粗铟真空蒸馏除镉的研究及生产实践

粗铟真空蒸馏除镉的试验结果表明,在450～500℃、真空度20～30 Pa、蒸馏时间2 h的条件下,除镉率可达97%～99%.生产实践表明,采用该工艺除镉,粗铟含镉可降至0.01%,除镉后的铟能够满足电解工艺对原料的要求.     

真空蒸馏工艺生产镉的实践及改造

介绍了某厂粗镉真空蒸馏工艺生产精镉的生产情况, 分析了置换法生产的蒸馏镉杂质超标的原因。通过向真空蒸馏炉直接进液体料, 大大提高了产能。     

高镉锌真空蒸馏镉

论述了高镉锌真空蒸馏提镉的基本原理及内热式真空蒸馏炉的结构特点和材质,讨论了影响锌镉分离的重要因素(真空度、温度、合金含镉百分数、进料速度、蒸馏级数等),列出了试验取得的技术经济指标和提镉真空蒸馏的实例。扩大试验用含Cd29.11％、Zn68.72％的高镉锌,经20级空真蒸馏后,可产出精镉和粗锌。     

粗铋真空蒸馏脱银工艺研究

本文研究了粗铋真空蒸馏脱银的可能性及规律性。试验结果表明，采用真空蒸馏法脱除粗铋中银代替传统的加锌除银法，在技术上是可行的。在蒸馏温度９００～９５０℃，时间１５～２０ｍｉｎ，系统残压３８～４５Ｐａ，熔体深度４～５．４ｍｍ条件下，一级真空蒸馏含Ａｇ１．６３％的粗铋时铋挥发率在９９％以上，冷凝物中银含量为６８～１７０ｐｐｍ，银在残留物中含量达４５％～６０％。所得冷凝物经重蒸馏后含银降至２３～３１ｐｐｍ，低于国家一号精铋规定的含银标准。     

真空蒸馏-籽晶定向凝固工艺制备半导体用高纯铟

采用真空蒸馏-籽晶定向凝固工艺制备6N及以上高纯铟,考察了蒸馏温度、凝固速度及凝固次数对杂质脱除率的影响,并对半导体用高纯铟进行了表面分析及其纯度测定。结果表明,真空蒸馏温度1 273 K、保温时间60 min、定向凝固温度150~170 ℃、籽晶转速5 r/min、坩埚转速15 r/min、凝固速度20 mm/h、凝固次数3次条件下,高纯铟产品纯度达到6N及以上超高纯铟标准,该工艺所得金属铟结晶度高,呈现出片状结构,金属呈单晶相,实现了6N及以上金属铟的稳定结晶,并且金属铟没有腐蚀和表面氧化,该半导体用高纯铟制备工艺所得产品纯度高、制备过程能耗低和效率高,利于实现产业化。     

铟-锡合金真空蒸馏气-液平衡研究

在系统压力5 Pa～10 Pa、蒸馏温度1470 K～1570 K条件下,开展了铟-锡（In-Sn）二元合金真空蒸馏实验研究,结果表明随着蒸馏温度升高,液相中In含量从14.31 wt. %降至0.01 wt. %,表明真空蒸馏可有效分离In-Sn合金。采用分子相互作用体积模型（MIVM）计算In-Sn合金组元的活度,计算值与实验值的平均标准偏差分别为±0.0113、±0.0154,平均相对偏差分别为±11.8134%、±11.7322%,表明采用MIVM预测In-Sn合金组元的活度是可靠的。在此基础上,采用MIVM预测In-Sn合金体系的气-液平衡（VLE）数据,并与实验值进行对比,二者吻合,表明采用MIVM预测铟基合金体系的VLE是可靠的,可用于指导真空蒸馏分离铟基合金。本研究将模型预测与真空蒸馏实验相结合,不仅验证了MIVM的可靠性,还优化了真空蒸馏分离铟基合金的工艺参数,为真空蒸馏分离提纯铟基合金或处理含铟复杂物料提供指导。     

在密闭鼓风炉熔炼过程中锗铟的富集及综合回收

在密闭鼓风炉炼铅锌过程中,锗和铟富集于真空炉渣中,铟富集于B塔底铅和粗铅中.先采用氯化蒸馏从真空炉渣中回收锗,再从其残液中用TBP和P204萃取回收铟,锗、铟的回收率分别高于78%,83%;采用碱熔造渣捕集铟、水洗除碱、混酸浸出铟的工艺从B塔底铅中回收铟,回收率85%;采用硫酸熟化浸出、铁屑置换除杂、P204萃取富集的工艺从反射炉烟尘中回收铟,铟的回收率约85%.     

在密闭鼓风炉熔炼过程中锗铟的富集及综合回收

在密闭鼓风炉炼铅锌过程中 ,锗和铟富集于真空炉渣中 ,铟富集于B塔底铅和粗铅中 .先采用氯化蒸馏从真空炉渣中回收锗 ,再从其残液中用TBP和P2 0 4 萃取回收铟 ,锗、铟的回收率分别高于 78%,83%;采用碱熔造渣捕集铟、水洗除碱、混酸浸出铟的工艺从B塔底铅中回收铟 ,回收率85 %;采用硫酸熟化浸出、铁屑置换除杂、P2 0 4 萃取富集的工艺从反射炉烟尘中回收铟 ,铟的回收率约 85 %.     

株冶铟富集工艺的改进及应用研究

介绍了株洲冶炼厂铟富集的生产情况，提出了存在的问题。就如何改进生产工艺，以提高铟渣品位及铟回收率作了较深入地探讨。对比了工艺改进前后的生产效率，结果表明：工艺改进后铟渣品位和铟回收率均得到较大的提高，铟渣品位由1995年的2．23％提高到200l年的4．11％；铟回收率由1995年的41．以％提高到200l年的62．49％。并对高酸浸出铟工艺的进一步研究提出了建议。     

广东有色金属学报总目次

第1期云南省铟资源及其产业发展…………………………………………………刘大春,杨斌,戴永年,等(1)P204萃取铟的热力学研究……………………………………………………刘兴芝,房大维,李俊,等(4)新型镓锗萃取剂G315的应用研究……………………………………………王海北,林江顺,王春,等(8)粗铟真空蒸馏除镉的研究及生产实践………………………………………………………………吴成春(12)浅析中间下料预焙槽电解质分子比的控制方法……………………………………………………刘建新(15)制备超细镍粉的研究进展………………………………………………     

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     

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     

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     

唐口煤矿深部复杂开采工作面瓦斯分源涌出规律研究

研究工作面瓦斯涌出规律对工作面瓦斯治理有重要意义。为了得到唐口煤矿深部3号煤层复杂开采条件下工作面回采时期瓦斯涌出时空演化规律,选取6304工作面作为对象,采用实测方法研究6304工作面瓦斯涌出规律。结果表明:6304工作面瓦斯涌出量为6.534 m³/min,其中煤壁占34.27%,落煤占29.62%,采空区占36.11%;沿工作面倾向由低到高,瓦斯浓度整体为上升趋势,其中1—76号架工作面瓦斯浓度小于0.20%,76—102号架瓦斯浓度上升明显,最大为0.387%;上隅角的后部采空区是工作面的瓦斯主要涌出源,上隅角1号测点瓦斯浓度0.78%,上隅角周边3号、5号、7号、8号、9号测点瓦斯浓度平均为0.643%;周期来压时,上隅角瓦斯相对平时较高。研究为针对性的瓦斯分源监控与灾害防治提供基础。