迁钢2号高炉霍戈文热风炉最佳煤气流量的数值模拟

针对热风炉由于高风温操作生成的氮氧化合物易导致热风炉炉壳晶界的严重腐蚀,从而影响热风炉使用寿命的问题,本文采用CFX11.0软件对不同煤气流量条件下霍戈文热风炉燃烧室的燃烧状态进行了数值模拟研究。研究结果表明:在高炉煤气热值为3000kJ/m3左右,预热温度为170℃,助燃空气预热温度为600℃的条件下,控制煤气流量在66000～74000 m3/h之间时,可同时获得较高的燃烧温度和较好的燃烧效率,能有效地控制拱顶温度,从而使热风炉长寿。此项研究为迁钢2号高炉霍戈文热风炉1280℃高风温工业实践的顺利实施提供了理论依据。     

首钢2号高炉利用旧热风炉预热助燃空气的实践

首钢在2号高炉停炉改造时，将废旧热风炉改造成空气预热炉，独立加热助燃空气，可使助燃空气加热到600℃，同时利用热风炉烟气将煤气预热到200℃，实现了在全烧高炉煤气的情况下稳定供应风温l250℃。     

自动烧炉系统在兴澄特钢2#高炉热风炉的应用

2#高炉热风炉烧炉分为手动、半自动两种模式。燃烧控制分为两种：1、手动设定空气阀、煤气阀的阀位,通过查看程序计算燃烧运行中的实时空燃比,结合燃烧室温度进行控制。2、手动设定空气流量、煤气流量来烧炉,视燃烧效果小幅调节流量。为推进智能化炼铁,兴澄特钢引进成熟、先进的自动烧炉系统,减少人为干预,实现了热风炉自动烧炉。从而降低空气和煤气消耗,达到节能、降耗的目的。     

新钢10号高炉双预热器的生产效果

本文介绍了分离式热管煤气、空气双预热系统在新钢10号高炉热风炉的实际应用情况.通过热风炉燃烧产生的高温烟气对煤气(高炉煤气+转炉煤气)及助然空气进行预热至160～ 190℃,提高理论燃烧温度、拱顶温度及烟道温度,实现了高炉1 225℃以上风温.从而降低高炉焦比,节能降耗,提高高炉冶炼的经济效益.本文从技术、节能、经济效益三方面分析了煤气、空气双预热器的优越性.     

环体多孔短焰燃烧器的特点

一种新型的环体多孔短焰燃烧器，可解决提高炉温和安全生产的问题。其技术方案是：在热风炉的蓄热室上部外壁装有环体。环体内有空气预热环道和煤气预热环道，环体下部有与空气预热环道相通的空气入口管，上部有与煤气预热环道相通的煤气入口管。空气预热环道上部有多个空气出口；煤气预热环道内侧开有多个煤气出口，煤气出口与空气出口相连通，构成端部混合气体出口，并与蓄热室上部的燃烧室相连通。这项实用新型专利结构简单，投资少，蓄热室空间大，气体燃烧充分，使用安全，空气加热温度高，蓄热体加热快，是对现有燃烧装置创造性的改进，其推广应用有巨大的经济和社会效益。     

用明火加热生产取向硅钢的方法

专利号：00114320．4 专利权人：武汉钢铁（集团）公司 用于加热生产无取向硅钢板的装置，还可采用明火加热生产取向硅钢板，其方法：点燃预热段内由空气和煤气混合后的气体，待预热段内温度达到设定温度后，取向硅钢板进入预热段预热；     

顶燃式空气、煤气自身双预热热风炉的开发与应用

顶燃式空气、煤气自身双预热热风炉采用了顶燃式燃烧器热风炉专利的燃烧器技术和高温旁通烟道技术.使用该热风炉后所取得的效果是:总烟道内综合排烟温度可达600 ℃;可将空气、煤气预热到300 ℃;以单一高炉煤气为燃料时,热风温度可达1200 ℃以上;烟气经过空气、煤气换热器后温度低于180 ℃.     

热风炉节能燃烧的分析

以高炉煤气在热风炉燃烧室燃烧的热工特性为基础，用数值计算方法研究烧炉方式，煤气含水量及空气，煤气双预热对煤气使用量的影响，为节省加热热风炉的煤气量，提高高炉风温和充分利用煤气的热值提供理论依据。     

鞍钢炼铁生产实现煤气置换的途径

在介绍了鞍钢炼铁生产热风炉使用煤气的现状以后,针对高热值焦炉煤气短缺、低热值高炉煤气过剩的实际情况,提出了要通过开发新技术,因地制宜,多种形式并举以实现多用或单一使用高炉煤气烧出高风温的置换焦炉煤气的可行方法和途径,文中还具体描述了高炉热风炉自身预热,荒煤气预热净煤气换热器,带有附加加热系统的回收热风炉烟气用换热器,以及对高炉煤气进行干式除尘等煤气置换措施。     

热风炉用助燃空气和煤气的预热技术

介绍了国内外利用热风炉烟道废气（或其它余热）预热热风炉用助燃空气和煤气技术，以及使用单一低热值高炉煤气来获得高风温的一些措施，如：自身预热法、小热风炉预热法以及金属换热器预热法等。并针对攀钢实际提出了建议。     

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.