Binders for Carbon Electrodes in the Aluminum Industry

1955 ◽  
Vol 47 (7) ◽  
pp. 1412-1415 ◽  
Author(s):  
L. P. Charette ◽  
G. T. Bischofberger
Keyword(s):  
Aluminum Industry ◽  
Carbon Electrodes ◽  
The Aluminum Industry

On the effect of the periodicity of diagnostic measurements on improving the reliability of high-voltage transformers

2019 ◽  
Vol 12 (1) ◽  
pp. 18-21
Author(s):  
V. A. Tikhonov
Keyword(s):  
Service Life ◽  
High Voltage ◽  
Chromatographic Analysis ◽  
Aluminum Industry ◽  
Early Stage ◽  
Diagnostic Methods ◽  
Transformer Oil ◽  
Operating Voltage ◽  
Dissolved Gases ◽  
The Aluminum Industry

The influence of the periodicity of diagnostic measurements on the operational state of high-voltage transformers is considered. Examples of defects of switching devices of converter transformers and methods for their detection are given. The rationale for the importance of recognition of defects at an early stage of their occurrence is given. The influence of the multiplicity of overvoltages on the service life of converter transformers in the aluminum industry is investigated. Based on the analysis of the service life of converter transformers of one of the powerful aluminum plants, where 83% of converter transformers have exhausted their standard service life, it is shown that in 40% of cases it would be possible to avoid their failures, with timely detection and elimination of emerging defects. Examples of defects of OLR (on-load regulators) of converter transformers and methods for their detection are given. The importance of recognition of defects at an early stage of their occurrence is substantiated. A method for chromatographic analysis of dissolved gases in transformer oil has been developed for the qualitative determination of defects and ways to eliminate them. Examples of diagnostics of converter transformers at operating voltage and working load are given, providing the best quality operational characteristics of converter transformers. The periodicity of diagnostic measurements and the reduction of defects and failures has been substantiated. The question of diagnosing the state of the converter transformer TDNP-40000/10 at an enterprise of the aluminum industry is investigated. Currently, diagnostic methods are being developed based on chromatographic analysis of dissolved gases in transformer oil. The presented method of evaluating the operating parameters of transformers allows for the safe operation of high-voltage transformers and enables to increase the reliability of the power supply scheme of aluminum industry plants.

scholarly journals Compaction of Cohesive Granular Material: Application to Carbon Paste

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 704
Author(s):  
Zahraa Kansoun ◽  
Hicham Chaouki ◽  
Donald Picard ◽  
Julien Lauzon-Gauthier ◽  
Houshang Alamdari ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Mechanical Behavior ◽  
Aluminum Industry ◽  
Frequency Effect ◽  
Strain Rates ◽  
Cyclic Tests ◽  
Carbon Paste ◽  
Rheological Models ◽  
Softening Behavior ◽  
The Aluminum Industry

Carbon-like materials such as the anode and the ramming paste play a crucial role in the efficiency of the Hall–Héroult process. The mechanical behavior of these materials during forming processes is complex and still ill-understood. This work aimed to investigate experimentally the mechanical behavior of a carbon paste used in the aluminum industry under different loading conditions. For this purpose, experiments consisting of (1) relaxation tests at different compaction levels, (2) quasi-static cyclic tests at several amplitudes, (3) monotonic compaction tests at varied strain rates, and (4) vibrocompaction tests at different frequencies were carried out. The obtained results highlight some fundamental aspects of the carbon paste behavior such as the strain rate’s effect on the paste compressibility, the hardening-softening behavior under cyclic loadings, the effect of cycling amplitude on the stress state and the paste densification, and the frequency effect on the vibrocompaction process. These results pave the way for the development of reliable rheological models for the modeling and the numerical simulation of carbon pastes forming processes.

On Treating Multiobjective Cutting Stock Problem in the Aluminum Industry under Fuzzy Environment

2007 ◽  
Vol 2 (5) ◽  
pp. 374-385 ◽  
Author(s):  
Omar M. Saad . ◽  
Mervat K. El-Shafei . ◽  
Lamia E. Ezzat .
Keyword(s):  
Aluminum Industry ◽  
Cutting Stock Problem ◽  
Cutting Stock ◽  
Fuzzy Environment ◽  
The Aluminum Industry

Management Accounting

2020 ◽  
pp. 1-26
Author(s):  
Gary Cokins ◽  
Sorinel Căpușneanu
Keyword(s):  
Balanced Scorecard ◽  
Aluminum Industry ◽  
Practical Experience ◽  
Business Environment ◽  
Strategic Objectives ◽  
Economic Entity ◽  
Future Challenges ◽  
Original Case ◽  
The Aluminum Industry ◽  
Sustainability Balanced Scorecard

This chapter illustrates some aspects of sustainability balanced scorecard and its implementation within an economic entity in the aluminum industry. The main objectives of this chapter are to present balanced scorecard and integrate the fifth pillar into sustainability balanced scorecard, including some of its considerations and challenges. The authors identify the causes of SBSC appearance and its conceptual-evolving treatments, some considerations stemming from the practical experience of specialists, but also some current and future challenges. The focus is on the implementation of the SBSC within an economic entity in the aluminum industry by presenting an original case study. It highlights the steps taken in designing and presenting the SBSC, including the architecture of the strategic sustainability map used to translate the strategic objectives of the entity and the performance indicators. Through the authors' contribution, a new conceptual-empirical framework is created to consider debate and aspects of sustainability encountered in the business environment around the world.

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