Plant and Machinery

Modular construction for customized flexibility

The key component in hot briquetting is a specially designed roller press. The entire plant for the hot briquetting of sponge iron typically consists of:

  • Briquetting press with screw feeder and material supply
  • Briquette string separator
  • Hot screen for elimination of fines
  • Product cooler
  • Bucket elevator for re-circulation of hot fines to briquetting press, plus chutes and accessories

The direct-reduced iron is discharged hot from the reduction process and pushed into the nip between the two synchronized, counter-rotating rollers. The briquettes are formed by pockets in the rollers. This process typically takes place at temperatures of around 700 °C and specific pressing forces of up to 180 kN/cm of active roller width. The continuous string of briquettes emerging from the rollers is guided by a heavy chute and usually separated into singles.

Roller presses for hot briquetting are equipped with additional features to cope with the high operational temperatures:

  • Water-cooling of heat-sensitive parts such as the pressing tools
  • Inert gas supplied via various feed points to reduce re-oxidation of the DRI within the roller press
  • Use of high temperature-resistant steels
  • Parts designed to allow for thermal expansion
  • Specific pressing forces up to 180 kN/cm

Roller Press for Hot Briquetting

Click on the illustration for more details
Roller Press for Hot Briquetting
original_11.jpg main_drive_11.jpg water_cooling_system.jpg press_frame_11.jpg material_feeder_11.jpg rollers_11.jpg hydraulic_system_11.jpg
original Main Drive Water Cooling System Press Frame Material Feeder Rollers Hydraulic System