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function of chromite

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Reducing energy consumption by alternative processing

The carbothermic reduction of chromite ore to produce high carbon ferrochromium is among the most energy intensive metal extraction processes performed, due not only to the highly endothermic nature of the reduction reactions but also the very high operating temperatures required for the smelting operation to separate the chrome-containing alloy from the discard slag.

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Compositions of chromite, associated minerals, and

Jul 01, 2014Read Compositions of chromite, associated minerals, and parental magmas of podiform chromite deposits The role of slab contamination of asthenospheric melts in suprasubduction zone environments, Gondwana Research on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

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Dan spots shortwave radios in the film "Operation Chromite

Jan 22, 2018Many thanks to SWLing Post contributor, Dan Hawkins, who writes. Operation Chromite (2016) is a South Korean film about the invasion of Inchon by UN forces in September, 1950. This film began streaming on Netflix in the USA on January 15, 2018 and is in the Korean and English languages.

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1 Revision n 2 (February 2 2014) 2 3 Pressure-volume

76 significantly increase as a function of increasing Fe2, namely chromite content (Lenaz et al. 77 2004). Furthermore, both the cell edge a0 and the oxygen positional parameter u also increase 78 with chromite content. 79 The study of comparative compressibility between ordered and

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Chromium(VI) sorption efficiency of acid-activated banana

Main content area. Chromium(VI) sorption efficiency of acid-activated banana peel over organo-montmorillonite in aqueous solutions

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Chromite; from the fiery rain of chondrules to the Kilauea

Chromite, spinel and magnetite compositions from a wide range of geological environments have been accumulated from published and unpublished sources in order to better characterize the spinel-group mineral as a function of environment of formation. Approximately 17 000 analyses have been included in a spinel database.

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Mineralogical characterisation of chromite in the UG2 Reef

Mineralogical characterisation of chromite in the UG2 Reef from Waterval Mine, Western bushveld implications for minerals processing. Opoubou-Lando, Serge-Driver (2010-03) This is most likely a function of the presence of alteration phases and the presence of coarser chromite grains, as well as already brecciated chromite grains.

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The Selective Carbothermic Reduction ofChromite

The Selective Carbothermic Reduction ofChromite T. R. Curr*, L. R. Nelson** and L. B. McRae* *Pyrometallurgy Division, Mintek, Posthumous, South Africa **Chromium R D Dept., Billiton Process Research, South Africa a INTRODUCTION The selective carbothermic reduction ofTransvaal chromite in a DC arc furnace was the subject of an extensive

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Platinum-Group Minerals and Other Accessory Phases in

of chromite also occur, associated with various types of Uralian ophiolites ( and references therein). Ophiolitic chromitites in general, as well as those occurring in the Urals, show a wide compositional range from Al-rich to Cr-rich chromite. This compositional variation is a function of many factors such

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Calcium Chloride-Assisted Segregation Reduction of

This paper describes an innovative process for the production of ferrochromium alloy via segregation reduction of chromite at 1300 C in the presence of calcium chloride. Both charcoal and petroleum coke were used as the reductant. Individual polycrystalline ferrochrome carbide particles were produced, with their particle size and shape resembling that of the starting carbon particles.

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Authors Sergedriver OpouboulandoAbout Mineral processing Mineralogy Chromite

Chromite in komatiites 3D morphologies with implications

Abstract High-resolution X-ray computed tomography has been carried out on a suite of komatiite samples representing a range of volcanic facies, chromite contents and degrees of alteration and metamorphism, to reveal the wide range of sizes, shapes and degrees of clustering that chromite grains display as a function of cooling history.

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Estimating effect of chrome ore granulometry on

properties are a function of various factors such as ore composition, physical properties of ores, ore granulo-metry, binder, moisture, coke, sintering temperature and sintering time. 712 Lekatou and Walker studied the behaviour of chromite pellets and tried to establish a relationship between ore granulometry, pellet size and ore composi-

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What are the functions of a geologist in a mining company

Recently as an under graduate student I visited Chromite mines in Sukinda valley in Odisha . We were guided through the major processes . Let's have a glance. Things Geologist do in a mining area * Locate the place where mineral depositions are

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Chromite-PGE mineralization in the Uktus Alaskan

Chromite-PGE mineralization in the Uktus Alaskan-Type Complex (Central Urals, Russia) Giorgio Garuti 1, V. Evgeny Pushkarev2, Federica Zaccarini, Roberto Cabella3 and Elena Anikina2 1Department of Earth Sciences, University of Modena, (Italy) 2Institute of Geology and Geochemistry, Ekaterinburg (Russia) 3Department for the study of the Territory and its Resources, University of Genoa, (Italy)

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Mineralogy as a function of depth in the prehistoric

The electron probe X-ray microanalyzer has been used to determine the compositional variability of the groundmass minerals and glass in 10 specimens from a complete 225-foot section of the prehistoric tholeiitic lava lake of Makaopuhi Crater, Hawaii. The order of beginning of crystallization was (1) chromite, (2) olivine, (3) augite, (4) plagioclase, (5) pigeonite, (6) iron-titanium oxides

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PRODUCTION AND CONTROL OF SODIUM

process transfer function was identified using MATLAB Black Box model. Then the overall transfer function, the closed-loop, and the characteristic equation was determined, and the 500kg of chromite was crushed and entered the roaster with sodium carbonate to produce

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chromiumos/chromite Git at Google

chromite/utils. This folder contains smaller, generic utility functionality that is not tied to any specific entities in the codebase that would make them more at home in a lib module. chromite/infra. This folder contains the chromite-specific infra repos. chromite/* There are smaller folders with miscellaneous functions like config, licencing

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Published in Propellants, Explosives, Pyrotechnics 2008Authors Prajakta R Patil V N Krishnamurthy Satyawati S JoshiAffiliation Savitribai Phule Pune UniversityAbout Thermal decomposition Ammonium perchlorate Copper oxide Copper

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Properties and Uses of Chromium ScienceStruck

May 10, 2018Chromium, a transition metal, has found a number of industrial uses due to its toughness and resistance to heat and corrosion. It is widely used for manufacturing stainless steel. This ScienceStruck article gives you some important properties and uses of this transition metal.

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Degradation mechanisms of magnesia-chromite refractories

Jul 18, 2013AbstractMagnesiachromite bricks are used as refractories for the refining of stainless steel in vacuumoxygen decarburisation (VOD) ladles. Refractory wear is not uniform. In the present work, worn bricks from different zones in the ladle have been analysed, and a set of interdependent degradation mechanisms is proposed. Refractory wear as a function of position in the ladle is

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Chemistry of Chromium Chemistry LibreTexts

Chromite is the complex of (FeCr_2O_3), or iron chromium oxide. Chromium is also found in other minerals, including magnesiochromite ((MgCr_2O_4)). Chromite is found in earth's mantle and is mined most abundantly in South Africa, India, Kazakhstan and Zimbabwe. Through the refining processes, chromite produces both ferrochromium and

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Experimental Studies on Properties of Chromite-based

as a function of input process parameters (in coded form), that represents the permeability of the chromite-based resin bonded sand core system. more than 0.05. Thus, the relationship of percentage (1) To examine the effect of various input parameters and their interaction terms on permeability, a significance test (refer to Table 2) has been

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Ferrochrome Wikipedia

Ferrochrome, or Ferrochromium (FeCr) is a type of ferroalloy, that is, an alloy between chromium and iron, generally containing 50% to 70% chromium by weight.. Ferrochrome is produced by electric arc carbothermic reduction of chromite.Most of the world's ferrochrome is produced in South Africa, Kazakhstan and India, which have large domestic chromite resources.

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The Chromium Projects

The Chromium projects include Chromium and Chromium OS, the open-source projects behind the Google Chrome browser and Google Chrome OS, respectively. This site houses the documentation and code related to the Chromium projects and is intended for developers interested in learning about and contributing to the open-source projects.

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Samancor Chrome Mines Mining Technology Mining

With low electricity prices, South Africa has been able to expand chromite and ferrochrome production more or less continuously since the AOD process was developed in the 1960s to use ferrochrome smelted from lower-grade ores. Samancor was created in

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Production Smelting Technologies for Ferrochromium

smelting chromite ore in a submerged arc furnace is reviewed and its Most of the reduction reactions taking place in the submerged arc furnace are highly endothermic and are listed in Table 1 along with standard Gibbs free energies as a function of temperature 11.11, Table 1 also lists for various reactions

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11.5 Refractory Manufacturing US EPA

11.5 Refractory Manufacturing chromite, magnesite, silica, silicon carbide, zircon, and other nonclays. Refractories are produced in two basic forms, formed objects, and unformed granulated or The emission of SOx is also a function of the sulfur content of certain clays and the plaster added to refractory materials to induce brick

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Experimental constraints on the partitioning of Ru, Rh,

Experimental constraints on the partitioning of Ru, Rh, Ir, Pt and Pd between chromite and silicate melt The importance of ferric iron James M. Brenan a,⁎, Craig F. Finnigan a,b, William F. McDonough c, Veronika Homolova a,d a Department of Geology, University of Toronto, Toronto, Canada b Kaminak Gold, Ltd., Vancouver, Canada

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Chromite deposits of the Sagua-Baracoa range,

Chromite settled along the path of ascending magma in a spreading zone, in magma chambers andtraps of various size and at various levels, as a function of the composition of the multiple magmas and equilibrium conditions.

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THE ATTACK OF CHROMITE BY SULPHURIC ACID

Degree of attack chromite as a function acid concentration. The amount acid present is 200% of eq~~ivalence and the time is 21 hours, except for blackened points which are 7.5 hours and 200 C. included in these plots discloses no behavior contrary to the conclusions drawn from the data selected.

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