Enhanced biopolymer binder designed to reduce slag and increase ore content with reactivity and tensile strength advantages. TacBond maintains agglomerates through the sintering process resulting in the production of higher grade iron ore pellets.

Introduction

The iron ore pelletization process (IOP) process forms pellets consisting of iron ore, flux agents, and binding agents. In addition to the quality of the ore itself, the final iron content of the finished pellet is impacted by the amount of flux and binders required to bind and shape the pellets. Iron is beneficiated from run-of-mine iron fines and then bound into pellets with bentonite or organic binders. Bentonite is a silicate mineral phase that once fired to high temperatures produces non-ore bearing mullite or “slag”. The iron ore industry has been developing alternative binders to reduce the amount of slag produced in
the blast furnace.

HPPE supported third party laboratory evaluations of its family of binder biopolymers for the opportunity to improve the binding strength of the ore pellets, and reduce waste and attendant costs. Advances in water-based biopolymer chemistry have enhanced their performance in these applications by maintaining or increasing pellet strength while not developing viscosity or residue during the entire process

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