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Reheating- and heat treatment furnace

Process Description

Due to production conditions slabs cool before processing to the final product, re-heating ovens heat the slabs up again.

Subsequent heat treatment can change the material structure and characteristics of the slabs. The annealing process is one of several heat treatment steps. The material is heated in a controlled manner and - depending on the desired property - cooled at different speeds after a certain holding time. For this purpose, continuous but also discontinuous heat treatment furnaces of various types are used.

Forging furnace with Oxipyr flame

The energy input in the ovens is either electrically or by means of burners, with burner systems and burner position differing in the various ovens. In principle, burner systems with air/oxygen enrichment and oxyfuel burners have a higher thermal efficiency and other advantages over cold air burner systems.

Gas Application

Oxyfuel burner 

The combustion processes are carried out by means of an oxygen burner (oxy-fuel burner), which is operated with pure oxygen or with oxygen-enriched air as oxidant. Compared to burners that use air as an oxidant, oxy-fuel burners have a number of process technology advantages:

  • Higher combustion efficiency
  • Higher melting performance            
  • Faster heating-up times
  • Lower fuel consumption
  • Higher processing temperatures possible
  • Faster reaction speeds
  • Lower exhaust gas levels
  • Less dust
  • Lower emissions
  • Lower production costs

Messer SOlution

In addition to the gases required for your process, Messer offers a variety of equipment for its optimisation under the brand names Oxipyr and Oxijet. 

In order to select the optimum system, experts from Messer first carry out a comprehensive process analysis. Following calculations and basic engineering, suggestions are made for optimisation and further procedures

Continuous reheating furnace with Oxipyr burner in heating zone

Oxipyr – Burner Technology

The characteristics of the burner types are multi-faceted and range from low to high momentum burners, oxyfuel to oxygen/air mixing burners and burners for different fuels or fuel combinations. The systems are controlled manually, semi- or fully automatically following compositions or temperature.

Oxipyr

Fuel

 

Burner protection

Flame

Burner Technology

gas

Liquid

solid

low NOx

refractory material

traversing device

cooling

monitoring

ignition

Oxipyr – P

X

 

 

 

X

X

X

X

X

Oxipyr – F

X

X

X

X

X

X

X

X

X

Oxipyr – Flex

X

X

X

X

X

X

X

X

X

Oxipyr – Air

X

X

X

X

X

X

X

X

X

Oxipyr – SVNR

X

X

X

X

X

X

 

X

X