Pusher furnace systems are optimal for preheating and homogenizing milled slabs before the hot rolling process, showcasing exceptional energy efficiency and flow management. Their fully automated operation, electronic integration with the hot rolling train, and minimized energy consumption underscore the advantages of OTTO JUNKER's high convection technology embedded in this equipment.

These furnaces can be configured either as standalone units or arranged in parallel configurations with multiple units. This flexibility allows complex charging and discharging machines to efficiently serve several furnaces, providing cost benefits associated with shared investments.

All machines and furnace components are meticulously optimized for the specific process requirements, embodying OTTO JUNKER's standards of robust design and engineering excellence.

Benefits at a glance:

  • High convection technology for quick heating and cooling

  • Gas heated

  • Heating and homogenizing under air or nitrogen/protective gas

  • Model-controlled furnace controls to achieve short cycle times with low energy consumption

Pusher furnace systems consist of the following
main assemblies:

  • Loading table
  • Upender
  • Pusher system
  • Furnace
  • Extractor
  • Downender
  • Skid-shoe handling


  • Single or dual row charging, depending on slab size
  • Flexible charging of differently sized slabs
  • High convection technology for fast heating and cooling
  • Highly efficient self-recuperative high velocity burners
  • Temperature control based on metal temperature and numeric model data
  • Heating and cooling without off-temperature currents by uniform introduction of heat flows into the recirculating furnace atmosphere
  • Long-life low-friction skid systems ensuring a reliable and smooth slab transport


  • Automatic centering tables
  • Slab buffers
  • Cross-transfer car for charging multiple furnaces operating in a parallel layout
  • Single- and dual-row upenders
  • Pusher devices


  • Extractor systems
  • Cross-transfer car for unloading multiple furnaces operating in a parallel layout
  • Downender for placing slabs on the rolling mill feed table
  • Skid shoe return conveyor, adaptable to the specific application

Energy savings: the SLE Pusher Furnace ®

With this furnace type, the energy losses incurred through the furnace doors during charging/discharging operations are significantly reduced, ranging from a factor of 5 to 10, depending on the application. Consequently, the overall energy requirement for these systems is reduced by approximately 3%. OTTO JUNKER posits that the overall consumption can be further decreased by a two-digit percentage when integrating this furnace with a slab preheater. We would welcome the opportunity to personally present this equipment configuration to you and conduct a detailed assessment of the advantages specific to your application.

Rapid Slab Cooling
HiPreQ® Slab Quench

These systems are employed for the rapid cooling of rolling slabs from their homogenization temperature to the rolling temperature, driven by metallurgical considerations. By minimizing dwell times in the pusher furnace or cartridge furnace, these systems have the potential to enhance plant capacity.

An slab quench system consists of the following main components:

  • Transfer roller conveyor from the pusher / cartridge furnace to the slab quench
  • Slab quench
  • Transfer roller conveyor to the soak chamber
  • Soak chamber

Cycle time: 5 min

Temperature uniformity of slabs before hot rolling: ± 10 °C


3,000 - 8,500 mm


800 - 2,300 mm


250 - 820 mm

Weight of slab

32 t

Charge weight

200 t - >1,000 t


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