Overview
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François HERBULOT : Engineer from the École nationale supérieure des arts et métiers (ENSAM) - Former Technical Director, Aluminium Pechiney Casting Division - Chairman of the Technical Committee of the European Association of Aluminium Refiners
INTRODUCTION
Starting from raw secondary raw materials (new waste or old scrap), the preparation technologies used are very similar to those used in the mineral industry to prepare complex ores.
The preparation of secondary raw materials is either carried out on the aluminum refinery's own site, or in independent units specialized solely in the preparation of raw materials, or on the site where these raw materials are recovered and collected: it's an activity that requires substantial and costly tools, as well as technical and commercial know-how.
This preparation can be divided into two phases:
grinding, which reduces and densifies the raw material using a variety of tools whose power can reach and exceed 1,000 kW ;
treatment, which separates the components of the raw material by means of various physical and physico-chemical processes.
The complete study of the subject includes the articles :
— Aluminium recovery and recycling. Strategy;
— [M 2 346] Aluminium recovery and recycling. Raw materials (this article) ;
— Aluminium recovery and recycling. Smelting and shaping;
— Aluminium recovery and recycling.
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Aluminium recovery and recycling. Raw materials
Grinding
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