Paper Title:
Selection of Cast Iron Grade for Stub-Anode Fixation in Aluminum Electrolytic Cells
  Abstract

This work is a trial to reach the optimum composition and structure of cast iron used for anode fixation in the aluminum electrolytic cells. Grey iron with low- and high-phosphorus contents, spheroidal graphite irons with compositions typical of ferritic and pearlitic grades as well as grey iron with different carbon equivalent values were compared. A bench-scale experimental set up was used to simulate the operating conditions at the steel stub/cast iron collar/carbon anode connection. The change in microstructure and electrical resistance was measured at temperatures up to 850°C for 30 days, which correspond to the electrolytic cell operating conditions. The thermal expansion properties of irons were measured using a high precision automatic dilatometer. The electrical resistance at the connection was found to decrease with spheroidal graphite irons. In flake graphite irons the resistance decreases with lower phosphorus content as well as higher CE values due to the enhanced graphitization potential during solidification, which increases the contact pressure at the connection. Decomposition of ledeburitic carbides in the structure plays – to lower extent – some role in increasing the contact pressure. This contact pressure rather than the resistivity of the cast iron seems to play the dominant role in determining the electrical resistance of the connection.

  Info
Periodical
Edited by
Adel Nofal and Mohamed Waly
Pages
435-440
DOI
10.4028/www.scientific.net/KEM.457.435
Citation
A. Nofal, M. Waly, A. Ahmed, M. Agour, "Selection of Cast Iron Grade for Stub-Anode Fixation in Aluminum Electrolytic Cells", Key Engineering Materials, Vol. 457, pp. 435-440, 2011
Online since
December 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Bao Guo Zhao, Zhi Ming Du, Lin Shuang Zhao, Shuai Yang
Abstract:Pyrotechnical battery is successfully prepared, including an anode and cathode having pyrotechnic charges with an excess of fuel-anode and an...
1361
Authors: Jin Liu, Dong Wei Li, Zhong Hui Xu
Chapter 2: Frontiers of Building Materials
Abstract:This paper aims to investigate the effects of different VG (voltage gradient) on electrokinetic removal technology, and examine electrode pH,...
1099
Authors: Xue Tao Yuan, Xu Dong Lv, Zhi Qiang Hua, Lei Wang, Tao Li
Chapter 4: Metallurgy Materials and Environmental Engineering
Abstract:Anodic polarization behavior of ternary alloy Pb-0.08%Ca-1%Sn is studied by potentiodynamic polarization measurements, corrosion rate, the...
349
Authors: Ling Long Kong, Jie Zhao, Zhi Yuan Wang, Lei Li, Ning Xu, Xu Ma
Chapter 9: Energy Materials and Fuel Technology
Abstract:Silicon/carbon anode materials of different proportions for lithium ion battery were prepared by high energy ball milling. The composites...
1050