Community Research and Development Information Service - CORDIS


The aim of this joint research project of CRM, IRSID and TKS was to evaluate the recycling of the various iron-bearing wastes that arise in the steel industry by pre-processing theses wastes by the COMET direct reduction process. In order to simulate an industrial installation for the recovery of zinc and lead oxides in the fumes, the electrical heating system of CRM's pilot rotary hearth furnace was replaced with natural gas burners and the fumes evacuation system was modified and equipped with bag filter units. COMET pilot plant trials were carried out under various conditions with sinter plant ESP dust and with EAF dust micro-pellets. With the latter, the DRI produced contains 58% iron and nearly no more zinc. The DRI mechanical characteristics are a little poor to allow its use at the blast furnace. The dust collected in the bag filters is very rich in zinc oxide (55.3%) and in lead oxide (9.4%) and contains less than 0.4% iron, thanks to the very low dust carry away during charging and processing with the COMET process. The fumes were also sampled by IRSID in the various heating zones of the furnace. In order to develop a new charging system for "pasty" waste materials, a "cold" simulator was constructed. After several series of trials (with a rotary extractor and with an extrusion charging system), it has not been possible to develop a suitable technology for correctly charging the sludge on the rotary hearth.

Additional information

Authors: HANROT F, Arcelor Research, Maizières-lès-Metz (FR);MÜLHEIMS K, Thyssen Krupp Stahl AG, Duisburg (DE);ROSENPLÄNTNER R, Thyssen Krupp Stahl AG, Duisburg (DE);STEYLS D, CRM - Centre de recherches métallurgiques, Angleur (BE)
Bibliographic Reference: EUR 21693 EN (2006), 105 pp. Euro: 25
Availability: Katalogue Number: KI-NA- 21693-EN-S The paper version can be ordered online and the PDF version downloaded at:
ISBN: ISBN: 92-894-9519-7
Record Number: 200618655 / Last updated on: 2006-07-18
Original language: en
Available languages: en