盐酸直接浸取钛铁矿制取人造金红石

研究了盐酸直接浸取钛铁矿制取金红石的方法，探讨了搅拌条件、盐酸浓度、浸取时间、温度、矿粉粒度对浸取效果的影响，利用Ｘ－粉末衍射证明所得产物实现了由锐钛型至金红石型的转型，得到了浸取过程的最佳工艺条件为盐酸浓度６．２７ｍｏｌ／Ｌ；浸取温度１１０℃；液固比４：１（质量）；颗粒粒径３００目以下     

稀盐酸直接浸取攀枝花钛精矿反应动力学的研究

针对攀枝花地区钛精矿的特点,采用稀盐酸直接浸取钛精矿制取人造金红石产品,虽然是加工高钙镁钛精矿的有效途径,但在工业生产工艺中,还存狂反应时间长和人造金红石品位不够高的缺点。很有必要进一步探讨强化反应过程和提高反应速度的途径。为此我们进行了稀盐酸浸取攀枝花钛精矿反应动力学的研究。     

硫脲法浸金研究

研究了用硫脲法浸取硫化金矿时，矿石预处理、硫脲浓度，硫酸铁浓度，酸度，浸取时间，固液比等实验条件对金浸出率的影响，并对结果进行了讨论。     

硫脲法从废旧电路板中浸取金、银的研究

废旧电路板中含有丰富的可回收金属Cu,Au,Ag,Pt,Pb等,其处理处置、无害化、资源化成为经济发展中急需解决的问题。采用硫脲法对废旧电路板中的金、银进行浸取实验,主要考察了反应时间、反应温度、硫脲浓度、Fe3＋的质量浓度、物料粒度对金及银浸出率的影响。结果表明,在最佳浸取条件下,金、银都能达到理想的浸取效果,金和银的最高浸取率分别达到90.87%和59.82%。硫脲提金法因溶金速度快,浸出时低毒、价格低廉、高效、有利于环保、干扰离子少等优点而成为取代氰化提金的绿色浸金方法。     

石硫合剂(LSSS)浸金的研究

对某金矿进行了LSSS法添加NaCl在常温下的浸取条件研究，当LSSS中的L／S在3：1时，[NH3]=0．5-0．8mol／L，[NaCl]=0．8mol／L，温度在25℃，浸取时间为3h，浸出率可达到94％以上，从而实现了在常温下低[NH3]浸取金的目标，并且降低了生产成本。     

绿茶连续逆流浸取动力学研究

对绿茶连续逆流浸取的动力学问题进行了研究，用Ｌ型螺旋式连续逆流浸取器浸取绿茶时，浸取温度和水茶比对沿浸取器长度与浸法浓度之间的相互关系有显著影响。但随浸取温度的升高，影响程度减弱，而浸取时间的影响不显著。获得的线性回归方程对该浸取器的设计很有价值。     

连续逆流浸取器提取天然烟碱的研究

对单级浸取，多级错流浸取和连续逆流浸取进行了试验比较，并结合废次烟叶浸取的特点，设计出一种连续逆流浸取器，并研究了该装置的操作参数对浸取率的影响。试验表明，连续逆流浸取效果最优，该方法流程简单，技术可行，为工业性设计提供理论依据。     

磁场强化硫脲提金技术的热力学研究

与常规硫脲浸金相比,磁场强化硫脲浸金可得到更高的浸金率,且金的溶解速度更快．根据不同温度下的浸出试验结果,利用Ａｒｒｈｅｎｉｕｓ公式计算了体系浸出的表现活化能,计算结果表明磁场强化使硫脲浸取高砷金精矿体系的表现活化能由１３．０２ｋＪ／ｍｏｌ降至１０．５３ｋＪ／ｍｏｌ．此外,还从热力学的宏观角度与微观角度讨论了磁场强化硫脲提金工艺的强化作用机理．     

硫代硫酸盐法添加氯化钠、十二烷基磺酸钠浸取金矿研究

对湖北氧化铁型金矿,进行了Na_2S_2O_3法添加NaCl而不加Cu~(2+)的浸取条件优化研究,当[S_2O_3~(2-)]=0.8mol/L、[NH_3]=1～2mol/L、[NaCl]=1.0mol/L,浸取温度50℃,浸取时间3h,浸出率达到98％。对硫化矿(广东河台金矿、山东招远金矿)进行了浸取研究,[S_2O_3~(2-)]=0.8mol/L、[NH_3]=2mol/L、[NaCl]=1.0mol/L、十二烷基磺酸钠为11.0mmol/L,浸取温度50℃,时间3h,浸取率分别达到96％和93％。     

难浸金矿无污染预处理的工艺研究

讨论在常压，通氧的条件下，温度、时间、碱浓度及固液比等因素对难浸金矿石金浸出的影响，实验表明，在反应温度为７０℃，时间４ｈ，５％ＮａＯＨ，固液比１：４及０．５％的接触氧化剂作用下，金的浸取率为８７．８％，而对环境无污染。     

Extracting gold from pyrite roster cinder by ultra-fine-grinding and resin-in-pulp

1　ＩＮＴＲＯＤＵＣＴＩＯＮＲｅｓｉｎ ｉｎ ｐｕｌｐｐｒｏｃｅｓｓｉｓａｎａｄｖａｎｃｅｄｔｅｃｈ ｎｉｑｕｅｏｆｅｘｔｒａｃｔｉｎｇ ｇｏｌｄｗｉｔｈｏｕｔｆｉｌｔｅｒ ,ｉｎｗｈｉｃｈｇｏｌｄｉｓｄｉｒｅｃｔｌｙｅｘｔｒａｃｔｅｄｆｒｏｍｃｙａｎｉｄｅｐｕｌｐｗｉｔｈｉｏｎｅｘｃｈａｎｇｅｒｒｅｓｉｎ .Ｉｔａｖｏｉｄｓｌｉｑｕｉｄｓｏｌｉｄｓｅｐａｒａｔｉｏｎ ,ｄｅｃｒｅａｓｅｓｌｏｓｓｏｆｇｏｌｄｉｎｔａｉｌｗａｓｈｉｎｇｓａｎｄｉｎｃｒｅａｓｅｓｔｈｅｒｅｃｏｖｅｒｙｏｆｇｏｌｄ[1,2 ] .353Ｅ…     

用氰化法浸取炼银炉炉渣中的金银

对某地炼银炉渣氰化浸出金银进行了较系统的研究，考察了几种不同预处理方法对续后氰化浸取的影响．找到了适宜于该炉渣特点的技术关键：采用加剂焙烧一Ｈ２Ｏ２氧化一氰化浸出的工艺，可使金、银的浸出率分别达７９．１３％和５５．７３％，而传统氰化效果很差，单经加剂焙烧或Ｈ２Ｏ２氧化或加压等预处理后，金、银的浸出率有所提高，但指标不令人满意．     

Electrochemical behaviors of gold and its associated elements in various complex agent solutions

1　INTRODUCTIONGoldisquitestableanddifficulttodissolveinacommonmineralacid .However ,becausethereisadelectroniclayerunfilledingoldatomicstructure ,goldcanbecombinedwithmanychemicalagentstoformstablecomplexions,causingthepotentialofgoldinasolutiontodecreaseandgoldtodissolveinthesolutioneasily .Basedonthisprinciple ,cyanideisanefficientlixiviatingagentofgold ,andhasbeenwidelyusedtoextractgoldfrom primaryandsecondaryresources .However ,itisthemosttoxicandnotbeneficialtoen vironmentprotection…     

黄铁矿伴生金回收研究进展

Pyrite is one of the most important minerals bearing gold, and also the major resource of the gold production in China. However, the gold associated with pyrite is reported to be finely disseminated in complex structure, resulting in great recovering difficulty. This article reviews the mineralogical characteristics of gold associated with pyrite, and the research progress of common physical and chemical beneficiation processes for it. The principle of each gold extraction method and its applications in the recovery of gold associated with pyrite were illuminated, the merits and demerits of each method were discussed as well from the aspects of process cost, environmental hazard and gold leaching efficiency, etc. It is pointed out that, for refractory gold associated with pyrite, developing effective pretreatment process and highly selective leaching aids will be the future research directions to improve the gold leaching efficiency.
     

氯化浸出铅阳极泥回收金的研究

试验对湿法处理铅阳极泥回收金进行了研疣．实验结果表明：铜的浸出是酸浸除杂的主要影响因素,在温度为65℃,盐酸浓度为2．9moL／L,氯化钠浓度为1．3mol／L,硫酸浓度为0．3mol／L时,铜的浸出率达到92．03％,杂质能有效去除．在氯化浸金的过程中,温度与氯酸钠的用量对金的浸出率影响最大．随着两者的增加,金的浸出率将明显地增加．当温度大于80℃,氯酸钠用量大于料重的12．5％,硫酸浓度为1．5mol／L时,金的浸出率大于98％．     

Pretreatment and thiosulfate leaching of refractory gold-bearing arsenosulfide concentrates

A hydrometallurgical process for refractory gold-bearing arsenosulfide concentrates at ambient temperature and pressure was presented, including fine grinding with intensified alkali-leaching （FGIAL）, enhanced agitation alkali-leaching （EAAL）, thiosulfate leaching and displacement. Experimental results on a refractory gold concentrate showed that the total consumption of NaOH in alkaline leaching is only 41% of those theoretically calculated under the conditions of full oxidization for the same amount of arse- nides and sulfides transformed into arsenates and sulfates, and 72.3% of gold is synchro-dissoluted by thiosulfate self-generated during alkaline leaching. After alkaline leaching, thiosulfate leaching was carried out for 24 h. The dissolution of gold is increased to 91.9% from 4.6% by cyanide without the pretreatment. The displacement of gold by zinc powder in the solution gets to 99.2%. Due to an amount of thiosulfate self-generated during alkaline leaching, the reagent addition in thiosulfate leaching afterwards is lower than the normal.     

废旧印刷线路板两步浸出有价金属

为回收废旧印刷线路板中的有价金属,采用两步浸出的方法对其进行处理.先用双氧水-硫酸浸出贱金属,再用王水浸出贱金属浸出渣中的金.10 g废旧印刷线路板贱金属最佳浸出条件为双氧水20 mL,固液比1:5,硫酸浓度5 mol/L,反应温度60℃,反应时间90 min,原料溶损率达90.0%;金最佳浸出条件为反应温度40℃,反应时间30 min,浸出率达97.5%,研究证明两步浸出法能有效处理废旧印刷线路板,金溶出过程受扩散控制。     

冶炼废水处理污泥中金的浸出过程动力学

有色冶炼废水处理污泥中含有7.70 g/t的金和90.30 g/t的银,从污泥中提取金、银等有价金属,不仅可以减小污泥对环境的危害,还能较好地避免资源浪费.以硫氰酸铵为浸出剂对除砷后的二次污泥进行了浸金研究,并采用未反应核收缩模型对浸金过程的表观动力学进行了探讨,通过尝试法确定了浸出过程的控制步骤.结果表明,搅拌强度为250 r/min时,该浸出过程受固体产物层扩散控制,其动力学方程为1-2η/3-(1-η)2/3=kDt,反应扩散系数为D’=10.807 exp(-9 855/RT),cm5.359 4mol-1.119 8s-1,表观活化能为9.855kJ/mol.     

Processing technologies for gold-telluride ores

Gold telluride ores are important gold refractory ores due to the presence of sulfides and other gangue materials.The classification and main physical properties of gold telluride ores were described,and possible treatment methods including flotation,leaching,and oxida-tion were reviewed.The results show that flotation procedures are much easier for gold tellurides compared to other refractory gold-bearing ores.For the conventional cyanide leaching process,pretreatment such as oxidation is required to achie...