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肖尊湖 《金属材料与冶金工程》2006,34(2):27-32
讨论了涟钢CSP(compactstripproduction)生产线钢水脱氧和控制工艺。根据钢水从转炉—吹氩—LF精炼—连铸各工序中氧含量的变化情况,对现行铝脱氧工艺进行了改进。出钢后通过采取钢水全程吹氩,钢水浇铸时,在大包—中间包采用长水口 氩气密封,结晶器采用浸入式水口 保护渣控制措施后,成品钢水中全氧含量得到了有效控制,其含量在35×10-6的水平,满足了CSP工艺对钢水的质量要求。 相似文献
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研究了西宁特钢50 t EAF EBT-60 t LF冶炼GCr15高碳铬轴承钢时电弧炉泡沫渣操作、钢包炉(LF)吹氩精炼和成分微调、浇铸等工艺因素对钢中氮含量的影响.研究结果表明,电弧炉良好的泡沫渣操作,钢水脱碳量ΔC大于0.6%可使钢中氮含量降到(10~20)×10-6.在LF精炼时50 t钢水加200 kg碳粉可使钢水氮含量增加19×10-6,加合金可使钢水中平均氮含量增加4.2×10-6,浇铸过程钢水氮含量增加12×10-6.因此在LF精炼时减小碳和合金加入量可减少钢中氮含量的增加. 相似文献
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本钢铁水预处理-转炉-二次精炼流程钢液硫含量控制实践 总被引:2,自引:0,他引:2
分析了本钢 15 0t高炉铁水预处理 - 15 0t转炉 -二次精炼 -连铸工艺生产的 80 0炉钢水的硫含量的变化。通过喷CaO粉和加Mg粉高效脱硫的铁水预处理能将铁水中平均硫含量从 35 0× 10 -6脱至 5 0×10 -6。在转炉冶炼中 ,因加入含硫废钢和石灰以及精炼前钢水带有少量转炉渣 ,使成品钢水硫含量增至 15 0×10 -6。研究和分析了铁水预处理时 ,石灰喷入量和Mg粉加入量对铁水脱硫的影响。 相似文献
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介绍真空脱气炉的控制系统,以及真空脱气的操作要点等.杭钢电炉钢水经真空脱气处理后,[H]可降到2×10-6以下,[N]降至80×10-6以下,吨钢收益明显增加. 相似文献
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超洁净钢和零非金属夹杂钢 总被引:3,自引:0,他引:3
应针对不同钢种和用途 ,应用相应的精炼技术 ,达到超洁净钢对纯净度的要求 ,诸如超低硫钢要求 [S]≤ (5~ 10 )× 10 - 6 ,超低磷钢 [P]≤ 2 0× 10 - 6 ,低氮钢 [N]≤ 2 0× 10 - 6 ,显微夹杂钢要求钢中夹杂物尺寸≤2 0 μm等。零非金属夹杂钢为钢中夹杂物高度弥散、夹杂物尺寸≤ 1μm的钢。从理论上分析了零非金属夹杂钢制备的可能性。探讨了采用冷坩埚真空感应悬浮熔炼制备零夹杂钢的冶金工艺。采用中频感应炉熔炼 ,真空感应炉初精炼 ,真空凝壳炉或真空电子束熔炼深精炼可使超洁净钢中的Alsol<10× 10 - 6 ,[S]<10× 10 - 6 ,[T .O]<2× 10 - 6 ,[N]<15× 10 - 6 。 相似文献
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90t钢包精炼炉精炼系统工艺优化研究 总被引:1,自引:0,他引:1
本文从热力学和动力学的角度分析了ASEA-SKF精炼过程,并对精炼工艺进行了优化,得到了稳定的产品质量,使高碳([c]≥0.60%)钢中T.O平均<15×10~(-6)、[s]<0.010%、夹杂总量为0.0023%。 相似文献
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轴承钢非真空精炼工艺及其冶金效果 总被引:1,自引:0,他引:1
采用“50tEF——60t钢包——低碱度包面渣——吹氩搅拌精炼——下注3.0t锭工艺”,生产高碳铬轴承钢,氧含量可降低到7.0~15.0×10~(-6)平均达10.0×10~(-6);A类夹杂物波动在0.5~2.50级,平均1.35级;B类夹杂物波动在0.5~2.0级,平均1.24级;不出现D类夹杂物。这一方法的优越性在于勿需添置价值昂贵的真空装置,去除夹杂物的效果与真空精炼无异。但也有它的局限性,脱氢效果较差。 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