Comprehensive Utilization of Iron Ore Tailings: a Review of Sustainable Practices and Technologies
摘要
As a by-product of iron ore mining and processing, iron ore tailings (IOT) possess stable chemical properties that severely limit their potential for reuse. Currently, many mining areas still rely on stockpiling to dispose of IOT, a practice that not only carries the risk of geological disasters, but also consumes valuable land resources and pollutes the environment. This paper systematically reviews the physicochemical properties of IOT, analyzes the environmental hazards associated with their accumulation, and summarizes recent advancements in their comprehensive utilization, including the recovery of valuable elements, preparation of backfill materials, development of construction materials, synthesis of soil conditioners, and production of chemical materials such as adsorbents and catalysts. Despite these promising pathways, the transition from laboratory research to industrial application faces challenges related to economic viability, process standardization, and long-term environmental safety. Future research should focus on developing low-cost activation technologies, enhancing the long-term durability and eco-efficiency of IOT-derived products, and integrating policy-driven incentives to promote market adoption. This review aims to provide a scientific basis and strategic reference for the high-value, sustainable utilization of IOT in the context of a circular economy.