“曾青得铁则化为铜”辨异

人民教育出版社化学室编著的1994年新版初中化学第120页上,对现代湿法冶金技术的先驱—“胆水浸铜”作了简要介绍：早在西汉时期,我国劳动人民就已发现铁能从某些含铜化合物的溶液中置换出铜。     

硫化矿机械活化机理研究现状与展望

随着矿产资源的日趋贫乏,迫切需要新工艺强化难处理多金属复杂矿的湿法冶金过程.而机械活化作为强化湿法冶金过程的常用方法,可有效地强化大多数难浸硫化矿的湿法冶金工艺,而对少数难浸硫化矿湿法冶金过程的强化效果不明显.因此,有必要探索不同硫化矿的机械活化机理和机械活化效果的基础理论问题,推动湿法冶金理论向可预见性和实用性方向发展.本文在综述国内外学者对固体机械化学理论研究的基础上,结合作者已有的研究工作,系统地综述了硫化矿机械活化机理的研究现状,并对今后的研究工作进行了展望.     

高温电位-pH图及其应用实例

电位-pH 图可应用于腐蚀和防腐的研究,对分析化学、化学电源和湿法冶金等也是有用的工具。在湿法冶金过程中,虽然热力学远不如动力学研究那样重要,但它是动力学研究的前提。因此,25℃的电位-pH 图早已在湿法冶金中得到应用。近年来,湿法冶金中采用压热法,提高了温度,使反应速度加快好多倍。如若用电位-pH 图对高温反应进行热力学研     

第四次全国稀土化学和湿法冶金学术报告会在上海召开

中国稀土学会稀土化学和湿法冶金专业委员会主办的第四次全国稀土化学和湿法冶金学术报告会于1984年11月20～24日在上海召开。来自全国27个单位的118名代表出席了会议。会议共收到论文99篇,其中稀土湿法冶金34篇,稀土化学15篇,稀土络合物化学50篇。自第三次学术会议以来,我国稀土化学和湿法冶金的研究又取得了新的进展:P507、伯胺萃取新工艺及其机理的研究;离子型矿、磷钇矿和独     

中国稀土学会第五次湿法冶金学术会议在湖南大庸召开

中国稀士学会稀土化学和湿法冶金专业委员会第五次学术会议于一九九二年十一月二日至七日在湖南省大庸市召开。会议共录用了有关稀土分离方面的学术论文24篇。国内从事稀土湿法冶金研究的主要大专院校、科研院所和十多家厂矿企业的50余人参加了会议。会议由中科院学部委员、中国稀土学会副理事长、稀土化学和湿法冶金专业委员会主任倪     

第九届全国稀土化学与湿法冶金学术会议在广州召开

为全面了解我国稀土化学与湿法冶金的研究现状，交流总结各地学者的最新成果，把握该领域的国际发展水平和发展趋势，中国稀土学会稀土化学与湿法冶金专业委员会于2005年12月2日～4日，在广东省广州市召开了第九届全国稀土化学与湿法冶金学术会议。本次会议由中国稀土学会主办，北京大学稀土材料化学及应用国家重点实验室和稀土材料国家工程研究中心协办，中山大学和广东珠江稀土有限公司承办。     

巯基棉分离-氢化物原子吸收法测定海绵铅及冶金产品中微量铋

试验了HNO_3溶液中巯基棉吸附Bi的条件。拟定了在2—8％HNO_3介质中吸附Bi并分离Cu、Pb,10％HBr~-1％硫脲混合液洗脱,氢化物发生原子吸收法测定Bi。本法可用于海绵铅及湿法冶金过程的铅、铜试料中微量铋的测定,Bi可富集10倍以上,标准加料回收率达98％,相对标准偏差约3％。     

湿法电解含金萃取有机相制备金的研究

提出了一种在湿法冶金同时电解载金属有机相制备金属的新方法.并通过电解磷酸三丁酯(TBP)萃取Au(CN)₂^--R₄N⁺的载金有机相制金.考察了电解技术条件、Au浓度、电解质浓度及还原剂等因素对Au回收率的影响.结果表明,此方法不仅可省去冗长的反萃和还原等步骤,而且可以直接以高回收率制备高纯度的金箔;在电解液中加入少量还原剂可明显提高金的回收率.该法也适用于制备银和铜,制备银时所用体系与金相似,但制备铜则在D₂EHPA-正庚烷为载铜有机相及电解质的酸性溶液为水相的体系中进行.     

金湿法冶金工艺中的分析方法

本文综述了1980至1987年的41篇文献,介绍了在金湿法冶金工艺中测定金、氰和硫脲的方法。     

乙酰丙酮缩邻氨基苯酚对铜的萃取性能及萃取光度法

乙酰丙酮缩邻氨基苯酚对铜的萃取性能及萃取光度法＊唐丽素刘春元龙云飞周建军（湘潭师范学院化学系湖南湘潭４１１１００）关键词乙酰丙酮缩邻氨基苯酚铜（Ⅱ）萃取分光光度法中图分类号Ｏ６５７．３２对铜的萃取分离已做了大量的研究工作，并在湿法冶金工业获得了应用［...     

The Reductive Leaching of Chalcopyrite by Chromium(II) Chloride for the Rapid and Complete Extraction of Copper

A hydrometallurgical process is developed to lower the costs of copper production and thereby sustain the use of copper throughout the global transition to renewable energy technologies. The unique feature of the hydrometallurgical process is the reductive treatment of chalcopyrite, which is in contrast to the oxidative treatment more commonly pursued in the literature. Chalcopyrite reduction by chromium(II) ion is described for the first time and superior kinetics are shown. At high concentrate loadings of 39, 78, and 117 g L⁻¹, chalcopyrite reacted completely within minutes at room temperature and pressure. The XRD, SEM-EDS, and XPS measurements indicate that chalcopyrite reacts to form copper(I) chloride (CuCl). After the reductive treatment, the mineral products are leached by iron(III) sulfate to demonstrate the complete extraction of copper. The chromium(II) ion may be regenerated by an electrolysis unit inspired by an iron chromium flow battery in a practical industrial process.     

Ion Exchange in Hydrometallurgical Processing: An Overview and Selected Applications

Ion exchange has traditionally been employed for the purification of water and the removal of metal contaminants from dilute waste streams. More recently, its use in removing trace metallic impurities from hydrometallurgical process streams (with typical background metal concentrations of 50–100 g/L) has increased substantially. It is also used as a primary recovery and concentration unit operation for certain commodities, where both technical and cost advantages become apparent for complex flow sheets. This overview discusses selected modern applications of ion exchange in hydrometallurgical processes for uranium, precious metals, copper, cobalt, nickel and zinc, and identifies some opportunities for the future.     

Combined standardless electrochemical method for determination of lead(II), copper(II), and cadmium(II) in aqueous solutions

A combined standardless method (no calibration of the device against standard solutions or use of the method of additives is required) for determination of lead, copper, and cadmium in aqueous solutions is suggested. The method operates on principles of inversion voltammetry and potentiostatic coulometry. It is convenient for automated analysis of technological solutions and wastewater from electroplating and hydrometallurgical shops.     

稀土湿法冶金工业中的化工问题

本文简略介绍了我国稀土湿法冶金工业中的一些化工问题,具体分析了解决问题的可能途径。提出了对革新现有的稀土生产流程应进行的基础和应用研究的几点看法。     

Quantifying indium with ion chromatography in hydro‐ and biohydrometallurgical leaching solutions

A methodology has been developed to chromatographically quantify indium in polymetallic (bio)hydrometallurgical processing solutions using the Dionex IonPac CS5A column and pyridine‐2,6‐dicarboxylic acid eluent. Cu(II) and In(III) could be separated by elevating the column temperature to 45°C. The comparatively low stability constant of the In‐eluent complex (log K₂ = 3.8) required typical leaching samples to be diluted in the eluent rather than acid or water to overcome ligand competition between components of the sample solution and the eluent. The methodology was applied to leachates from (bio)hydrometallurgical processing of oxidic flue dust residues and sulfidic zinc ores, where both are promising candidates for the recovery of indium from low grade ores and metallurgical wastes. Indium, ferrous iron, ferric iron, copper, zinc, nickel, and manganese concentrations could be simultaneously quantified. The method was found suitable for samples containing at least 0.25 mg/L indium and an iron to indium ratio of up to 100:1.     

Towards an understanding of solvent extraction--electroanalytical characterization of chloride-leaching solutions

Solvent extraction has been employed to purify media simulating chloride-leaching solutions resulting from complex sulfide concentrate processing, and cyclic voltammetry (CV) has been chosen to characterize those hydrometallurgical aqueous phases. The possibilities of the CV technique were investigated by the evaluation of the adequacy of a specific organic extractant, triisobutylphosphine sulfide, aimed to efficiently and selectively extract silver from a complex chloride medium, additionally containing tenfold to 40-fold molar concentrations of iron, copper and lead. The influence of the oxidation state of the metallic ions present in the feed solution, namely Cu(II) and Cu(I), is considered. The possibilities of CV analysis for the characterization of stripping solutions are also illustrated.     

Towards an understanding of solvent extraction – electroanalytical characterization of chloride-leaching solutions

Solvent extraction has been employed to purify media simulating chloride-leaching solutions resulting from complex sulfide concentrate processing, and cyclic voltammetry (CV) has been chosen to characterize those hydrometallurgical aqueous phases. The possibilities of the CV technique were investigated by the evaluation of the adequacy of a specific organic extractant, triisobutylphosphine sulfide, aimed to efficiently and selectively extract silver from a complex chloride medium, additionally containing tenfold to 40-fold molar concentrations of iron, copper and lead. The influence of the oxidation state of the metallic ions present in the feed solution, namely Cu(II) and Cu(I), is considered. The possibilities of CV analysis for the characterization of stripping solutions are also illustrated.     

Trace Amounts of Aqueous Copper(II) Chloride Complexes in Hypersaline Solutions: Spectrophotometric and Thermodynamic Studies

Knowledge of the thermodynamic properties of aqueous copper(II) chloride complexes is important for understanding and quantitatively modeling trace copper behavior in hydrometallurgical extraction processing. In this paper, UV–Vis spectra data of Cu(II) chloride solutions with various salinities (NaCl, 0–5.57 mol·kg^?1) are collected at 25 °C. The concentration distribution of Cu–Cl species is in good agreement with those calculated by a reaction model (RM). The simple hydrated ion, Cu²⁺, is dominant at low concentration, whereas [CuCl]⁺, [CuCl₂]⁰ and [CuCl₃]^? become increasingly important as the chloride concentration rises. Moreover, the RM calculation suggests the present of a small amount of [CuCl₄]^2?. The de-convoluted molar spectrum of each species is in excellent agreement with our previous theoretical results predicted by time-dependent density functional theory treatment of aqueous Cu-containing systems. The formation constants for these copper chloride complexes have been reported and are to be preferred, except log₁₀ K ₂ ([CuCl₂]⁰).     

Influence of troilite on the decomposition of ammonium jarosite and estimated activation energy

Journal of Thermal Analysis and Calorimetry - Jarosite method is most widely employed to remove iron through the zinc hydrometallurgical process, and ammonium jarosite sediment is produced. The...     

UV–Vis spectroscopy with chemometric data treatment: an option for on-line control in nuclear industry

Chemometrics can be very useful for the classical field of UV–Vis determination of metals in aqueous solutions. A conventional approach consisting of using selective bands in a univariate mode is often not applicable to the real-world samples from e.g. hydrometallurgical processes, because of overlapping signals, light scattering on foreign particles, gas bubble formation, etc. And this is where chemometrics can do a good job. This paper overviews certain contributions to the field of multivariate data processing of UV–Vis spectra for seemingly simple case of metal detection in aqueous solutions. Special attention is given to applications in nuclear technology field.