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Shotcrete for Ash Hopper repair and relining
50 & 60 % LC Castable with Sodium Aluminate or Sodium Nitrite Accelerator Dispersant
Shotcrete mixer/ pump set-up
Two mixer/pumps used for rapid installation
Wet bottom ash hopper entrance
Wet bottom ash hopper located 200 ft from location of the mixer/ pump
Anchor installation coated with a bitimastic coating for water resistance and thermal expansion.
2 nozzles operated from 1 mixer / pump due to refractory being critical path
Y-section used to split the material feed line to operate 2 nozzles.
9” thick shotcrete lining installed for optimized mechanical resistance and superior refractory performance
150 tons of Shotcrete installed
Shotcrete installation completed at a rate of 12 tons per hour
Ash hopper unit after 2 years of service
No repairs required after 2 years of service
Prior refractory performance was 1 year until repairs needed
SHOTCRETE HAS EXTENDED THE REFRACTORY LIFE IN THE ASH HOPPER
Ash hopper unit after 2 years of service.