ABSTRACT

The depletion of high-grade iron ores has necessitated the beneficiation of low-grade iron ores. Flotation is considered the most efficient operation to upgrade the iron content of fine-grained ores that do not respond to gravity or size classification units. Out of several reagents used in iron ore reverse flotation, depressants play a crucial role in selectively making the iron oxides hydrophilic and prohibiting them from reporting to the gangue-rich froth phase. Starch is widely used as the depressant in iron ore flotation. The present paper attempts to highlight different facets of starch as an iron ore depressant. It reviews the important research papers that discuss the origin and chemistry of starch, starch-iron oxide interaction mechanism, and the application of different types of starches and their alternatives in iron ore flotation.

摘要

高品位铁矿石的枯竭使得低品位铁矿石的选矿成为必要。浮选被认为是提高对重力或尺寸分类单位没有反应的细粒矿石的铁含量的最有效操作。在铁矿石反浮选中使用的几种试剂中，抑制剂在选择性地使氧化铁亲水并阻止它们报告到富含脉石的泡沫相中起着至关重要的作用。淀粉被广泛用作铁矿石浮选的抑制剂。本文试图突出淀粉作为铁矿石抑制剂的不同方面。它回顾了讨论淀粉的起源和化学、淀粉-氧化铁相互作用机制以及不同类型淀粉及其替代品在铁矿石浮选中的应用的重要研究论文。