The invention discloses an iron-containing binder for metallurgical pellet preparation and a preparation method of the iron-containing binder, and belongs to the technical field of
metallurgy. The iron-containing binder comprises the following components: 20-50% of
cobalt smelting waste residue and 50-80% of
bentonite. The preparation method of the iron-containing binder comprises the following steps: step 1, weighing the
bentonite, and adding water to prepare a turbid liquid; 2,
cobalt smelting waste residues are added into the turbid liquid, sufficient stirring is conducted, and standing is conducted for a period of time; and 3, carrying out separation and purification by using a centrifugal
machine, compacting the purified
solid matter, extruding by using a screw extruder, and loading into a sample bag for aging after the
extrusion is completed. 4, after aging is completed,
drying, smashing and sieving are conducted, and then the iron-containing binder is obtained, the binder is good in binding performance and few in residue, when the binder is used for
iron ore pellet preparation, the strength of roasted
pellets and the iron grade of pellet ore can be remarkably improved, the iron-making
economic benefits are improved, and
volume reduction, harmless and resourceful treatment of
cobalt smelting waste residues is achieved.