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Modern Mining ›› 2024, Vol. 40 ›› Issue (03): 152-155.

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Experimental Study on Improving Recovery Rate of an Iron Concentrate in Iran by Gravity Separation Method

In order to improve the recovery rate of iron concentrate in an iron ore from Iran，the experi⁃ mental study of magnetic separation process was carried out on the basis of the study of raw ore properties. The effects of different grinding fineness and magnetic separation intensity on iron grade and recovery rate were investigated，and the comprehensive recovery of tailings from magnetic separation was carried out.The results show that under the optimum conditions of grinding fineness of - 74 μm42% and magnetic field strength of 160 kA/m，iron concentrate with iron grade of 67.26% and iron recovery of 86.69% can be ob⁃ tained by one-stage grinding and two low intensity magnetic separation.The low intensity magnetic tailings are recovered by high intensity magnetic separation. Although the iron recovery rate is high，the iron grade is low. The iron concentrate with iron grade of 66.43% and iron recovery of 91.49% can be obtained by gravi⁃ ty separation of tailings by spiral chute. The recovery rate of iron concentrate is greatly improved by gravity separation of low intensity magnetic tailings.   

  1. 1. Inner Mongolia Autonomous Region Natural Resources Conservation and Utilization Research Center； 2. Xinjiang Academy of Environmental Protection Science；3. Xinjiang Key Laboratory for Environmental Pollution Monitoring and Risk Warning；4. Xinjiang Engineering Technology Research Center for Cleaner Production；5. Inner Mongolia Third Geology and Mineral Resources Exploration Development Co.，Ltd.； 6. Inner Mongolia Huachen Engineering Technology Co.，Ltd.
  • Online:2024-03-18 Published:2024-08-16

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Abstract: In order to improve the recovery rate of iron concentrate in an iron ore from Iran，the experi⁃ mental study of magnetic separation process was carried out on the basis of the study of raw ore properties. The effects of different grinding fineness and magnetic separation intensity on iron grade and recovery rate were investigated，and the comprehensive recovery of tailings from magnetic separation was carried out.The results show that under the optimum conditions of grinding fineness of - 74 μm42% and magnetic field strength of 160 kA/m，iron concentrate with iron grade of 67.26% and iron recovery of 86.69% can be ob⁃ tained by one-stage grinding and two low intensity magnetic separation.The low intensity magnetic tailings are recovered by high intensity magnetic separation. Although the iron recovery rate is high，the iron grade is low. The iron concentrate with iron grade of 66.43% and iron recovery of 91.49% can be obtained by gravi⁃ ty separation of tailings by spiral chute. The recovery rate of iron concentrate is greatly improved by gravity separation of low intensity magnetic tailings.

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