硫化矿浮选电化学

章节摘录

插图：Despite the conflicting evidence，Heyes and Trahar（1984）believe there iSSufncient evidence to connrrn the presence of sulphur on mineral surface.Theyleached the surface of tipated pyrrhotite from a typical test with cyclohexane andhave examined the leach solution in a UV spectrophotometer.They found thatSUlphur could be extracted from the surface of pyrrhotite，which had been tipatedin the absence of collector.As can be seen from Fig.2.26 the spectrum from the1eached pyrrhotite was compared with the spectrum of sulphur dissolved incyclohexane indicating that sulphur was present at the surface.Kelebek andSmith（1989）used UV spectrophotometer to determine sulphur in the ethanolex仕act from the surface of floated galena and chalcopyrite showing that theamount of sulphur on the minerals can be correlated with their flotation ratewhich was found to be first order within the critical surface tension range.The correlation between the amount of extracted sulphur and floatability wasfurther investigated.Figure.2.27 represents the relationship between the recoveryof marmatite.

内容概要

Yuehua Hu Born in 1962, graduated from Central South University (CSU, the former Central South Institute of Mining and Metallurgy) in 1982, got the doctor degree in 1989, and elected as professor in 1991. His professional researches are related with the structure-property of flotation reagents and molecular design, the electrochemistry of flotation of sulphide minerals, the solution chemistry of flotation, the interracial interaction and fine particle flotation. Hu has acquired the better achievement in above fields and has got many too honors, including 1st or 2nd class National Science & Technology Advancement Award, China Book Award, Chinese Youth Award of Science and Technology, National Scientific Award for Outstanding Youth etc. More than 200 papers had been published in China or foreign countries.Hu was honored as Cheung Kong Scholar of the Ministry of Education, elected as vice-chairman of Mineral Processing Committee of China Nonferrous Metals Society, engaged as the adjunct professor of metallurgical department of University of Utah.

书籍目录

Chapter 1 General Review of Electrochemistry of Flotation of Sulphide Minerals1.1 Three Periods of Flotation of Sulphide Minerals1.2 Natural Floatability and Collectorless Flotation of Sulphide Minerals1.3 Role of Oxygen and Oxidation of Sulphide Minerals in Flotation1.4 Interactions between Collector and Sulphide Minerals and Mixed Potential Model1.5 Effect of Semiconductor Property of Sulphide Mineral on Its Electrochemical Behavior1.6 Electrochemical Behaviors in Grinding System1.7 The Purpose of This BookChapter 2 Natural Floatability and Collectorless Flotation of Sulphide Minerals2.1 Crystal Structure and Natural Floatability2.2 Collectorless Flotation2.2.1 Effect of Pulp Potential on Flotation at Certain pH2.2.2 Pulp Potential and pH Dependence of Collectorless Floatability2.3 Electrochemical Equilibriums of the Surface Oxidation and Flotation of Sulphide Minerals2.3.1 The Surface Oxidation of Sulphide Minerals and Nernst Equation2.3.2 Electrochemical Equilibriums in Collectorless Flotation2.3.3 Eh-pH Diagrams of Potential and pH Dependence of Flotation2.4 Electrochemical Determination of Surface Oxidation Products of Sulphide Minerals2.5 Surface Analysis of Oxidation of Sulphide MineralsChapter 3 Collectorless Flotation in the Presence of Sodium Sulphide3.1 Description of Behavior3.2 Nature of Hydrophobic Entity3.3 Surface Analysis and Sulphur-Extract3.4 Comparison between Self-Induced and Sodium Sulphide-Induced Collectorless FlotationChapter 4 Collector Flotation of Sulphide Minerals4.1 Pulp Potential Dependence of Collector Flotation and Hydrophobic Entity4.1.1 Copper Sulphide Minerals4.1.2 Lead Sulphide Minerals4.1.3 Zinc Sulphide Minerals4.1.4 Iron Sulphide Minerals4.2 Eh-pH Diagrams for the Collector/Water/Mineral System4.2.1 Butyl Xanthate/Water System4.2.2 Chalcocite-Oxygen-Xanthate System4.3 Surface Analysis4.3.1 UV Analysis of Collector Adsorption on Sulphide Minerals4.3.2 FTIR Analysis of Adsorption of Thio-Collectors on Sulphide Minerals4.3.3 XPS Analysis of Collector Adsorption on Sulphide Minerals Chapter 5 Roles of Depressants in Flotation of Sulphide Minerals5.1 Electrochemical Depression by Hydroxyl Ion5.1.1 Depression of Galena and Pyrite5.1.2 Depression of Jamesonite and Pyrrhotite5.1.3 Interfacial Structure of Mineral/Solution in Different pH Modifier Solution5.2 Depression by Hydrosulphide Ion5.3 Electrochemical Depression by Cyanide5.4 Depression by Hydrogen Peroxide5.5 Depression of Marmatite and Pyrrhotite by Thio-Organic Depressants5.6 Role of Polyhydroxyl and Poly Carboxylic Xanthate in the Flotation of Zinc-Iron Sulphide5.6.1 Flotation Behavior of Zinc-Iron Sulphide with Polyhydroxyl and Polycarboxylic Xanthate as Depressants5.6.2 Effect of Pulp Potential on the Flotation of Zinc-Iron Sulphide in the Presence of the Depressant5.6.3 Adsorption of Polyhydroxyl and Polycarboxylic Xanthate on Zinc-Iron Sulphide5.6.4 Effect of Polyhydroxyl and Polycarboxylic Xanthate on the Zeta Potential of Zinc-Iron Sulphide MineralsChapter 6 Electrochemistry of Activation Flotation of Sulphide MineralsChapter 7 Corrosive Electrochemistry of Oxidation-Reduction of Sulphide MineralsChapter 8 Mechano-Electrochemical Behavior of Flotation of Sulphide MineralsChapter 9 Molecular Orbital and Energy Band Theory Approach of Electrochemical Flotation of Sulphide MineralsChapter 10 Electrochemical Flotation Separation of Sulphide MineralsReferencesIndex of TermsIndex of Scholars

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《硫化矿浮选电化学》适合从事表面化学、电化学和矿物加工基础研究和应用技术研究的高校师生、科研人员和工程技术人员阅读参考。

作者简介

《硫化矿浮选电化学》系统地总结了作者及其研究团队近年来在硫化矿浮选领域的研究工作。作者采用不同电化学研究方法，包括腐蚀电化学研究方法，浮选电化学热力学平衡计算，表面分析技术，半导体能带理论，特别是分子轨道理论，针对硫化矿浮选过程中的电化学现象进行了详细的研究，《硫化矿浮选电化学》就是对这些工作的总结和提炼。《硫化矿浮选电化学》的研究内容涵盖了不同浮选体系中硫化矿的无捕收剂浮选行为和捕收剂诱导浮选行为，其中有关硫化矿浮选的腐蚀电化学、机械电化学以及分子轨道理论研究是硫化矿浮选电化学领域全新的研究内容，将有助于读者更为全面、深入地理解硫化矿浮选的原理和流程。《硫化矿浮选电化学》中列出的有关硫化矿浮选电化学应用的实例表明，浮选电化学具有非常广阔的应用前景。

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