DESIGN OF CONCEPTS FOR THE UTILIZATION OF RESIDUES AND WASTES IN AJAOKUTA STEEL COMPANY

摘要

In a typical year, approximately 1.7 million tons of residues and wastes are expected from Ajaokuta integrated steel plant, Nigeria. They will be generated mainly from sinter plant, blast furnace (BF), and basic oxygen furnace (BOF) operations and during rolling and finishing. The residues and wastes include slag, dust, sludge and slurries from gas cleaning, waste water, mill scales and other associated scraps. In this paper concepts for the utilization of residues and wastes in Ajaokuta Steel Plant where no reclamation routines have been provided for in the first and second phases of its project implementation is designed. The paper analyses the sources of the iron oxide wastes and evaluates the quantities expected from the main production facilities of the plant which include the two 312 m~2 capacity sintering machines, the two 2000 m~3 blast furnaces and two 130-T BOF (of the 2~(nd) phase expansion of the Steel Plant). A reclamation routine designed for Ajaokuta residues and wastes is presented.