加压氧化-氰化浸出工艺从酸浸渣中提金试验研究

对加压氧化-氰化浸出工艺从酸浸渣中提金进行了试验研究。研究结果表明,利用高效浸金设备进行氰化浸出4h,金的氰化浸出率可达97．85％;其与常规氰化法相比,浸出时间缩短了32h。浸出率提高了2．05％,NaCN用量减少了4kg／t。该工艺是一个值得推广的金浸取方法。     

氰化尾渣中金的回收试验研究

某黄金矿山生物氧化-氰化炭浸工艺产生的氰化尾渣中金品位较高,为2. 40~3. 60 g/t。试验考察了焙烧氧化-氰化浸出工艺回收金的可行性。结果表明:在焙烧温度500℃、弱氧化气氛下焙烧120 min,获得的焙砂在氧化钙用量15 kg/t、矿浆浓度33%、氰化钠用量1. 0 kg/t、浸出时间24 h条件下进行氰化浸出,浸渣产率为88. 80%,金浸出率在94. 92%以上;采用焙烧氧化-氰化浸出工艺回收氰化尾渣中的金是可行的。该研究为氰化尾渣中金的回收利用提供数据参考。     

含碲金精矿氰化浸出的试验研究

含碲金精矿是一种典型的难浸精矿。本文通过多种方案的对比试验，表明金碲精矿先经硝化预处理，然后进行常规氰化浸出，金的浸出率可达９５％以上，氰浸渣经硫化钠浸出，可回收６０％以上的金属碲。     

氰化尾渣提金预处理试验研究

针对某选矿厂高硫高砷难处理金矿石经两段焙烧—氰化浸金后产生的尾渣,根据其性质分析,采用硫酸浸铁—硫脲浸金工艺进行提金试验研究。其结果表明:在最优浸铁条件下,即浓硫酸用量45 m L、温度80℃、时间4 h、液固比4∶1,产出的浸铁渣再进行硫脲浸金,铁和金的浸出率分别达到60.37%和63.44%;这表明采用该工艺可有效地从该氰化尾渣中浸出回收金。     

从含砷金精矿二段焙烧酸浸渣中氰化浸出金银的试验研究

进行了从含砷金精矿二段焙烧酸浸渣中氰化浸出金银的工艺试验研究.研究表明,采用RMD对含砷金精矿的二段焙烧酸浸渣进行预处理,可除去大部分砷和部分铅,使金、银的氰化浸出率比常规工艺分别提高4.51%和51.30%,其经济效益显著.     

氰化尾渣硫脲浸金试验

采用硫脲法浸金工艺对某难处理氰化尾渣进行浸出试验。结果表明,在液固比3∶1,pH=1～1.5,硫脲浓度2kg/t,温度60℃,浸出6h时,金浸出率可达82.30%。     

浮选精矿氰化尾渣金、银回收研究

对致使含硫、砷浮选金精矿氰化浸出率低,尾渣全、银品位高的原因进行了分析;介绍了目前在提高氰化尾渣金、银浸出率方面所采用的措施,指出通过加入混合添加剂、采用两段焙烧、氰化前加入助浸剂共磨,可使尾渣中金、银的氰化浸出率提高到82．92％和61．54％,品位降至0．55g／t和30g／t。     

分金(银)渣氰化工艺的改进

根据对分金（银）渣中金、银物相组成的分析结果，对分金（银）渣氰化工艺进行了相应的改进，消除了铅对金氰化浸出的不利影响，并延长了银的浸出时间，从而显提高了金、银的浸出率。     

从含金铅精矿中回收金的试验研究

为了提高经济效益,对从铅精矿中氰化浸出回收金进行了研究,其盈亏平衡点是金的浸出率≥50.00%,铅浸出率≤3.00%.经细磨、碱浸预处理、高碱高氰浸出、控制浸出矿浆浓度及浸出时间,金的浸出率达85.00%以上,铅浸出率＜0.50%,浸出后的尾渣仍作为铅精矿出售.     

高酸浸出处理氰化尾渣的实验研究

以某黄金冶炼厂氰化尾渣为原料,采用高酸浸出对氰化尾渣进行处理。探讨了高酸浸出硫酸用量、浸出时间和浸出温度对氰化尾渣中铁浸出率的影响。结果表明：硫酸用量为理论量3.5倍,浸出温度363 K,浸出时间4 h时,氰化尾渣中铁浸出率达93.33%。对高酸浸出渣进行氰化浸出,金、银回收率分别达到90%和76.92%。     

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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