Direct Reduction of High-phosphorus Oolitic Hematite Ore Based on Biomass Pyrolysis

2016 ◽  
Vol 23 (9) ◽  
pp. 874-883 ◽  
Author(s):  
Dong-bo Huang ◽  
Yan-bing Zong ◽  
Ru-fei Wei ◽  
Wei Gao ◽  
Xiao-ming Liu
Keyword(s):  
Direct Reduction ◽  
Biomass Pyrolysis ◽  
High Phosphorus ◽  
Hematite Ore ◽  
Oolitic Hematite Ore

Industry Test on Phosphorus Removal and Direct Reduction of High-Phosphorus Oolitic Hematite Ore

2011 ◽  
Vol 402 ◽  
pp. 535-541 ◽  
Author(s):  
Yong Li Li ◽  
Ti Chang Sun ◽  
Jue Kou ◽  
Cheng Yan Xu ◽  
Zhan Hua Liu ◽  
...  
Keyword(s):  
Metallic Iron ◽  
Phosphorus Removal ◽  
Phosphorus Content ◽  
Direct Reduction ◽  
Reduction Roasting ◽  
X Ray ◽  
High Phosphorus ◽  
Hematite Ore ◽  
Iron Grade ◽  
Oolitic Hematite Ore

Industry test on phosphorus removal and direct reduction of the “Ningxiang type” high-phosphorus oolitic hematite ore has been carried out in a tunnel kiln on the basis of laboratory experiment. The iron grade and phosphorus content of the initial sample are 42.46% and 0.867%, respectively. The results showed that high-phosphorus oolitic hematite could be exploited on industrial scale, with the new process direct reduction roasting – grinding – magnetic separation, and that the final concentrate with an iron grade 92.56%, iron recovery 82.77% and phosphorus content 0.089% was obtained under the optimal conditions. Besides, X-ray diffraction (XRD) and scanning electron microscope with X-ray energy dispersive spectrum (SEM-EDS) were used to analysis the mechanism of phosphorus removal and direct reduction. It was shown that oolitic structure was destroyed, and metallic iron particle coarsening was obvious, besides fluorapatite particles were dispersed in the gangue by diffusion during the reduction roasting process. The liberation of metallic iron and gangue can be achieved by grinding, so high iron grade and low phosphorus content concentrate can be obtained after magnetic separation.

Preparation of Iron Carbide from High Phosphorus Oolitic Hematite

2014 ◽  
Vol 881-883 ◽  
pp. 98-101
Author(s):  
Guang Qiang Li ◽  
Heng Hui Wang ◽  
Jian Yang ◽  
Jiang Hua Ma
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Iron Carbide ◽  
Xrd Analysis ◽  
Raw Material ◽  
Zonal Distribution ◽  
High Phosphorus ◽  
Hematite Ore ◽  
Oolitic Hematite Ore ◽  
Scanning Electron

In order to find a new way to utilize the high phosphorus oolitic hematite ore as raw material for steelmaking, the reduction and carburization of high phosphorus oolitic hematite by the gas of CH4-H2were studied. High phosphorus oolitic hematite, reduction and carburization products were investigated by the means of XRD and scanning electron microscope. The SEM-EDS and XRD analysis show that the main compositions of this ore are hematite and quartz, main microstructure is oolitic cluster with the zonal distribution of hematite and apatite, and iron carbide can be prepared from high phosphorus oolitic hematite.

Effects of Fuel on Gasification Dephosphorization of High-Phosphorus Oolitic Hematite Ore

2014 ◽  
Vol 881-883 ◽  
pp. 1536-1539 ◽  
Author(s):  
Fan Liu ◽  
Wei Zhang ◽  
Hong Wei Xing
Keyword(s):  
Carbon Content ◽  
Bituminous Coal ◽  
Sinter Process ◽  
Volatile Matter ◽  
Process Research ◽  
Coking Coal ◽  
High Phosphorus ◽  
Hematite Ore ◽  
Oolitic Hematite Ore

Through using jiuquan bituminous coal, yangquan anthracite, coking coal and charcoal as fuel,under 900 °C simulating the preheat layer of sinter process,research the influence of fuel types and content on gasification dephosphorization.Results show that due to the different volatile matter of coal, the influence on gasification dephosphorization is different, the influence of the highest volatile bituminous coal to the dephosphorization effect is best when carbon content takes 4%.

Sign in / Sign up

Export Citation Format

Share Document