PROCESSES FOR PREPARING FERRONICKEL AND FERRONICKEL SMELTING MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a process for preparing ferronickel which stably, efficiently and inexpensively prepares ferronickel having a high Ni content, even when using a low-quality raw material containing nickel oxide.;SOLUTION: When heating and reducing an agglomerate 4, which is obtained by agglomerating a mixture comprising the raw material 1 containing nickel oxide and iron oxide and a carbonaceous reducing material 2 in a granulator 3, in a moving bed furnace 5, the furnace retention time of the agglomerate 4 is adjusted to obtain a reduced agglomerate 6 having an Ni metallization of ≥40%, preferably ≥85% and an Fe metallization which is ≥15% lower than the Ni metallization. The reduced agglomerate 6 wherein Ni is preferentially reduced over Fe is melted in a melting furnace 7 to obtain ferronickel 8 having a high Ni content.;COPYRIGHT: (C)2004,JPO