四川某企业沸腾氯化炉中加盐除三氯化铝的工艺条件

针对国内沸腾氯化生产的粗TiCl4中AlCl3偏高的问题,在对AlCl3除去机理深入分析的基础上,研究在沸腾氯化炉内加盐除AlCl3反应温度及加盐量对粗TiCl4中AlCl3去除率的影响.最终得出控制氯化炉炉顶反应温度为900～1 000℃,工业盐最佳加入量为高钛渣加入量的1.0％～1.2％.     

碳热氯化法分解包头混合稀土精矿提取稀土

研究包头氟碳铈-独居石混合稀土精矿的碳热氯化反应,考察反应时间、反应温度和脱氟剂对稀土提取率的影响.结果表明,包头氟碳铈-独居石混合稀土精矿的碳热氯化反应的较佳工艺条件为反应温度800℃,反应时间2h.在脱氟剂AlCl3存在下,800℃时氯化反应2h,稀土提取率高达98%.X射线衍射结果表明,在脱氟反应过程中,AlCl3和矿物分解产生的REOF发生了脱氟反应,使氟碳铈矿中的氟被转化为难溶于水的AlF3而留在滤渣中,同时AlCl3促进了独居石的分解反应.     

选择氯化钛铁矿制取人造金红石

研究了选择氯化钛铁矿制取人造金红石反应的Fe-Ti-C-O2-Cl2系平衡图,计算了氧与某些氯化物相互作用的自由能变化,采用"通氧一步选择氯化法",在钛铁矿原料中配加适量的碳,并往炉内通入相应量的氧气或空气,可以解决选择氯化"自热"反应持续进行的技术关键.对反应参数,如温度、配碳量、物料粒度、氯化时间和通氧量等均进行了实验室、半工业和工业化生产试验研究.研究证明,选择氯化过程的动力学模型是"固体颗粒粒度保持不变的缩核反应模型",动力学区的活化能为34.33kJ/mol;扩散区的活化能为0.80kJ/mol.试验结果表明,这种选择氯化新工艺具有流程短、产能大、产品质量好、成本低、操作简单等优点.研究开发的无筛板沸腾氯化炉可以长期稳定地连续运转,生产出的人造金红石品位为92.10%.经摇床和磁选,品位达到95%,钛的回收率和氯的利用率都大于95%,床层单位炉产能达12.4t/m2d.该工艺和设备已成功地应用于工业生产.     

福美锌在硫酸锌溶液中除钴的作用

研究了用福美锌从硫酸锌溶液中除钴的效果,考察了影响除钴的若干因素。试验结果表明,满足锌电积的最佳技术条件为:福美锌加入量1.8 g/L,反应温度50~80℃,反应时间30~60 min,反应p H 4.1~5.0。在此条件下,钴杂质能达到84%以上的脱除率,溶液中的游离钴杂质浓度能降到0.6mg/L以下。     

硫酸锰溶液深度除钼的试验探讨

采用粉体四氧化三锰为吸附剂,对硫酸锰溶液深度除钼工艺进行了研究。考察了硫酸锰溶液的浓度、溶液的初始pH值、吸附剂的加入量、反应时间及温度等因素对四氧化三锰吸附除钼的影响。结果表明,在硫酸锰浓度为70~200g/L、Mo 1 mg/L左右、溶液初始pH值1.2~2.8、除钼反应温度为80℃左右、反应时间30min及四氧化三锰加入量大于1.33g/L的条件下,四氧化三锰的除钼效果最佳,除钼后溶液的残余Mo浓度均低于0.015mg/L,完全达到生产无汞碱性锌锰电池专用电解二氧化锰的要求。     

选择氯化钛铁矿制取人造金红石

研究了选择氯化钛铁矿制取人造金红石反应的Ｆｅ－Ｔｉ－Ｃ－Ｏ２－Ｃｌ２系平衡图,计算了氧与某些氯化物相互作用的自由能变化,采用“通氧一步选择氯化法”,在钛铁矿原料中配加适量的碳,并往炉内通入相应量的氧气或空气,可以解决选择氯化“自热”反应持续进行的技术关键．对反应参数,如温度、配碳量、物料粒度、氯化时间和通氧量等均进行了实验室、半工业和工业化生产试验研究．研究证明,选择氯化过程的动力学模型是“固体颗粒粒度保持不变的缩核反应模型”,动力学区的活化能为３４．３３ｋＪ／ｍｏｌ;扩散区的活化能为０．８０ｋＪ／ｍｏｌ．试验结果表明,这种选择氯化新工艺具有流程短、产能大、产品质量好、成本低、操作简单等优点．研究开发的无筛板沸腾氯化炉可以长期稳定地连续运转,生产出的人造金红石品位为９２．１０％．经摇床和磁选,品位达到９５％,钛的回收率和氯的利用率都大于９５％,床层单位炉产能达１２．４ｔ／ｍ２ｄ．该工艺和设备已成功地应用于工业生产．     

从包钢选矿厂尾矿中回收稀土的工艺研究

研究了包钢选矿厂尾矿经AlCl3或MgO脱氟后加碳氯化提取稀土的反应原理和工艺,考察了碳热氯化反应时间和脱氟剂对稀土提取率的影响。结果表明:700℃碳热氯化2h,在脱氟剂AlCl3存在下,稀土提取率可达77%;在脱氟剂MgO存在下,稀土提取率可达84%。     

细粒富钛料制粒工艺技术研究现状

钛资源经过富集提钛、除杂处理,获得满足沸腾氯化法对炉料要求的富钛料。但细粒富钛料占比多,难以满足沸腾氯化法对炉料粒度的要求。细粒富钛料在沸腾氯化过程中易导致沟流、节涌,细颗粒逸出量大等问题,造成沸腾氯化率低、炉料反应不充分,且严重影响沸腾氯化工艺的顺行。因此,对细粒级富钛料进行制粒处理,使其满足原料粒度要求,是制备出优质沸腾氯化炉料的关键问题之一。本文详细总结了细粒级富钛料颗粒制粒的方法及所需粘结剂,分析了目前细粒富钛料制粒的方法及采用的粘结剂中存在的问题,并指出采用固结温度低的无机或有机-无机复合粘结剂,对细粒级富钛料进行流态化制粒是有利于实现工业化的发展方向。      

火法精炼紫杂铜除Pb、Fe研究

研究了氧化精炼过程中精炼温度和Cu_2O加入量对紫杂铜除Pb、Fe效果的影响,采用扫描电子显微镜(SEM)和能量弥散X射线光谱(EDS)观察熔渣形貌并对熔渣化学成分进行检测,结合X射线衍射(XRD)对熔渣进行物相分析,同时对磷硅酸盐熔剂的除杂机理进行探讨。结果表明,精炼温度和Cu_2O加入量对除铅效果影响很大,而对除铁效果几乎没有影响;在1 115~1 290℃范围内,随着精炼温度的升高,除铅率逐渐下降;在1 115℃条件下,随着Cu_2O加入量的增加,除铅率呈现上升趋势,最佳Cu_2O加入量为11.35%;磷硅酸盐熔剂具有较好的除杂效果,除铅率最高可达96%,除铁率基本在90%以上;熔体中的Pb、Fe主要通过其氧化物与磷硅酸盐熔剂反应除去,或者被磷硅酸盐熔剂吸附溶解。     

锑火法精炼除铅的研究

由五氧化二磷(A)和碳酸钠(B)的混合物组成的熔盐除铅剂，直接加入到锑熔液中，考察温度、时间及除铅剂加入量、原料配比等对除铅效果的影响．在m(A)：m(B)=3：1，800℃，除铅剂的加入量为粗锑质量的20％，除铅50min的条件下，可使锑中含铅从4％降至0．015％。     

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