衡钢ф180mm水平连铸圆管坯扩规改造实践

介绍了衡钢2号水平连铸机进行φ180mm圆管坯扩规改造的实践经验,通过重新设计结晶器、改造拉坯系统、优化生产工艺、采用电磁搅拌及二冷喷水冷却技术,成功地生产出合格的φ180mm圆管坯,铸坯合格率达到99．62％。     

大圆坯连铸机圆坯扩规设备改造实践

总结了某钢铁公司大圆坯连铸机φ700 mm圆坯扩规改造的实践,分析了利用现有大圆坯连铸机进行设备改造升级生产φ700 mm断面圆坯的可能性及技术难度,对其中的关键设备进行了优化设计,使得该台连铸机具备生产φ700 mm断面圆坯的条件。     

莱钢φ350mm圆坯连铸机改造及生产实践

介绍了莱钢通过对其特钢事业部2#合金钢方圆坯连铸机结晶器、二冷系统及矫直系统进行相应的设计改造,成功生产出了质量较理想的φ350mm50Mn圆坯的生产实践.     

管坯水平连铸机的设计与研究

本文论述了由钢铁研究总院与成都无缝钢管厂合作研制成功的单流水平连铸机的设计特点。该连铸机采用无二冷喷水冷却的多级组合式结晶器,双机架电液伺服同步驱动拉坯系统,以及全反推准正弦拉坯曲线,取得了满意的连铸冶金效果。该连铸机已投入工业生产,浇铸φ90mm碳钢及不锈钢管坯,拉速高,管坯质量好。     

φ600mm大圆坯连铸机的设计与生产实践

介绍了江苏苏南装备集团φ600 mm大圆坯连铸机的工艺流程、装备特点、生产实践和铸坯质量结果.     

开发管坯水平连铸技术

水平连铸机具有设备高度低、结构简单、基建投资省、安装维修较方便、铸坯质量好以及铸坯不需矫直便于生产变形抗力较大的钢种等优点,是连铸技术的一个新领域。本文介绍了成都无缝钢管厂与北京钢铁研究总院联合开发的φ60—130mm水平连铸机的技术参数、工艺要点、铸坯质量等情况。     

莱钢炼钢厂成功生产出圆形钢坯

2009年3月19日，在莱钢炼钢厂6号连铸机生产现场，φ200mm、钢种为20号钢的圆形钢坯缓缓从连铸机拉出，在生产方坯、矩形坯、板坯以及大H型钢异型坯的基础上，菜钢炼钢厂首次生产圆形钢坯获得成功。本次共生产出合格圆形钢坯800t。     

中断面水平连铸机的建成

中断面水平连铸机于1990年6月在成都无缝钢管厂建成。设计能力为2万t/a,并于当年9月开始热试。截止到1993年4月,已提供合格水平连铸坯4.69万t;连铸的钢种有20、45优碳钢,27SiMn合金钢,1Cr18Ni9Ti不锈钢等;铸坯规格为φ20mm、φ140mm、φ200mm。目前月产量已超过4000t,预计年产量可达4.5～5.0万t。     

三明钢铁厂小方坯连铸生产超过设计能力

福建省三明钢铁厂小方坯连铸机,于1983年4月建成投产。连铸机为弧型5.25m,三机三流型,由西德德马克公司提供70%的主体设备,余由三钢自己组织国内配套。设计铸坯断面为150×150mm、120×120mm 和70×70mm,目前主要生产150×150mm 和120×120mm 的铸坯,设计年产铸坯能力15万 t。投产两年来,由于厂领导对建设、生产技术准备和组织正常生产均十分重视,操作严格认真,生产稳定,铸坯产量持续上升,1983年、1984年连铸坯产量达到4.5     

连铸150mm方坯的形变和低倍组织缺陷探讨

本文针对三明钢铁厂Demag型小方坯连铸机生产150方坯的变形及相应低倍组织缺陷的研究,找出相对应的关系,以达到合理控制铸坯的外形尺寸,稳定产品质量,为适应大批量的普碳钢生产,我们选用了By 3 150mm方坯一次成材φ45mm圆钢的跟踪试验、其轧制压缩比为14、     

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.