#207 - Tenova Goodfellow to optimize twin shell EAFs at Steel Dynamics Inc.

Mississauga, 17 February 2015: Tenova Goodfellow receives PO for two (2) EFSOP holistic optimization® systems including water detection for both twin shell EAFs at Steel Dynamics Inc. Butler, IN.

In Post #205, we discussed the basic operation of an electric arc furnace (EAF). One of type EAF is known as ‘twin shell’. From Wikipedia:

The scrap basket is then taken to the melt shop, the roof is swung off the furnace, and the furnace is charged with scrap from the basket. Charging is one of the more dangerous operations for the EAF operators…In some twin-shell furnaces, the scrap is charged into the second shell while the first is being melted down, and pre-heated with off-gas from the active shell…After charging, the roof is swung back over the furnace and meltdown commences. The electrodes are lowered onto the scrap, an arc is struck and the electrodes are then set to bore into the layer of shred at the top of the furnace. Lower voltages are selected for this first part of the operation to protect the roof and walls from excessive heat and damage from the arcs. Once the electrodes have reached the heavy melt at the base of the furnace and the arcs are shielded by the scrap, the voltage can be increased and the electrodes raised slightly, lengthening the arcs and increasing power to the melt. This enables a molten pool to form more rapidly, reducing tap-to-tap times.

Tenova Goodfellow has significant expertise in making this and other types of EAF operate more efficiently and effectively.

Steel Dynamics Inc., has confirmed an order with Tenova Goodfellow for the supply and purchase of two (2) EFSOP holistic optimization® systems for both EAF batteries at their SDI, Butler, IN steelmaking facility. Tenova’s innovative technology and value proposition will provide full spectrum evaluation via upstream and downstream offgas analysis and water detection technology for all 4 EAF shells. The scope of supply will also include newly developed optical sensors for the measuring of off-gas velocity and temperature.

The order which was received in December 2014, included project work that was scheduled to begin immediately with the manufacturing of hardware & sensors at TGI’s Hamilton, ON production facility, Nova Analytical Systems. Installation and commissioning of the systems is scheduled to take place by April 2015.

About SDI Steel Dynamics, Inc. - one of the largest domestic steel producers and metals recyclers in the United States based on estimated annual steelmaking and metals recycling capability, with annual sales of $7.4 billion in 2013, over 7,400 employees, and manufacturing facilities primarily located throughout the United States (including six steel mills, six steel processing facilities, two iron production facilities, over 90 metals recycling locations and six steel fabrication plants).

About Tenova Goodfellow - part of the Metals Division of Tenova and is a leader in the design and supply of process control technology for the EAF and BOF markets. Tenova is a worldwide supplier of advanced technologies, products and engineering services for the iron & steel and mining industries providing innovative, integrated solutions for complete process areas. Tenova's network companies operate in 26 countries on 5 continents with more than 4,900 people.

For more information on EAF optimization, please contact:

Tenova Goodfellow Inc.

6711 Mississauga Road, Suite 200

Mississauga, ON

L5N 2W3 - Canada

Phone +1 905 567 3030

Fax +1 905 567 3899

goodfellow@ca.tenovagroup.com