利用BP神经网络预测AOD炉冶炼含氮不锈钢氮含量

根据AOD炉吹氮气冶炼含氮不锈钢的生产条件,运用BP神经网络建立了含氮不锈钢氮含量预测模型和吹氩时间预测模型。模型可利用生产现场的实际操作数据预测钢中氮含量,并可预测冶炼过程中控制钢中氮含量所需要的吹氩时间。结果表明,预测结果准确率较高,模型适用性较强。     

基于回归分析法的400系不锈钢吹氩脱氮工艺研究

400系不锈钢中的氮能恶化晶间腐蚀、低温冲击韧性、缺口敏感性和焊接等性能,在低耗、高效前提下降低氮含量成为AOD炉冶炼中的重要课题。分析了400系不锈钢冶炼中的脱氮原理,采用不同吹氩工艺研究了0Cr13钢、0Cr17钢、1Cr13钢的吹氩量与AOD炉终点氮含量的对应关系。探讨了用回归分析法确定400系不锈钢吹氩脱氮工艺控制合适的吹氩量、氮氩切换点,并进行了生产试验。     

优选钢液初始碳含量工艺参数,提高AOD炉还原期电解锰回收率

根据冶金反应热力学原理,结合AOD炉冶炼铬锰氮奥氏体不锈钢的生产数据进行回归分析和标准偏差分析,优选出有利于提高AOD炉还原期电解锰回收率的钢液初始碳含量工艺参数.     

运用最小二乘法,建立AOD炉工艺参数及合金成分对还原期增氮影响的数学模型

在AOD炉中冶炼铬锰氮奥氏体不锈钢,通过对不同的冶炼控制工艺参数和不同的合金成分在实际生产中对还原期增氮后影响氮含量的不同情况,运用最小二乘法来进行数理统计分析,建立起符合本企业AOD炉冶炼该钢种的增氮工艺参数控制的数学模型.     

AOD炉冶炼含氮不锈钢氮合金化工艺模型及应用

本文介绍了AOD炉运用氮气在不锈钢中溶解与脱除理论所建立的氮合金化工艺模型，及该模型在18t、40tAOD炉上冶炼0Cr19Ni9N等含氮不锈钢种的应用。     

AOD炉冶炼含氮不锈钢氮成分控制的研究

对氮在不锈钢熔体中溶解的热力学和动力学行为进行了理论分析,指出氮在不锈钢熔体中溶解度随钢水温度降低和铬、锰、钼含量增加而升高,而随着镍和碳含量的增加而降低;对AOD炉冶炼不锈钢吹氮合金化工艺控制模型进行了理论研究和实际应用,指出在AOD炉中氮含量随着钢水碳含量、温度、供氧强度、吹氩强度的变化而变化,该工艺适合冶炼钢种的氮含量小于该钢种在常压下理论氮溶解度的90%,为保证氮成分精度,以小于80 %为宜.     

AOD炉冶炼含氮不锈钢氮合金化工艺开发

介绍了AOD炉运用氮气在不锈钢中溶解与脱除理论所开发的氮合金化工艺。在40tAOD炉上冶炼0Cr19Ni9N,0Cr19Ni9NbN,1Cr17Mn6Ni5N,00Cr18Ni5Mo3Si2（N）,00Cr22Ni5Mo3N等舍氮不锈钢钢种。不需在线分析钢中氮含量，较为准确地预测与控制钢中氮溶解度值及舍氮不锈钢成品的氮含量。     

宝钢不锈钢AOD炉侧吹工艺优化

通过对AOD炉冶炼不锈钢冶金过程进行动力学分析和数学模拟,阐述了AOD炉脱碳保铬过程的基本特征。根据AOD炉脱碳保铬时的临界碳含量,调整了宝钢不锈钢AOD炉的侧吹工艺,结果表明,AOD炉氧气利用率和铬元素收得率均有较为显著的改善。     

AOD炉气路过程控制

氢氧精炼炉(以下简称AOD炉)是近十多年来在我国发展起来的一种不锈钢冶炼方法。它以冶炼成本低,钢的纯度高等优点被冶金、机械制造等行业所重视并推广应用。由于AOD炉特殊的工艺要求,采用微机进行自动控制便成为冶炼过程的重要环节。     

铝镇静钢浇余渣在AOD炉冶炼的应用

介绍了AOD炉冶炼不锈钢的工艺特点,阐述了冶炼过程中导致渣料、还原剂消耗量大的根源。以降低AOD炉物料消耗为目的,利用铝镇静钢浇余渣高熔点、低碱度的特点,通过调整冶炼工艺和工业试验,将铝镇静钢浇余渣应用到AOD炉冶炼不锈钢过程中。试验表明:将铝镇静钢浇余渣加在AOD炉还原期能够替换部分石灰,有效地解决了AOD炉冶炼过程热量不足导致Cr元素高氧化的问题;通过数据分析和对比得出最佳使用量为20~30 kg/t,由此可降低石灰10~15 kg/t、硅铁4~6 kg/t、萤石3~5 kg/t,吨钢成本降低约35元,工序能耗大幅下降。     

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.