采用锌粉置换—氧化水解法分离溶液中的铟和锡

研究了采用锌粉置换—双氧水氧化—水解沉淀法从溶液中分离铟和锡,考察了溶液pH、搅拌速度、反应温度、反应时间等因素对锡置换,以及温度对Sn~(4+)水解、铟回收率的影响。结果表明:在pH为1.0～2.0、反应温度40℃、搅拌速度120 r/min、反应时间4 h条件下,锡置换率约为91%,海绵锡中锡质量分数大于98%,铟质量分数小于0.2%;置换后液经双氧水氧化后,在80℃、溶液pH=2.5条件下水解,抽滤洗涤后获得氢氧化锡沉淀,锡沉淀率为99%以上,氢氧化锡中铟质量分数小于0.5%;铟、锡分离较彻底,回收率较高。     

离子型稀土浸出液复合钠盐高效富集稀土

为实现无铵富集稀土,以复合钠盐为沉淀剂,对铝盐体系离子型稀土矿浸出液中稀土进行富集。考察了pH对稀土浸出液除铝效果的影响,研究了不同沉淀剂、沉淀剂配比及用量、终点pH、反应温度、反应时间、陈化时间对稀土沉淀率的影响。结果表明,在初始稀土浓度0.014 64 mol/L、铝浓度0.54 g/L、初始pH=3.89、反应温度25 ℃、反应时间60 min的条件下,除铝终点pH=4.93时,残余铝浓度为13.02 mg/L,稀土损失为1.2%;当复合沉淀剂用量为0.7倍理论量的70%NaHCO3+30%Na2CO3、沉淀终点pH=6.72、反应时间60 min、反应温度25 ℃、陈化时间40 min时,稀土沉淀率高达99.68%,灼烧后氧化稀土总量为96.48%,铝含量为0.52%。     

用氟化法沉淀脱除硫酸钴溶液中Ca~(2+)、Mg~(2+)的方法

研究了用氟化法沉淀脱除硫酸钴溶液中Ca~(2+)、Mg~(2+)的方法,该方法用NaF作沉淀剂,考察了NaF用量,反应终点pH值,反应温度,搅拌转速等因素对CoSO_4溶液中Ca~(2+)、Mg~(2+)脱出率的影响。试验结果表明,在NaF加入量为Ca~(2+)、Mg~(2+)摩尔理论总量的4倍,终点pH值5.5～6.0,反应温度80℃～90℃,搅拌转速300 r/min,反应时间1 h,到达终点pH值后,稳定0.5 h的条件下,Ca~(2+)、Mg~(2+)脱除率分别可达到96.67%,99.54%;Co损失率可以控制在2%以内。     

从粉煤灰碱溶液中沉积含铝白炭黑

研究了从粉煤灰碱浸液中沉积含铝白炭黑,考察了溶液pH、沉积温度、搅拌速度、沉积时间对硅、铝沉积率及白炭黑中硅、铝质量分数的影响。结果表明:在溶液pH=8、沉积温度80℃、搅拌速度200r/min、沉积时间4h条件下,硅、铝沉积率分别为98.46%和66.16%,得到的含铝白炭黑的比表面积为75~115m2/g,DBP吸油值为135~215g/100g,SiO_2质量分数为80%~82%,Al_2O_3质量分数为4.96%~7.93%。     

针铁矿法净化铜电解液中铁的试验研究

试验研究了针铁矿法从铜电解液中净化除铁的过程。结果表明,溶液终点pH、反应温度、反应时间和空气流量是除铁过程的影响因素。在终点pH=3.0、反应温度90℃、反应时间2 h、空气流量0.3 m~3/min的条件下,除铁率达到97.4%,溶液中铁离子浓度由3.62 g/L降至0.04 g/L以下。     

废旧电池回收过程中硫酸镍钴锰溶液除铁铝工艺研究

研究了采用倒序加料法从硫酸镍钴锰溶液中同时去除铁铝。将含铁铝硫酸镍钴锰料液和碳酸钠溶液同时滴加到硫酸钠溶液中,控制溶液pH,使生成铁矾渣进而去除铁铝,考察了硫酸钠溶液质量浓度、碳酸钠溶液质量浓度、反应体系pH、加料速度、温度对铁铝去除率及渣中镍钴质量分数的影响。结果表明:在硫酸钠溶液质量浓度3.55g/L、反应体系pH=4.1、碳酸钠溶液质量浓度100g/L、加料速度13mL/min、温度70℃、搅拌速度250r/min条件下,铁、铝去除率分别为99.49%和86.25%,渣中镍、钴质量分数分别为0.68%和0.24%,渣量较少且易沉降、过滤及洗涤,铁铝去除效果较好。     

湿法炼锌净化镍钴渣全湿法回收新工艺

采用全湿法工艺浸出湿法炼锌净化镍钴渣,活化剂进行锌钴分离回收钴。结果表明,采用下述二段浸出工艺:温度70℃,反应时间1.5h,液固比4∶1,一段浸出终点pH 4.5⁵.0,二段浸出终点pH<0.5,锌浸出率大于98%以上,回收率95%以上。     

针铁矿法从铬铁合金硫酸浸出液中除铁

研究了用针铁矿法从铬铁合金硫酸浸出溶液中除铁并回收铬。考察了溶液中铬离子浓度、温度、pH对除铁率及铬损失率的影响。试验结果表明,针铁矿法除铁的最佳条件为反应温度94℃,溶液pH=2．5,溶液中铬质量浓度7．2g/L,搅拌强度200r/min,在此条件下,铁的去除率高达99%,铬的损失率仅15%。     

盐湖卤水提锂溶液制备碳酸锂试验

以吸附法盐湖卤水提锂溶液和碳酸钠为原料制备碳酸锂,研究了反应时间、锂质量浓度、反应温度、搅拌速度及洗涤条件对碳酸锂制备的影响。结果表明,以400 g/L碳酸钠溶液为沉淀剂,锂质量浓度18 g/L,反应温度30 ℃,130 r/min速度搅拌,反应1 h可以得到颗粒粒径大且均匀的碳酸锂,锂沉淀率达到85%以上;采用三段逆流、V水/V固=2/1、温度80~90 ℃的水对沉淀洗涤,可得碳酸锂含量99%以上的产品,洗涤过程锂损失2%。     

铬铁合金中的铬、铁分离研究

研究了从废铬铁合金中回收铬。用硫酸浸出废铬铁合金,用莫尔盐结晶法分离溶液中的铁,考察了主要工艺条件对浸出和铬铁分离效果的影响。结果表明:在硫酸质量浓度500 g/L、固液质量体积比1∶6、温度95℃、合金粒度61~44μm、浸出4 h条件下,铬浸出率达93.85%;在溶液pH=0.5,硫酸铵过量系数3.0,[Cr3+]=70 g/L左右,[Fe2+]为15~20 g/L,温度70℃条件下反应6 h,然后快速冷却结晶24 h,除铁率达96.52%,而铬损失率只有1.85%,铬、铁分离效果较好。     

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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