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Metal Mine ›› 2011, Vol. 40 ›› Issue (09): 116-119.

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Experiment of Reducing Roasting-magnetic Separation to a Refractory Oolitic Hematite in Hubei Province

Liu Ruohua,Sun Wei,Li Shanmei,Xu Longhua   

  1. School of Minerals Processing and Bioengineering,Central South University
  • Online:2011-09-13 Published:2011-09-19

Abstract: Briefly introduce the technological mineralogy of a refractory oolitic hematite in Hubei province.The experiment was reasearched on the ore of roasting temperature,dosage of reducing agent,roasting time and magnetic intensity.The result showed when the oolitic hematite of 47.57% iron grade was separated by reducing roasting with the roasting temperature of 850 ℃,dosage of 25% powdered carbon,roasting time of 60 min,grinding size of 65%-0.074 mm after quenching and magnetic intensity of 127.39 kA/m,the grade and recovery of iron concentration could reach to 56.75% and 79.96%,respectively.

Key words: Oolitic hematite, Magnetizing roasting, Magnetic separation