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Improving Electrical Conductivities of Scrap Melted Aluminium Conductor by Pre-Melt Treatment: A Review

Ismail Kamil

This review article provides an overview the way of improving electrical conductivity of scrap melted aluminium conductor by using different types pre-melt treatments in cable industry. This pre-melt treatment only by itself is not the way of achieving high purity aluminium from scraps but by combining with in-melt treatment which is using different fluxing chemicals and gases we can achieve high purity aluminium conductor product from aluminium scrap production. In Africa there are a numbers of cable industries but their usage of secondary material is very low due to the lack of product quality. One reason for this problem is lack of the steps in secondary materials treatment. Scrap melting and purification of the product controlled by energy consideration of melt process. From several metals aluminium has highest difficulty to achieve desired purity from its secondary source during melting. But there are different kinds of solution to decrease the negative impact of impurity in aluminium scrap melted products which can be applicable in pre-melt and in-melt stages. Pre-melt treatment is critical to achieve desired purity with the combination of in-melt treatment once high impurity enters in melting process it makes difficult to purification and we can make ease in-melt treatment by using this pre-melt treatment. Due to it’s widely usage the availability of aluminium scarps is high enough and this secondary material usage has enormous benefit in economic and environmental perspective. However, the presence of deleterious impurities in recycled aluminium product are the main drawback especially for electrical application since electrical conductivity property highly depends on purities of the materials. There are different kind of solutions to deal with 

undesired impurity which can be apply before melting process and during melting process. This work gives an overview about removing undesired impurities from aluminium scraps before melting process specifically for electrical conductivity application.