自含砷含碳难处理金矿中提金研究──Ⅱ.硫氨脱砷-铜氨催化氧化-氰化

针对甘肃坪定金矿含金、砷高，脉石碱度高，砷矿物中雌黄、雄黄高的特点，研究了硫氨脱砷－铜氨催化氧化－氰化新工艺，采用了三种新技术，即稀氨水溶解雌黄、雄黄湿法转化为雌黄以及在氨水中氧化时用铜离子作催化剂.本研究为小型实验，结果为其后进行的3kg级扩试所证实。     

自含砷合碳难处理金矿中提取金的研究─Ⅰ.氨水脱砷-石灰加压氧化-氰化

针对甘肃省坪定金矿含金、砷高、金部分地赋存于脉石、脉石为碱性、属于难选难冶矿的特点，提出了氨水脱砷－石灰加压氧化－氰化新工艺．当原矿含金8．7g／t及13．0％砷时，砷可脱除95％，金可浸出85％．技术及经济指标预计均较满意．     

石灰湿法加压氧化预处理含砷金矿的研究

本文研究了加压氧化法预处理含砷金矿，由于加入木质素磺酸钠作表面活性剂，从而成功地用石灰乳液作为碱性物料预氧化含砷难冶金矿，获得金的氰化浸出率在85％以上     

含砷难浸金矿的硫氰酸盐法提金

研究了含砷难浸浮选金精矿的预处理。通过在空气流中进行二阶段焙烧（４３０℃和６５０℃）和碱溶液吸收Ａｓ２Ｏ３和ＳＯ２，脱砷和脱硫率分别可达９８％和９９％，并且有效地避免了空气污染。预处理后金矿在酸性溶液中，用硫氰酸铵溶液浸取。考察了硫氰酸铵浓度、ＭｎＯ２用量、酸度、温度、时间和微波场对浸金的影响。在最佳浸金条件下，金浸出率可达９３％。     

含砷金矿的湿法除砷

研究了含砷金矿的湿法除砷方法。实验表明,采用以 Ｎａ Ｏ Ｈ 为主的常压除砷方法,有很好的除砷效果和金的回收率。     

含砷难浸金矿的硫氰酸协法提金

研究了含砷难浸浮选金精矿的预处理。通过在空气流中进行二阶段焙烧（４３０℃和６５０℃）和碱溶液吸收Ａｓ２Ｏ３和ＳＯ２，脱砷和脱硫率分别为可达９８％和９９％，并且有效地避免了空气污染。预一金矿在酸性溶液中，用硫氰酸铵溶液浸取，考察了硫氰酸铵浓度，ＭｎＯ２用量、酸度、温度、时间和微波场对浸金的影响，在最佳浸金条件下，金浸出率可达９３％。     

氨性催化氧化-氰化法处理含砷难浸金矿的研究(Ⅰ)

本文提出的氨性催化氧化－氰化法处理含砷难浸金精矿新工艺，其特点是在氨性溶液中以Cu2＋作催化剂，O2作氧化剂，在85℃及200kPa的操作压力下，将毒砂氧化，使其中的金游离出来，固液分离后再进行CILO氰化．对于含有砷锑汞碳的丹寨金精矿，其金品位为16.5～22g／t；金的氰化率可达80～87％.     

氨性催化氧化-氰化法处理含砷难浸金矿的研究(Ⅱ)

本文概述了氨性氧化-氰化法处理含砷难浸金矿的扩大实验结果．对于含有砷、锑、汞、碳的丹寨金精矿，其金品位为17．6g／t，金的氰化率可达84％与小型实验结果相符．     

高砷金矿常温常压碱浸预处理工艺的分析

现阶段在高砷金矿的预处理当中主要使用的是焙烧氧化法,虽然其能够有效提高金的浸出率,但随着人们环保意识的不断加强,以焙烧氧化法为代表的传统预处理工艺已经无法与当下的可持续发展战略要求相符合。因此常温常压碱浸预处理工艺应运而生,其不仅能够顺利完成高砷金矿预处理工作,同时还能大大提升金的浸出率。从简单论述我国目前在高砷金矿预处理当中存在的问题作为切入点,着重围绕高砷金矿常温常压碱浸预处理工艺进行分析研究。     

金矿尾砂代替长石用于陶瓷墙地砖的研究

主要研究金尾矿中影响金矿尾砂代替长石作陶瓷墙地砖原料的主要因素－－Ｆｅ质。Ｃｌ对陶瓷墙地砖生产工艺及产品质量的影响;分析了产生影响的机理,讨论金矿尾矿砂除铁脱Ｃｌ的方法及工艺;确定了金尾矿代替长石作陶瓷墙地砖原料的加工工艺及有前的性能要求。     

GOLD ADSORPTION ON ACTIVATED CARBON AND THE EFFECT OF SUSPENDED SOLIDS AND DISSOLVED SILICON DIOXIDE

The use of gold adsorption by activated carbon has recently become widespread on South African gold mines. This has caused a great deal of interest in the kinetics of gold adsorption onto activated carbon. However, almost all previous work has been done using clear solutions. In practice the gold adsorption occurs from a slurry containing fine ground rock particles and possibly a number of other metals in solution as well as organics which may poison the carbon. As the next step in the understanding of the gold adsorption process, this work assesses the impact of a fine solid suspension on the gold adsorption kinetics. This is found to significantly reduce the adsorption rate of gold cyanide (Au(CN)2¯) by G210 activated carbon in completely mixed batch adsorbers. The relative effects of solid particle size and mixing intensity on the adsorption rate are investigated. Batch adsorption rate experiments are performed with clear solutions, and with solutions containing 20% (m/m) fine suspended solid material, agitated at impeller speeds of 200 and 300 r.p.m. with an initial gold cyanide concentration of = 10 p.p.m. Equilibrium isotherms for gold cyanide, gold cyanide/glass particles and dissolved silicon on G210 activated carbon were determined. The batch adsorption kinetics of gold cyanide from clear solutions were successfully modelled using the Homogeneous Surface Diffusion Model of Crittenden & Weber (1978). The adsorption of gold cyanide from clear solutions was found to be characterized by intra-particle diffusion rate control, limited by a finite film mass transfer rate at low gold loadings. When fine suspended solids are present it is shown that blinding of the carbon macropores is the likely cause of the reduced adsorption rate. Although the solids used were artificial in the sense that these would not be present in this form in an industrial operation, it was felt that using solids from an operating mine would introduce complications in addition to the specific effects this paper addresses.     

从氨浸电镀污泥产物中氢还原分离铜、镍、锌的研究

本研究采用湿法氢还原对电镀污泥氨浸产物中的铜、镍、锌等有价金属进行了分离回收．对氨浸产物进行焙烧、酸溶处理后，在硫酸铵体系弱酸性溶液中氢还原分离出铜粉，然后在氨性溶液中氢还原提取镍粉，最后沉淀回收氢还原尾液中的锌．有价金属的回收率达到98～99％．本文提出的流程简单，设备投资少，在工业生产及环境保护方面有较广的应用前景．     

OBSERVABLE MULTIPLICITY FEATURES OF INHOMOGENEOUS SOLUTIONS MEASURED BY THE THERMOCHEMIC METHOD: THEORY AND EXPERIMENTS

The thermochemic method, where the catalyst temperature is manipulated by Joule-heating, may falsify the underlying kinetics by inducing inhomogeneous solutions. This work analyzes the multiplicity and stability of these states in a wire with uniform activity with or without gaps in heat conduction. Measurements of integral properties may indicate the existence of inhomogeneities either by the existence of characteristic multiplicity patterns and bifurcation maps or by unique quantitative features

These tests are employed to show that the two intermediate branches, out of four observed in ammonia oxidation, are inhomogeneous solutions induced by lack of communication. The measured bifurcation set, separating the domains of existence of the four states, is mapped in the three dimensional space of reactants concentrations and temperature.     

OBSERVABLE MULTIPLICITY FEATURES OF INHOMOGENEOUS SOLUTIONS MEASURED BY THE THERMOCHEMIC METHOD: THEORY AND EXPERIMENTS

The thermochemic method, where the catalyst temperature is manipulated by Joule-heating, may falsify the underlying kinetics by inducing inhomogeneous solutions. This work analyzes the multiplicity and stability of these states in a wire with uniform activity with or without gaps in heat conduction. Measurements of integral properties may indicate the existence of inhomogeneities either by the existence of characteristic multiplicity patterns and bifurcation maps or by unique quantitative features

These tests are employed to show that the two intermediate branches, out of four observed in ammonia oxidation, are inhomogeneous solutions induced by lack of communication. The measured bifurcation set, separating the domains of existence of the four states, is mapped in the three dimensional space of reactants concentrations and temperature.     

新型水溶性纤维素黄原酸酯的合成与表征及用于金回收的研究

用羧甲基纤维素(CMC)与CS_2在一定条件下进行反应,合成了一种新型的水溶性纤维素衍生物纤维素黄原酸酯(CMCX)。用UV及IR谱进行表征,测得酯化度为3.0％,即含S量1.0％(重量比)。对其稳定性进行了较系统的研究。结果表明CMCX在固态比溶液状态稳定得多,找到了一种较有效的助凝剂CaCl_2。在CaCl_2和CMCX共同作用下,对于10mL浓度为10mg/L的金液,CMCX的用量为0.1g,作用时间1min,对金回收率可达96％。     

乳化液膜提金的研究——氰化浸出贵液中提金及回收氰化钠的工艺研究

本文提出了一种从氰化浸出贵液中提金及回收氰化钠的新工艺流程,建成了10t/d 处理量的自动分散乳化液膜连续逆流分离装置。研究了载体、内相试剂、相比(乳液与原料液体积之比)、外相pH 及分散颗粒大小等影响因素,提出了连续逆流分离装置的操作参数。实验证明:用该工艺流程能有效地从含金1～3 mg/L 的氰化浸出贵液中,将金富集浓缩50倍,同时使排放液中的游离氰根离子浓度低于0.5mg/L,达到国家排放标准。根据中试试验结果,进行了经济估算,证明液膜法较经济合算。