Research on Statistical Process Control for Aluminium Electrolysis Reduction

Cao, Dan; Song, Xi Zhong; Li, Jin Hong

doi:10.4028/www.scientific.net/amm.241-244.1839

Cited by 1 publication

(2 citation statements)

References 4 publications

(6 reference statements)

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“… Automatic feeding of alumina at multiple points [3]  Automatic anode effect suppression [3,37,38]  The use of a computer-aided monitor and control system [3,39], such as: o Active cell databases [3]. o The Statistical Process Control (SPC) method [39]. o The combination of fuzzy theory, rough set and a genetic algorithm for fault diagnosis [40].…”

Section: Process Performance Improvementsmentioning

confidence: 99%

“…In addition to the reduced energy usage, there are several environmental and operational benefits associated with improving the process performance [3,37,39], including a reduction in GHG emissions [3,37,43]. Improvement of the cell control point-feeding systems of existing PFPB cells can reduce the electricity use by 0.2 kWh/kg Al for an investment cost of 100-150 Euro/ton Al [6].…”

Section: Process Performance Improvementsmentioning

confidence: 99%

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Review of measures for improved energy efficiency in production-related processes in the aluminium industry – From electrolysis to recycling

Haraldsson

Johansson

2018

Renewable and Sustainable Energy Reviews

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The aluminium industry is facing a challenge in meeting the goal of halved greenhouse gas emissions by 2050, while the demand for aluminium is estimated to increase 2-3 times by the same year. Energy efficiency will play an important part in achieving the goal. The paper's aim was to investigate possible production-related energy efficiency measures in the aluminium industry. Mining of bauxite and production of alumina from bauxite are not included in the study. In total, 52 measures were identified through a literature review. Electrolysis in primary aluminium production, recycling and general measures constituted the majority of the 52 measures. This can be explained by the high energy intensity of electrolysis, the relatively wide applicability of the general measures and the fact that all aluminium passes through either electrolysis or recycling. Electrolysis shows a higher number of emerging/novel measures compared to the other processes, which can also be explained by its high energy intensity. Processing aluminium with extrusion, rolling, casting (shape-casting and casting of ingots, slabs and billets), heat treatment and anodising will also benefit from energy efficiency. However, these processes showed relatively fewer measures, which might be explained by the fact that to some extent, these processes are not as energy demanding compared, for example, to electrolysis. In many cases, the presented measures can be combined, which implies that the best practice should be to combine the measures. There may also be a future prospect of achieving carbon-neutral and coal-independent electrolysis. Secondary aluminium production will be increasingly important for meeting the increasing demand for aluminium with respect to environmental and economic concerns and strengthened competitiveness. Focusing on increased production capacity, recovery yields and energy efficiency in secondary production will be pivotal. Further research and development will be required for those measures designated as novel or emerging.

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