Recycled Alumina Production from the Anodizing Industry to Tubulation Coating of Petroleum Craking

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.