Iron ore reduction using fluidized bed technology
The project investigated the phenomenon of 'sticking' which impedes the efficiency of Fluidized Bed technology in the production of sponge iron. 'Sticking' is the name given to the agglomeration of fine ores in fluidized bed reactors during the reduction process. Fluidized bed technology, using hydrogen rich gas, is potentially the most efficient and method of iron ore reduction for the future, therefore the project sought to find ways of reducing the sticking and thereby optimizing the efficiency of the process. The performances of eleven pre-tested ores were examined in a test fluidized bed with the use of an electron microscope, observing the ores at various temperatures. Agglomeration was found to begin at a temperature of 750?C. On the basis of these experiments, conclusions were made about the influencing factors and possibilities or precautions for the avoidance of sticking. Avoiding very fine material, and treating the ores with a water-cement or water-aluminiumoxide-slurry, both decreased the sticking behaviour of iron ore.
Bibliographic Reference: EUR 18637 DE (1998)
Availability: Available from OOPEC Sales agents
Record Number: 199910527 / Last updated on: 1999-03-26
Original language: de
Available languages: de,en