The Chinese Iron Ore Deposits and Ore Production | IntechOpen
In China, iron ore with hematite grain size of less than 0.045 mm or magnetite grain size of less than 0.03 mm is commonly referred to as fine-grained iron ore . Yuanjiacun Iron deposit and Qidong Iron deposit in Shanxi and Hunan Province, respectively, are the most typical fine grain iron deposits in China. ... Application of SA-2 Flocculant ...Web
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Enhance the carbothermic reduction of high phosphorus oolitic hematite
The reduction of high phosphorus oolitic hematite, especially for the accumulation and growth of iron played an important role in subsequent magnetic separation, the influence of borax on which was studied. It was indicated that the mass loss percent was up to 31.11% and the metallization ratio was up to 90.10% when the …Web
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Hematite Processing Plant, Hematite Separator Machine, …
Hematite separation process is suitable for complex structure hematite such as hematite and impurities with uneven distribution of particle size, ore with large content of fine …Web
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A New Route to Upgrading the High-Phosphorus Oolitic Hematite …
In this paper, an innovative method is proposed to upgrade iron and remove phosphorus from high-phosphorus oolitic hematite ore by the sodium magnetization roasting–magnetic separation–sulfuric acid and sodium hydroxide leaching process. The process parameters of sodium magnetization roasting, acid leaching, and alkaline …Web
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Comprehensive Extraction of Silica and Alumina from High
Hematite and HACG were well mixed with Fe 2 O 3 /Al 2 O 3 molar ratio of 1.2:2.0 in a vibration mill (GJ-1, Jiangxi Longzhong Mechanical Equipment Co., Ltd, China) for 2 min. Then, the mixture of hematite and HACG was reductively roasted in a muffle furnace (SX2-8–16, Changsha Dianlu Co., Ltd, China) at 1100 °C for 60 min to obtain the ...Web
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Efficient recovery of iron and chromium from laterite residue by …
In China, most iron ores are low grade ... In NAPL residue, the iron content ranges from 53.12 wt% to 59.20 wt% in the form of hematite, which is considered as the primary input for iron making. The other elements contain Cr, Al, Si and Mg. ... This paper proposed non-molten metallization reduction-magnetic separation technology to solve …Web
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Behavior of Fe and P during reduction magnetic roasting-separation …
ABSTRACT Fe–P separation and the behaviors of Fe and P in separation process of high-phosphorus oolitic hematite ore from western Hubei province in China were studied. Various parameters, including reducing temperature and time, dosage of the pulverized coal, grinding fineness of magnetic separation feed, magnetic field intensity …Web
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An innovative technology for utilization of oolitic hematite via
Published: 27 April 2023 An innovative technology for utilization of oolitic hematite via microwave fluidization pretreatment: Separation characteristics and mechanism …Web
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Ultrathin Hematite Photoanode with Gradient Ti Doping
Herein, we synthesized ultrathin hematite photoanode via a layer-by-layer polymer-assisted deposition (PAD) method. Each layer of hematite is around 30 nm in thickness with different Ti-doping level, as shown in Figure 1.The built-in electric field, due to the gradient Ti concentration to distribute the band bending over the bulk of the hematite …Web
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Preparation of high-purity SiO
HCl, H 2 SO 4, and HF were obtained from Aladdin Co. Ltd., Beijing, China. The experimental reagents used were of analytical grade. Tap water was used in the S …Web
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Superconducting Magnetic Separation | SpringerLink
Superconducting magnetic separation is a method of mineral separation by a magnetic separator with superconductor as a magnetic system. Its application is mainly with the aid of a superconducting magnetic separator equipment. Following the birth of the first superconducting magnet in 1961, J.D. Bannister of the United States invented the …Web
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High-purity recycling of hematite and Zn/Cu mixture from waste …
Xue Lin, Yaqiong Wu, Zhan Qu, Ting Su & Xinfeng Xie Scientific Reports 10, Article number: 9031 ( 2020 ) Cite this article 1252 Accesses 5 Citations Metrics Abstract In this study, Zn/Cu-bearing...Web
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Preparation, properties, and applications of magnetic hematite
This charge separation can then be used to catalyze redox reactions on the particles' surface, in a process commonly called heterogeneous photocatalysis. While there is still some debate about it, the most commonly accepted bandgap value for hematite is of the order of 1.9–2.2 eV 92,93 depending on the synthesis method. Because of this narrow ...Web
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Study on Microstructure Evolution of Oolitic Hematite during …
Simultaneously, China's scientific researchers have carried out extensive research work on the efficient utilization of oolitic hematite ore and made important progress. The research methods can be divided into physical beneficiation processes, leaching processes, direct reduction magnetic separation processes, and magnetization …Web
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Application of multi-stage dynamic magnetizing roasting
In another study [61], magnetizing roasting with low-intensity magnetic separation and anionic reverse flotation was applied to treat high-phosphorus oolitic hematite from western Hubei Province, China. The yield, TFe and recovery rates were 56.20%, 61.88%, and 79.2%, respectively.Web
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Investigation of nanobubble enhanced reverse anionic flotation of
In China, hematite flotation is often preceded by magnetic separation that upgrades run-of-mine hematite ore from about 30% Fe to around 45% Fe [12,13]. Although the magnetic separation can remove some of the slimes, its de-sliming effect is not adequate and the reverse cationic flotation performance is often poor [14].Web
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The hematite ore liberation and separation properties …
The hematite ore liberation and separation properties in different comminution way. In order to improve grinding efficiency and weaken over-grinding in the whole grinding process, the new process of "ultra …Web
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Mechanism of phosphorus removal in beneficiation of
High phosphorous oolitic hematite ore is one of typical intractable iron ores in China, and the conventional beneficiation methods are found to be impracticable to remove phosphorus from the ore effectively. ... were gotten by direct reduction roasting with dephosphorization agent followed by two stages of grinding and magnetic separation. …Web
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Thermal decomposition and oxidation of pyrite with different
The hematite in samples WP-1 and ATB-Py was massive (Fig. 8a, e); however, the enlarged surface was scaled with numerous holes (Fig. 8b, f). The hematite aggregates in the ATB-1 and DLT-Py samples retained the original pentagonal dodecahedron (Fig. 8c, d) and octahedral crystal pseudomorph of pyrite (Fig. 8g, h). The …Web
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A Review on Removal of Iron Impurities from Quartz Mineral
The magnetic separation process can remove weakly magnetic impurities such as hematite and limonite, including intergrowth particles, to the maximum extent . Cui et al. [ 25 ] conducted a magnetic separation purification experiment on a …Web
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An alternative and clean utilisation of refractory high-phosphorus
Separation behavior of P and Fe from high-P oolitic hematite is studied. • Separated products can be as ingredients for ceramics and fertiliser production. • All the …Web
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Effect and mechanism of siderite on reverse flotation of hematite
The effects of siderite on reverse flotation of hematite were investigated using micro flotation, adsorption tests, and Fourier transform infrared spectroscopy. The flotation results show that interactions between siderite and quartz are the main reasons that siderite significantly influences the floatability. The interactions are attributed to dissolved …Web
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Separation of Iron and Rare Earths from Low‐Intensity Magnetic
The XRD patterns of magnetic separation concentrate show that the main mineral phases in concentrate are magnetite (Fe 3 O 4) and fluorite (CaF 2), which can be removed by grinding and reverse flotation fluorite to obtain a high-grade iron concentrate. The REO grade of magnetic separation tailings is 11.98 %, and its recovery rate is 97.96 …Web
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1,2,*, Yonghong Qin 1,2, Yuexin Han 1,2 and Yanjun Li 1,2
hematite is reduced to magnetite and easily recovered by low-intensity magnetic separation [26,27]. Currently, with the development of magnetization roasting technol-ogy and associated industrial equipment, suspension magnetization roasting technology has become a promising method for processing low-grade hematite ore …Web
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Separation mechanism and experimental investigation of …
Since the 21st century, the iron and steel industry has developed rapidly in China, and China has become the largest importer of iron ore [1], [2], [3]. Therefore, the mineral separation efficiency is the main topic in industrial production. ... grinding fineness, magnetic induction on the separation efficiency, the hematite separation ...Web
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Sustainability | Free Full-Text | Fluidization Roasting Technology …
This study presents a fluidization roasting technology for siderite-bearing iron ore without the use of carbon additives. Samples of Jingtieshan iron ore were subjected to fluidization magnetization roasting, and the effects of roasting temperature, time, and N2 flow rate on the magnetic separation performance were explored. An iron concentrate with …Web
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Investigations on the Reverse Flotation of Quartz/Hematite Using …
The traditional hematite depressant starch has the disadvantages of poor solubility and high viscosity. In this study, a novel hematite depressant, pullulan, with better performance and flotation effect than starch was found. The structure, molecular weight and viscosity of pullulan were determined for its characterization. The results of flotation tests …Web
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and Quartz Mixture Minerals Based on a Cyclone
Separation Process for Hematite and ... and hematite [13–15]. In the early 1960s, China suc-cessfully developed the Yunxi-type centrifugal concentrator, which can selectively enrichWeb
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Reverse flotation separation of hematite from quartz assisted with
The purities of hematite, quartz, and magnetite were 97.3%, 99.4%, and 93.8%, respectively. Elemental compositions of minerals are shown in Table 1.Total iron and ferrous iron contents were determined with the standard titrimetric method using potassium dichromate as titrant after reduction of the iron (III) by tin (II) chloride and/or titanium (III) …Web
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Jin YAO | PhD | Northeastern University (Shenyang, China), …
Siderite-bearing hematite is a type of refractory iron ore, where fine particle aggregation or dispersion behavior is of importance for the separation efficiency.Web
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