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It is expected that checking the chromite liberation and its locking type should contribute to a better understanding of the beneficiation mechanisms, performance of the separator, and prediction of a chromite particle behavior in downstream processing, as has also been emphasized by Leroy et al. (2011) and Pascoe et al. (2007).
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M.S.R.S. This paper reviews the ~ajor deposits of lower-grade chromite in the world, and a wide variety of methods used for the recovery of ch.romlum f~om them. Ga~gue materials in more coarsely sized ores can be separated by gravity ~ean~, whereas flotation techniques are required for finer-grained materials.
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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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The above concept was adopted in one of the operating chromite beneficiation plant at Sukinda. The approach adopted and practical problems encountered during the study were reported in this paper. ... The results obtained after the analysis of the beneficiated ore using wet chemical analysis and Atomic Absorption Spectrometer shows that Cr 2 O ...
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The Fe content in the FeCr produced depends on the chromite spinel Cr/Fe ratio. Therefore, the selective removal of Fe from the chromite spinel using different combinations of chromite pre-oxidation, pre-reduction, and sulphuric acid leaching was investigated. The Cr/Fe ratio of the case study ores could be increased from 1.57 up to …
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Chromite is an oxide of iron and chromium with the chemical composition ... In India, although a chromite beneficiation plant was in operation in the 1970s, the widespread
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Beneficiation is mostly limited to size reduction, desliming and classification. The yield is low of about 25-35%. During beneficiation, sub grade intermediate products of about 35-40% Cr203 get generated which finds very little or no use and these have been accumulating in the mines. A schematic diagram of a beneficiation
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Most of the beneficiation studies have reported a commercial grade of chromite concentrate with Cr 2 O 3 of around 48%, but all these processes have generated new waste, namely the chromite ore processing residue (COPR) which is washed away by water in the beneficiation circuit and collected in tailing dams.
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Prolonged development of ore deposits, ore beneficiation and metallurgical smelting of concentrates result in the accumulation of wastes, forming large-scale dumps and sludge ponds negatively affecting the environment and human health. The creation and introduction of industrial waste treatment technologies will make it possible to dispose of …
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2. Concentration. The predominant method to concentrate chromite stone is gravity separation. However, given the slightly different chromite properties around the …
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Therefore remarkably high value of fine chromite in tailings has been reported by many researchers.4–7 At this point, multigravity separator (MGS) which is a gravimetric concentrator making use of centrifugal forces to enhance the separation and which is very effective for the beneficiation of very fine materials appears to be a useful ...
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It is shown that during the beneficiation of chromite ore, significant volumes of value-containing tailings (in the form of rejected chromite) are generated. Improving …
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Chromite Beneficiation Process. Experience indicates that chrome ores are concentrated to best advantage by gravity methods. Since recoveries are generally very poor in the fine sizes, the gravity flowsheet …
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The majority of chromite ore beneficiation businesses are looking for an affordable method of enriching ultrafine chromite while eliminating wasteful gangue minerals, increasing recovery, and reducing operational costs. The average annual production of chromite in South Africa has increased over the past five years to 1500 000 t, with
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Chromium compounds are used extensively in the manu-facture of paint pigments and chemicals, as oxidizing agents in organic syntheses, as electrolytes in chromium plating …
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The beneficiation of low grade (Cr2O3% 26.88) chromite ore has been investigated using table. Optimization has been carried out using box-behnken statistical design (BBD).
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Semantic Scholar extracted view of "Characterization of Nickel in Chromite Beneficiation Tailings by Mineral Liberation Analysis and Its Recovery by H2SO4 Leaching Followed by Oxalic Acid Precipitation" by M. Altiner et al.
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The low-grade siliceous chromite ore from Ghutrigaon, Odisha, India, containing ~ 16% Cr2O3, with Cr/Fe ratio of 1.97 and ~ 55% of SiO2, does not find any use in metallurgical industry and hence considered as waste. Mineralogical investigation indicates the presence of chromite and quartz as major minerals with minor fuchsite and …
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1.0 Introduction. 1.1 Mineral Processing and Extractive Metallurgy. Mineral processing is a major division in the science of Extractive Metallurgy. Extractive metallurgy has been defined as the …
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Chromite demand in Turkey is mostly met by metallurgic-type ores. Chromite ore is one of Turkey's major income sources in primary mineral exports. Ferrochrome production of Turkey was different between 2007 and 2011, at 69.73–60.00 metric tons. The demand for chemical-type ores has also increased with the operation of sodium …
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Chemical composition, lattice constant and specific gravity were determined. ... In this study, the possibility of beneficiation of chromite in the Elazig-Kefdag region by Multi-Gravity Separator ...
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Chromium is one of such very important metal, although it is very rarely used in its metal form, is an essential ingredient for stainless steel making. tool, and alloy steel, nickel–chromium heating elements, and plating metals. However, the chromite mineral is widely used in the furnace linings as refractory and is also used as chemical ...
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Around 90% of mined chromite ore is converted into different grades of ferrochrome by the metallurgical industry. Stainless steel industry consumes about 80% of ferrochrome produced (mainly high-carbon/charge grade). Chromite varies widely in composition according to the chemical formula (Mg, Fe +2) (Cr, Al, Fe +3) 2 O 4. …
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1. Introduction. Chromite is the main source of chromium metal and an important raw material for the production of stainless steel, ferrochrome alloys, refractories, and …
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The investigations on chemical composition, mineral compositionMineral composition, ... Experimental research on beneficiation for a chromite ore in South Africa. Multipurp Util Miner Res 4:81–84. Google Scholar Zhu DQ, Li J, Fan XH et al (2004) Literature review of the agglomeration of chromite fines. Sinter Pelletizing 29(2):27–30
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2.1 Chromium in Steel Industry. The only important ore mineral of chromium is the chromite – FeO.Cr2O3 (68% Cr2O3, 32% FeO) which crystallizes in the isometric system. The hardness value is 5.5 ...
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Karagedik Chromite Concentrator of the ETI Holding Co., which is located in Fethiye (south Turkey), has been producing chromite concentrate assaying 47–48 % Cr2O3 from chromite ores containing ...
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Metallurgical, chemical or refractory-grade chromite concentrates can be recovered from low-grade chromite beneficiation plant tailings. 28,29. Astuti et al. 30 recently focused on the recovery of nickel from a pregnant leached solution without the initial removal of impurities. Specifically, they employed oxalate precipitation as a direct ...
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Beneficiation of South African chromite tailings using Magnetic Separation. Proceedings of the 6th World Congress on Mechanical, Chemical, and Material Engineering …
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The detailed study of chromite ore beneficiation processes reveals that the opportunities still exist to recover chromite values from the low/sub-grade ores and …
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