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投稿时间：2024-08-04 修订日期：2024-10-03
投稿时间：2024-08-04 修订日期：2024-10-03
中文摘要: 摘 要: 抑制剂是白钨矿-方解石矿物浮选分离中必不可少的添加剂。然而传统的无机抑制剂如水玻璃具有用量大、污染环境、低效等缺点，使得人们越来越关注环保、高效的有机抑制剂。为此，本研究选取了绿色无毒且易降解的有机物木质素磺酸钠为抑制剂，以油酸钠（NaOL）为捕收剂，通过浮选试验、Zeta电位测试、傅里叶变换红外光谱（FTIR）测试以及X射线光电子能谱（XPS）分析等手段研究了木质素磺酸钠对白钨矿、方解石浮选行为的影响，并结合表征结果分析了木质素磺酸钠在方解石和白钨矿表面的吸附机理。纯矿物浮选试验研究表明，在自然pH条件下，当NaOL为5.0×10-5 mol/L、木质素磺酸钠为100 mg/L时，白钨矿与方解石的回收率之差可达60%以上，表明木质素磺酸钠能够选择性地抑制方解石的浮选，而对白钨矿的浮选基本无影响。吸附量测试和Zeta电位结果表明，木质素磺酸钠能大量吸附在方解石表面，阻碍后续油酸钠的吸附；相比之下，木质素磺酸钠在白钨矿表面吸附较少，油酸钠仍能大量吸附在白钨矿表面。FTIR和XPS分析表明方解石表面的Ca2+与木质素磺酸钠中的-SO3-、-OH等基团发生强烈化学作用，而与白钨矿表面的Ca2+作用较弱。木质素磺酸钠作为一种易溶于水、化学选择性强、安全环保的方解石抑制剂，对于实现白钨矿与方解石的高效选择性浮选分离具有重要意义，可为白钨矿与方解石的浮选分离提供理论指导。
关键词: 木质素磺酸钠；浮选；抑制剂；方解石；白钨矿
Abstract:Abstract: Inhibitors are indispensable additives in the flotation separation of scheelite-calcite minerals. However, traditional inorganic inhibitors such as water glass have the disadvantages of high dosage, environmental pollution, and low efficiency, which has led to increasing attention being paid to environmentally friendly and efficient organic inhibitors. Therefore, this study selected the green, non-toxic, and biodegradable organic compound lignosulfonate sodium as an inhibitor, and sodium oleate (NaOL) as a collector, to investigate the impact of lignosulfonate sodium on the flotation behavior of scheelite and calcite through flotation tests, Zeta potential measurements, Fourier Transform Infrared Spectroscopy (FTIR) testing, and X-ray Photoelectron Spectroscopy (XPS) analysis. The results of pure mineral flotation tests show that under natural pH conditions, when the concentration of NaOL is 5.0×10-5 mol/L and lignosulfonate sodium is 100 mg/L, the difference in recovery rates between scheelite and calcite can reach over 60%. This indicates that lignosulfonate sodium can selectively inhibit the flotation of calcite while having minimal impact on the flotation of scheelite. Adsorption tests and zeta potential results indicate that lignosulfonate sodium can adsorb significantly on the surface of calcite, hindering the subsequent adsorption of sodium oleate; in contrast, lignosulfonate sodium adsorbs less on the surface of scheelite, allowing sodium oleate to still adsorb extensively on the surface of scheelite. FTIR and XPS analyses suggest that the Ca2+ on the surface of calcite has a strong chemical interaction with the -SO3- and -OH groups in lignosulfonate sodium, while its interaction with the Ca2+ on the surface of scheelite is weaker. Lignosulfonate sodium, as a water-soluble inhibitor with strong chemical selectivity and environmental safety, is of great significance for the efficient and selective flotation separation of scheelite and calcite. It can provide theoretical guidance for the flotation separation of scheelite and calcite.
Keywords: Lignosulfonate sodium; Flotation; Inhibitor; Calcite; Scheelite
keywords: Lignosulfonate sodium Flotation Inhibitor Calcite Scheelite
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基金项目:国家重点研发计划课题（2022YFC2905103-02）；武汉市科技局知识创新项目（2023020201020411）；武汉科技大学创新训练项目（23Z132）；武汉科技大学“十四五”湖北省优势特色学科（群）项目（2023A0401）
引用文本：
李佳颖,姚伟,李茂林,徐寒冰,宁江峰,崔瑞,付莹颖,林少勇,冷炳.木质素磺酸钠对白钨矿和方解石浮选行为的影响及其作用机理[J].有色金属（选矿部分）,2024(12):128-138.
LI Jiaying,YAO Wei,LI Maolin,XU Hanbing,NI Jiangfeng,CUI Rui,FU Yingying,LIN Shaoyong,LENG Bing.Effect of Sodium Lignosulfonate on Flotation Separation of Scheelite and Calcite and Its Action Mechanism[J].Nonferrous Metals(Mineral Processing Section),2024(12):128-138.
李佳颖,姚伟,李茂林,徐寒冰,宁江峰,崔瑞,付莹颖,林少勇,冷炳.木质素磺酸钠对白钨矿和方解石浮选行为的影响及其作用机理[J].有色金属（选矿部分）,2024(12):128-138.
LI Jiaying,YAO Wei,LI Maolin,XU Hanbing,NI Jiangfeng,CUI Rui,FU Yingying,LIN Shaoyong,LENG Bing.Effect of Sodium Lignosulfonate on Flotation Separation of Scheelite and Calcite and Its Action Mechanism[J].Nonferrous Metals(Mineral Processing Section),2024(12):128-138.
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