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研究了新型中重稀土资源,即海底沉积物中稀土分离富集新工艺。根据沉积物中稀土矿物相与脉石矿物相之间的表面物理性质差异以及不同矿物相在酸性溶液中的稳定性差异,研究了两段分离富集的新工艺流程。首先利用选矿方法将大部分脉石与稀土矿物进行初步分离,获得预富集了稀土的精矿,然后对稀土精矿进行二次化学富集,将杂质元素进一步去除,从而获得高品位的稀土中间产品。通过两次分离富集后,海底沉积物中约99%的杂质元素可被分离,稀土在中间产品中的品位可达6.41%,与原矿相比,稀土富集倍数达67倍,有利后续单个稀土的分离,同时中间产物酸耗可降低到原矿的1/12。
Abstract：New technology for separation and enrichment of rare earths in the seabed sediments namely a kind of new medium and heavy rare earth resource was studied.According to difference in surface physical properties between rare earth mineral phase and gangue mineral phase in sediments and difference in the stability of different mineral phases in acidic solutions, a new two-stage separation and enrichment process was studied.This process first uses ore-dressing method to initially separate most of gangue and rare earth minerals to obtain a pre-enriched rare earth concentrate, and then conducts a secondary chemical enrichment of rare earth concentrate to further remove impurity elements to obtain a high-grade rare earth intermediate product.After two separation and enrichment, about 99% of the impurity elements in the seabed sediments can be separated, and grade of rare earth in intermediate product can reach 6.41%.Compared with the crude ore, enrichment multiple of rare earth is 67 times, which is beneficial to subsequent separation of individual rare earths, acid consumption of intermediate products is 1/12 of that of crude ore.
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基本信息:
中图分类号:TF845
引用信息:
[1]冯林永,蒋训雄,谭世春,等.海底稀土资源分离富集新工艺研究[J].有色金属(冶炼部分),2022(01):73-78.
基金信息:
国际海底区域资源研究开发“十三五”项目(JS-KTHT-2018-08)
2021-12-22
2021-12-22