Abstract: The research chose gravity dust from BF process and converter sludge from BOF process as the main raw materials and made them into cold bonded pellets with addition of a certain amount of reducing agent, binder and water, then experiments of self-reduction for pellets made of gravity dust and converter sludge in high temperature were conducted. The results show that mixing gravity dust and converter sludge and making them into cold bonded pellets can not only make up for the inadequacy of briquetting characteristic of single material, but also achieve the self-reduction of pellets and recycle fully the valuable substance such as Fe, C, CaO and so on; Metallization rate and dezincification rate of pellets made of gravity dust and converter sludge all rise with the increase of reaction temperature and can reach 91.35 % and 99.25 % respectively; As reaction time increase, metallization rate and dezincification rate of pellets also rise gradually and can reach 50.68 % and 75.82 % respectively when the reaction lasts for 5 minutes; As carbon addition amount rise, metallization rate and dezincification rate of pellets show the trend of decrease after the first increase, but the change is very small.

Key words: dust and sludge containing iron, resource utilization, cold bonded pellet, self-reduction, metallization rate, dezincification rate