二氧化硫氨浸及溶剂萃取钴壳

钴壳用二氧化硫气体作还原剂进行了氨浸,研究了浸出时间,浸出温度和碳酸铵浓度对镍、钴、铜、铁和锰浸出的影响,二氧化硫作还原剂,用碳酸铵溶液可实现从钴壳中选择性浸出镍,钴 和铜,在适当的浸出条件下,金属元素的浸出率分别为Ni90%,Co97%,Cu93%,Fe1.8%和Mn6.0%。使用溶剂萃取从碳酸铵溶液中分离镍、钴和铜,萃取试验用LIX－84作萃取剂,铜和镍的萃取率在99％以上,钴则在1．0％以下,钴的萃取被亚硫酸盐离子遮蔽,含有镍和铜的有机相用稀硫酸或盐酸在pH=1.7时反萃镍,pH=0时反萃铜。     

硫酸常压强化浸出红土镍矿新工艺研究

采用常压强化浸出红土镍矿,镍、钴浸出率可以提高到95%以上,且无废酸处理。浸出液进行两段除铁、铝得到铁渣;控制较高pH沉淀镍、锰获得纯净的硫酸镁溶液,再经浓缩、结晶、脱水制取无水硫酸镁。采用硫磺作还原剂,在真空回转窑内800℃常压热分解无水硫酸镁得到二氧化硫和活性氧化镁,二氧化硫制酸后用于浸出红土镍矿,一部分活性氧化镁作除铁铝和沉镍锰的中和剂,另一部分外销。     

以过氧化氢和亚硫酸钠作还原剂的富钴结壳盐酸浸出

用过氧化氢和亚硫酸钠作还原剂,在盐酸溶液中进行富钴结壳浸出,通过对钴、镍、铜、锰和铁的浸出进行试验研究,得到下列结论。①一般认为Ｃｏ主要存在于氧化锰相中,不用还原剂而只用盐酸浸出时,在接近室温条件下,为了得到钴的高浸出率,就必须使用浓度为３．０ｍｏｌ／ｄｍ３以上的盐酸溶液来破坏氧化锰相。对于镍,也和钴一样,为了得到高的浸出率,必须用高浓度盐酸。另一方面,可以认为,铜和其它金属的存在形态不同,所以与其它金属相比,即使是低浓度盐酸溶液,也能得到高的浸出率。②Ｃｏ,Ｎｉ,Ｍｎ和Ｆｅ的浸出率随着浸出温度…     

失效锂离子电池直接空气氧化氨性浸出研究

采用含氨和铵盐(硫酸铵、碳酸铵或氯化铵)的水溶液为浸出介质,在常温下通入空气直接浸出失效锂离子电池中的金属元素。在含铵盐的氨性溶液中,锂、钴的浸出率分别为小于22.4%、12.5%,而铜的浸出率可高达98.86%,有利于铜与锂、钴元素的分离。结果表明,含碳酸铵的氨性溶液浸铜效果最佳。     

富钴结壳湿法冶金工艺中硫化渣的加压浸出

富钴结壳活化硫酸浸出液经过中和除铁、硫化沉淀后得到的渣采用加压浸出工艺处理,考察了温度、压力、酸度、液固比等因素对加压浸出过程的影响,确定了加压浸出条件,此时镍、钴的浸出率大于99.8%,铜的浸出率大于98%,加压浸出得到的镍、钴、铜混合溶液可进一步萃取分离得到纯净的金属溶液。     

赞比亚某铜钴矿金属回收试验研究

赞比亚地区铜钴矿资源品位较低,铜钴赋存状态复杂,浸出和回收技术不成熟。某冶炼厂对此地区铜钴矿采用"浸出-萃取-净化-沉钴"工艺生产粗制氢氧化钴,浸出工段在生产过程中水量过剩,在净化工段前,萃余液中钴难以富集,造成资源浪费。本文采用酸浸还原-Lix984萃取-HBL110萃取工艺对此铜钴矿进行了试验,取得了满意效果:采用还原剂双氧水与亚硫酸钠联合法进行酸浸还原,钴、铜浸出率分别为98.27%、98.59%;采用萃取剂Lix984萃取回收铜,三级逆流萃取铜萃取率为99.13%,钴的萃取率为7.12%,实现了铜和钴分离的目的;萃铜后的萃余液主要含Co和Fe,采用双氧水对萃余液预处理,再采用萃取剂HBL110萃取钴,钴的萃取率达到99%以上,除铁率也从64.37%提升至86.15%。     

从废高温镍钴合金中浸出镍和钴的试验研究

研究了采用"苏打焙烧-碱浸出铝、钼-氯气浸出钴、镍、铁等-TBP萃取除铁-中和水解除铬-P204萃取除微量杂质-N235萃取分离镍、钴"工艺处理废高温镍钴合金,重点考察了从废镍钴合金中浸出镍和钴,讨论了苏打焙烧温度和碱浓度对铝、钼浸出率的影响,碱浸渣氯气浸出电位、浸出时间、废合金粒度、添加剂的加入等因素对镍、钴浸出率的影响.试验确定了从废高温镍钴合金中浸出镍、钴的工艺优化条件.综合条件下,镍、钴平均浸出率分别为99.30%和97.67%,浸出渣中镍、钴质量分数平均为0.51%和0.44%.     

酸洗—还原浸出法从镍钴净化渣料中回收镍钴

采用酸洗—还原酸浸工艺回收某冶炼厂净化渣中的镍钴。重点讨论了酸洗终点pH和还原浸出过程中酸浓度、温度及时间、终点pH、液固比、还原剂用量对镍钴浸出率的影响。结果表明,酸洗在终点pH=2.5的条件下,镍的浸出率为78.1%,而钴的浸出率极低。当还原酸浸出工艺在液固比10:1、酸浓度1.5mol/L、时间3.0h、温度60℃、还原剂用量1.0 mL/g的条件下,镍和钴的浸出率分别达到98.3%和97.5%。     

复杂铜钴矿浸出溶液处理试验

以复杂铜钴矿浸出溶液为原料,采用M5774萃取铜,硫酸反萃,铜的萃取率和反萃率均大于99%,萃余液用SO_2/空气混合气氧化中和除铁、锰,除铁后液铁和铝均小于0.005g/L,锰没有完全除掉,采用活性氧化镁沉淀镍和钴,在较优条件下,镍、钴沉淀率分别为97.73%和94.33%,用活性氧化钙沉淀锰和镁。     

大洋多金属结核氨浸工艺影响因素研究

在低温水溶液条件下,以亚铜离子为催化剂,一氧化碳为还原剂,在氨性体系中,对日处理10 kg大洋多金属结核扩大试验的浸出行为影响因素进行研究。试验考察了浸出体系电位、金属离子浓度、温度、液固比等因素对有价金属浸出率的影响。结果表明,控制浸出体系的电位对维持较快的反应速度和较高的金属浸出率十分重要;溶液中的钴离子浓度对钴浸出率影响较大,随着溶液中钴离子浓度的增加,钴浸出率下降,镍离子浓度对镍浸出率的影响很小;液固比对镍、钴、铜浸出率的影响不显著;温度对有价金属浸出率有一定影响,最好控制在40~50℃。     

熔炼次数对M17返回料合金成分、组织和性能的影响

实验结果表明,M17铸造高温合金(%:0.16C、8.79Cr、5.79A1、4.93Ti、3.29Mo、15.20Co、0.78V、0.015B、0.073Zr、0.002S、0.001P、0.001 1O、0.001 0N)经25 kg真空感应炉返回重熔后,Si含量随重熔次数的增加而略有增加,合金中主要元素和其它杂质元素S、P、H的含量变化不大,而氧、氮略有增加;合金中初生碳化物由新合金中的草书体逐渐向返回合金块状转变,初生碳化物的遗传性堵塞合金凝固时的补缩通道,使返回料合金的疏松倾向增大,高温塑性下降较大。     

Shijiazhuang will Build the World's Biggest Replacingcopper-with-aluminum Cable Production Base

正Shijiazhuang City will build the world’s biggest replacing-copper-with-aluminum cable production base,the annual output value can reach 100 billion yuan,in the future it will develop replacing-copper-with-aluminum highend industry cluster.This piece of news was learned by the reporter at the Rare Earth highiron Aluminum Alloy[Nonferrous Business Opportunity:Aluminum alloy door]Cable Conductor New Technology Application Seminar held at the provincial capital.     

Chongqing is Preparing to Set Up Nonferrous Metal Exchange,in a Bid to Become the Transit Place of Kazakhstan Copper

正Since the beginning of Chongqing’s upgrading to a municipality directly under the Central Government,Chongqing City has established direct friendly relationship with Almaty,Kazakhstan,and carried out a series of cooperation in commerce and trade,and culture     

Guangxi Baise Extends Industrial Chain to Combat Loss in Aluminum Business

正"For each tonne of aluminum being produced,the upstream enterprise on the aluminum industrial chain will suffer loss about 2000yuan."Said Liang Xiao,Deputy Director of Pingguo Industrial Park Management Committee under the Guangxi Baise City,one of the four major aluminum industry bases in China,on August 11.Extending aluminum     

JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL ANNUAL CONTENTS Volume 21(2014)

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Chinalco Straightened Out Copper Assets,and Delegated Stock Equity of Yunnan Copper

正Immediately after the news that Chinalco transferred 58%stock equity of Yunnan Copper Group to its wholly-owned subsidiary China Copper Corporation Limited free of charge was disclosed on July 9,many individual investors couldn’t help but to think:Does it mean China Copper Corporation Limited will assemble assets for overall listing?At present,among main copper business companies under China Copper Corporation     

The Development and Reform Commission Encourages Private Capital to Enter Geological Prospecting Field

正At the press conference recently held by the National Development and Reform Commission under the theme"Deepen Reform in Investment AuditApproval System",when answering questions from reporters,Huang Min,Director of the Department of Fixed Assets Investment of the National Development and Reform Commission,said that in the future it would continue to intensify efforts in geological prospecting,and actively guide social capital to enter this field.     

Guangxi's first Nickel Industry Development Research Report Was Released

正Recently,Guangxi Metallurgical Research Institute,a subsidiary of Guangxi Nonferrous Metals Group,completed survey on laterite and related manufacturers in the region,by combining the current development status of laterite both at home and abroad,it compiled Guangxi’s first"Research Report on the Development of Guangxi Nickel Industrial Chain"which adopted laterite as the study subject.This report expounded on the current     

China’s Major Non-ferrous Metals Imports & Exports(End of September. 2014)

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China's Major Non-ferrous Metals Imports & Exports

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