Karbonatlı mangan cevherinin izotermal olmayan dekompozisyon kinetiği

The non-isothermal kinetics of decomposition of manganese carbonate ore from Denizli Tavas region was studied. The ore decomposed according to a serie of reaction, MnCO3 →(400-600°C) MnO2 →(>600) Mn2O3. By using of Kissenger equation, the activation energies for the decomposition of MnCO3 to MnO2 and the transformation of MnO2 to Mn2O3 were calculated as 185,7 kJ/mol and 217,3 kJ/mol, respectively.

Anahtar Kelimeler:

karbonatlı mangan cevheri, izotermal olmayan kinetik, dekompozisyon kinetiği

The non-isothermal kinetics of decomposition of manganese carbonate ore

Keywords:

manganese carbonate ore, non-isothermal kinetics, decomposition kinetics,

PDF

___

Sekizinci Beş Yıllık Kalkınma Planı, Madencilik Özel İhtisas Komisyon Raporu, DPT:2629, ÖİK:640, s.64-78, Ankara 2001.
http://www.manganese.org [3]
www.manganese.org, 2006
MOMADE, F.W.Y., Sulfuric acid leaching of the Nsuta manganese carbonate ore, Hydrometallurgy, 40, 123-134, 1996.
ARSLAN, C., ARSLAN, F., DEMİR, A., Sulfuric acid leaching of manganese carbonate ores and its kinetics, 10. Uluslar arası Metalurji ve Malzeme Kongresi, Cilt.1, 13-20, 24-28 Mayıs 2005, İstanbul, Türkiye.
YILMAZ, M., Direct leaching of Denizli-Tavas manganese ore with sulphuric acid, MSc Thesis, METU, The Graduate School of Natural and Applied Sciences, Sept. 1998.
SHAHEEN, W.M., SELİM, M.M., Effect of thermal treatment on physicochemical properties of pure and mixed manganese carbonate and basic copper carbonate, Thermochimica Acta, 332, 117-128, 1998.
LEI, S., TANG, K., FANG, Z., LIU, Q., ZHENG, H., Preparation of α-Mn2O3 and MnO from thermal decomposition of MnCO3 and control of morphology, Materials Letters, 60, 53-56, 2006.
GALWEY, A.K., Is the science of thermal analysis kinetics based on solid foundations ? A literature appraisal, Thermochimica Acta, 413, 139-183, 2004.
CABALLERO, J.A., CONESA, J.A., Mathematical considerations for nonisothermal kinetics in thermal decomposition, J.Anal.Appl.Pyrolysis, 73, 85-100, 2005.
BROWN, M.E., Introduction to Thermal Analysis- Techniques and Applications, 2nd Ed., Kluwer Academic Pub., NJ,USA, 2001. – Annual Rewiev,