硅-锗合金废料中锗的回收研究

研究了硅-锗合金废料中锗的回收,采用碳酸钠+Na2O2熔融-磷酸中和-盐酸蒸馏法,并对工艺进行了优化。该工艺具有回收率高、成本低、环境友好等优点。     

热酸浸出—铁矾法除铁湿法炼锌工艺中锗的回收

本文以含锗锌精矿为处理原料,从热酸浸出-铁矾法除铁湿法炼锌流程中回收锗时采用从沉矾后溶液中中和沉淀回收锗的方案是可行的。可用CaO或焙砂作中和剂.     

从含锗氧化锌烟尘中提取锌锗

以氧化锌烟尘为原料、硫酸为浸出剂,研究了含锗氧化锌烟尘的浸出过程。最佳工艺条件为:烟尘用量50g、硫酸用量20mL、反应温度80℃、反应时间2h、液固比41,在该条件下,锌、锗的浸出率分别为89.12%和89.75%。将浸出液的pH调至2.5,在沉淀温度60℃,搅拌时间30min的条件下,采用浸出液中锗量40倍的单宁酸进行沉锗,锗的沉淀率达97.2%,得到含锗0.809%的单宁渣,该沉淀渣在600℃灼烧1h后得到品位为14.55%的锗精矿。沉锗后液可返回锌生产。     

氧压酸浸炼锌流程中置换渣提取锗镓铟

为从锌精矿氧压酸浸炼锌工艺的置换渣中提取锗镓铟元素,对二段浸出-萃取分离锗镓铟铜工艺进行研究,锌电积废液用于一段浸出,H2SO4-HF混酸用于一段浸出渣的二段浸出;一段浸出液分别采用二(2-乙基已基)磷酸(P204),C3~5氧肟酸+二(2-乙基已基)(P204)磷酸及5-壬基水杨醛肟(CP150)分别萃取铟,锗镓及铜;二段浸出液用C3~5氧肟酸萃取提锗,萃余液加入氟化钠沉淀氟硅酸钠。试验结果显示,一段浸出用酸度为3.1 N的湿法炼锌电积废液,液固比4∶1,初始氧分压0.4 MPa,150℃,经3 h的二级浸出后,浸出渣率约为15%,铟镓铜锌4个元素的浸出率都达到98%,而锗浸出率约为80%;一段浸出残渣用H2SO4-HF混酸浸出,其氟/硅摩尔比4.2∶1.0,硫酸浓度为2 N温度80℃,液固比3∶1,浸出时间为5 h,一段浸出残渣中锗几乎完全浸出;一段浸出液在pH 2.0~2.2,30%二(2-乙基已基)磷酸萃取,部分铁与几乎所有的铟被萃取,用2 N盐酸反萃,铟、铁的反萃率分别为98.28%和2.79%,可达到铟铁的分离;萃铟余液用3%的氧肟酸+10%二(2-乙基已基)磷酸-煤油协萃锗、镓,铁也发生共萃,锗、镓和铁的单级萃取率均在90%以上,采用次氯酸钠反萃,锗反萃率近100%,且Ge/Ga和Ge/Fe的反萃分离系数分别为10836和318.7。用3 mol·L-1的硫酸,相比(W/O)1∶2反萃镓,镓的一次反萃率达97.5%。二段浸出液采用10%C3~5氧肟酸-煤油萃取,相比(O/W)为1.2∶1.0,锗的单级萃取率达到98.31%。经30%次氯酸钠溶液反萃,锗的一次反萃率达到98.83%,萃余液加入氟化钠,氟硅化物的沉淀率为90%左右。沉硅滤液经补充氢氟酸后返回二段沉出,锗的浸出仍可达到较完全的浸出。该工艺无废液排放,并且通过与湿法炼锌流程的物料交换而变得简化。     

含锗氧化锌烟尘综合回收锗锌工艺

针对某厂含锗氧化锌烟尘锗含量较高的特性,研究拟定了酸浸一丹宁沉锗－净化－碳铵沉锌的工艺生产锗精矿与碱式碳酸锌产品,经生产验证,此法具有流程短、易操作,收率高,产品质量好等优点,能合理有效地综合回收烟尘中的锗锌等有价金属。     

ICP-AES法同时测定锌精矿、锗渣中的镓铟锗

采用硝酸和氟化铵溶解样品,用ICP-AES(电感耦合等离子体-原子发射光谱法)同时测定锌精矿、锗渣等物料中的镓铟锗。对不同的溶样方法进行比较,确立最佳样品处理方案,对基体及主要杂质元素对镓、铟、锗测定的干扰情况及消除方法进行试验,优化分析方法。该方法简单、快速、准确,测定结果与国标方法一致,相对标准偏差(n=7)小于3.5%,加标回收率为99.56%~100.39%,线性相关系数均大于0.999 9。     

高锗锌原料湿法冶炼的实践

分析了锗在湿法炼锌浸出一净化过程中的行为，并通过实践确定了高锗锌原料湿法处理的工艺条件。介绍了存在的问题和解决措施。     

高锗锌原料湿法冶炼的实践

分析了锗在湿法炼锌浸出—净化过程中的行为,并通过实践确定了高锗锌原料湿法处理的工艺条件,介绍了存在的问题和解决措施。     

从湿法炼锌中回收锗的生产实践

对原有的锗回收生产工艺作了两个改进:一是用NaOH取代氨水作反锗剂,二是改连续补充YW-100为间断补充,生产实践表明:这两个改进提高了锗的回收率,降低了生产成本,取得了明显的经济效益;改进后的萃取体系,基本上解决了原有工艺易发生乳化现象的技术难题,在零度以下的低温季节仍能稳定运转。     

碘化钾-四丁基溴化铵-水体系浮选分离锗

研究了碘化钾-四丁基溴化铵-水体系浮选分离锗的行为及与一些金属离子分离的条件。结果表明, 在水溶液中, 锗与碘化钾和四丁基溴化铵形成不溶于水的三元缔合物[GeI₆^2-][ TBAB⁺]₂, 此三元缔合物浮于水相上层形成界面清晰的液-固两相。当溶液中四丁基溴化铵和碘化钾的浓度分别为9.0×10^-4 mol/L和3.0×10^-2 mol/L, pH值为2时, 锗可与Ce、Cr、Ni、Mg、Fe、Zn、Sn、Zr、V、Co、Mo、Mn、Al、W、Ga、Rh、U、La 和Ti定量分离。采用方法对合成水样中锗进行分离和测定, 锗的浮选率为97.8%~100%。     

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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