The Steel Manufacturers Association (SMA) has released its Public Policy Statement for 2013-2014. The SMA is the primary
trade association for scrap-based electric arc furnace (EAF) steelmakers.
Tenova Core and Tenova Goodfellow are both
associate member companies in the SMA. Tenova Core also has a representative on
the 2013 Associate Member Executive Committee.
EAF steel producers are the largest
recyclers in North America . Over 90
percent of the material input to EAFs is recycled ferrous scrap. EAFs also play
a large role in conserving energy – steel produced from melted scrap consumes
approximately one third the energy that steel produced from iron ore consumes.
The production share of EAF furnaces of
total steel production has grown from approximately 35% in 1990 to 60% in 2012.
In the back of the print copy of the Public
Policy Statement, there is a nice diagram of the EAF process flow. This simple
graphic prompted me to compare the standard EAF process with the expertise and
products that can be found within the Tenova Group. Many of the areas do have a
match. My summary of the Tenova capability is no doubt incomplete, but this is a good start.
__________
Steel
Scrap Handling
Scrap steel has a high weight per volume
and requires energy to receive and move around. Scrap steel is usually not
received in geometrically and compositionally homogenous states. Material
handling is therefore an important part of the EAF input process. I wasn’t able
to find a direct match in the Tenova Group to steel scrap materials handling. However,
Tenova Takraf is a world leader in materials handling for ore and mining
applications. They may have equipment in their product line that is suited for
steel yard and scrap handling.
__________
Electric
Arc Furnace
This is the heart of the EAF process where
the input material is melted down by electric arc. There are several areas of
the Tenova Group that have a high relevance to the EAF.
- Tenova Melt Shops manufactures electric arc furnaces. Tagliaferri is the historical brand of Tenova Melt Shops which has been designing and manufacturing EAFs since the very beginning of electrometallurgy.
- Consteel is a continuous metallic charge feeding and preheating system made by Tenova Melt Shops.
- EFSOP is an off-gas based process control technology produced by Tenova Goodfellow for energy optimization of electric arc furnaces.
- The KT Injection System is a wall-mounted, multi-point system for injecting oxygen and a wide range of fines of carbon, lime, DRI and other materials into the slag layer of an EAF.
__________
Ladle
Metallurgy Station
After tapping the molten steel, the ladle
metallurgy station fulfills several functions in preparing the melt to be
processed in the continuous casting machine. Ladle furnaces also act as a
buffer between the EAF and continuous casting line. Tenova Melt Shops offers complete
ladle furnace packages.
Tenova Melt Shops offers complete ladle
furnace packages including:
- Electric power supply
- Ladles
- Ladle transfer cars
- Additives charging and injections systems
- Dedusting
- Electrode make-up stations and other auxiliary equipment
__________
Caster
Continuous casting is the process by which
the molten metal is cooled and solidified into heavy steel strips called
billets, blooms, or slabs. The produced steel may be stored or immediately
rolled into finished products. There does not appear to be a Tenova company
that makes continuous casters.
__________
Rolling
Mill
Rolling mills further process the slabs and
strips into other semi-finished products such as bars, billets, beams, or wire.
The Tenova Rolling & Finishing division manufactures all kinds of strip
processing lines and cold rolling mills.
- Tenova Key Technologies - acid regeneration, iron oxide production, waste water treatment
- Tenova I2S - cold roll mills
- Tenova Presind Automation - integrated control systems and drives for processing lines and cold mills
- Tenova Multiform - strip processing line
and cold rolling mills in the Indian and Asian markets including
- Tenova Pomini - worldwide leader in production of roll grinders, for rolls belonging to flat products mills (steel and non-ferrous metals such as copper, aluminum) as well as paper mills.
__________
Finishing
and Shipping
Further processing into finished products
may follow the rolling mill or be integrated in with it. Inventory systems are
used to store and stage the finished products prior to delivery.
- Tenova Strip Processing – pickling, tinning, galvanizing, color-coating, silicon steel, stainless steel lines, and many others
__________
The Tenova Group is an intelligently
diversified company that covers many areas of the steel-making process. The
expertise accumulated among the Tenova companies is available to steel-makers
around the globe.
NOVA Analytical Systems plays a small role
in this value chain by manufacturing gas analysis equipment for a wide range of
industries.
For information on gas analyzer systems,
give Mike or Dave at Nova a call, or send us an e-mail.
1-800-295-3771
sales at nova-gas dot com
websales at nova-gas dot com
http://www.tenovagroup.com/-
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