Iron-based magnetic fine powder manufacturing apparatus for use in a magnetic fluid separation system of suspended solids in wastewater and manufacturing method thereof

摘要

The present invention relates to a device for producing a magnetic fine powder in which a cohesive force such as a van der Waals force is generated between a suspended solids of a wastewater and a magnetic fine powder to form a floccule and a manufacturing method thereof. Is used to remove, dry, and classify the dust of iron ores, which are used as sintering furnaces in steel mills, or iron sludge generated from hematite reduction furnaces, or steel sludge discharged from steelmaking processes, In the magnetic fluid separation of the suspended solids in the wastewater in which the recovery efficiency of the magnetic fine powder is maximized by supplying the magnetic fine powder through a plurality of processes of pulverizing and pulverizing, Iron-based magnetic powder and a manufacturing method thereof.;To this end, the present invention relates to a method of manufacturing a magnetic fine powder for use in a magnetic fluid separation system for suspended solids in a wastewater, comprising: a step of preparing a magnetic iron powder for use in a sintering furnace in a steelworks, Removing the foreign materials contained in the dust of the steelmaking sludge and electric furnace discharged from the iron-based magnetic powder to obtain iron-based magnetic powders; drying the iron-based magnetic powder at a temperature of about 100 to 140C to a moisture content of 3 to 7% , Classifying the dried iron-based magnetic powder into smaller particles smaller than or equal to 1 to 2 mm and larger particles, and pulverizing the iron-based magnetic powder to a size of about 10 or less Features.