North Korean red iron dressing

Hematite and hematite have a higher proportion in the selected ores.Most of them are distributed in anshan, China, kursk magnetic anomaly region of the former Soviet union, Michigan, Canada, Quebec, Brazil and Libya.Hematite - based ores are mainly coarse grained ore with good physical properties.The hematite in China has the disseminated structure of fine and fine grains embedded, and it mainly contains hematite and the proportion of hematite and magnetite in quartz-hematite-magnetite varies greatly.

Ball mill and bar mill are widely used in hematite dressing equipment.In the ball mill, only the lattice type and the overflow type are used at present.Cone type ball mill because of its low productivity, is not manufactured, but some old concentrator is still in use.

Magnetic separation: a hematite separation method based on the magnetic difference between minerals in an uneven magnetic field.At present, many kinds of magnetic separators are used at home and abroad.

Crushing equipment is essential in hematite dressing equipment.There are many kinds of crushing equipment used in industry.The crushing equipment can be divided into jaw crusher, cone crusher, roller crusher, impact crusher and grinder according to the working principle and structural characteristics.

Hematite ore dressing technological process:

Now the magnetic separation - gravity separation process, magnetic separation - separation process or gravity separation - magnetic separation - flotation process are commonly used.Some factories first recover hematite by reprocessing.Then magnetite is recovered by gravity separation from the magnetic separation tailings.Floatation and electrical separation are also used to select, or use fine screen treatment before the final section.In the process of magnetic separation-gravity separation, magnetite is firstly recovered by weak magnetic separation, and then hematite is recovered from magnetic separation tailings by gravity separation method.The magnetic separation-flotation process takes flotation as the main process of separating hematite concentrate. Coarse hematite and magnetite are recovered by gravity separation method, and fine magnetite is recovered by magnetic separation method.

Hematite ore dressing can be carried out by the methods of ore washing, gravity dressing, flotation, magnetic separation and roasting magnetic separation, or by flotation and electric separation as concentration operations.For coarse or massive ores mixed with depleted materials, heavy suspension is often used for ore dressing.