Abstract:

In order to improve the efficiency of mineral processing in green mines of Nanfen Iron Mine

and make efficient use of Beishan raw ore, based on the study of process mineralogy, the beneficiation pro⁃

cess test of Beishan ore is carried out. The results show that the tailings with total yield of 23.26% can be re⁃

moved in advance by dry-polishing and wet-polishing with the process of dry-polishing before roller mill⁃

high pressure roller mill-wet-polishing of roller mill products-stage grinding-low intensity magnetic separa⁃

tion, which greatly reduces the amount of subsequent grinding and improves the iron grade of the grinding

sample. The final yield of iron concentrate is 30.77%, the content of TFe and mFe is 68.17% and 60.22% re⁃

spectively,and the recovery rate of TFe and mFe is 66.63% and 98.16% respectively.

Key words:

magnetite,high pressure roller mill, stage grinding,low intensity magnetic separation