Abstract:

I # ore body of an iron mine in Anhui is the main ore body，which belongs to quartz type

magnetite ore with iron grade of 22.96%.II# and III# ore bodies are silicate-type magnetite with a small

amount of specularite，with an iron grade of 26.99%. The main gangue component in the ore is SiO2. The

iron in the form of magnetite in quartz-type magnetite ore accounts for 68.34% of the total iron，and the

iron in the form of magnetite in silicate-type magnetite ore accounts for 45.69% of the total iron. In order

to reduce the impact of II# and III# ore bodies ore selection on the existing process，the quartz-type magne⁃

tite ore and silicate-type magnetite ore were mixed at a mass ratio of 2∶1 and 5∶1，respectively，and then

treated by one stage grinding one stage one roughing one cleaning low intensity magnetic separation-two

stage grinding two stage one roughing one cleaning low intensity magnetic separation-elutriation machine

cleaning selection process. When the grinding fineness of the one and two stages is -0.075 mm accounting

for 45% and 90% respectively，and the magnetic field strength of low intensity magnetic separation rough⁃

ing and cleaning is 159.24 kA/m and 119.43 kA/m respectively，the corresponding three high-quality iron

concentrates have iron grade of 70.06% and iron recovery of 65.95%，iron grade of 69.89% and iron recov⁃

ery of 62.17%，iron grade of 69.74% and iron recovery of 58.08%. It shows that the on-site process has a

good adaptability to the ore selection of II# and III# ore bodies.

Key words:

quartz-type magnetite ore, silicate-type magnetite ore, ore blending selection