N,N-二辛基甘氨酸萃取钯机理的研究

报道了Ｎ,Ｎ－二辛基甘氨酸从盐酸体系中萃取钯的机理,结果表明：钯的萃取率随酸度、氯离子浓度、钯离子浓度的增大而降低。采用斜率法测得萃合物组成为：Ｒ２ＮＣＨ２ＣＯＯＨ．ＨＨＰｄＣｌ４,其萃取反应式为：Ｒ２ＮＣＨ２ＣＯＯＨ．ＨＣｌ（Ｏ）＋ＨＰｄＣｌ＾－４（Ａ）＝Ｒ２ＮＣＨ２ＣＯＯＨ．ＨＨＰｄＣｌ４（Ｏ）＋Ｃｌ＾－（Ａ）。     

碱性NaCl溶液中铜阳极生成Cu2O的机理

用线性电势扫描法、计时电势法、循环计时电势法、旋转盘－环电极法及稳态极化曲线研究了碱性氯化钠溶液中铜阳极生成Ｃｕ２Ｏ的动力学，实验得到Ｃｕ２Ｏ的生成机理为：Ｃｕ＋Ｃｌ－ＣｕＣｌ－吸ＣｕＣｌ－吸＋（ｎ－１）Ｃｌ－－ｅＣｕＣｌ１－ｎｎＣｕＣｌ１－ｎｎ＋２ＯＨ－Ｃｕ（ＯＨ）－２＋ｎＣｌ－Ｃｕ（ＯＨ）－２１２Ｃｕ２Ｏ＋１２Ｈ２Ｏ＋ＯＨ－第四步为速度控制步骤     

单宁与含钙矿物类作用机理的模拟研究

借助红外光谱测试、模拟矿浆和混合溶液试验研究了单宁与含钙类矿物的作用机理、发现单宁能向钙离子组分发生络合或螯合沉淀反应；进一步研究表明，参加上述反应的钙离子组分是其羟基络合物（Ｃａ（ＯＨ）＋），单宁分子中起反应的官能团主要是羟基（－ＯＨ）和其水解形成的羧基（－ＣＯＯＨ）。     

凡口方铅矿—黄铁矿选择性分离机理研究

采用Ｘ－光电子能谱及电化学测试研究了高石灰用量条件下，凡口方铅矿－黄铁矿选择分离的机理。高石灰介质中，黄铁矿表面形成了Ｃａ（ＯＨ）２、Ｆｅ（ＯＨ）３亲水膜；方铅矿表面形成了Ｃａ（ＯＨ）２、ＨＰｂＯ－２亲水膜。加入高浓度丁基黄药后，方铅矿表面亲水组分向疏水组分Ｐｂ（ＢｕＸ）２，转化，而黄铁矿表面由于优先氧化仍生成Ｃａ（ＯＨ）、Ｆｅ（ＯＨ）３亲水组分，无双黄药生成，造成方铅矿与黄铁矿的选择性分离。而高     

方铅矿矿浆电解热力学

对方铅矿（ＰｂＳ）在氯盐水溶液中的溶解度，ＰｂＳ－Ｃｌ－Ｈ２Ｏ系φ－ｐＨ与φ－ｌｇ〔Ｃｌ－〕图的分析表明：在矿浆电解时方铅矿可同时以三种机理浸入溶液，即１．ＰｂＳ的化学溶解ＰｂＳ（ｓ）＋２Ｈ＋（ａｑ）＝ＰｂＣｌ２－４（ａｑ）＋Ｈ２Ｓ（ａｑ）；２．ＰｂＳ被水溶液中Ｃｕ（Ⅱ）与Ｆｅ（Ⅲ）氧化ＰｂＳ（ｓ）＋２Ｃｕ（Ⅱ）（ａｑ）＋４Ｃｌ－（ａｑ）＝ＰｂＣｌ２－４（ａｑ）＋２Ｃｕ（Ｉ）（ａｑ）＋ＳＯ（ｓ）３．阳极氧化ＰｂＳ（ｓ）＋４Ｃｌ－（ａｑ）－２ｅ＝ＰｂＣｌ２－４（ａｑ）＋ＳＯ（ｓ）元素硫既可通过ＰｂＳ氧化而生成于矿粒表面，也可通过溶液中的Ｈ２Ｓ氧化而生成单独的元素硫颗粒，黄铁矿的共生有利于化学氧化过程的进行。     

羧酸锑的合成

对羧酸锑的合成进行了详细的研究，采用羧酸与三氧化锑在溶剂中直接合成的方法成功地合成了五种羧酸锑化合物（ＰＣＯＯ）３Ｓｂ，其中Ｒ为ＣＨ３（ＣＨ２）４－，ＣＨ３（ＣＨ２）６－，ＣＨ３（ＣＨ２）８－，ＣＨ３（ＣＨ２）１０－和Ｃ６Ｈ５－。己酸锑和辛酸锑是浅黄色液体，癸酸锑为棕褐色液体，而月桂酸和苯甲酸锑则为白色固体。首次对产品进行了红外光谱分析，锑含量及有关物化常数的测定。     

矿浆电解法处理铋精矿的研究

本文采用独特的湿法冶金技术──矿浆电解法，在盐酸－三氯化铁一氯盐体系中，就湖南柿竹园铋精矿的处理进行了系统的理论探讨和条件试验研究，提出了相应的浸出机理。浸出过程发现，溶液中适量的铁离子的存在，可以提高浸出速率，提高阳极电流效率。石墨阳极反应主要是铁高子的转换反应，浸出过程主要是辉铋矿与盐酸的分解反应及三价铁和Ｈ２Ｓ的氧化还原反应，阳极浸出过程机理如下：Ｂｉ２Ｓ３＋６ＨＣｌ＋（２ｎ一６）Ｃｌ－＝２ＢｉＣｌｎ（３－ｎ）＋３Ｈ２Ｓ（ｎ＝１￣６）２Ｆｅ３＋＋Ｈ２Ｓ＝２Ｆｅ２＋＋Ｓｏ＋２Ｈ＋Ｆｅ２＋－ｅ＝Ｆｅ３＋阴极发生铋的沉积：Ｂｉｃｌｎ（３－ｎ）－３ｅ＝Ｂｉ＋ｎＣｌ－（ｎ＝１～６）Ｆｅ３＋＋ｅ＝Ｆｅ２＋     

凡口方铅矿—黄铁矿选择性分离机理研究

采用Ｘ－光电子能谱及电化学测试研究了高石灰用量条件下，凡口方铅矿一黄铁矿选择分离的机理。高石灰介质中，黄铁矿表面形成了Ｃａ（ＯＨ）＿２、Ｆｅ（ＯＨ）＿３亲水膜；方铅矿表面形成了ｃａ（ＯＨ）＿２、ＨＰｂＯ－＿２亲水膜，加入高浓度丁基黄药后，方铅矿表面亲水组分向疏水组分Ｐｂ（ＢｕＸ）＿２转化，而黄铁矿表面由于优先氧化仍生成Ｃａ（ＯＨ）＿２、Ｆｅ（ＯＨ）＿３亲水组分，无双黄药生成，造成方铅矿与黄铁矿的选择性分离。而高浓度乙基黄药既不能使方铅矿表面转化成Ｐｂ（ＦＸ）＿２．又不能在黄铁矿表面生成双黄药，不能实现二者的分离。     

碱法原地浸出采铀中的结垢与防止

本文简要介绍了减法原地浸出采铀中的结垢问题—结垢的危害、产生的原因及防止的办法。试验表明，结垢的主要成分是ＣａＣＯ３，其中Ｃａ２＋和ＣＯ３２－主要分别来自地下水、矿层和溶浸剂。在溶浸液流动回路中，加人少量的（ＮａＰＯ３）６等化学试剂可有效地抑制结垢的生成。     

Bi2S3矿浆电解热力学

由Ｂｉ２Ｓ３在ＮａＣｌ溶液中的溶解度,Ｂｉ２Ｓ３－Ｃｌ－Ｈ２Ｏ系的电位－ｐＨ,电位－ｌｇ「Ｃｌ」图分析表明：Ｂｉ２Ｓ３矿在氯盐水溶液中的溶解度有了很大的提高,在矿浆电解时它同时存在三种浸出机理。即 １．化学溶解,Ｂｉ２Ｓ３（Ｓ）＋３ｎＣｌ（ａｑ）＋６Ｈ（ａｑ）＾＋＝２ＢｉＣｌ＾３－ｎｎ（ａｑ）＋３Ｈ２Ｓ＾０（ａｑ） ２．化学氧化。Ｂｉ２（３Ｓ）＋６Ｆｅ＾３＋（ａｑ２）＋２ｎＣｌ＾－（ａｑ）＝６Ｆｅ     

China rare earth market review

正November 1~10,2014Chinese rare earth market was still inactive.Demand for rare earth products was weak.Consumers took a wait-and-see attitude for lower price.As it was an off season for rare earth products,it was expected that prices of rare earth could continue turbulence at the bottom in short terms.Due to a sharp drop,demand for rare earth from downstream recovered.Affected by new energy vehicles,wind powder and energy-efficient appliances,production of rare earth permanent     

China rare earth market review

正August 1~10,2014 There was some good news in rare earth industry recently.Restructuring plans of rare earth groups led by Baotou IronSteel Group and Xiamen Tungsten Group respectively have been approved by MIIT.And rare earth storage policy,which had been expected for a very long time,has been launched officially.Pushed by the good news,rare earth price started to rebound since August 5.Price of didymium oxide and dysprosium oxide rose about 1% to 2%,averagely.About 10% of     

China rare earth market review

正July 1~10,2014Due to weak demand from downstream industry and slow transactions,rare earth market remained weak and price of rare earth products continued to decline.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,     

New energy vehicle:an opportunity for rare earth magnets

<正>Extracted from Securities Guide 1.Popularity of new energy vehicles—an irresistible market trend1.1 Progress of new energy vehicles Chinese Premier Li Keqiang said recently on a visit to Xi'an BYD Autos that new energy vehicles,especially new energy bus,can lessen environment and noise pollution.He encouraged the use of new     

注浆加固技术在十三矿-685 m进风大巷中的应用

针对煤矿开采深度不断向深部延伸,掘进巷道受深部高应力的影响越来越大,巷道围岩整体稳定性差,矿山压力显现越剧烈现象,一般锚网喷加锚索支护无法从根本上控制巷道的变形。总结了平煤股份十三矿-685 m进风大巷注浆加固技术,依据对巷道掘进之后变形监测数据的采集,对巷道变形机理进行分析研究,并对注浆时段进行了合理选择,在对巷道的注浆工艺进行了充分论证的基础上,对巷道进行了注浆。注浆后效果表明:巷道滞后注浆时间段的选择非常重要,巷道在恰当的时间内进行注浆加固施工,能有效控制巷道的变形,巷道注浆后变形量明显减小,岩体的稳定性明显增强,减少了巷道日常维修工作,降低了矿井的生产成本,保障了矿井的安全生产。     

稀散金属产业的观察与思考

分析了近年来国内外稀散金属产业的生产、应用、资源与市场状况.铟锡氧化物靶材、砷化镓晶片、锗红外材料、铼高温合金和硒在电解锰及玻璃的应用等已成为稀散金属的主要应用领域.稀散金属的产量快速增长达到历史高位而导致了市场的失衡.以GaInP_2/GaAs/Ge,CIGS和CdTe为代表的非硅系太阳能电池是稀散金属的新兴应用领域,将给稀散金属带来日益增长的需求.     

China rare earth market review

正November 21~30,2014Due to weak demand from downstream industries,transactions of rare earth in Chinese domestic market were inactive.It was difficult to sell any rare earth products except for dysprosium oxide and terbium oxide.Suppliers lost confidence in recent market.Demand for rare earth products was soft.Consumers continued to take a wait-and-see attitude.Rare earth export market remained slow.     

Current situation and future trend of China rare earth luminescent materialindustry(continued)

<正>Developing ecological lighting source The world is facing the big problem of energy shortage today and the contradiction between economy development and environmental protection is worsened.Therefore,people are more likely to choose an ecological light source that is more energy efficient and environmental friendly.The choice provides great opportunity for the development of rare earth optical material industry in China.The concept of green lighting positions rare earth luminescent material as a leading player in illumination market.The light source of both rare earth luminescent lamp and LED lamp is ecological and energy saving.This is why     

Galaxy Magnets achieved the net profit of 34.02 million yuan in the first six months of 2014

正Galaxy Magnet announced its financial results for the first half of 2014 on August 14.For the first six months ended on 30 June 2014,Galaxy Magnet achieved operation income of RMB 182.3 million,up8.40% over the same period of 2013,and the net profit attributable to the shareholders of the listed company of 34.02 million yuan,increasing 35.49% over the same period of last year.Stable performance increase was led by development of new customers and application market of magnets.     

Rare Earth Application in Steel in China

<正>China has rich rare earth resources.Output of rare earth and steel in China ranks the top first in the world.However,there is still certain distance between the steel produced in China and developed countries from the point of varieties and quality.China still has to import some types of steel.Improving the quality should be emphasiZed in future development of steel industry in China.Rare earth can be used to upgrade traditional steel