感应钢包炉的电磁特性与结构优化

感应钢包炉是国外新发展的二次精炼与加热设备，具有高效低耗、无污染等优点。在电磁场与包壳结构数值分析的基础上，探讨了感应钢包炉熔炼过程的电磁特性，依此提出了改进的感应钢包炉包壳结构。模拟显示，新的包壳结构可使钢包炉的电热效率提高８％～１０％，使钢包炉的总能耗降低５％，且包壳的分瓣数可控制在４～８，有利于提高包壳的力学性能和钢包炉运行的安全性     

LF（钢包炉）固体合成渣脱硫工业性试验研究

以３０ｔＥＢＴ超高功率电炉为初炼炉和４０ｔＬＦ（钢包炉）作为精炼炉，使用ＣａＯ－ＣａＦ２系固体合成渣对Ｑ２３５钢进行钢包炉内脱硫工业试验，在本试验条件下，当ＥＢＴ电炉初炼钢液（Ｓ）初＝０．０３５％～０．０８１％时，最佳精炼渣碱度Ｒｂ＝（％ＣａＯ）／（％ＳｉＯ２）为２．０～２．６或Ｒｆ＝（％ＣａＯ）＋（％ＭｇＯ）／（％ＳｉＯ２）＋（％Ａｌ２Ｏ３）为１．５～２．０，渣指数（ＣａＯ）／（ＳｉＯ２）：（Ａ     

吹氩钢包内钢液流速的实际测定和理论计算

本文介绍利用紊流下形阻系数近于常数的条件，对６０ｔ吹氩钢包内的主流股流速进行实际测量的原理、方法和结果，结果表明，包内钢液的主流股流速数量级为１０＾－１￣１０＾０ｍ／ｓ，常在０．１￣０．４ｍ／ｓ间波动，并与（ｇＱ０）＾１／３成线性关系，在实测基础上，利用Ｎａｖｉｅｒ－Ｓｔｏｋｅｓ方程和ｋ－ε紊流模型通过ＳＩＭＰＬＥＲ方法对钢液流动进行了计算，计算结果与实测数据基本相符。     

埋弧法精炼技术的应用

在电弧炉还原期的使用结果表明，开发出的埋弧渣产品，能使炉渣高度增大一倍，平均脱Ｓ率为７４．９％，并有一定的脱Ｐ效果。在钢包炉（ＬＦ）上的使用表明，渣厚增大一倍以上；升温速度由１～２℃／ｍｉｎ提高到３～４℃／ｍｉｎ；平均精炼时间节约了１２ｍｉｎ；钢包寿命显著提高；节电３．７ｋＷｈ／ｔ钢；平均脱Ｓ率４５％。     

底吹位置对110tANS—OB钢包熔池混合效果影响的水力学模型研究

采用水力学模型实验法对１１０ｔＡＮＳ－ＯＢ钢中底吹位置对熔池混合效果的影响进行 研究，结果表明，在浸罩条件下，偏心底吹优于中心底吹，中小流量下，底吹位置对熔池混合效果影响较大，而在大流量下，底吹位置对其影响较小，１１０ｔＡＮＳ－ＯＢ钢包混合效果良好的底吹位置为ｒ／Ｒ＝０．３０～０．５９，其中ｒ／Ｒ＝０．５９处较佳。     

关于转炉溅渣护炉的几个工艺问题

分析总结了国内转炉溅渣护炉的生产经验，提出：①溅渣护炉的合理渣量为：Ｑｓ＝０．３０１Ｗ＾ｎ（ｎ＝０．５８３￣０．６３０）；②转炉参数与合理溅渣参数的关系为：Ｈ·ｄ／Ｄ＝１６．２４＋０．６０（Ｑ·ｈ／ｄ）＾０．３３·ｔ；③适宜溅渣的合理终渣成分为：Ｒ＝２．８￣３．５，（ＴＦｅ）＝１０％￣１５％，ＭｇＯ〉８％；④转炉出钢温度对炉龄的影响为：ｎ＝２０８５２９－１２０．９ｔ。     

钢包喂钛线生产20CrMnTi钢的试验

采用ＧＧＮ－２ＷＸＪ喂线机向２０ｔ钢包喂入φ１０ｍｍ钛线，喂线速度按１２０￣１３０ｍ／ｍｉｎ，钛的回收率达６５％￣８３％，平均为７３．４％，通过喂入１９０￣２０００ｍ钛线，喂线时间９０￣９５ｓ，成品钢水钛含量可稳定在０．０６％￣０．０８％，喂线前后钢包钢水平均温降速率为１６．７℃／ｍｉｎ，而还原期炉内加钛铁合金化工艺，钛的回收率为２９％￣５５％，平均为３７．５％，喂钛线工艺吨钢冶炼成本降低２８．２     

30 t电弧炉的二次精炼工艺

１　偏心底出钢电弧炉和钢包炉１．１　偏心炉（ＥＢＴ）本钢公司二炼钢分厂将原８＃炉改造为偏心底出钢电弧炉,偏心炉的主要设备参数：　　　公称容量／ｔ３０　　　平均出钢量／ｔ３６　　　残留钢水量／ｔ１～２　　　变压器容量／ｋＶＡ１２５００　　　电极直径／ｍｍ４５０　　　出钢最大倾角／°１２　　　中心距／ｍｍ２００５　　　出钢直径／ｍｍ１３０　　　一次电压／Ｖ３５０００　　　二次电压／Ｖ３４０～１２０　　　一次电流／Ａ２１０００　　　二次电流／Ａ２１０００１．２　钢包炉（ＬＦ）参数　　额定容量／ｋＶＡ６…     

直流钢包炉试验研究

介绍了在０．５ｔ单电极直流电弧炉上所做的三电极直流钢包炉的电弧行为加热速度的试验情况。试验表明，三电极直流钢包炉技术可解决底电极式直流钢包炉的存在的不足，使炉子加热速度快和不发生偏弧现象。     

提高LF精炼钢包寿命的措施

精炼温度高造成渣线侵蚀严重以及炉渣对耐火材料的侵蚀，是影响精炼钢包寿命的主要原因。石横特钢厂采取稳定精炼初始温度；加强中间包烘烤；采用埋弧渣技术，制定合理的分钢种精炼温度等措施，使精炼钢包的平均使用寿命比４８炉次提高到５３炉次，耐火砖消耗降低了０．７９ｋｇ／ｔ钢。     

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.