Preparation of High Pure α-Al2O3 from Aluminum Dross by Self-Heat Generating Method

IF 0.5 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY
U. Singh, J. Pendam, M. Tirpude, P. Yadav, A. Agnihotri
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引用次数: 0

Abstract

Due to its excellent engineering properties, aluminum has become an important material for processing industries. As the demand for aluminum increased, a large amount of waste aluminum dross was generated during the aluminum smelting process. The aluminum dross contained aluminum nitride and would cause odor while being disposed in landfill, making the aluminum dross disposal a tough issue. Therefore, the aluminum dross was mostly stored in the original plants. The objective of this study was to develop an economically feasible and environmentally friendly technology to recover aluminum dross. Aluminum dross ranges from 1–2% of the aluminum manufactured and comprises 30–70% aluminum by weight. 1 ton of aluminum metal production generates 10 to 20 kg of dross. Currently, in India, there is very limited organized processing of dross. The world produces approximately 65 million tons of aluminum per annum, which results in approximately 1 million tons of aluminum dross being produced every year. Furthermore, almost 100 000 of these are produced in India. Hence, the environmental impact of this waste is a global problem that needs to be addressed on priority. In this paper, a new method is developed to prepare a high pure α-alumina (99% purity) from aluminum dross by self-heat generating, one-step combustion method at 500°C furnace temperature.

铝渣自生热法制备高纯α-Al2O3
由于其优良的工程性能,铝已成为加工工业的重要材料。随着铝需求量的增加,铝冶炼过程中产生了大量的废铝渣。铝渣中含有氮化铝,填埋后会产生恶臭,是铝渣处理的难题。因此,铝渣大多储存在原厂。本研究的目的是开发一种经济可行、环境友好的铝渣回收技术。铝渣占制造铝的1-2%,铝重量占30-70%。生产1吨铝金属会产生10 ~ 20公斤的渣滓。目前,在印度,有组织的渣滓处理非常有限。世界每年生产约6500万吨铝,这导致每年生产约100万吨铝渣。此外,其中近10万辆在印度生产。因此,这种废物对环境的影响是一个需要优先处理的全球性问题。本文研究了以铝渣为原料,在500℃炉温下,采用自生热一步燃烧法制备高纯α-氧化铝(纯度99%)的新方法。
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来源期刊
CiteScore
1.00
自引率
33.30%
发文量
27
期刊介绍: International Journal of Self-Propagating High-Temperature Synthesis  is an international journal covering a wide range of topics concerned with self-propagating high-temperature synthesis (SHS), the process for the production of advanced materials based on solid-state combustion utilizing internally generated chemical energy. Subjects range from the fundamentals of SHS processes, chemistry and technology of SHS products and advanced materials to problems concerned with related fields, such as the kinetics and thermodynamics of high-temperature chemical reactions, combustion theory, macroscopic kinetics of nonisothermic processes, etc. The journal is intended to provide a wide-ranging exchange of research results and a better understanding of developmental and innovative trends in SHS science and applications.
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