Abstract A resource recycling integrated with de-alkalization approach was proposed for the treatment of bauxite residue. The resource recycling process involves HCl acid leaching, Fe extraction by Aliquat 336, and two-stage neutralization precipitation. The results indicate that Ti, Sc, and Al can be effectively recovered from bauxite residue through the present approach. The liquor generated from the stripping of Fe and the leachate after precipitation consisted of large amounts of FeCl3 and CaCl2, respectively, which were effective on the de-alkalization of bauxite residue. Moreover, the de-alkalized bauxite residue was suitable for the growth of ryegrass. The resource recycling integrated with de-alkalization approach offered an environment-friendly and cost-effective way for the disposal of large-scale of bauxite residue.

中文翻译：

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资源回收与脱碱一体化处理铝土矿渣

摘要 提出了一种资源回收结合脱碱法处理铝土矿渣的方法。资源回收过程包括盐酸浸出、Aliquat 336 提取铁和两段中和沉淀。结果表明，通过本方法可以有效地从铝土矿渣中回收 Ti、Sc 和 Al。脱铁产生的液体和沉淀后的渗滤液分别含有大量的FeCl3和CaCl2，这对铝土矿渣的脱碱是有效的。此外，脱碱铝土矿渣适合黑麦草的生长。资源回收与脱碱方法相结合，为大规模处理铝土矿渣提供了一种环保、经济的方式。