Electric Arc Furnace EAF  Refractories - Resco Products

Electric Arc Furnace (EAF)


An Electric Arc Furnace (EAF) is a firebrick-lined U-shaped steel making vessel installed with a retractable roof. Graphite electrodes enter the furnace through the roof to melt the materials. The furnace is typically lined with resin-bonded magnesia-carbon products. This permits the EAF operator to run with slags that are neutral to very basic in composition.

Electric arc steelmaking uses magnesia-chrome compositions in part or total to handle their specific needs. Typical design requires different materials for the bottom, lower sidewall, and upper sidewall cold and hot spots.

Electric Arc Furnace Process

The EAF is refractory lined and filled with scrap and/or other manufactured iron units. The scrap is melted with high-powered electric arcs from the node/nodes creating molten metal. High-quality refractory brick is required to withstand the high temperatures reducing heat loss to create liquid steel.

Modern EAF vessels have oxygen burners on the side to prevent cold spots in the melting scrap metal process. Once the melt is complete it is transferred into a ladle to start the next process.

Refractories for EAF Vessel

Your Resco Products EAF steel representative will be able to access which brick will be necessary and the correct installation methods. Common Resco products utilized as EAF refractory consist of Nuline 10-99 and Nuline 15 DFP. These are mag-carbon brick utilized for their resistance to slag attack and high temperatures generated from generated arc energy.
EAF Diagram 3D - Resco Products   EAF Diagram - Resco Products

To view, a complete breakdown of recommended refractory products for an electric arc furnace by zone views our EAF Article. Resco products are also designed for optimal refractory wear, electric arc furnace maintenance, and extending the life of your vessel.

 

There are three main types of subhearths when constructing an electric arc furnace.  

EAF Deltas

The center of an EAF roof is called the delta. The delta faces three types of conditions: thermal, chemical, and mechanical. Your Resco Products refractory representative can evaluate your processes and the conditions to determine the best refractory pre-cast products to deal with the combination of these factors to provide the best life at the best cost/ton.

View our Electric Arc Furnace pdf

 
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Denspak OArrow icon

Denspak O is a tempered ramming mix formulated with high purity Olivine sands. Denspak O can be used for electric furnace runners.
Denspak O is a tempered ramming mix formulated with high purity Olivine sands. Denspak O can be used for electric furnace runners.
Alumina Brick

DuraLite 70 GArrow icon

Burned High Alumina Brick
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DuraLite 80 GArrow icon

High Alumina Brick
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DuraLite 85 GArrow icon

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EXKase Nucon 60Arrow icon

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EZ Cast 3250Arrow icon

EZ CAST® 3250 is a low cement castable with an alumina content of 78%. It has excellent abrasion resistance and superior hot strength to as high as 2700°F. These properties combined with excellent thermal shock resistance have resulted in many successful installations in bottoms and lip rings of steel ladles. This proven product has been successfully used in a wide variety of applications, often substituted for higher alumina content products, making it a highly cost-effective and versatile composition. Its combination of strength, toughness, alumina content, and other compositional features make it an excellent product for many applications.
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GRFG MortarArrow icon

GRFG MORTAR is a dry, air-setting basic mortar containing fused magnesia-chrome aggregate and can be applied by troweling or dipping consistencies. This basic mortar features excellent resistance to aggressive basic slags.
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GuidonArrow icon

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Kricon 32-70Arrow icon

KRICON® 32-70 is a 77% alumina, low iron castable with a 3200°F temperature limit. It offers improved slag resistance and positive reheat expansion at steel making temperatures to insure tight, crack-free linings in cast ladles and tundishes.
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Kricon 32-70 (UK)Arrow icon

KRICON® 32-70 is a 77% alumina, low iron castable with a 3200°F temperature limit. It offers improved slag resistance and positive reheat expansion at steel making temperatures to insure tight, crack-free linings in cast ladles and tundishes.
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Magnesia Brick

Krilex 621-2Arrow icon

KRILEX ® 621-2 is a low silica and direct-bonding combine to provide excellent resistance to basic slags, very low porosity and creep subsidence, and good thermal shock resistance. It is recommended for electric furnace slaglines, degassers, AOD vessels and smelting and refining furnaces in the copper and nickel industries.
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Krilex 621-2-CArrow icon

Re-Bonded Fused Grain Magnesite-Chrome Brick
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Nuline 10-99Arrow icon

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Nuline 13 DFArrow icon

Resin bonded, magnesia-carbon brick
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Nuline 20 NF TL0741Arrow icon

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Permanente 165 AF CastableArrow icon

PERMANENTE® 165-AF is a magnesite-based, basic castable with a unique, nonchromate bonding system and can be installed by vibration casting or ramming methods, to maximize properties.
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Permanente 165 AF Ram MixArrow icon

PERMANENTE® 165-AF RAM MIX is a fine sized high MgO material intended for leveling ladle bottoms and for backfill behind working linings in ladles, AOD degassers and other metallurgical vessels. It can be rammed or cast.
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Permanente MortarArrow icon

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Ref Cast 90FS LCArrow icon

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Plastic

Ref Ram 870FG-MArrow icon

Phos free, fine grain, high alumina, high quality matrix patch refractory possessing volume stability. Resistant to metal penetration with excellent density. Grain structure allows for this veneering. Workability consistent with use in some patching applications.
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Ref Ram 877FArrow icon

Fine grain, phosphate bonded high alumina plastic with corrosion resistant matrix. Grain structure adapted for ramming thin sections or patching. Good strength and volume stability.
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REPMIX (UK)Arrow icon

REPMIX is a 1500°C multipurpose Refractory Castable which can be Cast, Gunned or Trowelled into place.
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Rescocast 3 (UK)Arrow icon

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Rescomag MixArrow icon

Magnesite based ramming mix
Magnesite based ramming mix
Plastic

Rescoram 10CRArrow icon

RESCORAM 10 CR is a high alumina, phosphate-bonded plastic with 10% chromic oxide that is used throughout the metals producing industries. Its chemical bond develops high strength at lower temperatures. This property makes it ideal for application where there is insufficient heat to develop the ceramic bond required in heat-setting plastics.
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Plastic

Rescoram 7CRArrow icon

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Conventional Castable

SakoniteArrow icon

SAKONITE® is a very economical refractory concrete. Although its maximum service temperature is 2200°F, it is designed primarily for service between 70°F and 1000°F. It is widely used for cast floors exposed to molten metals or hot ingots. It can be cast or pumped and finished like ordinary concrete. It may also be rammed or cast-vibrated for increased density and strength with minimum shrinkage. SAKONITE® is also available as GC SAKONITE® gun mix.
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Low Cement Castable

Vibrocast 85 ULMArrow icon

VIBROCAST 85ULM is a Low Cement, 80% Alumina castable that can be installed by vibration cast methods only.
VIBROCAST 85ULM is a Low Cement, 80% Alumina castable that can be installed by vibration cast methods only.
Low Cement Castable

Vibrocast ASC-8LT CArrow icon

VIBROCAST ASC-8LT(C) is a high purity, low-cement, alumina-spinel castable designed to provide maximum resistance to molten steel and steelmaking slags. VIBROCAST ASC-8LT(C) is designed for production of cast shapes or monolithic placement in steel ladles and related steelmaking environments. This product should be installed by vibration casting only.
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Low Cement Castable

Vibrocast ASC-8LT C-CArrow icon

VIBROCAST ASC-8LT (C-C) is a high purity, low-cement, alumina-spinel castable designed to provide maximum resistance to molten steel and steelmaking slags. VIBROCAST ASC-8LT (C-C) is designed for production of cast shapes or monolithic placement in steel ladles and related steelmaking environments. This product should be installed by vibration casting only.
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