越南安沛铁矿伴生稀土资源开发利用

张亮玖; 潘务霞; 周慧荣; 郭怀兵

doi:10.3969/j.issn.1000-6532.2023.05.008

越南安沛铁矿伴生稀土资源开发利用

doi: 10.3969/j.issn.1000-6532.2023.05.008

张亮玖^{1, 2,},
潘务霞¹,
周慧荣¹,
郭怀兵^2, ,

1.
广西国盛稀土新材料有限公司，广西　崇左　532200
2.
中铝广西有色稀土开发有限公司，广西　南宁　530024

基金项目: 广西创新驱动发展专项资金项目（桂科AA19254022）；崇左市科技计划项目（崇科FA2020017）

详细信息

作者简介:
张亮玖（1988-），男，本科，工程师，研究方向为稀土冶炼

通讯作者:
郭怀兵（1987-），男，硕士，工程师，研究方向为稀土冶炼

中图分类号: TD981；TF845
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- 被引次数: 0
出版历程
- 收稿日期: 2022-06-20

Utilization and Development of Associated Rare Earth Resources of the Iron Ore in Yen Bai Province, Vietnam

1.
Guangxi Guosheng Rare Earth New Material Co., Ltd., Chongzuo, Guangxi, China
2.
Chinalco Guangxi Nonferrous Rare Earth Development Co., Ltd., Nanning, Guangxi, China

摘要

摘要: 这是一篇冶金工程领域的论文。针对越南安沛地区某铁矿尾矿磁选后得到的含稀土富集物无法直接利用问题，采用硫酸焙烧工艺、萃取富集转型技术对其进行实验开发，考查硫酸焙烧、水浸、除杂、转型等过程的工艺参数对实验效果的影响，确定较佳工艺技术条件。实验表明，采用酸矿比（体积∶质量）=0.7，焙烧温度250 ℃，焙烧时间2 h，浸出水∶矿=4进行焙烧和水浸，以除杂剂浓度0.1 g/mL，除杂终点pH值=4.2进行除杂，以O∶A=1.5~2进行5级逆流萃取，O∶A=10∶1进行5级逆流反萃，整体收率可达90.1%~92.88%，稀土浓度在1.5 mol/L左右，杂质铁、铝含量均低于100 mg/L，满足工业化应用的需求，实现对越南安沛铁矿伴生稀土资源开发利用。
- 冶金工程 /
- 越南安沛 /
- 铁矿 /
- 稀土 /
- 伴生资源 /
- 开发利用
Abstract: This is an essay in the field of metallurgical engineering. Aiming at the problem that the rare earth enrichment after magnetic separation of iron ore tailings in Yen Bai Province, Vietnam cannot be directly utilized, the sulfuric acid roasting process and extraction and enrichment transformation technology are used to carry out experimental development. The process parameters of sulfuric acid roasting, water leaching, impurity removal, transformation and other processes were systematically studied and observed how work on the effect of the experiment and the most optimum technological conditions were determined. The experiment showed the acid and ore ratio (volume: mass) is 0.7, the roasting temperature is 250 degrees Celsius, the roasting time is 2 hours, the leaching water and ore ratio is 4, and the roasting and leaching process was carried out under the above conditions. Impurity removal was carried out with a concentration of 0.1 g/mL and a pH of 4.2 as the endpoint. The grade 5 counter-current extraction was carried out under the O/A of 1.5~2, the 5 counter-current back extraction was carried out under the O/A rate of 10:1, the overall recovery rate reached 90.1%-92.88%, the rare earth concentrations is 1.5 mol/L, the content of iron and aluminum is lower than 100 μg/mL, and met the requirement of the industrial applications, and realized the utilization and development of the accompanied rare earth resources of the iron ore tailings in Yen Bai Province, Vietnam.
- Metallurgical engineering /
- Yen Bai Province Vietnam /
- Iron ore /
- Rare earth /
- Associated resources /
- Development and utilization

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图 1 实验工艺流程

Figure 1. Test process flow chart

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图 2 浓硫酸用量对浸出效果影响

Figure 2. Effect of concentrated sulfuric acid dosage on leaching effect

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图 3 焙烧温度对浸出效果影响

Figure 3. Effect of roasting temperature on leaching effect

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图 4 焙烧时间对浸出效果影响

Figure 4. Effect of roasting time on leaching effect

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图 5 液固比L/S对浸出率的影响

Figure 5. Effect of liquid-solid ratio on leaching rate

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表 1 安沛矿半定量分析检测结果/%

Table 1. Semi-quantitative analysis and detection results of Yen Bai mine

Fe₂O₃	SiO₂	Al₂O₃	K₂O	MgO	TiO₂	CaO	Y₂O₃	Nd₂O₃	La₂O₃	Gd₂O₃
45.5	19.4	5.3	0.1	3.1	1.1	0.7	11.4	4.3	1.8	1.6

Sm₂O₃	Dy₂O₃	Yb₂O₃	Er₂O₃	Pr₆O₁₁	MnO	ThO₂	Co₂O₃	BaO	SO₃	U₃O₈
1.3	1.2	0.7	0.6	0.5	0.5	0.2	0.2	0.2	0.1	0.07

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表 2 浸出液参数

Table 2. Leachate parameters

TREO	H⁺	Fe₂O₃	Al₂O₃
20.67 g/L	1.800 mol/L	23719 mg/L	16054 mg/L

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表 3 除杂剂浓度对收率影响

Table 3. Effect of impurity remover concentration on yield

MgO浆液浓度/ （g/mL）	pH值	Fe₂O₃/ (mg/L)	Al₂O₃/ (mg/L)	回收率/ %
1	4.4	＜100	＜100	69.67
0.5	4.4	＜100	＜100	80.04
0.1	4.4	＜100	＜100	94.18
0.05	4.4	＜100	＜100	95.26

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表 4 不同pH值终点实验结果

Table 4. Test results of different pH endpoints

pH值	Fe₂O₃/(mg/L)	Al₂O₃/(mg/L)	回收率/%
4.1	274	219	96.13
4.2	133	110	94.18
4.3	＜100	＜100	88.15
4.4	＜100	＜100	85.18
4.5	＜100	＜100	80.75
5.0	＜100	＜100	70.23

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表 5 萃取条件及结果

Table 5. Extraction conditions and results

有机皂化度/(mol/L)	料液稀土浓度/(mol/L)	O∶A	负载有机稀土浓度/(mol/L)	余液稀土浓度/(mol/L)
0.45~0.6	0.105	1∶1	0.1	＜0.01
0.45~0.6	0.105	1∶1.5	0.156	＜0.01
0.45~0.6	0.105	1∶2	0.21	＜0.01
0.45~0.6	0.105	1∶3	到第三级时乳化	＜0.01

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表 6 反萃条件及结果

Table 6. Stripping conditions and results

负载有机浓度/ (mol/L)	盐酸浓度/ (mol/L)	O∶A	反萃液稀土浓度/ (mol/L)	反萃液H⁺浓度/ (mol/L)	回收率/% （按除杂后硫酸稀土）
0.156	6	10∶2	0.7762	3.57	99.51
0.156	6	10∶1.5	1.0294	2.76	98.98
0.156	6	10∶1	1.5321	1.18	98.21
0.156	6	10∶0.8	1.8427	0.41	94.50

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表 7 综合实验结果

Table 7. Comprehensive test results

实验编号	稀土收率/%	REO浓度/ (mol/L)	Fe₂O₃/ (mg/L)	Al₂O₃/ (mg/L)
1	92.88	1.5451	＜100	＜100
2	92.35	1.4687	＜100	＜100
3	90.1	1.5226	＜100	＜100
4	92.27	1.5372	＜100	＜100
5	90.98	1.4815	＜100	＜100

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