Abstract：Effects of serpentine on green pellet quality, compression strength and metallurgical properties of pellet produced by magnetite and hematite iron ore concentrate are studied. The results show that, green pellet quality of both magnetite and hematite pellet is improved by addition of serpentine. The compression strength of preheated pellet decreases after adding serpentine , further the compression strength of hematite preheated pellet is lower than that of magnetite preheated pellet 50- 100 N/P under the same preheating temperature and serpentine ratio. While firing temperature is below 1280 ℃, the compression strength of both magnetite and hematite pellet decreases with the increase of serpentine ratio. However the compression strength of pellet with serpentine is higher than pellet without serpentine when firing under 1300 ℃. Serpentine will cause the decrease of reduction swelling index for magnetite and hematite pellet, and the reduction index is relatively higher when serpentine ratio is 1.5%.
2015, Vol. 25 
