Method for preparing ferroferric oxide nano-scale ultrafine powder through direct-current spinning, impacting and mixing

The invention relates to a method for preparing ferroferric oxide powder, in particular to a method for preparing ferroferric oxide nanoscale superfine powder through direct-current spinning, impacting and mixing. According to the method, collision is carried out in the conical reaction chamber through a direct-current rotary collision technology, generated heavy-phase particles flow out through a lower discharging opening, other mixed materials are continuously mixed in the reaction chamber, the retention time of the particles in a collision area is prolonged, and contact and mixing are more sufficient. In addition, the product is treated by washing, filtering, drying and grinding devices to obtain powder particles meeting requirements. The preparation efficiency of the ferroferric oxide powder is effectively improved, the size and distribution of the ferroferric oxide powder particles can be regulated and controlled by controlling the operation parameters of the device, and the preparation of the ferroferri