高铜钴硫酸锌溶液锌粉高温净化除钴工艺研究

针对国内某冶炼厂高铜钴硫酸锌溶液净化除钴过程中存在高含量铜、钴离子造成在高温置换过程中钴返溶明显,造成锌粉用量大的问题,研究了锌粉加入方式、铜离子含量、温度、时间、锌粉用量等条件对高铜钴硫酸锌溶液一段高温净化除钴效果的影响,得出在较佳条件下,锌粉用量为钴含量75倍时净化后液中的Co可除至0.38 mg/L,满足净化除钴要求。     

湿法炼锌溶液深度除钴试验研究

云锡文山锌铟冶炼有限公司为降低净化工序锌粉单耗,提升新液质量,对一段净化后液开展了锑盐法深度除钴试验,并对试验结果进行了分析。试验得到的较优工艺参数为:搅拌转速400 r/min,温度85～90℃,锑钴比0.2～0.25,锌粉2.5～3.0 g/L,酸化pH值4.5,反应时间2～2.5 h。在此深度除钴条件下,可将溶液中Co含量除至0.4 mg/L以下,提高了新液质量,为锌电积创造了良好条件。同时,二段净化的良好工艺控制保证了较低的锌粉单耗,对稳定生产和降本增效具有重要指导作用。     

锌氧压浸出液深度净化除钴研究

针对丹霞冶炼厂原有湿法炼锌净化工艺新液的钴离子含量较低,不能满足技改工程氧压浸出电解对杂质钴离子含量要求的情况,通过模拟试验新工艺一净后液钴离子含量,用正交试验方法考察了锌粉、铜离子、锑白加入量对除钴率的影响.结果表明:当锌粉用量为2 g/L、铜离子用量为5 mg/L、锑白用量为2.5 mg/L时,除钴率的S/N比值最佳,且钴的复溶率最低.     

电炉锌粉和雾化锌粉逆锑盐除钴效果对比

净化除钴是湿法炼锌的一个关键步骤,随着系统硫酸锌溶液中杂质含量升高,出现新液合格率下降、净化渣难压滤、锌粉单耗高、电积工序不稳定等问题。某冶炼企业采用逆锑盐除钴工艺净化硫酸锌溶液,为解决上述问题,该企业对净化过程中用到的雾化锌粉及电炉锌粉进行了对比试验,得到如下结论:雾化锌粉纯度高,可用于一段净化工序除去液体中的铜、镉,以减少锌粉中杂质对海绵镉和海绵铜品位的影响;含铅1%～4%的电炉锌粉可在短时间内可实现深度除钴;控制硫酸锌溶液中Zn~(2+)≤155 g/L、Ca≤0.4 g/L,可保证除钴顺利进行。在硫酸锌溶液净化除钴时,以电炉锌粉为主搭配使用雾化锌粉,可保持较高的除钴率,并可避免压滤时间延长引起的钴返溶问题,另外,提升锌粉质量、合理控制除钴的工艺参数是降低锌粉单耗、提高新液合格率、保证锌电积生产稳定的重要措施。     

硫酸锌溶液除钻工艺研究

B型药剂净化和锌粉置换除钴存在成本高、用量大、工序复杂且净化过程需引入活性炭的特点.实验采用ZZ型药剂净化除钴,得到以下结论:反应温度为65℃、使用量为8.0倍于钴的摩尔质量、反应时间为120 min;且采用ZZ型药剂除钴较B型药剂除钴,每吨锌可节约成本45.98元.     

硫酸锌溶液除钴工艺研究

B型药剂净化和锌粉置换除钴存在成本高、用量大、工序复杂且净化过程需引入活性炭的特点。实验采用ZZ型药剂净化除钴,得到以下结论:反应温度为65℃、使用量为8.0倍于钴的摩尔质量、反应时间为120 min;且采用ZZ型药剂除钴较B型药剂除钴,每吨锌可节约成本45.98元。     

合金锌粉在锌湿法冶炼锑盐净化工序中的应用

文章以锌湿法冶炼锑盐净化工序为基础,对合金锌粉与普通锌粉在该工序中净化除杂效果进行了对比试验.试验结果表明,合金锌粉的采用可以大大提高除钴镍的效果,尤其是除钴效率;同时,与普通锌粉相比,合金锌粉在保证净化效果的前提下可以大幅度节约净化锌粉的用量,经济效益明显;合金锌粉的最佳合金浓度一般为0.2%.     

不同粒度锌粉除钴效果的探究及生产实践

对不同粒度锌粉除钴的程度及除钴的速度进行试验探究。结果表明:锑钴比0. 06,锌粉粒度控制在48～75μm,活性锌2 g/L,反应2 h,可将Co从13. 69 mg/L降至0. 3 mg/L,并运用于生产实践,取得较好经济效益。     

高锗硫酸锌溶液除锗试验研究

对含锗高的硫酸锌溶液的除锗工艺进行系统的研究,在锌粉用量3g/L、温度85～90℃、时间120min及添加剂用量为CuSO4·5H2O 0.32g/L、Sb2O3 6mg/L的条件下,净化后溶液的含锗<0.03mg/L,能够满足锌电解沉积周期48h时对溶液含锗的要求.     

新型除钴剂DCR硫酸锌浸出液净化除钴的工艺

研究了新型除钴剂(简称DCR试剂)脱除硫酸锌浸出液中杂质钴的工艺,考察了除钴剂用量、反应时间、反应温度、亚硝酸钠的添加量对除钴效果的影响.试验结果表明较优的工艺条件为:除钴剂为4 g/L,时间为60 min,温度为60℃,亚硝酸钠的添加量为0.6 g/L.在此条件下,钴的脱除率达到98.42%.     

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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