Technology Partners :: Herbert Rothe Consulting

For The Temperature Controlled Processing of Wire Rod and Bar Products

Our patented quenching nozzles have an extremely high heat transfer coefficient achieved by an engineered combination of laminar and turbulent flow within the nozzle.

Applications

• Inter-stand cooling
• Wire rod mill water boxes
• Post-rolling quenching (for self tempered rebar)
  

Principle of Operation

Large quantities of low pressure water impact the hot bar in the primary cooling chamber with a very high kinetic energy. This high kinetic energy disrupts the steam jacket formation and allows for fully wetted cooling to occur immediately, bypassing the inefficient film boiling present in other designs. Inside the nozzle, precisely positioned secondary cooling chambers reintroduce turbulence, which again prevents vapour blanket (steam) formation for continued intense cooling.

Advantages

• Achieve maximum cooling within a minimum working area
• Precise control of actual heat transfer
• Low system water pressure requirements
• Minimum filtration required (no small orifices to clog)
• Concentric cooling of the bar/wire profile
• Uniform cooling along entire strand length
• Smooth travel through the quenching nozzle
• No bar/wire movement resulting from steam 'dancing' on bar