Experimental Study on the Preparation of Ultra-Pure Iron Concentrate From an Ordinary Magnetite in Hebei
The TFe grade of an ordinary magnetite in Hebei province is 65.25％,and the ore properties and structure are simple,which has the potential to prepare ultrapure iron concentrate.In this study,the process mineralogy of the raw ore was studied by multi-element and X-ray diffraction pattern,phase analysis and other methods,and the purification test was carried out on this basis.The results show that after the rough separation of the raw ore with a weak magnetic separation,the magnetic separation column concentrate with a TFe grade of 71.31％and the iron tailings with a TFe grade of 68.12％and a yield of 3.32％were obtained by weak magnetic separation and re-separation and magnetic separation column selection with a grinding fineness of-0.038 mm accounting for 85％.By further investigating the influence of the pharmaceutical system and technological process on the grading and recovery of iron ore concentrate,a suitable pharmaceutical system was determined.Then,the magnetic separation column concentrate was tested by 1 coarse and 3 fine reverse flotation silica reduction process,and finally the ultrapure iron concentrate containing TFe grade of 71.95％and the comprehensive recovery rate of 80.50％was obtained,and the TFe grade of flotation tailings was 68.17％,which met the standard of ordinary iron ore concentrate.Through the analysis of the chemical composition of the samples and the determination of the residual agent,it is further proved that the process can realize the preparation of ultrapure iron concentrate.Under the condition of a tail-throwing rate of 10.79％,73.04％of the raw ore sample is converted into ultra-pure iron concentrate,which has important guiding significance for the preparation of ultra-pure iron concentrate in this area,and also provides a certain reference value for the research on the preparation of ultra-pure iron concentrate from magnetite in other parts of China.
magnetitemagnetic separationreverse flotationmagnetic separation columnultra-pure iron concentrate
NETL
NSTL
万方数据
维普
