Excellent graduate degree dissertation topics show The Research of Strong Magnetic(Flocculation)-reverse Foltation Technology and Floccculation Properties of Oolitic Hematite Author: ZuoZuoTian Tutor: LuoLiQun School: Wuhan University of Technology Course: Mineral Processing Engineering
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X-ray diffraction, X-ray photoelectron spectroscopy, and transmission electron microscopy analyses indicated that the iron mineral phase was selectively transformed from weakly
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The oolitic hematite ore, belonging to the refractory iron oxide ores, has not been utilized logically because of the characteristics of oolitic and reniform structures, fine distribution
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To enhance effective use of resources, we use magnetic separation method on the experiment study of a refractory oolitic hematite ore. Research showed that: the grade of raw ore (TFe) was 47.44%, and magnetic iron grade (MFe) was 28.59%. Through magnetic separation experiment, three-step magnetic separation process was chosen.
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The oolitic hematite is abundant in our country and its prospective reserve is more than ten billion ton which accounts for1/9of the total iron ore resourees. However, this kind of iron ore resource around the world has not been widely exploited for its fine particle distribution, complicated structure, complex compostion and a high P content.
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· In this study, a clean utilisation of refractory high-P oolitic hematite via phase reconstruction was proposed to make the P for crop fertiliser and Fe for ferrite ceramic. Phase reconstruction indicated that the oolitic and finely disseminated structure was dramatically changed by the oxidisation roasting with Mn ore at 1100°C–1250 °C.
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· In this article, mineralogical phase changes and structural changes of iron oxides and phosphorus-bearing minerals during the direct reduction roasting process were investigated by X-ray diffraction (XRD) and scanning electron microscope (SEM). It has been found that the reduction of hematite follows the following general pathway: Fe2O3
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· In this study, the oolitic hematite–coal composite briquettes were conducted by coal-based reduction at various reduction temperatures, reduction times, and ore size fractions. The degree of metallization, microstructure, and particle size characteristics were investigated to further reveal the growth behavior and size
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· Oolitic hematite is an iron ore resource with complex refractory characteristics, abundant reserves, and significant recycling value. In this study, a clean and innovative microwave fluidization roasting method was developed. Iron concentrate with an iron grade of 58.72
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· Oolitic hematite is an important iron ore resource in China. The mixed powder of the Guizhou oolitic hematite, the graphite, and the calcium hydroxide was pressed in a cylindrical sample mold by a 16 Mpa pressure. The dried samples at 378K for 12h were reduced in a muffle furnace at the temperature between 1323K and 1473K.
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· To obtain the feed particle size required for the high-temperature pretreatment experiments, ore samples were prepared by two-stage crushing using a jaw crusher (XPC-100 × 150) and roller crusher (XPSF-Φ400 × 250), followed by grinding in a rod mill (XMB-70 II).
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DOI: 10.1002/9781118663448.CH13 Corpus ID: 94616884 Study on Magnetic Roasting Kinetic of Oolitic Hematite @inproceedings{Guo2013StudyOM, title={Study on Magnetic Roasting Kinetic of Oolitic Hematite}, author={Yu-Feng Guo and Linjiang Qing and Tao
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· Magnetizing roasting of oolitic hematite ore from western Hubei Province was investigated. The mechanism for reduction roasting of oolitic hematite ore was discussed and analyzed. It is found that flash magnetizing roasting-magnetic separation process is a promising approach for the processing of oolitic hematite ore from western
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· Oolites are sedimentary rocks formed from ooids which are spherical grains composed of concentric layers. The name derives from the ancient Greek word for “egg”. Oolites consist of ooids of diameters between 0.25 and 2 mm; rocks composed of ooids larger than 2 mm are called pisolites. Together these clasts are referred to as pelletoids.
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Research on efficient utilization of high-phosphorus oolitic hematite for iron enrichment and dephosphorization by hydrogen mineral phase transformation DING Hao-yuan()1, 2, YUAN Shuai()1 ,2 3*, GAO Peng()1, 2, ZHANG Hong-hao()1, 2, WANG Ruo-feng()1, 2, LEI Shun-lin()1, 2
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· The chemical compositions, mineralogical characteristics, as well as dissemination of iron- and phosphorus-based minerals were studied for the E’xi oolitic hematite from western Hubei Province in China by using chemical analysis, optical microscope, electron probe micro-analyzer (EPMA) and energy dispersive spectroscopy
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The chemical composition,mineral composition,dissemination characteristics and ooidal characterization of the oolitic hematite ore were detailedly investigated through optical microscope,electron probe,XRD,MLA automatic detection and chemical analysis.The results showed that iron mainly occurs in the form of hematite and limonite,and the primary
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· 1. Introduction The Ningxiang type oolitic hematite, which is widely distributed in Hubei, Hunan, Sichuan, Guizhou and other regions, is one of the largest reserves of sedimentary iron ore in China. The iron ore reserves of 3.72 billion tons, account for approximately 73.5% of the sedimentary iron ore in China (Lu et al., 1994).
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· This study aims to provide theoretical and technical basis for economical and rational use of high phosphorus oolitic hematite. Following physical, chemical and microscopic characterisation of high phosphorus oolitic hematite ore the feasibility of separation of phosphorus and metallic iron by reduction roasting and magnetic
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The high alumina oolitic hematite belong to refractory iron, it is difficult to achieve Al-Feeffective separation by conventional beneficiation process. On the basis of physicochemicalproperties and mineralogy characters are studied, through depth reduction-dry magneticseparation process deal with high alumina oolitic hematite of Guizhou
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Abstract: Oolitic hematite possesses the characteristics of large resource reserves, low iron grade, fine embedded particle size and complex mineral composition, which is
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· Flotation research reveals that the laboratory-produced fatty acid serves as an effective collector for high-phosphorus oolitic hematite. A favorable result was achieved, with an iron content of 57.67%, phosphorus content of 0.14% and a flotation recovery of 82.43%.
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: Yongli Li, Tichang Sun, Jue Kou, Qian Guo, Chengyan XuOolitic hematite, as a complex and refractory iron ore resource, can be efficiently utilized by magnetic roasting. In this study, to ascertain the mechanism of microwave fluidization
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Therefore, the separation of phosphorus-bearing gangue and metallic iron can be achieved by wet grinding and magnetic separation, and low phosphorus content metallic iron powder can be obtained. However, when the temperature reached 1250°C and beyond, some of the fluorapatite was reduced to elemental P and diffused into the metallic iron phase, making
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· Oolitic hematite, as a complex and refractory iron ore resource, can be efficiently utilized by magnetic roasting. In this study, to ascertain the mechanism of microwave fluidization roasting
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Natural high-quality iron can be directly applied to pyro-metallurgy process, however, the availability of these ores has become less and less due to exploitation. This research reports a systematic approach using reduction roasting and magnetic separation for oolitic iron ores from west Hubei Province. Firstly, a mineralogical study was performed and it was
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· Magnetizing Roasting Mechanism and Effective Ore Dressing Process for Oolitic Hematite Ore. April 2011. Journal of Wuhan University of Technology-Mater Sci Ed 26 (2):176-181. DOI: 10.1007/s11595
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oolitic hematite. Previous studies by our research groups have proved that the iron carbide can be prepared from high phos-phorous oolitic hematite in the atmosphere of H 2/CH 4. 20–22 So, the methane decomposition can both affect the iron carbide
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Study on Phosphorus Removal of High-Phosphorus Oolitic Hematite by Coal-Based Direct Reduction and Magnetic Separation. Yongli Li. , Tichang Sun. , Jue Kou. , Qian
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· A process with coal-based direct reduction followed by magnetic separation is presented for recovering metallic iron from high-phosphorus oolitic hematite in this study. Ca(OH)2 and Na2CO3 were
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