No abstract

The anodizing of aluminum is a common technique used to produce decorative and protective high quality film. This process results in significant volume of industrial sludge containing considerable amounts of colloidal aluminum hydroxide, which is a problem in the disposal of these industrial wastes due to the environmental impact. This paper aims at the treatment of theses residues, which were heat-treated at the temperatures of 200°C, 1000°C and 1400°C. After each treatment, the residues were put to the X-Ray Difraction and the X-ray Fluorescence analysis. In evaluating these results, it was found a gradual increase of the percentage of alumina at 1400°C to achieve 93%. With the acquisition of ceramic mass with a high content of alumina, the objective being to make a refractory to coat the petroleum refining pipes, thereby solving an environmental problem from the aluminum industry, presenting an alternative to the petroleum industry. These residues were compacted and immersed in land and sea petroleum for 30 days, after this period its mechanical properties were analyzed to study its response to the contact with the petroleum, where it was found that these remained kept.

The aluminum anodizing is a used technique used to produce decorative and protective film of high quality. This anodizing process results in a large volume of industrial sludge, containing amounts of aluminum hydroxide colloidal problematic for these industrial waste disposal due to the environmental impact. This study aims to accomplish the treatment of these residues, which were thermally sintered at temperatures of 200 °C, 1000 °C and 1400 °C. After the heat treatment, the residues were subjected to analysis of X-ray diffraction and X-ray fluorescence. In evaluating these results, there was a gradual increase of the percentage of alumina at 1400 °C to achieve 95%. With the acquisition of the ceramic high alumina content, the objective is the fabrication of refractory linings for pipes used in the oil refining process. And this study will serve to solve an environmental problem arising from the metallurgical industry and simultaneously presenting an alternative material for the industry.