>

Anaerobic magnetite production by a marine, …

Bacterial production of magnetite represents a significant contribution to the natural remanent magnetism of deep-sea and other sediments1–5. Because cells of the freshwater magnetotactic ...

>

Improvement on the thermal cracking performance of …

Its superiority made it a significant way for the cleaner production of iron making. Usually, the high-grade iron ore is used to produce pellet. ... has found that higher roasting temperature and longer roasting time can help the pellet which was made of ultrafine magnetite (particle below 0.025 mm accounts for 91.20%) from western …

>

Effect of Ultrafine Powder Reduction Combined with …

NdFeB permanent magnets are pivotal components for offshore wind turbines and electric vehicles, both of which demand exceptional magnetic properties. This study presents an innovative fabrication method for NdFeB magnets that eliminates the need for heavy rare earths in grain boundary diffusion. Through ultrafine powder …

>

Microbial production and characterization of superparamagnetic

The production of ultrafine-grained magnetite by magnetotactic bacteria in surficial aerobic sediments may contribute significantly to the natural remanent magnetism of sediments2-4. However ...

>

Full article: Synthesis and characterization of magnetite …

The reaction for production of magnetite is relatively slower than other neutralization reactions, and therefore a very low concentration of magnetite is expected to be present at the start of the reaction. ... (2018) A model for the particle mass yield in the aerosol synthesis of ultrafine monometallic nanoparticles by spark ablation. Journal ...

>

Ultrafine Magnetic Particles: A DIET-Proxy in …

Other non-DIET reactions with Fe(III) reducing bacteria such as Geothrix with may also have a role in the production of magnetite (Klueglein et al., 2013) and there may be some syntrophy with …

>

Biodegradable ether amines for reverse cationic flotation …

˜e extraordinary growth in steel demand has emerged in iron mines for further production. Magnetite and hematite (iron oxides) are the primary iron resources mainly upgraded by magnetic ...

>

Production of reduced iron powder using ultra-fine iron concentrate

The using of the iron to extract reduced iron with TFe≥69.5% Al2O3+SiO2<0.3% was studied. Preparation of reduced iron powder in this experimental research can produce ultra-pure magnetite concentrate. The quality of the final product reaches the product standard of SC 100.26 and NC 100.24.

>

The use of flotation to separate fine coal and ultrafine magnetite …

@article{osti_110014, title = {The use of flotation to separate fine coal and ultrafine magnetite from dense-medium cyclone products}, author = {Polat, M and Klima, M S and Chander, S and Ahuja, G}, abstractNote = {A study was conducted to investigate the use of flotation in combination with dense-medium cycloning utilizing ultrafine …

>

Microbial production of ultrafine-grained magnetite by …

A method of producing magnetite nanoparticles was developed through culturing a microorganism designated Haejae-1, Shewanella sp., in the presence of glucose and akaganeite (beta-FeOOH). Haejae-1 isolated from inter-tidal flat sediments was able to produce copious amount of ultrafine magnetite via g …

>

Enhancing Recovery of Ultra-Fine Magnetite from Low-Iron …

Compared to the results obtained from industrial production, the grade and magnetite recovery were increased by 0.76% and 15.22%, respectively. The recovery for ultra-fine (−6.0 µm) magnetite from the cyanidation tailings was improved via the regulation and controlling of feed flow and separation gap, namely reducing the drag …

>

Biodegradable ether amines for reverse cationic flotation …

The extraordinary growth in steel demand has emerged in iron mines for further production. Magnetite and hematite (iron oxides) are the primary iron resources mainly upgraded by magnetic separators before they are subjected to steelmaking processes. Nevertheless, magnetic separators are limited in processing fine and …

>

A novel method for efficient recovery of ilmenite by high …

The vanadium titanium magnetite deposit in Panzhihua has abundant ilmenite resources. A flowsheet combining high gradient magnetic separation (HGMS) and flotation was applied to recover the ilmenite, which had defects of high production cost due to high flotation regent consumption, low ilmenite utilization rate of 20% as ultrafine …

>

Microbial Production of Ultrafine-Grained Magnetite by Fermentation

Request PDF | Microbial Production of Ultrafine-Grained Magnetite by Fermentation Processes at Room Temperature | A method of producing magnetite nanoparticles was developed through culturing a ...

>

production de magnetite ultrafine

Microbial production of ultrafine-grained magnetite by fermentation processes at room temperature - PubMed. A method of producing magnetite nanoparticles was developed through culturing a microorganism designated Haejae-1, Shewanella sp., in the presence of glucose and akaganeite (beta-FeOOH). Haejae-1 isolated from inter-tidal flat sediments ...

>

ultrafine magnetite

The production of ultrafine-grained magnetite by magnetotactic bacteria in surficial aerobic sediments may contribute significantly to the natural remanent magnetism of sediments 2-4. However, recent studies on iron reduction in anaerobic sediments suggested that bacteria can also generate magnetite in the absence of oxygen 5.

>

Anaerobic production of magnetite by a dissimilatory iron …

The potential contribution of microbial metabolism to the magnetization of sediments has only recently been recognized. In the presence of oxygen, magnetotactic bacteria can form intracellular chains of magnetite while using oxygen or nitrate as the terminal electron acceptor for metabolism1. The production of ultrafine-grained magnetite by …

>

Oxidation and Induration Characteristics of Pellets Made …

Western Australian magnetite concentrates normally have ultrafine granularity and much higher specific surface areas than Chinese magnetite concentrates owing to the significant pre-grinding and beneficiation for saleable iron grade. Such characteristics will inevitably affect the subsequent pelletization process.

>

Formation of ultrafine-grained magnetite in soils

The magnetic properties of certain soils indicate the widespread presence of ultrafine-grained magnetite, even where there is no detrital input of magnetite1–3. This suggests that in situformation of magnetite can occur under soil-forming conditions. Schwertmann and Taylor4 have stated, however, that magnetite has not been found as a newly …

>

Inorganic Formation of Ultrafine-Grained Magnetite

First, magnetic measurements of natural materials are highly sensitive; they can detect the presence of ferrimagnetic minerals, such as magnetite, at concentrations as low as ten parts per million. Second, variations in the magnetic mineralogies, concentrations and grain sizes of natural materials are often diagnostic of their pathway of ...

>

Anaerobic magnetite production by a marine, …

Anaerobic magnetite production by a marine, magnetotactic bacterium Dennis A. Bazylinski*, Richard B. Frankelt & Holger W. Jannasch* *Department of Biology, Woods Hole Oceanographic Institution,

>

Mineralization characteristics of pellets prepared by ultrafine

The reducing property of pellets prepared by ultrafine magnetite concentrate (UMC) and improving method were revealed. The results show that the reduction degree of UMC pellets is only about 56% compared with that of pellets prepared from ordinary iron ore concentrate with relatively coarse particle size, which is significantly lower than the …

>

Pure ultrafine magnetite from carbon steel wastes

This paper proposes a straightforward air-aqueous oxidation of St3 steel wastes for mass production of pure ultrafine magnetite. The characterization of the obtained product has been made by X-ray fluorescence analysis, X-ray diffraction, impedance spectroscopy, low-temperature nitrogen absorption method, Möss …

>

A novel approach to enhance decrepitation temperature and …

Utilizing ultrafine iron ore concentrate for pellet production can expand domestic iron ore resources in China and promote the utilization of low-grade ores. However, a challenge arises with the low decrepitation temperature and reducibility in the preparation process of ultrafine iron ore concentrate pellets. To address the challenge, …

>

Assured Bio Labs, LLC on LinkedIn: Ultrafine Magnetite …

Ultrafine Magnetite Particle Pollution and Human Health Air pollution isn't just about gases; it also includes solid particles known as particulate matter (PM). Magnetite happens to be a common ...

>

Assessing the feasibility of silica-based media for coal …

Ultra-clean coal is the main reducing agent in the silicon production. • Magnetite used for cleaning coal is a challenging impurity in silicon market. ... Ultrafine silica fume was obtained to be used as a medium stabilizer with the silica sand. Silica fume, which is also called micro-silica, is an ultrafine powder generated during the ...

>

Anaerobic production of magnetite by a dissimilatory iron …

The production of ultrafine-grained magnetite by magnetotactic bacteria in surficial aerobic sediments may contribute significantly to the natural remanent magnetism of sediments2-4. However, recent studies on iron reduction in anaerobic sediments suggested that bacteria can also generate magnetite in the absence of oxygen5. We report here …

>

Anaerobic production of magnetite by a dissimilatory iron …

The production of ultrafine-grained magnetite by magnetotactic bacteria in surficial aerobic sediments may contribute significantly to the natural remanent magnetism of sediments2-4. However, recent studies on iron reduction in anaerobic sediments suggested that bacteria can also generate magnetite in the absence of oxygen5.