Drummond-GCT™ Water Cooled Hood

Factors affecting primary hood gas collection efficiency:
  • Mouth angle
  • Hood / door configuration
  • System draft
  • Infiltration rate
  • Apron plate/hood gap
  • Door/hood gap
  • Hood geometry
  • Hood cooling system
    • Panel design
    • Water velocity
  • Downstream infiltration
  • Physical condition of hood
Typical Primary Hood Problems:
  • Converter mouth blowing angle is too close to vertical
  • Door/hood joint is blasted by hot gas
  • Door/hood joint is under positive pressure
  • Excessive gas leakage
  • To prevent leakage, the system draft has to be increased; this results in excessive infiltration
  • Water leaks
    • Corrosion
    • Erosion
    • Insufficient water flow/velocity
    • Crane impacts
Moving the door joint out of the direct path of the process gas will improve gas capture.
Design advantages of Drummond-GCT Hood Design
  • Simple, low cost fabrication
  • Rugged, durable design
  • Low maintenance costs
  • No accretion build-ups
  • Long panel life
  • Easy installation
  • Simple operation
  • Closed circuit water system
    • Minimizes evaporation and build-up of dissolved solids
    • Reduces opportunity for oxygen entrainment minimizing internal corrosion
Primary and Secondary Hood