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Magnetite ultrafine particles/porous reduced graphene oxide

2020年6月1日  Hence, such ultrafine magnetite particles grown onto a porous reduced GO network directly imprinted onto a Ni substrate could be a promising candidate for high

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Mineralization characteristics of pellets prepared by ultrafine ...

2022年10月25日  The reducing property of pellets prepared by ultrafine magnetite concentrate (UMC) and improving method were revealed. The results show that the

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Hydrothermal preparation and characterization of ultrafine magnetite ...

1994年9月1日  Ultrafine magnetite particles were prepared through a hydrothermal process at 130°–150°C from a solution of iron chloride and iron powder in the presence of urea.

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Mineralization characteristics of pellets prepared by

2023年4月20日  The reducing property of pellets prepared by ultrafine magnetite concentrate (UMC) and improving method were revealed.The results show that the

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Selective Flocculation Enhanced Magnetic

2016年8月23日  Magnetite generally occurs as singular particles, such as those in micro-zones 1, 2, and 6, but some are also seen aggregated with gangue minerals, such as micro-zone 5.Ultrafine magnetite particles

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Formation of ultrafine-grained magnetite in soils Nature

1988年11月24日  Here we report the recovery and identification of pure, ultrafine-grained magnetite from some UK soils that have no apparent external source of magnetite.

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Pure ultrafine magnetite from carbon steel wastes

2019年1月1日  This paper proposes a straightforward air-aqueous oxidation of St3 steel wastes for mass production of pure ultrafine magnetite. The characterization of the

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Ultrafine Magnetic Particles: A DIET-Proxy in

2021年2月26日  Magnetic particles formed by dissimilatory iron-reducing bacteria are typically ultrafine, as such generating mineral carriers with superparamagnetic properties, (e.g. ultrafine magnetite or greigite) from

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Particle size and wettability effect of ultrafine magnetite

To investigate the effect of particle size and wettability of ultrafine magnetite concentrates on ballability, ballability, balling test, and performance test were performed. The results

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Improving roasting performance and consolidation of pellets

2020年4月8日  For improving the strength of pellets made of ultrafine and super-high-grade magnetite concentrates, the influence of basicity (CaO/SiO2 ratio) on the roasting and consolidation of pellets was investigated. The results showed that with the basicity of pellets increasing from 0.09 to 0.60, the compressive strength of both preheated and roasted

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五千多元的显示器有多惊艳？LG UltraFine 4K 深度测评 - 知乎

2022年2月4日  LG UltraFine 4K 我已经深度使用半年多了，其实早就想分享测评体验了的，只是科研狗一直没空。. 它给我的第一印象就是惊艳和震撼，当时我还迫不及待地在知乎发了一条想法夸赞它（当然它也有缺点，但总体来说瑕不掩瑜）。. 首先还是从开箱开始说吧。.

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Particle size and wettability effect of ultrafine magnetite

Two kinds of magnetite concentrates from Pilbara in Australia and an area in the northeast in China were used to explore the effect of wettability, which depends on particle size, on ballability. Capillary osmosis equipment of a horizontal plate was constructed based on the equation Washburn. To investigate the effect of particle size and wettability of ultrafine

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Simultaneous Removal of Multiple Heavy Metal Ions from

2019年4月30日  Herein, ultrafine magnetite NPs were synthesized by co-precipitation method and successfully used as adsorbents for the removal of four mixed metal ions (Pb 2+, Cd 2+, Cu 2+, and Ni 2+) from contaminated river water, which represents hitherto the greatest application in removal of metal ions by magnetite NPs. The key to this success

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Oxidation and Induration Characteristics of Pellets Made

2016年9月1日  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. However, very

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Improvement of roasting and metallurgical properties of

2020年10月1日  Fluorine-bearing magnetite is a special iron ore found in Inner Mongolia, China [5,6]. The majority of fluorine-bearing iron ore was adopted by the Baotou Iron Steel Group to produce iron and steel [6,7]. With the utilization of fluorine-bearing iron ore, many serious problems have occurred because of the high fluorine content [[8], [9], [10]].

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Selective Flocculation Enhanced Magnetic Separation of Ultrafine ...

2016年8月23日  Simple magnetic separation for a certain magnetite mine with ultrafine disseminated lean ores has resulted in low performance, as the fine sizes and aggregation of ground mineral particles have caused inefficient recovery of the ultrafine minerals. In this study, we attempt to increase the apparent sizes of target mineral particles, and improve

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Magnetite ultrafine particles/porous reduced graphene oxide

2020年6月1日  Here, we report a simple and green electrochemical route to fabricate a porous network of a Fe3O4 nanoparticle-porous reduced graphene oxide (p-rGO) nanocomposite supported on a nickel-foam substrate, which is directly used as a binder-free charge storage electrode. Through this method, pristine Fe3O4 NPs/Ni, p-rGO

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如何评价 LG UltraFine 4K / 5K 显示器？ - 知乎

2022年2月4日  UltraFine 5K 接口为一个 94W 雷雳 3 接口、三个 Type-C 接口，UltraFine 4K 为两个 85W 雷雳 3 接口（支持 4K 菊花链）、三个 Type-C 接口。 对于 LG UltraFine 5K，我个人宁愿上 iMac，极其优秀的视网膜显示屏，还送电脑、送妙控键鼠等，内置优秀的摄像头、扬声器、麦克风，支持「嘿Siri」，接口拓展也更全，就问 ...

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The role of thermal improvements in indurating machines for

2020年10月23日  The scarcity of iron ore concentrate resources is a real fact, and a search for alternative resources seems to be unavoidable [1, 2].For many years, magnetite iron ore mines, containing high-sulfur content (up to 2.0%), were not very welcomed in steel industry; however, they are nowadays increasingly receiving attention as potential sources and

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Mac重度用户的小众显示器标配：LG UltraFine 4K使用体验 ...

2021年9月23日  因此，对于少数重度Mac使用者而言，LG UltraFine 4K是一款做工扎实、色彩均衡、尺寸全面的显示器。. 从5356元的售价以及产品定位来看，LG UltraFine 4K注定是一款极其小众的产品。. 我之前也曾考虑过戴尔U2720，它或许是4500元价位段内综合体验最好的4K显示器之一了 ...

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Some basic properties of granules from ore blends

Some basic properties of granules, including the granule size distribution, packed-bed permeability, and chemical composition of the adhering layer, were investigated in this study for four iron ore blends consisting of 5wt%, 25wt%, and 45wt% ultrafine magnetite and 25wt% ultrafine hematite concentrates. The effects of varying the sinter basicity

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Mineralization characteristics of pellets prepared by ultrafine ...

2022年10月25日  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% ...

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Investigation of formation of silica-coated magnetite

2005年7月15日  The ultrafine magnetic particles were precipitated with acetone, and the supernatant was decanted with the help of a magnet. Subsequently, water was added to redisperse ultrafine magnetic particles. Then, the resultant dispersion was treated by dialysis and adjusted to 2.0 wt.%. The obtained magnetite dispersion was defined as magnetic

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Some basic properties of granules from ore blends

International Journal of Minerals, Metallurgy and Materials (IJMMM, ISSN 1674-4799, CN 11-5787/TF, monthly, started in 1994, formerly known as Journal of University of Science and Technology Beijing) is an international journal devoted to publishing original ...

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Simultaneous Removal of Multiple Heavy Metal Ions from

2019年4月24日  Herein, ultrafine magnetite NPs were synthesized by co-precipitation method and successfully used as adsorbents for the removal of four mixed metal ions (Pb 2+, Cd 2+, Cu 2+, and Ni 2+) from contaminated river water, which represents hitherto the greatest application in removal of metal ions by magnetite NPs. The key to this success

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of Ultrafine Disseminated Magnetite Ores - ResearchGate

adhesion with feldspar; ultrafine quartz in aggregated grains or veins are common; dissemination is highly non-uniform, the fineness size is below 0.15 mm; particularly, 50% of the grains are of ...

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Palaeoclimatic records of the loess/palaeosol sequences

2016年12月15日  The median particle size (Md, μm) and magnetic susceptibility (SUS, 10 −8 m 3 kg −1) records for 12 sediment sequences along a north-south transect of the Chinese Loess Plateau. Shaded intervals represent interglacial stages. The axes for the particle size data are reversed compared with the magnetic susceptibility data.

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Micromagnetics and magnetomineralogy of ultrafine magnetite

2013年4月18日  [1] Iron oxide inclusions in pyroxene crystals from the Modipe Gabbro, Botswana, have been studied to determine their recording fidelity. Hysteresis parameters, first-order reversal curves, isothermal remanent magnetization acquisition curves, and thermomagnetic data all indicate that the iron oxide occurs as stoichiometric magnetite in

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Preparation of ultrafine magnetite and its oxygen adsorption

2010年10月15日  However, ultrafine magnetite with higher surface area than the former is necessary to synthesize gas adsorption-active magnetite. We therefore studied the preparation of ultrafine magnetite by reflux method using organic precipitant and solvent, and report the specific surface area and gas adsorption properties of O 2, N 2 and mixed

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