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Ribeiro, Eliana Cláudia de Otero

doi:10.1590/s0100-55022007000200001

Cited by 1 publication

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“…It represents reasonably well the type of waste generated by this sector. The sludge was used after drying (110ºC / 24 hours) and after calcination (1400ºC /1 hour) and its full characterisation is detailed elsewhere [4,5].…”

Section: Methodsmentioning

confidence: 99%

“…The sludge is mostly constituted of colloidal aluminium hydroxide and some sodium or calcium (generated from neutralising solutions), aluminium sulphate (used as flocculating agent) and water (up to 85 wt-%) which is classified as non-hazardous [1][2][3]. Some studies suggest that recycling of Al-rich anodising sludge as a component of different types of refractory materials might represent a good environmental solution [4][5][6][7]. Alumina-based ceramics exhibit important properties, such as high thermal resistance and high electrical resistivity (>10 14 Ω.cm) [8,9].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ceramic Properties of Alumina and Alumina-Mullite Pressed Bodies Based on Al-Rich Anodising Sludge

Ribeiro¹,

Labrincha

2008

MSF

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Alumina and alumina-mullite based refractory ceramic materials were produced from formulations based on an industrial Al-rich sludge derived from the wastewater treatment of the aluminium anodising process. Other ceramic raw materials like diatomite was also added, which can be consider as a by-product. Cylindrical samples processed by uniaxial dry pressing were sintered at different temperatures (between 1400-1650°C, 1 hour soaking) to study the ceramic properties evolution. The performance of fired materials was evaluated (firing shrinkage, water absorption, bending strength, thermal expansion coefficient, refractoriness and SEM microstructure) and demonstrated that optimal properties were obtained at 1650°C for alumina and 1450°C for alumina-mullite.

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Section: Methodsmentioning

confidence: 99%