含铜,铁离子废水的硫化沉淀浮选

为了寻求我国广大铜矿山酸性废水的有效治理途径，对江西某大型铜矿山含铜、铁离子的人工模拟废水及实际矿山废水进行了处理研究。模拟废水组成为ｐＨ２．２，Ｃｕ＾２＋１３０ｍｇ／Ｌ，Ｆｅ＾３＋（或Ｆｅ＾２＋）５００ｍｇ／Ｌ，研究表明：以铜的化学当量加Ｎｓ２Ｓ于含Ｃｕ＾２＋、Ｆｅ＾２＋人工废水中，以及以铜的３．４倍化学当量加Ｎａ２Ｓ于含Ｃｕ＾２＋、Ｆｅ＾３＋人工废水中，丁黄药作捕收剂，自然ｐＨ条件下，铜的去除     

铬的交流示波极谱滴定

提出了在ＰＨ５的ＨＡｃ－ＮａＡｃ＋ＫＢｒ体系中，加入过量的ＥＤＴＡ溶液与Ｃｒ络合，过剩的ＥＤＴＡ用０．０２ｍｏｌ／Ｌ的ＣｕＳＯ４标准溶液加滴，以Ｃｕ＾２＋在交流示波极谱ｄＥ／ｄｔ－Ｅ曲线上出现切口直接指示滴定测定铬的方法。铬量分析范围为０．８０－１８．００ｍｇ。回收率为９８．８５％－１００．４７％。对于含铬０．ＸＸ％－ＸＸ．ＸＸ％的试样，分析１０次的相对标准偏差为０．２８－１．１２％。     

AgCuZnCd四元合金中的Cu,Zn,Cd的连续滴定

采用连续滴定的方法在同一份试液中同时测定Ｃｕ,Ｚｎ,Ｃｄ,向试液中加入一定量的ＥＤＴＡ标准溶液,使Ｃｕ＾２＋,Ｚｎ＾２＋,Ｃｄ＾２＋全部与ＥＤＴＡ配合,然后用ＫＩ置换出ＥＤＴＡ－Ｃｄ中的ＥＤＴＡ,用硫脲置换出ＥＤＴＡ－Ｃｕ中的ＥＤＴＡ,并分别用Ｚｎ＾２＋盐滴定,从总量中减去Ｃｄ量和Ｃｕ量即得Ｚｎ量,Ｃｕ,Ｚｎ,Ｃｄ的加入回收率均在９８％以上,本法分析快速准确。     

4A沸石Ca^2＋吸附量测定方法探讨

本文介绍了新型助洗剂合成４Ａ沸石吸附Ｃａ＾２＋量的一种测定方法，即在已知质量浓度的ＣａＣｌ２溶液中处理４Ａ沸石，再用ＥＤＴＡ法测定其滤液中的Ｃａ＾２＋质量浓度，通过计算，可简单快速地测定出４Ａ沸石的Ｃａ＾２＋吸附量。     

金属离子对蓝晶石可浮性的影响及机理研究

作者研究了Ａｌ＾３＋、Ｆｅ＾３＋、Ｃａ＾２＋、Ｍｇ＾２＋４种金属离子对蓝晶石－油酸钠体系浮选行为的影响。认为金属离子在矿物表面的吸附或沉淀，对矿物的浮选行为有重要作用，进而用等离子体原子发射光谱（ＩＣＰ－ＡＥＳ）法测定了金属离子的吸附沉淀百分数（ＰＡＰ），并用ＰＡＰ成功地解释了金属离子对蓝晶石浮选行为的影响。     

辉锑矿的活化与浮选特性

研究了用黄药作捕收剂时辉锑矿的浮选特性。辉锑矿的浮选可分为三个区：易浮区（ｐＨ≤５）、活化区（ｐＨ５～１０）和非浮选区（ｐＨ≥１０）。重金属离子对辉锑矿的活化作用为：ＨｇＣｌ＿２＞Ｐｂ（ＮＯ＿３）＿２＞ＣｕＳＯ＿４＞ＺｎＳＯ＿４＞ＦｅＳＯ＿４＞ＦｅＣｌ＿８。Ｐｂ￣（２＋）比Ｃｕ￣（２＋）在辉锑矿表面具有更好的吸附特性，用ＸＰＳ证明ＣｕＳＯ＿４活化辉锑矿的最终产物是Ｃｕ＿２Ｓ。     

硼的极谱波研究与应用

在乙酸－乙酸钠缓冲溶液（ｐＨ４．３）－１．３１×１０＾－４ｍｏｌ／Ｌ铍试剂Ⅲ－３．４２×１０＾－２ｍｏｌ／Ｌ ＥＤＴＡ底液中，硼在－０．４５Ｖ（ｖｓ．ＳＣＥ）处有一灵敏的极谱波，波高与硼的浓度在２．３１×１０＾－７￣４．６３×１０＾－５ｍｏｌ／Ｌ范围内呈线性关系。拟定的方法应用于地球化学标样中微量硼的测定，操作简便，结果准确。     

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。     

金红石与磷灰石浮选分离中硫酸铝的作用研究

研究表明，在ＦＬ１０８作捕收剂条件下，硫酸铝强烈抑制金红石而使磷灰石上浮，采用“ＦＬ１０８＋Ａｌ２（ＳＯ４）３”的浮选药剂制度可实现两矿物的分离。通过分析Ａｌ＾３＋和金红石表面Ｔｉ＾４＋和金红石表面Ｔｉ＾４＋磷灰石表面Ｃａ＾２＋的水解特性，还阐述了Ａｌ２（ＳＯ４）３的选择抑制机理。     

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     

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