帘线钢钢包渣线砖侵蚀分析和提高寿命的工艺措施

通过优化工艺：干砌砖缝≤0.5 mm,镁碳砖MgO含量≥75%,精炼渣中MgO含量≤20%,VD处理时 间由45 min降低到30 min,低粘度熔渣精炼时间由45 min降低至15 min以及用双渣线操作法,生产0.70～0.75C 帘线钢时,100 t LF(VD)的钢包渣线砖的使用寿命由15次提高到27次。     

钢包渣线用高性能镁碳砖的制备

分析了提高钢包渣线砖性能进而延长其使用寿命的措施,提出了钢包渣线用高性能铗碳砖的制备方案.制备的高性能镁碳砖的使用寿命比普通镁碳砖提高约13.5％.     

钢包渣线镁碳砖使用寿命的提高

钢包的使用寿命直接受渣线镁碳砖的影响,文章从渣线镁碳砖所用原料、添加剂、临界粒径、砖型等方面论述了提高渣线镁碳砖使用寿命的方法.     

低碳镁碳砖的研制和应用

结合包钢炼钢厂的实际情况,以C/S2的大结晶电熔镁砂和碳含量大于98%的石墨为主要原料,以金属铝粉和硅粉作为抗氧化剂,以热固性酚醛树脂作为结合剂,生产出了适合包钢精炼钢包用的渣线镁碳砖。并进行了整套渣线砖的现场试验,结果表明,新研制的渣线镁碳砖使用寿命比原来传统的镁碳砖使用寿命提高25%以上。     

宝钢用后废弃MgO-C砖的再生利用

随着世界环保、循环经济的发展,我国加大对用后废弃耐火材料开发利用的力度.文章概述了国内外用后耐材的基本状况,详细介绍了宝钢废耐材资源的情况,并对用后废弃转炉钢包镁碳砖进行了深入的研究开发,同时还探讨了其它几类废耐材的利用方法.开发成功的优质再生镁碳砖,试验研究发现无论在使用中的表现和使用寿命还是用后残厚均与目前使用的镁碳砖无差别,其使用性能已达到目前宝钢炼钢厂正常使用镁碳砖的水平,能满足多种精炼工况条件下大型钢包的要求.在宝钢300 t钢包渣线上的使用取得了良好效果.     

钢包耐火材料对帘线钢82A夹杂物的影响和工艺改进

帘线钢82A经80 t LD-LF-CC工艺冶炼,分析发现钢包耐火材料对钢中Al含量有明显的影响。通过采用两种钢包耐火材料(镁碳砖和镁Al碳砖)进行工业生产。试验结果表明,精炼渣系碱度采用0.9,钢包采用镁碳耐火材料生产帘线钢82A,可以将钢中Al含量控制在0.001%以下,夹杂物控制在低熔点区,有利于提高帘线钢82A的质量,断丝率由原1%降至0.42%。     

铝镁碳砖在大型钢包上的使用

介绍了铝镁碳砖在宝钢连铸钢包中的应用情况,并对铝镁碳砖的蚀损特征作了分析研究。结果表明:(1)在出钢温度提高、钢液滞留时间长的条件下,300t钢包铝镁碳质包衬使用寿命提高到50次以上,最高达102次。(2)铝镁碳砖的蚀损主要是由于氧化脱碳所致。蚀变层中镁铝尖晶石的形成,提高了砖的抗侵蚀性能。(3)铝镁碳砖永久微残余膨胀特性使包壁整体性良好,这给包衬解体带来很大方便。     

帘线钢用钢包渣线砖的研制和应用

针对帘线钢用钢包渣线砖不抗侵蚀、寿命低的问题以及渣线使用镁钙喷补料因喷补料MgO含量高,造成钢水中夹杂物多的问题,以大结晶镁砂为骨料,采用优质结合剂,配以多种添加剂技术,开发了新型钢包渣线砖。应用表明,新型钢包渣线砖具有良好的抗渣性、耐侵蚀性和安全性,使用寿命一次不喷补可达到10炉以上,且降低了钢中脆性夹杂物数量。     

提高钢包渣线使用寿命技术措施

分析了50t钢包渣线耐材侵蚀原因,通过采取稳定精炼渣系、改进钢包砌筑及烘烤方法、优化生产组织流程等技术措施提高了钢包渣线使用寿命,由原来的不足15次提高到现在的21次。     

铝镁碳砖及其在钢包上的应用

本文介绍了试用铝镁碳砖砌筑钢包获得成功。试用结果表明,高温性能良好、抗渣性强、耐侵蚀、耐冲刷,使用寿命长平均为50～70次,较用粘土砖包衬提高5～7倍,较高铝砖提高3～5倍,是一种适宜钢包使用的优质耐火材料;修砌工艺简单,拆修容易,便于推广使用。     

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)

正~~     

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)

正~~     

China's Major Non-ferrous Metals Imports & Exports

正~~