硫化矿浮选过程中的电化学行为研究现状

介绍了硫化矿电化学浮选行为原理、研究现状、应用以及存在的问题和发展前景。     

硫化矿浮选过程中的电化学行为研究现状

介绍了硫化矿电化学浮选行为原理、研究现状、应用以及存在的问题和发展前景。     

复杂多金属硫化矿浮选新技术研究现状

介绍了复杂多金属硫化矿浮选新技术研究现状,并对电化学浮选、细粒浮选、磁力浮选、生物浮选等新工艺和新技术进行了讨论和分析,指出开发高效浮选新技术仍是多金属共生硫化矿选矿研究的重点和发展方向。     

复杂多金属硫化矿浮选新技术研究现状

介绍了复杂多金属硫化矿浮选新技术的研究现状,并对电化学浮选、细粒浮选、磁力浮选、生物浮选等新工艺和新技术进行了讨论和分析,指出开发高效浮选新技术仍是多金属共生硫化矿选矿研究的重点和发展方向。     

复杂多金属硫化矿浮选新技术研究现状

介绍了复杂多金属硫化矿浮选新技术的研究现状,并对电化学浮选、细粒浮选、磁力浮选、生物浮选等新工艺和新技术进行了讨论和分析,指出开发高效浮选新技术仍是多金属共生硫化矿选矿研究的重点和发展方向。     

硫化矿石自燃机理及防治技术研究进展

根据国内外有关硫化矿石自燃的研究现状,系统阐述了硫化矿石氧化自热的物理机理、化学热力学机理、电化学机理以及生物氧化机理。介绍了硫化矿石自燃火灾的预测预报技术,包括自燃倾向性测试法、综合因素评价法、统计经验法、数学模型预测法、标志性气体分析法和测温预报法。综述了现有的硫化矿石自燃综合治理技术。最后针对硫化矿石自燃的机理及综合防治技术研究做出了展望。     

硫化矿物浮选电化学——第四章 硫化矿物浮选研究中的电化学方法

<正> 从第二、三章的讨论中可以发现,电化学性质是硫化矿物浮选体系的基本性质,因此,电化学方法就成了硫化矿物浮选理论研究的基本手段。有关电化学的理论及实验技术已有许多专门著作。本章将简要介绍一些电化学的基本知识和一部分已用在硫化矿物浮选理论研究中的电化学方法、技术以及它们的具体应用实例。§4-1 电化学基础历史上电化学是从研究电能与化学能的相互转换问题开始的,到现在已有近两百年的历史了。特别是自1950年以来形成了以研     

硫化矿浮选电化学——硫化矿电化学调控浮选及无捕收剂浮选的理论与应用(Ⅰ)总论

硫化矿电化学调控浮选是近年来才发展的新技术,为更有效地处理复杂硫化矿石提供了可能的途径。本文系统地介绍并评述电化学调控下的捕收剂浮选和无捕收剂浮选的研究成果,包括矿物疏水和浮选机理、矿浆电位对浮选的影响、浮选抑制的电化学机理以及硫化矿的浮选分离。并指出了电化学调控浮选今后的发展方向。     

硫化矿物浮选电化学

本讲座共分为绪论、硫化矿物浮选体系的基本性质、硫化矿物浮选电化学理论、硫化矿物浮选电化学研究方法及应用、硫化矿物浮选矿浆电化学五章,共约6万字。     

硫化铅锌矿浮选分离技术的研究现状及进展

概述了硫化铅锌矿浮选分离技术的主要研究进展,分析了硫化铅锌矿各种浮选工艺的特点、适用范围及优缺点,从浮选电化学、分子力学和量子化学模拟的角度对硫化铅锌矿浮选分离理论研究进展进行了总结。同时,介绍了硫化铅锌矿捕收剂、铅锌浮选分离无机和有机抑制剂及硫化锌矿浮选活化剂的主要研究进展。在此基础上,展望了提高硫化铅锌矿浮选分离技术水平的主要研究重点和研究方向。     

兰坪氧化铅锌矿石中石膏的发现以及对选矿工艺的影响

兰坪氧化铅锌矿的选矿长久以来是选矿界的难题。在查明该矿石物质组成的基础上,采用多种手段揭示了兰坪氧化铅锌矿中存在可溶性盐石膏,正是由于可溶性盐石膏的存在,致使矿浆中含有大量钙离子,钙离子比铅锌离子的活度更大,故与加入硫化钠中的硫离子优先生成硫化钙,从而致使在氧化锌矿物表面难以生成硫化锌,并消耗大量硫化钠。采取预处理措施将大部分石膏除去后,大大改善了氧化锌矿物的硫化效果,硫化钠用量显著降低。     

巯基乙酸抑制硫化矿物的电化学机理研究

研究了巯基乙酸（TGA）对硫化矿物电极电位和动电位的影响。试验表明巯基乙酸对黄铁矿、方铅矿和黄铜矿有抑制作用,对毒砂和亲锌矿没有抑制作用。电化学测试表明巯基乙酸对表面覆盖有捕收剂膜的硫化矿物动电位影响较小,能够显降低硫化矿物的静电位,它对硫化矿物抑制的电化学机理为当硫化矿物的静电位EMS低于黄药氧化为双黄药的可逆电位EX^-/X2时,硫化矿物表面双黄药不稳定被还原,从而降低了可浮性;反之,双黄药保持稳定,不被抑制。用巯基乙酸实现两种硫化矿物浮选分离的电化学条件为：EMS1＜EX^-X2(EX^-/GPbX2）＜EMS2。     

螯合活化剂对孔雀石的活化及其对氧化铜矿石浮选应用

对采自云南红河、兰坪、东川及湖北大冶铜绿山的四个孔雀石样品,进行了分别使用D2(2、5——二硫酚——1、3、4——硫代二唑)及硫化钠作活化剂,黄药作捕收剂的单矿物浮选试验。研究了不同矿区孔雀石浮选基本行为间的差别、D2药剂作用规律及适用范围。对于以D2作活化剂,用黄药从氧化矿石中直接浮选未经预先硫化的氧化铜矿物新工艺的实践经验及结果也作了报道。     

Improving flotation recovery of copper sulphides by nitrogen gas and sulphidisation conditioning

This paper describes investigations to increase the flotation recovery of copper from ores containing both primary and secondary copper minerals. An increase in the flotation recovery of copper is obtained by conducting controlled potential sulphidisation conditioning in the absence of dissolved oxygen. Sulphidising reagents have been widely employed for the flotation of secondary copper minerals and in the case of molybdenum production the flotation depression of copper sulphides. However, by using nitrogen gas to exclude oxygen and by careful control of the sulphidisation process it has been possible to increase the flotation recovery of chalcocite, chalcopyrite and bornite. The additional recovery is believed to be from particles with oxidised or tarnished surfaces where surface oxidation has been reversed. The use of nitrogen to exclude oxygen increases the efficacy of new sulphide surface formation and improves process efficiencies by maximising the availability of sulphide ions for surface sulphidisation to occur at the lowest sulphide consumption levels.     

铁成分对硫化锌精矿的半导体性质及化学反应性的影响

硫化锌精矿(以下简称精矿)除含有主要元素锌与硫外,还含有其它元素,尤其是含有相当多的铁。在湿法处理精矿时,其铁成分的行为取决于铁的矿物存在形式。精矿中的铁可以铁闪锌矿[(Zn,Fe)S)、黄铁矿、黄铜矿的形式存在。铁闪锌矿的铁含量可在很大的范围内变化,其物理化学性质也随铁含量而变化,因此对精矿的湿法直接处理产生很大的影响。本文研究出一种可靠的、确定精矿矿物组成的化学分析方法,着重于测定铁在精矿各矿物中的分布,及铁闪锌矿铁含量的变化规律。在此基础上,实验研究了精矿中的铁(尤其是铁闪锌矿中的铁)对精矿的半导体性质的影响规律,应用半导体电化学原理讨论了精矿铁含量对精矿的直接浸出(常压、硫酸介质)的影响机理。     

Implementation of regrind–flotation pre-treatment of the CIL feed in a copper–gold plant

A regrind–flotation pre-treatment method developed to improve performance of a CIL circuit at copper–gold concentrators has been implemented at plant scale at the Newcrest Telfer mine. Low gold recovery in the CIL circuit due to the occlusion of gold by iron sulphide gangue minerals was overcome by the fine grinding of the CIL feed. A post-regrind copper flotation stage recovered liberated copper sulphide minerals allowing lower cyanide consumption in the subsequent CIL circuit than by regrinding alone. Gold recoveries achieved during the laboratory development of the regrind–flotation pre-treatment method have been replicated during the commissioning of the full-scale plant.     

Eh—pH图形数据库开发与应用的现状及趋势

总结了Ｅｈ－ｐＨ图形数据库开发方法及应用的现状，探讨了今后研究方向。针对硫化矿浮选实践，提出了Ｅｈ－ｐＨ图形数据库的应用前景。     

The response of sulphide and gangue minerals in selected Merensky ores to increased depressant dosages

Depressants are added to flotation circuits to reduce naturally floatable gangue (NFG) present in ores, but under certain conditions have been shown to affect sulphide mineral recovery, particularly guar reducing the recovery of pyrrhotite. Copper sulphate is added to increase sulphide mineral recovery, but may also activate gangue particularly in the presence of dithiophosphate. This has also been shown to vary with ore type. Previous work has shown the usefulness of analysing reagents holistically, decoupling pulp and froth effects and assessing material recovered by true flotation and that recovered by entrainment separately. This work assesses the effect of copper activation on different ores and the ability of two classes of depressants, guar gum (guar) and carboxymethylcellulose (CMC) to reduce this effect and shows that by a depressant dosage of 300 g/t almost all the NFG had been removed from the concentrate. It also evaluates the effect of depressants on the sulphide minerals and shows that pyrrhotite was most affected.     

Assessment of the floatability of chalcopyrite,molybdenite and pyrite using biosolids and their main components as collectors for greening the froth flotation of copper sulphide ores

Biosolids and representative compounds of their main components – humic acids, sugars, and proteins – have been tested as possible environment-friendly collectors and frothers for the flotation of copper sulphide ores. The floatability of chalcopyrite and molybdenite – both valuable sulphide minerals present in these ores – as well as non-valuable pyrite was assessed through Hallimond tube flotation tests. Humic acids exhibit similar collector ability for chalcopyrite and molybdenite as that of a commercial collector (Aero 6697 promoter). Biosolids show more affinity for pyrite. The copper recovery (85.9%) and copper grade (6.7%) of a rougher concentrate obtained using humic acids as main collector for the flotation of a copper sulphide ore from Chile, were very similar to those of a copper concentrate produced by froth flotation under the same conditions with a xanthate type commercial collector. This new and feasible end-use of biosolids and humic acids should be new environment-friendly organic froth flotation agents for greening the concentration of copper sulphide ore. Now, further research is needed in order to scale current laboratory assays to operational mining scales to determine efficiencies to industrial scale.     

钙镁矿物抑制硫化矿自燃机理的研究

由于钙镁矿物对硫化物的氧化具有明显的抑制作用,因此当硫化矿的顶、底板含有钙镁矿物或与硫化矿伴生,则此类硫化矿不易发生火灾,本文在论述钙镁矿物的阻燃机理的基础上,对钙镁物质抑制硫化矿自然作用做了一系列试验,进一步阐明了钙镁矿物的阻燃作用机理。根据此原理,证明水泥浆具有防灭火作用,可作为硫化矿防灭火材料。