无碳化物贝氏体钢 (CFB):第二部分
双辊铸轧镁合金的机械性能
选择性激光烧结 (SLS):第二部分
DataPLUS 模块提供上万种金属材料和非金属材料的腐蚀数据、焊接性能、尺寸与公差信息以及涂层信息。 点击这里了解更多。
Total Materia New Application Launch! 2021年1月14日
Total Materia New Application Launch! 2021年2月10日
Total Materia New Application Launch! 2021年3月10日
在使用Total Materia几个月之后,以及深刻体验过所有潜在功能之后,我非常感谢你们的卓越工作和持续稳定的升级服务。 Total Materia始终是用来达成这一目的唯一工具。
M. Manfredini Bonfiglioli Industrial Gearmotors 博洛尼亚, 意大利
我们的目标很简单,就是让 Total Materia成为全球工程师在材料领域的首选一站式解决方案
Prof. Dr. Viktor Pocajt, CEOKey to Metals AG
Blast furnace related technologies for the production of iron are still by far the most common however pressures on environmental resources are driving the introduction of new technologies which do not require blast furnaces to produce.
Demands on primary resource, energy consumption, production costs and environmental impact in the iron and steel industry link closely to the ironmaking process, process equipment and technology itself. At present, the blast furnace ironmaking is still the dominant process in ironmaking.
Despite the apparent environmental advantages of the new ironmaking technologies, the blast furnace is still predicted to be the single largest process for ironmaking from iron ore until 2050. However, the proportion of blast furnace (BF) – basic oxygen furnace (BOF) steelmaking could drop to 40 % in 2050 from the current level of 60 % as the blast furnace ironmaking proportion falls from around 95 % to 60 % of the total iron ore processed.
Non blast furnace ironmaking technology process is currently a supplementary system, and there is certain room for development in the future. To reduce the coke rate and to reduce carbon dioxide emissions as the main goal, it needs to reform the existing blast furnace ironmaking process, explore a new technology to radically reduce emissions of CO2 and form a green metallurgy within a new energy complex process.
In order to achieve an efficient operation from an energy, economic and environmental point of view, competitive alternative ironmaking technologies have been extensively investigated since the 1960’s, which can be classified into two main types. According to the final product of the processes (sponge iron and hot metal), these processes can be grouped as direct reduction DR processes and smelting reduction SR processes. According to the type of fuel used, these processes can also be grouped as gas-based and coal-based processes.
Table 1.2 illustrates the important characteristics and current status of some selected alternative ironmaking processes. More than the direct reduction process, with solid iron as end product, the SR process can be regarded as a direct competitor of the conventional blast furnace as the product is liquid pig iron or (in some cases) liquid steel. The smelting reduction process has several advantages compared to the conventional blast furnace process as mentioned below, which may lead to the adoption of smelting reduction as the main process for hot metal production in the future.
It is also recognized that any alternative ironmaking processes ultimately are strongly dependent on local conditions such as availability and the cost of natural gas, power and coal, as well as on product requirements. The economics, possibilities and limitations are still largely unknown. Several smelting reduction processes are under further development.
The process variants differ in the number of reactors, operating temperature, the ore feed (pellet, lump ore or fines). The variant processes that are relatively well developed are: COREX, DIOS, HIsmelt, CCF, Romelt and HIsarna. The most promising direct reduction processes in the worldwide include Hyl III, Midrex, Circored, Circofer, FASTMET and Finmet. Midrex and Hyl III are the only truly established gas based direct reduction processes. The increasing price of the natural gas hampered the development of the gas based direct reduction process.
On the other hand, both of them are fed with pellet and lump ore, which results in a high operating cost compared to fines-based processes. However, the sharp drop in gas prices due to the Marcellus shale development has led to resurgence in interest in gas based DRI production. COREX is the first commercially operating alternative to the blast furnace for hot metal production, and HIsmelt is the world's first commercial smelting process for making iron straight from the ore. In addition, HIsmelt is the only hot air based direct smelting process, enabling to recycle a significant proportion of off-gas as fuel for air preheating.
References 1. New technology of blast furnace of high efficiency and low CO2 emissions smelting by hydrogen-rich and pure oxygen and research of new smelting technologies by blowing scraps with energy, Accessed 05-2016; 2. Y.Qu: Experimental Study of the Melting and Reduction Behaviour of Ore Used in the HIsarna Process, PhD thesis, Northeastern University, Shenyang, China, 2013, ISBN: 978-90-6562-330-0.
Date Published: Sep-2016
输入搜索词:
搜索项
全文 关键字
标题 摘要
The Total Materia database contains many thousands of iron materials across a large range of countries and standards.
Where available, full property information can be viewed for materials including chemical composition, mechanical properties, physical properties, advanced property data and much more.
Using the Advanced Search page, define the search criteria by selecting ‘Iron’ in the Group of Materials pop-up list. It maybe that you need to further narrow the search criteria by using the other fields in the Advanced Search page e.g. Country/Standard.
Then click Submit.
A list of materials will then be generated for you to choose from.
After clicking a material from the resulting list, a list of subgroups derived from standard specifications appears.
From here it is possible to view specific property data for the selected material and also to view similar and equivalent materials in our powerful cross reference tables.
Click on the property data link of interest to you to view specific property data.
For you’re a chance to take a test drive of the Total Materia database, we invite you to join a community of over 150,000 registered users through the Total Materia Free Demo.