### Gischia, Scott

From: Beth Havlik [ bhavlik@barr.com ]

Sent: Wednesday, August 02, 2006 2:23 PM

To: Gischia, Scott; Laird, Katherine M.

Cc: Wagner, Dennis; Rogers, Steven G.; Erik Boleman; Teresa L. Kinder; George Pruchnofski

Subject: FW: Discussion with Low

- NOx Burner Vendor

We finally heard back from the low

- NOx burner vendor. This technology is not currently available, but it could be

promising for the taconite industry. They have installed burners with water injection at a taconite pellet plant in Europe

and they get a 50% reduction in NOx emissions. They will develop some ballpark costs if you can provide

Number of burners

Burner si zes (Million Btu/hr)

They asked for additional information that we 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. If you're interested, we can arrange a call at a later time.

Beth T. Havlik, P.E.

Barr Engineering

450 South Wagn er Road

Ann Arbor, MI 48103

800/270

- 5017 ext. 1206 toll free

734/327

- 1200 ext. 1206 phone

734/327

- 1212 fax

734/255

- 0269 mobile



### bhavlik@bar r.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 burner vendor!

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. Th e 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 Corus off ers 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

- NO x 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 an d 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

1Furnace 02 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 bee n 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 g et 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

2