Title of article :
Production of Al-rich sludge-containing ceramic bodies by different shaping techniques
Author/Authors :
M.J. Ribeiro، نويسنده , , D.U. Tulyaganov، نويسنده , , J.M.F. Ferreira، نويسنده , , J.A. Labrincha، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2004
Pages :
8
From page :
139
To page :
146
Abstract :
The present work deals with the processing of refractory ceramic products by using different shaping technologies, namely, unidirectional dry pressing, extrusion, and slip casting. The formulations used include an Al-rich sludge collected in the wastewater treatment unit of an industrial plant dealing with anodizing or surface-coating processes, diatomite and kaolin or ball clay. The effects of a pre-treatment given to the Al-rich sludge and of composition and amount of added dispersant on rheological behavior of suspensions were studied. The green bodies were sintered at different temperatures in the range 1400–1650 °C, and the ultimate material properties (firing shrinkage, water absorption, bending strength, SEM microstructure) were evaluated. The results obtained demonstrated that: (i) the flow behavior of the suspensions is strongly affected by the history of the Al-rich sludge and the composition, as well as by the added amount of deflocculant, (ii) the shaping process has a great influence on the final microstructures and material properties, which derive from different degrees of homogeneity and particle packing achieved in the green state. Soluble salts present in the Al-rich sludge create difficulties in achieving proper dispersion and make slip casting products less reliable compared with those consolidated by other shaping techniques
Keywords :
Recycling , Mullite–alumina refractories , Shaping techniques , Al-rich sludge
Journal title :
Journal of Materials Processing Technology
Serial Year :
2004
Journal title :
Journal of Materials Processing Technology
Record number :
1178350
Link To Document :
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