The rod processing takes the filled element tube assemblies and passes these through reduction rollers. This process reduces the diameter and compacts the magnesium oxide resulting in a lengthening of the rod to the required dimension and electrical specification.
To enable an element rod to be formed an annealing operation is required. In the majority of cases this is carried out in an exothermic atmospherically controlled electric furnace. This not only anneals the element but controls the oxidation on the sheath.
Local annealing is carried out where the element form is not complex. A bright annealing process can also be offered for stainless steel tube products.
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