The application discloses
direct reduced iron and a preparation method thereof, and relates to the technical field of metallurgical
engineering. The by-product
direct reduced iron (DRI)
powder obtained through a rotary
hearth furnace is directly used for preparing
direct reduced iron, and part of iron-containing raw materials is replaced, so that the shortage of raw materials in the production of the rotary
hearth furnace is effectively made up, additional purchase of raw materials is not needed, the procurement cost of raw materials is reduced, and the continuity and stability of the production of the rotary
hearth furnace are improved. In addition, through reduction
roasting of the rotary hearth furnace, deep reduction of iron in the DRI
powder is realized, efficient
recovery of
iron metal in the DRI
powder is realized, and valuable
zinc elements in the DRI powder can also be recovered. In the application, the DRI powder with a certain particle size range is reused to the rotary hearth furnace, the raw materials are mixed and then formed into balls, a stable particle skeleton is formed, the structure of the dry-mixed material balls is compact after reduction, and the prepared DRI product has a reduced pulverization rate.