Smelting steel tailings micro-powder production method and apparatus thereof

The present invention relates to the field of steel tailings micro-powder utilization, particularly to a smelting steel tailings micro-powder production method and an apparatus thereof. The method comprises steps such as material feeding and weighing, and is characterized in that weighed raw materials sequentially form process connections with a magnetic device, a static separator, a dynamic powder selection device, a high pressure roller press and a finished product warehouse, wherein a material outlet of the high pressure roller press is connected with a material feeding port of the magnetic device through a bucket elevator so as to achieve multiple material external circulations, multiple material magnetic separations, and efficient roller pressing crushing. Compared with the method and the apparatus in the prior art, the method and the apparatus of the present invention have the following beneficial effects that: 1) with the magnetic device, it can be effectively ensured that magnetic substances can be separated at the same quality; 2) with the static separator, half finished products are primarily separated, such that powder selection efficiency of the follow-up dynamic powder selection device is increased, and the condition that a specific surface area of the finished product is more than or equal to 450 m /kg is met; 3) the high pressure roller press has characteristics of high operation rate and low power consumption so as to substantially improve steel tailings powdering efficiency; and 4) influence on the high pressure roller press service life by the magnetic substances is reduced.