电渣用碳质引弧剂的试制及应用

攀钢集团长钢公司标准Ti≤0．03％的低钛钢在电渣重熔过程中由于使用钛质引弧剂作为电渣导电引弧，导致电渣成品钢锭大头Ti高而产生大量废品。我们研制出一种碳质引弧剂代替钛质引弧剂用于电渣引燃渣料进行重熔生产，通过试验证明，采用碳质引弧剂引燃渣料进行重熔生产，电渣锭大头增Ti得以解决。     

21世纪电渣冶金的新进展

电渣技术经过46年的发展，已形成“电渣冶金”新学科，包括电渣重熔(ESR)、电渣熔铸(ESC)、电渣转注、电渣浇注、电渣离心浇铸、电渣热封顶、电渣焊接和电渣复合等。目前世界电渣钢年生产能力120万t，用于生产低合金高强度钢、轴承钢、工模具钢、不锈耐热钢和高温合金。最大电渣锭重200t，正在设计建造360t电渣重熔炉。高压电渣重熔(PESR)和真空电渣重熔(VacESR)使重熔金属质量达到高纯水平。电渣热封顶生产的大型电渣锭成本是普通电渣锭生产成本的1／4，具有技术和经济上的潜在优势。述评了优质大型电渣锭制备，真空电渣重熔、高压电渣重熔，快速电渣重熔技术的进展和电渣重熔炉型的发展趋势。     

电渣重熔超低硫巨型钢锭

生产超低硫大钢锭技术是近十年来炼钢的主要进展。本文介绍充分发挥电渣冶金的强制脱硫优势，开发了重熔百吨以上锻件用巨型电渣锭获得超低硫(≤0．0020%)的电渣重熔技术。将其应用于200t电渣炉，迄今巳连续生产不同钢种90～180t电渣锭数十报，最大锻件约180t。产品中的硫含量不超过0．0020%，部分产品低选0．0005％。应用超低硫技术不增加生产成本。     

用堆底法加回渣引弧生产微铬的试验

介绍了用堆底法加回渣引弧生产微铝合金的试验情况，分析了试验降碳未达预期目的原因，指出热兑法还是目前生产微铬合金的好方法。     

GH901合金采用电渣重熔工艺时Ti含量的控制研究

主要讨论了GH901合金采用电渣重熔工艺时，不同Ti含量的母材在电渣重熔过程中经过脱氧荆添加量的调整冶炼出合格的电渣锭，进而得出该合金采用电渣重熔工艺时根据母材Ti含量的不同，添加合理的脱氧剂量。     

渣成分对高温合金0Cr15Ni25Ti2MoAIVB电渣重熔Ti烧损率和钢锭表面质量的影响

试验分析了2．5t电渣炉使用4种成分熔渣重熔0Cr15Ni25Ti2MoAIVB合金时的Ti烧损率。试验结果表明，4种渣系中75％CaF2-15％Al2O3-10％CaO三元提纯渣的Ti烧损率最低，为7．0％，并且避免了70％CaF2-30％Al2O3的二元渣系重熔钢锭表面渣沟等缺陷。     

渣成分对合金0Cr15Ni25Ti2MoAlVB电渣重熔Ti烧损率和钢锭表面质量的影响

试验分析了2．5t电渣炉使用4种成分熔渣重熔0Cr15Ni25Ti2MoAlVB合金时的Ti烧损率。试验结果表明，4种渣系中75％CaF2-15％Al2O3-10％CaO三元提纯渣Ti烧损率最低，为7．0％，并且避免了70％CaF2-30％Al2O3的二元渣系重熔钢锭表面渣沟等缺陷。     

1Cr18Ni9Ti不锈钢1.2 t锭电渣重熔过程[Ti]烧损控制的实践

统计分析了1Cr18Ni9Ti钢1.2 t锭电渣重熔过程母材中的Ti含量-[Ti](0.586%～0.839%Ti)、渣中TiO₂含量(2.1%～4.8%TiO₂)和填充比(0.2～0.4)对[Ti]平均烧损值的影响。结果得出,电渣重熔过程电渣锭下部[Ti]的烧损较上部严重;随母材[Ti]的提高,电渣锭中平均烧损[Ti]降低;随渣中TiO₂含量-(TiO₂)提高,电渣锭下部[Ti]的平均烧损β值增加,而电渣锭上部β值没有明显变化,(TiO₂)不宜超过2%;提高填充比有利于抑制[Ti]烧损。     

GH3030合金电渣重熔Al、Ti成分控制分析

对GH3030合金电渣重熔成Ф50mm钢锭，第1批试制生产电渣锭烧Ti增Al的主要原因进行了分析讨论，得出：在电渣重熔初期，渣中TiO2含量很低，而AlO3含量很高，为保持平衡常数KT为一定值，化学反应：3[Ti]＋2（AlO3）□4[Al]＋3（TiO2）向右进行，在钢锭下部[Ti]把渣中（AlO3）的（Al^3＋）还原成[Al]而进入钢中，使钢锭大头端Al成分不合格，为此采取向渣中加入一定量的TiO2粉，能使钢锭Al、Ti成分得到有效控制。     

高碳铬轴承钢GCr15中钛含量的控制

简述了高碳铬轴承钢Ti含量的影响,分析了影响高碳铬轴承钢GCr15中钛含量的因素,提出了通过控制电炉终点碳、精炼渣成分、使用低钛的合金及渣料等控制措施,生产出Ti含量小于30×10-6的高碳铬轴承钢GCr15。     

China's Major Non-ferrous Metals Imports & Exports

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Zinc Production by Province in 2014

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80% of Chinese Firms Purchasing Overseas Mines Ended up in the Red

<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic     

Copper Processing Profit Dropped Sharply,Copper Consumption Will Face Impact in the Second Half of the Year

正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field,     

Central Geological Prospecting Fund Newly Added 16.47 Million Tonnes of Bauxite in 2013

正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF     

Manufacturers of Copper Tube for Central Air Conditioner Use Face Mounting Pressure in the Final Quarter of the Year

正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure     

Xinjiang Ranks No.1 in Production of Primary Aluminum in China

正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year,     

Shenhuo Coal Industry and Electricity Power Completed800,000 t/a Aluminum Project in Xinjiang

正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform.     

Guangdong Metal Transaction Center has Become the Second Largest Precious Metal Transaction Platform Nationwide

正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness.     

Seven Rare Earth Projects Involving Close to 3 Billion Yuan Investment Landed In the HighTech Zone

正On May 22,Baotou Rare Earth Industry Cooperation Consultation MeetingProject Agreement-signing Ceremony was held in Ningbo,nearly 40 enterprises from Ningbo,Guangdong,Hunan,and Shanxi participated in project consultation.After multi-lateral communication,agreements were signed for a total of 7 rare earth projects successfully.