Thus the aim of this work was to study the kinetics of reduction of barite ore with charcoal pellets (produced by adding 13 % water or 9 % water with 4 % molasses as a binder) in air. Results indicated the following: 1. The pelletization of barium sulphate with charcoal using the molasses as a binder gave pellets with a reasonable mechanical ...
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The maximum removal of barite from ore was 96.7% at 900oC after 180 min. Chemically controlled kinetic model showed the best compliance with the experimental data. An activation energy of 142...
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The pulverized barite ore samples were collected and reduced further using a Shambhavi Impex ball mill in order to pass through the 355µm sieve size. A set of sieves were arranged from the 355µm to 50µm. This sieve arrangement was placed on a pan and the barite ore samples placed on the top sieves (355µm) with a lid cover.
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A front of barite precipitation and dissolution (the 'barite front') is moving through the sedimentary column in the depth range of near zero pore-water sulphate, which at a drastic reduction of ...
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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.
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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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Direct reduction of iron ore (DRI) is gaining an increased attention due to the growing need to decarbonize industrial processes. The current industrial DRI processes are performed using reformed natural gas, which results in CO 2 emission, although it is less than carbothermic reduction in the blast furnace. Carbon-free reduction may be realized through the utilization of …
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Barite ore is the natural starting material for producing various barium components. Currently, there are two main methods for manufacturing barium components and the reduction process is based on two-steps [3]. ... The reduction of barite by coke powder presents important environmental and safety drawbacks since it is moved by gas flow and ...
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Kinetics of barite reduction from refractory barite-sulphide ore . × Close Log In. Log in with Facebook Log in with Google. or. Email. Password. Remember me on this computer. or reset ... Kinetics of barite reduction from refractory barite-sulphide ore. Branislav Markovic. 2016, Metallurgical and Materials Engineering ...
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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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2.1 Energy. Rock drilling, blasting, and comminution (crushing and grinding) consume a vast amount of energy in hard rock mines. As mentioned in Sect. 1, statistics from hard rock mines indicates that drilling and blasting consumes 2% and comminution does 53% of the total energy input in the whole production chain from mining to mineral processing (Spathis …
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Barium sulfide is an important intermediate in the manufacture of ceramics, glass, plastics, and pharmaceutical products. This substance is traditionally obtained by carbothermal reduction of barite (barium sulfate) in the presence of a carbon-containing reducing agent, mainly coal. Herein, it is demonstrated that compaction of the charge before the carbothermal …
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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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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 …
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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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In order to improve the gasification rate potassium carbonate was doped on coke as catalyst. The mixture of barite and coke powder was shaped by a laboratory extruder and …
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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 addition of hydrogen ...
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Thus the aim of this work was to study the kinetics of reduction of barite ore with charcoal pellets (produced by adding 13 % water or 9 % water with 4 % molasses as a binder) in air. Results indicated the following: 1. The pelletization of barium sulphate with charcoal using the molasses as a binder gave pellets with a reasonable mechanical ...
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A low-grade lead-zinc ore in Guangxi, China, contains valuable components like galena, sphalerite, pyrite, barite, etc. and the gangue mineral is primarily dolomite.
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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 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 barite ore is associated with a lot of impurities and an analysis of the ore using X-ray Fluorescence indicated that apart from the major elements namely; barium and sulphur, about 18 other ...
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Reduction reaction of barite ore powder was prepared from mines in Semnan city in northern Iran and reduced at 1000 °C in the presence of 20 vol % steam by pure methane and natural gas. Fig. 14 compares the progress of these reactions with the reaction of pure barium sulfate with pure methane gas at 1000 °C. As the figure shows, the results ...
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Reduction of barium sulfate (BaSO 4) to barium sulfide (BaS) is an important step for the producing of barium chemicals from barite (natural barium sulfate mineral).Barite ore is a basic starting material for manufacturing of a variety of barium chemicals such as BaCO 3, Ba(OH) 2, Ba(NO 3) 2, Ba(HS) 2, BaO, etc.In the so-called "black-ash process", the reduction …
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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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This substance is traditionally obtained by carbothermal reduction of barite (barium sulfate) in the presence of a carbon-containing reducing agent, mainly coal. Herein, it is demonstrated that ...
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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 [4], [5]: …
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Barite is an inorganic mineral mainly constituted by barium sulfate (BaSO4) which finds applications across a variety of industries. Low quality barite can be beneficiated to meet high-purity requirement. Thus, in this work, we developed an optimum beneficiation process for upgrading barite-bearing ore from Azare in Bauchi State, Nigeria. The optimum condition for …
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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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reduction of barite under anaerobic conditions. The results show that by using steam coal for carbothermal reduction of barite, the yield of barium sulphide has been found to be almost …
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The compressive strength of fire high phosphors iron briquette at 9001200oC. 3.3 Reduction of High Phosphorus Iron Ore Briquette Reduction was carried out at different temperatures range from 900˚C to 1200˚C, keeping the briquette weight and hydrogen flow rate constant (1.5 L.min-1).
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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, Canada" by J. Magnall et al.
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Analyzed samples reveal two distinct isotopic patterns, indicating different formation processes related to sulfate reduction and hydrothermal activities. The findings suggest that the structural and isotopic variations of barite point to a genetic relationship between barite and massive sulfide mineralization, enhancing the understanding of ...
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The reduction of barite concentrate with hydrogen was studied by using a Shimadzu 31 H Thermoanalyser coupled with a gas-feeding system and a Uras 7 N infrared SO2 gasanalyser made by Hartman Brown Co. The kinetic parameters were determined by means of a computer program on the basis of the thermogravimetric curves in the temperature range 1098–1223 K. …
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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, Metallurgy, …
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overcome this, Primetals Technologies develops a direct reduction process, which is suitable to handle charging of iron ore concentrates (grain size <150 µm) directly into the process without need of prior agglomeration and using hydrogen as a reducing agent, named HYFOR (Hydrogen-based fine ore reduction).
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Abstract: Reduction of high barite iron ore briquettes by hydrogen is carried out in the temperature range 700 to 1000 oC. In the reduction kinetic study, the most satisfactory model is to take the slope of the initial linear region of
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