CO–CO<sub>2</sub>–N<sub>2</sub>气氛下硼镁铁矿钠化焙烧制备硼砂及磁铁精矿的工艺研究

游锦香; 王静; 饶明军; 张鑫; 罗骏; 彭志伟; 李光辉

doi:10.1007/s12613-023-2643-4

Volume 30 Issue 11

Nov. 2023

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文章导航 > 矿物冶金与材料学报（英文） > 2023 > 30(11): 2169-2181

Jinxiang You, Jing Wang, Mingjun Rao, Xin Zhang, Jun Luo, Zhiwei Peng, and Guanghui Li, An integrated and efficient process for borax preparation and magnetite recovery from soda-ash roasted ludwigite ore under CO–CO₂–N₂ atmosphere, Int. J. Miner. Metall. Mater., 30(2023), No. 11, pp. 2169-2181. https://doi.org/10.1007/s12613-023-2643-4

Cite this article as:

Jinxiang You, Jing Wang, Mingjun Rao, Xin Zhang, Jun Luo, Zhiwei Peng, and Guanghui Li, An integrated and efficient process for borax preparation and magnetite recovery from soda-ash roasted ludwigite ore under CO–CO2–N2 atmosphere, Int. J. Miner. Metall. Mater., 30(2023), No. 11, pp. 2169-2181. https://doi.org/10.1007/s12613-023-2643-4

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研究论文

CO–CO₂–N₂气氛下硼镁铁矿钠化焙烧制备硼砂及磁铁精矿的工艺研究

1)
中南大学资源加工与生物工程学院，长沙 410083，中国
2)
中南大学化学化工学院，长沙 410083，中国

通讯作者:
饶明军 E-mail: mj.rao@csu.edu.cn

李光辉 E-mail: liguangh@csu.edu.cn

文章亮点

(1) 系统研究了硼镁铁矿在CO–CO₂–N₂气氛下焙烧转化的影响规律。

(2) 开发了硼镁铁矿控制气氛焙烧同步制备硼砂和磁铁精矿工艺。

(3) 92%wt%的硼在湿磨过程中浸出，89wt%的铁富集于磁铁精矿中。

(4) 含硼浸出液通过碳酸化法分离制备高纯硼砂。

中文摘要

为实现硼镁铁矿资源的高效综合利用，本文提出了一种硼镁铁矿钠化焙烧–湿磨浸出–磁选–碳分实现硼/铁高效分离的工艺。研究了焙烧参数包括：焙烧温度、时间、碳酸钠用量以及还原势CO/(CO+CO₂)对硼、铁同步分离指标的影响。在优化的焙烧条件下：焙烧温度850°C、焙烧时间60 min、碳酸钠用量为20wt%以及还原势CO/(CO+CO₂)为10vol%，92%的硼在湿磨过程中直接浸出到溶液中，约89%的铁通过磁选富集于磁铁精矿中，磁铁精矿的铁品位为62wt%。高品位磁铁精矿可以作为钢铁行业的原料。拉曼光谱和¹¹B核磁共振波谱结果表明硼在浸出液中以$ \mathrm{B}(\mathrm{O}{\mathrm{H})}_{4}^{-} $离子的形式存在，浸出液通过碳分–结晶制备出高纯硼砂产品。

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Research Article

An integrated and efficient process for borax preparation and magnetite recovery from soda-ash roasted ludwigite ore under CO–CO₂–N₂ atmosphere

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Abstract

Abstract

To realize the comprehensive utilization of ludwigite ore, an integrated and efficient route for the boron and iron separation was proposed in this work, which via soda-ash roasting under CO–CO₂–N₂ atmosphere followed by grind-leaching, magnetic separation, and CO₂ carbonation. The effects of roasting temperature, roasting time, CO/(CO+CO₂) composition, and Na₂CO₃ dosage on the boron and iron separation indices were primarily investigated. Under the optimized conditions of the roasting temperature of 850°C, roasting time of 60 min, soda ash dosage of 20wt%, and CO/(CO+CO₂) of 10vol%, 92% of boron was leached during wet grinding, and 88.6% of iron was recovered during the magnetic separation and magnetic concentrate with a total iron content of 61.51wt%. Raman spectra and ¹¹B NMR results indicated that boron exists as ${\rm{B}}({\rm OH})_{4}^{-}$ in the leachate, from which high-purity borax pentahydrate could be prepared by CO₂ carbonation.
- ludwigite ore;
- soda-ash roasting;
- CO–CO₂–N₂ atmosphere;
- borax

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References(40)

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CO–CO₂–N₂气氛下硼镁铁矿钠化焙烧制备硼砂及磁铁精矿的工艺研究

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An integrated and efficient process for borax preparation and magnetite recovery from soda-ash roasted ludwigite ore under CO–CO₂–N₂ atmosphere

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CO–CO2–N2气氛下硼镁铁矿钠化焙烧制备硼砂及磁铁精矿的工艺研究

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中文摘要

An integrated and efficient process for borax preparation and magnetite recovery from soda-ash roasted ludwigite ore under CO–CO2–N2 atmosphere

Abstract

References

数据统计

Catalog

CO–CO₂–N₂气氛下硼镁铁矿钠化焙烧制备硼砂及磁铁精矿的工艺研究

An integrated and efficient process for borax preparation and magnetite recovery from soda-ash roasted ludwigite ore under CO–CO₂–N₂ atmosphere