活化剂强化钛精矿酸浸过程研究

王海波; 龙涛; 向龙; 李礼; 田从学

doi:10.7513/j.issn.1004-7638.2024.06.004

活化剂强化钛精矿酸浸过程研究

doi: 10.7513/j.issn.1004-7638.2024.06.004

王海波^{1, 2,},
龙涛³,
向龙³,
李礼^3, ,,
田从学⁴

1.
钒钛资源综合利用国家重点实验室, 四川攀枝花 617000
2.
四川大学化学工程学院, 四川成都 610065
3.
重庆理工大学化学化工学院, 重庆 400054
4.
攀枝花学院钒钛学院, 四川攀枝花 617000

基金项目: 钒钛资源综合利用产业技术创新战略联盟协同项目（PGWX2023021）。

详细信息

作者简介:
王海波，1985年出生，湖南邵阳人，硕士研究生，高级工程师，从事钛资源及硫酸法钛白副废综合利用方面研究，E-mail：15273187604@163.com

通讯作者:
李礼，1984年出生，女，四川泸州人，副教授，博士，研究方向为化工过程强化，纳米材料，E-mail：chenlili@cqut.edu.cn

中图分类号: TF823,TQ630.9
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出版历程
- 收稿日期: 2024-06-04
- 网络出版日期: 2024-12-30
- 刊出日期: 2024-12-30

Research on activator enhanced acid leaching process of titanium concentrate

Wang Haibo^{1, 2
,},
Long Tao³,
Xiang Long³,
Li Li^{3
, ,},
Tian Congxue⁴

1.
State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization, Panzhihua 617000, Sichuan, China
2.
College of Chemical Engineering, Sichuan University, Chengdu 610065, Sichuan, China
3.
School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China
4.
School of Vanadium and Titanium, Panzhihua University, Panzhihua 617000, Sichuan, China

摘要

摘要: 针对硫酸法钛白生产中反应酸浓度较高导致不能实现硫酸平衡的问题，通过引入活化剂强化酸解反应过程，降低反应酸浓度。研究了活化剂对钛精矿低浓度酸浸的强化作用，考察了反应酸浓度和活化剂加量对反应温度和钛浸出率的影响。结果表明：活化剂的加入，可以增加反应放热量，提高反应温度，并改善固相物的疏松度，浸出活性更高；活化剂加量为0.5%、酸矿比为1.56∶1，反应酸浓度为80%的条件下，钛精矿的钛浸出率达到93.47%；酸浸残渣主要成分为TiFeO₃、Ca(Fe, Mg)Si₂O₆和SiO₂，表明原料中的钛大部分被转移到液相中。
- 钛精矿 /
- 酸浸 /
- 活化剂 /
- 固相物
Abstract: In response to the problem of high reaction acid concentration in the production of titanium dioxide by sulfuric acid method, which leads to the inability to achieve sulfuric acid equilibrium, an activator is introduced to enhance the acid hydrolysis reaction process and reduce the reaction acid concentration. The strengthening effect of the activator on the low concentration acid leaching of titanium concentrate was studied, and the effects of reaction acid concentration and activator dosage on reaction temperature and acid leaching rate were investigated. The results show that the addition of activating agent can increase the heat release of the reaction, increase the reaction temperature, and improve the porosity of the solid phase, resulting in higher leaching activity. Under the conditions of 0.5% activator dosage, 1.56:1 acid to ore ratio, and 80% reaction acid concentration, the acid hydrolysis rate of titanium concentrate reaches 93.47%. The main components of acid leaching residue are TiFeO₃, Ca(Fe, Mg)Si₂O₆ and SiO₂, indicating that most of the titanium in the raw material can be transferred to the liquid phase.
- titanium concentrate /
- acid leaching /
- activator /
- solid phase

HTML全文

图 1 不同反应酸浓度下的钛浸出率

Figure 1. Effect of acid concentration on Ti leaching rate

（a）50%；（b）60%；（c）70%；（d）80%

下载: 全尺寸图片幻灯片

图 2 酸矿比对最高反应温度和Ti浸出率的影响

Figure 2. Effect of acid-to-ore ratio on the maximum reaction temperature and Ti leaching rate

下载: 全尺寸图片幻灯片

图 3 活化剂添加量对最高反应温度、钛浸出率及膨胀体积的影响

Figure 3. Effect of activator addition on the maximum reaction temperature, Ti leaching rate and expansion volume

下载: 全尺寸图片幻灯片

图 4 反应酸浓度对最高反应温度、膨胀体积及钛浸出率的影响

Figure 4. Effect of acid concentration on the maximum reaction temperature, expansion volume and Ti leaching rate

下载: 全尺寸图片幻灯片

图 5 钛精矿和酸浸残渣的XRD谱

（a）钛精矿；（b）未加活化剂酸浸残渣；（c）加活化剂酸浸残渣

Figure 5. XRD patterns of titanium concentrate and acid leaching residue

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图 6 酸浸残渣SEM和EDS分析

(a）（b）未加活化剂酸浸残渣；（c）（d）加活化剂酸浸残渣

Figure 6. SEM and EDS analysis of acid leaching residue

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表 1 不同废酸浓度下酸平衡时的反应酸浓度

Table 1. Reaction acid concentrations at acid equilibrium under different wasts acid concentration

酸矿比	不同废酸浓度(%)下反应酸浓度/%
酸矿比	20	30	40	45	50	55	60
1.52	47.32	60.40	70.09	74.0	77.56	80.68	83.48
1.53	47.48	60.56	70.22	74.17	77.66	80.77	83.56
1.54	47.64	60.71	70.35	74.29	77.77	80.86	83.64
1.55	47.80	60.86	70.48	74.40	77.87	80.96	83.72
1.56	47.96	61.00	70.61	74.52	77.97	81.05	83.80

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表 2 不同反应酸浓度下酸浸反应参数

Table 2. Acid leaching reaction parameters under different reaction acid concentrations

反应酸浓度/%	沸点/ ℃	最高反应温度/ ℃
50	124	119
60	141.8	128
70	162.2	138
80	200	169
84	221.3	179

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表 3 酸浸残渣成分分析

Table 3. Compositions of acid hydrolysis residue %

成分	SiO₂	Fe₂O₃	MgO	S	TiO₂	CaO	MnO	Cr₂O₃
未加活化剂	1.75	20.77	0.72	4.65	31.61	1.09	0.32	0.67
活化剂加量0.5%	3.69	12.31	0.44	6.41	21.70	2.85	0.10	0.07

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