From: Erik Boleman 

Sent: Wednesday, August 02, 2006 12:00 PM 

To: Jack Kennedy; Beth Havlik; Erik Boleman; Tony Shoberg; Teresa L. Kinder; Andrew Skoglund 

Cc: George Pruchnofski; Mike Hansel; Joel Trinkle 

Subject: Discussion with Low-NOx Burner Vender 

We finally tracked down the low-NOx burner vender! 

Beth, Jack, and Erik had a phone conversation this morning with Koen Meijer of Danieli-Corus, and two of 

his co-workers. Their office is located in the Netherlands. The following is a description of the company 

from their website (http://www.danieli-corus.com/): 

Danieli Corus supplies tailor-made solutions for the Primary Metals Industry. Using proven 

technology from Corus' state-of-te-art integrated mills in The Netherlands and UK, as well as from 

our licensors and other world-wide sources, we help our clients achieve maximum 

performance. Based on specialized know-how and vast operational experience, Danieli Cor us 

offers engineering and contracting services as well as consultancy in all areas of ironmaking and 

steelmaking and at all levels of development. From greenfield projects to advanced optimization 

in established operations, Danieli Corus supports its clients all over the world. Danieli Corus is a 

client-focused, solutions-driven company. It offers an integrated approach to all aspects essential 

to success in an increasingly competitive global industry. 

Danieli-Corus recently completed a major NOx study and low-NOx burner retrofit at a straight-grate 

taconite induration furnace. They looked at several technologies, including standard low-NOx burners 

and flue gas recirculation. But the best technology was a water-cooled burner to reduce the peak flame 

temperature and therefore reduce thermal NOx formation. A couple of details: 

• 50% NOx reduction (if we heard correctly, the pre-installation NOx was 225 ppm or 380 mg/MJ) 

• Straight grate furnace 

• Air from preheater = 950*C 

• Furnace temperature = 1300*C 

• Furnace O2 concentration = 18% 

• Burners were designed and constructed specifically for this application 

• The new burners were designed to fit into the original burner port 

• This is the only facility that they have using that technology 

• Water use is 0.1 to 1.0 liter of water per cubic meter of natural gas 

• Due to the water cooling, the gas consumption increased with the new burners but they didn’t 

know % increase 

• Spent lots of time on the initial NOx technology study 

• Lot of engineering costs to design the correct burner 

• The technology has not been sold outside of their company. No literature is available. 

Our conclusions based on this conversation are: 

• Since there is only one facility using the technology and the technology has not been sold outside 

of their company, this probably is not an “available” technology per BART 

• However, we will pursue additional information from the vender and share it with the BART group 

and the clients 

• If time allows, we will model a 50% control scenario to see what improvement this technology 

would get 

PICS – do you agree with the approach that this is not an “available” technology? 

Please contact me if you have any questions or comments. 
Erik Boleman 

Barr Engineering 

Toll Free: (800) 786-5830 x8209 

Office: (218) 529-8209 

Mobile: (218) 393-9116

From: Erik Boleman 

Sent: Wednesday, August 02, 2006 11:13 AM 

To: 'Meijer, K' 

Cc: Erik Boleman; Beth Havlik; Jack Kennedy 

Subject: RE: Low-NOx Burners for Taconite Indurating Furnaces

Mr. Meijer, 

I would like to thank you and your colleagues for your time and information. This technology seems quite 

promising and we look forward to learning more about it. 

As we discussed, we will get you some specific design information either today or tomorrow morning. We 

will get the following information: 

• Number of burners 

• Burner sizes (Million Btu/hr) 

• Fuel type 

• Air temperature 

• Furnace temperature 

• Existing NOx emissions 

Please let me know if you need any other information. 

Thanks again, 

Erik Boleman 

Barr Engineering 

Toll Free: (800) 786-5830 x8209 

Office: (218) 529-8209 

Mobile: (218) 393-9116