钼酸铵生产工艺优化浅析

文章阐述了现有钼酸铵生产工艺的特点及不足,进行大量的小型试验研究,提出了优化工艺,确定了新工艺的较佳工艺条件。利用新工艺处理钼焙砂,一方面可大大降低焙砂中的杂质含量,降低了硫化铵的单耗,每吨钼酸铵硫化铵单耗由0.025t降至0.01t以下,且有效地提高钼酸铵产品品质和纯度,另一方面实现了钼铼有效分离,并为铼金属综合回收提供了有利条件。     

十二钼酸铵焙解工艺研究

通过研究焙解十二钼酸铵制备高纯三氧化钼工艺,探讨钼酸铵焙解工艺各个影响因素之间的关系;在不同条件下制备出形貌各异、粒度不同的高纯三氧化钼,阐述了钼酸铵焙解条件与高纯三氧化钼特征影射关系。     

结晶工艺与钼酸铵品质的对比研究

对比研究了二钼酸铵、四钼酸铵、七钼酸铵、及十二钼酸铵结晶工艺,考察钼酸铵的元素含量、晶体形貌和结晶工艺的对应关系,为钼酸铵除杂、掺杂研究者提供借鉴。     

十二钼酸铵结晶工艺对比研究

通过对比十二钼酸铵结晶工艺,考察了不同结晶工艺制备十二钼酸铵的晶体形貌、粒度、晶体的衍射曲线,同时对十二钼酸铵结晶工艺进行了分析。     

一种用于钛合金制备的铝钼钛中间合金

一种十二钼酸铵的制备方法，包括制备混合溶液、制备十二钼酸铵前驱体、制备十二钼酸铵、洗涤烘干工艺步骤。本发明克服了传统制备十二钼酸铵采用王水提供强氧化和酸性条件方法的缺点，用高氯酸在较低的温度下，制备成高纯度的十二钼酸铵。所制备的十二钼酸铵用扫描电镜观察，晶形均一，结构完整，具有十二钼酸铵典型的六方棒状晶形，用X-射线衍射仪测试，X-射线衍射图谱与十二钼酸铵标准的X-射线衍射图谱相一致，属于十二钼酸铵晶体。本发明具有操作安全、耗能较少、可明显提高十二钼酸铵结晶度和纯度等优点，可用于制备十二钼酸铵。     

用二钼酸铵制备仲钼酸铵的实验研究

介绍了用二钼酸铵制备仲钼酸铵的方法,并通过对pH值、温度、Cl-浓度和搅拌速率进行实验分析,确定了制备仲钼酸铵的工艺条件和对一次直接回收率的影响,产品质量达到国家一级标准。     

化学镀Ni-B合金的工艺条件研究

研究了镀液成分和工艺条件对Ni—B合金沉积速度的影响，确定了合适的化学镀N—B合金的工艺条件，按此条件获得了含硼量为4．508％的非晶态Ni—B合金层，并具有较好的耐蚀性。     

七钼酸铵连续式结晶工艺优化研究

本文对连续式制备七钼酸铵工艺进行了优化研究,在工艺研究的过程中,以七钼酸铵粒度为评价指标,利用单因素实验,对影响七钼酸铵粒度的因素进行分析,确定主要影响因素,随后利用Box-Behnken响应面法系统研究工艺参数对粒度的影响,得出最佳的制备工艺条件为:进料密度1.394 g/mL,搅拌速度125 r/min,外循环流量565 L/min,结晶温度为22℃。在此条件下进行3次平行实验,得到七钼酸铵粒度的平均值为408.6μm。     

掺镧八钼酸铵制备工艺研究

本文主要对掺镧八钼酸铵制备工艺进行探索研究。在八钼酸铵制备过程中,通过在不同阶段加入硝酸镧,制备掺镧八钼酸铵。确定了掺镧八钼酸铵的制备过程中硝酸镧加入方式和加入时间;通过对掺镧过程溶液pH值的考察试验,确定掺镧八钼酸铵制备工艺为液-液掺杂;重复和均匀性试验完善和证明了液-液掺镧八钼酸铵制备工艺。     

钼酸铵溶液除磷试验研究

通过大量的条件试验,对钼酸铵生产溶液含磷高的问题进行了有针对性的分析和研究,据此选用一种新型除磷剂进行除磷,除磷率都达到97%以上。试验还确认了较佳的工艺条件,为企业生产出合格的钼酸铵产品提供了技术依据。     

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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