Iron-based magnetic fine powder production apparatus and its method for use in magnetic fluid separation system of suspended solids in wastewater

摘要

The present invention relates to a magnetic fine powder production apparatus and a method of manufacturing the same, in which flocculation, such as van der Waals force, is generated between suspended solids and magnetic fine powder of wastewater to form flocs. Is the removal of foreign substances from the magnetic iron ore of fine powders used in the sintering process of steel making in ironworks, the magnetic iron generated from the reduction of hematite or the steel sludge discharged from the steelmaking process, or the dust of the electric furnace. In the magnetic fluid separation of the suspended solids in the waste water to maximize the recovery efficiency of the magnetic fine powder and to reduce the wastewater treatment cost by supplying at a low price as the magnetic fine powder is manufactured through a plurality of processes of grinding. The present invention relates to an apparatus for manufacturing iron-based magnetic fine powder and a method of manufacturing the same.;To this end, the present invention is a magnetic fine powder manufacturing method used in the magnetic fluid separation system of the suspended solids in the wastewater, the magnetic iron ore of the fine powder used in the sintering furnace of the iron making process in the steel mill, the iron powder and the steelmaking process generated in the reduction furnace Removing the foreign matter contained in the dust of the steelmaking sludge discharged from the electric furnace to obtain the iron-based magnetic powder, drying the iron-based magnetic powder at a temperature of about 100 ~ 140 ℃ to 3 to 7%, Classifying the dried steel-based magnetic powder into particles having a smaller particle size and larger alleles based on particles of 1 to 2 mm, and pulverizing the classified steel-based magnetic powder to about 10 μm or less. There is this.