OPTIMAL NON-FERROUS MELT CONTROL WITH SPARK OES HOW TO ACHIEVE OPTIMAL MELT CONTROL IN NON-FERROUS WITH OES ANALYSIS INTRODUCTION 2016 saw global casting production hit around 104,4 million tonnes. Grey, ductile and malleable iron makes up 70% of all castings, with the remaining 30% comprising steel castings and non-ferrous metal castings, such as aluminium, copper, zinc, magnesium and others. Of the…