This mathematical evaluation focuses on iron ore ultra-fines for their use in a novel hydrogen-based fluidized bed direct reduction process. The benefits of such a process include reduced CO 2 emissions and energy consumption per ton of product, lower operational and capital expenditure, and a higher oxide yield. Typical samples of iron …

DOI: 10.1016/j.powtec.2024.119624 Corpus ID: 265043639; Direct reduction of iron-ore with hydrogen in fluidized beds: A coarse-grained CFD-DEM-IBM study @article{Lan2023DirectRO, title={Direct reduction of iron-ore with hydrogen in fluidized beds: A coarse-grained CFD-DEM-IBM study}, author={Bin Lan and Ji Hui Xu and Shuai …

To solve the problem of processing of refractory iron oxide ore resulted from its fine-grained disseminated structure, in this paper, an improved technology was innovatively proposed, which consisted of three stages of reduction roasting-acid leaching followed by magnetic separation, and CaCO 3 was introduced during roasting process. …

The global market has announced copper as a modern energy metal and finds its extensive utilization in the construction industry, electrical wiring, power transmission lines, alloying, anticorrosive coating, heat exchangers, refrigeration tubing, etc. Copper ore is primarily beneficiated from sulphide mineral deposits. Due to high-grade …

An east–west-trending medium-grained mafic sill containing co-genetic Fe–Ti oxide ore lenses is found disposed within granite gneisses around Saltora-Mejia area in the eastern part of the Chotanagpur Granite Gneissic Complex (CGGC) of eastern India. CGGC is considered as a Proterozoic mobile belt as it witnessed multiple phases of ...

In this study, a coarse-grained CFD-DEM-IBM solver based on hybrid CPU–GPU computing is developed to simulate the direct reduction process of two kinds of iron ore with hydrogen in fluidized beds, where the developed unreacted shrinking core model is used to model the reduction reactions, a coarse-grained model and multiple …

Three Fe–Ti oxide-bearing layered intrusions (Mazaertag, Wajilitag, and Piqiang) in the Tarim large igneous province (NW China) have been investigated for understanding the relationship of sulfide saturation, Platinum-group element (PGE) …

Magnetite in the outcropping body is coarse-grained (Magnetite-S, >500 µm size) ... Immiscible hydrous Fe–Ca–P melt and the origin of iron oxide-apatite ore deposits.

fine-grained copper oxide ore has an important role in meeting the market's growing demand for copper, and it is also significant for the conservation of mineral resources. The Dishui Copper Processing Plant is located in Qarqi Town (Aksu Prefecture, Xinjiang Province, China). The mining area is about 21 square kilometers, with the copper ...

2.2. Procedures and analysis2.2.1. As-and Sb-oxidation reaction mechanism analysis. Owing to Au-extraction efficiency mainly based on the oxidative decomposition of As-and Sb-minerals and the Mn-oxide ore affected the lattice failure of sulphide minerals, hence, it focused on the As-and Sb-dissolution by the Mn-oxide pre-oxidation for the …

Cite. https://doi/10.1016/j.powtec.2019.08.020Get rights and content. Highlights. •. A novel technology was proposed for Fe separation from fine-grained iron oxide ore. •. Iron particles were magnetized by alkali lignin at 200 °C by microwave …

Iron oxides ore is the most abundantly available resource compared to sulfide and carbonate. 1 The majority of iron ore reserves in China are low-grade, finally disseminated, and scattered reserves. 2 The estimated national reserves are more than …

Iron ore tailing is a major solid waste requiring advanced recycling methods because ore tailing powder is polluting air and water resources. For instance, about 300 million tons of tailings are disposed yearly in 1229 iron ore tailings dams in the Hebei province in China. Iron ore tailings can be recycled as functional materials because these tailings are …

Hematite is the oldest known iron oxide mineral. Formula Fe2O3. it is the most important ore of iron because of its high iron content and its abundance. ... due to its reddish color when it is powdered or in a …

valuable minerals such as iron oxide, remains in the slurry and is collected as a concentrate/product. In the iron industry, the reverse flotation of iron ore has been successfully employed for more than 20 years.9 The iron ore at the Donganshan processing plant contains mainly magnetite and hematite fine-grained particles, which are easy to ...

1. Introduction. Magnetite and ilmenite are two common minerals in igneous, metamorphic and sedimentary rocks. In particular, they are major ore minerals in many hydrothermal iron deposits, banded iron formation, and magmatic Fe–Ti–V and Fe–Ti–P ore deposits (Dupuis and Beaudoin, 2011, Dare et al., 2014, Nadoll et al., …

hematite, heavy and relatively hard oxide mineral, ferric oxide (Fe 2 O 3), that constitutes the most important iron ore because of its high iron content (70 percent) and its abundance. Its name is derived from the Greek word for "blood," in allusion to its red colour. Many of the various forms of hematite have separate names. The steel-gray crystals and coarse …

The raw ore used in the test was cobalt oxide ore from Africa. The chemical composition analysis and mineral composition of the ore are shown in Table 1, Table 2, respectively. Table 1 shows that the content of Co in cobalt oxide ore is 0.78 % with 4.46 % TFe as an associated important metal component. As seen from Table 2, the main cobalt …

The electric separation method has a good effect in processing fine-grained minerals, and is especially suitable for the beneficiation of copper oxide ores. 2. Chemical beneficiation method:

The reserve of the copper-oxide-bearing limonite ore (COBL ore) in Yulong Copper Co., Ltd. is up to 20 million tons with 1.79% of copper content. The characters of the copper resources in the COBL ore are high-proportioned oxidation state (99.98%) and combined state (84.83%). The combined copper oxide is mainly copper-oxide-bearing …

fine-grained copper oxide ore has an important role in meeting the market's growing demand for copper, and it is also significant for the conservation of mineral resources. The Dishui Copper Processing Plant is located in Qarqi Town (Aksu Prefecture, Xinjiang Province, China). The mining area is about 21 square kilometers, …

Fine grained iron ore is pressed into two pockets with the addition of water or some other binder agent (molasses, starch, or tar pitch) to form briquettes . ... we used iron oxide (III) mixed with carbon, and a 1.5 kW medium size vertical axis solar furnace at the laboratory PROMES-CNRS (Font Romeu-Odeillo-Via, France).

In this study, a coarse-grained CFD-DEM-IBM solver based on hybrid CPU-GPU computing is developed to simulate the direct reduction process of two kinds of iron ore with hydrogen in fluidized beds ...

Zhixiang Chen. University of Alberta. Yanhong Wang. Show all 5 authors. Abstract and Figures. A new method, staged flotation for effectively increasing the recovery of ultra-fine copper oxide...

Lense-like or layered Fe–Ti oxide ore body extends for about 1.7 km long and 0.2–0.3 km wide and is mainly hosted in the fine-grained clinopyroxenite (Fig. 2b, c). The contact of the Fe–Ti oxide ore body and the host rock is transitional. The intrusion is overlain by syenitic plutons (Zhang et al. 2008a).

the Lagrangian Discrete Phase Model (DPM) and a coarse-grained TFM such as in the works of Schneider et al. (2016). 2. Reaction Kinetics A general type of non-catalytic reaction may be ...

The FeTi ore mineralization of the Dar Gaz district is hosted within the central part of the Kahnouj complex, consisting of coarse-grained gabbro (152.7 ± 5.1 Ma), fine-grained pyroxene ...

fine-grained copper oxide ore has an important role in meeting the market's growing demand for copper, and it is also significant for the conservation of mineral resources. The Dishui Copper Processing Plant is located in Qarqi Town (Aksu …

A new method, staged flotation for effectively increasing the recovery of ultra-fine copper oxide ore with a new type of collector (ZH-1, C3-5 carbon chain xanthate) is proposed for the first time. The flotation process and mechanism were examined by …

After adding the selective flocculant, the fine-grained oxide lead-zinc minerals are agglomerated into larger-grained minerals, which improves the buoyancy and realizes the separation of fine ...

To explore the flotation feasibility and flotation law of iron minerals from amphibole-type iron oxide ore with full-size minerals, a systematic study on the flotation behaviors of single minerals hematite, quartz, and amphibole was carried out with the anionic reverse flotation system. The effects of collectors, depressants, activators, and …

3.3. Coarse-grained CFD-DEM method for reacting flow. The fluidized bed reactor used for iron ore reduction contains a large number of fine particles, and the complete conversion of iron ore to metallic iron generally takes several minutes to tens of minutes, which leads to the high time cost of simulating the complete conversion cycle of …

The oxidation roasting of carbon-bearing micro-fine gold can eliminate or weaken the robbing effect of carbonaceous materials and clay, and destroy the encapsulation of micro-fine gold. The micropores …

The Panzhihua layered intrusion in the ~ 260 Ma Emeishan large igneous province is composed of melagabbro and Fe-Ti oxide ore bodies in the lower zone (LZ) and the lower part of the middle zone ...

However, compared with iron oxide pellets, they have a low porosity and thus a higher apparent density, and consequently, a worse reducibility. The use of organic binders should improve the reducibility. ... The Midrex …

The magnetite from the Fe–Ti (–V) oxide ore layers displays complex ilmenite and spinel ... whole-rock composition, mineral assemblages, and composition of minerals such as the Fe–Ti oxides. The Fe–Ti (–V) oxide mineralization is fine-grained, massive to foliated, and magnetite–ilmenite-dominated, containing varying amount of ...

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The LZ (~ 100 m thick) is composed of coarse-grained melagabbro and Fe–Ti oxide ore layers. The oxide ore layers are generally tabular with planar upper and lower boundaries to the host gabbro. Individual layers have thicknesses ranging from a few centimeters to ∼ 60 m, and many can be traced along the strike for ~ 19 km in outcrops …

Fine-grained iron oxide ore is a kind of enormous refractory iron ore worldwide. Reduction roasting-magnetic separation is a common processing technique to upgrade and recover iron from this kind of iron ore, and coke/coal is the typical reducing agent used in the roasting process (Faris et al. 2017 ; Quast 2018 ; Roy et al. 2020 ).