Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Dust Removal Makes Steel Production More Efficient

25.02.2013
A new dedusting technique for crude steel production operations improves energy recovery and the recycling of dust from blast furnace exhaust gases.

The newly developed Simetal Merim process from Siemens boasts an energy recovery level 20-30 percent higher than that achieved by conventional dedusting plants.



A Simetal Merim dedusting plant is now being installed for use with a new blast furnace at a facility operated by Turkish steel producer Kardemir. The Merim (Maximized Emission Reduction and energy recovery in IronMaking) process does not require water or sludge processing facilities, which frees up space and lowers the required investment. The new dedusting plant in Turkey is scheduled to go into operation in the second half of 2013.

The blast furnace process for manufacturing crude steel creates a very dusty exhaust gas (blast furnace gas), which can be used for energy recovery by having it drive a turbine. All dust must be removed from the gas beforehand, however; otherwise the turbine blades will be damaged. Furnace dust consists mainly of fine and coarse ore particles that can be recycled after being separated.

Wet-type dedusting techniques that produce wastewater and sludge as byproducts have commonly been used up until now. Another possibility is to employ dry-type dedusting units. Their dust filters are very temperature-sensitive, however, which is why the technique is not utilized very extensively.

The newly developed Merim dry-type dedusting method enables optimal purification of the exhaust gas prior to the energy recovery process, as well as efficient separation of the dust into useful and non-useful components. With the help of a two-stage dry-type dedusting process that includes an innovative centrifugal separator and fabric filters, the Merim system improves the energy recovery performance of furnace gas turbines by 20-30 percent.

Siemens' patented Advanced Temperature Control System solves the problem of fabric filter temperature sensitivity by continually maintaining a furnace gas temperature of between 80 and 250 degrees Celsius. This ensures the fabric filters are not damaged by excessively high temperatures, and that no deposits can build up through condensation at low temperatures. To this end, the blast furnace gas is either cooled by injecting water or heated using a burner.

Merim lowers the dust content in blast furnace gas to less than three milligrams per standard cubic meter and achieves a useful dust component separation efficiency of up to 90 percent. The plant in Kardemir is designed to be able to clean a maximum of 400,000 standard cubic meters of blast furnace gas per hour.

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

More articles from Power and Electrical Engineering:

nachricht Multiregional brain on a chip
16.01.2017 | Harvard John A. Paulson School of Engineering and Applied Sciences

nachricht Researchers develop environmentally friendly soy air filter
16.01.2017 | Washington State University

All articles from Power and Electrical Engineering >>>

The most recent press releases about innovation >>>

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

Im Focus: Designing Architecture with Solar Building Envelopes

Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.

As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...

Im Focus: How to inflate a hardened concrete shell with a weight of 80 t

At TU Wien, an alternative for resource intensive formwork for the construction of concrete domes was developed. It is now used in a test dome for the Austrian Federal Railways Infrastructure (ÖBB Infrastruktur).

Concrete shells are efficient structures, but not very resource efficient. The formwork for the construction of concrete domes alone requires a high amount of...

Im Focus: Bacterial Pac Man molecule snaps at sugar

Many pathogens use certain sugar compounds from their host to help conceal themselves against the immune system. Scientists at the University of Bonn have now, in cooperation with researchers at the University of York in the United Kingdom, analyzed the dynamics of a bacterial molecule that is involved in this process. They demonstrate that the protein grabs onto the sugar molecule with a Pac Man-like chewing motion and holds it until it can be used. Their results could help design therapeutics that could make the protein poorer at grabbing and holding and hence compromise the pathogen in the host. The study has now been published in “Biophysical Journal”.

The cells of the mouth, nose and intestinal mucosa produce large quantities of a chemical called sialic acid. Many bacteria possess a special transport system...

Im Focus: Newly proposed reference datasets improve weather satellite data quality

UMD, NOAA collaboration demonstrates suitability of in-orbit datasets for weather satellite calibration

"Traffic and weather, together on the hour!" blasts your local radio station, while your smartphone knows the weather halfway across the world. A network of...

Im Focus: Repairing defects in fiber-reinforced plastics more efficiently

Fiber-reinforced plastics (FRP) are frequently used in the aeronautic and automobile industry. However, the repair of workpieces made of these composite materials is often less profitable than exchanging the part. In order to increase the lifetime of FRP parts and to make them more eco-efficient, the Laser Zentrum Hannover e.V. (LZH) and the Apodius GmbH want to combine a new measuring device for fiber layer orientation with an innovative laser-based repair process.

Defects in FRP pieces may be production or operation-related. Whether or not repair is cost-effective depends on the geometry of the defective area, the tools...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

Nothing will happen without batteries making it happen!

05.01.2017 | Event News

 
Latest News

Multiregional brain on a chip

16.01.2017 | Power and Electrical Engineering

New technology enables 5-D imaging in live animals, humans

16.01.2017 | Information Technology

Researchers develop environmentally friendly soy air filter

16.01.2017 | Power and Electrical Engineering

VideoLinks
B2B-VideoLinks
More VideoLinks >>>