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     

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。     

辉银矿在FeCl3—HCl—NaCl体系中的浸取热力学分析

本文从热力学角度研究了ＦｅＣｌ３－ＨＣｌ－ＮａＣｌ体系从辉银矿（Ａｇ２Ｓ）中浸取银的原理，分析了ｐＨ值、Ｆｅ３＋与Ｃｌ－浓度以及反应温度等浸取热力学条件对反应的影响，并由阿仑尼乌斯公式推导出反应活化能。     

应用微机绘制电位─pH图分析氯氧化铋精矿提纯工艺

应用微机绘制了Ｂｉ，Ｆｅ，Ａｓ，Ｓｂ，Ｐｂ等元素的Ｍｅ－Ｃｌ－Ｈ２Ｏ系和Ｍｅ－ＮＯ３－－Ｈ２Ｏ系的Ｅｈ－ｐＨ图．在对Ｅｈ－ｐＨ图分析的基础上，制定了提纯氯氧化铋精矿，制取药用次硝酸铋的新工艺．     

应用微机绘制电—pH图分析氯氧化铋精矿提纯工艺

应用微机绘制了Ｂｉ，Ｆｅ，Ａｓ，Ｓｂ，Ｐｂ等元素的Ｍｅ－Ｃｌ＾－－Ｈ２Ｏ系和Ｍｅ－ＮＯ３＾－－Ｈ２Ｏ系的Ｅｈ－ｐＨ图，在对Ｅｈ－ｐＨ图分析的基础上，制定了提纯氯氧化铋精矿，制取药用次硝酸铋的新工艺。     

萃取分离EDTA络合滴定法测定镓的研究

在ｐＨ４～５的条件下，以ＰＡＮ，ＥＤＴＡ－Ｃｕ作指标剂，在８０℃左右用ＥＤＴＡ直接滴定Ｇａ＾３＋终点敏锐，３００ｍｇＣｕ＾２＋，Ｆｅ＾３＋，Ｚｎ＾２＋，Ｃｄ＾２＋，Ｂｉ＾３＋，１００ｍｇＰｂ＾２＋，Ｉｎ＾３＋，Ｓｎ（Ⅳ）；６０ｍｇＡｌ＾３＋；４０ｍｇＧｅ＾４＋，３０ｍｇＳｂ（Ⅴ）Ｍｏ（Ⅵ）１ｍｇＡｕ＾３＋Ｔｌ＾３＋经萃取分离后不干扰测定，本法可用于含镓０．５％以上样中镓的测定。     

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     

高铅掺氟Bi系超导体的研制

本文首次报道了五种高铅量Ｂｉ系超导体Ｂｉ２－ｎＰｂｎＳｒ２Ｃａ２Ｃｕ３Ｏｙ－ｘＦｘ（ｎ＝１．０，１．２，１．４，１．６，１．７）的制备，ｘ在１．０－１．４范围内，ｎ依次取上述值时，超导体的Ｔｃｏ分别为１１３．６Ｋ，１１２Ｋ，１０４Ｋ，８８Ｋ，７８Ｋ。Ｘ射线粉末衍射，红外光谱等分析表明，ｎ＝１．０－１．４时超导体仍２２２３相结构特征；ｎ＝１．６，１．７时表现出新的结构特点，此外从化学动力学观点初步探     

SmMn2Si2金属间化合物的合成和结构研究

用真空电弧熔炼合成ＳｍＭｎ２Ｓｉ２金属间化合物，并对合成条件进行研究，用Ｘ－射线衍射，电子衍射和Ｘ－射线光电子能谱法对合成的化合物进行结构表征。结果表明：ＳｍＭｎ２Ｓｉ２属ＴｈＣｒ２Ｓｉ２型体心四方晶系结构，晶格常数ａ＝３．９８５Ａ，ｃ＝１０．４９０Ａ，化合物中钐和硅的特征轨道，（３ｄ５／２，２ｐ３／２）结合能较单质状态分别减少０．６ｅＶ和增加０．３ｅＶ。     

摩尔比n(SiO2)/n(Al2O3)对发泡地质聚合物物理性能和微观结构的影响

使用固硫灰（ＣＦＡＳ）、硅灰（ＳＦ）、水玻璃（ＷＧ）、ＮａＯＨ和Ｈ２Ｏ２ 制备发泡地质聚合物,用 硅灰来调节地质聚合物的摩尔比 ｎ（ＳｉＯ２）／ｎ（Ａｌ２Ｏ３）,测试新拌浆体的发泡倍数、发泡速率。 对 硬化后浆体进行强度和表观密度等性能的测试,结合Ｉｍａｇｅ－ＰｒｏＰｌｕｓ软件分析孔径分布;通过Ｘ 射线衍射（ＸＲＤ）、傅里叶红外光谱（ＦＴＩＲ）、扫描电镜（ＳＥＭ）等手段分析发泡地质聚合物的 微观结构。 结果表明:在试验条件下,摩尔比 ｎ（ＳｉＯ２）／ｎ（Ａｌ２Ｏ３）的提高加速了水化反应速 率,适宜的摩尔比使得发泡时间提前;红外光谱波数的迁移表明,碱激发后 Ｓｉ—Ｏ 与 Ａｌ—Ｏ 键发生重排,合适的摩尔比对地质聚合物的重排反应是有利的,提高了聚合度;ＸＲＤ图谱显示有 沸石等产物生成;当摩尔比 ｎ（ＳｉＯ２）／ｎ（Ａｌ２Ｏ３）为２*７９ 时,试件２８ｄ 强度及表观密度分别为 １*０６ＭＰａ和２３１ｇ／Ｌ,此时试件微观结构具有良好的致密性。     

Current situation and future trend of China rare earth luminescent material industry

<正>Rare earth luminescent material is one of the most important application sectors of rare earths.China enjoys the exceptional advantage to develop rare earth luminescent material for its abundant rare earth resources.After several decades'endeavor,China's rare earth luminescent material industry,headed by rare earth phosphor for lamp and LED and high efficient rare earth energy-saving light source,has been gradually developed into a scale industry.China has become a major production base of rare earth phosphor for lamps and rare earth     

China rare earth market review

正June 1~10,2014Rare earth market remained weak.Quoted price of rare earth products was similar to that in May.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,polishing powder and ceramic industries remained inactive.Demand from downstream industry was soft.Consumers purchased on their needs.Suppliers had strong intention to sell.Prices of rare earth products     

Annual Report analysis of Chinese rare earth-related listed companies in 2013

<正>Chinese rare earth-related listed companies have published their 2013 annual reports.It can be understood from their reports that production and operation activities of Chinese rare earth-related companies were still heavily affected by macro economy and industrial policies.They basically followed the steps of national economy.In 2013,world economy recovered slowly but the economy     

Market opportunities and challenges for rare earth polishing powder

正1.Status of rare earth polishing powder Rare earth polishing powder with high content of cerium oxide began to replace iron oxide for glass polishing and became one of the key materials in glass polishing process since 1940.Compared with traditional iron oxide,rare earth polishing powder has many advantages,such as fast polishing rate,high polishing quality and long service life.It can achieve good surface quality and improve operation conditions.For example,in lens polishing,the polishing work that cerium     

Baotou Research Institute of Rare Earths developed a new RE alloy preparation technology

正Pyrometallurgy Laboratory of Baotou Research Institute of Rare Earths had independently developed a new preparation technology of rare earth alloy for NdFeB.The alloy can remarkably enhance the coercivity of NdFeB magnet but also evidently reduce the production cost of the magnet.The new master alloy was prepared in the kA pilot-scale electrolytic cell by the independent technology.The rare earth master alloy can be used as the raw material for NdFeB.Compared     

Market and recycling of NiMH battery

<正>Market status and future trend of NiMH battery1.Global market of small NiMH battery Global market size of small NiMH batteries declined year on year since 2011.The trend will continue to 2018,at the rate of 5%to 10%annually.Demand for small NiMH batteries will be stable gradually.Many electrical apparatuses are powered by the built-in lithium battery today,which is the main reason for the shrunk market of small NiMH batteries.But,for some products,small NiMH     

China rare earth market review

正September 1-10,2014 Affected by the National Day holiday,rare earth transaction was stagnant and the market showed a weak steady state.As there was no good news for downstream market,some products with flat demand would likely rally slightly for some time to     

2014 second batch of rare earth quota released

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矿用防爆轴流对旋主要通风机叶片ANSYS模态分析及应用

高效节能矿用防爆对旋主要通风机的叶片是主要通风机运行的关键部件,叶片在运行时不断受到气流的作用力,从而使叶片产生振动,当叶片振动的频率与叶片的固有频率接近时,容易产生共振从而导致叶片的断裂。一旦叶片断裂时,对主要通风机的安全运行产生致命的影响,从而导致矿山、化工等企业发生重大事故,将会产生不可估量的损失。基于有限元分析软件ANSYS,对高效节能矿用防爆轴流对旋主要通风机叶片进行模态分析及产生对应的六阶模态频率,对主要通风机叶片的运行频率、固有频率及产生的共振问题进行了原理分析,并且解决了叶片频率共振的问题,从而为主要通风机叶片结构设计提供理论依据,并对主要通风机叶片的安全运行提供保障。     

2013 NdFeB export analysis

<正>China totally exported nearly 24,000 tonsof NdFeB products during 201 3,including 18,825 tons of permanent magnet,valued USD 1.34 billion at an average price of 71.4 USD/kg;3,277 tons of NdFeB magnetic powder,valued USD 1 01 million at an average price of 30.9 USD/kg;1,334 tons of strip casting ribbon,with total export value of USD 74million at an average price of 55.3 USD/kg;and 586