高铁硫酸锌浸出液中铟的富集

以高铁含铟硫酸锌溶液为原料,采用锌焙砂预中和硫酸锌液,在此基础上采用锌粉置换铟富集回收溶液中的铟。在预中和阶段讨论了焙砂用量对预中和后液酸度的影响,以及预中和后溶液酸度对焙砂中铟浸出影响,通过实验获得预中和最佳条件:预中和实验焙砂用量为理论用量的1.4倍,实验温度控制在70~75℃,预中和时间为30 min,预中和后溶液中硫酸浓度大约降至1.2 g·L-1;置换实验过程中溶液的pH值、反应时间、反应温度、锌粉用量等都是影响锌粉置换效果的因素,其中溶液的pH是影响铟的沉淀率的主要因素。实验确定了锌粉置换沉铟的最佳工艺条件为:溶液pH为4.0左右,反应温度80~85℃,反应时间1 h,锌粉用量为6 g·L-1,沉铟后液中In3+的浓度降至3 mg·L-1以下。在此最佳条件下,沉铟率在98%以上,沉铟渣中铟的品位在1.5%~3.0%。通过对置换渣的X衍射图谱(XRD)分析表明置换渣中的铟主要以In(OH)3形式存在。这说明置换过程的实质主要是铟的水解过程,随着置换过程的进行,硫酸锌溶液的酸度下降,促进铟的水解沉淀过程。     

氨浸法综合回收挥发窑氧化锌的试验研究

氨浸法综合回收挥发窑氧化锌,开展了锌浸出条件试验,考察了浸出液净化条件,并回收有价金属铟的研究。结果表明,在锌浸出时,在液固比5∶1、浸出时间3 h、氯化铵和氨的摩尔比为2、浸出温度45℃条件下,锌的浸出率达97%以上。浸出液净化时锌粉加入量宜为2 g/L,净化后液进入锌电积工序。氨浸渣经硫酸浸出后,萃取相比为4∶1、反萃相比为20∶1,铟萃取率高达99.87%。     

含铟铅烟尘提铟试验研究

通过对含铟铅烟尘性质和特点的研究分析,制定了二段硫酸浸出、P204萃取、硫酸洗涤、盐酸反萃、锌粉置换的提铟工艺流程。试验结果表明,初始浸出酸度200.gL-1、氧化剂用量1.25%、浸出温度95℃、浓酸浸出时间5 h、稀酸酸浸出时间2 h条件下铟浸出率91.5%;萃取剂P204浓度15%,相比O/A=1/15,萃取时间5 m in条件下萃取率98%;6N盐酸作为反萃剂,三级逆流反萃取反萃率100%;铟富集液锌粉置换,置换率大于99.7%。     

从含铟硫酸钙渣中回收铟

对高铁闪锌矿湿法炼锌过程中产出的含铟硫酸钙渣开展了一段酸浸—浸出液铁粉还原—还原液净化预处理—萃取—反萃试验研究,实现了铟与其他杂质元素的分离与高效回收。含铟硫酸钙渣在终酸70g/L、温度80℃、液固比4∶1、时间2h的条件下进行一段酸浸,铟浸出率98%以上;用铁粉将浸出液中的Fe~(3+)还原为Fe~(2+),铁粉过量系数1.5,Fe~(3+)还原率在98%以上;添加8g/L的活性炭对还原液进行净化预处理;用30%的P204在酸度70g/L、相比A/O=4∶1、混合时间3min、温度45℃的条件下对净化液进行四级逆流萃取,铟萃取率达到97.5%以上,萃余液含铟小于4mg/L;负载有机相用6mol/L的盐酸,相比A/O=1∶12,经过四级连续反萃,反萃液铟浓度可富集至70g/L以上。     

复杂稀有金属伴生矿富集渣提取稀土和铌的工艺研究

研究了从复杂稀有金属伴生矿富集渣中提取稀土和铌的工艺。结果表明,采用硫酸酸化-分段浸出工艺可实现富集渣中稀土和铌的高效浸出。在酸矿质量比1.8、酸化温度350℃、酸化时间120min、一段浸出液固比1∶1、浸出温度80℃、浸出时间90min、二段浸出液固比8∶1、浸出温度25℃、浸出时间90min的条件下,浸出渣中REO含量为0.96%,Nb2O5含量为0.75%,稀土浸出率为85.03%,铌浸出率为80.88%。其中铌一段浸出率为80.26%,稀土二段浸出率为83.85%,可通过分别处理一段浸出液和二段浸出液实现铌和稀土的回收。     

从含铟氧化锌烟尘中回收铟

采用中性和酸性两步浸出、萃取与反萃、置换工艺流程从含铟氧化锌烟尘中制备海绵铟,考察中性浸出的初始酸度和氧化剂用量、酸性浸出的浸出酸度和时间等对锌和铟浸出的影响。结果表明,在最佳条件下,铟和锌浸出率分别为90.60%和89.28%。浸出液经过萃取、反萃取、锌粉置换得到海绵铟,其中三级逆流萃取率99.80%、三级逆流反萃率99.90%、置换率99.50%。     

从硬锌渣中综合回收锌铟锡试验研究

针对火法炼锌过程中产出的硬锌渣,研究了中性浸出锌—浓硫酸熟化水浸铟—碱浸锡,考察了物料粒度、液固体积质量比、体系酸度对锌、铟、锡浸出率的影响。结果表明:在硬锌渣粒度小于200目、液固体积质量比4∶1、反应终点pH为5.0~5.5、反应时间2h、室温、中性浸出条件下,锌浸出率为93%;在反应温度85℃、液固体积质量比8∶1、体系酸度100g/L、反应时间4h条件下进行浓硫酸熟化浸出,铟浸出率达99.7%;在反应温度为室温、氢氧化钠浓度为2mol/L、液固体积质量比3∶1、反应时间2h条件下进行碱浸,锡浸出率达97%。锌、铟、锡得到较好回收。     

铟冶炼中间废渣回收铟的工艺研究与应用

本文介绍了关于综合回收铟冶炼过程中产生的几种废渣的工艺方法。通过对废渣水洗除氯、液固分离、除氯渣稀硫酸低酸浸出;浸出液根据不同金属化学电位不同的原理,使用与铟电位接近的还原铁粉净化除杂并液固分离;除杂溶液调整ph值水解富铟并分离二价铁,同时收铁;富铟渣用稀硫酸浸出后,使用铝板或锌粉置换回收海绵铟,置换后液调整ph值水解回收铝等系列生产步骤,废渣中铟总回收率达99%。同时,所用辅料铁铝分步回收,生产过程不产生废弃渣,生产工艺有很大推广价值。     

电解废液与锌冶炼烟尘协同处理试验研究

为综合回收锌冶炼烟尘及电解废液中的有价金属,本研究进行了利用锌电解废液浸出锌冶炼烟尘试验,通过一段浸出、碳酸钠中和沉锌及氢氧化钠中和沉镁等工序获得了沉锌产品和沉镁产品,通过两段浸出、萃取反萃、中和沉铟等工序获得了富铟渣及副产物铅银渣。试验最佳工艺条件：一段浸出为液固比4∶1,浸出温度80℃,浸出时间75 min,在此条件下,锌浸出率可达78.69%,铟浸出率仅为8.4%;锌镁分离最佳终点pH值区间为6.86～7.80;二段浸出最佳工艺条件为终点pH值1.08,液固比3∶1,浸出温度75℃,浸出时间10 h,在此条件下,铟浸出率可达86.84%。该研究可为炼锌厂开路除杂及综合回收有价金属提供新思路。     

硫酸浸出瓦斯灰中铟的试验研究

理论上分析了从瓦斯灰中浸出铟的可行性。试验采用硫酸浸出瓦斯灰提取铟。结果表明,在初始硫酸浓度为1m／L,固液比1：5,浸出温度80℃,浸出时间2h,高速搅拌条件下,铟浸取回收率15．31％。     

Chinalco Signed Framework Agreement for Strategic Cooperation with Harbin Municipal Government

正Last month,Chinalco signed framework agreement for strategic cooperation with Harbin Municipal Government in Harbin Xiong Weiping,Chairman of Chinalco,said that based on the strategic deployment to build world top-class mining company with the highest growth potential,Chinalco was now concentrating all efforts on making strategic transition and structural adjustment,strategic cooperation with the local governments where     

Jiangxi Promotes Jiangxi Copper Corporation To Become The World's Most Competitive Mining Company

<正>According to the latest info from Jiangxi Province State-owned Assets Supervision and Administration Commission,Jiangxi Copper Corporation was approved to become the first pilot enterprise for deepening reform.Contents of the pilot work is"Three Self"(self expansion,self decision-making,self     

Journal of Rare Earths Contents List of Vol.32(2014)

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Contributions to Baosteel Technical Research wanted

正Baosteel Technical Research,a quarterly journal,which is issued domestically and abroad,is run and sponsored by Baosteel Group Corporation.Baosteel Technical Research mainly reports the achievements in technological innovation,academic research,new product development and industrial equipment improvement by Baosteel.It will continue to follow up on hot topics and serve the company’s technological development and progress.Its readers include experts in     

Ministry of Industry and Information Technology: No Short Term Solution For Our Country’s Excess Nonferrous Metal Smelting Capacity

【正】According to the Ministry of Industry and Information Technology,the Ministry has released the 2013 Operation Report on China’s Industrial Communication Indu...     

Chinalco Signed Framework Agreement for Strategic Cooperation with Gansu Province

正Recently,Chinalco and Gansu Provincial People’s Government signed"Framework Agreement for Strategic Cooperation on Reform,Restructuring and Transition Development of Chinalco’s Electrolytic Aluminum Enterprises in Gansu",signifying that the strategic cooperation between Chinalco and Gansu Province had made new substantive progress.     

Unavoidable Economic Cycle:30% Of Nonferrous Metal Companies Were Involved In Restructuring

正Owing to continual downturn in real estate and bulk commodity markets,a number of traditional industries in China suffered unfavorable impact in performance.With the progressive disclosure of third quarter report,the no-pleasant-surprise performance of     

Baotou Rare Earth Became the World's Biggest High Performance Magnetic Material Base

正The High Performance Magnetic Material Phase II Project,an industry upgrading project implemented by Inner Mongolia Baotou IronSteel Rare Earth(Group)Hi-tech Co.,Ltd,recently basically finished equipment commissioning,signifying that the enterprise had developed the production capacity of15000 t/a Nd-Fe-B strip casting alloy and 5000t/a Nd-Fe-B magnet,thus becoming the world’s     

Introducing Two Central Enterprises to Integrate Rare Earth Industry,Shandong Rare Earth Group Breaks Surface

正With the signing of"Letter of intention for Propelling Integration of Shandong Rare Earth Enterprises"between Shandong Province Commission Of Economy and Informatization,China IronSteel Research Institute Group("China Steel Institute"),and China Rare MetalsRare Earth Co.,Ltd("China Rare Earth"),the"Shandong Rare Earth Group"jointly set up by the 3 units thus broke surface.On August 9,reporters of the China Economic Herald learned from Shandong Province     

Aluminium Production by Province or City in 2014

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