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)

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)

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