Production of Mullite from Bentonite Clays and Alumina Residue

Valmir José da Silva; Gelmires de Araújo Neves; Wherllyson Patrício Gonçalves; Josileido Gomes; Romualdo Rodrigues Menezes; Hélio de Lucena Lira; Lisiane Navarro de Lima Santana

doi:10.4028/www.scientific.net/MSF.820.84

Paper Titles

Characterization, Modification and Rheology of Green Clay
p.60

Bentonite Clays Characterization in the Town of Sossego – Paraiba State
p.65

Effect of Solvothermal Treatment on Physical Properties of Nickel and Aluminum Based Oxide Powders Synthesized by Coprecipitation
p.73

Ceramic Membrane Made of Alumina Synthesized by Pechini Method for Application in Microfiltration Processes
p.79

Production of Mullite from Bentonite Clays and Alumina Residue
p.84

Influence of Power and Synthesis Time in the Formation of Mullite Obtained by Microwave Heating
p.90

Synthesis of the MgAl₂O₄ Spinel Obtained via Combustion Reaction Using Glycerine from the Biodiesel as a Fuel for Producing Cellular Ceramics
p.96

Synthesis and Sulfating of the ZrO₂ for Obtaining of a Catalyst in Order to Future Use in Esterification for Biodiesel Production
p.102

Synthesis of Mullite by the Pechini Method
p.107

HomeMaterials Science ForumMaterials Science Forum Vol. 820Production of Mullite from Bentonite Clays and...

Production of Mullite from Bentonite Clays and Alumina Residue

Abstract:

Among the ceramic raw materials, mullite is highlighted for presenting features which are of great interest for industry. However, the process through which this material is obtained requires pure reagents, raising the production costs. Therefore, this work is intended to obtain mullite from bentonite clays (source of silicon and aluminum oxides) and alumina residue, resulting from the Bayer process, thus becoming an interesting process from the economic and environmental standpoint. For this purpose, we made use of the thermal treatment in conventional furnace, temperature of 1500°C, heating rate of 5°C/min and dwell time of 60 min at maximum temperature. The synthesized samples were characterized by X-ray fluorescence (EDX), X-ray diffraction (XRD) and scanning electron microscopy (SEM) coupled to an EDS, besides the quantification of the phases present in the samples. The results revealed that mullite was the major phase produced, but corundum appeared as secondary phase.

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Materials Science Forum (Volume 820)

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84-89

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https://doi.org/10.4028/www.scientific.net/MSF.820.84

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June 2015

Authors:

Valmir José da Silva*, Gelmires de Araújo Neves, Wherllyson Patrício Gonçalves, Josileido Gomes, Romualdo Rodrigues Menezes, Hélio de Lucena Lira, Lisiane Navarro de Lima Santana

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Alumina Residue, Bentonite Clays, Mullite

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