ZnSO4-FeSO4溶液氧压水热强化针铁矿法除铁行为与机理

冶金工程 • 矿业工程 • 化学化工

ZnSO4-FeSO4溶液氧压水热强化针铁矿法除铁行为与机理

杨博，

陆占清，

周东风，

李兴彬，

彭晓华，

李人杰，

魏昶，

邓志敢

中国有色金属学报

第34卷, 第11期

pp.3750-3765

纸质出版 2024-11-28

DOI：10.11817/j.ysxb.1004.0609.2024-45056

中图分类号：TF813

10400

针对湿法炼锌过程中针铁矿法锌铁分离效率低、沉铁产物性能差等问题，本文提出了在氧压水热环境下开展针铁矿法除铁的方法。结果表明：提高反应温度、氧分压、搅拌转速、晶种用量和pH均有利于针铁矿除铁。在反应温度为110 ℃、氧分压为0.2 MPa的优化反应条件下，产出的沉铁产物中铁含量为55.2%，锌含量为3.2%，硫含量为1.5%；沉铁产物中生成了结晶度较高的针铁矿晶簇。在氧压水热除铁过程中，反应在0~60 min时符合一级反应动力学特征，在60~100 min时满足二级反应动力学特征，反应活化能为34.50 kJ/mol；在110 ℃下除铁反应的速率常数(k)为0.021 dm³/(mol·min)。

湿法炼锌针铁矿氧压水热结晶度

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