Integrated Process Validated for Boron/Iron Separation from Ludwigite Ore
A new integrated process for boron and iron separation from ludwigite ore has been successfully validated, achieving significant efficiency metrics. This development is crucial for enhancing resource utilization in China's industrial and defense sectors.
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A validated integrated process for separating boron and iron from boron-iron mixed concentrate (BIMC) has been developed, achieving a boron leaching efficiency of 70.23% and an iron grade of 94.12 wt% in the magnetic concentrate. The process involves reductive soda-ash roasting in a rotary kiln, followed by wet-grinding, magnetic separation, and fractional crystallization.
The reduced iron powder produced can serve as feed for short-process steelmaking, while high-purity boric acid (>99 wt%) can be prepared from the boron-rich liquor. This process enhances the sustainable utilization of ludwigite ore, a strategic mineral resource in China, which is vital for national defense and industrial growth.
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