铜萃余液综合回收铜、锌试验研究

采用硫化沉淀工艺对铜萃余液中的铜、锌等有价金属进行了回收试验研究,考察了硫化沉淀pH值、硫化钠加入量和硫化反应时间等因素以及铜、锌共沉淀和分步沉淀对铜、锌回收率和精矿品位的影响。试验结果表明,铜、锌分步沉淀时,萃余液pH=2．5,加入1．2倍硫化钠用量,反应20min,沉铜效果最好,铜回收率98．33％,精矿铜品位38．88％;pH=3．5,加入1．4倍硫化钠用量,反应20min,沉锌效果最好,锌回收率为98．36％,精矿锌品位33．17％。该工艺可有效回收萃余液中的铜、锌等有价金属。、     

硫化氢在湿法炼锌铟萃余液净化除砷的应用研究

甘肃省某锌冶炼厂铟回收的萃余液含砷浓度高，采用中和沉淀法脱除砷容易造成有价金属大量锌的损失。本文结合了硫化氢在有色行业内废酸治理去除高浓度砷的应用优势，开展了硫化氢硫化法工艺脱除该企业铟萃余液中高浓度砷的试验研究，结果表明：硫化氢硫化工艺可以实现铟萃余液中砷的可控脱除，硫化氢通入量越多，砷去除效率越高，硫化氢通入量为理论用量1.15倍时，二段硫化出水砷浓度可控制低于0.05 g/L,砷去除率高达99.63%,同时可以减少企业生产过程的锌的损失的问题，且可以产生一定的经济效益，因此具有一定应用前景。     

铜再生烟灰浸出液净化试验

铜再生灰浸出液中含有Cu、Zn、Fe、Cd等多种有价金属。采用“Lix984+磺化煤油”有机相从铜再生灰浸出液中萃取分离铜,并采用中和除铁法对萃余液中的铁沉淀分离。探究了萃取级数、萃取相比O/A、萃取剂浓度、水相初始pH、萃取时间对Cu2+与其它金属离子萃取分离的影响,以及溶液pH、反应温度、反应时间对萃铜余液除铁过程的影响。萃铜试验优化条件为：萃取级数2级、萃取相比3︰4、萃取剂浓度15%、萃取时间2 min、萃取初始水相pH=1.5。除铁试验最佳参数为：中和终点pH=4.0、反应温度40 ℃、陈化时间1 h。在最佳条件下,Cu的萃取率为99.12%,与Zn、Cd、Fe的分离系数分别为1 317.9、1 178.7和651,实现Cu与其它金属的有效分离。萃铜余液除铁率达99.67%,除铁后液满足锌电解液对Fe浓度的要求。     

刚果（金）某低钴浓度铜萃余液除铁处理

研究了用中和沉淀法去除刚果(金)某低钴浓度铜萃余液中杂质铁过程。针对该铜萃余液中铁主要以三价离子形态存在的特点,通过对硫酸盐溶液中不同除铁方法的比较,结合刚果(金)当地的能源供应条件,选择中和沉淀法进行低钴浓度铜萃余液除铁处理。通过试验,重点考察中和除铁过程终点pH值、氧化钙调浆浓度、反应温度、反应时间等工艺参数对除铁效果及有价金属铜和钴损失的影响。试验结果表明,在氧化钙调浆浓度20%,终点pH值控制3.5,反应温度40℃,反应时间5h的条件下,铜萃余液中铁的去除率达到97.14%,铜、钴在除铁过程中的损失率分别为1.02%和0.66%。     

湿法炼锌净化钴渣酸浸液萃取除杂试验研究

湿法炼锌净化钴渣选择性浸出锌后浸出渣的酸浸液中杂质含量较高,影响钴的回收。研究了采用P204萃取剂从该酸浸液中去除锌、镉、铁等杂质,考察了酸浸液pH、P204体积分数、萃取时间、相比对萃取除杂效果的影响。结果表明:在酸浸液pH为3.5、P204体积分数为10%、相比(V_o/V_a)为1/1、萃取时间为15 min、4级萃取条件下,锌、镉、铁萃取率均超过97%,钴损失率不足5%,除杂效果较好,萃余液杂质含量低,可进一步回收钴。     

选择性沉淀法从堆浸液中分离回收铜镍

根据低品位堆浸液中杂质浓度高，而有价金属浓度低的实际情况，综合目前的一些处理技术，在大量试验的基础上提出了分步水解除铁，活性硫沉铜、硫化沉淀法沉镍的流程来回收分离铜镍。     

新技术与新成果

正2016012从废杂铜冶炼渣与铜加工酸洗废液中回收有价金属的工艺一种从废杂铜冶炼渣与铜加工酸洗废液中回收有价金属的工艺,其步骤包括:1.对废杂铜冶炼渣与铜加工酸洗废液混合进行酸性浸出,控制pH 1.8~2.2,得到酸性浸出液;2.对酸性浸出液进行铜萃取,实现铜与其它金属的分离;3.萃取后的萃余液再与废杂铜冶炼渣混合并添加硫酸,通入空气进行     

从铜转炉烟灰中回收铜锌试验研究

研究了从铜转炉烟灰中回收铜、锌等有价金属。试验结果表明:用稀硫酸浸出烟灰,最佳浸出条件为液固体积质量比5∶1,温度50℃,浸出时间2h,硫酸用量10g/100g烟灰;用Fe粉从浸出液中置换铜,最佳置换条件为过铁系数30%,反应温度40℃,反应时间1h;采用针铁矿法除铁,最佳条件为反应时间4h,反应温度90℃,pH=3;以碱式碳酸锌形式回收锌,锌回收率达98.8%。     

低品位次生硫化铜矿生物柱浸试验研究

采用铜萃余液从紫金山低品位次生硫化铜矿石中柱浸铜,研究了溶液pH、温度及铁质量浓度等因素对铜、铁浸出的影响。试验结果表明,生物浸出过程中,铜、铁的浸出行为存在差异,铜先于铁被快速浸出,浸出后期铜浸出率增幅较小,铁浸出率快速升高。推荐的既有利于铜浸出又相对抑制铁浸出的最佳条件为:浸出温度60℃,溶液pH 1.6~1.8,铁质量浓度2~5g/L。最佳条件下,铜浸出率达90%以上。也提出了工业生产工艺优化措施。     

综合回收废旧锂电池中有价金属的研究

研究了废旧锂电池芯粉中多种有价金属的回收工艺. 该工艺采用碱溶解铝-旋流分离铜-低液固比硫酸+双氧水浸出-水解净化-P507萃取-草酸沉钴-碳酸沉锂的流程, 优化了各单元步骤的操作参数, 钴、铜、铝、锂的回收率分别达到94%, 92%, 96%, 69.8%. 这种方法在浸出过程中使用酸量少, 溶剂可循环使用, 实现了多种有价金属的综合回收, 将为实现工业化综合回收废旧锂电池中有价金属提供依据.     

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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