Effects of High Proportion Unground Sea Sand Ore on the Preparation Process and Reduction Performance of Oxidized Pellets

The New Zealand sea sand ore is a kind of vanadia–titania magnetite formed by erosion in the coastal zone. Because its coarse particle size, smooth spherical particles, complex chemical composition, it has been added to sinter as an auxiliary material. Based on principle optimizing blending strengthen advantages and weaken disadvantages, this paper used raw that not undergone any pretreatment main material prepared into oxidized pellets using disc pelletizer explored influence high-proportion unground preparation process reduction performance pellets. falling strength, compressive swelling index, degree was analyzed ICPAES, XRF, XRD, SEM-EDS, other detection methods, change laws influencing factors were analyzed. With increase amount used, strength green first decreased then gradually increased, while increased decreased. At same time, restricted. index generally show downward trend. However, after reduction. Through research pellet-forming properties ore, shown when 40%, can still be for blast furnace ironmaking. Thus, provided specific data support iron steel enterprises improve ratio reduce production cost.