Process for producing reduced iron powder

An efficiency energy-saving process for producing reduced iron powder is implemented through the technical scheme as follows: firstly, the process comprises the following steps of: 1) dosing high-purity iron concentrate fines/mill scales, a reducing agent and an adhesive according to certain proportions, mixing all the materials together and subjecting the mixture to wet grinding treatment, and forming the ground mixture into green balls through pelletizing/pressing into ball; 2) after the green balls are screened and dried, putting the green balls in a rotary hearth furnace for primary reduction, thereby obtaining sponge iron, wherein as the iron core powder is in direct contact with the reducing agent, the reducing speed is high, the time consumed is short and the production efficiency is high; and the high temperature smoke at 1000-1100 DEG C of the rotary hearth furnace enters a smoke waste heat recovery system, thereby realizing efficiency utilization of heat energy; and 3) after performing crashing, magnetic selection and screening on the sponge iron, performing secondary reduction in a steel strip type reducing furnace, and performing crashing, screening and blending on the obtained powder cake, thereby obtaining the reduced iron powder; and 4) the process for producing the reduced iron powder effectively solves the problems of low reduced iron powder productivity, poor quality stability, low heat utilization ratio, high working intensity, bad working environment and the like.