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 ...
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 …
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 %.
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 …
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, …
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 ...
An industrial barite powder was used as the starting raw mate-rial in present study. Chemical composition of selected barite was determined by X-ray method that is reported in Table 1. The min-eralogical analysis of used barite ore indicated barite (BaSO4) and quartz as main minerals, and the amounts of crystals are also reported in …
For experimental investigation of reduction process, the refractory sulphide – barite ore from the "Bobija" deposit was used, and comminuted to -37 m particles.
The role of normal and activated bentonite on the pelletization of barite iron ore concentrate and the quality of pellets. Author links open overlay panel O.A Mohamed a, M.E.H Shalabi a, N.A El-Hussiny a ... Effect of activated bentonite addition on the reduction extent of the high barite iron ore concentrate fired pellets (reduction ...
Refractory sulphide–barite ore was reduced with carbon in order to release lead, zinc, and copper sulphide from barite-pyrite base. Mineralogical investigations …
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 …
Cost-effective integrated strategy for the fabrication of hard-magnet barium hexaferrite powders from low-grade barite ore. International Journal of Minerals, …
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 ...
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 …
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.
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.
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 …
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.
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.
Barite is typically found in ore deposits (Clark et al., 2004). The common associated minerals of barite in the deposits are usually quartz, fluorite, ... Thus, pressure and/or temperature reduction from the reservoir to the surface can increase barite precipitation. However, the typical pressure and temperature drop will rarely cause barite ...
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 ...
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 ...
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 …
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 ...
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).
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, …
Beneficiation of Barite Ores. Srdjan M. Bulatovic, in Handbook of Flotation Reagents: Chemistry, Theory and Practice, Volume 3, 2015. Abstract. Barite is the only barium …
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).
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 ...
Abstract— The Ushkatyn-III deposit is located in Central Kazakhstan, 300 km west of the city of Karaganda. The ore member consists of Upper Devonian carbonate rocks containing stratiform layers of hydrothermal–sedimentary iron–manganese and hydrothermal barite–lead ores. The study objects include barite–lead (barite–galena) …
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...
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.
Eighty ore samples are divided into seven types according to altered minerals, including dolomite, iron oxide, aegirine, riebeckite, biotite, fluorite, and barite types. …
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).
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.
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 …