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Production of ductile iron using an indigenous 100kg rotary furnace was achieved using the ladle treatment/sandwich cover ladle method. Powdered Ferrosilicon magnesium of 400g was used as a nodularizer together with powdered Ferrosilicon of 20g was used as innoculant. The nodularizer was put in a cylindrical pocket at the base of the ladle with a circular fitting steel plate cover welded to a handle which was removed immediately after tapping the molten metal from the rotary furnace. The resulting melt was subsequently poured into the mould after the violent reaction between the molten metal and the nodularizer. Samples of the as-cast were subjected to metallographic process and characterized using a Nikon Eclipse metallurgical microscope and a Hilger Analytica atomic mass absorption spectrometer for percentage elemental analysis. The average percentage element weight of the samples and microstructures of 200X and 400X compared favourably with the ductile iron produced from standard procedure.

Production of Ductile Iron Using Indigenously Manufactured Rotary Furnace