Adaptability Test of Auxiliary Ore Body Ore to Main Ore Body Ore Separation Process in an Iron Mine
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.
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