The diferrent chemistry (impurity ratios and contained volatiles, not just Fe) and physical characteristics (size distribution, reduceability, decrepitation index etc) bteween different iron ores do matter.
As does value in use. Pellets are the first iron ore source displaced when demand for blast furnance productivity reduces.
The mangetite followers should drop their obession claiming magnetite economics aren't all that much different from hematite, those of you who do get up will be cutting each other throats to compete with Chinese domestic magnetite production.
Treadgold recent article was right
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