Introduction
UCAR carbonaceous refractory materials have been successfully utilized in over 400 blast furnaces worldwide. Additionally, hundreds of linings have been provided for melting cupolas and submerged arc furnaces for the ferroalloy, foundry, thermal phosphorous and silicon metal industries.
UCAR manufactures a complete range of carbonaceous refractories, including amorphous carbon block, semi-graphitized carbon, graphite, graphitic rams, carbonaceous cements, and graphitic grout. At the heart of our product line is our family of unique, proprietary HotPressed™ carbon and semi-graphite bricks.
The combination of UCAR's Hot-Pressed™ products and the unique UCAR refractory system is the only hearth wall concept that has been proven to eliminate "elephant's foot" deterioration wherever it has been used. The true value of our knowledge comes in developing a long-term partnership, from project inception through commissioning and operation. UCAR welcomes opportunities for cooperation, and we encourage you to take advantage of our technical expertise early in your project planning phase. On-site technical seminars are a great way to introduce your key personnel to furnace lining technology. Our experts are also available to assist with refractory system configuration, installation planning and supervision, as well as operation, maintenance and monitoring assistance.
Key Products List:
@ NMA Hot Pressed Carbon Brick
@ NMD/NMGS/NMS Hot Pressed Semi-graphite Brick
@ Carbon D Carbon Block
@ CJR/CS/CSX Graphite
@ C-34/C-38/C-46 Carbonaceous Cement
@ RP-3/RP-4 Carbon Ramming Paste
@ RP-10 EZ-Ram Graphitic Ramming Paste
@ RP-20 Smartram® Graphitic Ramming Paste
@ GR-37 Graphitic Grout
UCAR Refractory Systems
Proven carbon bricks offering superior performance in demanding blast furnace and submerged arc furnace refractory linings.
Features:
-high thermal conductivity
-low permeability
-high density
-high cold crushing strength
-easy to handle
-high resistance to chemical attack
-proven HotPressed ™ characteristics
NMD ™ HotPressed ™ Semigraphite Brick
Proven semigraphite bricks offering superior performance in demanding
blast furnace and submerged arc furnace refractory linings.
Features:
-very high thermal conductivity
-very low permeability
-high density
-very low ash content
-easy to handle
-high resistance to chemical attack
-proven HotPressed ™ characteristics
KEY PROPERTIES
Typical
Average
Thermal Conductivity (W/mK) (WG) 18
Permeability (millidarcys) (WG) 10
Bulk Density (g/cm 3 ) 1.61
Crushing Strength (kPa) (AG) 35000
Ash (%) 12
Properties listed are typical and cannot be used as accept/reject specifications.
NMA ™ HotPressed ™ Carbon Brick
KEY PROPERTIES
Typical
Average
Thermal Conductivity (W/mK) (WG) 70
Permeability (millidarcys) (WG) 5
Bulk Density (g/cm 3 ) 1.82
Crushing Strength (kPa) (AG) 28000
Ash (%) 9
C34™ Cement
Description: This product is a two part carbonaceous heat setting cement and was developed specifically as a mortar for use between carbon or graphite structural shapes. C34™ Cement is used extensively in blast furnaces, cupolas, ferroalloy furnaces, phosphorus furnaces, runout troughs and other metallurgical applications. It thermally cures to form a strong carbonaceous bond between the cemented shapes.
Detailed instructions and precautions for using C34™ Cement are available from UCAR’s representatives.
Warranted Properties Typical Comparable ASTM Test Procedure
Bulk Density (Solid) (gm/cc) 1.60 ASTM C559
Informational Properties Typical Comparable ASTM Test Procedure
@ 850°C Joint Strength (kPa) 10,300
(Measured on Graphite at 20°C)
@ Thermal Conductivity (W/mK) 5 ASTM C714
(at 20°C)
The proprietary HotPressed ™method of manufacturing produces carbon & semigraphite refractories with low permeability, superior resistance to chemical attack & outstanding thermal conductivity.
These HotPressed ™ refractories have an unsurpassed track record of reliable service in metallurgical processes around the world. The automated manufacturing process ensures very high consistency in important properties adding to the excellence in performance.
