沸腾焙烧烟灰浸出金、银、铜的研究

采用酸浸—氰化工艺从某沸腾焙烧烟灰中浸出金、银、铜。结果表明,较优工艺为:酸浸硫酸浓度1.0mol/L,液固比4∶1,反应温度90℃,反应时间4h,搅拌速度300r/min;氰化浸出反应液固比3∶1,氰化钠浓度0.2%,pH 10~11,反应时间48h,搅拌速度300r/min。此条件下,金、银、铜的浸出率分别为97.16%、79.98%、96.04%。     

从某沉积污泥中提取金、银试验研究

采用焙烧-酸浸-氰化工艺从沉积污泥中提取金、银,试验考察了氰化浸出反应液固比、pH值、氰化钠质量分数、反应时间、搅拌速度对金、银浸出率的影响。沉淀污泥在焙烧温度903K、焙烧时间2h的条件下,进行预处理;焙砂在反应液固比4：1、硫酸浓度0．5mol／L、反应时间3h、反应温度323K、搅拌速度300r／min的条件下,进行硫酸浸出;酸浸渣在反应液固比4：1、pH10．5、氰化钠质量分数0．4％、反应温度298K、搅拌速度250r／min、反应时间72h的条件下,进行氰化浸出;金、银浸出率分别可达93．2％、79．1％。     

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。     

某复杂银精矿提金、银工艺研究

采用一段焙烧-酸浸-氰化工艺处理某复杂银精矿,结果表明:在焙烧温度923 K,焙烧时间2 h,酸浸反应液固比1.5∶1,反应pH 值为0.8～1.0,反应温度368 K,反应时间1.5 h,氰化反应液固比2∶1,反应pH 值为10～11,NaCN 浓度1.5 ‰,反应时间48 h 条件下,氰化浸出时Au、Ag 的浸出率分别为72.01 %、18.41 %,尾渣银含量355 g/t.在复杂银精矿与其它矿样按一定比例重新配矿后,采用相同试验条件,氰化时Au、Ag 的浸出率分别提高24.89 %、15.66 %,尾渣中银含量降低了223.35 g/t.      

银精矿在[Bmim]HSO_4离子液体—硫脲体系中的浸出行为

用[Bmim]HSO4离子液体取代硫酸进行了硫脲浸取银精矿的浸出行为研究。考察了磨矿细度、[Bmim]HSO4浓度、硫脲浓度、Fe3+浓度、液固比、浸出时间等对银浸出率的影响。结果表明,在磨矿细度-0.043mm占80%、硫脲浓度0.18mol/L、[Bmim]HSO4浓度0.3mol/L、Fe3+浓度7.5mmol/L、液固比3∶1、浸出时间18h的最优条件下,银浸出率可达到73.96%。在[Bmim]HSO4-硫脲、H2SO4—硫脲和氰化体系中,[Bmim]HSO4—硫脲体系不但银浸出率最高,而且浸出时间最短。     

从湿法炼锌渣中回收银和硫

研究了用二甲苯浸出—焙烧—硫酸浸出杂质—氰化浸出银工艺从湿法炼锌渣中回收硫和银。试验结果表明:在反应温度95℃、反应时间15min、液固体积质量比5∶1条件下用二甲苯浸出,硫浸出率为96.40%;分硫渣中加入1%氢氧化钠,在630℃下焙烧2h,然后用硫酸浸出锌、铁等杂质,控制液固体积质量比为4∶1,pH为1.0,反应温度为95℃,反应时间为3h;之后对硫酸浸出渣氰化浸出银,体系pH控制在9.5~11.5之间,液固体积质量比为3∶1,氰化钠质量浓度2.0g/L,浸出时间24h,银回收率为78.5%。     

用盐酸从加碱焙烧粉煤灰中浸出钛

研究了采用加碱焙烧—盐酸浸出法从粉煤灰中浸出钛,考察了盐酸浓度、浸出温度、浸出时间、搅拌速度和液固体积质量比对钛浸出率的影响。试验结果表明:将粉煤灰与氢氧化钠按质量比1∶1混匀,在微波功率800 W下焙烧5min后再进行浸出,钛浸出效果更好;在盐酸浓度11.64mol/L、浸出温度88℃、浸出时间8h、搅拌速度1 200r/min、液固体积质量比9∶1条件下,钛浸出率为85.77%。     

硫氰酸盐—铁(Ⅲ)体系从废电路板中选择性浸出金银

采用硫氰酸盐法从硫酸双氧水体系预处理废电路板金属部分后的渣中选择性浸出金银,并对硫氰酸盐浓度、铁离子浓度、溶液pH、液固比、搅拌速度、温度、浸出时间等因素进行优化。结果表明,在0.1mol/L Fe3+、0.6mol/L SCN-、pH=2、液固比500∶2、搅拌速度200r/min、温度15℃、浸出8h的条件下,金银浸出率分别达到95%和99%,铅浸出率不超过4.5%。     

硫氰酸盐—双氧水体系回收废电路板中的金

采用硫氰酸盐—双氧水浸金体系从废电路板中回收金和银,详细考察了硫氰酸盐浓度、双氧水浓度、溶液pH、固液比、温度和搅拌速度等对金银浸出率的影响。结果表明,在0.05 mol/L H2O2、0.4mol/L SCN-、固液比1/250、搅拌速度200r/min、室温(~15℃)浸取8h的条件下,金、银浸出率分别超过90%和79%,铅浸出率为9.7%。     

SO2-3、NH3?H2O、Cu2＋对高硫金精矿石硫合剂浸出的影响

采用石硫合剂提金法对高硫金精矿进行浸出试验,考察了SO 2-3、NH3? H2 O、Cu 2＋浓度对浸出过程的影响。其结果表明：在磨矿细度-400目80％,液固比6∶1,SO 2-3浓度0．1 mol/L, NH3? H2 O浓度1．6 mol/L,Cu 2＋浓度0．04 mol/L,Na2 CO3浓度0．1 mol/L,搅拌速度500 r/min,浸出温度40℃,浸出时间8 h的条件下,金的浸出率达到88％左右;浸出过程中加入SO 2-3,保证S 2-x和S2 O 2-3的稳定性,并减少因S单质、CuS和Cu2 S的沉积而阻碍浸金传质过程的影响;NH3? H2 O不仅调节浸出pH值,而且与Cu 2＋形成[Cu（NH3）4]2＋,促进金的浸出。     

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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