本钢综合污水处理及回用

吨钢耗新水作为一项重要指标受到各冶金企业重视,本钢新建污水处理厂,取得良好社会效益和经济效益,吨钢耗新水首次降到10以下,并积累了运行经验.     

膜技术在邯钢中水回用系统中的应用与探讨

邯钢运用膜技术深度处理中水,满足了企业不同用户的用水水质要求,提高中水回用率,可使吨钢耗新水指标降低至4m~3以下。     

应用循环经济理念,推进水资源高效利用

对比了我国钢铁企业与国外先进钢铁企业之间的水资源利用差距,分别从科学管理、减量用水,生产废水回收再利用及城市生活污水资源化三个方面介绍了太钢在降低吨钢耗新水、提高水资源利用率方面采取的技术改造和管理举措。     

安赛乐米塔尔不锈钢公司CEO访太钢不锈

今年前2个月,宝钢不锈钢事业部吨钢耗新水指标分别达到3．34立方米、3．76立方米,2月份,废水回用站累计对外供水达1200万吨。这标志着不锈钢事业部吨钢耗新水已步入国内先进行列。     

中水回用技术在马钢的应用

通过对六汾河废水的排量测算、水质分析,选择可行的水处理工艺,以实现马钢生产废水的综合治理和充分利用,降低马钢吨钢耗新水指标,为马钢生产废水实现全部零排放摸索出一条成功之路。     

提高污水回用率，减少新水耗用量

介绍了首钢在节约用水工作中采取的具体措施：污水处理厂的投用,使污水回用率达到70％;高炉煤气洗涤水外排水的利用、污水处理广回用水除盐站的建立,使污水回用率达到95％,新水补充量降低,吨钢耗新水也相应降低。改造措施取得了一定的经济效益、社会效益、环保效益。     

蒸气鼓风机站水系统改造

武钢蒸气鼓风机站直流供水系统改造成循环水系统,节约水资源,降低吨钢新水耗量,满足冶金行业"十一五"规划中吨钢新水耗量的要求,实现武钢耗新水指标历史性的跨越.     

废水预处理技术在八钢的应用

采用旋流沉砂—调节混匀—混凝沉淀降钙—生物降解—过滤的组合工艺对宝钢八钢公司厂区的生产和生活污水进行预处理,实际运行中能达到良好的处理效果,出水水质稳定,为后续深度处理奠定稳定的基础并达到钢厂废水回用水水质指标,极大降低了工业新水消耗。     

济钢生产综合污水处理及回用工程竣工投用

济钢1座日处理工业污水4．5万m^3的大型综合污水处理站近日建成投用,这是济钢发展循环经济的又一典范项目,对济钢实现工业废水“零排放”,进一步降低新水消耗具有重要意义。济钢曾是济南市用水大户,10年前吨钢耗新水超过20m^3。近年来,济钢采用了40多项不用水的新工艺和节水新技术,2007年吨钢耗新水下降到3．36m^3,处于行业先进水平,为济南市节水保泉做出了贡献。     

本钢集团降低吨钢耗新水成效显著

<正>一季度,本钢集团吨钢耗新水实现4.02t,完成集团下达的4.5t考核计划。这是本钢集团多年来逐步改造环水系统,减少工业新水直排,大力开展节水工作,加强用水管理所产生的良好效果。吨钢耗新水指标是钢铁企业综合实力、管理能力的体现。近年来,本钢集团通过大规模技术改造,坚持节约用水的原则,对新上的设备要求单体设备环水率必须达到97%以上。同时,本钢集团加强了给、排     

Water consumption and wastewater discharge in China’s steel industry

China’s steel industry is one of the major water consuming and wastewater discharge-producing industries. Based on a water flow model, this study provides reasonable and clear definitions of water usage indexes for steel production. Using a survey of key producers, the status and problems of water consumption and wastewater discharge in Chinese steel industry are analyzed. The developments of water conservation and emission reduction are divided into three different stages, and present a slide decreasing curve. At the process level, coking is the heaviest pollution unit, while ironmaking and steelmaking are key parts of water consumption. Although the water resource efficiency has been significantly improved, the water usage level of key producers in China has exceeded the average world steel level; however, it is still lower than other advanced countries. Therefore, some measures and recommendations need to be implemented for Chinese steel industry to save water and reduce emissions.     

钢铁流程资源-能源-碳排放耦合关系及分析

 钢铁工业作为国民经济建设的基础性行业,在繁荣发展的同时带来了资源和能源消耗量大、CO₂排放高等问题,引起国内外重点关注。基于中国北方某钢铁企业,以3种典型的耦合关系为例对钢铁生产过程的水资源-能源-碳排放耦合关系以及相关的影响因素进行了分析。节能供给曲线分析和生命周期水足迹分析结果表明,案例企业的能源消耗-水资源消耗-碳排放存在协同效应。例如在节能技术视角下,19项具有成本效益的节能技术在减少能耗6.01 GJ/t的同时,还可协同减少工业新水消耗1.35 m3/t、水足迹4.81 m3/t以及CO₂排放640.36 kg/t。进一步分析了耦合关系的主要影响因素,即电力消费结构、废钢投入率和节能技术参数变化的影响。该研究为中国钢铁工业可持续发展提供理论依据和重要参考。     

新世纪初的冶金节能

改革开放以来,我国吨钢能耗下降率近50%,取得了巨大的经济效益和社会效益;但单位产品能耗仍然较高,依然是制约钢铁工业健康发展的重要因素。因此,在21世纪,要采取强化能源使用管理、调整产业结构、改造工艺设备等措施降低吨钢能耗,尽快达到750～800kgcet的目标,赶上世界先进水平,增强钢铁企业市场竞争能力,早日把我国从产钢大国建成钢铁强国。     

热处理炉窑无水冷横梁改造及其推广应用

热处理炉窑原设计炉门横梁采用45#厚壁管U型结构,通水进行冷却。但在生产使用中发现水冷梁易发生漏水坍塌事故,造成被迫停炉,既影响生产又使消耗升高。将传统的水冷结构改为无水冷梁结构,既能提高热处理炉窑生产效率和运行周期,又能降低消耗节约成本。     

钢铁综合企业的水流模型及吨钢综合水耗分析

 钢铁在工业领域里是耗水和排污大户,钢铁企业的节水减排势在必行。运用物质流分析跟踪观察模型构建钢铁企业的水流模型,依此分析吨钢综合水耗的构成;借鉴系统节能理论,建立钢铁企业吨钢综合水耗的[w-p]模型,在此基础上提出钢铁工业综合水耗的[w-p]分析方法。以中国某大型钢铁综合企业为例,分析工序水耗变化和钢比系数变化对综合水耗的影响,结果表明,降低各工序的工序水耗是降低吨钢水耗的主要影响因素,并指出随着钢铁企业结构的调整和技术水平的进步,降低工序水耗是钢铁企业节水减排的主要研究趋势。通过模型分析及案例研究得到降低吨钢综合水耗的方向及措施。     

Energy Consumption and Its Influencing Factors of Iron and Steel Enterprise

Based on the theory of system energy-saving, a multilevel input-output computational model of the iron and steel enterprise was established. And one example was calculated using this model to analyze the product energy value, the process of energy consumption and energy consumption per ton of steel of an iron and steel enterprise. The influences of factory layout, steel ratio and production structure arc calculated and analyzed. The calculation example indicates that reasonable factory layout is helpful to reduce its transportation energy consumption, decrease loss of heat, improve product rate and reduce environmental contamination; ore to steel ratio and iron to steel ratio decrease at the same degree; the influence of ore to steel ratio on energy intensity per ton is less than that of iron to steel ratio. The lord process product structure has a certain effect on comprehensive energy consumption per ton of steel.     

冷连轧机组吨钢电耗综合控制技术

 随着钢铁市场竞争的日益激烈与行业整体利润率的下滑,如何在不影响产品质量的前提下节能减耗已经成为现场技术攻关的焦点。为满足冷轧生产的需求,提高产品的竞争力,充分考虑到冷连轧机组的设备与工艺特点,在建立了一套吨钢电耗计算模型并分析了吨钢电耗影响因素的基础上,从轧制规程、乳化液流量、轧制速度的综合优化设定入手,以降低吨钢电耗为目标,同时考虑到机组最大轧制压力、最大轧制功率、打滑与热滑伤的防治、乳化液最大流量、乳化液综合成本、产能效益等因素的约束,提出了一套冷连轧过程吨钢效益综合控制技术,并将其推广应用到生产实践,在吨钢乳化液消耗没有增加、产能没有下降的前提下,吨钢电耗平均下降了7.53%,为机组创造了较大的经济效益,具有进一步推广应用价值。     

八钢430m～2烧结降低工序能耗的措施

八钢430m2烧结机从设计伊始就综合考虑各种节能措施,从各个工序中的固体燃耗、电耗、水耗、煤气消耗、提高混合料温度等方面阐述降低烧结工序能耗的主要途径、方法。并总结了八钢烧结在节能降耗方面所采取的主要措施及取得的效果。     

棒材高效低碳生产技术与集成化应用

 为了减少钢铁生产流程的能耗,降低废气排放,实现低碳生产,河钢集团用冶金流程工程学理论指导开发了高效炼钢、高效连铸技术并与棒材轧钢工序集成化应用,实现了棒材生产流程的低碳化和绿色化。讨论了提高转炉冶炼效率、提高连铸机拉速、钢坯定重、提高钢坯热送温度,实现转炉、连铸、轧钢高效生产与快速连接的关键技术。实践表明,通过优化钢铁制造流程,开发高效炼钢、高效连铸技术、“界面”优化技术并实现集成应用,构建高效率的冶金流程生产平台,能够显著降低生产流程的能耗、降低碳排放,同时提高产品质量、降低生产成本,实现高效、低碳、稳定生产。     

SAIL—striding towards the future with the touch of green

Steel plays a vital role in every facet of our life.Like DNA in our body,steel plays a crucial role in the development of any society.From infrastructure,defence,transportation,research & development and even in day to day life,everywhere steel is used.Per capita consumption of steel is treated as an important index for the socioeconomic development of any country.The rapid and continuing growth of steel industry during last few decades bears testimony to the indispensability of steel as a vital resource for economic development.Though steel as a product is eco friendly,the process of making steel is associated with lot of energy and environmental ramifications.According to International Energy Outlook 2009,iron and steel industry account for about 20%of the total industrial energy consumption.Hence this industrial sector can play a pivotal role to influence the energy and environmental scenario of any country. As a responsible corporate citizen,Steel Authority of India Limited,the largest steel producer in India,has taken various initiatives over the years towards the protection of environment and reduction in energy consumption.This has resulted in the reduction of energy consumption by almost 15.45%over a period of last 10 years.The initiative is also evident in the company’s growth plan which aims at almost doubling the production capacity in the near future from the existing level of 13.5 Mt/a.Implementation of tate of it lean echnologies like CDQ,TRT,and waste heat recovery from sinter plants,maximizing CDI & CTI in blast furnaces,augmentation of pollution control devices with more efficient equipment are on the anvil.These reaffirm our commitments for clean and sustainable environment. This paper gives an overview of the efforts taken by SAIL over the years for energy conservation and environmental protection with special emphasis on a few projects like by product fuel for power generation,use of energy efficient burners,maximizing the use of thyristors in place of motor generators,coke dry quenching facility, etc.