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介绍了天津钢管公司150 t交流电弧炉将变压器扩容至100 MV.A的工程实践,根据原有90 MV.A变压器的电弧炉炼钢电气运行的结果和经验,提出了超大容量变压器的电弧炉炼钢电气运行研究的流程为热试车前模拟研究、热试车研究、炼钢过程实际电气运行研究和生产运行研究。研究表明:考虑变压器的外特性的影响,在具体负载下输出的二次电压不能简单地以阻抗电压百分数来折算,应该以实测的电气运行参数为依据来设定电弧阻抗值。生产运行结果表明,100 MV.A变压器运行良好,冶炼电耗降低5 kW.h/t,冶炼周期缩短2 min。 相似文献
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介绍了天津钢管公司150 t交流电弧炉将变压器扩容至100 MV·A的工程实践,根据原有90 MV·A变压器的电弧炉炼钢电气运行的结果和经验,提出了超大容量变压器的电弧炉炼钢电气运行研究的流程为热试车前模拟研究、热试车研究、炼钢过程实际电气运行研究和生产运行研究.研究表明:考虑变压器的外特性的影响,在具体负载下输出的二次电压不能简单地以阻抗电压百分数来折算,应该以实测的电气运行参数为依据来设定电弧阻抗值.生产运行结果表明,100 MV·A变压器运行良好,冶炼电耗降低5 kW·h/t,冶炼周期缩短2 min. 相似文献
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摘要对中钢公司炼钢厂50t电弧炉炼钢生产实践中出现的冶炼电耗增加的现象进行了研究,从电弧炉炼钢供电制度的角度分析了其冶炼电耗增加的原因。研究中应用高精度仪表实测了电气运行参数,提出了合理的供电制度。推荐使用合适的工作点,采用高档位时,弧流不宜过大。建议随着原料条件及系统阻抗的变化,对不同的原料结构及系统状态,制定合理的供电曲线。生产实践表明,采用合理的供电制度可显著降低电耗。 相似文献
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交流电弧炉三相不平衡供电的研究 总被引:7,自引:0,他引:7
提出了三相操作电抗随无量纲电流变化的三相交流电弧炉电路模型,进而给出了适用于三相电流不对称,电压不对称和阻抗不对称情况的计算模型。基于上述三相交流电弧炉电路模型,分析了电流不对称和阻抗不对称对电弧功率的影响,并讨论了交流电弧炉三相电参数互相影响的复杂性。依据本模型可灵活实现三相交流电弧炉的平衡和不平衡供电,进而改善电弧炉的电气运行特性。 相似文献
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应用MATLAB语言的仿真功能,对创建的电弧炉数学模型在不同的电参数条件下进行仿真,形成电气图、供电效率曲线图和电气运行曲线图,结合约束条件,定量给出电弧炉合理的操作区间,为电弧炉运行优化和供电制度的建立提供理论支持。 相似文献
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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。 相似文献
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<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 相似文献
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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, 相似文献
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《China Nonferrous Metals Monthly》2014,(10)
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 相似文献
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《China Nonferrous Metals Monthly》2014,(10)
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 相似文献
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《China Nonferrous Metals Monthly》2014,(10)
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, 相似文献
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《China Nonferrous Metals Monthly》2014,(12)
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. 相似文献
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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. 相似文献