氧化锌烟尘中铟锗的分离回收工艺

采用火法烟化挥发法处理湿法炼锌、火法炼铅渣后产生的氧化锌烟尘主要含锌、铁,还含有铟、锗等一种或多种稀有金属,具有较高的回收价值。常规处理氧化锌烟尘采用两段酸浸工艺处理,通常只能针对其中一种稀有金属进行单一回收,不能满足目前企业的原料变化和冶炼要求。以含铟、锗的氧化锌烟尘为原料,利用铟、锗浸出特性的不同,通过调控反应过程的酸度,分步浸出铟、锗,并通过铟、锗萃取特性的不同,进一步分离回收铟、锗,从而实现氧化锌烟尘中铟、锗的分离提取。结果表明,经三段中浸—低酸浸—高酸浸强化浸出,中浸液中铟含量在2 mg/L左右,锗含量在60 mg/L左右,可用于后续的沉淀回收锗;低酸浸出液的铟含量在280 mg/L左右,锗含量在70 mg/L左右,经过后续的中和沉淀,铟富集到10 075 g/t左右,中和渣进行浸出—萃取—电积得到精铟产品和含锗萃余液,萃余液返回中浸,达到了铟锗分离提取的目的,实现了对资源的综合利用。     

从含铟铅合金中回收铟

采用电溶-萃取工艺从铅铟合金中回收铟。结果表明,在电流密度155 A/m2、电解周期24 h、电解前液含In 1.8g/L、室温、极距为4 cm的最优条件下,金属铟的溶出率达到94.28%;采用P204从氟硅酸电解液中非平衡萃取提取铟,在有机相组成为30%P204+70%磺化煤油、萃取级数为3级、相比VO∶VA=1∶3的条件下,金属铟的萃取率达到98.69%。负载有机相采用6 mol/L的盐酸反萃,在VO∶VA=6∶1、级数为6级的条件下,反萃率接近100%,同时实现了与杂质元素Zn、Fe、Sn的分离。     

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%。     

从锗氯化蒸馏残液中回收铟

本文论述从锗氯化蒸馏残液中回收铟的工艺,通过片碱中和、硫酸浸出、铁粉还原、二(2—乙基己基)磷酸(P204)萃取、反萃液除杂、铝板置换、碱煮熔炼等工序,得到含铟大于99%的粗铟产品。     

提高铟工艺回收率探讨

文章描述了某企业目前从铟富集渣回收铟的工艺流程,并针对原料的变化进行了工艺研究,对铟浸出、浸出液净化、萃取、反萃液净化等进行了试验,根据试验结果进行了工业化试验,取得了较为明显的效果,回收率由80％提高到了85％,系统产能由每年50t提高到66t。     

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%。     

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%。     

锌焙砂热酸浸出液还原-中和沉铟的工艺试验研究

针对高铁高铟锌焙砂的热酸浸出液,进行了还原-中和沉铟工艺条件试验研究,确定了最佳工艺条件,其中还原过程:硫化锌精矿过量系数1.3,酸度60 g/L,反应温度90℃,反应时间4 h,还原后液Fe3+浓度小于1.0 g/L;中和沉铟过程:反应pH4.0,反应温度60℃,反应时间30 min,采用该条件,在浸出液中铟含量0.15 mg/L情况下,铁还原率93.81%,中和沉铟率99.80%,渣含铟0.36%。采用还原-中和沉铟工艺,既可有效回收铟,又利于下一步针铁矿沉铁。     

完善铟冶炼工艺提升粗铟质量的探讨

文章介绍了在铟的生产过程,通过对富集渣进行中性浸出除Zn、Cd、Fe,料液加铁粉净化除Bi、Cu、Pb、Sn、As、Sb,反萃液中水解沉淀净化除Bi、sn和加铟片置换净化除Bi、Sn,粗铟真空蒸馏除Cd,降低了粗铟杂质含量,提高了粗铟质量。     

从铜闪速炉烟灰酸浸液中用P204萃取回收铟的研究

研究了萃取剂浓度、料液酸度、萃取时间等因素对铟萃取率的影响;反萃液酸度与反萃时间对反萃铟的影响.结果表明,料液酸度为0.8 mol/L、有机相组成为30％ P204+70％磺化煤油、油水相比O/A=1:5、混合5 min时,In3+的单级萃取率为96.8％;用4.0 mol/L的HC1反萃10 min,铟的反萃率为94.9％.     

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

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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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Refined Copper Production by Province or City in 2014

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Aluminium Production by Province or City in 2014

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China is Planning to Raise rare Earth Resource Tax Again

正In the face of the current situation of the lost WTO dispute on rare earth,and cancellation of export tariff for partial rare earth products,efforts of regulation and integration on rare earth by the state government will again be tightened.Reporters of the Economic Information Daily recently learned from authoritative sources that relevant ministries are     

Fabricated Copper Production by Province or City in 2014

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Refined Copper Production by Province or City in 2014

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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     

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