produits chromite mineral

Chromite Mineral Data
Empirical Formula: Fe 2+ Cr 2 O 4 Environment: Cummulate mineral found in ultramafic portions of layered mafic intrusions. Common in meteorites. IMA Status: Valid Species
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Chromite - an overview ScienceDirect Topics
The chromite mineral is the primary source of chromium metal with applications in hard rustles steel, chrome plating, anodizing of aluminum, super refractory bricks, pigments
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Chromite Chromium Ore, Properties, Uses and
2023.4.23 Chromite is an oxide mineral that an iron chromium oxide with formula: FeCr2O4. It is belonging to the spinel group. Chromite is
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铬铁矿成矿作用与研究进展
2020.11.6 Mineral Deposita, 29: 98-101. doi: 10.1007/BF03326400 Zhou M F, Robinson P T, Su B X, Gao J F, Li J W, Yang J S, Malpas J. 2014. Compositions of chromite, associated minerals, and parental
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Chromite: Mineral information, data and localities.
Chromite is the most important chromium ore mineral. It forms a complete solid solution series with many other members of the group, eg. in the Chromite-Hercynite Series, Chromite-Spinel Series, Chromite-Magnetite
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Chromite - an overview ScienceDirect Topics
Chromite, the only commercial source of chromium, is a spinel group mineral that occurs in ultramafic igneous rocks and further occurs exclusively in rocks formed by the intrusion
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Minerals Special Issue : Chromite Deposits: Mineralogy, Petrology and ...
2022.2.10 This Special Issue will focus on recent advances in the study of geology, mineralogy, and geochemistry of chromite deposits from different geological settings for
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Chromitite layers indicate the existence of large, long-lived,
2022.3.8 In this group of hypotheses, the massive chromitites are produced from crystal-rich mushes by physical separation of chromite from coexisting silicate minerals
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Co-Ni在镁铁-超镁铁层状岩体中的分布特征及对岩浆成
2023.4.15 correlation diagram of olivine/chromite mineral mode ratios and the whole-rock Co/Ni ratios (e) in the Stillwater Complex Figure 4. Stratigraphic trends of the Co-Ni contents in whole-rock, olivine,
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Minerals Free Full-Text Automated and
2023.2.16 A characterization study of chromite ore from South Africa was conducted using bulk assays, X-ray diffraction, optical, scanning electron microscopy (SEM), automated electron probe microanalysis
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Chromite- mineralogy and processing - ScienceDirect
1988.1.1 Chromite is an important strategic mineral. In this paper, its deposition, mineralogical properties, and beneficiation are briefly reviewed. Recommended articles. ... element used in numerous applications in the metallurgical, chemical, foundry sand, and refractory industries. Chromite (FeCr 2 O 4) is the only commercially recoverable source
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Distribution and mineralogy of platinum-group elements in
Polyphase, penetrative hydrothermal metasomatism in chromitites of the Campo Formoso layered intrusion produced spectacular chromite – ferrian chromite zoning and transformed the primary intercumulus silicates into a chlorite – serpentine – carbonate – talc assemblage. Alteration did not substantially modify the composition of chromite cores and the
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Chromite: The only mineral ore of chromium metal
Chromite is an oxide mineral composed of chromium, iron, and oxygen (FeCr 2 O 4 ). It is dark gray to black in color with a metallic to submetallic luster and a high specific gravity. It occurs in basic and ultrabasic igneous rocks and in the metamorphic and sedimentary rocks that are produced when chromite-bearing rocks are altered by heat or ...
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Mineralogical Analysis of a Chrome Ore from South
2018.1.19 origins and deposits of chromite are different according to previous research reports, but the origins of chromite minerals are similar, it is generally believed that Fig. 2 Morphology and phase identiﬁcation of particles before and after grinding Fig. 3 Phase and structure of chromite particles in chrome ﬁnes. a Mono particles of chromite;
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Chromite - ScienceDirect
2016.1.1 Chromite (Cr) occurs exclusively in mafic and ultramafic igneous rocks (Papp and Lipin, 2006).Although some Cr-based minerals such as crocoite (PbCrO 4), vauquelinite (Pb 2 Cu[CrO 4][PO 4]), uvarovite (Ca 3 Cr 2 [SiO 4] 3), and merumite (4(Cr,Al) 2 O 3 3H 2 O) are well known, chromite (FeCr 2 O 4) is the only one that is a
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Chromite: Mineral information, data and localities. - mindat
Chromite is the most important chromium ore mineral. It forms a complete solid solution series with many other members of the group, eg. in the Chromite-Hercynite Series, Chromite-Spinel Series, Chromite-Magnetite Series and the Chromite-Magnesiochromite Series.It is the iron analogue of Zincochromite, Cochromite, Manganochromite and
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Chromitite layers indicate the existence of large, long-lived,
2022.3.8 In this group of hypotheses, the massive chromitites are produced from crystal-rich mushes by physical separation of chromite from coexisting silicate minerals 36,37,53,71,72.
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Occurrence and mineral chemistry of chromite and related
2016.10.27 The Hongshishan mafic-ultramafic complex is located in the western Beishan Terrane, NW China, and hosts an economic Ni-Cu deposit. Chromite as accessory mineral from the complex is divided into three types based on its occurrence and morphology. Quantitative electron probe microanalysis (EPMA) have been conducted on
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Minerals Free Full-Text Origin and Nature of
2020.11.25 The mineral chemistry of chromite and silicate minerals in the Baixintan magmatic Ni-Cu sulfide deposit in the Northern Tianshan, southern Central Asian Orogenic Belt (CAOB) are reported here. Two
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The Effect of Particle Size Distribution and Liberation Degree
2020.10.27 By investigating the distribution of chromite grade in different size fractions in spiral 1 feed, it is observed that the + 75–250 micron fraction has the highest grade of Cr 2 O 3, Al 2 O 3, and Fe 2 O 3 (components of chromite mineral) (Fig. 5). While in spiral 2 feed, chromite particles have accumulated in the fine size fraction (− 45 ...
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蛇绿岩中铬铁岩母岩浆的富Ca特征:矿物包裹体证据
2017.12.18 BSE images of uncommon mineral inclusions in chromite in the Pozantı-Karsantı ophiolite in Turkey 下载: 全尺寸图片幻灯片图 7 土耳其Pozantı-Karsantı蛇绿岩中铬铁矿的矿物包裹体背散射图和元素分布 a.橄榄石；b.单斜辉石；c.单斜辉石和金云母的复合型 ...
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Minerals Free Full-Text A Process Mineralogical Evaluation of ...
2020.8.12 Chromite is a member of the spinel group and is the only economically important ore mineral of chromium. It is used extensively by the metallurgical industry as feedstock for ferroalloy production [1,2,3,4].Chromite ore is commonly classified into different grades based on the Cr/Fe ratio as well as the Cr 2 O 3 content. These being
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Chromium (Cr) Ore Minerals, Formation, Deposits
2023.4.23 The mineralogy of chromium (Cr) ore deposits is primarily dominated by the presence of the mineral chromite (FeCr2O4), which is the main chromium-bearing mineral. Chromite is a dark, opaque mineral with a high specific gravity and metallic luster. It is typically found in the form of euhedral crystals, irregular grains, or as interstitial ...
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Minerals Free Full-Text Origin of Podiform Chromitites in
2022.7.30 The presence of PGM associated with the podiform chromitites in the Jurassic–Cretaceous ophiolite of Sebuku Island (South Kalimantan, Indonesia) is reported for the first time. Two types of chromitite have been recognized; one with high-Cr composition (Cr/(Cr + Al) > 0.7) occurs in the deep mantle, the other, high-Al (Cr/(Cr + Al)
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Minerals Free Full-Text ASTER-Based Remote Sensing
2021.7.19 A single chromite deposit occurrence is found in the serpentinized harzburgite unit of the Khoy ophiolite complex in northwest Iran, which is surrounded by dunite envelopes. This area has mountainous features and extremely rugged topography with difficult access, so prospecting for chromite deposits by conventional geological
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Platinum-bearing chromite layers are caused by pressure
2018.1.31 The origin of platinum-bearing chromitites (up to 90 vol.% chromite), which occur as monomineralic layers up to a few metres thick and hundreds of kilometres in length within mafic-ultramafic ...
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CHROMITE: FROM THE MINERAL TO THE COMMODITY
2013.2.5 Chromite belongs to the spinel group with the general chemical formula XY2O4, where X and Y represent divalent and trivalent metal ions, respectively. Four types of chromite ore deposits occur as either lode or secondary deposits. Lode chromite ore deposits comprise stratiform and podiform deposits, whereas secondary chromite ore
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Chrome Compounds: Refractory Cements, Refractory
3 天之前 Chrome flour is the incredibly finely ground powder of iron chromite and is used extensively in the production of magnesia chrome refractory bricks, for the construction of furnaces and kilns(16,17). In refractory brick form, chromite alongside alumina and magnesium oxide has been shown to be stable and strong up to 1,900°C(18).
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Petrogenesis of the massive chromitite layer from the
2019.8.22 The Jacurici Complex hosts the largest chromite deposit in Brazil in an up to 8-m-thick chromitite layer within a tectonically segmented 300-m-thick intrusion. The ore has been interpreted as the result of crustal contamination-driven crystallization in a magma conduit. This study addresses the stratigraphy, mineralogical and textural relationships,
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Chromite- mineralogy and processing - ScienceDirect
1988.1.1 Minerals Engineering, Vol. 1, No. 3, pp. 235-240, 1988 0892-6875/88 $3.00 + 0.00 Printed in Great Britain Pergamon Press ple CHROMITE- MINERALOGY AND PROCESSING F.GU% and B.A.WILLS§ % Dept.of Mineral Engng., Qingdao Employee's College of Mines, Qingdao, Shandong, People's Republic of China § Camborne School
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PGE geochemistry and platinum-group minerals in
2023.7.26 Abstract Podiform chromitites, a part of Nidar ophiolite complex from the Indus Suture Zone (ISZ), southeast Ladakh, host significant platinum-group elements (PGE) and platinum-group of minerals. These high Cr chromitites are found to be enveloped within the dunite rocks in the form of massive, semi-massive and stringers and as disseminated
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Magnétite : Propriétés, Occurrence, Formation, Dépôts
2023.9.8 C'est un minéral noir d'aspect métallique doté d'une propriété magnétique distinctive, d'où son nom. La magnétite a la formule chimique Fe3O4, ce qui signifie qu'elle est composée de deux ions fer (Fe) combinés à trois ions oxygène (O). Voici quelques informations sur l’occurrence et la formation de la magnétite :
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Magnetic prospecting and geochemical analysis for the mineral ...
2020.9.4 Chromite is an oxide mineral composed of chromium, iron, and oxygen (FeCr 2 O 4). It occurs in mafic and ultramafic igneous rocks and in the metamorphic and sedimentary rocks that are produced when chromite-bearing rocks are altered by heat or weathering (Seal II et al. 2017). Chromite is sometimes slightly magnetic.
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Chromium Ore, Chromite, Properties, Uses, Distribution Map
2023.6.28 The mineral chromite is the primary source of chromium. South Africa, Kazakhstan, India, Albania, and Turkey are among the countries that mine it. Here is the map of Chromite Distribution in the World attached below: Read More: Cobalt Ore. Chromium Ore Properties. Chromium ore is a naturally occurring mineral that contains
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Minerals Free Full-Text An Overview of Currently Applied ...
2023.6.13 Approximately 82 different minerals contain chromium (Cr), of which chromite is the only economically viable Cr source being exploited in large volumes [1,2]. The chromite mineral belongs to a spinel mineral group characterized by the formula [(Mg, Fe 2+)(Al, Cr, Fe 3+) 2 O 4] [3,4]. The heat-, corrosion-, and oxidation-resistance of
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中国大陆岩石圈地幔镍-钴-铂族元素组成及其成矿意义: 地幔捕 ...
2022.12.19 Wang CY, Zhou MF and Zhao DG. 2005. Mineral chemistry of chromite from the Permian Jinbaoshan Pt-Pd- sulphide-bearing ultramafic intrusion in SW China with petrogenetic implications. Lithos, 83(1-2): 47-66 doi: 10.1016/j.lithos.2005.01.003 Wang CY
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Chromite: Mineral information, data and localities. - Mindat
Chromite is the most important chromium ore mineral. It forms a complete solid solution series with many other members of the group, eg. in the Chromite-Hercynite Series, Chromite-Spinel Series, Chromite-Magnetite Series and the Chromite-Magnesiochromite Series.It is the iron analogue of Zincochromite, Cochromite, Manganochromite and
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Origin of high-Cr podiform chromitites from Kabaena Island,
2023.1.16 Chromite-hosted silicate inclusions include olivine, clinopyroxene, orthopyroxene and amphibole and are characterized by higher Mg/Fe ratios than those of host peridotites. The geothermobarometry of chromite-hosted clinopyroxene-orthopyroxene pairs indicates that the estimated T-P conditions of the parental magma of the Kabaena
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