 |
Case Study:
Furnace Type: 7.5
tonne, 2.6 MW, 100 Hz coreless induction furnace
Metal Type:
aluminum, galvalume
Previous
Refractories: dry vibratable
|
|
|
Refractory Failure Mode:
Cracking and finning in the top 1 m (3 feet) of the side walls as well
as the furnace bottom due to mechanical impact from charging. This
operation’s practice is to charge large zinc sows into the furnace which
is partially filled with molten aluminum. Due to the inability to control
the charging of these large zinc sows, severe mechanical erosion and
fracture occurred at the top cap, upper side walls and furnace bottom.
To reduce this refractory failure mechanism (low fracture toughness of the
current dry vibratable refractory), the FRDV technology was
applied. The top cap and upper side walls as well as the bottom of this
coreless induction furnace were zoned with FRDV, while the lower
portion in the rest of the side wall of the furnace remained standard
non-wetting dry vibratable refractory.
|
|
|
FRDV experimental trial results:
The damage inflicted upon the refractory by the existing charging
practices has been substantially minimized. The customer prefers to
maintain a zoned lining to minimize costs.
|
|
|
Case Study:
Furnace
Type: 7.5 tonne, 2.6 MW, 100
Hz coreless induction furnace
Metal Type:
aluminum scrap
Previous
Refractories: dry vibratable
|
|
|
Refractory Failure
Mode: Cracking and
finning in the sidewalls of the furnace due to daily mechanical cleaning
and thermal cycling of the furnace. This particular coreless induction
furnace experienced similar failure to that described in Case Study 3, the difference being that it regularly cracked and finned down
through the majority of the furnace sidewall. The corrective approach was
to zone the FRDV material only into the sidewall to combat the
cracking.
|
|
|
FRDV experimental
trial results: The customer
was able to extend the service life of the refractory from 3000 tonnes
(approximately 2 months production) to 5500 tonnes (approximately 3 months
production). This approach to extending lining life was successful and
the customer is currently utilizing his fifth FRDV refractory lining.
|
|
|
|
Fiber Reinforced DRI-VIBE®
Technology for Aluminum Induction Melting
Fiber Reinforced
DRI-VIBE®
Technology for Zinc and Galvalume Induction Melting
Fiber Reinforced
DRI-VIBE®
Technology for Zinc and Galvalume Coating Pots
Allied Mineral Products Inc.
Phone: 614-876-0244 Fax: 614-876-3133
sales@alliedmin.com
|
Click Here to View Other
Featured Products
|
