Effects of Temperature and Particle Size Distribution on Barite Reduction by Carbon monoxide Gas

Document Type : Research Article


Department of Metallurgy and Materials Engineering, Hamedan University of Technology, Hamedan, Iran


In this research, a mineral barite powder was reduced by carbon monoxide gas and the effects of reduction time and temperature was investigated as well as barite particle size. Results showed that the best result would be feasible when the barite particle sizes are between (-70 +100) in mesh scale. The barite reduction could reach the maximum level (98%) after reduction by carbon monoxide at 850°C for one hour. Meanwhile, the same amount of reduction could have been achieved in shorter time intervals at higher temperatures. The kinetics model for reduction process was also determined and activation energy was calculated.


[1]   A. Salem and Y. T. Osgouei, “The effect of particle size distribution on barite reduction,” Mater. Res. Bull., vol. 44, no. 7, pp. 1489–1493, 2009.
[2]   A. Salem and S. Jamshidi, “Effect of paste humidity on kinetics of carbothermal reduction of extruded barite and coke mixture,” Solid State Sci., vol. 14, no. 8, pp. 1012–1017, 2012.
[3]   D. Guzmán, J. Fernández, S. Ordoñez, C. Aguilar, P. A. Rojas, and D. Serafini, “Effect of mechanical activation on the barite carbothermic reduction,” Int. J. Miner. Process., vol. 102–103, pp. 124–129, 2012.
[4]   A. Salem, Y. T. Osgouei, and S. Jamshidi, “Kinetic Study of Barite Carbothermic Reduction in Presence of Sodium Carbonate as Catalyst,” Iran. J. Chem. Eng., vol. 7, no. 2, 2010.
[5]   Y. Pelovski, K. Ninova, I. Gruncharov, and I. Dombalov, “Isothermal reduction of barite with hydrogen,” J. Therm. Anal., vol. 36, no. 6, pp. 2037–2043, 1990.
[6]   R. V. Culver, C. J. Hamdrof, and E. C. R. Spooner, “The reduction of barytes with hydrogen. i. kinetic studies in a differential reactor,” J. Appl. Chem., no. 3, pp. 810–819, 1958.
[7]   W. V. Schulmeyer and H. M. Ortner, “Mechanisms of the hydrogen reduction of molybdenum oxides,” Int. J. Refract. Met. Hard Mater., vol. 20, no. 4, pp. 261–269, 2002.
[8]   E. Jamshidi and H. A. Ebrahim, “A new clean process for barium carbonate preparation by barite reduction with methane,” Chem. Eng. Process. Process Intensif., vol. 47, no. 9–10, pp. 1567–1577, 2008.
[9]   N. G. Gallegos and J. M. P. Lopez, “Kinetic study of cobalt oxides reduction by hydrogen,” Mater. Chem. Phys., vol. 19, no. 5, pp. 431–446, 1988.
[10] P. S. Hlabela, H. W. J. P. Neomagus, F. B. Waanders, and O. S. L. Bruinsma, “Thermal reduction of barium sulphate with carbon monoxide-A thermogravimetric study,” Thermochim. Acta, vol. 498, no. 1–2, pp. 67–70, 2010.
[11] S. Jamshidi and A. Salem, “Role of extrusion process on kinetic of carbothermal reduction of barite,” Thermochim. Acta, vol. 503–504, no. 1, pp. 108–114, 2010.
[12] H.-G. Lee, Chemical Thermodynamic of Metals and Materials. Imperial College Press, 1999.
[13] M. J. Pilling and P. W. Seakins, Reaction kinetics., 2nd ed. Oxford Science Publications, 1996.
[14] J. H. Espenson, Chemical Kinetics and Reaction Mechanisms. 2002.
[15] F. Habashi, Kinetics of Metallurgical Processes. Métallurgie Extractive Québec, 1999.
[16] H.S.Ray, Kinetics of metallurgical reactions. Oxford & IBH Publishing, 1993.