Evaluating a new material for Hall-Heroult cell cathodes

JOM | August 1, 1997| | Copyright

INTRODUCTION

The Hall-Heroult process for producing primary aluminum is used extensively throughout the world; an estimated 18 million tonnes of aluminum are produced each year by electrowinning aluminum oxide. Despite its widespread use and long history, HallHeroult cells experience process inefficiencies that lead to electrical energy waste. The cells are expensive to construct and operate and are also a significant source of pollution.

The materials used in the structural components of Hall-Heroult cells have changed little since their initial invention. Large refractory cells are ...

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