硫精矿中铁、铜、钴综合回收试验研究

为了实现低品位铜、钴硫精矿中铁、铜、钴的综合回收,采用氧化—还原焙烧—浸出—磁选工艺,分别探究了硫酸浓度、浸出时间等工艺参数对焙烧渣中铜、钴浸出率的影响.结果 表明:硫精矿经氧化—还原焙烧处理后铜的浸出率更高,钴的浸出率有所下降.在硫酸体积浓度为5％、浸出温度为55 ℃、浸出时间为7.5h、液固比为5.0的条件下,氧化...     

卢安夏钴精矿焙烧—浸出铜钴试验研究

研究了采用沸腾焙烧—两段浸出工艺从卢安夏钴精矿中回收铜、钴,考察了焙烧温度、过剩空气系数、Na_2SO_4加入量及浸出条件对Cu、Co浸出率的影响。钴精矿首先在681℃(沸腾层)、过剩空气系数1.71、空气直线速度0.247m/s、Na_2SO_4加入量2%条件下进行焙烧,然后经两段浸出(一段浸出:液固体积质量比3∶1,浸出温度60℃,浸出时间2h,初始硫酸质量浓度32g/L;二段浸出:液固体积质量比4∶1,浸出温度95℃,浸出时间3h,初始硫酸质量浓度180g/L),结果表明,钴、铜浸出率分别达90.18%和90.45%,浸出效果较好。     

青海某硫铁尾矿综合回收利用试验研究

该尾矿先经过选矿得到合格精矿,精矿再通过沸腾焙烧-酸浸工艺得到合格铁精粉,其中焙烧温度为850℃,酸浸条件为:初始酸浓度为80g/L,液固比为2∶1,酸浸温度为80℃,酸浸时间为3h。酸浸后各主要组分含量分别为铁66.51%,硫0.11%,铜0.14%,钴0.044%;铜、钴的浸出率分别为70.08%、60.07%,有效地实现了该尾矿的综合回收利用。     

某碳质金精矿石硫合剂法浸出试验研究

采用石硫合剂对某碳质金精矿进行了浸出金试验,考察了焙烧时间、焙烧温度、浸出时间及浸出温度等因素对金浸出率的影响。试验研究结果表明,焙烧时间和焙烧温度是影响金浸出率的关键因素。当焙烧时间3 h,焙烧温度600℃时,金精矿中的金可被石硫合剂溶液有效浸出;当浸出时间为5 h,浸出温度为50℃时,浸出率明显升高。在最佳浸出条件下,金浸出率最高可达到96%。     

从高铜金精矿中综合回收有价金属试验研究

研究了以沸腾焙烧—酸浸—氰化浸出工艺从高铜金精矿中综合回收铜、金等有价元素。试验确定的最佳条件为:1)高铜金精矿沸腾焙烧预处理温度为650℃,焙烧时间为2h;2)焙砂用硫酸浸出铜,硫酸质量浓度为50g/L,浸出时间为2h,浸出温度为80℃,液固体积质量比为4∶1~5∶1,浸出后渣铜品位降至0.286%;3)硫酸浸出渣与静态焙烧渣用氰化钠浸出金,金浸出率为96.5%,银浸出率为63.5%。该工艺对高铜金精矿中Au、Ag、Cu的综合回收率较高。     

硫铁精矿焙砂提高铜浸出率试验研究及生产应用实践

某冶炼厂采用焙烧工艺处理硫铁精矿生产硫酸及铁精粉,同时采用酸浸-萃取-电积工艺综合回收其中的铜,采用800℃进行焙烧脱硫,铜浸出率仅50%左右。对影响铜浸出率的关键因素进行考察得知,焙烧指标是影响铜浸出率的关键因素。因此在马弗炉中进行温度焙烧试验,考察了焙烧温度、焙烧时间和料层厚度对铜浸出率的影响。结果表明,在650℃低温环境中进行焙烧,料层厚度0.5 cm,焙烧时间1.5 h,烧渣后续酸浸,相比常规800℃高温焙烧,铜浸出率提高至70%以上,通过采取延长焙烧时间和合理配矿等措施,铁精粉中硫和铁含量指标不受影响。     

从钴硫精矿中回收钴的工艺探索试验研究

对钴硫精矿进行硫酸化焙烧-焙砂水浸钴铜-浸出液碳酸钠中和沉钴-钴铜渣浸出/萃取分离回收钴铜-焙砂浸出渣还原焙烧制铁精矿球团的处理工艺是可行的,可以综合回收其中的钴、铜、硫、铁;全流程钴的回收率大于80%。     

某含金银硫精矿焙烧—氰化浸出试验研究

针对云南某低品位含金银硫精矿硫含量高,直接氰化浸出金、银回收率低等问题,进行了焙烧—氰化浸出试验研究。结果表明:硫精矿经过焙烧脱硫后氰化浸出,金、银浸出率得到大幅提高,在焙烧温度600℃,焙烧时间3 h,石灰调p H值至11,搅拌速度1 380 r/min,磨矿细度-0.043 mm占92.48%,氰化钠用量3 kg/t,矿浆液固比3∶1,浸出时间36 h的最佳条件下,金浸出率可达81.41%,银浸出率46.77%,较直接氰化浸出分别提高42.22百分点和26.77百分点。     

刚果(金)某硫化铜钴精矿加压浸出研究

采用加压浸出工艺处理刚果(金)某硫化铜钴精矿,考察了温度、氧分压、反应时间、液固比和初始酸度等对加压浸出效果的影响。结果表明,在温度180℃、氧分压600kPa、反应时间2h、液固比5的条件下,钴浸出率可达98.5%以上,铜浸出率可达99%以上,硫浸出率可达98%以上。     

某难处理金精矿焙烧—氰化提金工艺试验研究

针对某难处理金精矿,采用焙烧-氰化提金工艺进行实验研究。试验得到的最佳条件为:金精矿粒度-0.043 mm 52.85%、一段焙烧温度450℃、时间1 h(炉门关闭),二段焙烧温度700℃(炉门稍开),焙烧时间0.5 h;初始氰化钠浓度0.5‰、L/S=4、氰化时间24 h。在此条件下硫、砷的脱除率分别为99.99%、52.56%,金的浸出率为88.92%。     

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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