形变马氏体对奥氏体不锈钢封头性能的影响

奥氏体不锈钢因其优异的性能,被广泛应用于石油化工特种设备领域。本文针对常见的形变马氏体致奥氏体不锈钢封头泄露这一失效现象,阐述形变马氏体的产生机理、影响因素以及其对封头性能的影响,并提出相应的预防措施,旨在为不锈钢封头的制造和安全稳定运行提供参考,以减少失效事故的发生。     

基于总物流分析的我国钢铁工业生态效率分析

近年来我国钢铁产量快速增长且钢铁工业规模庞大,因此有必要对我国钢铁工业的生态效率进行研究. 采用总物流分析方法对我国钢铁系统的总物流进行分析,得到了钢铁系统的总物流分析指标;对1995—2011年我国钢铁工业的生态效率(包括资源效率、能源效率、脱钩指数等)进行了分析. 结果表明:2004年资源效率(粗钢产量与铁矿原矿消耗的比值)和资源经济效率(钢铁工业增加值与铁矿原矿消耗的比值)均达到最大值,二者分别为0.54 t/t和827.66元/t;2011年能源效率(粗钢产量与钢铁工业能耗的比值)和能源经济效率(钢铁工业增加值与钢铁工业能耗的比值)均达到最大值,分别为1.53 t/t和2 976.65元/t. 基于我国钢铁系统的总物流分析结果进行了脱钩指标分析,结果显示,D_DEU(国内开采量的脱钩指数)为0.189,大于DMI(直接物质投入量)、TMR(总物质需求)及DPO(国内排放量)的脱钩指数(分别为0.115、0.084和0.061),即国内开采量的脱钩情况在该阶段达到最佳,这与我国铁矿石产量不足、钢铁生产更多依赖于进口资源密切相关. 最后提出了提高矿产资源综合利用率和重视废钢资源回收利用等相应的对策建议.      

Corrosion behavior of steels for CO2 injection

The process chain for Carbon Capture and Sequestration (CCS) includes tubing for injection of CO₂ into saline aquifers. The compressed CO₂ is likely to contain specific impurities; small concentrations of SO₂ and NO₂ in combination with oxygen and humidity are most harmful. In addition, CO₂ saturated brine is supposed to rise in the well when the injection process is interrupted. The material selection has to ensure that neither CO₂ nor brine or a combination of both will leak out of the inner tubing. In this comprehensive paper the investigated materials range from low-alloy steels and 13% Cr steels up to high-alloy materials. Electrochemical tests as well as long term exposure tests were performed in CO₂, in brine and combination of both; pressure was up to 100 bar, temperature up to 60 °C. Whereas the CO₂ stream itself can be handled using low alloy steels, combinations of CO₂ and brine require more resistant materials to control the strong tendency to pitting corrosion. The corrosion behavior of heat-treated steels depends on factors such as microstructure and carbon content. For different sections of the injection tube, appropriate materials should be used to guarantee safety and consider cost effectiveness.     

轧钢污泥综合利用的技术研究

阐述了一种轧钢污泥的回收处理技术,该技术可把轧钢污泥有效地分离成氧化铁粉和混合油,实现综合利用,减少铁素资源浪费,有良好的经济效益和环境效益.     

经济转型中的中国废钢铁投资市场

废钢铁产业是我国再生资源产业的主体,其节能减排、低碳环保和不可替代的钢铁原料功效十分显著。阐述了我国废钢铁产业在经济转型中的主导地位、应用价值、投资环境及今后的发展战略。指出我国经济发展方式的转变,赋予了废钢铁产业良好的发展机遇和重大的历史使命,中国废钢产业具有良好的投资市场和巨大的发展空间。     

国内电炉钢发展现状与应用前景

通过电炉铜与转炉铜能耗对比,突显了电炉钢的节能与环保优势,同时介绍了国内外电炉钢应用现状。随着社会工业化的发展所带来的钢铁积蓄量的增加,以及电炉钢技术的不断完善和发展,加之迎合国家低碳经济政策的实施,国内电炉钢发展具有广阔前景。     

Pah characteristics in ambient air within a steel industrial complex

Ambient air samples at ten sites in an iron and steel industrial complex were collected from June to December for analyzing polycyclic aromatic hydrocarbons (PAHs). Sixteen species of PAH components in air samples were identified. The results indicate that both gaseous phase and particle‐bound PAHs at the top of the cokemaking plants are unusually high. The profiles of particle‐bound PAHs indicate that the predominant species at the top of, the coke oven batteries are those of high molecular weight components. The major components of particle‐bound PAHs at sampling sites near the fenceline, however, include the medium molecular weight components. The PAH profiles of air samples within the industrial complex show a strong similarity to those of cokemaking plant samples. The concentrations and the specific content of benzo(a)pyrene in the iron and steel industrial complex are higher than those values measured in urban area, petrochemical industry park, and open‐air burning area.     

钢铁企业资源综合利用与绿色发展

把生态理论引入太钢,将企业生产过程中的资源、能源、产品、废弃物等全部视为钢铁生态链中的一个物种,通过循环利用和产业链延伸实现了全流程的清洁、高效和企业的绿色发展。     

我国重工业企业烟气脱硫技术及存在的问题

为使企业在"十二五"期间达到SO2减排指标,总结出几种目前应用普遍,技术成熟,投资、运行成本较低的脱硫工艺,包括烟气脱硫的基本原理、主要设备、技术难点及存在的问题。供企业新建,改建或扩建脱硫系统借鉴。     

绿色环保、高效节能、资源循环利用的清洁炼钢厂

主要介绍宝钢集团浦钢搬迁罗泾工程为建设绿色环保、高效节能、资源循环利用的现代清洁炼钢厂所采用的工艺技术、技术装备和技术措施。对炼钢工程中所采用的各种工艺技术、技术装备和技术措施等进行说明和分析。