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Barite is processed by carbothermal reduction (heating with coke) to give barium sulfide: BaSO4 + 4 C BaS + 4 CO In contrast to barium sulfate, barium sulfide is soluble in water and readily converted to the oxide, carbonate, and halides. To produce highly pure barium sulfate, the sulfide or chloride is treated with sulfuric acid or sulfate
Barium slag (BS) is an insoluble alkali residue derived from the product of barium compounds following the process of carbothermal reduction and water/acid leaching.
ABSTRACT: 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 carried out by using any type of cheap and easily available coal, but the extent of reduction rarely exceeds 3540%.
coal, the extent of carbothermal reduction of barite increases effectively. Table 3 summarises the effect of quality of coal on carbothermal anaerobic solid phase reduction of barites in the pit furnace. The obtained results show that the general impact of steam coal in the carbothermal reduction of barite increases the yield of barium sulphide.
The reduction of pure barium sulphate and of barytes to barium sulphide and soluble barium compounds has been carried out in an indirectly heated tube furnace using carbon as the reducing agent. Increasing the reduction temperature increases the yield of barium compounds.
Effect of reduction reaction time (min) on the barium sulphate conversion, barium sulphide selectivity from barium sulphate and the tube furnace yield of barium sulphide from barium sulphate.
#0183;#32;Barium sulfate, which is recycled according to a new flowsheet of sodium sulfide production, was reduced by various carboncontaining materials (oil and furnace coke and Zhgrade coal). The reduction process was studied in comparison with the reduction of natural barite concentrate.
#0183;#32;The kinetic parameters of the reduction of barium sulphate to barium sulphide using carbon monoxide fractions of % and temperatures of #176;C, using an isothermal thermogravimetric method, were obtained. This reaction has shown to be temperature and carbon monoxide concentration dependent.
After admixing calcium chloride in matrix for the carbothermal reduction of barite, the result shows that yields of barium sulphide have been found to increase to the order of 52 percent.
Occurrence: Barium sulfate can be found in some minerals; particularly the mineral barite is a large source of barium sulfate. The purification and extraction of barium sulfate from the mineral is made through a process called carbothermal reduction, which consists in heating the material with coke and then, the product of this reactions is treated with sulfuric acid.
Barium sulfate, which is recycled according to a new flowsheet of sodium sulfide production, was reduced by various carboncontaining materials (oil and furnace coke and Zhgrade coal). The reduction process was studied in comparison with the reduction of natural barite concentrate.
Barite is processed by carbothermal reduction (heating with coke) to give barium sulfide: BaSO4 + 4 C BaS + 4 CO In contrast to barium sulfate, barium sulfide is soluble in water and readily converted to the oxide, carbonate, and halides. To produce highly pure barium sulfate, the sulfide or chloride is treated with sulfuric acid or sulfate
Carbothermic reactions involve the reduction of substances, often metal oxides (), using carbon as the reducing chemical reactions are usually conducted at temperatures of several hundred degrees Celsius. Such processes are applied for production of the elemental forms of many elements. The ability of metals to participate in carbothermic reactions can be predicted from
The reduction of BaSO 4 by carbon was investigated by means of isothermal thermogravimetric measurements. In combination with a hightemperature thermobalance, solid electrolyte cells were used (i) to purify the N 2 flow gas, and (ii) to measure the partial pressure of oxygen (COCO 2 ratio, respectively) in the outlet gases.. Mass loss curves and (p_{o_2 } ) in the outlet gases were
#0183;#32;The reduction of BaSO 4 by carbon was investigated by means of isothermal thermogravimetric measurements. In combination with a hightemperature thermobalance, solid electrolyte cells were used (i) to purify the N 2 flow gas, and (ii) to measure the partial pressure of oxygen (COCO 2 ratio, respectively) in the outlet gases.. Mass loss curves and (p_{o_2 } ) in the outlet
Barium sulfate Wikipedia
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