Application and electrochemical depression mechanism of sodium sulfite on the flotation separation of galena–pyrite mixed concentrate in Yiliang typical high‑sulfur lead–zinc deposit

IF 2.6 3区地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS

Chemie Der Erde-Geochemistry Pub Date : 2024-11-20 DOI:10.1016/j.chemer.2024.126219

Zhicheng Liu , Fen Jiao , Yanfang Cui , Xiang Lin , Wenqing Qin , Qian Wei

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引用次数: 0

Abstract

The high content of pyrite in high‑sulfur lead–zinc sulfide resources affects the electrochemical properties and floatability of galena and sphalerite, which results in difficult flotation separation. In this study, the negative effects of a high-alkaline process were weakened by introducing an efficient mixed depressant CaO + Na₂SO₃ in selective flotation separation of galena from pyrite. Flotation separation tests of real ore samples showed that the mixed depressant was more efficient than single CaO (5000 g/t), and the best process conditions of Pb grade 64.01 % and Pb recovery 88.45 % were obtained. The effects of Na₂SO₃ on the electrochemical interaction between the two minerals were studied by micro-flotation tests, electrochemical, ion dissolution, UV–Vis measurements, zeta potential measurements, and X-ray photoelectron spectroscopy (XPS) detections. Results indicated that Na₂SO₃ could weaken the galvanic interaction between galena–pyrite and reduce the Pb²⁺ dissolution from the galena surface. Na₂SO₃ could desorb the collector ethyl xanthate pre-adsorbed on the pyrite surface.

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亚硫酸钠在义良典型高硫铅锌矿浮选分离方铅铁矿混合精矿中的应用及电化学抑制机理

高硫铅锌硫化物资源中黄铁矿含量高，影响方铅矿和闪锌矿的电化学性能和可浮性，导致浮选分离困难。本研究通过引入高效混合抑制剂CaO + Na2SO3，减弱了高碱性工艺对方铅矿与黄铁矿选择性浮选分离的负面影响。实际矿样浮选分离试验表明，混合抑制剂效果优于单一氧化钙（5000 g/t），获得了Pb品位64.01%、Pb回收率88.45%的最佳工艺条件。通过微浮选、电化学、离子溶解、UV-Vis测定、zeta电位测定和x射线光电子能谱（XPS）检测，研究了Na2SO3对两种矿物电化学相互作用的影响。结果表明，Na2SO3可以减弱方铅矿与黄铁矿之间的电相互作用，减少方铅矿表面Pb2+的溶解。Na2SO3可以解吸预吸附在黄铁矿表面的捕收剂乙基黄药。

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来源期刊

Chemie Der Erde-Geochemistry 地学-地球化学与地球物理

CiteScore

7.10

自引率

0.00%

发文量

审稿时长

3.0 months

期刊介绍： GEOCHEMISTRY was founded as Chemie der Erde 1914 in Jena, and, hence, is one of the oldest journals for geochemistry-related topics. GEOCHEMISTRY (formerly Chemie der Erde / Geochemistry) publishes original research papers, short communications, reviews of selected topics, and high-class invited review articles addressed at broad geosciences audience. Publications dealing with interdisciplinary questions are particularly welcome. Young scientists are especially encouraged to submit their work. Contributions will be published exclusively in English. The journal, through very personalized consultation and its worldwide distribution, offers entry into the world of international scientific communication, and promotes interdisciplinary discussion on chemical problems in a broad spectrum of geosciences. The following topics are covered by the expertise of the members of the editorial board (see below): -cosmochemistry, meteoritics- igneous, metamorphic, and sedimentary petrology- volcanology- low & high temperature geochemistry- experimental - theoretical - field related studies- mineralogy - crystallography- environmental geosciences- archaeometry