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转炉渣用于铁水预脱磷的工艺实验 总被引:1,自引:0,他引:1
研究了转炉渣剂的组成及相关工艺因素对铁水脱磷率的影响。结果表明:为降低转炉渣的熔化温度以适应铁水预处理温度的要求,转炉渣的CaF2添加量应控制在15%~20%;采用80%的转炉渣和20%的CaF2配制的转炉渣剂对铁水进行脱磷处理时,脱磷率可达到78%左右;另外,转炉渣剂中的P2O5能显著降低铁水脱磷率。 相似文献
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转炉炼钢产生大量的粉尘,严重污染环境,各国均在努力寻求粉尘的处理方法.在一定的工艺条件的基础上,研究了粉尘脱磷剂内在组分对铁水脱磷的影响,分析了各组分对铁水脱磷的影响规律.结果表明:氧化铁皮作氧化剂脱磷效果仅次于Fe2 O3试剂,脱磷率分别为84.78%和84.32%,Na2CO3和BaO作固定剂效果均比CaO好;使用质量分数为4%CaF2+6%Na2 CO3作助熔剂可使脱磷率达到89.13%;控制铁水初始硅的质量分数在0.09%~0.15%可以提高铁水脱磷率;脱磷剂中的P2O5会显著降低脱磷剂脱磷率.因此,使用粉尘研制的脱磷剂可在氧化剂、固定剂和助熔剂方面进行优化,同时控制铁水初始硅含量和减少粉尘带入的P2O5含量,可提高脱磷剂脱磷能力. 相似文献
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在先前的研究中,作者发现磷在铁水预处理炉渣中存在明显的偏析现象,其以Ca3P2O8-Ca2SiO4固溶体形式存在于CaO—SiO2-MnO—Mgo基体中。由于每个相的磁性完全不同,在超导强磁场的作用下,有可能将每个相分离出来。通过对粉碎的炉渣实施强磁场作用,可从炉渣中回收大约60%以上的含磷相,磁场强度为0.5~2.5T。如果从炉渣中去除大多数磷,剩余炉渣将为含有少量P2O5,的FeO—CaO—SiO2-MnO—Mgo,因此可能将其再次循环到炼铁和炼钢工艺中,例如烧结,铁水脱硅和铁水脱磷工序。本文根据物料平衡计算模拟了残余炉渣再循环时对脱磷工艺的影响。通过数学模型对磷的回收和残余炉渣作为脱磷剂的分析,结果证实产生的总炉渣量以及投入的CaO量明显减少。采用废物投入一产出模型,分析从脱磷炉渣中回收磷以及将残余炉渣再次返回到铁水脱磷工艺具有巨大的环境和经济效益。 相似文献
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为开发高效环保的高磷铁水预脱磷剂,利用FactsageTM软件绘制了Fe3O4-CaO-B2O3和Fe3O4-CaO-K2O三元相图,根据相图确定出B2O3系和K2O系脱磷剂成分的质量分数,然后在实验室进行脱磷试验,并与以CaF2为助熔剂的高磷铁水预脱磷试验结果进行了比较。结果表明:B2O3能够完全替代CaF2作为助熔剂进行高磷铁水的脱磷预处理,控制w(P)<0.1%,此时w(B2O3)/w(CaO)=0.16,用此种脱磷剂进行脱磷时,化渣良好且不产生泡沫渣,脱磷率也最高。而K2O系脱磷剂的脱磷效果较差。 相似文献
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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。 相似文献
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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. 相似文献
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《China Nonferrous Metals Monthly》2014,(12)
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 相似文献
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《China Nonferrous Metals Monthly》2014,(10)
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 相似文献
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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 相似文献
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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. 相似文献
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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 相似文献
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