Effect of HS Binder on Reducing the Amount of Bentonite in Oxidized Pellets

In order to decrease the amount of bentonite in the production of oxidized pellets, the addition of HS binder is carried out in response to the problems of wasting of resources, high costing and serious pollution in the production and application of bentonite in China. In this study, the effect of the organic binder in iron ore pellets was characterized by using pelletizing, preheating and roasting experiments; the optimal ratio of HS binder to bentonite was determined. The results showed that combination of bentonite and HS binder can significantly reduce the amount of bentonite. When the ratio of bentonite of HS binder was HS binder dosage 0.2% and bentonite dosage 0.7%, the drop strength of green pellets reached 3.2 times/(0.5 m) and the amount of bentonite reduced the mass of 1.6% compared with that of without HS binder. Under the best preheated roasted conditions, the strength of the preheated ball was 436.9 N/P and the roasted ball strength achieved 2794.3 N/P, which could meet the demands.