加热炉助燃风机节能改造的探讨

介绍了热轧板厂2#加热炉助燃空气系统节能改造的几种方案。重点提出了助燃风机变频改造并对变频调速改造后的经济效益进行了较为详细的计算。     

1780产线主电机冷却风机变频节能技术应用

介绍了梅钢热轧1780产线主电机冷却风机变频节能控制系统的立项起因、系统组成以及实际的节能效果展示,可作为同行主电机冷却风机节能措施参考借鉴,打开思路,实现相关冷却风机的变频节能改造。     

蓄热式加热炉燃烧过程控制系统改造

加热炉燃烧过程控制系统是优化燃烧控制模式,达到节能降耗的目的。介绍了控制方式由PLC逻辑控制升级为数学模型控制的思路和方法,以及产生的效果。改造后节能效果明显,对蓄热式加热炉燃烧控制方式的改造具有应用推广价值。     

煤气加压风机控制系统的变频调速改造

根据煤气加压风机的工艺流程特点,采用变频调速技术,对煤气加压风机电机的控制系统利用变频调速技术进行改造,实现了两台变频器控制4台电机的节能运行方式,发挥了变频技术的节电性能,达到了预斯的节电效果。     

加热炉供风控制策略优化应用实践

空燃比的控制精准度直接影响着加热炉排烟成分、加热效率、工艺能耗、产品质量、减排、环保等诸多指标。文章通过对某厂特钢加热炉改造过程中实施变频风机与自动调节阀联调优化的方式为加热炉供配风的工程实践,实现了加热炉动态供热过程中的空燃比的稳定控制,实现了加热车间节能减排,提质增效的效果。     

多段分散双蓄热式烧嘴加热炉的应用及特点

结合西林钢铁集团公司第一轧钢厂蓄热式烧嘴加热炉大修改造项目,介绍了蓄热式烧嘴加热炉的概况、燃烧和控制系统的结构特点。结果表明,多段分散空煤气双蓄热式烧嘴加热炉运行安全可靠,加热质量、加热能力达到了设计要求,自动化控制系统双交叉燃烧控制原理满足现场要求,给工艺控制和生产组织提供保证。多段分散式控制布置在增产降耗、高效节能等方面具有优势。     

变频调速技术在加热炉风机中的应用

主要介绍了变频器在特钢厂加热炉风机系统中的应用，简述了变频调速技术及改造方案的实施、应用与效果。     

机尾除尘风机的高压变频节能改造

为节约电能,对机尾除尘风机进行高压变频节能改造。通过对电气主回路、变频冷却系统等方面进行改造,节能效果明显,机尾除尘风机运行情况良好,改善了工艺条件,取得了较高的经济和社会效益。     

除尘风机变频器控制系统设计与实现

文章通过对2#风机电机控制系统进行改造,将其控制系统改造为变频控制系统,解决在生产高峰期除尘风机出力不足的问题,并能够根据工艺要求对除尘风机进行无级调速,实现节能降耗的目的。同时对2#风机进行了远程监控改造,确定了以S7-400系列的PLC作为控制单元,以ET200M作为远程控制站,实现2#风机电机变频控制的远程监控和管理。     

冷却塔风机联合变频节能探讨

循环水系统冷却塔风机直启效率低下,无法满足循环水冷却要求的现状。在冷却塔风机变频节能改造的概念上提出风机联合变频的创新思路。以5台冷却塔风机改造为例,探讨联合变频的实际节能效益和价值。     

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.