scholarly journals Reaction Behavior of Phosphorus in Coal-Based Reduction of an Oolitic Hematite Ore and Pre-Dephosphorization of Reduced Iron

Metals ◽  
2016 ◽  
Vol 6 (4) ◽  
pp. 82 ◽  
Author(s):  
Peng Gao ◽  
Guo-Feng Li ◽  
Yue-Xin Han ◽  
Yong-Sheng Sun
Keyword(s):  
Reaction Behavior ◽  
Hematite Ore ◽  
Oolitic Hematite Ore

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.

Phase transformation in suspension roasting of oolitic hematite ore

2015 ◽  
Vol 22 (12) ◽  
pp. 4560-4565 ◽  
Author(s):  
Yan-jun Li ◽  
Ru Wang ◽  
Yue-xin Han ◽  
Xin-chao Wei
Keyword(s):  
Phase Transformation ◽  
Hematite Ore ◽  
Oolitic Hematite Ore

scholarly journals Distribution Characteristics of Phosphorus in the Metallic Iron during Solid-State Reductive Roasting of Oolitic Hematite Ore

2015 ◽  
Vol 55 (11) ◽  
pp. 2304-2309 ◽  
Author(s):  
Guanghui Li ◽  
Mingjun Rao ◽  
Chongzhong Ouyang ◽  
Shuhui Zhang ◽  
Zhiwei Peng ◽  
...  
Keyword(s):  
Solid State ◽  
Metallic Iron ◽  
Distribution Characteristics ◽  
Hematite Ore ◽  
Reductive Roasting ◽  
Oolitic Hematite Ore

Improved Flotation of Oolitic Hematite Ore Based on a Novel Cationic Collector

2013 ◽  
Vol 712-715 ◽  
pp. 743-747
Author(s):  
Zhi Qiang Rao ◽  
Yu Shu Zhang ◽  
Yong Chao Jin
Keyword(s):  
Fine Particles ◽  
Separation Efficiency ◽  
Ring Structure ◽  
Reverse Flotation ◽  
Silicate Minerals ◽  
Iron Minerals ◽  
Mineral Compositions ◽  
Hematite Ore ◽  
Cationic Collector ◽  
Oolitic Hematite Ore

Oolitic hematite is one of the most refractory iron ores with complicate mineral compositions and abundant reserves in China. The hematite and limonite in the ore integrate closely with fine particles of collophanite, quartz, chamosite, calcite and chalcedony to form concentric ring structure, making the separation of the minerals extremely difficult. Since the tiny hematite crystal can not be liberated during the grinding of the ore the beneficiation can only be accomplished by recovering iron minerals aggregate with hematite as the major component. The previous research results showed that reverse flotation with fatty acid collectors could remove liberated phosphate minerals but not the quartz, chlorite and silicate minerals. This was because the gangue minerals such as quartz were contaminated by iron on the surface and there were high content of iron in some silicate minerals and high content of silicon in iron minerals, causing the floatability difference between the silicon and the iron minerals very small and thus the separation efficiency very low. Experiments were conducted to beneficiate the ore by reverse flotation with different cationic collectors. The results indicated that the flotation separation efficiency with most cationic collectors such as dodecylamine, ether amine, GE601 or GE609 was not satisfactory. However, a novel cationic collector for silicon removal, EM506 was found to be specifically selective to separate the gangue minerals from the iron ore with an increase of TFe grade from 49% to more than 58% and a recovery of TFe greater than 96%, which provided a promising approach for the beneficiation of the refractory oolitic hematite ore.

scholarly journals Dephosphorization behavior of reduced iron and the properties of high-P-containing slag

2021 ◽  
Vol 40 (1) ◽  
pp. 337-344
Author(s):  
Liwei Liu ◽  
Guofeng Li ◽  
Yanfeng Li ◽  
Libing Zhao
Keyword(s):  
Phase Composition ◽  
Phosphate Fertilizer ◽  
Diffraction Peak ◽  
Comprehensive Utilization ◽  
High Basicity ◽  
P Content ◽  
Initial Slag ◽  
Hematite Ore ◽  
Free Cao ◽  
Oolitic Hematite Ore

Abstract Reduced iron (1.74% P) is produced from oolitic hematite ore by coal-based reduction and magnetic separation. To realize the comprehensive utilization of Fe and P, the dephosphorization behavior of the reduced iron is investigated in the presence of CaO–SiO2–FeO–Al2O3 slag. The P content of the final iron and the P2O5 content of the high-P-containing slag are determined, and the phase composition and P2O5 solubility of the slag are analyzed. The P content can be decreased to 0.2% when the initial slag has a basicity of 3.5 and contains 55% FeO and 6% Al2O3. The phases of the high-P-containing slag are mainly Ca2Al2SiO7, Ca2SiO4, Ca5(PO4)2SiO4, and FeO, and P exists in the form of Ca5(PO4)2SiO4. Excessively high basicity or low content of FeO and Al2O3 results in free CaO, which affects the dephosphorization results. The change rule of the intensity of the Ca5(PO4)2SiO4 diffraction peak agrees well with the dephosphorization indexes, which further verify the accuracy of the dephosphorization experiments. Moreover, the P2O5 content and P2O5 solubility of the high-P-containing slag reached as high as 14.41 and 94.54%, respectively, indicating that it can be used as a phosphate fertilizer.

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

Test Research on HIMS-Reverse Flotation of Oolitic Hematite of Longyan Iron Mine

2013 ◽  
Vol 753-755 ◽  
pp. 24-27 ◽  
Author(s):  
Shu Xian Liu ◽  
Jin Xia Zhang ◽  
Miao Chen ◽  
Zhi Shuai Xu
Keyword(s):  
Magnetic Separation ◽  
Reverse Flotation ◽  
Test Results ◽  
Flotation Reagents ◽  
High Gradient Magnetic Separation ◽  
Iron Concentrate ◽  
Iron Mine ◽  
Hematite Ore ◽  
Reverse Floatation ◽  
Oolitic Hematite Ore

In order to better exploit and utilize the oolitic hematite ore resource in Zhangjiakou region, staged grinding-separation process consisting of high intensity magnetic separation(HIMS) and reverse floatation was adopted in the beneficiation test on the regionally representative oolitic hematite ore of Longyan Iron Mine, Xuan Stee1. The test results indicate that，with Slong pulsating high gradient magnetic separation as HIMS equipment，with NaOH，starch，CaO and TS as flotation reagents，and at a grind of 65％ -200 mesh for the primary grinding and 95％-200 mesh for the secondary grinding，an iron concentrate grading 62.34％ and having an iron recovery of 53.07％ can be achieved after two stage HIMS and one roughing—one cleaning reverse flotation.

Research on Classified Magnetic Separation of Oolitic Hematite from Guizhou Province

2013 ◽  
Vol 634-638 ◽  
pp. 3433-3436
Author(s):  
Wen Hui Chen ◽  
Qin Zhang ◽  
Zhi Hui Shen ◽  
Mao Jiang
Keyword(s):  
Magnetic Separation ◽  
Size Fraction ◽  
Guizhou Province ◽  
Iron Recovery ◽  
Low Intensity ◽  
The World ◽  
Refractory Ores ◽  
Hematite Ore ◽  
Oolitic Hematite Ore

Oolitic hematite is considered to be one of the most refractory ores in the world due to its ultra fine disseminated grain size and complex mineral composition. Various magnetic separation methods were conducted on the oolitic hematite ore samples from Guizhou Province. Because the TFe grades of each size fraction of the grinding products were different from each other, the beneficiation process of “classification – low intensity magnetic separation – high intensity magnetic separation” was finally adopted to guarantee the quality of iron concentrates. After the determined magnetic separation, the relatively good technical indexes are obtained. The TFe grade of iron concentrates is increased from 38.7% to 46.1%, and the iron recovery is 81.7%.

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