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。     

从金冶炼渣中综合回收铁、金、银

研究了从某金冶炼厂金冶炼渣中回收铁、金、银。考察了硫酸浓度、浸出温度和浸出时间对铁浸出率的影响,以及液固体积质量比、浸出时间、氰化钠用量对金、银浸出率的影响。试验结果表明:在硫酸浓度10.8mol/L、浸出温度90℃、浸出时间2h、液固体积质量比2.5∶1条件下,金冶炼渣中铁浸出率为90.85%;在液固体积质量比3∶1、浸出时间48h、体系pH≈11、氰化钠用量10kg/t条件下,铁浸出尾渣中金、银浸出率分别为72.8%和62.4%。     

从高铁菱锰矿中酸浸锰铁试验研究

研究了用硫酸从贵州某高铁菱锰矿中浸出锰和铁,考察了酸浸时间、液固体积质量比、矿酸质量比、温度对锰和铁浸出率的影响。结果表明:在浸出温度70℃、浸出时间6h、液固体积质量比5∶1、矿酸质量比1∶0.6条件下,锰浸出率达96.78%,铁浸出率为43.15%。     

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。     

采用硫酸化焙烧—水浸工艺从锂云母精矿中提取锂

研究了采用硫酸化焙烧—水浸工艺从Li_2O品位3.23%的锂云母浮选精矿中回收锂,考察了焙烧过程中硫酸质量浓度、酸矿体积质量比、焙烧温度、焙烧时间,浸出过程中液固体积质量比、浸出温度、浸出时间对Li_2O浸出率的影响。结果表明:在硫酸质量浓度1 127 g/L、酸矿体积质量比1.5/1、焙烧温度150℃条件下焙烧12 h后,对焙烧渣在液固体积质量比3/1、室温下浸出40 min,Li_2O浸出率达98.39%,浸出效果较好。     

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。     

湿法富集铅冰铜中的贵金属

针对铅冰铜的物相组成,提出了加压酸浸除铜—碳化转化铅—硝酸浸出铅的全湿法富集贵金属工艺,考察了浸出压力、温度、时间、硫酸浓度、液固体积质量比对铜浸出率的影响以及铜浸出渣碳化转化—硝酸浸出铅的条件。结果表明:在氧气压力1.2MPa、浸出温度120℃、浸出时间3h、硫酸质量分数20%、液固体积质量比4∶1、搅拌转速250r/min的最佳条件下,铜浸出率为97.21%;在碳化温度50℃、碳酸氢铵用量为理论量的1.2倍、碳化时间1.5h、液固体积质量比4∶1、硝酸用量为理论量的1.1倍的最佳条件下,铅转化率在96%以上,铅浸出率为99.8%;铅冰铜中的贵金属得到富集,富集比达到3.5倍。该工艺可用于从铅冰铜中富集贵金属。     

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%。     

用盐酸从加碱焙烧粉煤灰中浸出钛

研究了采用加碱焙烧—盐酸浸出法从粉煤灰中浸出钛,考察了盐酸浓度、浸出温度、浸出时间、搅拌速度和液固体积质量比对钛浸出率的影响。试验结果表明:将粉煤灰与氢氧化钠按质量比1∶1混匀,在微波功率800 W下焙烧5min后再进行浸出,钛浸出效果更好;在盐酸浓度11.64mol/L、浸出温度88℃、浸出时间8h、搅拌速度1 200r/min、液固体积质量比9∶1条件下,钛浸出率为85.77%。     

从中浸渣中氧压酸浸锌、铁的试验研究

研究了从湿法炼锌中浸渣中氧压酸浸锌和铁,考察了氧压、中浸渣粒度、硫酸质量浓度、浸出时间、浸出温度、液固体积质量比、木质素磺酸钠加入量对锌、铁浸出率的影响.结果表明:在液固体积质量3∶1、始酸质量浓度140～150 g/L、浸出温度(150±5)℃、氧气压力0.8MPa、浸出时间80～90 min、木质素磺酸钠用量为渣量的0.15％的最佳条件下,锌浸出率达98％,铁浸出率为60.87％;降低浸出液终酸质量浓度及提高浸出温度可以使铁有效形成沉淀,抑制其浸出.     

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