Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

More Flexibility for Steel Production

27.01.2014
Siemens enables steel mills to adapt their production processes more flexibly to raw material prices and emission regulations.

The newly developed JET Process provides sufficient heat energy to melt a high proportion of scrap and sponge iron into liquid pig iron. As a result, steel producers can more easily take advantage of low prices for these materials.



And because producing pig iron in a blast furnace creates especially large amounts of carbon dioxide, this new process also reduces CO2 emissions. This JET technology is already operating successfully in a steel mill in Asia.

The JET process uses a bottom-blowing converter. Such converters contain melted pig iron, scrap, and sponge iron. By blowing oxygen into this molten mass from below, these materials are processed into steel. Lime or other materials are introduced to promote the formation of slag. The amount of scrap and sponge iron in bottom-blowing converters may not exceed one fifth of the amount of pig iron. If this proportion were any larger, the scrap and sponge iron would no longer melt into the molten mass.

However, by injecting additional coal into the bottom of the converter, the JET process provides enough heat to enable a larger proportion of scrap and sponge iron to be added to the mixture. To achieve this result, a hot air lance blasts oxygen-enriched air at a temperature of around 1,300 °C onto the steel bath from above.

This hot blast travels at close to the speed of sound. It mixes the molten mass so completely that almost all of the carbon monoxide escaping from the bath reacts with the oxygen in the hot air blast, forming CO2 and heating the liquid steel. Additionally, coal is blown in from below, where it is used as fuel. This injection of coal is carefully controlled. The combination of a targeted introduction of coal and the hot air lance creates so much heat energy that the converter can be operated using only scrap and sponge iron. Moreover, due to their design, the oxygen jets located at the bottom of the converter slice through the scrap like cutting torches. As a result, the converter can be loaded with very large pieces of scrap.

These new special converters equipped with the JET process -make steel production less dependent on the availability of pig iron and allow more flexibility in blast furnace operations. With this innovation Siemens closes the gap between conventional converters, with their limits on the proportion of scrap and sponge iron they can accommodate, and electric-arc furnaces, which can only process steel scrap. JET technology can either be installed as a new facility or retrofitted into an existing plant.

Dr. Norbert Aschenbrenner | Siemens InnovationNews
Further information:
http://www.siemens.com/innovationnews

Further reports about: CO2 CO2 emission Flexibility JET Process Production line Steel carbon monoxide heat energy

More articles from Process Engineering:

nachricht Laser technology advances microchip production*
21.05.2015 | The Agency for Science, Technology and Research (A*STAR)

nachricht Diagnostics of Quality of Graphene and Spatial Imaging of Reactivity Centers in Pd/C Catalysts
20.05.2015 | Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences

All articles from Process Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Basel Physicists Develop Efficient Method of Signal Transmission from Nanocomponents

Physicists have developed an innovative method that could enable the efficient use of nanocomponents in electronic circuits. To achieve this, they have developed a layout in which a nanocomponent is connected to two electrical conductors, which uncouple the electrical signal in a highly efficient manner. The scientists at the Department of Physics and the Swiss Nanoscience Institute at the University of Basel have published their results in the scientific journal “Nature Communications” together with their colleagues from ETH Zurich.

Electronic components are becoming smaller and smaller. Components measuring just a few nanometers – the size of around ten atoms – are already being produced...

Im Focus: IoT-based Advanced Automobile Parking Navigation System

Development and implementation of an advanced automobile parking navigation platform for parking services

To fulfill the requirements of the industry, PolyU researchers developed the Advanced Automobile Parking Navigation Platform, which includes smart devices,...

Im Focus: First electrical car ferry in the world in operation in Norway now

  • Siemens delivers electric propulsion system and charging stations with lithium-ion batteries charged from hydro power
  • Ferry only uses 150 kilowatt hours (kWh) per route and reduces cost of fuel by 60 percent
  • Milestone on the road to operating emission-free ferries

The world's first electrical car and passenger ferry powered by batteries has entered service in Norway. The ferry only uses 150 kWh per route, which...

Im Focus: Into the ice – RV Polarstern opens the arctic season by setting course for Spitsbergen

On Tuesday, 19 May 2015 the research icebreaker Polarstern will leave its home port in Bremerhaven, setting a course for the Arctic. Led by Dr Ilka Peeken from the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI) a team of 53 researchers from 11 countries will investigate the effects of climate change in the Arctic, from the surface ice floes down to the seafloor.

RV Polarstern will enter the sea-ice zone north of Spitsbergen. Covering two shallow regions on their way to deeper waters, the scientists on board will focus...

Im Focus: Gel filled with nanosponges cleans up MRSA infections

Nanoengineers at the University of California, San Diego developed a gel filled with toxin-absorbing nanosponges that could lead to an effective treatment for skin and wound infections caused by MRSA (methicillin-resistant Staphylococcus aureus), an antibiotic-resistant bacteria. This "nanosponge-hydrogel" minimized the growth of skin lesions on mice infected with MRSA - without the use of antibiotics. The researchers recently published their findings online in Advanced Materials.

To make the nanosponge-hydrogel, the team mixed nanosponges, which are nanoparticles that absorb dangerous toxins produced by MRSA, E. coli and other...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

International symposium: trends in spatial analysis and modelling for a more sustainable land use

20.05.2015 | Event News

15th conference of the International Association of Colloid and Interface Scientists

18.05.2015 | Event News

EHFG 2015: Securing health in Europe. Balancing priorities, sharing responsibilities

12.05.2015 | Event News

 
Latest News

Mesoporous Particles for the Development of Drug Delivery System Safe to Human Bodies

22.05.2015 | Materials Sciences

Computing at the Speed of Light

22.05.2015 | Information Technology

Development of Gold Nanoparticles That Control Osteogenic Differentiation of Stem Cells

22.05.2015 | Materials Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>