Abstract
The softening and melting behavior of cold bond pellets of iron ores with the use of portland cement as binder was investigated.
(1) The reducibility of cold bond pellets is generally better than that of fired pellets.
(2) The cold bond pellets have a stronger tendency to shrinkage than fired pellets, due to sintering.
(3) Melt-down behavior of cold bond pellets is characterized by the melting down of slag prior to that of metal. Melt-down slag of cold bond pellets contains much FeO.
(4) For the improvement of melt-down behavior of cold bond pellets, it is effective to decrease cement ratio within the limit that the required crushing strength is ensured, to make basicity higher, to use dolomite as a flux, and to include solid carbon as a reducing agent.
