调整溜槽倾角变动方式布料模拟研究

通过对某高炉应用无料钟多环布料数学模型计算模拟其炉料初始分布研究发现:只有在大角度、大角度差、大环位环数差布料条件下才有可能得到凸台型料面。减少布矿溜槽倾角,增加布焦溜槽倾角和增加布矿溜槽倾角,减少布焦溜槽倾角这两种布料方式能使凸台型料面更平坦。加重边缘所选择的布料方式以前者为好,放松边缘所选择的布料方式以后者为好。矿石批重改变则布料方法也要随之改变,以保持凸台型料面形状。     

高炉无料钟布料凸台料面模拟研究

以某高炉为研究对象,根据其主要参数条件、装料制度,应用无料钟多环布料数学模型模拟研究了炉料在炉内的初始分布,寻求中心较开放的凸台料面。研究发现:边缘增加布料圈数和溜槽大角差布料以及边缘矿增加布料圈数、增加焦炭布料溜槽角度和溜槽大角差布料方法可获得较平坦的凸台料面。采用减少布料溜槽角度布料方法时,调整布料参数一般难以获得中心较开放的凸台料面;采用增加焦炭布料溜槽角度布料方法时,缩小布矿焦溜槽角度,增大矿焦布料溜槽角度差易获得中心较开放的凸台料面。在生产中应用本模型将有助于炼铁高炉工作者定性和定量运用上部调剂控制炉料在高炉炉内的初始分布,达到保护炉墙、保证高炉顺行、改善煤气利用、节能降耗的目的。     

天钢2号高炉溜槽布料角度的确定

对天钢2号高炉溜槽布料角度的确定进行了总结.2号高炉开炉装料时进行布料测定,确定了布料溜槽环位角度、节流阀开度、炉料碰撞点、料面形状等;高炉投产后,根据炉喉十字测温、冷却壁壁体温度、水温差、原燃料条件等参数,对溜槽布料角度进行了调整,使高炉布料制度趋于合理.     

无料钟布料料面形状数学模型研究

以某2 500m3高炉无料钟布料模型(1:10)试验为依据,分析了节流阀开度、溜槽角度和炉料粒度分布情况对料面的影响,提出了料面形状基本符合正态分布规律.结合无料钟布料规律建立数学模型,并应用VC编写仿真程序,模拟结果和实际基本相符.     

不同溜槽形状下的料流偏析现象

 无钟炉顶设备主要通过改变溜槽倾角以调整布料矩阵,最终改变炉料在高炉内的分布。此外,炉料分布还受溜槽形状的影响,不同形状的溜槽,其料面偏析情况不同。为探究不同溜槽下的布料偏析现象,针对常见圆方比例不同的3种类型溜槽、带储料槽型溜槽以及破损溜槽,运用离散单元法对溜槽表面和布料特征进行研究,探究在不同溜槽下炉料的偏析现象和溜槽受力情况。模拟结果表明,相对于圆形出口溜槽,方形出口溜槽料流宽度小,分布均匀,更有利于精准布料;带储料槽溜槽可以减小炉料对溜槽的冲刷,延长溜槽寿命;破损溜槽料流宽度较大,炉料分布不均匀,会加大炉料在料面上的偏析。     

水平料槽测定法测定高炉料流堆尖位置

水平料槽测定法是一种测定高炉料流堆尖位置的新方法。该方法是在炉喉水平径向安装接料槽，通过料槽能够较为方便、准确地测定不同料种、不同溜槽倾角和不同料线情况下炉料堆尖位置，为选定合适的布料角度提供依据。     

串罐无钟炉顶炉料分布控制技术研究与实践

针对现场测定总结出无料钟溜槽布料料流特点,通过数学模拟得出操作与设备结构参数对料流轨迹的影响,并对马钢新1号高炉炉料分布控制技术进行了分析。研究和实践表明：大型高炉多环布料的核心是形成具有一定宽度的平台,这种平台对控制煤气流分布非常有效;小粒烧结矿加入量与加入位置与原燃料条件有关;当炉况不好时,用双环或三环料制比多环料制效果好;有必要把溜槽布料档位分为外侧、中间与中心,在外侧动作溜槽倾角来调节煤气流效果比在中心好得多。     

鞍钢2580m^3高炉布料料面数值模拟与分析

根据鞍钢高炉布料溜槽的特点,开发了高炉炉料落点数学模型,提出了料面形状数学模型求解方法,并应用该模型定量分析了鞍钢5^#高炉(2580 m^3)料面形状和径向矿焦比情况,得出高炉炉喉中心部位焦层厚度大,中心加焦面积广,中心区域矿焦比高,易造成高炉燃耗高、稳定性差,甚至引起高炉崩料或悬料。     

高炉高球比条件下炉料颗粒偏析行为及其优化

提高入炉球团矿比例是高炉低碳冶炼的重要手段，由于球团矿滚动性强，在高炉布料过程中会存在炉料粒度偏析的问题，因此优化布料制度、降低炉料粒度偏析，对改善高炉上部气流分布具有重要意义。为此，通过建立物理模型，研究球团矿配比、矿石批重和溜槽倾角对高炉布料偏析的影响，结果表明，提高球团矿配比能够降低炉料的粒径差，改善炉料粒度偏析情况。基于试验结果建立了炉料粒度偏析指数预测的多元回归模型，发现炉料粒度偏析指数随着溜槽倾角的增加逐渐增大，在溜槽倾角大于32°后炉料粒度偏析指数的增幅变小；炉料粒度偏析指数随着矿石批重的增加呈现先增大后减小的变化趋势。在球团矿配比固定时，采用大批重小角度溜槽倾角或者小批重大角度溜槽倾角可以有效减小炉料粒度偏析。研究结果可以为高炉采用高比例球团矿冶炼时优化调整装料制度提供参考。     

无料钟炉顶布料溜槽的综合分析

无料钟炉顶布料溜槽是无料钟炉顶系统的一个关键部件也是易损件,因为其非常重要,通常作为一个独立设备来对待。布料溜槽的寿命关系到整个无料钟炉顶设备的可靠性。从实际应用的角度出发,分析综合当前各布料溜槽的特点,为如何设计和制造长寿命的布料溜槽给出了方案,并指出了未来布料溜槽的发展方向和问题。     

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.     

Seven Rare Earth Projects Involving Close to 3 Billion Yuan Investment Landed In the HighTech Zone

正On May 22,Baotou Rare Earth Industry Cooperation Consultation MeetingProject Agreement-signing Ceremony was held in Ningbo,nearly 40 enterprises from Ningbo,Guangdong,Hunan,and Shanxi participated in project consultation.After multi-lateral communication,agreements were signed for a total of 7 rare earth projects successfully.