Comparison between bentonite and serpentinite in the production process of iron ore pellets

Rem: Revista Escola de Minas

Ottavio Raul Domenico Riberti Carmignano²  Cornélio De Freitas Carvalho¹ 

[1] ,Companhia Pedras Congonhas Ltda.

关键词: iron ore pelletizing;    serpentinite;    bentonite;    Pelotização do minério de ferro;    serpentinito;    bentonita;   

DOI  :  10.1590/S0370-44672014000100007

来源: SciELO

【 摘 要 】

Pelletizing iron ore fines is an agglomeration process that through a thermal treatment converts the ultra-fines fraction thereof into small balls ranging in size from 8mm (0.31 in.) to 18mm (0.71 in.), with adequate characteristics for feeding steel reduction works. The binder more used to make pellets is bentonite, which is an item of significant cost in the process. The present paper aims at evaluating the use of serpentinite instead of bentonite. The results obtained show that the full substitution of bentonite for serpentinite is unfeasible. However a potential does exist for using serpentinite and bentonite together in the iron ore palletizing process in the proportion of 1:1.

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