盐酸浸出赤泥中铝的试验研究

研究了用盐酸从赤泥中浸出铝。通过正交试验、极差分析和方差分析,确定了各因素对Al2O3浸出率的影响及浸出最佳条件。结果表明:各因素对Al2O3浸出率的显著性影响顺序为盐酸浓度温度液固体积质量比浸出时间;最佳浸出条件为:温度107℃,浸出时间90min,液固体积质量比5∶1,盐酸浓度7mol/L;最佳条件下,Al2O3浸出率为72.07%;浸出反应符合液体与多孔固体间的反应模型。确定了Al2O3浸出率与浸出时间的最佳拟合方程。     

盐酸浸出氧化铝赤泥回收镓

研究了拜耳法赤泥盐酸浸出镓的过程。采用正交试验考察浸出温度、时间、液固比和酸度对镓浸出率的影响。结果表明,在最佳浸出条件下:8mol/L盐酸、液固比4.0、109℃浸出5h,镓浸出率达到95.4%。用50%TBP+50%煤油一次萃取,镓萃取率达到98%。用0.5%食盐水反萃,镓反萃率为96.8%。反萃液用0.5mol/L NaOH溶液中和、过滤、烘干后,固体中镓的质量百分数为4.32%,从赤泥中富集了136倍。镓的总回收率达到85%以上。     

废旧稀土荧光粉除铝渣二段酸浸回收稀土的研究

以废旧稀土荧光粉经酸浸、苛性钠焙烧、水洗除铝后的除铝渣为原料,采用二段酸浸并进行正交实验优化酸浸条件。结果表明,一段酸浸时,各因素对稀土浸出影响顺序为:液固比盐酸浓度浸出时间浸出温度H_2O_2添加量。在液固比6∶1、盐酸浓度6 mol/L、浸出时间60 min、浸出温度60℃、H_2O_2添加8%(体积分数)优化条件下,稀土总浸出率为95.48%,残酸浓度为2.18 mol/L,杂质Al含量高达134 mmol/L,Fe含量为1.78 mmol/L,Si含量达到3.89 mmol/L;二段酸浸在浸出温度60℃、浸出时间60 min下,通过添加新鲜除铝渣调节浸出液终点pH值为4,二段酸浸液杂质Al、Fe、Si含量降低到24.1 mmol/L、0.09 mmol/L、3.89 mmol/L,满足后续萃取要求。     

二次铝灰酸浸制备聚合氯化铝的研究

二次铝灰中仍含大量铝,对其进行回收具有重要意义。文中以二次铝灰为原料,通过盐酸浸出处理后再添加铝酸钙制备聚合氯化铝（PAC）,研究了HCl浓度、浸出温度、时间、液固比,铝酸钙添加量等因素的影响。综合考虑,适合二次铝灰酸浸制备聚合氯化铝的较优条件为:水洗后的二次铝灰在HCl浓度为6 mol/L,液固比为4∶1 mL/g,温度为85 ℃条件下酸浸2 h,此时的酸浸液中加入12 g/80 mL的铝酸钙,温度为85 ℃条件下反应1.5 h。该条件下酸浸过程中铝的浸出率为48.67%,且制得的液体PAC完全符合国家标准。      

从风化壳淋积型稀土矿除杂渣中酸浸稀土和铝

研究了用盐酸从风化壳淋积型稀土矿除杂渣中浸出稀土和铝,考察了盐酸浓度、温度、液固体积质量比和浸出时间对稀土、铝及杂质离子浸出率的影响。结果表明:在盐酸浓度1 mol/L、液固体积质量比10/1、温度40℃条件下浸出30 min,镧、钇、铝浸出率分别为85%、66%和48%,杂质离子铁、钾、镁浸出率均较低;酸浸液用100 g/L碳酸氢铵溶液调pH分步沉淀铝和稀土,铝和稀土最终回收率分别为46%和75%。采用该工艺可实现二次资源综合回收,有较好经济效益。     

氯化挥发金泥提金试验

采用氯酸钠浸出—亚硫酸钠还原工艺从金泥中提金,考察了氯酸钠用量、盐酸用量、浸出时间、温度和硫酸添加量等对金浸出率的影响以及电位对金还原率的影响。结果表明,在液固比2∶1、氯酸钠用量为矿量的5%、盐酸用量1mol/L、时间1h、温度85℃、硫酸添加量40g/L的条件下,金浸出率高于98.5%;控制电位600~700mV,金还原率高于97%,金粉中金品位达到68.5%以上。     

用高温焙烧-盐酸浸出法从粉煤灰中浸出镓

研究了采用高温焙烧—盐酸浸出工艺从粉煤灰中浸出镓,考察了助剂(Na2 CO3,K2 CO3)与粉煤灰混合比例、焙烧温度、焙烧时间对粉煤灰高温焙烧的影响及浸出温度、盐酸浓度、固液质量体积比对镓浸出的影响.结果表明:Na2 CO3与K2 CO3(质量比3/1)的混合助剂与粉煤灰按质量比0.5/1混合,在950℃下焙烧2 h后,再用3 mol/L盐酸溶液在60℃、固液质量体积比1/10条件下浸出2 h,镓浸出率达93.43％,浸出效果较好.     

甲酸-盐酸还原浸出低品位软锰矿

研究了以盐酸为介质,用甲酸还原浸出低品位软锰矿,考察了盐酸浓度、甲酸用量、反应时间、反应温度及液固体积质量比对锰、铁、铝浸出率的影响。结果表明:各因素对锰浸出率的影响顺序依次为盐酸浓度、液固体积质量比、甲酸用量、反应温度和反应时间;在盐酸浓度为0.3mol/L、甲酸用量为3mL、液固体积质量比为8∶1、温度为90℃、反应2h条件下,锰浸出率为93.4%,铁、铝浸出率分别为65.86%和27.54%。     

钼精矿中铼回收工艺研究

针对含铼钼精矿研究了焙烧石灰添加量、焙烧温度、硫酸浓度、液固比、浸出温度、浸出时间对钼、铼浸出率的影响,并对铼浸出液进行萃取分离钼铼研究。结果表明:含铼钼精矿在焙烧过程石灰添加量为精矿量1.8倍、焙烧温度700℃、硫酸浓度60 g/L、液固比5:1、浸出温度为70℃、浸出时间2 h的优化条件下,钼、铼浸出率分别为0.79%、90.50%,可基本实现钼铼分离。铼浸出液采用5%N235作为萃取剂,在硫酸浓度为150 g/L、相比O/A=1/6、萃取时间4 min条件下,铼萃取率达96%以上,铼钼分离系数达到815。     

酸浸拜耳法赤泥制取聚合氯化铝铁并处理工业废水试验研究

研究了以拜耳法赤泥和工业盐酸为原料制备聚氯化铝铁(PFAC),考察了液固体积质量比、浸出时间、浸出温度及盐酸浓度对赤泥中Al2O3和Fe2O3浸出率的影响及PFAC处理工业废水的絮凝效果。试验结果表明,在盐酸浓度6mol/L、反应时间3.5h、温度85℃、液固体积质量比4mL/1g的最优条件下,Fe2O3和Al2O3浸出率分别为94.11%和84.33%,此时溶液中m(Fe)/m(A1)=0.55;用制得的液态聚氯化铝铁(PFAC)处理工业废水,絮凝效果较好。     

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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