CaO—MgOsat—FeOn—SiO2渣系与铁液间磷平衡分配比的极大值研究

按文献（１－４），ＬＰ与（ＦｅＯｎ）和Ｒ之间均有极值关系存在。本文得出从不同侧面的ＬＰ极值关系式和曲线：（１）按ＣａＯ／ＳｉＯ２＝０－０．９，０．９１－１．９和＞１．９三个区段划分的，用１／Ｔ、ｌｇ ｛（ＣａＯ）＋０．７（ＭｇＯ）｝，ｌｇ（裕疲搴停欤纾ǎ校玻希担┍泶锏囊淮味嘞钍剑唬ǎ玻┌矗茫幔希樱椋希玻剑埃埃埃梗埃保埃梗埃梗保保矗保矗保保购停荆保刮甯銮位值模茫     

高硅全粉矿高镁烧结研究

针对越钢烧结矿成品率低，强度差的问题，进行了大幅度提高烧结矿ＭｇＯ２含量的研究。结果证明，在高硅（ＳｉＯ２１５％），低铁（ＴＦｅ４９．０％），全粉矿烧结条件下，保持烧结矿ＣａＯ／ＳｉＯ２＝１．６左右，（ＣａＯ＋ＭｇＯ）／ＳｉＯ２＝２．０左右，ＭｇＯ＝５．５％－９．０％，可克服风化现象，显著提高烧结矿质量，获得强度高（转鼓指数７５％以上），还原性好（ＦｅＯ８％），成品率达到８０％的高镁优质烧结矿。     

LF（钢包炉）固体合成渣脱硫工业性试验研究

以３０ｔＥＢＴ超高功率电炉为初炼炉和４０ｔＬＦ（钢包炉）作为精炼炉，使用ＣａＯ－ＣａＦ２系固体合成渣对Ｑ２３５钢进行钢包炉内脱硫工业试验，在本试验条件下，当ＥＢＴ电炉初炼钢液（Ｓ）初＝０．０３５％～０．０８１％时，最佳精炼渣碱度Ｒｂ＝（％ＣａＯ）／（％ＳｉＯ２）为２．０～２．６或Ｒｆ＝（％ＣａＯ）＋（％ＭｇＯ）／（％ＳｉＯ２）＋（％Ａｌ２Ｏ３）为１．５～２．０，渣指数（ＣａＯ）／（ＳｉＯ２）：（Ａ     

（100）n－GaAs在H_2SO_4－H_2O_2－H_2O溶液中的腐蚀速度

以Ｃ－Ｖ测量、击穿电压测量并结合逐层腐蚀技术，对ＧａＡｓ外延多层结构的剖面分布进行了测量，获得了ＧａＡｓ（１００）晶片在不同温度下的Ｈ＿２ＳＯ＿４－Ｈ＿２Ｏ溶液中的腐蚀速度数据。结果表明，当Ｈ＿２ＳＯ＿４：Ｈ＿２Ｏ＿２：Ｈ＿２Ｏ＝９：１：１时，对ｎ＝１．１０￣（１４）～１．１０￣（１８）ｃｍ￣－３的ＧａＡｓ（１００）晶片，２０℃时的腐蚀速度为ｖ＝０．３～０．９μｍ／ｍｉｎ．作者认为，这一配方对ＧａＡｓ（１００）多层结构是一个最为理想的减薄腐蚀剂。     

用H2O2作还原剂稀硫酸浸出锰结核

在Ｈ＿２Ｏ＿２存在下用稀硫酸浸出太平洋锰结核，首先将高品位锰结核磨细至０．０７４ｍｍ，浸出条件：矿浆浓度ｌｇ／Ｌ、Ｈ＿２ＳＯ＿４浓度３．５×１０￣３～２５×１０￣（－２）ｍｏｌ／Ｌ、Ｈ＿２Ｏ＿２，浓度１．７×１０￣（－３）～２．６×１０￣（－２）ｍｏｌ／Ｌ、温度３０～９０℃。所得结果归纳如下含少量Ｈ＿２Ｏ＿２的稀Ｈ＿２ＳＯ＿４可于室温快速从锰结核中提取Ｎｉ、Ｃｏ、Ｃｕ和Ｍｎ，金属的提取率依赖于Ｈ＿２ＳＯ＿４和Ｈ＿２Ｏ＿２的浓度，缺少任何一种都不可能得到满意效果。该方法与以往的浸出工艺不同，金属的提取率随温度升高而下降。最佳条件下，各金属的提取不如下：Ｍｉ１００％、Ｃｏ９５％、Ｃｕ１００％、Ｍｎ１００％、Ｆｅ６０％。     

铱－钼酸盐－罗丹明B缔合显色反应的研究

在聚乙烯醇（ＰＶＡＶＡ）存在下,铱与钼酸盐和罗丹明Ｂ（ＲＢ）形成离了缔合物。缔台物的最大吸收位于５７０ｎｍ摩尔吸光系数ε８．３６×１０￣５’Ｌ·ｍｏｌ￣－１·ｃｍ￣－１,服从比尔定率范围为０～２．７５μｇｌｒ／２５ｍｌ。测定２．０μｇ铱的相对标准偏差为２．５％（ｎ＝７）,检出限４３ｎ／ｍｌ（ｎ＝１２）。测定铱的适宜条件为ＣＨＣｌＯ＿４＝０．９３ｍｏｌ／Ｌ,Ｃ＿ＭｏＯ￣２－＿４９．０×１０～－４ｍｏｌ／Ｌ,Ｃ＿ＲＢ＝３．３×ｌ０￣－５ｍｏｌ／Ｌ,ＰＶＡＯ０８％。试验了３０多种共存离子的影响,除形成杂多酸元素     

铁液中Al－N，Nb－N平衡的研究

采用取样法，在密封体系的ＭｇＯ坩埚中研究了铁液中Ａｌ－Ｎ，Ｎｂ－Ｎ反应平衡。得到氮在铁液中的溶解平衡常数ｌｇＫ＝－１１０６／Ｔ－０．７７１ｌｇＫ＿（ＡＩＮ）＝－９９０９／Ｔ＋３．８１ｌｇＫ＿（ＮｂＮ）＝－３４７００／Ｔ＋１８．３７     

P,Mn在BaO—BaF2—MnO渣和Mn—Fe—C—P熔体间的平衡分配

在１６７３Ｋ下，通过给定化学组成的ＢａＯ－ＢａＦ２－ＭｎＯ熔剂和Ｍｎ（～６０％）－Ｆｅ－Ｃ（１．１８％～６．４０％）－Ｐ合金间的平衡实验，确定锰铁合金中碳含量的变化对磷分配比ＬＰ和锰分配比ＬＭｎ的影响。结果表明，锰铁熔体中存在着一个临界碳含量［％Ｃ］＊，它对应着最大的ＬＰ和最小的ＬＭｎ。热力学计算表明，在本实验条件下，氧位控制环节对临界碳的存在和位置起决定性作用。而对于给定化学组成的ＢａＯ基熔剂，其相应渣系的磷酸盐容量值和锰酸盐容量值变化不大，分别为ｌｇＣＰ＝２４．８０±０．１５，ｌｇＣＭｎ＝９．０４±０．２４，它们对ＬＰ、ＬＭｎ的临界转变现象影响不大。     

铁水预处理脱硅对脱磷影响的实验研究

在实验条件下,利用Ｆｅ３Ｏ３－ＣａＯ－ＣａＦ２渣系研究了在高炉铁水预处理过程中脱硅对脱磷的影响。结果表明,在１６２３Ｋ温度下,脱硅渣中ｗ（Ｆｅ２）３）＝１６．８％～４０％进可获得终点ｗ（Ｓｉ）含量为０．１４４％～０．０９０％的脱硅效果;对初始「Ｓｉ」含量小于０．１５％的铁水,在１５７３Ｋ温度下,脱磷渣中ｗ（Ｆｅ２Ｏ３）＝４０％即可获得８５％以上的脱磷率,而在１６２３Ｋ温度下,脱磷渣中ｗ（Ｆｅ２Ｏ３     

铁水预处理温度下CaO－SiO_2－FeO－P_2O_5－CaF_2渣系中Ca

对１３００℃和１３５０℃的铁水预处理温度下ＣａＯ－ＳｉＯ＿２－ＦｅＯ－Ｐ＿２Ｏ＿５－ＣａＦ＿２渣系中ＣａＯ饱和溶解量进行了测定。实验结果表明，温度升高对提高ＣａＯ饱和溶解量有利；渣中ＣａＦ＿２、ＦｅＯ含量增加，ＣａＯ饱和溶解量减少；当渣组成位于ＣａＯ＋Ｌ和Ｌ交界上时，与其它区域相比，ＣａＯ达到饱和所需溶解时间最短。     

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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