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Mechanically activated starch improved iron ore beneficiation via molecular structure optimization and free radical effects
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DOI：10.1016/j.colsurfa.2026.140727.png)
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Abstract
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• Mechanical activation (MA) is introduced to modify the depressant starch for hematite flotation. • Optimized MA conditions maximize starch depression ability. • MA increases the starch branches to improve its adsorption on the hematite surface. • Excessive MA seriously damages the starch molecular structure to lose its depressing ability. • Two carbon-centered free radicals are generated by MA to increase starch activity. • Moderate MA condition increases starch adsorption energy on the hematite surface.
Keywords:
starch
mechanical activation
hematite flotation
molecular structure
free radicals
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