Interfacial adsorption and reactivity of exact separation of sphalerite and pyrite by ferrophilic inhibitors in EX−Cu(II) system

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

Transactions of Nonferrous Metals Society of China Pub Date : 2025-05-01 DOI:10.1016/S1003-6326(25)66774-4

Wen-chao DONG, Run-qing LIU, Chang-tao WANG, Zheng-qiang CAO, Wei SUN

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Abstract

Tetrasodium iminodisuccinate (IDS) was used as an inhibitor in the separation of sphalerite and pyrite in the EX−Cu(II) (ethyl xanthate and Cu²⁺) system. The flotation test results demonstrated that IDS can effectively separate sphalerite and pyrite under low alkaline conditions. Furthermore, high-quality zinc concentrates with a Zn grade of 58.48% and a recovery of 91.24% through mixed mineral flotation were obtained. The fundamental mechanisms were investigated through surface wettability tests, adsorption capacity tests, LEIS, FTIR, and XPS. The results confirmed that IDS prevents the adsorption of EX on the surface of pyrite, thereby reducing the response and reactivity of pyrite. The introduction of IDS causes the detachment of Cu²⁺ from the Cu-activated pyrite surface. This process allowed IDS to chelate with the Fe sites on the surface of pyrite through the —COO— and N-centered active groups. By contrast, IDS exhibits weaker adhesion on the surface of Cu-activated sphalerite, making it easily displaced by EX through competitive adsorption.

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EX−Cu（II）体系中亲铁抑制剂对闪锌矿和黄铁矿精确分离的界面吸附和反应性

以亚氨基二磺酸四钠（IDS）为抑制剂，在EX−Cu(II)（乙基黄药- Cu2+）体系中分离闪锌矿和黄铁矿。浮选试验结果表明，IDS在低碱性条件下可有效分离闪锌矿和黄铁矿。通过混合矿物浮选，可获得锌品位为58.48%、回收率为91.24%的优质锌精矿。通过表面润湿性测试、吸附量测试、LEIS、FTIR和XPS研究了其基本机理。结果证实，IDS阻止了EX在黄铁矿表面的吸附，从而降低了黄铁矿的响应性和反应活性。IDS的引入导致Cu2+从cu活化的黄铁矿表面脱离。该过程允许IDS通过- coo -和n中心的活性基团与黄铁矿表面的Fe位点进行螯合。相比之下，IDS在cu活化闪锌矿表面的附着力较弱，容易被EX通过竞争吸附取代。

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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.