Optimierung der Energienutzung bei der Aluminiumherstellung

Analysing the sustainability of the aluminium industry, energy input is an important indicator. Besides the use of energy resources, energy consumption has a negative impact on the ecology, e.g., emissions caused by energy conversion, as well as economic effects due to energy costs. In this paper, options for reducing the energy use during aluminium production are being analysed. Subsequently, different methods for rating the quality of energy are being applied. In order to calculate scenarios concerning potential energy reduction for the entire process, each stage was examined and analysed separately. Because of their relevance to the consumption of energy, the calculations focus on primary production, excluding bauxite production and all transports in general, on electricity supply for the electrolysis and on the recycling of aluminium in light weight packaging, to cite just one example of secondary production. Applying the best available technology in each stage of aluminium production, the specific primary energy demand can be reduced by some 20%. Different types of power plants using different energy carriers yield enormous differences in efficiency. Therefore, the variation of electricity supply for aluminium electrolysis can lead to even higher savings. Balancing only inputs of electricity and fossil fuels raising the recycling quota up to 85% is reasonable from the energy point of view. Considering material-bound energy contents, e.g., by organic ingredients results in an optimal quota of 70%. But even in this case, the primary energy demand of the total production is reduced by 28% compared to the current state of affairs, whereby the recycling quota lies at a mere 59%.

Grantor dc:publisher

Publikationsserver der RWTH Aachen University

Year dc:date

2002

Author dc:creator

• Quinkertz, Rainer

Contributors dc:contributor

• Kugeler, Kurt

• info:eu-repo/classification/ddc/660
• Technische Chemie

Statement dc:rights

• info:eu-repo/semantics/openAccess

Language dc:language

ger

Identifier

https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-115040%22

OAI record oai:identifier

https://publications.rwth-aachen.de/oai2d?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai%3Apublications.rwth-aachen.de%3A52846