Investigation of pullulan polysaccharide as a sphalerite depressant for chalcopyrite separation: Flotation behavior and interfacial adsorption mechanism

IF 4.2 2区 工程技术 Q2 ENGINEERING, CHEMICAL Advanced Powder Technology Pub Date : 2024-08-21 DOI:10.1016/j.apt.2024.104621
Qilin Zhai, Yuwei Hu, Runqing Liu, Wei Sun
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Abstract

The remarkable differences in the metallurgical processes of copper and zinc require their host minerals to be separated as far as possible during beneficiation. For chalcopyrite and sphalerite, the primary host minerals of copper and zinc, their green and efficient separation in the beneficiation stage remains a great challenge. This work is the first to employ environmentally friendly pullulan polysaccharide (PP) as a sphalerite depressant to assist in the concentration of chalcopyrite. Flotation experiments have revealed that PP possesses a selective depression action on sphalerite without having a large influence on the recovery of chalcopyrite. Characterization analysis has revealed that PP can be adsorbed onto chalcopyrite and sphalerite surfaces, but with a different response to subsequent sorption collectors. PP adsorbs to the Zn atoms on sphalerite surfaces via its O atoms in the C−O−H group and thus prevents the adsorption of sodium butyl xanthate (BX). The Fe sites on the chalcopyrite surface can adsorb PP, but this process does not affect the BX adsorption as the Cu sites remain exposed. Hence, PP can enhance the hydrophilicity of sphalerite without interfering with the hydrophobicity of chalcopyrite, resulting in a desirable separation effect. Overall, this work offers a promising scheme for the concentration of chalcopyrite from sphalerite during beneficiation, thereby contributing to the efficient exploitation of copper and zinc resources.

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研究作为闪锌矿抑制剂用于黄铜矿分离的乌拉坦多糖:浮选行为和界面吸附机制
铜和锌在冶金过程中的显著差异要求在选矿过程中尽可能分离它们的主矿物。对于铜和锌的主要主矿物黄铜矿和闪锌矿来说,在选矿阶段对它们进行绿色、高效的分离仍然是一个巨大的挑战。这项研究首次采用环境友好型拉氏多糖(PP)作为闪锌矿抑制剂,以帮助黄铜矿的选矿。浮选实验表明,PP 对闪锌矿具有选择性抑制作用,但对黄铜矿的回收率影响不大。特征分析表明,聚丙烯可以吸附在黄铜矿和闪锌矿表面,但对后续吸附收集器的反应不同。聚丙烯通过其 C-O-H 基团中的 O 原子吸附到闪锌矿表面的 Zn 原子上,从而阻止了黄原酸丁酯钠(BX)的吸附。黄铜矿表面的铁位点可以吸附 PP,但这一过程不会影响对 BX 的吸附,因为铜位点仍然暴露在外。因此,PP 可以增强闪锌矿的亲水性,而不会影响黄铜矿的疏水性,从而产生理想的分离效果。总之,这项工作为在选矿过程中从闪锌矿中浓缩黄铜矿提供了一个前景广阔的方案,从而有助于铜锌资源的有效开发。
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来源期刊
Advanced Powder Technology
Advanced Powder Technology 工程技术-工程:化工
CiteScore
9.50
自引率
7.70%
发文量
424
审稿时长
55 days
期刊介绍: The aim of Advanced Powder Technology is to meet the demand for an international journal that integrates all aspects of science and technology research on powder and particulate materials. The journal fulfills this purpose by publishing original research papers, rapid communications, reviews, and translated articles by prominent researchers worldwide. The editorial work of Advanced Powder Technology, which was founded as the International Journal of the Society of Powder Technology, Japan, is now shared by distinguished board members, who operate in a unique framework designed to respond to the increasing global demand for articles on not only powder and particles, but also on various materials produced from them. Advanced Powder Technology covers various areas, but a discussion of powder and particles is required in articles. Topics include: Production of powder and particulate materials in gases and liquids(nanoparticles, fine ceramics, pharmaceuticals, novel functional materials, etc.); Aerosol and colloidal processing; Powder and particle characterization; Dynamics and phenomena; Calculation and simulation (CFD, DEM, Monte Carlo method, population balance, etc.); Measurement and control of powder processes; Particle modification; Comminution; Powder handling and operations (storage, transport, granulation, separation, fluidization, etc.)
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