大冶诺兰达炉炉结形成及处理的探讨

通过对诺兰达炉炉结的洗炉,停炉后的测量,结合取样分析、生产中的观察,讨论了炉结形成的原因、洗炉的效果,得出了今后诺兰达炉生产中控制炉结的生成以及洗炉时应该注意的问题。     

加档坝后高炉炉缸内剪应力对侵蚀的影响

炉缸内铁水流动产生的剪应力对炉缸内衬的侵蚀有重要影响。为此,以流体力学有关理论为基础,建立了炉缸炉底三维流体数学模型,应用CFX软件,研究了不同时期的炉缸剪应力的变化;由于铁水环流对炉缸的侧壁以及炉缸侧壁与炉底交界部位的冲刷作用较强,因此在炉缸侧壁和炉底位置修砌一道环形档坝,观察其对炉底剪应力的影响。结果表明,炉底出铁口近端受到的剪应力较大,而在出铁口远端炉底剪切应力最小;炉底剪应力随着死铁层深度的增大而减小;增加档坝可以有效地减轻炉底受到的剪应力,炉底剪应力越大,增加档坝后减轻的炉底受到的剪应力值越大。     

首钢迁钢1号高炉长寿设计

通过讨论炉底炉缸长寿技术的发展历程,总结首钢高炉长寿经验,提出高炉炉缸炉底长寿设计的思想和理念——控制炉缸炉底的“象脚状”侵蚀,避开炉缸的过度侵蚀,使炉缸炉底侵蚀向“锅底状”侵蚀的方向发展。首钢迁钢1号高炉炉缸炉底的设计,结合数学模型计算,实现了长寿设计。     

长寿高炉炉缸和炉底温度场数学模型及数值模拟

高炉炉缸和炉底的寿命是影响高炉长寿的关键因素之一。实现高炉炉缸、炉底与高炉寿命同步的措施之一就是在高炉炉缸和炉底冻结一层渣铁壳。要想冻结渣铁壳,在高炉设计时应将1150℃等温线推离炉缸和炉底热面,这就需要计算高炉炉缸和炉底的温度场。为此讨论了目前应用于高炉炉缸和炉底温度场的一些数学模型,并在此基础上开发了通用的炉缸、炉底温度场计算软件。     

高炉炉缸炉底侵蚀判断模型

基于对炉缸炉底衬砖破损机理的分析,采用有限元法建立了炉缸炉底侵蚀判断数学模型。该模型用于推定炉缸炉底的1150℃等温线(侵蚀参考线),并结合知识库中的操作知识对护炉操作进行指导,以维护合理的操作炉型.     

基于案例推理的AOD炉能耗诊断系统

采用基于案例诊断技术对AOD炉能耗进行诊断,以AOD炉物料平衡和能量平衡为基础,引入载能体的概念,建立AOD炉的能值模型,对铁水比、废钢比、AOD炉处理时间和两炉间隙时间对AOD炉能值的影响进行模拟,确定其对AOD炉能值影响的权重,结合层次分析法确定各个影响因素的权重,采用案例推理技术对AOD炉能值进行诊断。将AOD炉能耗诊断系统应用到某不锈钢公司AOD炉上,诊断AOD炉能耗上升的因素,为降低AOD炉能耗提供了决策依据。     

在不停炉的情况下对固定式冶金炉炉拱的修复技术

通过对在不停炉的情况下对固定式冶金炉炉拱的修复技术论述,介绍这一技术的特点,对固定式冶金炉炉拱的修复提供了一个不同的思路。为提高固定式冶金炉的炉寿命,提高固定式冶金炉的各项技术指标,对提高企业的经济效益提供了有效保障。     

炉缸侧壁温度升高的原因分析及改进措施

介绍了1#高炉炉缸炉底结构的设计特点,结合炉缸炉底实测数据,计算了炉缸炉底1 150℃等温线的分布情况,分析了炉缸侧壁温度异常升高的原因,并提出改进措施,取得了良好的效果。     

长钢8号高炉炉缸炉底破损调查及长寿经验

对长钢8号高炉炉缸炉底破损调查及长寿经验进行了总结分析。8号高炉一代炉役寿命9年10个月,单位炉容产铁量10640 t/m³,停炉后进行的炉缸炉底破损调查结果表明,炉缸与炉底交界处侵蚀最为严重,呈象脚状侵蚀,炉缸炭砖部分环裂,炉底5层满铺炭砖完好,炉缸侵蚀的原因主要是铁水环流、铁水溶蚀、有害元素侵蚀和热应力等。8号高炉这一代炉役的长寿经验:一是均衡稳定的生产组织;二是长期稳定顺行的炉况;三是及时采取相应的护炉生产措施,四是合理应用炉体维护技术。     

首钢京唐1号高炉炉芯温度初探

高炉炉芯温度是炉缸活跃程度的重要表征。炉芯传热可作为一维稳态传热来处理,通过建立首钢京唐1号高炉炉芯传热的计算方程,计算绘出了炉芯温度-炉缸温度、炉芯温度-陶瓷垫厚度的关系线,确定了现阶段首钢京唐1#高炉合适的炉芯温度为310～380℃,分析得出炉芯温度低时,炉缸工况差,炉芯温度和铁水温度的相关性弱。     

熔炼次数对M17返回料合金成分、组织和性能的影响

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。     

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.