Welcome to Metal Mine! Today is Share:
×

扫码分享

Metal Mine ›› 2015, Vol. 44 ›› Issue (10): 67-70.

Previous Articles     Next Articles

Research on Recovery of Iron from Blast Furnace Dust and High Phosphorus Oolitic Hematite by Coreduction Roasting

Cao Yunye1,2,Sun Tichang1,2,Kou Jue1,2,Gao Enxia1,2,Xu Chengyan1,2   

  1. 1.School of Civil and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China;2.Key Laboratory of High-efficient Mining and Safety of Metal Mines,Ministry of Education,Beijing 100083,China
  • Online:2015-10-15 Published:2015-11-20

Abstract: In order to find the possibility of blast furnace dust as reducing agent in high phosphorus oolitic hematite reduction roasting,coreduction roasting experiments were conducted on a oolitic hematite ore with 42.72% iron from Western Hubei and a blast furnace dust with 23.96% iron,32.83% fixed carbon as raw material.Results show that with the conditions of the blast furnace dust dosage of 30%,coreduction roasting temperature of 1 150 ℃,roasting time of 60 min,grinding fineness for reduction product is 96% - 0.043 mm,magnetic field intensity is 87.58 kA/m,DRI with 91.88% iron,0.072% phosphorus and iron grade of 88.38% was obtained.XRD analysis results on different dosage of blast furnace dust calcined product show that with the increase dosage of the blast furnace dust,iron diffraction peak strengthen gradually.Increase the dosage of blast turance is beneficial for iron bearing minerals reduction to metallic iron,while phosphorus in DRI also increased.Blast furnace dust as a reducing agent for high phosphorus oolitic hematite reduction roasting,provides a new method in efficient utilization of blast furnace dust and refractory iron ore,and can reduce the cost of oolitic hematite direct reduction roasting,at the same time reduce the blast furnace dust pollution to the environment,has high economic and environmental benefits.

Key words: Blast furnace dust, High phosphorus oolitic hematite, Coreduction roasting