Elkem preconditioners for optimised base iron nucleation

Preconditioning of base iron will maximise the number of potential nucleation sites in the melt and reduce nucleation “fade” over time. This will enhance the performance of inoculants and nodularisers, increasing the proportion of type “A” graphite in grey iron and the nodule density in ductile iron. This can also result in a reduced requirement for high purity pig iron in the furnace charge and lower addition rates of inoculants.

The use of a specifically designed cover material during magnesium treatment ensures maximum magnesium recovery, optimised nucleation and effective slag control. Process stability is considerably improved, enabling reductions in the addition rate of nodularisers.

Preseed® preconditioner

This preconditioner has been proven to be an effective furnace addition for cast irons. Small additions of Preseed^®both increase the number of available nucleation sites in the base iron and at the same time stabilise these crucial particles to give a long-lasting effect that can be measured right through to the final properties of the solidified iron.

Preseed^®enhances the formation of type “A” graphite in grey iron, using closely controlled additions of aluminium and zirconium to condition manganese sulphide particles which act as nuclei for graphite precipitation. Preseed^® will also retain oxide activity in the base iron so that oxygen is available for the formation of magnesium silicate nuclei in ductile iron. This will generate more nuclei and increase nodule density.

• Consistency in base irons leading to more uniform casting properties
• Improved graphite morphology
• Reduced shrinkage and carbide formation
• Improved mechanical properties
• Reduction in pig iron usage

Topseed® conditioner

Topseed^®conditioner has been designed as a cover material for MgFeSi in the treatment ladle. Topseed^®has been shown to improve Mg recovery and make a positive contribution to the nucleation levels in the iron. Stability of magnesium recovery is considerably improved, which enables optimisation of nodulariser additions. At the same time, Topseed^®can change the slag form to an easily removable condition, avoiding slag build-up in critical areas and eliminating the need for coagulants.

• Improves magnesium recovery
• Conditions the slag
• Increases residual nucleation levels
• Improves process stability

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Ekspert Mümessillik Tur. ve Tic. Ltd. Şti.

Phone : (216) 573 3888 E-Mail: info@expert.com.tr