共查询到20条相似文献,搜索用时 62 毫秒
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K-OBM-S转炉是以铁水和电弧炉预熔钢液为原料冶炼不锈钢的精炼设备。以转炉冶炼普碳钢的顶吹模型和AOD法冶炼不锈钢模型为基础,建立了适用于80 t K-OBM-S转炉冶炼不锈钢的数学模型。对二步法冶炼2Cr13型不锈钢和三步法冶炼0Cr18Ni9型不锈钢的过程验证结果表明,大部分终点碳含量的误差≤±0.03%,终点铬含量误差≤±0.3%,110炉0Cr18Ni9钢目标碳(0.10%~0.25%)命中率为95.6%,终点目标铬(17.1%17.6%)的命中率为85.2%。 相似文献
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通过对生产控制的分析及研究,发现铁水经过 AOD 炉脱锰可满足导电纯铁对低锰铁水的需要;在相同工艺条件下,转炉终点碳含量越低,RH 炉脱碳效果越好。理论分析发现:转炉较低的碳氧积水平有利于终点 C含量的降低;较低的转炉终点温度、避免补吹和良好底吹效果,可保持较低碳氧积水平。利用正规溶液模型计算了碳-铁的选择性氧化临界碳含量范围,并考虑连铸工艺可浇性,控制转炉终点 C 含量,降低中包铝损及二次氧化。分析结果显示,邢钢转炉生产纯铁钢种理想的终点碳质量分数应控制在0·036%~0·045%。 相似文献
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基于自适应模糊神经网络系统的转炉终点磷的预报控制模型 总被引:6,自引:1,他引:5
根据冶炼工艺和现场数据 ,对转炉终点磷含量的预报方法进行了研究。采用自组织神经网络模式识别方法对 30 3炉现场数据进行了分类 ,分析了转炉冶炼各变量对终点磷含量的影响 ,确定了终点磷含量的控制变量 ,建立了基于自适应模糊神经网络系统的转炉终点磷含量的预报控制模型。研究表明 ,本模型能够对终点磷含量进行很好的预报和控制。模型计算值与实际值的相关性达到 0 .5 86 7;磷含量 (质量分数 ,% )控制在± 0 .0 0 3范围内的命中率达到 79.2 1%。该模型以低于目标值 0 .0 0 4 %的磷含量来对冶炼过程进行控制 ,冶炼合格率超过 91%。 相似文献
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应用改进的神经网络模型预报转炉冶炼终点 总被引:3,自引:0,他引:3
准确预报转炉冶炼终点的钢水温度与碳含量对提高转炉终点命中率具有重要意义。针对现有多层前馈网络学习算法的不足,基于BP模型提出一种改进算法,建立了复吹转炉冶炼终点的预报模型,并与BP模型的预测结果进行了统计比较。研究表明,改进后的模型能够对冶炼终点进行良好的预报。采用单节点输出模型对终点钢水碳含量与温度分别进行预报,预测误差w(Δ[C])<±0.03%的命中率达97.22%,Δt<±12℃的命中率为94.44%。还建立了神经网络双节点输出模型对转炉终点钢水碳含量及温度同时进行预报,误差Δt<±15℃、w(Δ[C])<0.03%的双命中率为76.92%。 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