硫氰酸盐—铁(Ⅲ)体系从废电路板中选择性浸出金银

采用硫氰酸盐法从硫酸双氧水体系预处理废电路板金属部分后的渣中选择性浸出金银,并对硫氰酸盐浓度、铁离子浓度、溶液pH、液固比、搅拌速度、温度、浸出时间等因素进行优化。结果表明,在0.1mol/L Fe3+、0.6mol/L SCN-、pH=2、液固比500∶2、搅拌速度200r/min、温度15℃、浸出8h的条件下,金银浸出率分别达到95%和99%,铅浸出率不超过4.5%。     

某毒砂金矿硫氰酸盐氨性体系加压氧化提金探索试验

对某毒砂金矿进行了硫氰酸盐氨性体系氧压提取金的探索试验,考察了反应温度、Cu2+浓度、浸出时间、液固比、氨水浓度、氧分压和硫氰酸铵浓度等对金浸出率的影响。结果表明,在下述优化条件下金浸出率为61.7%,即硫氰酸铵浓度3mol/L,液固比5∶1,反应温度150℃,浸出时间6h,搅拌速度750r/min,氨水浓度4.64mo/L,铜加入量1.5g/L。而经400℃焙烧预处理后金浸出率达到86.2%。     

沸腾焙烧烟灰浸出金、银、铜的研究

采用酸浸—氰化工艺从某沸腾焙烧烟灰中浸出金、银、铜。结果表明,较优工艺为:酸浸硫酸浓度1.0mol/L,液固比4∶1,反应温度90℃,反应时间4h,搅拌速度300r/min;氰化浸出反应液固比3∶1,氰化钠浓度0.2%,pH 10~11,反应时间48h,搅拌速度300r/min。此条件下,金、银、铜的浸出率分别为97.16%、79.98%、96.04%。     

氰化法、硫代硫酸盐法、硫脲法浸出某难浸银精矿比较研究

对某浮选银精矿采用氰化法、硫代硫酸盐法、硫脲法进行银浸出实验,以评估3种不同浸出方法对该银精矿浸出效果．研究结果表明：在最优的工艺参数下[氰化法：碱预处理后加入铵盐,氰化钠浓度0.15 mol/L,pH值为11,液固比（浸出液体积与试样质量之比,单位是mL/g,下同）2∶1,搅拌强度500 r/min,浸出时间为48 h;硫代硫酸盐法：氧化焙烧预处理,氨水浓度1.0 mol/L,硫酸铜浓度0.01 mol/L,硫代硫酸钠浓度0.2 mol/L,pH值为10,液固比4∶1,搅拌强度500 r/min,浸出时间12 h;硫脲法：氧化焙烧和稀硫酸预浸处理,Fe3+浓度7.5×10-3 mol/L,硫脲浓度0.18 mol/L,pH=1.0,液固比为3∶1,搅拌速度250 r/min,浸出时间24 h],硫代硫酸盐方法获得的Ag浸出率为78.58%,硫脲相应获得的Ag浸出率为62.43%,比氰化法获得的浸出率低约3.33%．     

用硫氰酸盐从硫酸烧渣中浸出金银试验研究

研究了用硫氰酸盐从吸收二氧化硫废气后的硫酸烧渣中浸出金银,考察了硫氰酸盐用量、体系pH、液固体积质量比、浸出时间对金、银浸出率的影响。试验结果表明,在烧渣质量100g、硫氰酸钠10g、体系pH=2、液固体积质量比2∶1、常温下搅拌浸出4h条件下,金浸出率为82.6%,银浸出率为62.4%,浸出效果较好。     

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%。     

用硫酸从氧化铜矿石中浸出铜试验研究

研究了用硫酸从氧化铜矿石中浸出铜，考察了矿石粒径、硫酸浓度、浸出温度、浸出时间、双氧水添加量、搅拌速度和液固体积质量比对铜浸出率的影响。结果表明：在矿石粒径—74μm占80%,硫酸浓度2.5 mol/L、浸出温度60℃、浸出时间150 min、双氧水添加量100 mL/kg、搅拌速度100 r/min、液固体积质量比6∶1条件下，铜浸出率可达95.1%;浸出渣中仅有少量被脉石包裹的铜矿物未反应，其余大量铜矿物基本反应完全生成硫酸铜，浸出效果较好。     

从某沉积污泥中提取金、银试验研究

采用焙烧-酸浸-氰化工艺从沉积污泥中提取金、银,试验考察了氰化浸出反应液固比、pH值、氰化钠质量分数、反应时间、搅拌速度对金、银浸出率的影响。沉淀污泥在焙烧温度903K、焙烧时间2h的条件下,进行预处理;焙砂在反应液固比4：1、硫酸浓度0．5mol／L、反应时间3h、反应温度323K、搅拌速度300r／min的条件下,进行硫酸浸出;酸浸渣在反应液固比4：1、pH10．5、氰化钠质量分数0．4％、反应温度298K、搅拌速度250r／min、反应时间72h的条件下,进行氰化浸出;金、银浸出率分别可达93．2％、79．1％。     

低品位锰矿石在NH_4HSO_4/H_2O_2体系中的浸出行为

研究了以硫酸氢铵为浸出剂、双氧水为还原剂从低品位锰矿石中浸出锰,考察了液固体积质量比、硫酸氢铵浓度、双氧水浓度、浸出温度和浸出时间对锰、铁浸出效果的影响。结果表明:在液固体积质量比30/1、硫酸氢氨浓度0.5 mol/L、双氧水浓度0.2 mol/L、浸出温度50℃、浸出时间60 min条件下,锰浸出率达98.22%,铁浸出率仅有8.52%,浸出效果较好。     

富铼渣常压浸出工艺研究

采用双氧水常压氧化浸出富铼渣,考察液固比、双氧水用量、硫酸浓度、浸出温度和时间对铼浸出率的影响。结果表明,在液固比2∶1,双氧水体积为水2倍,硫酸浓度20g/L,室温下搅拌浸出2h的最优条件下,富铼渣中铼的综合平均浸出率达到96.52%。     

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