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Pusher-type furnace

Following the casting process, slabs or billets are transported to the hot rolling mill and heated to rolling temperature, e.g. in walking-beam furnaces or pusher-type furnaces. A pusher-type furnace operates semi-continuously and is characterized by high throughput rates and maximum heat transfer capacity. Cold slabs are pushed into the furnace where they initially slide on carrier rails, then on an equalizing surface to the discharge end. Typical issues concerning the heating process are the slab heating rate, the number of burners required and the influence of the carrier rails on the skid marks, i.e. the local temperature distribution, in the slab.

Targets

  • Shorter slab heat up time
  • Increasing heat transfer – radiation and convection
  • Cooling of carrier rails

Benefit

  • Reaction rates
  • Wall temperatures
  • Off gas temperatures
  • Cooling water temperatures

Continuous pusher-type furnace with normalized temperature distribution

Continuous pusher-type furnace with normalized temperature distribution Continuous pusher-type furnace with normalized temperature distribution Continuous pusher-type furnace with normalized temperature distribution Continuous pusher-type furnace with normalized temperature distribution