用氯化焙烧—水浸工艺从钨尾矿中提取有价金属铷锂钾

研究了采用氯化焙烧—水浸工艺从钨尾矿中提取铷、锂和钾。考察了尾矿粒度、氯化剂种类及用量、尾矿焙烧温度和时间及水浸液固质量比和温度对铷、锂、钾回收率的影响。试验结果表明:对粒度为-0.5 mm占95%的尾矿,在CaCl_2、NaCl和尾矿质量配比为3∶3∶10条件下于950℃下焙烧2 h,所得高温焙砂与纯水按液固质量比2∶1混合浸出2 h,铷、锂、钾浸出率分别为87.6%、75.9%和75.6%,浸出效果较好。     

采用焙烧—水浸工艺从某多金属矿石中提取铷铯

研究了采用焙烧—水浸工艺从某多金属云母精矿中浸出铷和铯,考察了助剂种类、助剂用量、原料配比、精矿粒度、煅烧温度、浸出液固质量比等对铷、铯浸出率的影响,确定了较优工艺条件。试验结果表明:以氯化钙为氯化剂,添加量为精矿质量的75%,混合后在850℃下焙烧1h,烧结产物常温下用水浸出,控制液固质量比为4∶1,搅拌浸出1h,铷、铯浸出率均在92%以上。     

低品位铷矿浸出试验

采用氯化焙烧—浸出法从某低品位铷矿中提取铷。结果表明:在添加剂用量为矿石质量的40%、焙烧温度900℃、焙烧时间1.5h、水浸温度50℃、浸出液固比21的条件下,铷浸出率为87.12%。     

从锌浸出渣中湿法回收锌

研究了采用硫酸焙烧—水浸出工艺从锌浸出渣中回收锌。考察了硫酸用量、焙烧时间、焙烧温度、液固体积质量比及浸出时间对锌浸出率的影响。试验结果表明:锌浸出渣与70%浓硫酸混合,在250℃下焙烧2.5h,然后以水为浸出剂,按液固体积质量比4∶1、常温下浸出1h,锌浸出率达85%以上。     

氯化焙烧—水浸从锂云母精矿中提锂试验

采用氯化焙烧—水浸的方法从某Li₂O品位为3.23%的锂云母浮选精矿中回收锂,考察了焙烧过程中氯化剂用量、焙烧温度、焙烧时间,浸出过程中液固比、浸出温度、浸出时间对Li₂O浸出率的影响。结果表明:在CaCl₂用量为锂云母精矿质量的3/4,焙烧温度900℃,焙烧时间40min,焙烧渣在液固比3∶1,室温浸出40min的条件下,Li2O浸出率可达到95.36%,回收效果较好。     

某铷矿浸出工艺研究

对某铷矿进行多种浸出工艺探索研究。研究表明,氯化钠、氯化钙混合焙烧—水浸工艺效果最好。在原矿∶氯化钙∶氯化钠=1∶0.3∶0.2、焙烧温度900℃、焙烧时间1h、水浸温度90℃、浸出时间2h的条件下,铷浸出率为93.81%。     

从钨渣中浸出氧化钪的试验研究

研究了采用硫酸化焙烧—水浸工艺从钨渣中回收钪,考察了硫酸用量、焙烧温度、焙烧时间、水浸温度、水浸时间、水浸液固体积质量比对钪、钨、锰、铁、硅浸出的影响。试验结果表明:最佳条件(硫酸浓度3.5mol/L,焙烧温度200℃,焙烧时间2h,水浸温度90℃,水浸时间1h,水浸液固体积质量比5∶1)下,氧化钪浸出率达93%以上;工艺简单适用。     

采用氯化焙烧从含铷矿物中提铷试验研究

介绍了广西某地区铷矿采用氯化焙烧提铷的方法.通过对添加剂用量、焙烧温度、焙烧时间和磨矿粒度等工艺参数进行研究表明:在物料颗粒小于0.05 mm占95％以上,加入30％ CaCl2和20％ NaCl混匀,制粒、烘干,焙烧温度900℃,焙烧时间1h,液固比2:1,常温水浸1h的条件下,铷浸出率可达93％以上.     

硫酸化氧化焙烧—水浸法从红土镍矿中提取镍钴

采用硫酸化氧化焙烧—水浸工艺从高铁低镁的红土镍矿中提取镍、钴,主要研究了硫酸用量、酸化氧化焙烧温度和时间、水浸时间、水浸液固比等因素对镍、钴浸出率的影响。结果表明,最佳工艺条件为:矿石粒度-1mm,按酸料比0.54在300℃焙烧1h再升至800℃焙烧2h,水浸液固比3∶1,水浸温度70℃,水浸时间2h,此时镍、钴浸出率分别达到91.00%和91.51%,铁浸出率仅为2.72%。     

常压硫酸焙烧法提取镍磷铁中的镍

采用硫酸化焙烧再水浸的方法从钙镁磷肥的副产物镍磷铁中提取镍,重点研究了提镍过程中相关因素对镍浸出率的影响。结果表明,在酸料比0.5、焙烧温度300℃、焙烧时间3h、水浸液固比7∶1、水浸温度70℃、水浸时间2.5h的条件下,浸出效果最好,浸出液中镍浸出率达到73.43%。     

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     

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     

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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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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Aluminium 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     

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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