Abstract: Pelletizing and roasting property of 2 kinds of fine iron concentrate powder were studied. The results indicated, indexes of pelletizing property produced by 2# iron concentrate which mainly consist of magnetite ore were much better than 1# iron concentrate which mainly consist of hematite ore. Pellet produced by 1# iron concentrate needed higher preheating temperature and much longer preheating time to get the preheating ball could meet the production request of chain grate-rotary kiln, technology condition was much higher. The test indicated, damp milling pretreatment technology had effects of improving pellet preheating roasting property of 1# iron concentrate remarkably, strength of 1# iron concentrate pellet preheating ball could reach to 725 N through damp milling pretreatment, compressive strength of product pellet reached to 2 861 N, which met the qualified products standard.

Key words: Iron concentrate, Preheated pellets, Compressive strength, Damp milling