The composition of an iron ore is complicated,the distribution size is fine,and it is difficult to grind,so the be-neficiation experiment is carried out.The test results show that,For iron ore with 33.8%TFe grade,the concentrate prod-uct after one-preparation is grinding in two stages,the concentrate TFe grade is 61.6%,the fine mineral yield is 34.13%,the metal recovery is 62.13%,and the dressing ratio is 2.93.Further development of three-stage grinding,after grinding,the TFe grade of the concentrate is 64.32%,the fine mineral yield is 32.05%,the metal recovery is 60.92%,and the dressing ratio is 3.12.Compared with the two-stage grinding index,the concentrate TFe grade index exceeds the C63 grade require-ments,and the harmful impurity SiO2 content in the concentrate is reduced to less than 7%.
iron oremagnetic separationfine grainmineral processing experiments
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