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Variation in physico-chemical
properties of iron oxide pellets using bentonite with calcium hydroxide as
binder
Bentonite and calcium hydroxide are the widely used binding materials in
iron ore pelletizing plants. This investigation deals with studying the
effect of using a mixture of both binders on the green, dry, and indurated
iron oxide pellet properties. The binder mixtures consist of 0.4% bentonite,
and varying percentage of calcium hydroxide (ranges from 0.5 to 4%). The
objective is studying the possibility of partially replacing the expensive
bentonite with cheap lime hydrate in pelletizing iron oxide. The results
show that, on using binder mixture composed of 0.4% bentonite and 0.5%
calcium hydroxide, a deterioration of the physico-chemical properties of the
mill scale pellets was observed. Whereas, by increasing the percentage of
calcium hydroxide in the binder mixture beyond 0.5%, a substantial
enhancement in these properties was achieved. |
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