由菱锰矿直接制备软磁材料用锌锰二元粉试验研究

研究了以菱锰矿及钢铁厂的高炉烟灰为原料直接制取软磁材料用锌锰二元粉。试验确定了共同浸出、净化、共沉淀、煅烧、洗涤的最佳条件。在最佳工艺条件下,锰、锌浸出率分别为99.2%和90.0%,净化后溶液中Si质量浓度为10mg/L,沉淀剂((NH4)2S)对锰、锌沉淀及二元共沉粉中钙、镁杂质质量分数有影响。洗涤除杂后,沉淀粉在800℃下煅烧2h,Ca、Mg及Si质量分数分别为0.033%、0.077%和0.010%,符合制备中档锰锌软磁铁氧体用锰锌二元粉要求。     

直接法制备铁锰锌共沉淀粉的工业试验

在扩大试验基础上，以软锰矿、锌烟灰和铁屑为原料，进行了500t／a锰锌铁共沉淀粉湿法制备工艺工业试验。结果表明，Fe，Mn和zn总回收率分别为97．33％，97．16％和98．66％；Fe，Mn和zn的总直收率分别为83．58％，88．18％和85．57％。共沉淀粉的质量较高，配比非常接近理论值，杂质元素含量低。按单槽共沉粉中的金属质量推算，每槽可产铁氧体粉料（∑MexOy）0．548t，每年铁氧体粉料产量为493t，基本达到设计能力。工业试验中以共沉淀粉制成的铁氧体样环的磁性能，除个别高温高频功耗，其余均达到日本TDK公司PC30产品质量指标。     

锰锌铁氧体粉制备技术综述

综述了近几年来软磁铁氧体粉 (特别是锰锌铁氧体粉 )的制备方法、研究现状及应用前景     

无铁渣湿法炼锌提铟工艺

提出了一种锌、铟清洁生产工艺,该方法在保留传统湿法炼锌主体流程的前提下,利用铁闪锌矿精矿的铁资源、部分锌源及锰矿的锰源,直接制备高档次的锰锌软磁铁氧体材料。工艺过程包括:中浸渣高温高酸浸出、还原及除铜、萃取提铟、初步净化、深度净化及开路锌、共沉淀、铁氧体制备等。本方法取消了湿法炼锌流程中的除铁过程,作到铁渣和SO2的零排放,简化了湿法炼锌提铟流程,大幅度提高铟锌回收率;同时解决了"直接共沉淀法"铁源的长期供应问题。     

共沉淀法制备锰锌软磁铁氧体前躯体共沉过程中钙、镁深度脱除的热力学分析

通过对Fe(Ⅱ)-Mn(Ⅱ)-Zn(Ⅱ)-Ca(Ⅱ)-Mg(Ⅱ)-NH3-NH4HCO3-H2O体系的热力学分析，得到各金属离子浓度与pH的关系，从而确定共沉法制备锰锌软磁铁氧体前躯体共沉过程中钙、镁深度脱除的共沉区域。热力学分析结果表明，溶液中钙、镁的含量随着体系pH的增大而降低，在相同条件下镁的溶解度大于钙的溶解度。为减少进入共沉粉中的钙、镁含量，需要保证在铁、锰、锌共沉完全的基础上降低体系的pH。当溶液中[C]T=0．1mol／L，[N]T=1．0mol／L时，pH控制在6．23～6．50之间可以大大降低进入共沉粉中的钙、镁含量。确定共沉过程钙，镁深度脱除的共沉区域，对于生产高纯锰锌软磁铁氧体前躯体具有重要的指导意义。     

镍锌铁氧体粉体合成新方法

本文研究了共沉淀法合成镍锌铁氧体粉料,在测定镍锌铁碳酸盐及氢氧化物溶解度曲线基础上研究共沉淀时各种因素对粉体组成及质量的确定了制备镍锌铁氧体共沉粉的工艺条件。     

Investigation on Preparation of Ni-Zn Ferrite Powders by A New process

本文研究了共沉淀法合成镍锌铁氧体粉料,在测定镍锌铁碳酸盐及氢氧化物溶解度曲线基础上研究共沉淀时各种因素对粉体组成及质量的影响,确定了制备镍锌铁氧体共沉粉的工艺条件。     

共沉法制备锰锌软磁铁氧体前躯体的热力学分析

通过对Fe(Ⅱ)-Mn(Ⅱ)-Zn(Ⅱ)-CO3^2-NH3-H2O系的热力学分析，得到各金属离子浓度与pH值的关系，从而确定共沉法制备锰锌软磁铁氧体微粉的共淀区域。热力学分析表明，三者的共沉区域包含在Zn^3 沉淀完全的区域内．而Zn^2 沉淀完全的区域由[C]T和[N]T的相对关系所决定。此外，Fe^2 淀完全的区域只与[C]T有关。确定Fe^2 、Mn^2 、Zn^2 三者的共沉区域，对于锰锌软磁铁氧体微粉的生产具有重要的指导意义。     

热力学分析在制备锰锌铁氧体前驱体中的应用

通过分析对Me(Ⅱ)-NH3-C2O42-(HCO3-)-H2O(其中Me代表Fe,Mn,Zn)体系的热力学,得到各金属离子浓度与pH值的关系,从而确定共沉法制备锰锌软磁铁氧体微粉的共沉淀区域。热力学分析与试验结果吻合。共沉淀粉末煅烧后平均粒径2.0μm,烧结温度比普通干法制粉低40℃左右,制得的温敏锰锌铁氧体材料起始磁导率达4550H/m左右,温度灵敏度≤1.5℃,并在磁性温敏传感器中应用效果良好。     

锰锌软磁铁氧体微粉的液相合成研究进展

介绍了近年来锰锌铁氧体微粉的液相合成研究进展，和国内外各种锰锌铁氧体微粉的液相合成方法及各自特点。而锰锌软磁铁氧体微粉的合成方法是目前改善和提高铁氧体性能的重要手段。     

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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