The invention discloses an efficient environment-friendly type
beneficiation method for low-grade
magnetic mirror iron ores. The efficient environment-friendly type
beneficiation method is characterized in that
iron ore concentrate which meets
smelting requirements is obtained by adopting processes such as
raw material three-stage crushing,
large particle medium-
magnetism and SLon strong-magnetismpre-selection, one-stage ore
grinding and grading, one-stage weak magnetic-selecting and one-stage SLon strong magnetic-selecting, pre-grading and two-stage ore
grinding and grading, two-stage weak magnetic-selecting and two-stage SLon strong magnetic-selecting and SL centrifugal
machine selecting operation for the
magnetic mirror iron ores. The efficient environment-friendly type
beneficiation method can throw 21% of coarse-particle barren rocks through high-pressure roller-
grinding, large-particle medium-
magnetism pre-selecting and SLon strong-
magnetism pre-selecting, and meets the beneficiation principle of preferably crushing instead of grinding and throwing as early as possible. A selecting process of roughing, cleaning and
scavenging of a centrifugal
machine is adopted, so that re-selecting operation completely replaces
reverse flotation operation, and therefore, the efficient environment-friendly type beneficiation method is a
pollution-free beneficiation method, is high
in degree of
automation, is great in
processing amount, is liable to realize field operation and implementation, and greatly reduces manual operation.