Cell Voltage Noise in Aluminium Smelting

Agnihotri, Anupam; Pathak, S. U.; Mukhopadhyay, J.

doi:10.1007/s12666-013-0348-5

Cited by 7 publications

(9 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Three different types of voltage noise occur in the electrolysis cell. Bubble noise or fluctuating noise occurs due to the production of CO2 bubbles on the anodes as a necessary and inevitable part of the electrolysis process [45][46][47][48]. Short-circuiting noise or pulsating noise occurs due to a temporary shortening caused by molten metal splashing against the bottoms of the anodes [45][46][47][48].…”

Section: Cell Voltage Noise Reductionmentioning

confidence: 99%

“…Bubble noise or fluctuating noise occurs due to the production of CO2 bubbles on the anodes as a necessary and inevitable part of the electrolysis process [45][46][47][48]. Short-circuiting noise or pulsating noise occurs due to a temporary shortening caused by molten metal splashing against the bottoms of the anodes [45][46][47][48]. Metal pad motion or wavy noise occurs due to vigorous metal movement in the cathode cavity, resulting in changes of the actual ACD [45][46][47][48].…”

Section: Cell Voltage Noise Reductionmentioning

confidence: 99%

See 1 more Smart Citation

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

View full text Add to dashboard Cite

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.

show abstract

Section: Cell Voltage Noise Reductionmentioning

confidence: 99%

Section: Cell Voltage Noise Reductionmentioning

confidence: 99%

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

View full text Add to dashboard Cite

show abstract

“…At present, CV is still one of the main parameters used for the diagnosis of cell conditions, and lots of diagnostic methods have been introduced based on CV [11][12][13][14]. In addition, the conception of using individual anode current signal for cell control is now widely accepted with the advancement of current detection technology.…”

Section: Introductionmentioning

confidence: 99%

Simulation Method Based on Equivalent Circuit to Investigate the Circuit Characteristics in Aluminum Reduction Cell

Wang

Tie

Sun

et al. 2014

Trans Indian Inst Met

View full text Add to dashboard Cite

In this paper, on the basis of simulation on the electric field of aluminum reduction cell, the simulation signals of cell voltage (CV) and anode currents were obtained through simulating the cell equivalent circuit which was established using Matlab/Simulink software. Several cell conditions, including potline current fluctuation, anode changing, low anode-cathode distance, metal pad contacting with anode surface and local anode effect, were simulated using this model. These obtained simulation data were analyzed comprehensively by time domain, frequency domain, and other statistical methods, such as skewness, and kurtosis. This study further demonstrates that the individual anode current can provide more information on local cell conditions. Different cell conditions produce different characteristics of CV and anode current in time domain or frequency domain, skewness and kurtosis are more sensitive to the change of signals.

show abstract

“…Therefore, reducing the technical fault in the cell can improve the current efficiency and reduce energy consumption. [1] The monitoring of cell parameters (anode current, cell voltage, temperature, mole ratio, the concentration of alumina, etc.) can effectively reduce the probability of failure in the cell.…”

mentioning

confidence: 99%

“…can effectively reduce the probability of failure in the cell. [1][2][3] Differing from the cell voltage, anode current has great significance for the early warnings of anode effects and diagnosis of localized cell conditions. [4][5][6] Although the anode current is a very important parameter in the aluminum electrolysis process, due to the difficulty of measurement and management, it is only as an auxiliary means for cell control in most of the aluminum smelters in China.…”

mentioning

confidence: 99%

Testing and Characterization of Anode Current in Aluminum Reduction Cells

Wang

Tie

Sun

et al. 2016

Metall Mater Trans B

View full text Add to dashboard Cite

Anode current is an important parameter in the aluminum reduction process, but to test the anode current accurately is difficult at present. This study tested the individual anode current using the fiber-optic current sensor. The testing results show that this method can effectively avoid the interference of the electromagnetic field, and the current is measured with high precision which error is less than 1 pct. In the paper, the test currents under different cell conditions, including anode changing, metal tapping, abnormal current, and anode effect, are investigated using the method of time-domain and frequency-domain analysis, and the simulation method is also combined to investigate the cell conditions. The results prove that different cell conditions will show different anode current characteristics, and the individual current can monitor the cell conditions, especially the localized cell conditions. Some abnormal cell conditions can be found through anode current rather than cell voltage. The anode current can also be used for early detection of anode effect.

show abstract

Cell Voltage Noise in Aluminium Smelting

Cited by 7 publications

References 0 publications

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

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

Simulation Method Based on Equivalent Circuit to Investigate the Circuit Characteristics in Aluminum Reduction Cell

Testing and Characterization of Anode Current in Aluminum Reduction Cells

Contact Info

Product

Resources

About