MgO含量和碱度对高炉渣粘度的影响

根据唐钢第二炼铁厂高炉的原料条件和冶炼情况,研究了MgO、二元碱度(CaO／SiO2)对高炉渣的流动性粘度熔化性温度的影响,为唐钢高炉优化造渣制度提供实验和理论依据,结果表明：炉渣碱度在1．10-1．20之间,MgO在10％-12％,Al2O3≯14％时高炉能达到较好的冶炼效果,从理论上分析了炉渣中R2及MgO的适宜含量范围。     

高氧化铝高炉渣成分优化的研究

针对高氧化铝高炉渣的成分优化问题进行了理论计算和实验室研究。运用FactSage热力学软件绘制了氧化铝含量为20%的SiO2-CaO-MgO-Al2O3四元系相图,分析了炉渣熔点随二元碱度和氧化镁含量的变化规律。运用数学模型计算了四元渣系在1450℃下的黏度值。根据通过理论计算所确定的成分范围,选取了黏度试验样品的化学成分。研究结果表明,对于(Al2O3)=20%的高炉渣,二元碱度宜控制在1.20~1.30范围,MgO含量不宜超过12%。当今世界铁矿石市场上价格及性能波动频繁,本文采用的研究方法有助于根据市场情况的变化及时调整炉渣成分,保证高炉稳定顺行。     

适应高Al2O3炉渣冶炼的高炉炉渣结构调整

高炉炉渣中Al2O3含量高(15%)时造成炉渣流动特性变差,为此不适当的对策给生产操作带来危害。通过对炉渣四大组元的系统试验研究,提出定量调整其他各炉渣组元的比例,合理匹配各组元,关键是关注1 500℃下炉渣黏度变化和熔化性温度的控制,这样向高Al2O3生产转换不会有大的障碍。还通过国内外高炉的炉渣特点对比,提出合理炉渣结构的调节途径,是高Al2O3炉渣生产的切实可行的技术路线。     

高炉高Al2O3炉渣冶炼综合分析

高A12O3 矿的配加及精料技术的进步等因素促使高炉渣中A12O3 含量过高,从而使炉渣熔点和熔化性温度升高,流动性和脱硫能力下降.高炉冶炼可以通过改善焦炭质量,降低燃料比,提高煤比,提高烟煤配比,优化配矿结构和高炉炉料结构,适当提高渣比以及提高高炉适应高Al2O3 操作的能力等措施来降低Al2O3 对高炉冶炼的影响.     

攀钢高炉冶炼钒钛磁铁矿降低铁损的生产实践

攀钢高炉冶炼钒钛磁铁矿由于炉渣存在TiO2还原问题,炉渣粘稠,渣铁难分,入炉品位低,冶炼渣量大,炉前维护与出渣、出铁技术落后,高炉铁损高达5％～10％,远高于普通矿冶炼高炉铁损。通过采取优化控制炉渣成分与冶炼炉温,对炉前出渣、出铁进行系列改进,低品位冶炼强化技术,快速开停炉技术,新3＃高炉操作优化等措施,2012年铁损由5．76％降至5．41％,2013年铁损降至4．3％,取得了明显的技术效果与经济效益。     

武钢高炉渣中Al2O3含量异常升高原因分析及对策

针对2004年下半年来武钢高炉炉渣中Al2O3含量异常升高给高炉带来的严重影响，通过组织跟踪取样检验和统计分析，找出了导致武钢高炉炉渣中Al2O3含量异常升高的原因。经过采取切实有效的技术和管理措施，将高炉炉渣中Al2O3含量控制在合理范围内，并优化了高炉技术经济指标。     

MgO含量和碱度对高炉渣的黏度的影响

根据唐山钢铁有限责任公司第二炼铁厂高炉的原料条件和冶炼情况,研究了MgO、二元碱度(CaO/SiO2)对高炉渣的流动性黏度以及熔化性温度的影响,为唐钢高炉优化造渣制度提供实验和理论依据,结果表明:炉渣碱度在1.10～1.20之间,MgO在10%～12%,Al2O3≯14%时高炉能达到较好的冶炼效果,从理论上分析了炉渣中R2及MgO的适宜含量范围.     

古代冶炼遗弃炉渣的综合利用

湖北银山冶炼厂基地残留古炉渣约24万t,含氧化锰12％。按20％古炉渣和80％铁锰矿石混匀入5m~3高炉冶炼,可生产出合格富锰渣。每年增收8万元。建议另配加部分高品位锰矿石,以便进一步发挥古炉渣的作用,提高高炉冶炼效益。     

宝钢不锈钢事业部2500m高炉的高Al203炉渣生产实践

在近年来铁矿石价格持续上扬、铁矿石资源不断劣化的大背景下,宝钢不锈钢事业部炼铁厂高炉入炉A12 03负荷在2009年1～4月达到47.4 kg/t,为了将炉渣A1203含量控制在15％,高炉渣比被迫增大到310 kg/t以上.预计多使用劣质铁矿石资源必将成为高炉冶炼的趋势,故突破炉渣A1:03含量15％水平的上限势在必行.为此,开展了适当放宽高炉炉渣A1203含量的研究及其生产实践.分别选取2009年1～4月(炉渣A1:O3月平均含量为14.86％)、2010年1～4月(炉渣Al203月平均含量为16.81％)两段时期,对比分析高炉的生产技术指标.结果表明,通过高炉操作制度的合理调控,高炉有能力接受16％水平的炉渣A12O3含量.     

济钢高炉高Al2O3炉渣渣系优化试验研究

以济钢现场高炉渣样为基准,采用正交设计方法,设计了25组试验方案,研究了w（Al2O3）为15%～23%的高炉炉渣性能,结果表明,济钢高炉炉渣中Al2O3不宜超过20%,MgO不宜超过12.5%。     

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.