Au-硫代米蚩酮-Triton X-100-辛醇液晶萃取光度法测定地质样品中的金

研究了表面活性剂Triton X-100－辛醇析相法对Au-硫代米Chi酮络合物的萃取行为及机理。该法简便快速，能在常温下析相，络合物的稳定性大大增强，萃取效率高。将该法用于地质样品中痕量金的测定，效果满意。     

Leaching behavior of butanedionedioxime as gold ligand

1　ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｒｅａｒｅｔｗｏｔｙｐｅｓｏｆｏｒｂｉｔａｌｓｉｎｏｕｔｅｒｅｌｅｃｔｒｏｎｏｒｂｉｔａｌｓｏｆｇｏｌｄａｎｄｉｔｓｌｉｘｉｖｉａｎｔｓ[1,2 ] .ＯｎｅｉｓｃａｌｌｅｄＨＯＥＯ(ｈｉｇｈｅｒｏｃｃｕｐｉｅｄｅｌｅｃｔｒｏｎｉｃｏｒｂｉｔａｌｓ) ,ｓｕｃｈａｓπ ｔｙｐｅＨＯＥＯｏｆｂｏｔｈ 5ｄ2(ｘ2 -ｙ2 ) ａｎｄ 5ｄ2ｚｏｆｇｏｌｄ ,ａｎｄσ ｔｙｐｅＨＯＥＯｏｆσ22 ｐｘｏｆｃｙａｎｉｄｅ;ａｎｄａｎｏｔｈｅｒｃａｌｌｅｄＬＵＥＯ(ｌｏｗｅｒｕｎｏｃｃｕｐｉｅｄｅｌｅｃｔ…     

Study on Gold (Ⅰ) Solvent Extraction from Alkaline Cyanide Solution by TBP with Addition of Surfactant

１ＩｎｔｒｏｄｕｃｔｉｏｎＩｎ１９７０′ｓ，ｍａｎｙｒｅｓｅａｒｃｈｅｒｓｂｅｇａｎｓｔｕｄｙｏｎｇｏｌｄ（Ⅰ）ｅｘｔｒａｃｔｉｏｎｆｒｏｍａｌｋａｌｉｎｅｃｙａｎｉｄｅｓｏｌｕｔｉｏｎ［１，２］，ｂｕｔｉｔｗａｓｉｎｔｅｒｕｐｔｅｄｄｕｅｔｏｔｈ...     

CTAB-TBP-Au(CN)_2-萃合物水分子数的测定

添加表面活性剂后,碱性氰化液中的金被高效萃取,水分子在萃合物结构中提供氢键。以十六烷基三甲基溴化铵(CTAB)为表面活性剂,磷酸三丁酯(TBP)为萃取剂的体系具有很好的萃金效率,用~(198)Au示踪活化、微库仑水分测定(卡尔-费休法)和红外光谱法对该体系进行了分析,并用线性拟合的方式研究有机相中水和金的定量关系。结果表明,萃合物中水浓度与金浓度线性相关,摩尔比约为4;红外光谱分析结果显示,有机相中的金、氰根和水的含量有固定比例,萃合物具有稳定的化学组成。     

用硫氰酸钾从季铵盐载金有机相中反萃金的研究

研究了应用硫氰权钾从CTAB-30%TBP（或30%正辛醇）-磺化煤油萃Au(Ⅰ）体系载金有机相的反萃取，以及反萃后的有机相的重复利用等，研究结果表明，应用3mol/LKSCN能够将载金有机相中（浓度为3g/LAu)90%左右的Au反萃入水相，3级反萃率接近100%，有机相经过5次循环利用后，对1g/LAu溶液的萃取率基本无变化，反萃入水相中的Au可能用NaBH4还原回收。     

氨氰浸金原理及研究进展

氨氰浸出技术自从发明以来就被认为是从含铜难处枞金矿资源中恒择性回收金的一种有效方法。系统总结了目前国内外氨氰浸金的研究进展,主要包括氨氰浸金的基本原枞、浸出动力学研究、溶液化学研究、氨氰浸金实验室实验及工业应用研究现状,对氨氰浸金过程中存在的问题及其未来的发展趋势做了评价。     

石硫合剂法浸金的原理、稳定性及应用研究进展

总结了国内外近20年来在石硫合剂法浸金中取得的研究成果,详细讨论了石硫合剂法浸金的基本原理、开放体系中Sx2-及S2O32-的稳定性、添加剂Na2SO3及NaCl的溶金促进机理、Cu2+的催化作用及硫化铜沉淀的生成与返溶规律;列举了石硫合剂法在高硫、高砷、高铅等顽固金矿及废弃线路板中浸金的应用。与其它非氰浸金工艺相比,归纳了石硫合剂法浸金的优点。     

溶剂萃取分离金川料液中的金钯铂

阐述了石油亚砜（ＰＳＯ）选择性萃取分离Ｐｄ的基本原理，并以此为基础研究了用ＤＢＣ萃Ａｕ、ＰＳＯ萃Ｐｄ及Ｎ２３５萃Ｐｔ，从金川蒸馏Ｏｓ、Ｒｕ之后的脱胶液中萃取分离金、钯、铂的工艺过程     

Bioleaching of refractory gold ore （ Ⅲ ）——Fluid leaching Jinya refractory gold concentrate by Thiobacillus ferrooxidans

A novel fluidized-bed reactor was designed and installed for bloleaching in a semi-continuous way, by which a process for biuleaching-cyanidation of Jinya refractory gold arsenical concentrate was studied. The arsenic extraction rate reaches 82.5 % after 4-day batch biooxidation of the concentrate under the optimized condition of pH 2.0, ferric ion concentration 6.Sg/L and pulp concentration 10%. And leached rate of gold in the following cyanida.tion is over 90%. The parameters of three series fluidized-bed reactors exhibit stability during the semi-continuous bioleaching of the concentrate.Armmic in the concentrate can be got rid of 91% after 6-day leaching. Even after 4 days, 82% of arsenic extraction rate was still obtained. The recovery rates of gold are 92 % and 87.5 % respectively in cyaniding the above bioleached residues.The results will provide a base for further commercial production of gold development.     

The use of fibrous ion exchangers in gold hydrometallurgy

This article examines a family of ion-exchange fibers, FIBAN, containing primary and secondary amine groups. These ion exchangers have a fiber diameter of 20–40 Μm, high osmotic and mechanic stability, a high rate of adsorption and regeneration, and excellent dynamic characteristics as filtering media. Inparticular, this article discusses the use of FIBAN fibrous ion exchangers in the recovery of gold cyanide andbase-metal cyanides (copper and mercury) from mineral-leaching solutions. The influence of polymer structure and water content on their extraction ability is described, along with key parameters of gold hydrometallurgy such as extraction efficiency, selectivity, pH dependence, gold cyanide loading, kinetics, and stripping.     

粗铜和粗铅中金银分析取制样方法及标准化

团结取样代表性和试样加工均匀性等问题，研究了粗铅和粗铅中金银分析试样加工粒度对金银品位的影响，产品锭内金银分布及规律，产品锭与小锭金银分布一致性及产品锭小样锭表层金银分布规律。通过在９个企业取制上千个试样，分析处理万余个数据和认真研究，为制定粗铜粗铅中银分析取制样方法提供了科学依据，并纳入粗铜粗铅技术标准。     

Solid-phase extraction gold from alkaline cyanide solution with quaternary ammonium surfactant

The solid-phase extraction(SPE) technique applied to the extraction of organic compound was creatively used as the extraction of inorganic gold in the paper.Two types of techniques were proposed and explored,namely the SPE and the liquid–liquid extraction(LLE) of the quaternary ammonium surfactant [cetytrimethyl ammonium bromide(CTMAB),cetyl pyridine bromide(CPB),benzyl dimethyl dodecyl ammonium chloride(BDMDAC),and dodecyl trimethyl ammonium chloride(DTMAC)].The surfactant could react with Au(CN)_2~-to form the ionic complex,and the compound could be extracted by SPE column of reversed-phase bonded silica gel.Hence,a new method of SPE was proposed to extract gold with these features of the high selectivity,the reliability,and the simplicity.The experimental result shows that the recovery rate of gold is more than 98 %,and the solid-phase extraction column is not easily damaged and it can be repeatedly used.The new method can be used as the extraction process of gold from alkaline cyanide solution as well.Besides,the paper also puts forward a new process of gold extraction.     

Cloud point extraction and flame atomic absorption spectrometry analysis of palladium, platinum, and gold ions from industrial polluted soil

Cloud point extraction (CPE) with Tergitol TMN-6 was applied for the extraction of trace amounts of palladium (Pd(Ⅱ)),platinum (Pt(Ⅳ)),and gold (Au(Ⅲ)) in the soil of industrial sewage.Ammonium pyrolysine dithiocarbamate (APDC) was adopted as the chelating agent prior to CPE and then was detected by atomic absorption spectrometry (AAS).Different parameters such as the concentration of surfactants,chelating agent and salt,sample pH,equilibration temperature and time,centrifugation time and rates,and the effect of foreign ions were studied.Under optimum conditions,the low limits of detections are 1.4,2.8 and 1.2 ng.ml-1 and the enrichment factors are 21,12,and 24 for Pd(Ⅱ),Pt(Ⅳ),and Au(Ⅲ),respectively.The relative standard deviations vary from 0.6％ to 1.0％ (n=11).All correlation coefficients of the calibration curves are ＞0.9960.The proposed method was successfully applied for the determination of Pd(Ⅱ),Pt(Ⅳ),and Au(Ⅲ) in the real soil of industrial sewage samples.     

某微细粒砷黄铁矿包裹金矿的非氰浸出研究

采用非氰浸化剂(石硫合剂)对含金为2.47 g/t的甘肃某微细粒砷黄铁矿包裹金矿进行浸出试验,研究预处理方式和浸出工艺对金浸出率的影响。结果表明,石硫合剂对金的直接搅拌浸出率低于30%,该矿属难浸金矿石;采用边磨边浸-搅拌浸出的方式,浸出率可提升至68.4%;增加碱式预氧化处理,可将金的浸出率进一步提升到80%以上。采用最优的工艺,边磨边碱式预氧化36 h,经石硫合剂搅拌浸出5 h,金的浸出率可达到91.5%。     

应用超声显微镜技术检测饰品镀金层厚度

贵金属饰品市场常出现掺假黄金侵犯消费者权益事件,实验室常用X射线荧光光谱法(XRF)检测饰品元素含量,但此法对于表面覆盖层较厚的样品存在局限性。本文利用超声显微镜对银镀金和铜镀金样品进行测试,得到超声衰减系数与表面镀层厚度间的关系曲线,能够实现对镀层样品厚度的定量分析,在无损前提下得到贵金属样品内部信息,对于未来珠宝检测行业具有重要指导意义。     

CTMAB萃取Au(CN)_2~-体系中几种改性剂的对比

研究了阳离子型表面活性剂改性剂惰性稀释剂Au(CN) -2 萃金体系中各种改性剂对萃取金性能的影响。试验结果表明 :改性剂对萃金的助萃效果与它们的碱性强弱顺序一致 ,即与它们的给电子能力的顺序一致 ,为TAPO >TBP >MIBK >ROH >BIOSO。改性剂的加入避免了体系中第三相的形成 ,使得Au(CN) -2 萃入有机相     

用N503/TBP从碱性氰化液中萃取低浓度金

研究酰胺N503和TBP从碱性氰化液中萃取低浓度Au(Ⅰ),考察N503体积浓度、水相pH值、TBP浓度、NaCl浓度、改性剂种类和相比等因素对萃取率的影响.结果表明:当溶液的pH在7～11范围内,Au(Ⅰ)的萃取率均大于98%;当pH＞11后,Au(Ⅰ)的萃取率显著变小;尽管TBP的浓度对Au(Ⅰ)萃取率的影响较小,但提高TBP浓度可以提高萃取pH50值.对矿山浸出液的萃取结果表明,N503/TBP萃取体系对金具有良好的选择性, 其萃取金属氰配阴离子的由难至易的次序为Fe(CN)64-＞Ni(CN)42-＞Zn(CN)42-＞Cu(CN)32-＞Au(CN)2-.     

Diagnostic microbeam technology in gold ore processing

This treatise offers a brief but comprehensive glimpse of how microbeam analytical techniques have been applied over the last 20 years to resolve problems in gold ore processing. It covers only those techniques that are being used on a routine basis to study gold occurrences in plant samples. To facilitate the readers’ understanding, the microbeam techniques are introduced (and assessed) from a problem-solving point of view. These microbeam techniques form an intricate part of the comprehensive mineralogical and analytical approach used to establish on a direct and quantitative basis the occurrence of gold in tailings. Gold deportments determined by microbeam analytical techniques will identify opportunities for optimization and provide realistic targets for reducing the gold content in tailings streams. This approach has been applied in a number of gold operations, with the ultimate benefit of improved gold recovery. For more information, contact S. Chryssoulis, AMTEL, 205-100 Collip Circle, London, Canada N6G 4X8; (519) 858-5037; fax (519) 858-5038; e-mail amtel@skynet.ca.     

β-二酮与CYANEX923或LIX84I混合萃取剂从氨性体系中协同萃锌(英文)

研究β-二酮(HA)与CYANEX923或LIX84I的混合萃取剂在氨性溶液中的萃锌行为;系统讨论有机相萃取剂浓度、水相pH、总氨浓度、温度和阴离子等对萃取性能的影响,从锌萃合物及β-二酮萃取剂结构方面讨论2个混合萃取体系的协同萃取机理。结果表明,HA与CYANEX923混合比与LIX84I混合具有更加明显的协同效应;水相pH和总氨浓度的升高均使萃取性能降低,因为升高pH或氨浓度会促使锌氨配合物的生成,降低水相自由锌离子的浓度,但HA与CYANEX923混合体系在较高pH或总氨浓度下仍具有明显的萃取性能;不同阴离子对HA与CYANEX923混合萃取体系的性能没有明显影响,但在HA与LIX84I混合萃取体系和单独使用HA萃取过程中以(NH4)2SO4NH4NO3NH4Cl顺序降低。     

TBP与胺萃取碱性氰化物中的金

研究了TBP-胺二元萃取体系从碱性氰化液中萃取[Au(CN)2]^-及反萃取的可能性，考察了不同类型的胺、平衡pH值、胺含量、TBP含量等对萃取率的影响。在优化实验条件下，用含40％TBP-10％胺(正辛胺)的磺化煤油有机萃取体系，对金的萃取率达到97％以上，对金的萃取容量达3．8g／L，但仍未达饱和。应用试验2级萃取率可达99％。