scholarly journals A method for the control of alumina concentration in aluminum reduction cells

1992 ◽  
Vol 13 (1) ◽  
pp. 41-49 ◽  
Author(s):  
Jens G. Balchen
Keyword(s):  
Alumina Concentration ◽  
Aluminum Reduction

scholarly journals An ELM Based Online Soft Sensing Approach for Alumina Concentration Detection

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Sen Zhang ◽  
Xi Chen ◽  
Yixin Yin
Keyword(s):  
Extreme Learning Machine ◽  
Random Search ◽  
Aluminum Reduction Cell ◽  
Online Measurement ◽  
Alumina Concentration ◽  
Soft Sensing ◽  
Aluminum Reduction ◽  
Reduction Cell ◽  
Learning Machine ◽  
The Stability

The concentration of alumina in the electrolyte is of great significance during the production of aluminum; it may affect the stability of aluminum reduction cell and the current efficiency. However, the concentration of alumina is hard to be detected online because of the special circumstance in the aluminum reduction cell. At present, there is lack of fast and accurate soft sensing methods for alumina concentration and existing methods can not meet the needs for online measurement. In this paper, a novel soft sensing method based on a modified extreme learning machine (MELM) for online measurement of the alumina concentration is proposed. The modified ELM algorithm is based on the enhanced random search which is called incremental extreme learning machine in some references. It randomly chooses the input weights and analytically determines the output weights without manual intervention. The simulation results show that the approach can give more accurate estimations of alumina concentration with faster learning speed compared with other methods such as BP and SVM.

Estimation of spatial alumina concentration in an aluminum reduction cell using a multilevel state observer

AIChE Journal ◽  
2017 ◽  
Vol 63 (7) ◽  
pp. 2806-2818 ◽  
Author(s):  
Yuchen Yao ◽  
Cheuk-Yi Cheung ◽  
Jie Bao ◽  
Maria Skyllas-Kazacos ◽  
Barry J. Welch ◽  
...  
Keyword(s):  
State Observer ◽  
Aluminum Reduction Cell ◽  
Alumina Concentration ◽  
Aluminum Reduction ◽  
Reduction Cell

Advanced Model-Based Estimation and Control of Alumina Concentration in an Aluminum Reduction Cell

JOM ◽  
2022 ◽  
Author(s):  
Jing Shi ◽  
Yuchen Yao ◽  
Jie Bao ◽  
Maria Skyllas-Kazacos ◽  
Barry J. Welch ◽  
...  
Keyword(s):  
Aluminum Reduction Cell ◽  
Alumina Concentration ◽  
Aluminum Reduction ◽  
Reduction Cell ◽  
Model Based ◽  
Estimation And Control ◽  
And Control ◽  
Advanced Model

scholarly journals CFD Investigation of Bath Flow and Its Related Alumina Transmission in Aluminum Reduction Cells: Slotted Anodes and Busbar Designs

Metals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 805
Author(s):  
Jiaming Zhu ◽  
Jie Li ◽  
Hongliang Zhang
Keyword(s):  
Horizontal Plane ◽  
Maximum Velocity ◽  
Aluminum Electrolysis ◽  
Raw Material ◽  
Stable Operation ◽  
Alumina Concentration ◽  
Half Cell ◽  
Aluminum Reduction ◽  
Computational Fluid Dynamics Cfd ◽  
Reduce Energy Consumption

Alumina is an indispensable raw material for the modern aluminum electrolysis industry. The distribution and transmission of alumina within the bath is of great significance to maintain stable operation and reduce energy consumption. In this study, a computational fluid dynamics (CFD) model was developed to investigate the bath flow and its related alumina transmission in aluminum reduction cells. The bath flow driven by bubbles, electromagnetic force, and aluminum flow presented two different sized vortices in the horizontal plane of the anode–cathode distance (ACD). Both numerical results and industrial data show that the average alumina concentration in the half-cell at the duct end is slightly larger than that of the tap end. With the application of slotted anodes, the maximum velocity of the bath flow increased and the average velocity decreased slightly in the horizontal plane, resulting in a more uniform distribution of alumina than that in the use of unslotted anodes. The symmetrical nature of the bath flow vortices became more obvious with the upgrade of the busbar design and the alumina concentration gradient became smaller within the bath.

Research on the Penetration Depth in Aluminum Reduction Cell with New Type of Anode and Cathode Structures

JOM ◽  
2014 ◽  
Vol 66 (7) ◽  
pp. 1202-1209 ◽  
Author(s):  
Liu Yan ◽  
Li Yudong ◽  
Zhang Ting’an ◽  
Feng Naixiang
Keyword(s):  
Penetration Depth ◽  
Aluminum Reduction Cell ◽  
Aluminum Reduction ◽  
Reduction Cell ◽  
New Type

Online Anode Current Signal in Aluminum Reduction Cells: Measurements and Prospects

JOM ◽  
2015 ◽  
Vol 68 (2) ◽  
pp. 623-634 ◽  
Author(s):  
Shuai Yang ◽  
Zhong Zou ◽  
Jie Li ◽  
Hongliang Zhang
Keyword(s):  
Anode Current ◽  
Current Signal ◽  
Aluminum Reduction

Cairo University and EgyptAlum: 20 years of cooperation in aluminum reduction

JOM ◽  
2003 ◽  
Vol 55 (5) ◽  
pp. 48-52 ◽  
Author(s):  
Saad El-Raghy ◽  
Zaki Bassiony
Keyword(s):  
Aluminum Reduction

Liquidus Temperature of Electrolytes for Aluminum Reduction Cells

2016 ◽  
pp. 701-704
Author(s):  
Dong Shi ◽  
Bing-liang Gao ◽  
Zhao-wen Wang ◽  
Zhong-ning Shi ◽  
Xian-wei Hu
Keyword(s):  
Liquidus Temperature ◽  
Aluminum Reduction
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