Journal of the Southern African Institute of Mining and Metallurgy
On-line version ISSN 2411-9717
MBELE, P. Pelletizing of Sishen concentrate. J. S. Afr. Inst. Min. Metall. [online]. 2012, vol.112, n.3, pp. 221-228. ISSN 2411-9717.
Iron ore concentrate is not easily transported to, or processed in, ironmaking plants, therefore it is necessary to agglomerate. This paper will determine the possibility of agglomerating Sishen concentrate into suitable ironmaking feedstock. Pelletizing is one of the conventional and preferred agglomeration processes for iron ore concentrate investigated at Kumba Value-In-Use Laboratories. Sishen concentrate was mixed with binder, and then pelletized using a laboratory pelletizing disc; afterwards the green pellets were indurated at high temperatures to give strength high enough to survive handling and lessen disintegration in the shaft during ironmaking. Sishen pellets have satisfactory physical and metallurgical properties which make them suitable feedstock for the direct reduction processes. These were tested under Midrex shaft operational conditions and performed well, with a metallization of 94.47% being attained.
Keywords : pelletizing; pellets; Sishen concentrate; iron ore concentrate.