### Gischia, Scott From: Sent: To: Beth Havlik [bhavlik@barr.com] Wednesday, August 02, 2006 2:23 PM Gischia, Scott; Laird, Katherine M. Cc: Subject: Wagner, Dennis; Rogers, Steven G.; Erik Boleman; Teresa 

### L. Kinder; George Pruchnofski FW: Discussion with Low-NOx BurnerVendor

We finally heard back from the low-NOx burnervendor. This technology is not currently available, but it could be promising for the taconite industry. They have installed burners with water injection at ataconite pellet plant in Europe and they geta 50% reduction in NOx emissions. They will develop some ballpark costs ifyou can provide • Numberofburners • Burner sizes (Million Btu/hr) They asked for additional information thatwe already have from you, see below. See also more details on the information they provided. I'm sorry we couldn't include your people in this preliminary call. We only had 15 minutes notice on when the call would occur. Ifyou're interested, we can arrange a call at a latertime. Beth T. Havlik, P.E. Barr Engineering 450 South Wagner Road Ann Arbor, Ml 48103 800/270-5017 ext. 1206 toll free 734/327-1200 ext. 1206 phone 734/327-1212 fax 734/255-0269 mobile bhavlik@barr.com

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 burnervendor! Beth, Jack, and Erik had a phone conversation this morning with Koen MeijerofDanieli-Corus, and two ofhis co-workers. Theiroffice is located in the Netherlands. The following is a description ofthe companyfrom theirwebsite (http://www.danieli-corus.com/): Danieli Corus supplies tailor-made solutions forthe 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 otherworldwide sources, we help our clients achieve maximum performance. Based on specialized know-how and vast operational experience, Danieli Corus offers engineering and contracting services as well as consultancy in all areas ofironmaking and steelmaking and at all levels ofdevelopment. From greenfield projects to advanced optimization in established operations, Danieli Corus supports its clients all overthe 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. Butthe best technology was awater-cooled burnerto reduce the peakflame temperature and therefore reduce thermal NOx formation. A couple ofdetails:

• 50% NOx reduction (ifwe heard correctly, the pre-installation NOxwas 225 ppm or380 mg/MJ) • Straight grate furnace • Air from preheater

# =950*C • Furnace temperature

# =1300*C 1• Furnace 02 concentration

# =18% • Burners were designed and constructed specifically forthis application • The new burners were designed to fit into the original burner port • This is the only facility thatthey have using thattechnology • Water use is 0.1 to 1.0 literofwater per cubic meterof natural gas • Due to the water cooling, the gas consumption increased with the new burners butthey didn't know % increase • Spent lots oftime on the initial NOxtechnology study • Lot ofengineering costs to design the correctburner • The technology has not been sold outside oftheir 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 oftheir company, this probably is notan "available" technology per BART • However, we will pursue additional information from the vender and share itwith the BART group and the clients • Iftime allows, we will model a 50% control scenario to see what improvementthis technology would get PIGS

- do you agree with the approach thatthis is not an "available" technology? Please contact me ifyou have any questions orcomments. 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 forTaconite Indurating Furnaces Mr. Meijer, Iwould like to thankyou and yourcolleagues for yourtime and information. This technology seems quite promising and we lookforward to learning more about it. As we discussed, we will getyou some specific design information eithertoday ortomorrow morning. Wewill getthe following information:

• Numberofburners • Burnersizes (Million Btu/hr) • Fuel type • Airtemperature • Furnacetemperature • Existing NOx emissions Please let me know ifyou need any other information. Thanks again, Erik Boleman Barr Engineering Toll Free: (800) 786-5830 x8209 Office: (218) 529-8209 Mobile: (218) 393-9116

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