Production and characterization of ceramic foams obtained from Al-anodizing sludge

Química Nova

Oliveira, Therezinha Maria Novais de¹  Rodrigues Neto, João Batista¹  Universidade da Região de Joinville, Joinville, Brasil¹  Universidade Federal de Santa Catarina, Florianópolis, Brasil¹  Oliveira, Bianca Goulart de¹  Oliveira, Antonio Pedro Novaes de¹  Moraes, Graziela Guzi de¹  Hotza, Dachamir¹ 

关键词: wastes;    alumina;    ceramic foams.;   

DOI  :  10.1590/S0100-40422012000100026

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

Ceramic foams were produced from a sludge generated in the aluminum anodizing process by using an industrial polyurethane foam (replication method) with open cell sizes of 10 ± 5 ppi (porosity = 97%) which were impregnated with suspensions containing 50-61 wt.% alumina, 1 wt.% citric acid, 6 wt.% bentonite and fired at 1600 ºC for 2 h. The aluminum anodizing sludge shows a high alumina content (87.5 wt.%) and a low particle size (~1.7 mm) after calcination and milling. The obtained filters show porosity of approximately 70%, filtration capability (mass water flow) of 1.7 kg/s and mechanical strength under compression of 2.40 MPa.

【 授权许可】

Unknown