含钌含铼高温合金电化学溶解工艺研究

采用电化学溶解法对某含钌含铼高温合金废料在盐酸电解体系中的溶解过程进行研究。考察了电流密度、电解液酸度、电解液镍离子浓度、温度、搅拌速率对电解过程的影响。结果表明,在阳极电流密度400A/m~2、盐酸浓度2mol/L、镍离子浓度100g/L以下、电解温度40℃、搅拌速率200r/min的条件下,合金中镍、钴的电化学溶解率可达60%以上,钨、钽、铼、钌等稀贵金属溶解率小于0.8%,实现了合金中贱金属和稀贵金属的高效分离。     

镍精矿加压酸浸新工艺研究

研究了金川镍精矿加压一步全浸镍、钴、铜新工艺,浸出液中和除铜后萃取分离镍钴,镍、钴、铜的浸出率可分别达到99.5%、98%和98%以上。该工艺与硫酸选择性浸出相比具有金属浸出率高、分离彻底、易分别回收等优点。     

一次高镍锍中细粒合金的提取研究

一次高镍锍中细粒合金的存在是影响贵金属在分离产品中分配的主要因素，因此如何减少细粒合金和如何提取细粒合金是高镍锍分离工艺的难题之一。本仅讨论了细粒合金的磁选特性及根据这些特性采取的相应对策，即选择适合的磁场强度和磁选设备，从镍精矿中提取回收细粒合金，并制定出了具体的实施方案。     

常压酸浸从废旧镍基合金中浸出镍钴

以氯酸钠为氧化剂,采用常压氧化酸浸工艺从废旧镍基合金中浸出镍、钴,钨、钼、钽等稀贵元素富集在浸出渣中。结果表明,在下述最佳条件下,镍、钴的浸出率均可达到99%以上:粒度0.075~0.100mm、硫酸浓度4.5mol/L、液固比8∶1、氯酸钠用量2.0g(占合金废料的2%)、反应时间2.5h、反应温度(85±3)℃。     

高温合金废料氧化酸浸工艺研究

以过氧化氢为氧化剂,采用氧化酸浸工艺使镍钴高温合金废料中的镍、钴、铼等进入溶液,钨、铪等富集在浸出渣中。结果表明,在下述最佳条件下,镍、钴、铼的浸出率均可达到99%以上:合金粉100g,粒度0.075~0.100mm,盐酸浓度6mol/L,液固比6∶1,30%过氧化氢用量200mL,反应温度85℃,反应时间3h。     

P507萃取分离镍钴工艺研究

以湿法工艺处理镍基高温合金废料过程中产生的镍钴净化富集溶液为原料,以P507为萃取剂,使用连续化逆流萃取分离设备——混合澄清槽,采用"P507六级萃取钴—六级洗涤—四级反萃"连续萃取工艺,获得了镍富集溶液和钴富集溶液,其中镍富集液中镍钴浓度比达8 000、钴富集液中钴镍浓度比达12 576,实现了镍钴的有效分离。     

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%.     

低冰镍氧压水浸试验研究

针对低冰镍现有处理工艺的不足,研究了低冰镍一种新的处理工艺——氧压直接水浸低冰镍,并对水浸的条件进行了条件优化实验。优化后水浸条件以温度175±5℃,浸出时间2.5 h,氧分压1.6 MPa,转速600r/min为宜。在优化条件下,低冰镍浸出率:Ni≥98%,Cu≥99%,Co≥99%,Fe<16%,为后续镍、铜、钴的分离创造了有利条件。     

一种浸出海绵铜的方法

正一种浸出海绵铜的方法,涉及一种从铜镍冶炼和精炼产生含铜渣-海绵铜中浸出镍、钴、铜的方法。其特征在于其浸出过程是以硫酸为浸出试剂,以氧为浸出氧化剂,加压氧化浸出海绵铜物料中的镍、钴、铜。本发明的优点是在此条件下进行海绵铜加压氧化浸出,铜、镍、钴的浸出率都能达到99%以上,同时浸出液中铜离子浓度可达90 g/L     

从印尼含镍红土矿中浸出镍、钴工艺试验研究

印尼某含镍红土矿属低镁褐铁矿型,镍主要赋存于褐铁矿中。研究了采用还原焙烧-氨浸、直接氨浸、加压酸浸、直接酸浸—沉矾除铁等工艺从红土矿中浸出镍和钴。结果表明:采用氨浸工艺,镍、钴浸出率较低;采用直接酸浸—沉矾除铁工艺,镍、钴浸出率均在80%~90%,而且浸出矿浆的过滤性能良好;采用加压酸浸工艺,镍、钴浸出率在90%以上。     

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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