CaO-Al2O3-SiO2基精炼渣LF脱硫的试验研究

在实验室小型试验炉内,用CaO-Al2O3-SiO2基精炼渣进行了钢水脱硫的试验,主要研究了精炼渣碱度、渣中Al2O3和CaF2对钢水脱硫的影响.结果表明:精炼渣碱度在2.85～3.45时,脱硫率在80％以上;精炼渣中w(Al2O3)=24％时,脱硫率为83.7％;随精炼渣中CaF2含量的增加,脱硫率先增大后降低.最佳精炼渣组成为:w(CaO)/w(SiO2)=3.0、w(CaF2) =7％、w(MgO)=6％、w(Al2O3)=24％.     

钢包精炼用石灰基调渣剂的脱硫实验研究

为提高钢包渣的脱硫能力,分别配制CaF2 CaO系和B2O3 CaO系的石灰基调渣剂,通过调质渣对钢液脱硫实验,分析了不同调渣剂配比对脱硫能力的影响。结果表明,CaF2 CaO系要控制w(CaF2)=10％～20％,B2O3 CaO系要控制w(B2O3)=25％～50％,符合该成分范围的２种调渣剂均能有效提高钢包渣的脱硫能力,进一步降低钢水中硫的质量分数。     

马钢铁水脱硫工艺实践

简介了马钢三炼钢厂1号脱硫站技术装备和主要工艺参数，对影响脱硫率的各种因素进行了分析。在铁水初始w(S)为0．010％～0．030％情况下，采用石灰、镁复合脱硫，脱硫率可达80％以上。并提出了三钢铁水脱硫站目前存在的问题及解决这些问题的相关建议。     

B2O3在CaO-BaO-SiO2-Al2O3-CaF2精炼渣中的作用

选择w（CaO）=46％，w（BaO）=10％，w（SiO2）=11．2％，w（Al2O3）=11．6％的渣作基础渣系，将B2q作助熔剂替代CaF2，发现B2q和CaF2的助熔效果相当，B2q可用作环保型助熔剂。将CaO-SiO2-BaO-Al2O3-CaF2作基础渣系，B2O3作酸性氧化物，在碱度（m（CaO＋BaO）／m（SiO2＋B2O3））为2．5和2．8时，研究B2O3替代SiO2后精炼渣的熔化性能。结果表明，B2O3替代25％的SiO2后就可大幅度降低粘度，并且发现富硼精炼渣的高温熔化性能稳定，粘度值稳定在0．3～0．5Pa·s。在碱度为2．8wt进行脱硫工艺实验，当w（SiO2）=20．6％时渣剂脱硫率为80％，当w（SiO2）=10．3％，w（B2O3）=10．3％时渣剂脱硫率为91．3％，主要原因是熔化性能良好的熔渣有助于提高传质速率。     

颗粒镁脱硫原理与工艺分析

采用颗粒镁脱硫代替CaO基脱硫是国内外发展的一种趋势，对颗粒镁脱硫进行了探讨。介绍了南京钢铁公司铁水脱硫站的技术装备和主要工艺参数，并对影响铁水脱硫效果的各种因素进行了分析。生产结果表明．用镁基脱硫剂具有较强的脱硫效果，脱硫率达80％左右，日处理铁水3万t。     

无取向电工钢硫含量控制技术研究

针对采用含钒铁水生产无取向电工钢存在的铁水脱硫率低、转炉冶炼过程回硫量大、成品硫含量偏高的问题,通过对含钒钛铁水脱硫,减少转炉冶炼过程回硫以及RH脱硫技术等方面的研究,大幅度降低了电工钢成品硫含量.生产表明钢中w(S)=0.001 9％～0.006 9％,平均为0.004 2％;w(S)≤0.008％的比例达到了100％,且w(S)≤0.005％的比例也达到了91.43％.     

铁水用预熔渣真空脱硫脱磷处理的研究

开展了铁水用石灰基预熔渣进行同时脱硫脱磷真空处理研究，试验结果表明，随着石灰基预熔渣中CaO含量增加，脱磷率和脱硫率均增大；随着渣中CaF2含量的增加，脱硫率呈下降趋势，脱磷率先下降而后出现上升情况；真空处理平均脱硫率为68．83％，平均脱磷率为78．46％，分别比常压处理平均脱硫率高26．95％，平均脱磷率低10．18％，但终点[P]含量接近，为冶炼低硫低磷钢提供优质铁水。     

流态化石灰的生产及在太钢铁水预处理站中的应用

采用物理钝化技术对活性石灰进行处理,研制出一种适用于铁水预处理脱硫用的流态化石灰产品。该产品流动性好、防潮性好、生产成本低,其防潮性可达到冷水浸泡2 h不吸潮溶解,储存期可达一年,产品w(CaO)90%,活性度为350 m L。此产品被应用在太钢铁水预处理复合喷吹脱硫中,很好地解决了石灰粉剂堵枪、下料不畅的难题,在平均铁水量为90 t、初始w(S)=0.028%、石灰粉消耗量平均为3 kg/t、镁粉消耗量平均为1 kg/t的条件下,铁水脱硫率平均可达94.61%,处理后的铁水w(S)平均为0.001 5%。     

KR铁水脱硫技术的应用

本文总结了 KR 搅拌式铁水脱硫枝术,在武钢第二炼钢厂10年来(1979～1989)的生产应用情况。介绍了该套脱硫装置的设备概况,脱硫操作工艺及影响脱硫效果的主要工艺因素。结合武钢生产实际,以 CaO 基脱硫剂代替 CaC_2脱硫剂以及对 CaO 基脱硫剂中活性炭作用的研究工作情况。     

铁水包喷吹Mg+CaO粉剂脱硫技术

分析了宝山钢铁股份有限公司采用TDS(Torpedo Car Desulphurization)、PTC(Hot Metal Pre-treatment Center)和铁水包单枪、双枪喷Mg+CaO脱硫模式的生产情况.结果表明,采用铁水包喷吹Mg+CaO脱硫在喷吹时间、脱硫效果、粉剂消耗、生产组织及经济效益等方面明显优于混铁车喷吹脱硫.脱硫时间可缩短50%以上,终点硫质量分数可达到0.001%～0.003%,粉剂总耗量仅为CaC2基粉剂耗量的50%、CaO基粉剂耗量的20%,综合成本比TDS或PTC混铁车脱硫低18%～30%.铁水罐双枪喷Mg+CaO脱硫模式的效果最好.     

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~~