基质组成对铝镁浇注料抗渣性能的影响

通过静态坩埚侵蚀实验,研究了铝镁浇注料的基质组成对浇注料的渣侵蚀和渗透深度的影响,并对其显微结构进行了分析.研究结果表明,增加镁砂加入量或采用具有较大颗粒的镁砂,可以提高铝镁浇注料的抗渣侵蚀性能;但增大镁砂的临界粒度或镁砂配比过高,浇注料基质部分产生疏松,渣在浇注料中的渗透深度增加.添加硅微粉在一定程度上恶化了浇注料的抗渣侵性能,但可以大幅度改善浇注料抗渣渗透性.水泥加入量对浇注料抗渣性的影响,呈现出与硅微粉相反的趋势.     

Cr2O3微粉加入量对Al2O3-SiO2浇注料性能的影响

以特级高铝矾土和棕刚玉为主要原料、纯铝酸钙水泥(Secar 71)为结合剂的Al2O3-SiO2浇注料为研究对象,研究了Cr2O3微粉加入量对其施工性能、强度以及抗渣性能的影响,结果表明:加入一定量的Cr2O3微粉后,浇注料的抗渣性能得到明显改善;并随着Cr2O3微粉加入量的增加,浇注料的强度逐渐增大;对浇注料施工性能影响不大.     

铁沟长寿命撇渣器用超低水泥浇注料的研究

选用复合硅微粉、超细硅微粉，加入到棕刚玉、97碳化硅、活性氧化铝微粉、纯铝酸钙水泥为主要原料的撇渣器浇注料中，就改善撇渣器浇注料承受流动高温铁水的剧烈冲击、侵蚀进行研究。讨论分析复合硅微粉、超细硅微粉的组合对撇渣器浇注料性能以及110℃×24 h、1 450℃×3 h热处理后常温性能以及1 450℃×1 h高温抗折强度性能的影响。研究表明：材料中加入2.0%～2.5%的超细硅微粉原料时，材料的常温耐压强度、高温抗折强度有显著提高。     

连铸钢包用高纯铝镁系浇注料的性能与损毁

针对钢包耐火材料的使用条件，研究尖晶石、镁砂、硅微粉及水泥对高纯铝镁系浇注料物理性能的影响，比较并探讨这类钢包新材料的性能变化特性及损毁机理。     

ρ—A12O3微粉在高纯铝镁浇注料中的应用

介绍了结合剂ρ—A12O3微粉的特性，对其结合高纯铝镁浇注料的流动性、强度和抗渣性进行了研究。     

MgO加入量对Al_2O_3-MgO浇注料抗渣性的影响

以电熔白刚玉为主要原料,同时加入电熔镁砂细粉、铝酸钙水泥、α-Al2O3微粉、Si O2微粉等,保持镁砂细粉与白刚玉粉总加入量一定,通过改变镁砂细粉的加入量,研究了镁砂细粉加入量对Al2O3-MgO浇注料抗渣性的影响。研究结果表明:在Al2O3-MgO浇注料中加入一定量的镁砂细粉,高温下可以形成镁铝尖晶石,从而提高浇注料的抗渣侵蚀性。当镁砂细粉加入量在2%～6%时,浇注料的抗渣侵蚀性能最好。     

LF炉水冷炉盖用浇注料的研制与应用

本文通过对无水泥铝镁浇注料的硅微粉加入量，镁砂加入量，膨胀剂和钢纤维的加入效果进行研究，研制出强度高，热震稳定性优异且施工性能良好的无水泥铝镁浇注料，将该浇注料用于炼钢厂LF炉水冷炉盖上，其使用效果优于低于水泥浇注料。     

硅微粉的加入对刚玉自流浇注料性能的影响

以再生刚玉(8~5 mm、5~3 mm、3~1 mm、≤1 mm)、棕刚玉(3~1 mm、≤1 mm)、白刚玉(≤0.074 mm)、α-Al2O3微粉(d50=1.82 um)、纯铝酸钙水泥及外加剂等为原料制作刚玉自流浇注料,研究了硅微粉的加入对刚玉自流浇注料性能的影响。结果表明:少量硅微粉的加入能够调节刚玉自流浇注料的重烧线变化率,提高刚玉自流浇注料的烘干强度、高温烧后强度、抗渣等性能,但是会降低刚玉自流料热态抗折强度。     

金属硅粉加入量对铁沟浇注料性能的影响

以电熔棕刚玉、SiC、α-氧化铝粉、硅微粉为原料,采用复合微粉、水泥和高温增强剂结合的Al_2O_3-Si C-C质铁沟料,试验了金属硅粉作为防氧化剂,对1 000℃×3 h、1 450℃×3 h烧后试样物理性能、抗折强度、抗氧化性及抗渣性能的影响。结果表明,随着金属硅粉加入量的增加,铁沟料线变化逐渐降低,体积密量升高,气孔率逐渐降低,抗折强度逐渐提高,抗氧化性提高,金属硅粉加入量在2%和3%时,抗渣侵蚀性能最好。综合考虑金属硅粉加入量以2%为宜。     

ρ-Al2O3微粉在高纯铝镁浇注料中的应用

介绍了结合剂ρ-Al2O3微粉的特性,对其结合高纯铝镁浇注料的流动性、强度和抗渣性进行了研究.     

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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