Underground Skip Car Life Increased
NanoSteel Liner Exceeds Life of 500 BHN Q&T plate by 300% and chrome carbide Overlay plate by 200%
Skip cars are used in underground mining for transporting ore in process from one station to the next. During loading and unloading, wear plate inside the cars are exposed to severe sliding abrasion.
In an underground gold mine in Canada, 20 ton capacity skip cars transport ore between two levels. During loading, ore drops 30 feet (9 meters) onto a wear plate deflector and slides into the car. During unloading, the skip car is tilted at a 30 degree angle on one side and the ore slides over the wear plate deflector onto a belt conveyor for transport to the next station.
To increase the life of the skip car deflector and reduce surface material loss, the mine installed a NanoSteel SHS 9800 overlay wear plate, 1/2 inch thickness (3/16 inch overlay on 5/16 inch substrate), for resisting sliding abrasion.
NanoSteel SHS 9800 overlay wear plate was removed from service for maintenance after deflecting more than 1 million tons of ore. This represents a wear life increase of 300% over Brinell 500 quench & temper (Q&T) monolithic wear plate, 5/8 inch thickness, and up to 200% over chrome carbide (CrC) overlay wear plate, 5/8 inch thickness (5/16 inch overlay on 5/16 inch substrate). Upon being placed back in service, mine engineers are predicting the NanoSteel SHS 9800 plate to exceed Q&T plate life by more than 400% before requiring replacement.
NanoSteel wear plate after 400K Tons
NanoSteel overlay wear plate after deflecting 410,000 tons and exceeding Brinell 500 Q&T plate life by 120%
NanoSteel wear plate after 600K Tons
NanoSteel overlay wear plate after deflecting 625,000 tons and exceeding Brinell 500 Q&T plate life by 180%
NanoSteel wear plate after 1M Tons
NanoSteel overlay wear plate after deflecting more than 1 million tons and exceeding Brinell 500 Q&T plate life by 300%