亚毫米级细粒人造金红石搅拌制粒研究

任雨荞; 陈凤; 叶恩东; 郭宇峰; 张濛; 王帅; 杨凌志

doi:10.7513/j.issn.1004-7638.2025.02.012

亚毫米级细粒人造金红石搅拌制粒研究

doi: 10.7513/j.issn.1004-7638.2025.02.012

任雨荞^1,,
陈凤¹,
叶恩东^2, ,,
郭宇峰¹,
张濛¹,
王帅¹,
杨凌志¹

1.
中南大学资源加工与生物工程学院, 湖南长沙 410083
2.
钒钛资源综合利用国家重点实验室, 四川攀枝花 617000

详细信息

作者简介:
任雨荞，2000年出生，湖南常德人，博士研究生，研究方向为钒钛资源清洁生产，E-mail：225607001@csu.edu.cn

通讯作者:
叶恩东，1974年出生，四川大竹人，工程硕士，正高级工程师，研究方向为攀西钛资源综合利用，E-mail：419739881@qq.com

中图分类号: TF823
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出版历程
- 收稿日期: 2024-06-21
- 刊出日期: 2025-05-06

Study on the granulation of sub-millimeter fine-grade artificial rutile with high-speed stirring

1.
School of Resource Processing and Bioengineering, Central South University, Changsha 410083, Hunan, China
2.
State Key Laboratory of Comprehensive Utilization of Vanadium and Titanium Resources, Panzhihua 617000, Sichuan, China

摘要

摘要: 对亚毫米级细粒人造金红石搅拌制粒工艺进行研究。通过试验对比，选定最佳制粒制度为：NA为添加剂，NA添加量1.5%，制粒水分20%，混合转速为300、600 r/min的时间分别为3 、5 min，切割刀转速600 r/min。获得粒径为0.097～0.45 mm的制粒产品，制粒后粒径小于0.097 mm的颗粒占比低于15%。对制粒产品进行强度检测，干燥及1000 ℃热处理后磨损指数分别为8.54%、4.40%，表明经过热处理后颗粒的强度得到有效提升。制粒后产物在流态化氯化环境中仍能保持完整形态，氯化反应30 min后，残余物中TiO₂占比仅12.64%，氯化效果较好。
- 亚毫米级细粒人造金红石 /
- 高速搅拌 /
- 沸腾氯化 /
- 钛资源利用
Abstract: The high-speed stirring process of sub-millimeter fine-grained artificial rutile was studied in this paper. Through testing and comparison, the optimal granulation conditions were determined as follows: NA as an additive, 1.5% NA addition, 20% moisture content, a mixing speed of 300 r/min and 600 r/min for 3 and 5 minutes, respectively, and a cutting knife speed of 600 r/min. The resulting granulated products had particle sizes ranging from 0.097 mm to 0.45 mm, with particles smaller than 0.097 mm comprising less than 15% of the total. The strength of the granulated products was assessed, revealing wear indices of 8.54% after drying and 4.40% after heat treatment at 1000 °C, indicating a significant improvement in granule strength after heat treatment. The pelletized product maintained its structural integrity in a fluidized chlorination environment. After 30 min of chlorination, the residual TiO₂ content was only 12.64%, demonstrating effective chlorination performance.
- sub-millimeter fine-grade artificial rutile /
- high-speed stirring /
- boiling chlorination /
- titanium resource utilization

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图 1 亚毫米级细粒人造金红石物相及粒度组成

(a) 物相组成； (b)粒度分布

Figure 1. Phase and particle size composition of sub-millimeter fine-grade artificial rutile

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图 2 亚毫米级细粒人造金红石微观形貌

（a）颗粒粒径＞100 μm；（b）颗粒粒径＜100 μm

Figure 2. Micromorphology of sub-millimeter fine-grade artificial rutile

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图 3 设备制粒原理及内部结构示意

（a）设备制粒原理；（b）设备内部结构

Figure 3. Schematic diagram of equipment granulation principle and internal structure

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图 4 小型沸腾氯化试验装置

(a)装置整体结构；(b)内部反应器

Figure 4. Small-scale boiling chlorination experimental device

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图 5 不同粘结剂压团冷/热强度对比

Figure 5. Comparison of cold/hot strength of different binders

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图 6 亚毫米级细粒人造金红石制粒产物形貌

（a）制粒后0.097～0.45 mm粒级产物；（b）1 000 ℃热处理后颗粒；（c）（d）105 ℃干燥处理后颗粒

Figure 6. Morphology of sub-millimeter fine-grade artificial rutile granulation products

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图 7 亚毫米级细粒人造金红石制粒产物不同时间氯化后颗粒微观形貌

Figure 7. Sub-millimeter fine grained artificial rutile granulating product after different chlorination time

(a)(b) 15 min；(c)(d)30 min

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表 1 亚毫米级细粒人造金红石主要化学成分

Table 1. Main chemical composition of sub-millimeter fine grade artificial rutile %

TiO₂	TFe	SiO₂	Al₂O₃	MgO	CaO
88.62	2.40	5.19	0.394	0.615	0.753

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表 2 粘结剂添加量对产物粒度分布的影响

Table 2. Influence of binder addition on product particle size distribution

编号	NA添加量/%	制粒时间/min		切割刀转速/(r·min⁻¹)	制粒产物粒度分布/%
编号	NA添加量/%	400 r/min	600 r/min	切割刀转速/(r·min⁻¹)	+0.45 mm	0.097～0.45 mm	−0.097 mm
1	1.5	3	5	600	29.20	58.10	12.70
2	1.0				9.63	59.38	30.99
3	0.7				4.54	48.18	47.28

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表 3 制粒转速对产物粒度分布的影响

Table 3. Influence of granulation speed on product size distribution

编号	NA添加量/%	制粒转速/(r·min⁻¹)		切割刀转速 /(r·min⁻¹)	制粒产物粒度分布/%
编号	NA添加量/%	3 min	5 min	切割刀转速 /(r·min⁻¹)	+0.45 mm	0.097～0.45 mm	−0.097 mm
1	1.5	300	600	600	25.29	60.48	14.28
2		300	700		26.50	53.35	20.16
3		400	600		29.20	58.10	12.70

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表 4 切割刀转速对产物粒度分布的影响

Table 4. Influence of cutting knife speed on product particle size distribution

编号	NA添加量/%	制粒时间/min		切割刀转速/(r·min⁻¹)	制粒产物粒度分布/%
编号	NA添加量/%	300 r/min	600 r/min	切割刀转速/(r·min⁻¹)	+0.45 mm	0.097～0.45 mm	−0.097 mm
1	1.5	3	5	300	45.28	43.95	10.77
2				400	31.76	57.32	10.92
3				500	39.40	49.19	11.41
4				600	25.29	60.48	14.23

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表 5 制粒时间对产物粒度分布的影响

Table 5. Influence of granulation time on product size distribution

编号	NA添加量/%	制粒时间/min		切割刀转速/ (r·min⁻¹)	制粒产物粒度分布/%
编号	NA添加量/%	300 r/min	600 r/min	切割刀转速/ (r·min⁻¹)	+0.45 mm	0.097～0.45 mm	−0.097 mm
1	1.5	4	4	600	42.93	43.65	13.42
2		3	5		25.29	60.48	14.23
3		3	6		35.27	49.18	15.55
4		2	5		30.04	48.96	21.00

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表 6 不同条件下亚毫米级细粒人造金红石制粒产物化学成分

Table 6. Chemical compositions of sub-millimeter fine-grade artificial rutile granulation products under different conditions

组号	重量/g	化学成分/%
组号	重量/g	CaO	MgO	TFe	SiO₂	TiO₂	Al₂O₃
1	130	0.753	0.615	2.4	5.19	88.62	0.394
2	49.47	1.31	0.94	0.672	7.71	49.69	0.47
3	21.00	2.58	1.92	1.05	11.55	12.64	0.74
注：氯化后样品化学成分中包含配入石油焦，其含量未标注在内。

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