高效节能烘烤器在炼钢工序的应用

第三代蓄热式钢包烘烤器采用双蓄热及分级燃烧技术,具有高效节能和环保的特点。韶钢炼钢工序通过技术改造,淘汰原来的单蓄热式烘烤器,采用双蓄热及分级燃烧的第三代烘烤器,收到了好的节能效果。文章主要介绍了双蓄热烘烤器的原理、项目的改造内容及改造效果。     

蓄热式烘烤器在南钢炼钢厂的应用

针对传统钢包烘烤器存在烘烤效率低、产生高温废气(800℃)、浪费能源等现象，采用蓄热式烘烤器技术，对现有钢包烘烤器进行改造，从而达到提高燃烧温度、节约能源的作用。     

温度和流量烘烤曲线在承钢120t转炉烘烤系统的应用

本文阐述结合承钢线材事业部实际,成功将高温低氧燃烧技术应用于承钢钢包烘烤器的具体实践,重点阐述蓄热式钢包烘烤器的自动控制装置,在原有手动和流量/时间烘烤模式的基础上,系统首次在钢包烘烤控制装置中,采用了温度反馈控制,本文对该控制方式进行了较为详细的描述。     

蓄热式中间包烘烤器的节能优势及烘烤效果

通过计算蓄热式燃烧技术的节能率,得出了蓄热式中间包烘烤器比普通烘烤器具有节能优势。同时,对两种烘烤器的烘烤效果进行了对比,蓄热式中间包烘烤器的烘烤效果更加明显。     

中间包蓄热式烘烤在宝钢的研究与应用

改造前宝钢中间包烘烤使用传统直燃式烘烤器,烘烤器对空燃气都不预热,能耗大、包盖冒火严重、烧嘴寿命低。双蓄热式中间包烘烤器采用高温空气燃烧技术,结合新一代的自动控制系统、换向阀、高速烧嘴和智能运维等技术,通过蓄热体对烟气热量回收利用,并对空燃气进行充分预热,使烘烤煤气消耗量减少25%以上。目前中间包蓄热式烘烤技术应用于现场,较之传统直燃式烘烤器,获得了更好的节能效果,并且提高了烘烤温度。     

钢包烘烤器蓄热式改造的数值分析

利用数值模拟技术,针对本溪钢铁集团有限公司炼钢厂钢包车间烘烤器的蓄热式燃烧改造项目进行了数学模型试验研究。研究结果表明,钢包烘烤器的蓄热式燃烧改造与传统套管式烘烤设备相比更加高效节能环保,是一种可行的技术方案。     

蓄热式钢包烘烤器原理及应用

介绍了蓄热式燃烧技术的工作原理及其在钢包烘烤器上的应用。     

蓄热式卧式钢包烘烤器在韶钢的运用

通过对韶钢蓄热式卧式钢包烘烤器运行工况的现场测试和分析计算,研究了钢包烘烤器的燃烧效率、热效率、污染物排放和蓄热室阻力特性,对其加热能力和工作性能也进行了综合分析。结果表明,该类型蓄热式卧式钢包烘烤器的燃烧效率达到98%以上,热效率为36.86%,钢包内加热温度分布均匀,可以较好地满足钢包烘烤要求;在最大供气能力情况下,送风阻力和排烟阻力分别为2241Pa(~224mm H2O)、485Pa(~49mm H2O),工作性能良好;出口烟气NOx的浓度降低到4×10-6,远低于排放标准,符合环保要求。     

高效节能烘烤技术在宝钢钢包及中间包的应用

高效节能的蓄热式烘烤是一种典型的高温空气燃烧技术(HTAC,High Temperature Air Combustion).虽经多年发展,但设备在现场的稳定应用一直不甚理想.介绍了此项技术的原理和组成以及在宝钢炼钢厂钢包和中间包烘烤上的应用.根据现场实际使用情况,钢包可以被烘烤到1 100℃以上,包衬上下温差小于65 K,平均节能率为32.46％;中间包可以被烘烤到1 200℃以上,水口烘烤温度达到650℃以上,平均节能率为33.01％.特别是钢包烘烤器的12个季度的节能率一直连续保持在30％左右,说明该高效节能烘烤技术是稳定、可靠的.高效节能蓄热式烘烤能明显提高烘烤温度,节约煤气,进而降低转炉出钢温度,保证连铸的稳定生产.     

数字化蓄热式钢包烘烤器及自动控制系统

蓄热式燃烧技术和脉冲燃烧技术是新型的节能环保燃烧技术。数字化蓄热式钢包烘烤器控制系统利用数字化脉冲控制把这两项技术结合在一起。这大大降低了能耗，减少环境污染。本文针对数字化蓄热式钢包烘烤器，提出升温阶段采用自寻优算法，不断调整换向时间，并能记忆最优参数，保证经过几次烘烤后系统整体最优；保温阶段即采用脉冲控制的方法。     

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.