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
  • 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

Gas Cleaning Services

GCT provides gas cleaning services such as process gas handling, fugitive emission control, bulk material handling, and more.


GCT provides waste heat recovery solutions, plant energy audits, decarbonization roadmap development, and many more energy services.


GCT is proud to provide hydrogen services for applications such as metallurgical reduction, industrial thermal heat, and power generation.

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