浸出-电沉积法从多金属低品位矿制备铜粉的研究

文章采用浸出-电沉积方法研究了多金属低品位氧化矿提取金属铜的工艺。探讨了工艺中温度、浸出时间、液固比（L／S）、硫酸浓度、矿样粒度、氧化剂等对铜的浸出率的影响。在硫酸浓度为10％,浸出时间控制在5h,液固比取5：1,浸出温度为95℃,粒度0．125mm以下占40％的最优条件下,得到铜的浸出率为82．2％。采用控制阴极电势电积法直接处理硫酸浸出液,在控制阴极电位小于500mV,铜离子的浓度为1～2g／L,H2S04为180g／L的条件下,得到铜含量在99％以上的优质海绵铜。     

含铅锌渣中铅的富集

提出低酸—高酸两段逆流浸出含铅锌渣新工艺,低酸浸出考察液固比、时间和温度对锌浸出率的影响,高酸浸出考察初始硫酸浓度、时间和温度对锌浸出率及铅品位的影响。结果表明,在低酸浸出,液固比6∶1、时间5h、温度60℃;高酸浸出,初始硫酸浓度170g/L、时间6h、温度95℃的最优条件下,锌浸出率99.29%,铅入渣率98.58%,高浸渣中铅品位62.25%。     

报废汽车高值元器件的氧化浸出试验

以报废汽车高值元器件废催化剂为原料,探讨了铂、钯、铑的浸出条件。分别研究了氧化浸出过程中盐酸浓度、时间、温度、氯酸钾百分比、固液比等对铂、铑、钯浸出率的影响。结果表明,较佳浸出工艺条件为:盐酸浓度9mol/L、反应时间2h、反应温度90℃、氯酸钾百分比5%、固液比0.20g/mL、搅拌速率400r/min,在上述工艺条件下,铂、钯、铑的浸出率分别为95.15%、96.44%、83.30%。     

用堆浸法从某选镍尾矿中回收镍的试验研究

某选镍尾矿镍品位为0.35%,其氧化率较高,属难选矿石。试验研究了采用碎磨-堆浸-沉淀工艺从尾矿中回收镍,考察了试料粒度、硫酸用量、浸出时间、浸出温度和液固比等对镍浸出率的影响,在矿石粒度-0.074 mm占65%、硫酸用量160 g/L、浸出时间56 h、浸出温度60℃、液固比3:1的条件下,镍的浸出率为61.11%。     

含铂钯铑的铁合金富集物溶解试验研究

以等离子熔炼失效汽车催化剂得到的含铂、钯和铑的铁合金富集物为原料,研究了液固比、浸出温度、浸出时间和氧化剂用量对铁合金中铂、钯和铑浸出率的影响。结果表明,最佳浸出条件为:盐酸浓度6mol/L、搅拌速度250r/min时、液固比10∶1、浸出温度80℃、浸出时间2h、氧化剂氯酸钠用量1∶1,铂、钯和铑的浸出率分别为57.29%、62.12%和25.35%。     

从废镍催化剂中酸浸镍试验研究

对比研究了硫酸、硝酸、盐酸从含镍废催化剂中浸出镍,考察了酸质量浓度、固液质量体积比、浸出时间、浸出温度对镍浸出率的影响,以及溶液pH对镍损失率和杂质去除率的影响。结果表明:与硝酸和盐酸相比,硫酸更适合作为镍浸出剂。在硫酸质量浓度364.5 g/L、固液质量体积比1∶6、浸出时间1 h、浸出温度60℃条件下,镍浸出率为94.6%,浸出效果较好。     

木薯渣—硫酸法浸出低品位软锰矿试验研究

研究了用木薯渣─硫酸法浸出低品位软锰矿,即以木薯渣作还原剂,在硫酸溶液中浸出低品位软锰矿。通过正交试验,考察了硫酸初始质量浓度、温度、固液质量体积比和反应时间对锰浸出效果的影响。结果表明,对锰浸出率影响较大的依次为温度、硫酸初始质量浓度、反应时间和固液质量体积比。单因素试验结果表明:锰浸出率随温度升高、硫酸初始质量浓度增大、反应时间延长和木薯渣添加量增加而提高;在温度90℃、硫酸初始质量浓度200g/L、反应时间4h、固液质量体积比1∶15、木薯渣与软锰矿质量比1∶6.79条件下,锰浸出率达97.32%。     

复杂硅酸盐矿物中钪的浸出实验研究

以硅酸盐类含钪矿物为原料,分别用盐酸和硫酸为浸出剂,采用酸浸法对硅酸盐矿物进行了钪的浸出实验,探讨了酸的种类、酸的浓度、酸浸温度、酸浸时间以及固液比对钪的浸出率的影响。实验结果表明,盐酸为浸出剂时钪的浸出率最高可达89.4%,最佳工艺条件是:盐酸浓度15%(质量分数),酸浸温度80℃,酸浸时间10 h,固液比为1∶5;硫酸为浸出剂时钪的浸出率最高可达98.3%,最佳工艺条件是:硫酸浓度35%(质量分数),酸浸温度90℃,酸浸时间12 h,固液比1∶7。     

氧化还原-盐酸浸出钛铁矿制备富钛料工艺研究

采用氧化还原-盐酸常压搅拌浸出法对钛铁矿进行选择性浸出,研究了氧化还原预处理对钛铁矿粒度、结构、表面形貌的影响,并考察了不同浸出条件对钛铁矿中Fe、Ti浸出率及浸出渣中Ti O_2品位的影响。结果表明,钛铁矿经过氧化还原后颗粒表面粗糙程度增加,粒径有所增大。采用1 000℃氧化1 h,800℃H2还原1 h的改性矿浸出,优化浸出条件为:液固比5∶1,盐酸浓度4 mol/L,反应温度90℃,浸出时间5 h。优化条件下Fe和Ti的浸出率分别为93.89%和3.28%,最终获得Ti O_2品位87.51%的富钛料,同时很好地保持了原矿的粒度。     

铜阳极泥氧压酸浸预处理工艺研究

研究某铜阳极泥氧压酸浸工艺条件,考察硫酸初始浓度、温度、时间、液固比、压力等对金属浸出的影响。结果表明,当控制浸出硫酸初始浓度130~150g/L、温度155~165℃、时间6~8h、液固比5∶1、压力1.0~1.5MPa时,酸浸渣率为55%~60%,碲浸出率为85%~90%,镍、铜浸出率均在99%以上。     

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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