Selective flotation separation of ilmenite from titanaugite using n-octylphosphonic acid as collector in acidic pulp

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China Pub Date : 2025-03-01 DOI:10.1016/S1003-6326(24)66726-9

Pan CHEN , Jia-yan LIU , Ji-hua ZHAI , Yao-hui YANG , Wei SUN

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Abstract

n-octylphosphonic acid (OPA) was introduced as a novel collector for ilmenite flotation and its effectiveness was compared with the conventional chelating collector, benzohydroxamic acid (BHA). Micro-flotation tests demonstrated that OPA was a highly effective and selective collector for separating ilmenite from titanaugite over acidic conditions (optimal pH around 3), which was also supported by adsorption amount measurements. X-ray photoelectron spectroscopy (XPS) tests indicated that the chemisorption of OPA onto ilmenite surface was much stronger than that of BHA. Solution chemistry diagram analyses indicated that OPA could dissociate well at pH 3.0 and mostly exist in anion form. DFT calculations further confirmed that OPA was much easier to adsorb onto ilmenite surface with shorter bond length and lower adsorption energy in comparison with BHA. Therefore, OPA maintained good collecting ability and selectivity for ilmenite flotation in the strongly acidic pulp, providing valuable insights into new collector design and development.

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正辛基膦酸捕收剂在酸性矿浆中选择性浮选分离钛铁矿和钛辉矿

介绍了正辛基膦酸（OPA）作为钛铁矿浮选的新型捕收剂，并与传统螯合捕收剂苯甲羟肟酸（BHA）进行了效果比较。微浮选试验表明，在酸性条件下（最佳pH值约为3），OPA是一种高效、选择性的钛辉石和钛铁矿分离捕收剂，吸附量的测定也证实了这一点。x射线光电子能谱（XPS）测试表明，OPA在钛铁矿表面的化学吸附比BHA强得多。溶液化学图分析表明，OPA在pH为3.0时能较好地解离，且多以阴离子形式存在。DFT计算进一步证实，与BHA相比，OPA更容易吸附在钛铁矿表面，其键长更短，吸附能更低。因此，OPA在强酸性矿浆中对钛铁矿保持了良好的捕收能力和选择性，为新型捕收剂的设计和开发提供了有价值的见解。

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来源期刊

Transactions of Nonferrous Metals Society of China 工程技术-冶金工程

CiteScore

7.40

自引率

17.80%

发文量

8456

审稿时长

3.6 months

期刊介绍： The Transactions of Nonferrous Metals Society of China (Trans. Nonferrous Met. Soc. China), founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, INSPEC, CA, METADEX, AJ and JICST.