG » contributes to mullite recrystallization and the production of a vitreous phase during burning. At temperatures above 1050 °C, « PEG » contributes to the quantity and behaviour of the liquid phase. It aids in the management of the sintering process by allowing for a nearly zero (0.5%) open porosity. Because of its high melting point, « SAB » increases thermal and dimensional stability and is involved in recrystallization processes and liquid phase behaviour. The XRD analysis of all specimens revealed that it was made up of amorphous, mullite, and quartz phases. The specimens sintered at 1250 °C yielded the following intriguing results: a density of 2.3 to 2.5; a water absorption of less than 0.5 percent; an open porosity of less than 1%; and a flexural strength of greater than 35 MPa As a result, materials burned at temperatures higher than this are closely related to the porcelain group.

Author(s) Details:

Youssouf Sawadogo,
Laboratoire de Chimie Moléculaire et des Matériaux (LCMM), University Joseph KI-ZERBO, Burkina Faso.


Lamine Zerbo,
Laboratoire de Chimie Moléculaire et des Matériaux (LCMM), University Joseph KI-ZERBO, Burkina Faso.


Moustapha Sawadogo,
Laboratoire de Chimie Moléculaire et des Matériaux (LCMM), University Joseph KI-ZERBO, Burkina Faso.



Mohamed Seynou,
Laboratoire de Chimie Moléculaire et des Matériaux (LCMM), University Joseph KI-ZERBO, Burkina Faso.

Moussa Gomina,
CRISMAT, UMR 6508, Ensicaen, Equipe Structure et Comportement Thermomécanique des Matériaux, Caen Cedex, France.

Philippe Blanchart,
IRCER, UMR-CNRS 7315, Centre Européen de la Céramique, 12, rue Atlantis, 87068 Limoges, Cedex, France.

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Study of the Mineral Composition and Its Connection with Some Properties Important for the Sludge Flocculation Process-Examples from Omarska Mine: A Comparative Approach | Chapter 6 | Current Approaches in Science and Technology Research Vol. 9

 The primary goal of this research is to characterise the mineralogical properties of two sludge samples collected from hydro-cyclone overflow created during the processing of iron ore at the Omarska mine. A comparison of mineral composition and its relationship with key features relevant to the sludge flocculation process was also carried out. Major goethite and quartz are found in the studied sludge samples, with less clay minerals and little magnetite, hematite, clinochlore, and todorokite. They have qualitatively comparable but semi-quantitatively distinct compositions. The particle size distributions in the samples are similar, with the maximum amounts of roughly 50% belonging to the finest classes of 6 m. Almost equal iron contents are present within size classes within the samples, indicating similar mineral compositions, making this system exceedingly difficult for additional separation techniques. Due to its increased density and mineral makeup, Sludge II has a faster natural settling rate. With the addition of the flocculant, settling rates in both samples increase dramatically as the liquid component increases. The effect of the flocculant on the settling rate varies depending on the mineral makeup of the samples. The ratio of the mass of floating and sinking pieces is not affected by the time of settling, and the iron content does not alter over time. Because flocculation raises the level of iron to some extent, it should be considered an appropriate approach. Sludge has a zeta potential that is generally between that of goethite and quartz, indicating particle mixing and complicated connection.

Author (S) Details

Ljiljana Tankosic
Faculty of Mining Prijedor, University of Banja Luka, Save Kovacevica bb, 79101 Prijedor, Bosnia and Herzegovina.

Pavle Tancic
Geological Survey of Serbia, Rovinjska 12, 11000 Belgrade, Serbia.

Svjetlana Sredic
Faculty of Mining Prijedor, University of Banja Luka, Save Kovacevica bb, 79101 Prijedor, Bosnia and Herzegovina.

Zoran Nedic
Faculty of Physical Chemistry, University of Belgrade, Studentski Trg 16, 11000 Belgrade, Serbia.

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