To reduce carbon dioxide emission in the process of barite reduction, many different reductants have been attempted for barite reduction such as methane (Alizadeh et al., 2007(Alizadeh et al ...
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Refractory sulphide–barite ore was reduced with carbon in order to release lead, zinc, and copper sulphide from barite-pyrite base. Mineralogical investigations …
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The applicable Barite color is selected depending on the ore body. This is the main ore of barium metal. It is also used as paint and plastic filler. It is applied for sound reduction in various engine compartments. This mineral is used for making smooth and corrosion resistant coat of trucks and automobiles.
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The present study deals with the reduction of barium sulfate (Barite) to barium sulfide by use of carbon as the reduction agent. Pellets of barite ore containing about 95% BaSO4 has been reduced … Expand. 1. PDF. Save. Role of extrusion process on kinetic of carbothermal reduction of barite. S. Jamshidi A. Salem.
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The results showed that the raw barite ore studied is composed basically of BaSO 4 (in barite) and SiO 2 (in quartz) and the particles have a smooth texture. Grinding for 30 minutes leads to 95% ...
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The present study deals with the reduction of barium sulfate (Barite) to barium sulfide by use of carbon as the reduction agent. Pellets of barite ore containing about 95% BaSO4 has been reduced ...
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Howbeit, the barite ore deposit is located at a distance from Lafia interior and is found in former Awe local government, Plateau state which is now Azara local government area in Nassarawa state, Nigeria (Adetoroye, 1998; Oden, …
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The hexaferrite precursors were obtained by the co-precipitation of BaS produced by the reduction of barite ore with carbon at 1273 K and then dissolved in diluted HCl and FeCl3 solution at pH 10 ...
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The hexaferrite precursors were obtained by the co-precipitation of BaS produced by the reduction of barite ore with carbon at 1273 K and then dissolved in diluted HCl and FeCl3 solution at pH 10 using NaOH as a base; the product was then annealed at 1273 K in an open atmosphere. The effect of Fe3+/Ba2+ molar ratio and the …
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The hexaferrite precursors were obtained by the co-precipitation of BaS produced by the reduction of barite ore with carbon at 1273 K and then dissolved in diluted HCl and FeCl3 solution at pH 10 using NaOH as a base; the product was then annealed at 1273 K in an open atmosphere. The effect of Fe3+/Ba2+ molar ratio and the …
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Pellets of barite ore containing about 95% BaSO4 has been reduced under different conditions of temperature, time, ore grain size and the type and grain size of the carbon materials. Graphite...
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The barite type ore is composed of banded barite, fluorite, bastnaesite, magnetite, and hematite (Fig. 4 g and h, Fig. 8). In addition, magnetite and hematite show veins crosscutting the barite, fluorite, and bastnaesite (Fig. 8). Barite is the main mineral with the abundance of approximately 20 %–65 %.
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The present study deals with the reduction of barium sulfate (Barite) to barium sulfide by use of carbon as the reduction agent. Pellets of barite ore containing about 95% BaSO4 has been reduced ...
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The present study deals with the reduction of barium sulfate (Barite) to barium sulfide by use of carbon as the reduction agent. Pellets of barite ore containing about 95% BaSO4 has been reduced ...
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The carbothermal reduction of barite is a complex multi-component and multi-phase reaction process. In this study, the HSC thermodynamic software and atomic matrix method were used to analyze the ...
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tions, Gibbs energies of barite and adequate metal sul-phides roasting, shown in Table 1, has been done before reduction roasting experiments. Copper in this ore is in the form of tetrahedrite, Cu ...
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A laboratory-scale investigation of the effect of milling operation and catalyst addition (K2CO3) on the partial reduction of low-grade pyrolusite ore pellets was carried out using coke as a reductant. Thermogravimetric analysis was used to understand the correlation between milling and catalyst addition parameters with the reduction …
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Barite is the primary ore of barium, which is used to make a wide variety of barium compounds. Some of these are used for x-ray shielding. Barite has the ability to block x-ray and gamma-ray emissions. Barite is used to make high-density concrete to block x-ray emissions in hospitals, power plants, and laboratories.
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The study was carried out on the decomposition mechanism of barite in the sintering mixtures of Jiuquan barite-containing iron ore concentrate during sintering, and on the interaction between barite and other constituents It showed that the decomposition of barite in sintering mixtures started at 1190℃ in air, and reached its maximum rate at …
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In the present work, we compared two modes of reduction of barite concentrate with brown coal in the presence of sodium hydroxide as a catalyst by …
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Firstly, barite ore is reduced by coke or methane, leading to produce barium sulfide as intermediate material in rotary kiln or fluidized bed reactor as follows …
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carbothermal reduction of barite, the yield of barium sulphide has been found to be almost double than with hard coal. At high temperature oxidation of steam coal with barite is very fast due to low activation energy and releases a good amount of carbon monoxide8-11(main reducing agent). This makes the reduction process easier and faster too.
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The aim of this work is to study the briquetting the high barite iron ore and reduce it in static bed by hydrogen. Keywords: High barite iron ore, reduction kinetics, diffusion …
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Carbothermal reduction process is almost the exclusive industrial method for manufacturing the above barium compounds from barite ore (Kresse et al., 2007; Kefeni and Mamba, 2021). The reduction process of barite using coke/coal is also called as black ash process (Jamshidi and Salem, 2010; Murthy and Reddy, 2012), in which barite is …
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The synsedimentary mineralization of the Type I, the presence of only primary single-phase liquid fluid inclusions within barite crystals and the gradual increase of δ 34 S for both barites and chalcopyrites with depth (from −7 to +18.9‰ V-CDT) suggest ore precipitation close to the vadose zone under bacterial sulfate reduction (BSR) in a ...
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Barium carbonate is an important industrial material. Conventional method of BaCO 3 preparation is based on high-temperature reduction of barite (natural barium sulfate) with coal, which produces a great amount of CO 2 (greenhouse gas). This research offers a clean method for BaCO 3 production with methane as the reducing agent, which …
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Pellets of barite ore containing about 95% BaSO4 has been reduced under different conditions of temperature, time, ore grain size and the type and grain size of the carbon materials.
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The paper reports the effect of nature of coal on the carbothermal reduction of barite by using different types of coal. Usually in industrial practices, the reductive operations are …
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Processing of Egyptian barite ore with a composition of 85.5% BaSO 4; 2.75%SiO2; 1.56%Fe2O3 and 5.1% Al2O3 was performed with the aim to prepare pure barium salts.
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As the BaO content increases to 4.5 and 5.5 mass%, the amount of heat evolved during oxidation of BaS supersedes that furnished by the amount of coke consumed in reduction of barite resulting a slight increase in the …
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The X-ray diffractogram shows that high barite iron ore concentrate pellets containing 1.5% bentonite shows that a-hematite is the main compound present in these pellets. Fig. 15. Effect of activated bentonite addition on the reduction extent of the high barite iron ore concentrate fired pellets (reduction temperature 800 jC).
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The present study deals with the reduction of barium sulfate (Barite) to barium sulfide by use of carbon as the reduction agent. Pellets of barite ore containing about 95% BaSO4 has been reduced under different conditions of temperature, time, ore grain size and the type and grain size of the carbon materials. Graphite, coke and charcoal have been …
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Semantic Scholar extracted view of "Open system sulphate reduction in a diagenetic environment – Isotopic analysis of barite (δ34S and δ18O) and pyrite (δ34S) from the Tom and Jason Late Devonian Zn–Pb–Ba deposits, Selwyn Basin, …
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Eighty ore samples are divided into seven types according to altered minerals, including dolomite, iron oxide, aegirine, riebeckite, biotite, fluorite, and barite types. …
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Cost-effective integrated strategy for the fabrication of hard-magnet barium hexaferrite powders from low-grade barite ore. International Journal of Minerals, …
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